Initial revision
diff --git a/cpu/74xx_7xx/cache.S b/cpu/74xx_7xx/cache.S
new file mode 100644
index 0000000..f35966c
--- /dev/null
+++ b/cpu/74xx_7xx/cache.S
@@ -0,0 +1,381 @@
+#include <config.h>
+#include <mpc74xx.h>
+#include <version.h>
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#include <asm/cache.h>
+#include <asm/mmu.h>
+
+#ifndef CACHE_LINE_SIZE
+# define CACHE_LINE_SIZE L1_CACHE_BYTES
+#endif
+
+#if CACHE_LINE_SIZE == 128
+#define LG_CACHE_LINE_SIZE 7
+#elif CACHE_LINE_SIZE == 32
+#define LG_CACHE_LINE_SIZE 5
+#elif CACHE_LINE_SIZE == 16
+#define LG_CACHE_LINE_SIZE 4
+#elif CACHE_LINE_SIZE == 8
+#define LG_CACHE_LINE_SIZE 3
+#else
+# error "Invalid cache line size!"
+#endif
+
+/*
+ * Invalidate L1 instruction cache.
+ */
+_GLOBAL(invalidate_l1_instruction_cache)
+ mfspr r3,PVR
+ rlwinm r3,r3,16,16,31
+ cmpi 0,r3,1
+ beqlr /* for 601, do nothing */
+ /* 603/604 processor - use invalidate-all bit in HID0 */
+ mfspr r3,HID0
+ ori r3,r3,HID0_ICFI
+ mtspr HID0,r3
+ isync
+ blr
+
+/*
+ * Invalidate L1 data cache.
+ */
+_GLOBAL(invalidate_l1_data_cache)
+ mfspr r3,HID0
+ ori r3,r3,HID0_DCFI
+ mtspr HID0,r3
+ isync
+ blr
+
+/*
+ * Flush data cache.
+ */
+_GLOBAL(flush_data_cache)
+ lis r3,0
+ lis r5,CACHE_LINE_SIZE
+flush:
+ cmp 0,1,r3,r5
+ bge done
+ lwz r5,0(r3)
+ lis r5,CACHE_LINE_SIZE
+ addi r3,r3,0x4
+ b flush
+done:
+ blr
+/*
+ * Write any modified data cache blocks out to memory
+ * and invalidate the corresponding instruction cache blocks.
+ * This is a no-op on the 601.
+ *
+ * flush_icache_range(unsigned long start, unsigned long stop)
+ */
+_GLOBAL(flush_icache_range)
+ mfspr r5,PVR
+ rlwinm r5,r5,16,16,31
+ cmpi 0,r5,1
+ beqlr /* for 601, do nothing */
+ li r5,CACHE_LINE_SIZE-1
+ andc r3,r3,r5
+ subf r4,r3,r4
+ add r4,r4,r5
+ srwi. r4,r4,LG_CACHE_LINE_SIZE
+ beqlr
+ mtctr r4
+ mr r6,r3
+1: dcbst 0,r3
+ addi r3,r3,CACHE_LINE_SIZE
+ bdnz 1b
+ sync /* wait for dcbst's to get to ram */
+ mtctr r4
+2: icbi 0,r6
+ addi r6,r6,CACHE_LINE_SIZE
+ bdnz 2b
+ sync /* additional sync needed on g4 */
+ isync
+ blr
+/*
+ * Write any modified data cache blocks out to memory.
+ * Does not invalidate the corresponding cache lines (especially for
+ * any corresponding instruction cache).
+ *
+ * clean_dcache_range(unsigned long start, unsigned long stop)
+ */
+_GLOBAL(clean_dcache_range)
+ li r5,CACHE_LINE_SIZE-1
+ andc r3,r3,r5 /* align r3 down to cache line */
+ subf r4,r3,r4 /* r4 = offset of stop from start of cache line */
+ add r4,r4,r5 /* r4 += cache_line_size-1 */
+ srwi. r4,r4,LG_CACHE_LINE_SIZE /* r4 = number of cache lines to flush */
+ beqlr /* if r4 == 0 return */
+ mtctr r4 /* ctr = r4 */
+
+ sync
+1: dcbst 0,r3
+ addi r3,r3,CACHE_LINE_SIZE
+ bdnz 1b
+ sync /* wait for dcbst's to get to ram */
+ blr
+
+/*
+ * Write any modified data cache blocks out to memory
+ * and invalidate the corresponding instruction cache blocks.
+ *
+ * flush_dcache_range(unsigned long start, unsigned long stop)
+ */
+_GLOBAL(flush_dcache_range)
+ li r5,CACHE_LINE_SIZE-1
+ andc r3,r3,r5
+ subf r4,r3,r4
+ add r4,r4,r5
+ srwi. r4,r4,LG_CACHE_LINE_SIZE
+ beqlr
+ mtctr r4
+
+ sync
+1: dcbf 0,r3
+ addi r3,r3,CACHE_LINE_SIZE
+ bdnz 1b
+ sync /* wait for dcbf's to get to ram */
+ blr
+
+/*
+ * Like above, but invalidate the D-cache. This is used by the 8xx
+ * to invalidate the cache so the PPC core doesn't get stale data
+ * from the CPM (no cache snooping here :-).
+ *
+ * invalidate_dcache_range(unsigned long start, unsigned long stop)
+ */
+_GLOBAL(invalidate_dcache_range)
+ li r5,CACHE_LINE_SIZE-1
+ andc r3,r3,r5
+ subf r4,r3,r4
+ add r4,r4,r5
+ srwi. r4,r4,LG_CACHE_LINE_SIZE
+ beqlr
+ mtctr r4
+
+ sync
+1: dcbi 0,r3
+ addi r3,r3,CACHE_LINE_SIZE
+ bdnz 1b
+ sync /* wait for dcbi's to get to ram */
+ blr
+
+/*
+ * Flush a particular page from the data cache to RAM.
+ * Note: this is necessary because the instruction cache does *not*
+ * snoop from the data cache.
+ * This is a no-op on the 601 which has a unified cache.
+ *
+ * void __flush_page_to_ram(void *page)
+ */
+_GLOBAL(__flush_page_to_ram)
+ mfspr r5,PVR
+ rlwinm r5,r5,16,16,31
+ cmpi 0,r5,1
+ beqlr /* for 601, do nothing */
+ rlwinm r3,r3,0,0,19 /* Get page base address */
+ li r4,4096/CACHE_LINE_SIZE /* Number of lines in a page */
+ mtctr r4
+ mr r6,r3
+0: dcbst 0,r3 /* Write line to ram */
+ addi r3,r3,CACHE_LINE_SIZE
+ bdnz 0b
+ sync
+ mtctr r4
+1: icbi 0,r6
+ addi r6,r6,CACHE_LINE_SIZE
+ bdnz 1b
+ sync
+ isync
+ blr
+
+/*
+ * Flush a particular page from the instruction cache.
+ * Note: this is necessary because the instruction cache does *not*
+ * snoop from the data cache.
+ * This is a no-op on the 601 which has a unified cache.
+ *
+ * void __flush_icache_page(void *page)
+ */
+_GLOBAL(__flush_icache_page)
+ mfspr r5,PVR
+ rlwinm r5,r5,16,16,31
+ cmpi 0,r5,1
+ beqlr /* for 601, do nothing */
+ li r4,4096/CACHE_LINE_SIZE /* Number of lines in a page */
+ mtctr r4
+1: icbi 0,r3
+ addi r3,r3,CACHE_LINE_SIZE
+ bdnz 1b
+ sync
+ isync
+ blr
+
+/*
+ * Clear a page using the dcbz instruction, which doesn't cause any
+ * memory traffic (except to write out any cache lines which get
+ * displaced). This only works on cacheable memory.
+ */
+_GLOBAL(clear_page)
+ li r0,4096/CACHE_LINE_SIZE
+ mtctr r0
+1: dcbz 0,r3
+ addi r3,r3,CACHE_LINE_SIZE
+ bdnz 1b
+ blr
+
+/*
+ * Enable L1 Instruction cache
+ */
+_GLOBAL(icache_enable)
+ mfspr r3, HID0
+ li r5, HID0_ICFI|HID0_ILOCK
+ andc r3, r3, r5
+ ori r3, r3, HID0_ICE
+ ori r5, r3, HID0_ICFI
+ mtspr HID0, r5
+ mtspr HID0, r3
+ isync
+ blr
+
+/*
+ * Disable L1 Instruction cache
+ */
+_GLOBAL(icache_disable)
+ mfspr r3, HID0
+ li r5, 0
+ ori r5, r5, HID0_ICE
+ andc r3, r3, r5
+ mtspr HID0, r3
+ isync
+ blr
+
+/*
+ * Is instruction cache enabled?
+ */
+_GLOBAL(icache_status)
+ mfspr r3, HID0
+ andi. r3, r3, HID0_ICE
+ blr
+
+
+_GLOBAL(l1dcache_enable)
+ mfspr r3, HID0
+ li r5, HID0_DCFI|HID0_DLOCK
+ andc r3, r3, r5
+ mtspr HID0, r3 /* no invalidate, unlock */
+ ori r3, r3, HID0_DCE
+ ori r5, r3, HID0_DCFI
+ mtspr HID0, r5 /* enable + invalidate */
+ mtspr HID0, r3 /* enable */
+ sync
+ blr
+
+/*
+ * Enable data cache(s) - L1 and optionally L2
+ * Calls l2cache_enable. LR saved in r5
+ */
+_GLOBAL(dcache_enable)
+ mfspr r3, HID0
+ li r5, HID0_DCFI|HID0_DLOCK
+ andc r3, r3, r5
+ mtspr HID0, r3 /* no invalidate, unlock */
+ ori r3, r3, HID0_DCE
+ ori r5, r3, HID0_DCFI
+ mtspr HID0, r5 /* enable + invalidate */
+ mtspr HID0, r3 /* enable */
+ sync
+#ifdef CFG_L2
+ mflr r5
+ bl l2cache_enable /* uses r3 and r4 */
+ sync
+ mtlr r5
+#endif
+ blr
+
+
+/*
+ * Disable data cache(s) - L1 and optionally L2
+ * Calls flush_data_cache and l2cache_disable_no_flush.
+ * LR saved in r4
+ */
+_GLOBAL(dcache_disable)
+ mflr r4 /* save link register */
+ bl flush_data_cache /* uses r3 and r5 */
+ sync
+ mfspr r3, HID0
+ li r5, HID0_DCFI|HID0_DLOCK
+ andc r3, r3, r5
+ mtspr HID0, r3 /* no invalidate, unlock */
+ li r5, HID0_DCE|HID0_DCFI
+ andc r3, r3, r5 /* no enable, no invalidate */
+ mtspr HID0, r3
+ sync
+#ifdef CFG_L2
+ bl l2cache_disable_no_flush /* uses r3 */
+#endif
+ mtlr r4 /* restore link register */
+ blr
+
+/*
+ * Is data cache enabled?
+ */
+_GLOBAL(dcache_status)
+ mfspr r3, HID0
+ andi. r3, r3, HID0_DCE
+ blr
+
+/*
+ * Invalidate L2 cache using L2I and polling L2IP
+ */
+_GLOBAL(l2cache_invalidate)
+ sync
+ oris r3, r3, L2CR_L2I@h
+ sync
+ mtspr l2cr, r3
+ sync
+invl2:
+ mfspr r3, l2cr
+ andi. r3, r3, L2CR_L2IP
+ bne invl2
+ /* turn off the global invalidate bit */
+ mfspr r3, l2cr
+ rlwinm r3, r3, 0, 11, 9
+ sync
+ mtspr l2cr, r3
+ sync
+ blr
+
+/*
+ * Enable L2 cache
+ * Calls l2cache_invalidate. LR is saved in r4
+ */
+_GLOBAL(l2cache_enable)
+ mflr r4 /* save link register */
+ bl l2cache_invalidate /* uses r3 */
+ sync
+ lis r3, L2_ENABLE@h
+ ori r3, r3, L2_ENABLE@l
+ mtspr l2cr, r3
+ isync
+ mtlr r4 /* restore link register */
+ blr
+
+/*
+ * Disable L2 cache
+ * Calls flush_data_cache. LR is saved in r4
+ */
+_GLOBAL(l2cache_disable)
+ mflr r4 /* save link register */
+ bl flush_data_cache /* uses r3 and r5 */
+ sync
+ mtlr r4 /* restore link register */
+l2cache_disable_no_flush: /* provide way to disable L2 w/o flushing */
+ lis r3, L2_INIT@h
+ ori r3, r3, L2_INIT@l
+ mtspr l2cr, r3
+ isync
+ blr
diff --git a/cpu/arm720t/start.S b/cpu/arm720t/start.S
new file mode 100644
index 0000000..e9899a9
--- /dev/null
+++ b/cpu/arm720t/start.S
@@ -0,0 +1,429 @@
+/*
+ * armboot - Startup Code for ARM720 CPU-core
+ *
+ * Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
+ * Copyright (c) 2002 Alex Züpke <azu@sysgo.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+
+
+#include <config.h>
+#include <version.h>
+
+
+/*
+ *************************************************************************
+ *
+ * Jump vector table as in table 3.1 in [1]
+ *
+ *************************************************************************
+ */
+
+
+.globl _start
+_start: b reset
+ ldr pc, _undefined_instruction
+ ldr pc, _software_interrupt
+ ldr pc, _prefetch_abort
+ ldr pc, _data_abort
+ ldr pc, _not_used
+ ldr pc, _irq
+ ldr pc, _fiq
+
+_undefined_instruction: .word undefined_instruction
+_software_interrupt: .word software_interrupt
+_prefetch_abort: .word prefetch_abort
+_data_abort: .word data_abort
+_not_used: .word not_used
+_irq: .word irq
+_fiq: .word fiq
+
+ .balignl 16,0xdeadbeef
+
+
+/*
+ *************************************************************************
+ *
+ * Startup Code (reset vector)
+ *
+ * do important init only if we don't start from memory!
+ * relocate armboot to ram
+ * setup stack
+ * jump to second stage
+ *
+ *************************************************************************
+ */
+
+/*
+ * CFG_MEM_END is in the board dependent config-file (configs/config_BOARD.h)
+ */
+_TEXT_BASE:
+ .word TEXT_BASE
+
+.globl _armboot_start
+_armboot_start:
+ .word _start
+
+/*
+ * Note: _armboot_end_data and _armboot_end are defined
+ * by the (board-dependent) linker script.
+ * _armboot_end_data is the first usable FLASH address after armboot
+ */
+.globl _armboot_end_data
+_armboot_end_data:
+ .word armboot_end_data
+.globl _armboot_end
+_armboot_end:
+ .word armboot_end
+
+/*
+ * _armboot_real_end is the first usable RAM address behind armboot
+ * and the various stacks
+ */
+.globl _armboot_real_end
+_armboot_real_end:
+ .word 0x0badc0de
+
+#ifdef CONFIG_USE_IRQ
+/* IRQ stack memory (calculated at run-time) */
+.globl IRQ_STACK_START
+IRQ_STACK_START:
+ .word 0x0badc0de
+
+/* IRQ stack memory (calculated at run-time) */
+.globl FIQ_STACK_START
+FIQ_STACK_START:
+ .word 0x0badc0de
+#endif
+
+
+/*
+ * the actual reset code
+ */
+
+reset:
+ /*
+ * set the cpu to SVC32 mode
+ */
+ mrs r0,cpsr
+ bic r0,r0,#0x1f
+ orr r0,r0,#0x13
+ msr cpsr,r0
+
+ /*
+ * we do sys-critical inits only at reboot,
+ * not when booting from ram!
+ */
+#ifdef CONFIG_INIT_CRITICAL
+ bl cpu_init_crit
+#endif
+
+relocate:
+ /*
+ * relocate armboot to RAM
+ */
+ adr r0, _start /* r0 <- current position of code */
+ ldr r2, _armboot_start
+ ldr r3, _armboot_end
+ sub r2, r3, r2 /* r2 <- size of armboot */
+ ldr r1, _TEXT_BASE /* r1 <- destination address */
+ add r2, r0, r2 /* r2 <- source end address */
+
+ /*
+ * r0 = source address
+ * r1 = target address
+ * r2 = source end address
+ */
+copy_loop:
+ ldmia r0!, {r3-r10}
+ stmia r1!, {r3-r10}
+ cmp r0, r2
+ ble copy_loop
+
+ /* set up the stack */
+ ldr r0, _armboot_end
+ add r0, r0, #CONFIG_STACKSIZE
+ sub sp, r0, #12 /* leave 3 words for abort-stack */
+
+ ldr pc, _start_armboot
+
+_start_armboot: .word start_armboot
+
+
+/*
+ *************************************************************************
+ *
+ * CPU_init_critical registers
+ *
+ * setup important registers
+ * setup memory timing
+ *
+ *************************************************************************
+ */
+
+
+/* Interupt-Controller base addresses */
+INTMR1: .word 0x80000280 @ 32 bit size
+INTMR2: .word 0x80001280 @ 16 bit size
+INTMR3: .word 0x80002280 @ 8 bit size
+
+/* SYSCONs */
+SYSCON1: .word 0x80000100
+SYSCON2: .word 0x80001100
+SYSCON3: .word 0x80002200
+
+#define CLKCTL 0x6 /* mask */
+#define CLKCTL_18 0x0 /* 18.432 MHz */
+#define CLKCTL_36 0x2 /* 36.864 MHz */
+#define CLKCTL_49 0x4 /* 49.152 MHz */
+#define CLKCTL_73 0x6 /* 73.728 MHz */
+
+cpu_init_crit:
+ /*
+ * mask all IRQs by clearing all bits in the INTMRs
+ */
+ mov r1, #0x00
+ ldr r0, INTMR1
+ str r1, [r0]
+ ldr r0, INTMR2
+ str r1, [r0]
+ ldr r0, INTMR3
+ str r1, [r0]
+
+ /*
+ * flush v4 I/D caches
+ */
+ mov r0, #0
+ mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */
+ mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
+
+ /*
+ * disable MMU stuff and caches
+ */
+ mrc p15,0,r0,c1,c0
+ bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS)
+ bic r0, r0, #0x0000008f @ clear bits 7, 3:0 (B--- WCAM)
+ orr r0, r0, #0x00000002 @ set bit 2 (A) Align
+ mcr p15,0,r0,c1,c0
+
+#ifdef CONFIG_ARM7_REVD
+ /* set clock speed */
+ /* !!! we run @ 36 MHz due to a hardware flaw in Rev. D processors */
+ /* !!! not doing DRAM refresh properly! */
+ ldr r0, SYSCON3
+ ldr r1, [r0]
+ bic r1, r1, #CLKCTL
+ orr r1, r1, #CLKCTL_36
+ str r1, [r0]
+#endif
+
+ /*
+ * before relocating, we have to setup RAM timing
+ * because memory timing is board-dependend, you will
+ * find a memsetup.S in your board directory.
+ */
+ mov ip, lr
+ bl memsetup
+ mov lr, ip
+
+ mov pc, lr
+
+
+
+
+/*
+ *************************************************************************
+ *
+ * Interrupt handling
+ *
+ *************************************************************************
+ */
+
+@
+@ IRQ stack frame.
+@
+#define S_FRAME_SIZE 72
+
+#define S_OLD_R0 68
+#define S_PSR 64
+#define S_PC 60
+#define S_LR 56
+#define S_SP 52
+
+#define S_IP 48
+#define S_FP 44
+#define S_R10 40
+#define S_R9 36
+#define S_R8 32
+#define S_R7 28
+#define S_R6 24
+#define S_R5 20
+#define S_R4 16
+#define S_R3 12
+#define S_R2 8
+#define S_R1 4
+#define S_R0 0
+
+#define MODE_SVC 0x13
+#define I_BIT 0x80
+
+/*
+ * use bad_save_user_regs for abort/prefetch/undef/swi ...
+ * use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling
+ */
+
+ .macro bad_save_user_regs
+ sub sp, sp, #S_FRAME_SIZE
+ stmia sp, {r0 - r12} @ Calling r0-r12
+ add r8, sp, #S_PC
+
+ ldr r2, _armboot_end
+ add r2, r2, #CONFIG_STACKSIZE
+ sub r2, r2, #8
+ ldmia r2, {r2 - r4} @ get pc, cpsr, old_r0
+ add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
+
+ add r5, sp, #S_SP
+ mov r1, lr
+ stmia r5, {r0 - r4} @ save sp_SVC, lr_SVC, pc, cpsr, old_r
+ mov r0, sp
+ .endm
+
+ .macro irq_save_user_regs
+ sub sp, sp, #S_FRAME_SIZE
+ stmia sp, {r0 - r12} @ Calling r0-r12
+ add r8, sp, #S_PC
+ stmdb r8, {sp, lr}^ @ Calling SP, LR
+ str lr, [r8, #0] @ Save calling PC
+ mrs r6, spsr
+ str r6, [r8, #4] @ Save CPSR
+ str r0, [r8, #8] @ Save OLD_R0
+ mov r0, sp
+ .endm
+
+ .macro irq_restore_user_regs
+ ldmia sp, {r0 - lr}^ @ Calling r0 - lr
+ mov r0, r0
+ ldr lr, [sp, #S_PC] @ Get PC
+ add sp, sp, #S_FRAME_SIZE
+ subs pc, lr, #4 @ return & move spsr_svc into cpsr
+ .endm
+
+ .macro get_bad_stack
+ ldr r13, _armboot_end @ setup our mode stack
+ add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack
+ sub r13, r13, #8
+
+ str lr, [r13] @ save caller lr / spsr
+ mrs lr, spsr
+ str lr, [r13, #4]
+
+ mov r13, #MODE_SVC @ prepare SVC-Mode
+ msr spsr_c, r13
+ mov lr, pc
+ movs pc, lr
+ .endm
+
+ .macro get_irq_stack @ setup IRQ stack
+ ldr sp, IRQ_STACK_START
+ .endm
+
+ .macro get_fiq_stack @ setup FIQ stack
+ ldr sp, FIQ_STACK_START
+ .endm
+
+/*
+ * exception handlers
+ */
+ .align 5
+undefined_instruction:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_undefined_instruction
+
+ .align 5
+software_interrupt:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_software_interrupt
+
+ .align 5
+prefetch_abort:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_prefetch_abort
+
+ .align 5
+data_abort:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_data_abort
+
+ .align 5
+not_used:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_not_used
+
+#ifdef CONFIG_USE_IRQ
+
+ .align 5
+irq:
+ get_irq_stack
+ irq_save_user_regs
+ bl do_irq
+ irq_restore_user_regs
+
+ .align 5
+fiq:
+ get_fiq_stack
+ /* someone ought to write a more effiction fiq_save_user_regs */
+ irq_save_user_regs
+ bl do_fiq
+ irq_restore_user_regs
+
+#else
+
+ .align 5
+irq:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_irq
+
+ .align 5
+fiq:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_fiq
+
+#endif
+
+ .align 5
+.globl reset_cpu
+reset_cpu:
+ mov ip, #0
+ mcr p15, 0, ip, c7, c7, 0 @ invalidate cache
+ mcr p15, 0, ip, c8, c7, 0 @ flush TLB (v4)
+ mrc p15, 0, ip, c1, c0, 0 @ get ctrl register
+ bic ip, ip, #0x000f @ ............wcam
+ bic ip, ip, #0x2100 @ ..v....s........
+ mcr p15, 0, ip, c1, c0, 0 @ ctrl register
+ mov pc, r0
diff --git a/cpu/arm920t/start.S b/cpu/arm920t/start.S
new file mode 100644
index 0000000..a858dfa
--- /dev/null
+++ b/cpu/arm920t/start.S
@@ -0,0 +1,475 @@
+/*
+ * armboot - Startup Code for ARM920 CPU-core
+ *
+ * Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
+ * Copyright (c) 2002 Alex Züpke <azu@sysgo.de>
+ * Copyright (c) 2002 Gary Jennejohn <gj@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+
+
+#include <config.h>
+#include <version.h>
+
+
+/*
+ *************************************************************************
+ *
+ * Jump vector table as in table 3.1 in [1]
+ *
+ *************************************************************************
+ */
+
+
+.globl _start
+_start: b reset
+ ldr pc, _undefined_instruction
+ ldr pc, _software_interrupt
+ ldr pc, _prefetch_abort
+ ldr pc, _data_abort
+ ldr pc, _not_used
+ ldr pc, _irq
+ ldr pc, _fiq
+
+_undefined_instruction: .word undefined_instruction
+_software_interrupt: .word software_interrupt
+_prefetch_abort: .word prefetch_abort
+_data_abort: .word data_abort
+_not_used: .word not_used
+_irq: .word irq
+_fiq: .word fiq
+
+ .balignl 16,0xdeadbeef
+
+
+/*
+ *************************************************************************
+ *
+ * Startup Code (reset vector)
+ *
+ * do important init only if we don't start from memory!
+ * relocate armboot to ram
+ * setup stack
+ * jump to second stage
+ *
+ *************************************************************************
+ */
+
+/*
+ * CFG_MEM_END is in the board dependent config-file (configs/config_BOARD.h)
+ */
+_TEXT_BASE:
+ .word TEXT_BASE
+
+.globl _armboot_start
+_armboot_start:
+ .word _start
+
+/*
+ * Note: _armboot_end_data and _armboot_end are defined
+ * by the (board-dependent) linker script.
+ * _armboot_end_data is the first usable FLASH address after armboot
+ */
+.globl _armboot_end_data
+_armboot_end_data:
+ .word armboot_end_data
+.globl _armboot_end
+_armboot_end:
+ .word armboot_end
+
+/*
+ * _armboot_real_end is the first usable RAM address behind armboot
+ * and the various stacks
+ */
+.globl _armboot_real_end
+_armboot_real_end:
+ .word 0x0badc0de
+
+#ifdef CONFIG_USE_IRQ
+/* IRQ stack memory (calculated at run-time) */
+.globl IRQ_STACK_START
+IRQ_STACK_START:
+ .word 0x0badc0de
+
+/* IRQ stack memory (calculated at run-time) */
+.globl FIQ_STACK_START
+FIQ_STACK_START:
+ .word 0x0badc0de
+#endif
+
+
+/*
+ * the actual reset code
+ */
+
+reset:
+ /*
+ * set the cpu to SVC32 mode
+ */
+ mrs r0,cpsr
+ bic r0,r0,#0x1f
+ orr r0,r0,#0xd3
+ msr cpsr,r0
+
+/* turn off the watchdog */
+#if defined(CONFIG_S3C2400)
+#define pWTCON 0x15300000
+/* Interupt-Controller base addresses */
+#define INTMSK 0x14400008
+/* clock divisor register */
+#define CLKDIVN 0x14800014
+#elif defined(CONFIG_S3C2410)
+#define pWTCON 0x53000000
+/* Interupt-Controller base addresses */
+#define INTMSK 0x4A000008
+#define INTSUBMSK 0x4A00001C
+/* clock divisor register */
+#define CLKDIVN 0x4C000014
+#endif
+
+ ldr r0, =pWTCON
+ mov r1, #0x0
+ str r1, [r0]
+
+ /*
+ * mask all IRQs by setting all bits in the INTMR - default
+ */
+ mov r1, #0xffffffff
+ ldr r0, =INTMSK
+ str r1, [r0]
+#if defined(CONFIG_S3C2410)
+ ldr r1, =0x3ff
+ ldr r0, =INTSUBMSK
+ str r1, [r0]
+#endif
+
+ /* FCLK:HCLK:PCLK = 1:2:4 */
+ /* default FCLK is 120 MHz ! */
+ ldr r0, =CLKDIVN
+ mov r1, #3
+ str r1, [r0]
+
+ /*
+ * we do sys-critical inits only at reboot,
+ * not when booting from ram!
+ */
+#ifdef CONFIG_INIT_CRITICAL
+ bl cpu_init_crit
+#endif
+
+relocate:
+ /*
+ * relocate armboot to RAM
+ */
+ adr r0, _start /* r0 <- current position of code */
+ ldr r2, _armboot_start
+ ldr r3, _armboot_end
+ sub r2, r3, r2 /* r2 <- size of armboot */
+ ldr r1, _TEXT_BASE /* r1 <- destination address */
+ add r2, r0, r2 /* r2 <- source end address */
+
+ /*
+ * r0 = source address
+ * r1 = target address
+ * r2 = source end address
+ */
+copy_loop:
+ ldmia r0!, {r3-r10}
+ stmia r1!, {r3-r10}
+ cmp r0, r2
+ ble copy_loop
+
+#if 0
+ /* try doing this stuff after the relocation */
+ ldr r0, =pWTCON
+ mov r1, #0x0
+ str r1, [r0]
+
+ /*
+ * mask all IRQs by setting all bits in the INTMR - default
+ */
+ mov r1, #0xffffffff
+ ldr r0, =INTMR
+ str r1, [r0]
+
+ /* FCLK:HCLK:PCLK = 1:2:4 */
+ /* default FCLK is 120 MHz ! */
+ ldr r0, =CLKDIVN
+ mov r1, #3
+ str r1, [r0]
+ /* END stuff after relocation */
+#endif
+
+ /* set up the stack */
+ ldr r0, _armboot_end
+ add r0, r0, #CONFIG_STACKSIZE
+ sub sp, r0, #12 /* leave 3 words for abort-stack */
+
+ ldr pc, _start_armboot
+
+_start_armboot: .word start_armboot
+
+
+/*
+ *************************************************************************
+ *
+ * CPU_init_critical registers
+ *
+ * setup important registers
+ * setup memory timing
+ *
+ *************************************************************************
+ */
+
+
+cpu_init_crit:
+ /*
+ * flush v4 I/D caches
+ */
+ mov r0, #0
+ mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */
+ mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
+
+ /*
+ * disable MMU stuff and caches
+ */
+ mrc p15, 0, r0, c1, c0, 0
+ bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS)
+ bic r0, r0, #0x00000087 @ clear bits 7, 2:0 (B--- -CAM)
+ orr r0, r0, #0x00000002 @ set bit 2 (A) Align
+ orr r0, r0, #0x00001000 @ set bit 12 (I) I-Cache
+ mcr p15, 0, r0, c1, c0, 0
+
+
+ /*
+ * before relocating, we have to setup RAM timing
+ * because memory timing is board-dependend, you will
+ * find a memsetup.S in your board directory.
+ */
+ mov ip, lr
+ bl memsetup
+ mov lr, ip
+
+ mov pc, lr
+
+
+
+
+/*
+ *************************************************************************
+ *
+ * Interrupt handling
+ *
+ *************************************************************************
+ */
+
+@
+@ IRQ stack frame.
+@
+#define S_FRAME_SIZE 72
+
+#define S_OLD_R0 68
+#define S_PSR 64
+#define S_PC 60
+#define S_LR 56
+#define S_SP 52
+
+#define S_IP 48
+#define S_FP 44
+#define S_R10 40
+#define S_R9 36
+#define S_R8 32
+#define S_R7 28
+#define S_R6 24
+#define S_R5 20
+#define S_R4 16
+#define S_R3 12
+#define S_R2 8
+#define S_R1 4
+#define S_R0 0
+
+#define MODE_SVC 0x13
+#define I_BIT 0x80
+
+/*
+ * use bad_save_user_regs for abort/prefetch/undef/swi ...
+ * use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling
+ */
+
+ .macro bad_save_user_regs
+ sub sp, sp, #S_FRAME_SIZE
+ stmia sp, {r0 - r12} @ Calling r0-r12
+ add r8, sp, #S_PC
+
+ ldr r2, _armboot_end
+ add r2, r2, #CONFIG_STACKSIZE
+ sub r2, r2, #8
+ ldmia r2, {r2 - r4} @ get pc, cpsr, old_r0
+ add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
+
+ add r5, sp, #S_SP
+ mov r1, lr
+ stmia r5, {r0 - r4} @ save sp_SVC, lr_SVC, pc, cpsr, old_r
+ mov r0, sp
+ .endm
+
+ .macro irq_save_user_regs
+ sub sp, sp, #S_FRAME_SIZE
+ stmia sp, {r0 - r12} @ Calling r0-r12
+ add r8, sp, #S_PC
+ stmdb r8, {sp, lr}^ @ Calling SP, LR
+ str lr, [r8, #0] @ Save calling PC
+ mrs r6, spsr
+ str r6, [r8, #4] @ Save CPSR
+ str r0, [r8, #8] @ Save OLD_R0
+ mov r0, sp
+ .endm
+
+ .macro irq_restore_user_regs
+ ldmia sp, {r0 - lr}^ @ Calling r0 - lr
+ mov r0, r0
+ ldr lr, [sp, #S_PC] @ Get PC
+ add sp, sp, #S_FRAME_SIZE
+ subs pc, lr, #4 @ return & move spsr_svc into cpsr
+ .endm
+
+ .macro get_bad_stack
+ ldr r13, _armboot_end @ setup our mode stack
+ add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack
+ sub r13, r13, #8
+
+ str lr, [r13] @ save caller lr / spsr
+ mrs lr, spsr
+ str lr, [r13, #4]
+
+ mov r13, #MODE_SVC @ prepare SVC-Mode
+ @ msr spsr_c, r13
+ msr spsr, r13
+ mov lr, pc
+ movs pc, lr
+ .endm
+
+ .macro get_irq_stack @ setup IRQ stack
+ ldr sp, IRQ_STACK_START
+ .endm
+
+ .macro get_fiq_stack @ setup FIQ stack
+ ldr sp, FIQ_STACK_START
+ .endm
+
+/*
+ * exception handlers
+ */
+ .align 5
+undefined_instruction:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_undefined_instruction
+
+ .align 5
+software_interrupt:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_software_interrupt
+
+ .align 5
+prefetch_abort:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_prefetch_abort
+
+ .align 5
+data_abort:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_data_abort
+
+ .align 5
+not_used:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_not_used
+
+#ifdef CONFIG_USE_IRQ
+
+ .align 5
+irq:
+ get_irq_stack
+ irq_save_user_regs
+ bl do_irq
+ irq_restore_user_regs
+
+ .align 5
+fiq:
+ get_fiq_stack
+ /* someone ought to write a more effiction fiq_save_user_regs */
+ irq_save_user_regs
+ bl do_fiq
+ irq_restore_user_regs
+
+#else
+
+ .align 5
+irq:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_irq
+
+ .align 5
+fiq:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_fiq
+
+#endif
+
+ .align 5
+.globl reset_cpu
+reset_cpu:
+#ifdef CONFIG_S3C2400
+ bl disable_interrupts
+ ldr r1, _rWTCON
+ ldr r2, _rWTCNT
+ /* Disable watchdog */
+ mov r3, #0x0000
+ str r3, [r1]
+ /* Initialize watchdog timer count register */
+ mov r3, #0x0001
+ str r3, [r2]
+ /* Enable watchdog timer; assert reset at timer timeout */
+ mov r3, #0x0021
+ str r3, [r1]
+_loop_forever:
+ b _loop_forever
+_rWTCON:
+ .word 0x15300000
+_rWTCNT:
+ .word 0x15300008
+#else /* ! CONFIG_S3C2400 */
+ mov ip, #0
+ mcr p15, 0, ip, c7, c7, 0 @ invalidate cache
+ mcr p15, 0, ip, c8, c7, 0 @ flush TLB (v4)
+ mrc p15, 0, ip, c1, c0, 0 @ get ctrl register
+ bic ip, ip, #0x000f @ ............wcam
+ bic ip, ip, #0x2100 @ ..v....s........
+ mcr p15, 0, ip, c1, c0, 0 @ ctrl register
+ mov pc, r0
+#endif /* CONFIG_S3C2400 */
diff --git a/cpu/mpc8260/ether_scc.c b/cpu/mpc8260/ether_scc.c
new file mode 100644
index 0000000..ff164fe
--- /dev/null
+++ b/cpu/mpc8260/ether_scc.c
@@ -0,0 +1,358 @@
+/*
+ * MPC8260 SCC Ethernet
+ *
+ * Copyright (c) 2000 MontaVista Software, Inc. Dan Malek (dmalek@jlc.net)
+ *
+ * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright (c) 2001
+ * Advent Networks, Inc. <http://www.adventnetworks.com>
+ * Jay Monkman <jtm@smoothsmoothie.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/cpm_8260.h>
+#include <mpc8260.h>
+#include <net.h>
+#include <command.h>
+#include <config.h>
+
+#if defined(CONFIG_ETHER_ON_SCC) && (CONFIG_COMMANDS & CFG_CMD_NET)
+
+#if (CONFIG_ETHER_INDEX == 1)
+# define PROFF_ENET PROFF_SCC1
+# define CPM_CR_ENET_PAGE CPM_CR_SCC1_PAGE
+# define CPM_CR_ENET_SBLOCK CPM_CR_SCC1_SBLOCK
+# define CMXSCR_MASK (CMXSCR_SC1 |\
+ CMXSCR_RS1CS_MSK |\
+ CMXSCR_TS1CS_MSK)
+
+#elif (CONFIG_ETHER_INDEX == 2)
+# define PROFF_ENET PROFF_SCC2
+# define CPM_CR_ENET_PAGE CPM_CR_SCC2_PAGE
+# define CPM_CR_ENET_SBLOCK CPM_CR_SCC2_SBLOCK
+# define CMXSCR_MASK (CMXSCR_SC2 |\
+ CMXSCR_RS2CS_MSK |\
+ CMXSCR_TS2CS_MSK)
+
+#elif (CONFIG_ETHER_INDEX == 3)
+# define PROFF_ENET PROFF_SCC3
+# define CPM_CR_ENET_PAGE CPM_CR_SCC3_PAGE
+# define CPM_CR_ENET_SBLOCK CPM_CR_SCC3_SBLOCK
+# define CMXSCR_MASK (CMXSCR_SC3 |\
+ CMXSCR_RS3CS_MSK |\
+ CMXSCR_TS3CS_MSK)
+#elif (CONFIG_ETHER_INDEX == 4)
+# define PROFF_ENET PROFF_SCC4
+# define CPM_CR_ENET_PAGE CPM_CR_SCC4_PAGE
+# define CPM_CR_ENET_SBLOCK CPM_CR_SCC4_SBLOCK
+# define CMXSCR_MASK (CMXSCR_SC4 |\
+ CMXSCR_RS4CS_MSK |\
+ CMXSCR_TS4CS_MSK)
+
+#endif
+
+
+/* Ethernet Transmit and Receive Buffers */
+#define DBUF_LENGTH 1520
+
+#define TX_BUF_CNT 2
+
+#define TOUT_LOOP 1000000
+
+static char txbuf[TX_BUF_CNT][ DBUF_LENGTH ];
+
+static uint rxIdx; /* index of the current RX buffer */
+static uint txIdx; /* index of the current TX buffer */
+
+/*
+ * SCC Ethernet Tx and Rx buffer descriptors allocated at the
+ * immr->udata_bd address on Dual-Port RAM
+ * Provide for Double Buffering
+ */
+
+typedef volatile struct CommonBufferDescriptor {
+ cbd_t rxbd[PKTBUFSRX]; /* Rx BD */
+ cbd_t txbd[TX_BUF_CNT]; /* Tx BD */
+} RTXBD;
+
+static RTXBD *rtx;
+
+
+int eth_send(volatile void *packet, int length)
+{
+ int i;
+ int result = 0;
+
+ if (length <= 0) {
+ printf("scc: bad packet size: %d\n", length);
+ goto out;
+ }
+
+ for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
+ if (i >= TOUT_LOOP) {
+ printf("scc: tx buffer not ready\n");
+ goto out;
+ }
+ }
+
+ rtx->txbd[txIdx].cbd_bufaddr = (uint)packet;
+ rtx->txbd[txIdx].cbd_datlen = length;
+ rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST |
+ BD_ENET_TX_WRAP);
+
+ for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
+ if (i >= TOUT_LOOP) {
+ printf("scc: tx error\n");
+ goto out;
+ }
+ }
+
+ /* return only status bits */
+ result = rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS;
+
+ out:
+ return result;
+}
+
+
+int eth_rx(void)
+{
+ int length;
+
+ for (;;)
+ {
+ if (rtx->rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) {
+ length = -1;
+ break; /* nothing received - leave for() loop */
+ }
+
+ length = rtx->rxbd[rxIdx].cbd_datlen;
+
+ if (rtx->rxbd[rxIdx].cbd_sc & 0x003f)
+ {
+ printf("err: %x\n", rtx->rxbd[rxIdx].cbd_sc);
+ }
+ else
+ {
+ /* Pass the packet up to the protocol layers. */
+ NetReceive(NetRxPackets[rxIdx], length - 4);
+ }
+
+
+ /* Give the buffer back to the SCC. */
+ rtx->rxbd[rxIdx].cbd_datlen = 0;
+
+ /* wrap around buffer index when necessary */
+ if ((rxIdx + 1) >= PKTBUFSRX) {
+ rtx->rxbd[PKTBUFSRX - 1].cbd_sc = (BD_ENET_RX_WRAP |
+ BD_ENET_RX_EMPTY);
+ rxIdx = 0;
+ }
+ else {
+ rtx->rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY;
+ rxIdx++;
+ }
+ }
+ return length;
+}
+
+/**************************************************************
+ *
+ * SCC Ethernet Initialization Routine
+ *
+ *************************************************************/
+
+int eth_init(bd_t *bis)
+{
+ int i;
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ scc_enet_t *pram_ptr;
+ uint dpaddr;
+
+ rxIdx = 0;
+ txIdx = 0;
+
+ /* assign static pointer to BD area */
+ dpaddr = m8260_cpm_dpalloc(sizeof(RTXBD) + 2, 16);
+ rtx = (RTXBD *)&immr->im_dprambase[dpaddr];
+
+ /* 24.21 - (1-3): ioports have been set up already */
+
+ /* 24.21 - (4,5): connect SCC's tx and rx clocks, use NMSI for SCC */
+ immr->im_cpmux.cmx_uar = 0;
+ immr->im_cpmux.cmx_scr = ( (immr->im_cpmux.cmx_scr & ~CMXSCR_MASK) |
+ CFG_CMXSCR_VALUE);
+
+
+ /* 24.21 (6) write RBASE and TBASE to parameter RAM */
+ pram_ptr = (scc_enet_t *)&(immr->im_dprambase[PROFF_ENET]);
+ pram_ptr->sen_genscc.scc_rbase = (unsigned int)(&rtx->rxbd[0]);
+ pram_ptr->sen_genscc.scc_tbase = (unsigned int)(&rtx->txbd[0]);
+
+ pram_ptr->sen_genscc.scc_rfcr = 0x18; /* Nrml Ops and Mot byte ordering */
+ pram_ptr->sen_genscc.scc_tfcr = 0x18; /* Mot byte ordering, Nrml access */
+
+ pram_ptr->sen_genscc.scc_mrblr = DBUF_LENGTH; /* max. package len 1520 */
+
+ pram_ptr->sen_cpres = ~(0x0); /* Preset CRC */
+ pram_ptr->sen_cmask = 0xdebb20e3; /* Constant Mask for CRC */
+
+
+ /* 24.21 - (7): Write INIT RX AND TX PARAMETERS to CPCR */
+ while(immr->im_cpm.cp_cpcr & CPM_CR_FLG);
+ immr->im_cpm.cp_cpcr = mk_cr_cmd(CPM_CR_ENET_PAGE,
+ CPM_CR_ENET_SBLOCK,
+ 0x0c,
+ CPM_CR_INIT_TRX) | CPM_CR_FLG;
+
+ /* 24.21 - (8-18): Set up parameter RAM */
+ pram_ptr->sen_crcec = 0x0; /* Error Counter CRC (unused) */
+ pram_ptr->sen_alec = 0x0; /* Align Error Counter (unused) */
+ pram_ptr->sen_disfc = 0x0; /* Discard Frame Counter (unused) */
+
+ pram_ptr->sen_pads = 0x8888; /* Short Frame PAD Characters */
+
+ pram_ptr->sen_retlim = 15; /* Retry Limit Threshold */
+
+ pram_ptr->sen_maxflr = 1518; /* MAX Frame Length Register */
+ pram_ptr->sen_minflr = 64; /* MIN Frame Length Register */
+
+ pram_ptr->sen_maxd1 = DBUF_LENGTH; /* MAX DMA1 Length Register */
+ pram_ptr->sen_maxd2 = DBUF_LENGTH; /* MAX DMA2 Length Register */
+
+ pram_ptr->sen_gaddr1 = 0x0; /* Group Address Filter 1 (unused) */
+ pram_ptr->sen_gaddr2 = 0x0; /* Group Address Filter 2 (unused) */
+ pram_ptr->sen_gaddr3 = 0x0; /* Group Address Filter 3 (unused) */
+ pram_ptr->sen_gaddr4 = 0x0; /* Group Address Filter 4 (unused) */
+
+# define ea bis->bi_enetaddr
+ pram_ptr->sen_paddrh = (ea[5] << 8) + ea[4];
+ pram_ptr->sen_paddrm = (ea[3] << 8) + ea[2];
+ pram_ptr->sen_paddrl = (ea[1] << 8) + ea[0];
+# undef ea
+
+ pram_ptr->sen_pper = 0x0; /* Persistence (unused) */
+
+ pram_ptr->sen_iaddr1 = 0x0; /* Individual Address Filter 1 (unused) */
+ pram_ptr->sen_iaddr2 = 0x0; /* Individual Address Filter 2 (unused) */
+ pram_ptr->sen_iaddr3 = 0x0; /* Individual Address Filter 3 (unused) */
+ pram_ptr->sen_iaddr4 = 0x0; /* Individual Address Filter 4 (unused) */
+
+ pram_ptr->sen_taddrh = 0x0; /* Tmp Address (MSB) (unused) */
+ pram_ptr->sen_taddrm = 0x0; /* Tmp Address (unused) */
+ pram_ptr->sen_taddrl = 0x0; /* Tmp Address (LSB) (unused) */
+
+
+ /* 24.21 - (19): Initialize RxBD */
+ for (i = 0; i < PKTBUFSRX; i++)
+ {
+ rtx->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY;
+ rtx->rxbd[i].cbd_datlen = 0; /* Reset */
+ rtx->rxbd[i].cbd_bufaddr = (uint)NetRxPackets[i];
+ }
+
+ rtx->rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP;
+
+ /* 24.21 - (20): Initialize TxBD */
+ for (i = 0; i < TX_BUF_CNT; i++)
+ {
+ rtx->txbd[i].cbd_sc = (BD_ENET_TX_PAD |
+ BD_ENET_TX_LAST |
+ BD_ENET_TX_TC);
+ rtx->txbd[i].cbd_datlen = 0; /* Reset */
+ rtx->txbd[i].cbd_bufaddr = (uint)&txbuf[i][0];
+ }
+
+ rtx->txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP;
+
+ /* 24.21 - (21): Write 0xffff to SCCE */
+ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_scce = ~(0x0);
+
+ /* 24.21 - (22): Write to SCCM to enable TXE, RXF, TXB events */
+ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_sccm = (SCCE_ENET_TXE |
+ SCCE_ENET_RXF |
+ SCCE_ENET_TXB);
+
+ /* 24.21 - (23): we don't use ethernet interrupts */
+
+ /* 24.21 - (24): Clear GSMR_H to enable normal operations */
+ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrh = 0;
+
+ /* 24.21 - (25): Clear GSMR_L to enable normal operations */
+ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl = (SCC_GSMRL_TCI |
+ SCC_GSMRL_TPL_48 |
+ SCC_GSMRL_TPP_10 |
+ SCC_GSMRL_MODE_ENET);
+
+ /* 24.21 - (26): Initialize DSR */
+ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_dsr = 0xd555;
+
+ /* 24.21 - (27): Initialize PSMR2
+ *
+ * Settings:
+ * CRC = 32-Bit CCITT
+ * NIB = Begin searching for SFD 22 bits after RENA
+ * FDE = Full Duplex Enable
+ * BRO = Reject broadcast packets
+ * PROMISCOUS = Catch all packets regardless of dest. MAC adress
+ */
+ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_psmr = SCC_PSMR_ENCRC |
+ SCC_PSMR_NIB22 |
+#if defined(CONFIG_SCC_ENET_FULL_DUPLEX)
+ SCC_PSMR_FDE |
+#endif
+#if defined(CONFIG_SCC_ENET_NO_BROADCAST)
+ SCC_PSMR_BRO |
+#endif
+#if defined(CONFIG_SCC_ENET_PROMISCOUS)
+ SCC_PSMR_PRO |
+#endif
+ 0;
+
+ /* 24.21 - (28): Write to GSMR_L to enable SCC */
+ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR |
+ SCC_GSMRL_ENT);
+
+ return 1;
+}
+
+
+
+void eth_halt(void)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl &= ~(SCC_GSMRL_ENR |
+ SCC_GSMRL_ENT);
+}
+
+#if 0
+void restart(void)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ immr->im_cpm.cp_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR |
+ SCC_GSMRL_ENT);
+}
+#endif
+
+#endif /* CONFIG_ETHER_ON_SCC && CFG_CMD_NET */
+
diff --git a/cpu/ppc4xx/kgdb.S b/cpu/ppc4xx/kgdb.S
new file mode 100644
index 0000000..78681cd
--- /dev/null
+++ b/cpu/ppc4xx/kgdb.S
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2000 Murray Jensen <Murray.Jensen@cmst.csiro.au>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <command.h>
+#include <ppc4xx.h>
+#include <version.h>
+
+#define CONFIG_405GP 1 /* needed for Linux kernel header files */
+#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#include <asm/cache.h>
+#include <asm/mmu.h>
+
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+ /*
+ * cache flushing routines for kgdb
+ */
+
+ .globl kgdb_flush_cache_all
+kgdb_flush_cache_all:
+ /* icache */
+ iccci r0,r0 /* iccci invalidates the entire I cache */
+ /* dcache */
+ addi r6,0,0x0000 /* clear GPR 6 */
+ addi r7,r0, 128 /* do loop for # of dcache lines */
+ /* NOTE: dccci invalidates both */
+ mtctr r7 /* ways in the D cache */
+..dcloop:
+ dccci 0,r6 /* invalidate line */
+ addi r6,r6, 32 /* bump to next line */
+ bdnz ..dcloop
+ blr
+
+ .globl kgdb_flush_cache_range
+kgdb_flush_cache_range:
+ li r5,CFG_CACHELINE_SIZE-1
+ andc r3,r3,r5
+ subf r4,r3,r4
+ add r4,r4,r5
+ srwi. r4,r4,CFG_CACHELINE_SHIFT
+ beqlr
+ mtctr r4
+ mr r6,r3
+1: dcbst 0,r3
+ addi r3,r3,CFG_CACHELINE_SIZE
+ bdnz 1b
+ sync /* wait for dcbst's to get to ram */
+ mtctr r4
+2: icbi 0,r6
+ addi r6,r6,CFG_CACHELINE_SIZE
+ bdnz 2b
+ SYNC
+ blr
+
+#endif /* CFG_CMD_KGDB */
diff --git a/cpu/ppc4xx/resetvec.S b/cpu/ppc4xx/resetvec.S
new file mode 100644
index 0000000..5350225
--- /dev/null
+++ b/cpu/ppc4xx/resetvec.S
@@ -0,0 +1,10 @@
+/* Copyright MontaVista Software Incorporated, 2000 */
+
+
+ .section .resetvec,"ax"
+#if defined(CONFIG_440)
+ b _start_440
+#else
+ b _start
+#endif
+
diff --git a/cpu/ppc4xx/serial.c b/cpu/ppc4xx/serial.c
new file mode 100644
index 0000000..d02ff2f
--- /dev/null
+++ b/cpu/ppc4xx/serial.c
@@ -0,0 +1,808 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+/*------------------------------------------------------------------------------+ */
+/*
+ * This source code has been made available to you by IBM on an AS-IS
+ * basis. Anyone receiving this source is licensed under IBM
+ * copyrights to use it in any way he or she deems fit, including
+ * copying it, modifying it, compiling it, and redistributing it either
+ * with or without modifications. No license under IBM patents or
+ * patent applications is to be implied by the copyright license.
+ *
+ * Any user of this software should understand that IBM cannot provide
+ * technical support for this software and will not be responsible for
+ * any consequences resulting from the use of this software.
+ *
+ * Any person who transfers this source code or any derivative work
+ * must include the IBM copyright notice, this paragraph, and the
+ * preceding two paragraphs in the transferred software.
+ *
+ * COPYRIGHT I B M CORPORATION 1995
+ * LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
+ */
+/*------------------------------------------------------------------------------- */
+
+#include <common.h>
+#include <commproc.h>
+#include <asm/processor.h>
+#include <watchdog.h>
+#include "vecnum.h"
+
+#if CONFIG_SERIAL_SOFTWARE_FIFO
+#include <malloc.h>
+#endif
+
+/*****************************************************************************/
+#ifdef CONFIG_IOP480
+
+#define SPU_BASE 0x40000000
+
+#define spu_LineStat_rc 0x00 /* Line Status Register (Read/Clear) */
+#define spu_LineStat_w 0x04 /* Line Status Register (Set) */
+#define spu_Handshk_rc 0x08 /* Handshake Status Register (Read/Clear) */
+#define spu_Handshk_w 0x0c /* Handshake Status Register (Set) */
+#define spu_BRateDivh 0x10 /* Baud rate divisor high */
+#define spu_BRateDivl 0x14 /* Baud rate divisor low */
+#define spu_CtlReg 0x18 /* Control Register */
+#define spu_RxCmd 0x1c /* Rx Command Register */
+#define spu_TxCmd 0x20 /* Tx Command Register */
+#define spu_RxBuff 0x24 /* Rx data buffer */
+#define spu_TxBuff 0x24 /* Tx data buffer */
+
+/*-----------------------------------------------------------------------------+
+ | Line Status Register.
+ +-----------------------------------------------------------------------------*/
+#define asyncLSRport1 0x40000000
+#define asyncLSRport1set 0x40000004
+#define asyncLSRDataReady 0x80
+#define asyncLSRFramingError 0x40
+#define asyncLSROverrunError 0x20
+#define asyncLSRParityError 0x10
+#define asyncLSRBreakInterrupt 0x08
+#define asyncLSRTxHoldEmpty 0x04
+#define asyncLSRTxShiftEmpty 0x02
+
+/*-----------------------------------------------------------------------------+
+ | Handshake Status Register.
+ +-----------------------------------------------------------------------------*/
+#define asyncHSRport1 0x40000008
+#define asyncHSRport1set 0x4000000c
+#define asyncHSRDsr 0x80
+#define asyncLSRCts 0x40
+
+/*-----------------------------------------------------------------------------+
+ | Control Register.
+ +-----------------------------------------------------------------------------*/
+#define asyncCRport1 0x40000018
+#define asyncCRNormal 0x00
+#define asyncCRLoopback 0x40
+#define asyncCRAutoEcho 0x80
+#define asyncCRDtr 0x20
+#define asyncCRRts 0x10
+#define asyncCRWordLength7 0x00
+#define asyncCRWordLength8 0x08
+#define asyncCRParityDisable 0x00
+#define asyncCRParityEnable 0x04
+#define asyncCREvenParity 0x00
+#define asyncCROddParity 0x02
+#define asyncCRStopBitsOne 0x00
+#define asyncCRStopBitsTwo 0x01
+#define asyncCRDisableDtrRts 0x00
+
+/*-----------------------------------------------------------------------------+
+ | Receiver Command Register.
+ +-----------------------------------------------------------------------------*/
+#define asyncRCRport1 0x4000001c
+#define asyncRCRDisable 0x00
+#define asyncRCREnable 0x80
+#define asyncRCRIntDisable 0x00
+#define asyncRCRIntEnabled 0x20
+#define asyncRCRDMACh2 0x40
+#define asyncRCRDMACh3 0x60
+#define asyncRCRErrorInt 0x10
+#define asyncRCRPauseEnable 0x08
+
+/*-----------------------------------------------------------------------------+
+ | Transmitter Command Register.
+ +-----------------------------------------------------------------------------*/
+#define asyncTCRport1 0x40000020
+#define asyncTCRDisable 0x00
+#define asyncTCREnable 0x80
+#define asyncTCRIntDisable 0x00
+#define asyncTCRIntEnabled 0x20
+#define asyncTCRDMACh2 0x40
+#define asyncTCRDMACh3 0x60
+#define asyncTCRTxEmpty 0x10
+#define asyncTCRErrorInt 0x08
+#define asyncTCRStopPause 0x04
+#define asyncTCRBreakGen 0x02
+
+/*-----------------------------------------------------------------------------+
+ | Miscellanies defines.
+ +-----------------------------------------------------------------------------*/
+#define asyncTxBufferport1 0x40000024
+#define asyncRxBufferport1 0x40000024
+#define asyncDLABLsbport1 0x40000014
+#define asyncDLABMsbport1 0x40000010
+#define asyncXOFFchar 0x13
+#define asyncXONchar 0x11
+
+
+/*
+ * Minimal serial functions needed to use one of the SMC ports
+ * as serial console interface.
+ */
+
+int serial_init (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ volatile char val;
+ unsigned short br_reg;
+
+ br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1);
+
+ /*
+ * Init onboard UART
+ */
+ out8 (SPU_BASE + spu_LineStat_rc, 0x78); /* Clear all bits in Line Status Reg */
+ out8 (SPU_BASE + spu_BRateDivl, (br_reg & 0x00ff)); /* Set baud rate divisor... */
+ out8 (SPU_BASE + spu_BRateDivh, ((br_reg & 0xff00) >> 8)); /* ... */
+ out8 (SPU_BASE + spu_CtlReg, 0x08); /* Set 8 bits, no parity and 1 stop bit */
+ out8 (SPU_BASE + spu_RxCmd, 0xb0); /* Enable Rx */
+ out8 (SPU_BASE + spu_TxCmd, 0x9c); /* Enable Tx */
+ out8 (SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
+ val = in8 (SPU_BASE + spu_RxBuff); /* Dummy read, to clear receiver */
+
+ return (0);
+}
+
+
+void serial_setbrg (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ unsigned short br_reg;
+
+ br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1);
+
+ out8 (SPU_BASE + spu_BRateDivl, (br_reg & 0x00ff)); /* Set baud rate divisor... */
+ out8 (SPU_BASE + spu_BRateDivh, ((br_reg & 0xff00) >> 8)); /* ... */
+}
+
+
+void serial_putc (const char c)
+{
+ if (c == '\n')
+ serial_putc ('\r');
+
+ /* load status from handshake register */
+ if (in8 (SPU_BASE + spu_Handshk_rc) != 00)
+ out8 (SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
+
+ out8 (SPU_BASE + spu_TxBuff, c); /* Put char */
+
+ while ((in8 (SPU_BASE + spu_LineStat_rc) & 04) != 04) {
+ if (in8 (SPU_BASE + spu_Handshk_rc) != 00)
+ out8 (SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
+ }
+}
+
+
+void serial_puts (const char *s)
+{
+ while (*s) {
+ serial_putc (*s++);
+ }
+}
+
+
+int serial_getc ()
+{
+ unsigned char status = 0;
+
+ while (1) {
+ status = in8 (asyncLSRport1);
+ if ((status & asyncLSRDataReady) != 0x0) {
+ break;
+ }
+ if ((status & ( asyncLSRFramingError |
+ asyncLSROverrunError |
+ asyncLSRParityError |
+ asyncLSRBreakInterrupt )) != 0) {
+ (void) out8 (asyncLSRport1,
+ asyncLSRFramingError |
+ asyncLSROverrunError |
+ asyncLSRParityError |
+ asyncLSRBreakInterrupt );
+ }
+ }
+ return (0x000000ff & (int) in8 (asyncRxBufferport1));
+}
+
+
+int serial_tstc ()
+{
+ unsigned char status;
+
+ status = in8 (asyncLSRport1);
+ if ((status & asyncLSRDataReady) != 0x0) {
+ return (1);
+ }
+ if ((status & ( asyncLSRFramingError |
+ asyncLSROverrunError |
+ asyncLSRParityError |
+ asyncLSRBreakInterrupt )) != 0) {
+ (void) out8 (asyncLSRport1,
+ asyncLSRFramingError |
+ asyncLSROverrunError |
+ asyncLSRParityError |
+ asyncLSRBreakInterrupt);
+ }
+ return 0;
+}
+
+#endif /* CONFIG_IOP480 */
+
+
+/*****************************************************************************/
+#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440)
+
+#if defined(CONFIG_440)
+#define UART0_BASE CFG_PERIPHERAL_BASE + 0x00000200
+#define UART1_BASE CFG_PERIPHERAL_BASE + 0x00000300
+#define CR0_MASK 0x3fff0000
+#define CR0_EXTCLK_ENA 0x00600000
+#define CR0_UDIV_POS 16
+#else
+#define UART_BASE_PTR 0xF800FFFC; /* pointer to uart base */
+#define UART0_BASE 0xef600300
+#define UART1_BASE 0xef600400
+#define CR0_MASK 0x00001fff
+#define CR0_EXTCLK_ENA 0x00000c00
+#define CR0_UDIV_POS 1
+#endif
+
+#define UART_RBR 0x00
+#define UART_THR 0x00
+#define UART_IER 0x01
+#define UART_IIR 0x02
+#define UART_FCR 0x02
+#define UART_LCR 0x03
+#define UART_MCR 0x04
+#define UART_LSR 0x05
+#define UART_MSR 0x06
+#define UART_SCR 0x07
+#define UART_DLL 0x00
+#define UART_DLM 0x01
+
+/*-----------------------------------------------------------------------------+
+ | Line Status Register.
+ +-----------------------------------------------------------------------------*/
+/*#define asyncLSRport1 UART0_BASE+0x05 */
+#define asyncLSRDataReady1 0x01
+#define asyncLSROverrunError1 0x02
+#define asyncLSRParityError1 0x04
+#define asyncLSRFramingError1 0x08
+#define asyncLSRBreakInterrupt1 0x10
+#define asyncLSRTxHoldEmpty1 0x20
+#define asyncLSRTxShiftEmpty1 0x40
+#define asyncLSRRxFifoError1 0x80
+
+/*-----------------------------------------------------------------------------+
+ | Miscellanies defines.
+ +-----------------------------------------------------------------------------*/
+/*#define asyncTxBufferport1 UART0_BASE+0x00 */
+/*#define asyncRxBufferport1 UART0_BASE+0x00 */
+
+
+#if CONFIG_SERIAL_SOFTWARE_FIFO
+/*-----------------------------------------------------------------------------+
+ | Fifo
+ +-----------------------------------------------------------------------------*/
+typedef struct {
+ char *rx_buffer;
+ ulong rx_put;
+ ulong rx_get;
+} serial_buffer_t;
+
+volatile static serial_buffer_t buf_info;
+#endif
+
+
+#if defined(CONFIG_440) && !defined(CFG_EXT_SERIAL_CLOCK)
+static void serial_divs (int baudrate, unsigned long *pudiv,
+ unsigned short *pbdiv )
+{
+ sys_info_t sysinfo;
+ unsigned long div; /* total divisor udiv * bdiv */
+ unsigned long umin; /* minimum udiv */
+ unsigned short diff; /* smallest diff */
+ unsigned long udiv; /* best udiv */
+
+ unsigned short idiff; /* current diff */
+ unsigned short ibdiv; /* current bdiv */
+ unsigned long i;
+ unsigned long est; /* current estimate */
+
+ get_sys_info( &sysinfo );
+
+ udiv = 32; /* Assume lowest possible serial clk */
+ div = sysinfo.freqPLB/(16*baudrate); /* total divisor */
+ umin = sysinfo.pllOpbDiv<<1; /* 2 x OPB divisor */
+ diff = 32; /* highest possible */
+
+ /* i is the test udiv value -- start with the largest
+ * possible (32) to minimize serial clock and constrain
+ * search to umin.
+ */
+ for( i = 32; i > umin; i-- ){
+ ibdiv = div/i;
+ est = i * ibdiv;
+ idiff = (est > div) ? (est-div) : (div-est);
+ if( idiff == 0 ){
+ udiv = i;
+ break; /* can't do better */
+ }
+ else if( idiff < diff ){
+ udiv = i; /* best so far */
+ diff = idiff; /* update lowest diff*/
+ }
+ }
+
+ *pudiv = udiv;
+ *pbdiv = div/udiv;
+
+}
+#endif /* defined(CONFIG_440) && !defined(CFG_EXT_SERIAL_CLK */
+
+
+/*
+ * Minimal serial functions needed to use one of the SMC ports
+ * as serial console interface.
+ */
+
+#if defined(CONFIG_440)
+int serial_init (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ unsigned long reg;
+ unsigned long udiv;
+ unsigned short bdiv;
+ volatile char val;
+#ifdef CFG_EXT_SERIAL_CLOCK
+ unsigned long tmp;
+#endif
+
+ reg = mfdcr(cntrl0) & ~CR0_MASK;
+#ifdef CFG_EXT_SERIAL_CLOCK
+ reg |= CR0_EXTCLK_ENA;
+ udiv = 1;
+ tmp = gd->baudrate * 16;
+ bdiv = (CFG_EXT_SERIAL_CLOCK + tmp / 2) / tmp;
+#else
+ /* For 440, the cpu clock is on divider chain A, UART on divider
+ * chain B ... so cpu clock is irrelevant. Get the "optimized"
+ * values that are subject to the 1/2 opb clock constraint
+ */
+ serial_divs (gd->baudrate, &udiv, &bdiv);
+#endif
+
+ reg |= (udiv - 1) << CR0_UDIV_POS; /* set the UART divisor */
+ mtdcr (cntrl0, reg);
+
+ out8 (UART0_BASE + UART_LCR, 0x80); /* set DLAB bit */
+ out8 (UART0_BASE + UART_DLL, bdiv); /* set baudrate divisor */
+ out8 (UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */
+ out8 (UART0_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */
+ out8 (UART0_BASE + UART_FCR, 0x00); /* disable FIFO */
+ out8 (UART0_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */
+ val = in8 (UART0_BASE + UART_LSR); /* clear line status */
+ val = in8 (UART0_BASE + UART_RBR); /* read receive buffer */
+ out8 (UART0_BASE + UART_SCR, 0x00); /* set scratchpad */
+ out8 (UART0_BASE + UART_IER, 0x00); /* set interrupt enable reg */
+
+ return (0);
+}
+
+#else /* !defined(CONFIG_440) */
+
+int serial_init (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ unsigned long reg;
+ unsigned long tmp;
+ unsigned long clk;
+ unsigned long udiv;
+ unsigned short bdiv;
+ volatile char val;
+
+ reg = mfdcr(cntrl0) & ~CR0_MASK;
+#ifdef CFG_EXT_SERIAL_CLOCK
+ clk = CFG_EXT_SERIAL_CLOCK;
+ udiv = 1;
+ reg |= CR0_EXTCLK_ENA;
+#else
+ clk = gd->cpu_clk;
+#ifdef CFG_405_UART_ERRATA_59
+ udiv = 31; /* Errata 59: stuck at 31 */
+#else
+ tmp = CFG_BASE_BAUD * 16;
+ udiv = (clk + tmp / 2) / tmp;
+#endif
+#endif
+
+ reg |= (udiv - 1) << CR0_UDIV_POS; /* set the UART divisor */
+ mtdcr (cntrl0, reg);
+
+ tmp = gd->baudrate * udiv * 16;
+ bdiv = (clk + tmp / 2) / tmp;
+
+ out8 (UART0_BASE + UART_LCR, 0x80); /* set DLAB bit */
+ out8 (UART0_BASE + UART_DLL, bdiv); /* set baudrate divisor */
+ out8 (UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */
+ out8 (UART0_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */
+ out8 (UART0_BASE + UART_FCR, 0x00); /* disable FIFO */
+ out8 (UART0_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */
+ val = in8 (UART0_BASE + UART_LSR); /* clear line status */
+ val = in8 (UART0_BASE + UART_RBR); /* read receive buffer */
+ out8 (UART0_BASE + UART_SCR, 0x00); /* set scratchpad */
+ out8 (UART0_BASE + UART_IER, 0x00); /* set interrupt enable reg */
+
+ return (0);
+}
+
+#endif /* if defined(CONFIG_440) */
+
+void serial_setbrg (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ unsigned long tmp;
+ unsigned long clk;
+ unsigned long udiv;
+ unsigned short bdiv;
+
+#ifdef CFG_EXT_SERIAL_CLOCK
+ clk = CFG_EXT_SERIAL_CLOCK;
+#else
+ clk = gd->cpu_clk;
+#endif
+ udiv = ((mfdcr (cntrl0) & 0x3e) >> 1) + 1;
+ tmp = gd->baudrate * udiv * 16;
+ bdiv = (clk + tmp / 2) / tmp;
+
+ out8 (UART0_BASE + UART_LCR, 0x80); /* set DLAB bit */
+ out8 (UART0_BASE + UART_DLL, bdiv); /* set baudrate divisor */
+ out8 (UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */
+ out8 (UART0_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */
+}
+
+
+void serial_putc (const char c)
+{
+ int i;
+
+ if (c == '\n')
+ serial_putc ('\r');
+
+ /* check THRE bit, wait for transmiter available */
+ for (i = 1; i < 3500; i++) {
+ if ((in8 (UART0_BASE + UART_LSR) & 0x20) == 0x20)
+ break;
+ udelay (100);
+ }
+ out8 (UART0_BASE + UART_THR, c); /* put character out */
+}
+
+
+void serial_puts (const char *s)
+{
+ while (*s) {
+ serial_putc (*s++);
+ }
+}
+
+
+int serial_getc ()
+{
+ unsigned char status = 0;
+
+ while (1) {
+#if defined(CONFIG_HW_WATCHDOG)
+ WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
+#endif /* CONFIG_HW_WATCHDOG */
+ status = in8 (UART0_BASE + UART_LSR);
+ if ((status & asyncLSRDataReady1) != 0x0) {
+ break;
+ }
+ if ((status & ( asyncLSRFramingError1 |
+ asyncLSROverrunError1 |
+ asyncLSRParityError1 |
+ asyncLSRBreakInterrupt1 )) != 0) {
+ out8 (UART0_BASE + UART_LSR,
+ asyncLSRFramingError1 |
+ asyncLSROverrunError1 |
+ asyncLSRParityError1 |
+ asyncLSRBreakInterrupt1);
+ }
+ }
+ return (0x000000ff & (int) in8 (UART0_BASE));
+}
+
+
+int serial_tstc ()
+{
+ unsigned char status;
+
+ status = in8 (UART0_BASE + UART_LSR);
+ if ((status & asyncLSRDataReady1) != 0x0) {
+ return (1);
+ }
+ if ((status & ( asyncLSRFramingError1 |
+ asyncLSROverrunError1 |
+ asyncLSRParityError1 |
+ asyncLSRBreakInterrupt1 )) != 0) {
+ out8 (UART0_BASE + UART_LSR,
+ asyncLSRFramingError1 |
+ asyncLSROverrunError1 |
+ asyncLSRParityError1 |
+ asyncLSRBreakInterrupt1);
+ }
+ return 0;
+}
+
+
+#if CONFIG_SERIAL_SOFTWARE_FIFO
+
+void serial_isr (void *arg)
+{
+ int space;
+ int c;
+ const int rx_get = buf_info.rx_get;
+ int rx_put = buf_info.rx_put;
+
+ if (rx_get <= rx_put) {
+ space = CONFIG_SERIAL_SOFTWARE_FIFO - (rx_put - rx_get);
+ } else {
+ space = rx_get - rx_put;
+ }
+ while (serial_tstc ()) {
+ c = serial_getc ();
+ if (space) {
+ buf_info.rx_buffer[rx_put++] = c;
+ space--;
+ }
+ if (rx_put == CONFIG_SERIAL_SOFTWARE_FIFO)
+ rx_put = 0;
+ if (space < CONFIG_SERIAL_SOFTWARE_FIFO / 4) {
+ /* Stop flow by setting RTS inactive */
+ out8 (UART0_BASE + UART_MCR,
+ in8 (UART0_BASE + UART_MCR) & (0xFF ^ 0x02));
+ }
+ }
+ buf_info.rx_put = rx_put;
+}
+
+void serial_buffered_init (void)
+{
+ serial_puts ("Switching to interrupt driven serial input mode.\n");
+ buf_info.rx_buffer = malloc (CONFIG_SERIAL_SOFTWARE_FIFO);
+ buf_info.rx_put = 0;
+ buf_info.rx_get = 0;
+
+ if (in8 (UART0_BASE + UART_MSR) & 0x10) {
+ serial_puts ("Check CTS signal present on serial port: OK.\n");
+ } else {
+ serial_puts ("WARNING: CTS signal not present on serial port.\n");
+ }
+
+ irq_install_handler ( VECNUM_U0 /*UART0 */ /*int vec */ ,
+ serial_isr /*interrupt_handler_t *handler */ ,
+ (void *) &buf_info /*void *arg */ );
+
+ /* Enable "RX Data Available" Interrupt on UART */
+ /* out8(UART0_BASE + UART_IER, in8(UART0_BASE + UART_IER) |0x01); */
+ out8 (UART0_BASE + UART_IER, 0x01);
+ /* Set DTR active */
+ out8 (UART0_BASE + UART_MCR, in8 (UART0_BASE + UART_MCR) | 0x01);
+ /* Start flow by setting RTS active */
+ out8 (UART0_BASE + UART_MCR, in8 (UART0_BASE + UART_MCR) | 0x02);
+ /* Setup UART FIFO: RX trigger level: 4 byte, Enable FIFO */
+ out8 (UART0_BASE + UART_FCR, (1 << 6) | 1);
+}
+
+void serial_buffered_putc (const char c)
+{
+ /* Wait for CTS */
+#if defined(CONFIG_HW_WATCHDOG)
+ while (!(in8 (UART0_BASE + UART_MSR) & 0x10))
+ WATCHDOG_RESET ();
+#else
+ while (!(in8 (UART0_BASE + UART_MSR) & 0x10));
+#endif
+ serial_putc (c);
+}
+
+void serial_buffered_puts (const char *s)
+{
+ serial_puts (s);
+}
+
+int serial_buffered_getc (void)
+{
+ int space;
+ int c;
+ int rx_get = buf_info.rx_get;
+ int rx_put;
+
+#if defined(CONFIG_HW_WATCHDOG)
+ while (rx_get == buf_info.rx_put)
+ WATCHDOG_RESET ();
+#else
+ while (rx_get == buf_info.rx_put);
+#endif
+ c = buf_info.rx_buffer[rx_get++];
+ if (rx_get == CONFIG_SERIAL_SOFTWARE_FIFO)
+ rx_get = 0;
+ buf_info.rx_get = rx_get;
+
+ rx_put = buf_info.rx_put;
+ if (rx_get <= rx_put) {
+ space = CONFIG_SERIAL_SOFTWARE_FIFO - (rx_put - rx_get);
+ } else {
+ space = rx_get - rx_put;
+ }
+ if (space > CONFIG_SERIAL_SOFTWARE_FIFO / 2) {
+ /* Start flow by setting RTS active */
+ out8 (UART0_BASE + UART_MCR, in8 (UART0_BASE + UART_MCR) | 0x02);
+ }
+
+ return c;
+}
+
+int serial_buffered_tstc (void)
+{
+ return (buf_info.rx_get != buf_info.rx_put) ? 1 : 0;
+}
+
+#endif /* CONFIG_SERIAL_SOFTWARE_FIFO */
+
+
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+/*
+ AS HARNOIS : according to CONFIG_KGDB_SER_INDEX kgdb uses serial port
+ number 0 or number 1
+ - if CONFIG_KGDB_SER_INDEX = 1 => serial port number 0 :
+ configuration has been already done
+ - if CONFIG_KGDB_SER_INDEX = 2 => serial port number 1 :
+ configure port 1 for serial I/O with rate = CONFIG_KGDB_BAUDRATE
+*/
+#if (CONFIG_KGDB_SER_INDEX & 2)
+void kgdb_serial_init (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ volatile char val;
+ unsigned short br_reg;
+
+ get_clocks ();
+ br_reg = (((((gd->cpu_clk / 16) / 18) * 10) / CONFIG_KGDB_BAUDRATE) +
+ 5) / 10;
+ /*
+ * Init onboard 16550 UART
+ */
+ out8 (UART1_BASE + UART_LCR, 0x80); /* set DLAB bit */
+ out8 (UART1_BASE + UART_DLL, (br_reg & 0x00ff)); /* set divisor for 9600 baud */
+ out8 (UART1_BASE + UART_DLM, ((br_reg & 0xff00) >> 8)); /* set divisor for 9600 baud */
+ out8 (UART1_BASE + UART_LCR, 0x03); /* line control 8 bits no parity */
+ out8 (UART1_BASE + UART_FCR, 0x00); /* disable FIFO */
+ out8 (UART1_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */
+ val = in8 (UART1_BASE + UART_LSR); /* clear line status */
+ val = in8 (UART1_BASE + UART_RBR); /* read receive buffer */
+ out8 (UART1_BASE + UART_SCR, 0x00); /* set scratchpad */
+ out8 (UART1_BASE + UART_IER, 0x00); /* set interrupt enable reg */
+}
+
+
+void putDebugChar (const char c)
+{
+ if (c == '\n')
+ serial_putc ('\r');
+
+ out8 (UART1_BASE + UART_THR, c); /* put character out */
+
+ /* check THRE bit, wait for transfer done */
+ while ((in8 (UART1_BASE + UART_LSR) & 0x20) != 0x20);
+}
+
+
+void putDebugStr (const char *s)
+{
+ while (*s) {
+ serial_putc (*s++);
+ }
+}
+
+
+int getDebugChar (void)
+{
+ unsigned char status = 0;
+
+ while (1) {
+ status = in8 (UART1_BASE + UART_LSR);
+ if ((status & asyncLSRDataReady1) != 0x0) {
+ break;
+ }
+ if ((status & ( asyncLSRFramingError1 |
+ asyncLSROverrunError1 |
+ asyncLSRParityError1 |
+ asyncLSRBreakInterrupt1 )) != 0) {
+ out8 (UART1_BASE + UART_LSR,
+ asyncLSRFramingError1 |
+ asyncLSROverrunError1 |
+ asyncLSRParityError1 |
+ asyncLSRBreakInterrupt1);
+ }
+ }
+ return (0x000000ff & (int) in8 (UART1_BASE));
+}
+
+
+void kgdb_interruptible (int yes)
+{
+ return;
+}
+
+#else /* ! (CONFIG_KGDB_SER_INDEX & 2) */
+
+void kgdb_serial_init (void)
+{
+ serial_printf ("[on serial] ");
+}
+
+void putDebugChar (int c)
+{
+ serial_putc (c);
+}
+
+void putDebugStr (const char *str)
+{
+ serial_puts (str);
+}
+
+int getDebugChar (void)
+{
+ return serial_getc ();
+}
+
+void kgdb_interruptible (int yes)
+{
+ return;
+}
+#endif /* (CONFIG_KGDB_SER_INDEX & 2) */
+#endif /* CFG_CMD_KGDB */
+
+#endif /* CONFIG_405GP || CONFIG_405CR */
diff --git a/cpu/ppc4xx/spd_sdram.c b/cpu/ppc4xx/spd_sdram.c
new file mode 100644
index 0000000..fc0c980
--- /dev/null
+++ b/cpu/ppc4xx/spd_sdram.c
@@ -0,0 +1,1764 @@
+/*
+ * (C) Copyright 2001
+ * Bill Hunter, Wave 7 Optics, williamhunter@attbi.com
+ *
+ * Based on code by:
+ *
+ * Kenneth Johansson ,Ericsson Business Innovation.
+ * kenneth.johansson@inn.ericsson.se
+ *
+ * hacked up by bill hunter. fixed so we could run before
+ * serial_init and console_init. previous version avoided this by
+ * running out of cache memory during serial/console init, then running
+ * this code later.
+ *
+ * (C) Copyright 2002
+ * Jun Gu, Artesyn Technology, jung@artesyncp.com
+ * Support for IBM 440 based on OpenBIOS draminit.c from IBM.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <i2c.h>
+#include <ppc4xx.h>
+
+#ifdef CONFIG_SPD_EEPROM
+
+/*
+ * Set default values
+ */
+#ifndef CFG_I2C_SPEED
+#define CFG_I2C_SPEED 50000
+#endif
+
+#ifndef CFG_I2C_SLAVE
+#define CFG_I2C_SLAVE 0xFE
+#endif
+
+#ifndef CONFIG_440 /* for 405 WALNUT board */
+
+#define SDRAM0_CFG_DCE 0x80000000
+#define SDRAM0_CFG_SRE 0x40000000
+#define SDRAM0_CFG_PME 0x20000000
+#define SDRAM0_CFG_MEMCHK 0x10000000
+#define SDRAM0_CFG_REGEN 0x08000000
+#define SDRAM0_CFG_ECCDD 0x00400000
+#define SDRAM0_CFG_EMDULR 0x00200000
+#define SDRAM0_CFG_DRW_SHIFT (31-6)
+#define SDRAM0_CFG_BRPF_SHIFT (31-8)
+
+#define SDRAM0_TR_CASL_SHIFT (31-8)
+#define SDRAM0_TR_PTA_SHIFT (31-13)
+#define SDRAM0_TR_CTP_SHIFT (31-15)
+#define SDRAM0_TR_LDF_SHIFT (31-17)
+#define SDRAM0_TR_RFTA_SHIFT (31-29)
+#define SDRAM0_TR_RCD_SHIFT (31-31)
+
+#define SDRAM0_RTR_SHIFT (31-15)
+#define SDRAM0_ECCCFG_SHIFT (31-11)
+
+/* SDRAM0_CFG enable macro */
+#define SDRAM0_CFG_BRPF(x) ( ( x & 0x3)<< SDRAM0_CFG_BRPF_SHIFT )
+
+#define SDRAM0_BXCR_SZ_MASK 0x000e0000
+#define SDRAM0_BXCR_AM_MASK 0x0000e000
+
+#define SDRAM0_BXCR_SZ_SHIFT (31-14)
+#define SDRAM0_BXCR_AM_SHIFT (31-18)
+
+#define SDRAM0_BXCR_SZ(x) ( (( x << SDRAM0_BXCR_SZ_SHIFT) & SDRAM0_BXCR_SZ_MASK) )
+#define SDRAM0_BXCR_AM(x) ( (( x << SDRAM0_BXCR_AM_SHIFT) & SDRAM0_BXCR_AM_MASK) )
+
+#ifdef CONFIG_W7O
+# define SPD_ERR(x) do { return 0; } while (0)
+#else
+# define SPD_ERR(x) do { printf(x); hang(); } while (0)
+#endif
+
+/*
+ * what we really want is
+ * (1/hertz) but we don't want to use floats so multiply with 10E9
+ *
+ * The error needs to be on the safe side so we want the floor function.
+ * This means we get an exact value or we calculate that our bus frequency is
+ * a bit faster than it really is and thus we don't progam the sdram controller
+ * to run to fast
+ */
+#define sdram_HZ_to_ns(hertz) (1000000000/(hertz))
+
+/* function prototypes */
+int spd_read(uint addr); /* prototype */
+
+
+/*
+ * This function is reading data from the DIMM module EEPROM over the SPD bus
+ * and uses that to program the sdram controller.
+ *
+ * This works on boards that has the same schematics that the IBM walnut has.
+ *
+ * BUG: Don't handle ECC memory
+ * BUG: A few values in the TR register is currently hardcoded
+ */
+
+long int spd_sdram(void)
+{
+ int bus_period,tmp,row,col;
+ int total_size,bank_size,bank_code;
+ int ecc_on;
+ int mode = 4;
+ int bank_cnt = 1;
+
+ int sdram0_pmit=0x07c00000;
+ int sdram0_besr0=-1;
+ int sdram0_besr1=-1;
+ int sdram0_eccesr=-1;
+ int sdram0_ecccfg;
+
+ int sdram0_rtr=0;
+ int sdram0_tr=0;
+
+ int sdram0_b0cr;
+ int sdram0_b1cr;
+ int sdram0_b2cr;
+ int sdram0_b3cr;
+
+ int sdram0_cfg=0;
+
+ int t_rp;
+ int t_rcd;
+ int t_rc = 70; /* This value not available in SPD_EEPROM */
+ int min_cas = 2;
+
+ /*
+ * Make sure I2C controller is initialized
+ * before continuing.
+ */
+ i2c_init(CFG_I2C_SPEED, CFG_I2C_SLAVE);
+
+ /*
+ * Calculate the bus period, we do it this
+ * way to minimize stack utilization.
+ */
+ tmp = (mfdcr(pllmd) >> (31-6)) & 0xf; /* get FBDV bits */
+ tmp = CONFIG_SYS_CLK_FREQ * tmp; /* get plb freq */
+ bus_period = sdram_HZ_to_ns(tmp); /* get sdram speed */
+
+ /* Make shure we are using SDRAM */
+ if (spd_read(2) != 0x04){
+ SPD_ERR("SDRAM - non SDRAM memory module found\n");
+ }
+
+/*------------------------------------------------------------------
+ configure memory timing register
+
+ data from DIMM:
+ 27 IN Row Precharge Time ( t RP)
+ 29 MIN RAS to CAS Delay ( t RCD)
+ 127 Component and Clock Detail ,clk0-clk3, junction temp, CAS
+ -------------------------------------------------------------------*/
+
+ /*
+ * first figure out which cas latency mode to use
+ * use the min supported mode
+ */
+
+ tmp = spd_read(127) & 0x6;
+ if(tmp == 0x02){ /* only cas = 2 supported */
+ min_cas = 2;
+/* t_ck = spd_read(9); */
+/* t_ac = spd_read(10); */
+ }
+ else if (tmp == 0x04){ /* only cas = 3 supported */
+ min_cas = 3;
+/* t_ck = spd_read(9); */
+/* t_ac = spd_read(10); */
+ }
+ else if (tmp == 0x06){ /* 2,3 supported, so use 2 */
+ min_cas = 2;
+/* t_ck = spd_read(23); */
+/* t_ac = spd_read(24); */
+ }
+ else {
+ SPD_ERR("SDRAM - unsupported CAS latency \n");
+ }
+
+ /* get some timing values, t_rp,t_rcd
+ */
+ t_rp = spd_read(27);
+ t_rcd = spd_read(29);
+
+
+ /* The following timing calcs subtract 1 before deviding.
+ * this has effect of using ceiling intead of floor rounding,
+ * and also subtracting 1 to convert number to reg value
+ */
+ /* set up CASL */
+ sdram0_tr = (min_cas - 1) << SDRAM0_TR_CASL_SHIFT;
+ /* set up PTA */
+ sdram0_tr |= (((t_rp - 1)/bus_period) & 0x3) << SDRAM0_TR_PTA_SHIFT;
+ /* set up CTP */
+ tmp = ((t_rc - t_rcd - t_rp -1) / bus_period) & 0x3;
+ if(tmp<1) SPD_ERR("SDRAM - unsupported prech to act time (Trp)\n");
+ sdram0_tr |= tmp << SDRAM0_TR_CTP_SHIFT;
+ /* set LDF = 2 cycles, reg value = 1 */
+ sdram0_tr |= 1 << SDRAM0_TR_LDF_SHIFT;
+ /* set RFTA = t_rfc/bus_period, use t_rfc = t_rc */
+ tmp = ((t_rc - 1) / bus_period)-4;
+ if(tmp<0)tmp=0;
+ if(tmp>6)tmp=6;
+ sdram0_tr |= tmp << SDRAM0_TR_RFTA_SHIFT;
+ /* set RCD = t_rcd/bus_period*/
+ sdram0_tr |= (((t_rcd - 1) / bus_period) &0x3) << SDRAM0_TR_RCD_SHIFT ;
+
+
+/*------------------------------------------------------------------
+ configure RTR register
+ -------------------------------------------------------------------*/
+ row = spd_read(3);
+ col = spd_read(4);
+ tmp = spd_read(12) & 0x7f ; /* refresh type less self refresh bit */
+ switch(tmp){
+ case 0x00:
+ tmp=15625;
+ break;
+ case 0x01:
+ tmp=15625/4;
+ break;
+ case 0x02:
+ tmp=15625/2;
+ break;
+ case 0x03:
+ tmp=15625*2;
+ break;
+ case 0x04:
+ tmp=15625*4;
+ break;
+ case 0x05:
+ tmp=15625*8;
+ break;
+ default:
+ SPD_ERR("SDRAM - Bad refresh period \n");
+ }
+ /* convert from nsec to bus cycles */
+ tmp = tmp/bus_period;
+ sdram0_rtr = (tmp & 0x3ff8)<< SDRAM0_RTR_SHIFT;
+
+/*------------------------------------------------------------------
+ determine the number of banks used
+ -------------------------------------------------------------------*/
+ /* byte 7:6 is module data width */
+ if(spd_read(7) != 0)
+ SPD_ERR("SDRAM - unsupported module width\n");
+ tmp = spd_read(6);
+ if (tmp < 32)
+ SPD_ERR("SDRAM - unsupported module width\n");
+ else if (tmp < 64)
+ bank_cnt=1; /* one bank per sdram side */
+ else if (tmp < 73)
+ bank_cnt=2; /* need two banks per side */
+ else if (tmp < 161)
+ bank_cnt=4; /* need four banks per side */
+ else
+ SPD_ERR("SDRAM - unsupported module width\n");
+
+ /* byte 5 is the module row count (refered to as dimm "sides") */
+ tmp = spd_read(5);
+ if(tmp==1);
+ else if(tmp==2) bank_cnt *=2;
+ else if(tmp==4) bank_cnt *=4;
+ else bank_cnt = 8; /* 8 is an error code */
+
+ if(bank_cnt > 4) /* we only have 4 banks to work with */
+ SPD_ERR("SDRAM - unsupported module rows for this width\n");
+
+ /* now check for ECC ability of module. We only support ECC
+ * on 32 bit wide devices with 8 bit ECC.
+ */
+ if ( (spd_read(11)==2) && ((spd_read(6)==40) || (spd_read(14)==8)) ){
+ sdram0_ecccfg=0xf<<SDRAM0_ECCCFG_SHIFT;
+ ecc_on = 1;
+ }
+ else{
+ sdram0_ecccfg=0;
+ ecc_on = 0;
+ }
+
+/*------------------------------------------------------------------
+ calculate total size
+ -------------------------------------------------------------------*/
+ /* calculate total size and do sanity check */
+ tmp = spd_read(31);
+ total_size=1<<22; /* total_size = 4MB */
+ /* now multiply 4M by the smallest device roe density */
+ /* note that we don't support asymetric rows */
+ while (((tmp & 0x0001) == 0) && (tmp != 0)){
+ total_size= total_size<<1;
+ tmp = tmp>>1;
+ }
+ total_size *= spd_read(5); /* mult by module rows (dimm sides) */
+
+/*------------------------------------------------------------------
+ map rows * cols * banks to a mode
+ -------------------------------------------------------------------*/
+
+ switch( row )
+ {
+ case 11:
+ switch ( col )
+ {
+ case 8:
+ mode=4; /* mode 5 */
+ break;
+ case 9:
+ case 10:
+ mode=0; /* mode 1 */
+ break;
+ default:
+ SPD_ERR("SDRAM - unsupported mode\n");
+ }
+ break;
+ case 12:
+ switch ( col )
+ {
+ case 8:
+ mode=3; /* mode 4 */
+ break;
+ case 9:
+ case 10:
+ mode=1; /* mode 2 */
+ break;
+ default:
+ SPD_ERR("SDRAM - unsupported mode\n");
+ }
+ break;
+ case 13:
+ switch ( col )
+ {
+ case 8:
+ mode=5; /* mode 6 */
+ break;
+ case 9:
+ case 10:
+ if (spd_read(17) ==2 )
+ mode=6; /* mode 7 */
+ else
+ mode=2; /* mode 3 */
+ break;
+ case 11:
+ mode=2; /* mode 3 */
+ break;
+ default:
+ SPD_ERR("SDRAM - unsupported mode\n");
+ }
+ break;
+ default:
+ SPD_ERR("SDRAM - unsupported mode\n");
+ }
+
+/*------------------------------------------------------------------
+ using the calculated values, compute the bank
+ config register values.
+ -------------------------------------------------------------------*/
+ sdram0_b1cr = 0;
+ sdram0_b2cr = 0;
+ sdram0_b3cr = 0;
+
+ /* compute the size of each bank */
+ bank_size = total_size / bank_cnt;
+ /* convert bank size to bank size code for ppc4xx
+ by takeing log2(bank_size) - 22 */
+ tmp=bank_size; /* start with tmp = bank_size */
+ bank_code=0; /* and bank_code = 0 */
+ while (tmp>1){ /* this takes log2 of tmp */
+ bank_code++; /* and stores result in bank_code */
+ tmp=tmp>>1;
+ } /* bank_code is now log2(bank_size) */
+ bank_code-=22; /* subtract 22 to get the code */
+
+ tmp = SDRAM0_BXCR_SZ(bank_code) | SDRAM0_BXCR_AM(mode) | 1;
+ sdram0_b0cr = (bank_size) * 0 | tmp;
+ if(bank_cnt>1) sdram0_b2cr = (bank_size) * 1 | tmp;
+ if(bank_cnt>2) sdram0_b1cr = (bank_size) * 2 | tmp;
+ if(bank_cnt>3) sdram0_b3cr = (bank_size) * 3 | tmp;
+
+
+ /*
+ * enable sdram controller DCE=1
+ * enable burst read prefetch to 32 bytes BRPF=2
+ * leave other functions off
+ */
+
+/*------------------------------------------------------------------
+ now that we've done our calculations, we are ready to
+ program all the registers.
+ -------------------------------------------------------------------*/
+
+
+#define mtsdram0(reg, data) mtdcr(memcfga,reg);mtdcr(memcfgd,data)
+ /* disable memcontroller so updates work */
+ sdram0_cfg = 0;
+ mtsdram0( mem_mcopt1, sdram0_cfg );
+
+ mtsdram0( mem_besra , sdram0_besr0 );
+ mtsdram0( mem_besrb , sdram0_besr1 );
+ mtsdram0( mem_rtr , sdram0_rtr );
+ mtsdram0( mem_pmit , sdram0_pmit );
+ mtsdram0( mem_mb0cf , sdram0_b0cr );
+ mtsdram0( mem_mb1cf , sdram0_b1cr );
+ mtsdram0( mem_mb2cf , sdram0_b2cr );
+ mtsdram0( mem_mb3cf , sdram0_b3cr );
+ mtsdram0( mem_sdtr1 , sdram0_tr );
+ mtsdram0( mem_ecccf , sdram0_ecccfg );
+ mtsdram0( mem_eccerr, sdram0_eccesr );
+
+ /* SDRAM have a power on delay, 500 micro should do */
+ udelay(500);
+ sdram0_cfg = SDRAM0_CFG_DCE | SDRAM0_CFG_BRPF(1) | SDRAM0_CFG_ECCDD | SDRAM0_CFG_EMDULR;
+ if(ecc_on) sdram0_cfg |= SDRAM0_CFG_MEMCHK;
+ mtsdram0( mem_mcopt1, sdram0_cfg );
+
+
+ /* kernel 2.4.2 from mvista has a bug with memory over 128MB */
+#ifdef MVISTA_MEM_BUG
+ if (total_size > 128*1024*1024 )
+ total_size=128*1024*1024;
+#endif
+ return (total_size);
+}
+
+int spd_read(uint addr)
+{
+ char data[2];
+
+ if (i2c_read(SPD_EEPROM_ADDRESS, addr, 1, data, 1) == 0)
+ return (int)data[0];
+ else
+ return 0;
+}
+
+#else /* CONFIG_440 */
+
+/*-----------------------------------------------------------------------------
+| Memory Controller Options 0
++-----------------------------------------------------------------------------*/
+#define SDRAM_CFG0_DCEN 0x80000000 /* SDRAM Controller Enable */
+#define SDRAM_CFG0_MCHK_MASK 0x30000000 /* Memory data errchecking mask */
+#define SDRAM_CFG0_MCHK_NON 0x00000000 /* No ECC generation */
+#define SDRAM_CFG0_MCHK_GEN 0x20000000 /* ECC generation */
+#define SDRAM_CFG0_MCHK_CHK 0x30000000 /* ECC generation and checking */
+#define SDRAM_CFG0_RDEN 0x08000000 /* Registered DIMM enable */
+#define SDRAM_CFG0_PMUD 0x04000000 /* Page management unit */
+#define SDRAM_CFG0_DMWD_MASK 0x02000000 /* DRAM width mask */
+#define SDRAM_CFG0_DMWD_32 0x00000000 /* 32 bits */
+#define SDRAM_CFG0_DMWD_64 0x02000000 /* 64 bits */
+#define SDRAM_CFG0_UIOS_MASK 0x00C00000 /* Unused IO State */
+#define SDRAM_CFG0_PDP 0x00200000 /* Page deallocation policy */
+
+/*-----------------------------------------------------------------------------
+| Memory Controller Options 1
++-----------------------------------------------------------------------------*/
+#define SDRAM_CFG1_SRE 0x80000000 /* Self-Refresh Entry */
+#define SDRAM_CFG1_PMEN 0x40000000 /* Power Management Enable */
+
+/*-----------------------------------------------------------------------------+
+| SDRAM DEVPOT Options
++-----------------------------------------------------------------------------*/
+#define SDRAM_DEVOPT_DLL 0x80000000
+#define SDRAM_DEVOPT_DS 0x40000000
+
+/*-----------------------------------------------------------------------------+
+| SDRAM MCSTS Options
++-----------------------------------------------------------------------------*/
+#define SDRAM_MCSTS_MRSC 0x80000000
+#define SDRAM_MCSTS_SRMS 0x40000000
+#define SDRAM_MCSTS_CIS 0x20000000
+
+/*-----------------------------------------------------------------------------
+| SDRAM Refresh Timer Register
++-----------------------------------------------------------------------------*/
+#define SDRAM_RTR_RINT_MASK 0xFFFF0000
+#define SDRAM_RTR_RINT_ENCODE(n) (((n) << 16) & SDRAM_RTR_RINT_MASK)
+#define sdram_HZ_to_ns(hertz) (1000000000/(hertz))
+
+/*-----------------------------------------------------------------------------+
+| SDRAM UABus Base Address Reg
++-----------------------------------------------------------------------------*/
+#define SDRAM_UABBA_UBBA_MASK 0x0000000F
+
+/*-----------------------------------------------------------------------------+
+| Memory Bank 0-7 configuration
++-----------------------------------------------------------------------------*/
+#define SDRAM_BXCR_SDBA_MASK 0xff800000 /* Base address */
+#define SDRAM_BXCR_SDSZ_MASK 0x000e0000 /* Size */
+#define SDRAM_BXCR_SDSZ_8 0x00020000 /* 8M */
+#define SDRAM_BXCR_SDSZ_16 0x00040000 /* 16M */
+#define SDRAM_BXCR_SDSZ_32 0x00060000 /* 32M */
+#define SDRAM_BXCR_SDSZ_64 0x00080000 /* 64M */
+#define SDRAM_BXCR_SDSZ_128 0x000a0000 /* 128M */
+#define SDRAM_BXCR_SDSZ_256 0x000c0000 /* 256M */
+#define SDRAM_BXCR_SDSZ_512 0x000e0000 /* 512M */
+#define SDRAM_BXCR_SDAM_MASK 0x0000e000 /* Addressing mode */
+#define SDRAM_BXCR_SDAM_1 0x00000000 /* Mode 1 */
+#define SDRAM_BXCR_SDAM_2 0x00002000 /* Mode 2 */
+#define SDRAM_BXCR_SDAM_3 0x00004000 /* Mode 3 */
+#define SDRAM_BXCR_SDAM_4 0x00006000 /* Mode 4 */
+#define SDRAM_BXCR_SDBE 0x00000001 /* Memory Bank Enable */
+
+/*-----------------------------------------------------------------------------+
+| SDRAM TR0 Options
++-----------------------------------------------------------------------------*/
+#define SDRAM_TR0_SDWR_MASK 0x80000000
+#define SDRAM_TR0_SDWR_2_CLK 0x00000000
+#define SDRAM_TR0_SDWR_3_CLK 0x80000000
+#define SDRAM_TR0_SDWD_MASK 0x40000000
+#define SDRAM_TR0_SDWD_0_CLK 0x00000000
+#define SDRAM_TR0_SDWD_1_CLK 0x40000000
+#define SDRAM_TR0_SDCL_MASK 0x01800000
+#define SDRAM_TR0_SDCL_2_0_CLK 0x00800000
+#define SDRAM_TR0_SDCL_2_5_CLK 0x01000000
+#define SDRAM_TR0_SDCL_3_0_CLK 0x01800000
+#define SDRAM_TR0_SDPA_MASK 0x000C0000
+#define SDRAM_TR0_SDPA_2_CLK 0x00040000
+#define SDRAM_TR0_SDPA_3_CLK 0x00080000
+#define SDRAM_TR0_SDPA_4_CLK 0x000C0000
+#define SDRAM_TR0_SDCP_MASK 0x00030000
+#define SDRAM_TR0_SDCP_2_CLK 0x00000000
+#define SDRAM_TR0_SDCP_3_CLK 0x00010000
+#define SDRAM_TR0_SDCP_4_CLK 0x00020000
+#define SDRAM_TR0_SDCP_5_CLK 0x00030000
+#define SDRAM_TR0_SDLD_MASK 0x0000C000
+#define SDRAM_TR0_SDLD_1_CLK 0x00000000
+#define SDRAM_TR0_SDLD_2_CLK 0x00004000
+#define SDRAM_TR0_SDRA_MASK 0x0000001C
+#define SDRAM_TR0_SDRA_6_CLK 0x00000000
+#define SDRAM_TR0_SDRA_7_CLK 0x00000004
+#define SDRAM_TR0_SDRA_8_CLK 0x00000008
+#define SDRAM_TR0_SDRA_9_CLK 0x0000000C
+#define SDRAM_TR0_SDRA_10_CLK 0x00000010
+#define SDRAM_TR0_SDRA_11_CLK 0x00000014
+#define SDRAM_TR0_SDRA_12_CLK 0x00000018
+#define SDRAM_TR0_SDRA_13_CLK 0x0000001C
+#define SDRAM_TR0_SDRD_MASK 0x00000003
+#define SDRAM_TR0_SDRD_2_CLK 0x00000001
+#define SDRAM_TR0_SDRD_3_CLK 0x00000002
+#define SDRAM_TR0_SDRD_4_CLK 0x00000003
+
+/*-----------------------------------------------------------------------------+
+| SDRAM TR1 Options
++-----------------------------------------------------------------------------*/
+#define SDRAM_TR1_RDSS_MASK 0xC0000000
+#define SDRAM_TR1_RDSS_TR0 0x00000000
+#define SDRAM_TR1_RDSS_TR1 0x40000000
+#define SDRAM_TR1_RDSS_TR2 0x80000000
+#define SDRAM_TR1_RDSS_TR3 0xC0000000
+#define SDRAM_TR1_RDSL_MASK 0x00C00000
+#define SDRAM_TR1_RDSL_STAGE1 0x00000000
+#define SDRAM_TR1_RDSL_STAGE2 0x00400000
+#define SDRAM_TR1_RDSL_STAGE3 0x00800000
+#define SDRAM_TR1_RDCD_MASK 0x00000800
+#define SDRAM_TR1_RDCD_RCD_0_0 0x00000000
+#define SDRAM_TR1_RDCD_RCD_1_2 0x00000800
+#define SDRAM_TR1_RDCT_MASK 0x000001FF
+#define SDRAM_TR1_RDCT_ENCODE(x) (((x) << 0) & SDRAM_TR1_RDCT_MASK)
+#define SDRAM_TR1_RDCT_DECODE(x) (((x) & SDRAM_TR1_RDCT_MASK) >> 0)
+#define SDRAM_TR1_RDCT_MIN 0x00000000
+#define SDRAM_TR1_RDCT_MAX 0x000001FF
+
+/*-----------------------------------------------------------------------------+
+| SDRAM WDDCTR Options
++-----------------------------------------------------------------------------*/
+#define SDRAM_WDDCTR_WRCP_MASK 0xC0000000
+#define SDRAM_WDDCTR_WRCP_0DEG 0x00000000
+#define SDRAM_WDDCTR_WRCP_90DEG 0x40000000
+#define SDRAM_WDDCTR_WRCP_180DEG 0x80000000
+#define SDRAM_WDDCTR_DCD_MASK 0x000001FF
+
+/*-----------------------------------------------------------------------------+
+| SDRAM CLKTR Options
++-----------------------------------------------------------------------------*/
+#define SDRAM_CLKTR_CLKP_MASK 0xC0000000
+#define SDRAM_CLKTR_CLKP_0DEG 0x00000000
+#define SDRAM_CLKTR_CLKP_90DEG 0x40000000
+#define SDRAM_CLKTR_CLKP_180DEG 0x80000000
+#define SDRAM_CLKTR_DCDT_MASK 0x000001FF
+
+/*-----------------------------------------------------------------------------+
+| SDRAM DLYCAL Options
++-----------------------------------------------------------------------------*/
+#define SDRAM_DLYCAL_DLCV_MASK 0x000003FC
+#define SDRAM_DLYCAL_DLCV_ENCODE(x) (((x)<<2) & SDRAM_DLYCAL_DLCV_MASK)
+#define SDRAM_DLYCAL_DLCV_DECODE(x) (((x) & SDRAM_DLYCAL_DLCV_MASK)>>2)
+
+/*-----------------------------------------------------------------------------+
+| General Definition
++-----------------------------------------------------------------------------*/
+#define DEFAULT_SPD_ADDR1 0x53
+#define DEFAULT_SPD_ADDR2 0x52
+#define ONE_BILLION 1000000000
+#define MAXBANKS 4 /* at most 4 dimm banks */
+#define MAX_SPD_BYTES 256
+#define NUMHALFCYCLES 4
+#define NUMMEMTESTS 8
+#define NUMMEMWORDS 8
+#define MAXBXCR 4
+#define TRUE 1
+#define FALSE 0
+
+const unsigned long test[NUMMEMTESTS][NUMMEMWORDS] = {
+ {0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000,
+ 0xFFFFFFFF, 0xFFFFFFFF},
+ {0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF,
+ 0x00000000, 0x00000000},
+ {0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA,
+ 0x55555555, 0x55555555},
+ {0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555,
+ 0xAAAAAAAA, 0xAAAAAAAA},
+ {0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5,
+ 0x5A5A5A5A, 0x5A5A5A5A},
+ {0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A,
+ 0xA5A5A5A5, 0xA5A5A5A5},
+ {0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55,
+ 0x55AA55AA, 0x55AA55AA},
+ {0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA,
+ 0xAA55AA55, 0xAA55AA55}
+};
+
+
+unsigned char spd_read(uchar chip, uint addr);
+
+void get_spd_info(unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks);
+
+void check_mem_type
+ (unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks);
+
+void check_volt_type
+ (unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks);
+
+void program_cfg0(unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks);
+
+void program_cfg1(unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks);
+
+void program_rtr (unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks);
+
+void program_tr0 (unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks);
+
+void program_tr1 (void);
+
+void program_ecc (unsigned long num_bytes);
+
+unsigned
+long program_bxcr(unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks);
+
+/*
+ * This function is reading data from the DIMM module EEPROM over the SPD bus
+ * and uses that to program the sdram controller.
+ *
+ * This works on boards that has the same schematics that the IBM walnut has.
+ *
+ * BUG: Don't handle ECC memory
+ * BUG: A few values in the TR register is currently hardcoded
+ */
+
+long int spd_sdram(void) {
+ unsigned char iic0_dimm_addr[] = SPD_EEPROM_ADDRESS;
+ unsigned long dimm_populated[sizeof(iic0_dimm_addr)];
+ unsigned long total_size;
+ unsigned long cfg0;
+ unsigned long mcsts;
+ unsigned long num_dimm_banks; /* on board dimm banks */
+
+ num_dimm_banks = sizeof(iic0_dimm_addr);
+
+ /*
+ * Make sure I2C controller is initialized
+ * before continuing.
+ */
+ i2c_init(CFG_I2C_SPEED, CFG_I2C_SLAVE);
+
+ /*
+ * Read the SPD information using I2C interface. Check to see if the
+ * DIMM slots are populated.
+ */
+ get_spd_info(dimm_populated, iic0_dimm_addr, num_dimm_banks);
+
+ /*
+ * Check the memory type for the dimms plugged.
+ */
+ check_mem_type(dimm_populated, iic0_dimm_addr, num_dimm_banks);
+
+ /*
+ * Check the voltage type for the dimms plugged.
+ */
+ check_volt_type(dimm_populated, iic0_dimm_addr, num_dimm_banks);
+
+ /*
+ * program 440GP SDRAM controller options (SDRAM0_CFG0)
+ */
+ program_cfg0(dimm_populated, iic0_dimm_addr, num_dimm_banks);
+
+ /*
+ * program 440GP SDRAM controller options (SDRAM0_CFG1)
+ */
+ program_cfg1(dimm_populated, iic0_dimm_addr, num_dimm_banks);
+
+ /*
+ * program SDRAM refresh register (SDRAM0_RTR)
+ */
+ program_rtr(dimm_populated, iic0_dimm_addr, num_dimm_banks);
+
+ /*
+ * program SDRAM Timing Register 0 (SDRAM0_TR0)
+ */
+ program_tr0(dimm_populated, iic0_dimm_addr, num_dimm_banks);
+
+ /*
+ * program the BxCR registers to find out total sdram installed
+ */
+ total_size = program_bxcr(dimm_populated, iic0_dimm_addr,
+ num_dimm_banks);
+
+ /*
+ * program SDRAM Clock Timing Register (SDRAM0_CLKTR)
+ */
+ mtsdram(mem_clktr, 0x40000000);
+
+ /*
+ * delay to ensure 200 usec has elapsed
+ */
+ udelay(400);
+
+ /*
+ * enable the memory controller
+ */
+ mfsdram(mem_cfg0, cfg0);
+ mtsdram(mem_cfg0, cfg0 | SDRAM_CFG0_DCEN);
+
+ /*
+ * wait for SDRAM_CFG0_DC_EN to complete
+ */
+ while(1) {
+ mfsdram(mem_mcsts, mcsts);
+ if ((mcsts & SDRAM_MCSTS_MRSC) != 0) {
+ break;
+ }
+ }
+
+ /*
+ * program SDRAM Timing Register 1, adding some delays
+ */
+ program_tr1();
+
+ /*
+ * if ECC is enabled, initialize parity bits
+ */
+
+ return total_size;
+}
+
+unsigned char spd_read(uchar chip, uint addr) {
+ unsigned char data[2];
+
+ if (i2c_read(chip, addr, 1, data, 1) == 0)
+ return data[0];
+ else
+ return 0;
+}
+
+void get_spd_info(unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks)
+{
+ unsigned long dimm_num;
+ unsigned long dimm_found;
+ unsigned char num_of_bytes;
+ unsigned char total_size;
+
+ dimm_found = FALSE;
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ num_of_bytes = 0;
+ total_size = 0;
+
+ num_of_bytes = spd_read(iic0_dimm_addr[dimm_num], 0);
+ total_size = spd_read(iic0_dimm_addr[dimm_num], 1);
+
+ if ((num_of_bytes != 0) && (total_size != 0)) {
+ dimm_populated[dimm_num] = TRUE;
+ dimm_found = TRUE;
+#if 0
+ printf("DIMM slot %lu: populated\n", dimm_num);
+#endif
+ }
+ else {
+ dimm_populated[dimm_num] = FALSE;
+#if 0
+ printf("DIMM slot %lu: Not populated\n", dimm_num);
+#endif
+ }
+ }
+
+ if (dimm_found == FALSE) {
+ printf("ERROR - No memory installed. Install a DDR-SDRAM DIMM.\n\n");
+ hang();
+ }
+}
+
+void check_mem_type(unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks)
+{
+ unsigned long dimm_num;
+ unsigned char dimm_type;
+
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ if (dimm_populated[dimm_num] == TRUE) {
+ dimm_type = spd_read(iic0_dimm_addr[dimm_num], 2);
+ switch (dimm_type) {
+ case 7:
+#if 0
+ printf("DIMM slot %lu: DDR SDRAM detected\n", dimm_num);
+#endif
+ break;
+ default:
+ printf("ERROR: Unsupported DIMM detected in slot %lu.\n",
+ dimm_num);
+ printf("Only DDR SDRAM DIMMs are supported.\n");
+ printf("Replace the DIMM module with a supported DIMM.\n\n");
+ hang();
+ break;
+ }
+ }
+ }
+}
+
+
+void check_volt_type(unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks)
+{
+ unsigned long dimm_num;
+ unsigned long voltage_type;
+
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ if (dimm_populated[dimm_num] == TRUE) {
+ voltage_type = spd_read(iic0_dimm_addr[dimm_num], 8);
+ if (voltage_type != 0x04) {
+ printf("ERROR: DIMM %lu with unsupported voltage level.\n",
+ dimm_num);
+ hang();
+ }
+ else {
+#if 0
+ printf("DIMM %lu voltage level supported.\n", dimm_num);
+#endif
+ }
+ break;
+ }
+ }
+}
+
+void program_cfg0(unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks)
+{
+ unsigned long dimm_num;
+ unsigned long cfg0;
+ unsigned long ecc_enabled;
+ unsigned char ecc;
+ unsigned char attributes;
+ unsigned long data_width;
+ unsigned long dimm_32bit;
+ unsigned long dimm_64bit;
+
+ /*
+ * get Memory Controller Options 0 data
+ */
+ mfsdram(mem_cfg0, cfg0);
+
+ /*
+ * clear bits
+ */
+ cfg0 &= ~(SDRAM_CFG0_DCEN | SDRAM_CFG0_MCHK_MASK |
+ SDRAM_CFG0_RDEN | SDRAM_CFG0_PMUD |
+ SDRAM_CFG0_DMWD_MASK |
+ SDRAM_CFG0_UIOS_MASK | SDRAM_CFG0_PDP);
+
+
+ /*
+ * FIXME: assume the DDR SDRAMs in both banks are the same
+ */
+ ecc_enabled = TRUE;
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ if (dimm_populated[dimm_num] == TRUE) {
+ ecc = spd_read(iic0_dimm_addr[dimm_num], 11);
+ if (ecc != 0x02) {
+ ecc_enabled = FALSE;
+ }
+
+ /*
+ * program Registered DIMM Enable
+ */
+ attributes = spd_read(iic0_dimm_addr[dimm_num], 21);
+ if ((attributes & 0x02) != 0x00) {
+ cfg0 |= SDRAM_CFG0_RDEN;
+ }
+
+ /*
+ * program DDR SDRAM Data Width
+ */
+ data_width =
+ (unsigned long)spd_read(iic0_dimm_addr[dimm_num],6) +
+ (((unsigned long)spd_read(iic0_dimm_addr[dimm_num],7)) << 8);
+ if (data_width == 64 || data_width == 72) {
+ dimm_64bit = TRUE;
+ cfg0 |= SDRAM_CFG0_DMWD_64;
+ }
+ else if (data_width == 32 || data_width == 40) {
+ dimm_32bit = TRUE;
+ cfg0 |= SDRAM_CFG0_DMWD_32;
+ }
+ else {
+ printf("WARNING: DIMM with datawidth of %lu bits.\n",
+ data_width);
+ printf("Only DIMMs with 32 or 64 bit datawidths supported.\n");
+ hang();
+ }
+ break;
+ }
+ }
+
+ /*
+ * program Memory Data Error Checking
+ */
+ if (ecc_enabled == TRUE) {
+ cfg0 |= SDRAM_CFG0_MCHK_GEN;
+ }
+ else {
+ cfg0 |= SDRAM_CFG0_MCHK_NON;
+ }
+
+ /*
+ * program Page Management Unit
+ */
+ cfg0 |= SDRAM_CFG0_PMUD;
+
+ /*
+ * program Memory Controller Options 0
+ * Note: DCEN must be enabled after all DDR SDRAM controller
+ * configuration registers get initialized.
+ */
+ mtsdram(mem_cfg0, cfg0);
+}
+
+void program_cfg1(unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks)
+{
+ unsigned long cfg1;
+ mfsdram(mem_cfg1, cfg1);
+
+ /*
+ * Self-refresh exit, disable PM
+ */
+ cfg1 &= ~(SDRAM_CFG1_SRE | SDRAM_CFG1_PMEN);
+
+ /*
+ * program Memory Controller Options 1
+ */
+ mtsdram(mem_cfg1, cfg1);
+}
+
+void program_rtr (unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks)
+{
+ unsigned long dimm_num;
+ unsigned long bus_period_x_10;
+ unsigned long refresh_rate = 0;
+ unsigned char refresh_rate_type;
+ unsigned long refresh_interval;
+ unsigned long sdram_rtr;
+ PPC440_SYS_INFO sys_info;
+
+ /*
+ * get the board info
+ */
+ get_sys_info(&sys_info);
+ bus_period_x_10 = ONE_BILLION / (sys_info.freqPLB / 10);
+
+
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ if (dimm_populated[dimm_num] == TRUE) {
+ refresh_rate_type = 0x7F & spd_read(iic0_dimm_addr[dimm_num], 12);
+ switch (refresh_rate_type) {
+ case 0x00:
+ refresh_rate = 15625;
+ break;
+ case 0x011:
+ refresh_rate = 15625/4;
+ break;
+ case 0x02:
+ refresh_rate = 15625/2;
+ break;
+ case 0x03:
+ refresh_rate = 15626*2;
+ break;
+ case 0x04:
+ refresh_rate = 15625*4;
+ break;
+ case 0x05:
+ refresh_rate = 15625*8;
+ break;
+ default:
+ printf("ERROR: DIMM %lu, unsupported refresh rate/type.\n",
+ dimm_num);
+ printf("Replace the DIMM module with a supported DIMM.\n");
+ break;
+ }
+
+ break;
+ }
+ }
+
+ refresh_interval = refresh_rate * 10 / bus_period_x_10;
+ sdram_rtr = (refresh_interval & 0x3ff8) << 16;
+
+ /*
+ * program Refresh Timer Register (SDRAM0_RTR)
+ */
+ mtsdram(mem_rtr, sdram_rtr);
+}
+
+void program_tr0 (unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks)
+{
+ unsigned long dimm_num;
+ unsigned long tr0;
+ unsigned char wcsbc;
+ unsigned char t_rp_ns;
+ unsigned char t_rcd_ns;
+ unsigned char t_ras_ns;
+ unsigned long t_rp_clk;
+ unsigned long t_ras_rcd_clk;
+ unsigned long t_rcd_clk;
+ unsigned long t_rfc_clk;
+ unsigned long plb_check;
+ unsigned char cas_bit;
+ unsigned long cas_index;
+ unsigned char cas_2_0_available;
+ unsigned char cas_2_5_available;
+ unsigned char cas_3_0_available;
+ unsigned long cycle_time_ns_x_10[3];
+ unsigned long tcyc_3_0_ns_x_10;
+ unsigned long tcyc_2_5_ns_x_10;
+ unsigned long tcyc_2_0_ns_x_10;
+ unsigned long tcyc_reg;
+ unsigned long bus_period_x_10;
+ PPC440_SYS_INFO sys_info;
+ unsigned long residue;
+
+ /*
+ * get the board info
+ */
+ get_sys_info(&sys_info);
+ bus_period_x_10 = ONE_BILLION / (sys_info.freqPLB / 10);
+
+ /*
+ * get SDRAM Timing Register 0 (SDRAM_TR0) and clear bits
+ */
+ mfsdram(mem_tr0, tr0);
+ tr0 &= ~(SDRAM_TR0_SDWR_MASK | SDRAM_TR0_SDWD_MASK |
+ SDRAM_TR0_SDCL_MASK | SDRAM_TR0_SDPA_MASK |
+ SDRAM_TR0_SDCP_MASK | SDRAM_TR0_SDLD_MASK |
+ SDRAM_TR0_SDRA_MASK | SDRAM_TR0_SDRD_MASK);
+
+ /*
+ * initialization
+ */
+ wcsbc = 0;
+ t_rp_ns = 0;
+ t_rcd_ns = 0;
+ t_ras_ns = 0;
+ cas_2_0_available = TRUE;
+ cas_2_5_available = TRUE;
+ cas_3_0_available = TRUE;
+ tcyc_2_0_ns_x_10 = 0;
+ tcyc_2_5_ns_x_10 = 0;
+ tcyc_3_0_ns_x_10 = 0;
+
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ if (dimm_populated[dimm_num] == TRUE) {
+ wcsbc = spd_read(iic0_dimm_addr[dimm_num], 15);
+ t_rp_ns = spd_read(iic0_dimm_addr[dimm_num], 27) >> 2;
+ t_rcd_ns = spd_read(iic0_dimm_addr[dimm_num], 29) >> 2;
+ t_ras_ns = spd_read(iic0_dimm_addr[dimm_num], 30);
+ cas_bit = spd_read(iic0_dimm_addr[dimm_num], 18);
+
+ for (cas_index = 0; cas_index < 3; cas_index++) {
+ switch (cas_index) {
+ case 0:
+ tcyc_reg = spd_read(iic0_dimm_addr[dimm_num], 9);
+ break;
+ case 1:
+ tcyc_reg = spd_read(iic0_dimm_addr[dimm_num], 23);
+ break;
+ default:
+ tcyc_reg = spd_read(iic0_dimm_addr[dimm_num], 25);
+ break;
+ }
+
+ if ((tcyc_reg & 0x0F) >= 10) {
+ printf("ERROR: Tcyc incorrect for DIMM in slot %lu\n",
+ dimm_num);
+ hang();
+ }
+
+ cycle_time_ns_x_10[cas_index] =
+ (((tcyc_reg & 0xF0) >> 4) * 10) + (tcyc_reg & 0x0F);
+ }
+
+ cas_index = 0;
+
+ if ((cas_bit & 0x80) != 0) {
+ cas_index += 3;
+ }
+ else if ((cas_bit & 0x40) != 0) {
+ cas_index += 2;
+ }
+ else if ((cas_bit & 0x20) != 0) {
+ cas_index += 1;
+ }
+
+ if (((cas_bit & 0x10) != 0) && (cas_index < 3)) {
+ tcyc_3_0_ns_x_10 = cycle_time_ns_x_10[cas_index];
+ cas_index++;
+ }
+ else {
+ if (cas_index != 0) {
+ cas_index++;
+ }
+ cas_3_0_available = FALSE;
+ }
+
+ if (((cas_bit & 0x08) != 0) || (cas_index < 3)) {
+ tcyc_2_5_ns_x_10 = cycle_time_ns_x_10[cas_index];
+ cas_index++;
+ }
+ else {
+ if (cas_index != 0) {
+ cas_index++;
+ }
+ cas_2_5_available = FALSE;
+ }
+
+ if (((cas_bit & 0x04) != 0) || (cas_index < 3)) {
+ tcyc_2_0_ns_x_10 = cycle_time_ns_x_10[cas_index];
+ cas_index++;
+ }
+ else {
+ if (cas_index != 0) {
+ cas_index++;
+ }
+ cas_2_0_available = FALSE;
+ }
+
+ break;
+ }
+ }
+
+ /*
+ * Program SD_WR and SD_WCSBC fields
+ */
+ tr0 |= SDRAM_TR0_SDWR_2_CLK; /* Write Recovery: 2 CLK */
+ switch (wcsbc) {
+ case 0:
+ tr0 |= SDRAM_TR0_SDWD_0_CLK;
+ break;
+ default:
+ tr0 |= SDRAM_TR0_SDWD_1_CLK;
+ break;
+ }
+
+ /*
+ * Program SD_CASL field
+ */
+ if ((cas_2_0_available == TRUE) &&
+ (bus_period_x_10 >= tcyc_2_0_ns_x_10)) {
+ tr0 |= SDRAM_TR0_SDCL_2_0_CLK;
+ }
+ else if((cas_2_5_available == TRUE) &&
+ (bus_period_x_10 >= tcyc_2_5_ns_x_10)) {
+ tr0 |= SDRAM_TR0_SDCL_2_5_CLK;
+ }
+ else if((cas_3_0_available == TRUE) &&
+ (bus_period_x_10 >= tcyc_3_0_ns_x_10)) {
+ tr0 |= SDRAM_TR0_SDCL_3_0_CLK;
+ }
+ else {
+ printf("ERROR: No supported CAS latency with the installed DIMMs.\n");
+ printf("Only CAS latencies of 2.0, 2.5, and 3.0 are supported.\n");
+ printf("Make sure the PLB speed is within the supported range.\n");
+ hang();
+ }
+
+ /*
+ * Calculate Trp in clock cycles and round up if necessary
+ * Program SD_PTA field
+ */
+ t_rp_clk = sys_info.freqPLB * t_rp_ns / ONE_BILLION;
+ plb_check = ONE_BILLION * t_rp_clk / t_rp_ns;
+ if (sys_info.freqPLB != plb_check) {
+ t_rp_clk++;
+ }
+ switch ((unsigned long)t_rp_clk) {
+ case 0:
+ case 1:
+ case 2:
+ tr0 |= SDRAM_TR0_SDPA_2_CLK;
+ break;
+ case 3:
+ tr0 |= SDRAM_TR0_SDPA_3_CLK;
+ break;
+ default:
+ tr0 |= SDRAM_TR0_SDPA_4_CLK;
+ break;
+ }
+
+ /*
+ * Program SD_CTP field
+ */
+ t_ras_rcd_clk = sys_info.freqPLB * (t_ras_ns - t_rcd_ns) / ONE_BILLION;
+ plb_check = ONE_BILLION * t_ras_rcd_clk / (t_ras_ns - t_rcd_ns);
+ if (sys_info.freqPLB != plb_check) {
+ t_ras_rcd_clk++;
+ }
+ switch (t_ras_rcd_clk) {
+ case 0:
+ case 1:
+ case 2:
+ tr0 |= SDRAM_TR0_SDCP_2_CLK;
+ break;
+ case 3:
+ tr0 |= SDRAM_TR0_SDCP_3_CLK;
+ break;
+ case 4:
+ tr0 |= SDRAM_TR0_SDCP_4_CLK;
+ break;
+ default:
+ tr0 |= SDRAM_TR0_SDCP_5_CLK;
+ break;
+ }
+
+ /*
+ * Program SD_LDF field
+ */
+ tr0 |= SDRAM_TR0_SDLD_2_CLK;
+
+ /*
+ * Program SD_RFTA field
+ * FIXME tRFC hardcoded as 75 nanoseconds
+ */
+ t_rfc_clk = sys_info.freqPLB / (ONE_BILLION / 75);
+ residue = sys_info.freqPLB % (ONE_BILLION / 75);
+ if (residue >= (ONE_BILLION / 150)) {
+ t_rfc_clk++;
+ }
+ switch (t_rfc_clk) {
+ case 0:
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ tr0 |= SDRAM_TR0_SDRA_6_CLK;
+ break;
+ case 7:
+ tr0 |= SDRAM_TR0_SDRA_7_CLK;
+ break;
+ case 8:
+ tr0 |= SDRAM_TR0_SDRA_8_CLK;
+ break;
+ case 9:
+ tr0 |= SDRAM_TR0_SDRA_9_CLK;
+ break;
+ case 10:
+ tr0 |= SDRAM_TR0_SDRA_10_CLK;
+ break;
+ case 11:
+ tr0 |= SDRAM_TR0_SDRA_11_CLK;
+ break;
+ case 12:
+ tr0 |= SDRAM_TR0_SDRA_12_CLK;
+ break;
+ default:
+ tr0 |= SDRAM_TR0_SDRA_13_CLK;
+ break;
+ }
+
+ /*
+ * Program SD_RCD field
+ */
+ t_rcd_clk = sys_info.freqPLB * t_rcd_ns / ONE_BILLION;
+ plb_check = ONE_BILLION * t_rcd_clk / t_rcd_ns;
+ if (sys_info.freqPLB != plb_check) {
+ t_rcd_clk++;
+ }
+ switch (t_rcd_clk) {
+ case 0:
+ case 1:
+ case 2:
+ tr0 |= SDRAM_TR0_SDRD_2_CLK;
+ break;
+ case 3:
+ tr0 |= SDRAM_TR0_SDRD_3_CLK;
+ break;
+ default:
+ tr0 |= SDRAM_TR0_SDRD_4_CLK;
+ break;
+ }
+
+#if 0
+ printf("tr0: %x\n", tr0);
+#endif
+ mtsdram(mem_tr0, tr0);
+}
+
+void program_tr1 (void)
+{
+ unsigned long tr0;
+ unsigned long tr1;
+ unsigned long cfg0;
+ unsigned long ecc_temp;
+ unsigned long dlycal;
+ unsigned long dly_val;
+ unsigned long i, j, k;
+ unsigned long bxcr_num;
+ unsigned long max_pass_length;
+ unsigned long current_pass_length;
+ unsigned long current_fail_length;
+ unsigned long current_start;
+ unsigned long rdclt;
+ unsigned long rdclt_offset;
+ long max_start;
+ long max_end;
+ long rdclt_average;
+ unsigned char window_found;
+ unsigned char fail_found;
+ unsigned char pass_found;
+ unsigned long * membase;
+ PPC440_SYS_INFO sys_info;
+
+ /*
+ * get the board info
+ */
+ get_sys_info(&sys_info);
+
+ /*
+ * get SDRAM Timing Register 0 (SDRAM_TR0) and clear bits
+ */
+ mfsdram(mem_tr1, tr1);
+ tr1 &= ~(SDRAM_TR1_RDSS_MASK | SDRAM_TR1_RDSL_MASK |
+ SDRAM_TR1_RDCD_MASK | SDRAM_TR1_RDCT_MASK);
+
+ mfsdram(mem_tr0, tr0);
+ if (((tr0 & SDRAM_TR0_SDCL_MASK) == SDRAM_TR0_SDCL_2_5_CLK) &&
+ (sys_info.freqPLB > 100000000)) {
+ tr1 |= SDRAM_TR1_RDSS_TR2;
+ tr1 |= SDRAM_TR1_RDSL_STAGE3;
+ tr1 |= SDRAM_TR1_RDCD_RCD_1_2;
+ }
+ else {
+ tr1 |= SDRAM_TR1_RDSS_TR1;
+ tr1 |= SDRAM_TR1_RDSL_STAGE2;
+ tr1 |= SDRAM_TR1_RDCD_RCD_0_0;
+ }
+
+ /*
+ * save CFG0 ECC setting to a temporary variable and turn ECC off
+ */
+ mfsdram(mem_cfg0, cfg0);
+ ecc_temp = cfg0 & SDRAM_CFG0_MCHK_MASK;
+ mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) | SDRAM_CFG0_MCHK_NON);
+
+ /*
+ * get the delay line calibration register value
+ */
+ mfsdram(mem_dlycal, dlycal);
+ dly_val = SDRAM_DLYCAL_DLCV_DECODE(dlycal) << 2;
+
+ max_pass_length = 0;
+ max_start = 0;
+ max_end = 0;
+ current_pass_length = 0;
+ current_fail_length = 0;
+ current_start = 0;
+ rdclt_offset = 0;
+ window_found = FALSE;
+ fail_found = FALSE;
+ pass_found = FALSE;
+#ifdef DEBUG
+ printf("Starting memory test ");
+#endif
+ for (k = 0; k < NUMHALFCYCLES; k++) {
+ for (rdclt = 0; rdclt < dly_val; rdclt++) {
+ /*
+ * Set the timing reg for the test.
+ */
+ mtsdram(mem_tr1, (tr1 | SDRAM_TR1_RDCT_ENCODE(rdclt)));
+
+ for (bxcr_num = 0; bxcr_num < MAXBXCR; bxcr_num++) {
+ mtdcr(memcfga, mem_b0cr + (bxcr_num<<2));
+ if ((mfdcr(memcfgd) & SDRAM_BXCR_SDBE) == SDRAM_BXCR_SDBE) {
+ /* Bank is enabled */
+ membase = (unsigned long*)
+ (mfdcr(memcfgd) & SDRAM_BXCR_SDBA_MASK);
+
+ /*
+ * Run the short memory test
+ */
+ for (i = 0; i < NUMMEMTESTS; i++) {
+ for (j = 0; j < NUMMEMWORDS; j++) {
+ membase[j] = test[i][j];
+ ppcDcbf((unsigned long)&(membase[j]));
+ }
+
+ for (j = 0; j < NUMMEMWORDS; j++) {
+ if (membase[j] != test[i][j]) {
+ ppcDcbf((unsigned long)&(membase[j]));
+ break;
+ }
+ ppcDcbf((unsigned long)&(membase[j]));
+ }
+
+ if (j < NUMMEMWORDS) {
+ break;
+ }
+ }
+
+ /*
+ * see if the rdclt value passed
+ */
+ if (i < NUMMEMTESTS) {
+ break;
+ }
+ }
+ }
+
+ if (bxcr_num == MAXBXCR) {
+ if (fail_found == TRUE) {
+ pass_found = TRUE;
+ if (current_pass_length == 0) {
+ current_start = rdclt_offset + rdclt;
+ }
+
+ current_fail_length = 0;
+ current_pass_length++;
+
+ if (current_pass_length > max_pass_length) {
+ max_pass_length = current_pass_length;
+ max_start = current_start;
+ max_end = rdclt_offset + rdclt;
+ }
+ }
+ }
+ else {
+ current_pass_length = 0;
+ current_fail_length++;
+
+ if (current_fail_length >= (dly_val>>2)) {
+ if (fail_found == FALSE) {
+ fail_found = TRUE;
+ }
+ else if (pass_found == TRUE) {
+ window_found = TRUE;
+ break;
+ }
+ }
+ }
+ }
+#ifdef DEBUG
+ printf(".");
+#endif
+ if (window_found == TRUE) {
+ break;
+ }
+
+ tr1 = tr1 ^ SDRAM_TR1_RDCD_MASK;
+ rdclt_offset += dly_val;
+ }
+#ifdef DEBUG
+ printf("\n");
+#endif
+
+ /*
+ * make sure we find the window
+ */
+ if (window_found == FALSE) {
+ printf("ERROR: Cannot determine a common read delay.\n");
+ hang();
+ }
+
+ /*
+ * restore the orignal ECC setting
+ */
+ mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) | ecc_temp);
+
+ /*
+ * set the SDRAM TR1 RDCD value
+ */
+ tr1 &= ~SDRAM_TR1_RDCD_MASK;
+ if ((tr0 & SDRAM_TR0_SDCL_MASK) == SDRAM_TR0_SDCL_2_5_CLK) {
+ tr1 |= SDRAM_TR1_RDCD_RCD_1_2;
+ }
+ else {
+ tr1 |= SDRAM_TR1_RDCD_RCD_0_0;
+ }
+
+ /*
+ * set the SDRAM TR1 RDCLT value
+ */
+ tr1 &= ~SDRAM_TR1_RDCT_MASK;
+ while (max_end >= (dly_val<<1)) {
+ max_end -= (dly_val<<1);
+ max_start -= (dly_val<<1);
+ }
+
+ rdclt_average = ((max_start + max_end) >> 1);
+ if (rdclt_average >= 0x60)
+ while(1);
+
+ if (rdclt_average < 0) {
+ rdclt_average = 0;
+ }
+
+ if (rdclt_average >= dly_val) {
+ rdclt_average -= dly_val;
+ tr1 = tr1 ^ SDRAM_TR1_RDCD_MASK;
+ }
+ tr1 |= SDRAM_TR1_RDCT_ENCODE(rdclt_average);
+
+#if 0
+ printf("tr1: %x\n", tr1);
+#endif
+ /*
+ * program SDRAM Timing Register 1 TR1
+ */
+ mtsdram(mem_tr1, tr1);
+}
+
+unsigned long program_bxcr(unsigned long* dimm_populated,
+ unsigned char* iic0_dimm_addr,
+ unsigned long num_dimm_banks)
+{
+ unsigned long dimm_num;
+ unsigned long bxcr_num;
+ unsigned long bank_base_addr;
+ unsigned long bank_size_bytes;
+ unsigned long cr;
+ unsigned long i;
+ unsigned long temp;
+ unsigned char num_row_addr;
+ unsigned char num_col_addr;
+ unsigned char num_banks;
+ unsigned char bank_size_id;
+
+
+ /*
+ * Set the BxCR regs. First, wipe out the bank config registers.
+ */
+ for (bxcr_num = 0; bxcr_num < MAXBXCR; bxcr_num++) {
+ mtdcr(memcfga, mem_b0cr + (bxcr_num << 2));
+ mtdcr(memcfgd, 0x00000000);
+ }
+
+ /*
+ * reset the bank_base address
+ */
+ bank_base_addr = CFG_SDRAM_BASE;
+
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ if (dimm_populated[dimm_num] == TRUE) {
+ num_row_addr = spd_read(iic0_dimm_addr[dimm_num], 3);
+ num_col_addr = spd_read(iic0_dimm_addr[dimm_num], 4);
+ num_banks = spd_read(iic0_dimm_addr[dimm_num], 5);
+ bank_size_id = spd_read(iic0_dimm_addr[dimm_num], 31);
+
+ /*
+ * Set the SDRAM0_BxCR regs
+ */
+ cr = 0;
+ bank_size_bytes = 4 * 1024 * 1024 * bank_size_id;
+ switch (bank_size_id) {
+ case 0x02:
+ cr |= SDRAM_BXCR_SDSZ_8;
+ break;
+ case 0x04:
+ cr |= SDRAM_BXCR_SDSZ_16;
+ break;
+ case 0x08:
+ cr |= SDRAM_BXCR_SDSZ_32;
+ break;
+ case 0x10:
+ cr |= SDRAM_BXCR_SDSZ_64;
+ break;
+ case 0x20:
+ cr |= SDRAM_BXCR_SDSZ_128;
+ break;
+ case 0x40:
+ cr |= SDRAM_BXCR_SDSZ_256;
+ break;
+ case 0x80:
+ cr |= SDRAM_BXCR_SDSZ_512;
+ break;
+ default:
+ printf("DDR-SDRAM: DIMM %lu BxCR configuration.\n",
+ dimm_num);
+ printf("ERROR: Unsupported value for the banksize: %d.\n",
+ bank_size_id);
+ printf("Replace the DIMM module with a supported DIMM.\n\n");
+ hang();
+ }
+
+ switch (num_col_addr) {
+ case 0x08:
+ cr |= SDRAM_BXCR_SDAM_1;
+ break;
+ case 0x09:
+ cr |= SDRAM_BXCR_SDAM_2;
+ break;
+ case 0x0A:
+ cr |= SDRAM_BXCR_SDAM_3;
+ break;
+ case 0x0B:
+ cr |= SDRAM_BXCR_SDAM_4;
+ break;
+ default:
+ printf("DDR-SDRAM: DIMM %lu BxCR configuration.\n",
+ dimm_num);
+ printf("ERROR: Unsupported value for number of "
+ "column addresses: %d.\n", num_col_addr);
+ printf("Replace the DIMM module with a supported DIMM.\n\n");
+ hang();
+ }
+
+ /*
+ * enable the bank
+ */
+ cr |= SDRAM_BXCR_SDBE;
+
+ /*------------------------------------------------------------------
+ | This next section is hardware dependent and must be programmed
+ | to match the hardware.
+ +-----------------------------------------------------------------*/
+ if (dimm_num == 0) {
+ for (i = 0; i < num_banks; i++) {
+ mtdcr(memcfga, mem_b0cr + (i << 2));
+ temp = mfdcr(memcfgd) & ~(SDRAM_BXCR_SDBA_MASK |
+ SDRAM_BXCR_SDSZ_MASK |
+ SDRAM_BXCR_SDAM_MASK |
+ SDRAM_BXCR_SDBE);
+ cr |= temp;
+ cr |= bank_base_addr & SDRAM_BXCR_SDBA_MASK;
+ mtdcr(memcfgd, cr);
+ bank_base_addr += bank_size_bytes;
+ }
+ }
+ else {
+ for (i = 0; i < num_banks; i++) {
+ mtdcr(memcfga, mem_b2cr + (i << 2));
+ temp = mfdcr(memcfgd) & ~(SDRAM_BXCR_SDBA_MASK |
+ SDRAM_BXCR_SDSZ_MASK |
+ SDRAM_BXCR_SDAM_MASK |
+ SDRAM_BXCR_SDBE);
+ cr |= temp;
+ cr |= bank_base_addr & SDRAM_BXCR_SDBA_MASK;
+ mtdcr(memcfgd, cr);
+ bank_base_addr += bank_size_bytes;
+ }
+ }
+ }
+ }
+
+ return(bank_base_addr);
+}
+
+void program_ecc (unsigned long num_bytes)
+{
+ unsigned long bank_base_addr;
+ unsigned long current_address;
+ unsigned long end_address;
+ unsigned long address_increment;
+ unsigned long cfg0;
+
+ /*
+ * get Memory Controller Options 0 data
+ */
+ mfsdram(mem_cfg0, cfg0);
+
+ /*
+ * reset the bank_base address
+ */
+ bank_base_addr = CFG_SDRAM_BASE;
+
+ if ((cfg0 & SDRAM_CFG0_MCHK_MASK) != SDRAM_CFG0_MCHK_NON) {
+ mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) |
+ SDRAM_CFG0_MCHK_GEN);
+
+ if ((cfg0 & SDRAM_CFG0_DMWD_MASK) == SDRAM_CFG0_DMWD_32) {
+ address_increment = 4;
+ }
+ else {
+ address_increment = 8;
+ }
+
+ current_address = (unsigned long)(bank_base_addr);
+ end_address = (unsigned long)(bank_base_addr) + num_bytes;
+
+ while (current_address < end_address) {
+ *((unsigned long*)current_address) = 0x00000000;
+ current_address += address_increment;
+ }
+
+ mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) |
+ SDRAM_CFG0_MCHK_CHK);
+ }
+}
+
+#endif /* CONFIG_440 */
+
+#endif /* CONFIG_SPD_EEPROM */
diff --git a/cpu/sa1100/serial.c b/cpu/sa1100/serial.c
new file mode 100644
index 0000000..68bcd1f
--- /dev/null
+++ b/cpu/sa1100/serial.c
@@ -0,0 +1,158 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <SA-1100.h>
+
+void serial_setbrg (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ unsigned int reg = 0;
+
+ if (gd->baudrate == 1200)
+ reg = 191;
+ else if (gd->baudrate == 9600)
+ reg = 23;
+ else if (gd->baudrate == 19200)
+ reg = 11;
+ else if (gd->baudrate == 38400)
+ reg = 5;
+ else if (gd->baudrate == 57600)
+ reg = 3;
+ else if (gd->baudrate == 115200)
+ reg = 1;
+ else
+ hang ();
+
+#ifdef CONFIG_SERIAL1
+ /* Wait until port is ready ... */
+ while (Ser1UTSR1 & UTSR1_TBY) {
+ }
+
+ /* init serial serial 1 */
+ Ser1UTCR3 = 0x00;
+ Ser1UTSR0 = 0xff;
+ Ser1UTCR0 = (UTCR0_1StpBit | UTCR0_8BitData);
+ Ser1UTCR1 = 0;
+ Ser1UTCR2 = (u32) reg;
+ Ser1UTCR3 = (UTCR3_RXE | UTCR3_TXE);
+#elif CONFIG_SERIAL3
+ /* Wait until port is ready ... */
+ while (Ser3UTSR1 & UTSR1_TBY) {
+ }
+
+ /* init serial serial 3 */
+ Ser3UTCR3 = 0x00;
+ Ser3UTSR0 = 0xff;
+ Ser3UTCR0 = (UTCR0_1StpBit | UTCR0_8BitData);
+ Ser3UTCR1 = 0;
+ Ser3UTCR2 = (u32) reg;
+ Ser3UTCR3 = (UTCR3_RXE | UTCR3_TXE);
+#else
+#error "Bad: you didn't configured serial ..."
+#endif
+}
+
+
+/*
+ * Initialise the serial port with the given baudrate. The settings
+ * are always 8 data bits, no parity, 1 stop bit, no start bits.
+ *
+ */
+int serial_init (void)
+{
+ serial_setbrg ();
+
+ return (0);
+}
+
+
+/*
+ * Output a single byte to the serial port.
+ */
+void serial_putc (const char c)
+{
+#ifdef CONFIG_SERIAL1
+ /* wait for room in the tx FIFO on SERIAL1 */
+ while ((Ser1UTSR0 & UTSR0_TFS) == 0);
+
+ Ser1UTDR = c;
+#elif CONFIG_SERIAL3
+ /* wait for room in the tx FIFO on SERIAL3 */
+ while ((Ser3UTSR0 & UTSR0_TFS) == 0);
+
+ Ser3UTDR = c;
+#endif
+
+ /* If \n, also do \r */
+ if (c == '\n')
+ serial_putc ('\r');
+}
+
+/*
+ * Read a single byte from the serial port. Returns 1 on success, 0
+ * otherwise. When the function is succesfull, the character read is
+ * written into its argument c.
+ */
+int serial_tstc (void)
+{
+#ifdef CONFIG_SERIAL1
+ return Ser1UTSR1 & UTSR1_RNE;
+#elif CONFIG_SERIAL3
+ return Ser3UTSR1 & UTSR1_RNE;
+#endif
+}
+
+/*
+ * Read a single byte from the serial port. Returns 1 on success, 0
+ * otherwise. When the function is succesfull, the character read is
+ * written into its argument c.
+ */
+int serial_getc (void)
+{
+#ifdef CONFIG_SERIAL1
+ while (!(Ser1UTSR1 & UTSR1_RNE));
+
+ return (char) Ser1UTDR & 0xff;
+#elif CONFIG_SERIAL3
+ while (!(Ser3UTSR1 & UTSR1_RNE));
+
+ return (char) Ser3UTDR & 0xff;
+#endif
+}
+
+void
+serial_puts (const char *s)
+{
+ while (*s) {
+ serial_putc (*s++);
+ }
+}
diff --git a/cpu/sa1100/start.S b/cpu/sa1100/start.S
new file mode 100644
index 0000000..c0f30f5
--- /dev/null
+++ b/cpu/sa1100/start.S
@@ -0,0 +1,422 @@
+/*
+ * armboot - Startup Code for SA1100 CPU
+ *
+ * Copyright (C) 1998 Dan Malek <dmalek@jlc.net>
+ * Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
+ * Copyright (C) 2000 Wolfgang Denk <wd@denx.de>
+ * Copyright (c) 2001 Alex Züpke <azu@sysgo.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+
+
+#include <config.h>
+#include <version.h>
+
+
+/*
+ *************************************************************************
+ *
+ * Jump vector table as in table 3.1 in [1]
+ *
+ *************************************************************************
+ */
+
+
+.globl _start
+_start: b reset
+ ldr pc, _undefined_instruction
+ ldr pc, _software_interrupt
+ ldr pc, _prefetch_abort
+ ldr pc, _data_abort
+ ldr pc, _not_used
+ ldr pc, _irq
+ ldr pc, _fiq
+
+_undefined_instruction: .word undefined_instruction
+_software_interrupt: .word software_interrupt
+_prefetch_abort: .word prefetch_abort
+_data_abort: .word data_abort
+_not_used: .word not_used
+_irq: .word irq
+_fiq: .word fiq
+
+ .balignl 16,0xdeadbeef
+
+
+/*
+ *************************************************************************
+ *
+ * Startup Code (reset vector)
+ *
+ * do important init only if we don't start from memory!
+ * relocate armboot to ram
+ * setup stack
+ * jump to second stage
+ *
+ *************************************************************************
+ */
+
+/*
+ * CFG_MEM_END is in the board dependent config-file (configs/config_BOARD.h)
+ */
+_TEXT_BASE:
+ .word TEXT_BASE
+
+.globl _armboot_start
+_armboot_start:
+ .word _start
+
+/*
+ * Note: _armboot_end_data and _armboot_end are defined
+ * by the (board-dependent) linker script.
+ * _armboot_end_data is the first usable FLASH address after armboot
+ */
+.globl _armboot_end_data
+_armboot_end_data:
+ .word armboot_end_data
+.globl _armboot_end
+_armboot_end:
+ .word armboot_end
+
+/*
+ * _armboot_real_end is the first usable RAM address behind armboot
+ * and the various stacks
+ */
+.globl _armboot_real_end
+_armboot_real_end:
+ .word 0x0badc0de
+
+#ifdef CONFIG_USE_IRQ
+/* IRQ stack memory (calculated at run-time) */
+.globl IRQ_STACK_START
+IRQ_STACK_START:
+ .word 0x0badc0de
+
+/* IRQ stack memory (calculated at run-time) */
+.globl FIQ_STACK_START
+FIQ_STACK_START:
+ .word 0x0badc0de
+#endif
+
+
+/*
+ * the actual reset code
+ */
+
+reset:
+ /*
+ * set the cpu to SVC32 mode
+ */
+ mrs r0,cpsr
+ bic r0,r0,#0x1f
+ orr r0,r0,#0x13
+ msr cpsr,r0
+
+ /*
+ * we do sys-critical inits only at reboot,
+ * not when booting from ram!
+ */
+#ifdef CONFIG_INIT_CRITICAL
+ bl cpu_init_crit
+#endif
+
+relocate:
+ /*
+ * relocate armboot to RAM
+ */
+ adr r0, _start /* r0 <- current position of code */
+ ldr r2, _armboot_start
+ ldr r3, _armboot_end
+ sub r2, r3, r2 /* r2 <- size of armboot */
+ ldr r1, _TEXT_BASE /* r1 <- destination address */
+ add r2, r0, r2 /* r2 <- source end address */
+
+ /*
+ * r0 = source address
+ * r1 = target address
+ * r2 = source end address
+ */
+copy_loop:
+ ldmia r0!, {r3-r10}
+ stmia r1!, {r3-r10}
+ cmp r0, r2
+ ble copy_loop
+
+ /* set up the stack */
+ ldr r0, _armboot_end
+ add r0, r0, #CONFIG_STACKSIZE
+ sub sp, r0, #12 /* leave 3 words for abort-stack */
+
+ ldr pc, _start_armboot
+
+_start_armboot: .word start_armboot
+
+
+/*
+ *************************************************************************
+ *
+ * CPU_init_critical registers
+ *
+ * setup important registers
+ * setup memory timing
+ *
+ *************************************************************************
+ */
+
+
+/* Interupt-Controller base address */
+IC_BASE: .word 0x90050000
+#define ICMR 0x04
+
+
+/* Reset-Controller */
+RST_BASE: .word 0x90030000
+#define RSRR 0x00
+#define RCSR 0x04
+
+
+/* PWR */
+PWR_BASE: .word 0x90020000
+#define PSPR 0x08
+#define PPCR 0x14
+cpuspeed: .word CFG_CPUSPEED
+
+
+cpu_init_crit:
+ /*
+ * mask all IRQs
+ */
+ ldr r0, IC_BASE
+ mov r1, #0x00
+ str r1, [r0, #ICMR]
+
+ /* set clock speed */
+ ldr r0, PWR_BASE
+ ldr r1, cpuspeed
+ str r1, [r0, #PPCR]
+
+ /*
+ * before relocating, we have to setup RAM timing
+ * because memory timing is board-dependend, you will
+ * find a memsetup.S in your board directory.
+ */
+ mov ip, lr
+ bl memsetup
+ mov lr, ip
+
+ /*
+ * disable MMU stuff and enable I-cache
+ */
+ mrc p15,0,r0,c1,c0
+ bic r0, r0, #0x00002000 @ clear bit 13 (X)
+ bic r0, r0, #0x0000000f @ clear bits 3-0 (WCAM)
+ orr r0, r0, #0x00001000 @ set bit 12 (I) Icache
+ orr r0, r0, #0x00000002 @ set bit 2 (A) Align
+ mcr p15,0,r0,c1,c0
+
+ /*
+ * flush v4 I/D caches
+ */
+ mov r0, #0
+ mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */
+ mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
+
+ mov pc, lr
+
+
+
+
+/*
+ *************************************************************************
+ *
+ * Interrupt handling
+ *
+ *************************************************************************
+ */
+
+@
+@ IRQ stack frame.
+@
+#define S_FRAME_SIZE 72
+
+#define S_OLD_R0 68
+#define S_PSR 64
+#define S_PC 60
+#define S_LR 56
+#define S_SP 52
+
+#define S_IP 48
+#define S_FP 44
+#define S_R10 40
+#define S_R9 36
+#define S_R8 32
+#define S_R7 28
+#define S_R6 24
+#define S_R5 20
+#define S_R4 16
+#define S_R3 12
+#define S_R2 8
+#define S_R1 4
+#define S_R0 0
+
+#define MODE_SVC 0x13
+#define I_BIT 0x80
+
+/*
+ * use bad_save_user_regs for abort/prefetch/undef/swi ...
+ * use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling
+ */
+
+ .macro bad_save_user_regs
+ sub sp, sp, #S_FRAME_SIZE
+ stmia sp, {r0 - r12} @ Calling r0-r12
+ add r8, sp, #S_PC
+
+ ldr r2, _armboot_end
+ add r2, r2, #CONFIG_STACKSIZE
+ sub r2, r2, #8
+ ldmia r2, {r2 - r4} @ get pc, cpsr, old_r0
+ add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
+
+ add r5, sp, #S_SP
+ mov r1, lr
+ stmia r5, {r0 - r4} @ save sp_SVC, lr_SVC, pc, cpsr, old_r
+ mov r0, sp
+ .endm
+
+ .macro irq_save_user_regs
+ sub sp, sp, #S_FRAME_SIZE
+ stmia sp, {r0 - r12} @ Calling r0-r12
+ add r8, sp, #S_PC
+ stmdb r8, {sp, lr}^ @ Calling SP, LR
+ str lr, [r8, #0] @ Save calling PC
+ mrs r6, spsr
+ str r6, [r8, #4] @ Save CPSR
+ str r0, [r8, #8] @ Save OLD_R0
+ mov r0, sp
+ .endm
+
+ .macro irq_restore_user_regs
+ ldmia sp, {r0 - lr}^ @ Calling r0 - lr
+ mov r0, r0
+ ldr lr, [sp, #S_PC] @ Get PC
+ add sp, sp, #S_FRAME_SIZE
+ subs pc, lr, #4 @ return & move spsr_svc into cpsr
+ .endm
+
+ .macro get_bad_stack
+ ldr r13, _armboot_end @ setup our mode stack
+ add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack
+ sub r13, r13, #8
+
+ str lr, [r13] @ save caller lr / spsr
+ mrs lr, spsr
+ str lr, [r13, #4]
+
+ mov r13, #MODE_SVC @ prepare SVC-Mode
+ msr spsr_c, r13
+ mov lr, pc
+ movs pc, lr
+ .endm
+
+ .macro get_irq_stack @ setup IRQ stack
+ ldr sp, IRQ_STACK_START
+ .endm
+
+ .macro get_fiq_stack @ setup FIQ stack
+ ldr sp, FIQ_STACK_START
+ .endm
+
+/*
+ * exception handlers
+ */
+ .align 5
+undefined_instruction:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_undefined_instruction
+
+ .align 5
+software_interrupt:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_software_interrupt
+
+ .align 5
+prefetch_abort:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_prefetch_abort
+
+ .align 5
+data_abort:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_data_abort
+
+ .align 5
+not_used:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_not_used
+
+#ifdef CONFIG_USE_IRQ
+
+ .align 5
+irq:
+ get_irq_stack
+ irq_save_user_regs
+ bl do_irq
+ irq_restore_user_regs
+
+ .align 5
+fiq:
+ get_fiq_stack
+ /* someone ought to write a more effiction fiq_save_user_regs */
+ irq_save_user_regs
+ bl do_fiq
+ irq_restore_user_regs
+
+#else
+
+ .align 5
+irq:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_irq
+
+ .align 5
+fiq:
+ get_bad_stack
+ bad_save_user_regs
+ bl do_fiq
+
+#endif
+
+ .align 5
+.globl reset_cpu
+reset_cpu:
+ ldr r0, RST_BASE
+ mov r1, #0x0 @ set bit 3-0 ...
+ str r1, [r0, #RCSR] @ ... to clear in RCSR
+ mov r1, #0x1
+ str r1, [r0, #RSRR] @ and perform reset
+ b reset_cpu @ silly, but repeat endlessly