| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de> |
| * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com> |
| */ |
| |
| #include <asm-offsets.h> |
| #include <config.h> |
| #include <asm/cache.h> |
| |
| #define _START _start |
| #define _FAULT _fault |
| |
| |
| #define SAVE_ALL \ |
| move.w #0x2700,%sr; /* disable intrs */ \ |
| subl #60,%sp; /* space for 15 regs */ \ |
| moveml %d0-%d7/%a0-%a6,%sp@; \ |
| |
| #define RESTORE_ALL \ |
| moveml %sp@,%d0-%d7/%a0-%a6; \ |
| addl #60,%sp; /* space for 15 regs */ \ |
| rte |
| |
| /* If we come from a pre-loader we don't need an initial exception |
| * table. |
| */ |
| #if !defined(CONFIG_MONITOR_IS_IN_RAM) |
| |
| .text |
| |
| /* |
| * Vector table. This is used for initial platform startup. |
| * These vectors are to catch any un-intended traps. |
| */ |
| _vectors: |
| .long 0x00000000 /* Flash offset is 0 until we setup CS0 */ |
| #if defined(CONFIG_M5282) && (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) |
| .long _start - CONFIG_SYS_TEXT_BASE |
| #else |
| .long _START |
| #endif |
| |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| |
| #endif |
| |
| .text |
| |
| #if defined(CONFIG_SYS_INT_FLASH_BASE) && \ |
| (defined(CONFIG_M5282) || defined(CONFIG_M5281)) |
| #if (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) |
| .long 0x55AA55AA,0xAA55AA55 /* CFM Backdoorkey */ |
| .long 0xFFFFFFFF /* all sectors protected */ |
| .long 0x00000000 /* supervisor/User restriction */ |
| .long 0x00000000 /* programm/data space restriction */ |
| .long 0x00000000 /* Flash security */ |
| #endif |
| #endif |
| |
| .globl _start |
| _start: |
| nop |
| nop |
| move.w #0x2700,%sr |
| |
| #if defined(CONFIG_M5208) |
| /* Initialize RAMBAR: locate SRAM and validate it */ |
| move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 |
| movec %d0, %RAMBAR1 |
| #endif |
| |
| #if defined(CONFIG_M5272) || defined(CONFIG_M5249) || defined(CONFIG_M5253) |
| /* set MBAR address + valid flag */ |
| move.l #(CONFIG_SYS_MBAR + 1), %d0 |
| move.c %d0, %MBAR |
| |
| /*** The 5249 has MBAR2 as well ***/ |
| #ifdef CONFIG_SYS_MBAR2 |
| /* Get MBAR2 address */ |
| move.l #(CONFIG_SYS_MBAR2 + 1), %d0 |
| /* Set MBAR2 */ |
| movec %d0, #0xc0e |
| #endif |
| move.l #(CONFIG_SYS_INIT_RAM_ADDR + 1), %d0 |
| movec %d0, %RAMBAR0 |
| #endif /* CONFIG_M5272 || CONFIG_M5249 || CONFIG_M5253 */ |
| |
| #if defined(CONFIG_M5282) || defined(CONFIG_M5271) |
| /* set MBAR address + valid flag */ |
| move.l #(CONFIG_SYS_MBAR + 1), %d0 |
| move.l %d0, 0x40000000 |
| |
| /* Initialize RAMBAR1: locate SRAM and validate it */ |
| move.l #(CONFIG_SYS_INIT_RAM_ADDR + 0x21), %d0 |
| movec %d0, %RAMBAR1 |
| |
| #if defined(CONFIG_M5282) |
| #if (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) |
| /* |
| * Setup code in SRAM to initialize FLASHBAR, |
| * if start from internal Flash |
| */ |
| move.l #(_flashbar_setup-CONFIG_SYS_INT_FLASH_BASE), %a0 |
| move.l #(_flashbar_setup_end-CONFIG_SYS_INT_FLASH_BASE), %a1 |
| move.l #(CONFIG_SYS_INIT_RAM_ADDR), %a2 |
| _copy_flash: |
| move.l (%a0)+, (%a2)+ |
| cmp.l %a0, %a1 |
| bgt.s _copy_flash |
| jmp CONFIG_SYS_INIT_RAM_ADDR |
| |
| _flashbar_setup: |
| /* Initialize FLASHBAR: locate internal Flash and validate it */ |
| move.l #(CONFIG_SYS_INT_FLASH_BASE + CONFIG_SYS_INT_FLASH_ENABLE), %d0 |
| movec %d0, %FLASHBAR |
| jmp _after_flashbar_copy.L /* Force jump to absolute address */ |
| _flashbar_setup_end: |
| nop |
| _after_flashbar_copy: |
| #else |
| /* Setup code to initialize FLASHBAR, if start from external Memory */ |
| move.l #(CONFIG_SYS_INT_FLASH_BASE + CONFIG_SYS_INT_FLASH_ENABLE), %d0 |
| movec %d0, %FLASHBAR |
| #endif /* (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) */ |
| |
| #endif |
| #endif |
| /* |
| * if we come from a pre-loader we have no exception table and |
| * therefore no VBR to set |
| */ |
| #if !defined(CONFIG_MONITOR_IS_IN_RAM) |
| #if defined(CONFIG_M5282) && (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) |
| move.l #CONFIG_SYS_INT_FLASH_BASE, %d0 |
| #else |
| move.l #CONFIG_SYS_FLASH_BASE, %d0 |
| #endif |
| movec %d0, %VBR |
| #endif |
| |
| #ifdef CONFIG_M5275 |
| /* set MBAR address + valid flag */ |
| move.l #(CONFIG_SYS_MBAR + 1), %d0 |
| move.l %d0, 0x40000000 |
| /* movec %d0, %MBAR */ |
| |
| /* Initialize RAMBAR: locate SRAM and validate it */ |
| move.l #(CONFIG_SYS_INIT_RAM_ADDR + 0x21), %d0 |
| movec %d0, %RAMBAR1 |
| #endif |
| |
| /* initialize general use internal ram */ |
| move.l #0, %d0 |
| move.l #(ICACHE_STATUS), %a1 /* icache */ |
| move.l #(DCACHE_STATUS), %a2 /* icache */ |
| move.l %d0, (%a1) |
| move.l %d0, (%a2) |
| |
| /* put relocation table address to a5 */ |
| move.l #__got_start, %a5 |
| |
| /* setup stack initially on top of internal static ram */ |
| move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp |
| |
| /* |
| * if configured, malloc_f arena will be reserved first, |
| * then (and always) gd struct space will be reserved |
| */ |
| move.l %sp, -(%sp) |
| move.l #board_init_f_alloc_reserve, %a1 |
| jsr (%a1) |
| |
| /* update stack and frame-pointers */ |
| move.l %d0, %sp |
| move.l %sp, %fp |
| |
| /* initialize reserved area */ |
| move.l %d0, -(%sp) |
| move.l #board_init_f_init_reserve, %a1 |
| jsr (%a1) |
| |
| /* run low-level CPU init code (from flash) */ |
| move.l #cpu_init_f, %a1 |
| jsr (%a1) |
| |
| /* run low-level board init code (from flash) */ |
| clr.l %sp@- |
| move.l #board_init_f, %a1 |
| jsr (%a1) |
| |
| /* board_init_f() does not return */ |
| |
| /******************************************************************************/ |
| |
| /* |
| * void relocate_code(addr_sp, gd, addr_moni) |
| * |
| * This "function" does not return, instead it continues in RAM |
| * after relocating the monitor code. |
| * |
| * r3 = dest |
| * r4 = src |
| * r5 = length in bytes |
| * r6 = cachelinesize |
| */ |
| .globl relocate_code |
| relocate_code: |
| link.w %a6,#0 |
| move.l 8(%a6), %sp /* set new stack pointer */ |
| |
| move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ |
| move.l 16(%a6), %a0 /* Save copy of Destination Address */ |
| |
| move.l #CONFIG_SYS_MONITOR_BASE, %a1 |
| move.l #__init_end, %a2 |
| move.l %a0, %a3 |
| /* copy the code to RAM */ |
| 1: |
| move.l (%a1)+, (%a3)+ |
| cmp.l %a1,%a2 |
| bgt.s 1b |
| |
| /* |
| * We are done. Do not return, instead branch to second part of board |
| * initialization, now running from RAM. |
| */ |
| move.l %a0, %a1 |
| add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1 |
| jmp (%a1) |
| |
| in_ram: |
| |
| clear_bss: |
| /* |
| * Now clear BSS segment |
| */ |
| move.l %a0, %a1 |
| add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1 |
| move.l %a0, %d1 |
| add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1 |
| 6: |
| clr.l (%a1)+ |
| cmp.l %a1,%d1 |
| bgt.s 6b |
| |
| /* |
| * fix got table in RAM |
| */ |
| move.l %a0, %a1 |
| add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1 |
| move.l %a1,%a5 /* fix got pointer register a5 */ |
| |
| move.l %a0, %a2 |
| add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2 |
| |
| 7: |
| move.l (%a1),%d1 |
| sub.l #_start,%d1 |
| add.l %a0,%d1 |
| move.l %d1,(%a1)+ |
| cmp.l %a2, %a1 |
| bne 7b |
| |
| /* calculate relative jump to board_init_r in ram */ |
| move.l %a0, %a1 |
| add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1 |
| |
| /* set parameters for board_init_r */ |
| move.l %a0,-(%sp) /* dest_addr */ |
| move.l %d0,-(%sp) /* gd */ |
| jsr (%a1) |
| |
| /******************************************************************************/ |
| |
| /* exception code */ |
| .globl _fault |
| _fault: |
| bra _fault |
| |
| .globl _exc_handler |
| _exc_handler: |
| SAVE_ALL |
| movel %sp,%sp@- |
| bsr exc_handler |
| addql #4,%sp |
| RESTORE_ALL |
| |
| .globl _int_handler |
| _int_handler: |
| SAVE_ALL |
| movel %sp,%sp@- |
| bsr int_handler |
| addql #4,%sp |
| RESTORE_ALL |
| |
| /******************************************************************************/ |
| |
| .align 4 |