| /* |
| * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. |
| * |
| * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * Neither the name of ARM nor the names of its contributors may be used |
| * to endorse or promote products derived from this software without specific |
| * prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <gic_v2.h> |
| #include <platform.h> |
| #include "../drivers/pwrc/fvp_pwrc.h" |
| |
| .globl platform_get_entrypoint |
| .globl platform_cold_boot_init |
| .globl plat_secondary_cold_boot_setup |
| |
| |
| .macro platform_choose_gicmmap param1, param2, x_tmp, w_tmp, res |
| ldr \x_tmp, =VE_SYSREGS_BASE + V2M_SYS_ID |
| ldr \w_tmp, [\x_tmp] |
| ubfx \w_tmp, \w_tmp, #SYS_ID_BLD_SHIFT, #SYS_ID_BLD_LENGTH |
| cmp \w_tmp, #BLD_GIC_VE_MMAP |
| csel \res, \param1, \param2, eq |
| .endm |
| |
| /* ----------------------------------------------------- |
| * void plat_secondary_cold_boot_setup (void); |
| * |
| * This function performs any platform specific actions |
| * needed for a secondary cpu after a cold reset e.g |
| * mark the cpu's presence, mechanism to place it in a |
| * holding pen etc. |
| * TODO: Should we read the PSYS register to make sure |
| * that the request has gone through. |
| * ----------------------------------------------------- |
| */ |
| func plat_secondary_cold_boot_setup |
| /* --------------------------------------------- |
| * Power down this cpu. |
| * TODO: Do we need to worry about powering the |
| * cluster down as well here. That will need |
| * locks which we won't have unless an elf- |
| * loader zeroes out the zi section. |
| * --------------------------------------------- |
| */ |
| bl read_mpidr |
| ldr x1, =PWRC_BASE |
| str w0, [x1, #PPOFFR_OFF] |
| |
| /* --------------------------------------------- |
| * Deactivate the gic cpu interface as well |
| * --------------------------------------------- |
| */ |
| ldr x0, =VE_GICC_BASE |
| ldr x1, =BASE_GICC_BASE |
| platform_choose_gicmmap x0, x1, x2, w2, x1 |
| mov w0, #(IRQ_BYP_DIS_GRP1 | FIQ_BYP_DIS_GRP1) |
| orr w0, w0, #(IRQ_BYP_DIS_GRP0 | FIQ_BYP_DIS_GRP0) |
| str w0, [x1, #GICC_CTLR] |
| |
| /* --------------------------------------------- |
| * There is no sane reason to come out of this |
| * wfi so panic if we do. This cpu will be pow- |
| * ered on and reset by the cpu_on pm api |
| * --------------------------------------------- |
| */ |
| dsb sy |
| wfi |
| cb_panic: |
| b cb_panic |
| |
| |
| /* ----------------------------------------------------- |
| * void platform_get_entrypoint (unsigned int mpid); |
| * |
| * Main job of this routine is to distinguish between |
| * a cold and warm boot. |
| * On a cold boot the secondaries first wait for the |
| * platform to be initialized after which they are |
| * hotplugged in. The primary proceeds to perform the |
| * platform initialization. |
| * On a warm boot, each cpu jumps to the address in its |
| * mailbox. |
| * |
| * TODO: Not a good idea to save lr in a temp reg |
| * TODO: PSYSR is a common register and should be |
| * accessed using locks. Since its not possible |
| * to use locks immediately after a cold reset |
| * we are relying on the fact that after a cold |
| * reset all cpus will read the same WK field |
| * ----------------------------------------------------- |
| */ |
| func platform_get_entrypoint |
| mov x9, x30 // lr |
| mov x2, x0 |
| ldr x1, =PWRC_BASE |
| str w2, [x1, #PSYSR_OFF] |
| ldr w2, [x1, #PSYSR_OFF] |
| ubfx w2, w2, #PSYSR_WK_SHIFT, #PSYSR_WK_MASK |
| cbnz w2, warm_reset |
| mov x0, x2 |
| b exit |
| warm_reset: |
| /* --------------------------------------------- |
| * A per-cpu mailbox is maintained in the tru- |
| * sted DRAM. Its flushed out of the caches |
| * after every update using normal memory so |
| * its safe to read it here with SO attributes |
| * --------------------------------------------- |
| */ |
| ldr x10, =TZDRAM_BASE + MBOX_OFF |
| bl platform_get_core_pos |
| lsl x0, x0, #CACHE_WRITEBACK_SHIFT |
| ldr x0, [x10, x0] |
| cbz x0, _panic |
| exit: |
| ret x9 |
| _panic: b _panic |
| |
| |
| /* ----------------------------------------------------- |
| * void platform_mem_init (void); |
| * |
| * Zero out the mailbox registers in the TZDRAM. The |
| * mmu is turned off right now and only the primary can |
| * ever execute this code. Secondaries will read the |
| * mailboxes using SO accesses. In short, BL31 will |
| * update the mailboxes after mapping the tzdram as |
| * normal memory. It will flush its copy after update. |
| * BL1 will always read the mailboxes with the MMU off |
| * ----------------------------------------------------- |
| */ |
| func platform_mem_init |
| ldr x0, =TZDRAM_BASE + MBOX_OFF |
| stp xzr, xzr, [x0, #0] |
| stp xzr, xzr, [x0, #0x10] |
| stp xzr, xzr, [x0, #0x20] |
| stp xzr, xzr, [x0, #0x30] |
| ret |
| |
| |
| /* ----------------------------------------------------- |
| * void platform_cold_boot_init (bl1_main function); |
| * |
| * Routine called only by the primary cpu after a cold |
| * boot to perform early platform initialization |
| * ----------------------------------------------------- |
| */ |
| func platform_cold_boot_init |
| mov x20, x0 |
| bl platform_mem_init |
| bl read_mpidr |
| mov x19, x0 |
| |
| /* --------------------------------------------- |
| * Give ourselves a small coherent stack to |
| * ease the pain of initializing the MMU and |
| * CCI in assembler |
| * --------------------------------------------- |
| */ |
| bl platform_set_coherent_stack |
| |
| /* --------------------------------------------- |
| * Architectural init. can be generic e.g. |
| * enabling stack alignment and platform spec- |
| * ific e.g. MMU & page table setup as per the |
| * platform memory map. Perform the latter here |
| * and the former in bl1_main. |
| * --------------------------------------------- |
| */ |
| bl bl1_early_platform_setup |
| bl bl1_plat_arch_setup |
| |
| /* --------------------------------------------- |
| * Give ourselves a stack allocated in Normal |
| * -IS-WBWA memory |
| * --------------------------------------------- |
| */ |
| mov x0, x19 |
| bl platform_set_stack |
| |
| /* --------------------------------------------- |
| * Jump to the main function. Returning from it |
| * is a terminal error. |
| * --------------------------------------------- |
| */ |
| blr x20 |
| |
| cb_init_panic: |
| b cb_init_panic |