| /* |
| * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <common/bl_common.h> |
| #include <el3_common_macros.S> |
| |
| .globl bl2_entrypoint |
| .globl bl2_el3_run_image |
| .globl bl2_run_next_image |
| |
| func bl2_entrypoint |
| /* Save arguments x0-x3 from previous Boot loader */ |
| mov x20, x0 |
| mov x21, x1 |
| mov x22, x2 |
| mov x23, x3 |
| |
| el3_entrypoint_common \ |
| _init_sctlr=1 \ |
| _warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \ |
| _secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \ |
| _init_memory=1 \ |
| _init_c_runtime=1 \ |
| _exception_vectors=bl2_el3_exceptions \ |
| _pie_fixup_size=0 |
| |
| /* --------------------------------------------- |
| * Restore parameters of boot rom |
| * --------------------------------------------- |
| */ |
| mov x0, x20 |
| mov x1, x21 |
| mov x2, x22 |
| mov x3, x23 |
| |
| /* --------------------------------------------- |
| * Perform BL2 setup |
| * --------------------------------------------- |
| */ |
| bl bl2_el3_setup |
| |
| #if ENABLE_PAUTH |
| /* --------------------------------------------- |
| * Program APIAKey_EL1 and enable pointer authentication. |
| * --------------------------------------------- |
| */ |
| bl pauth_init_enable_el3 |
| #endif /* ENABLE_PAUTH */ |
| |
| /* --------------------------------------------- |
| * Jump to main function. |
| * --------------------------------------------- |
| */ |
| bl bl2_main |
| |
| /* --------------------------------------------- |
| * Should never reach this point. |
| * --------------------------------------------- |
| */ |
| no_ret plat_panic_handler |
| endfunc bl2_entrypoint |
| |
| func bl2_run_next_image |
| mov x20,x0 |
| /* --------------------------------------------- |
| * MMU needs to be disabled because both BL2 and BL31 execute |
| * in EL3, and therefore share the same address space. |
| * BL31 will initialize the address space according to its |
| * own requirement. |
| * --------------------------------------------- |
| */ |
| bl disable_mmu_icache_el3 |
| tlbi alle3 |
| bl bl2_el3_plat_prepare_exit |
| |
| #if ENABLE_PAUTH |
| /* --------------------------------------------- |
| * Disable pointer authentication before jumping |
| * to next boot image. |
| * --------------------------------------------- |
| */ |
| bl pauth_disable_el3 |
| #endif /* ENABLE_PAUTH */ |
| |
| ldp x0, x1, [x20, #ENTRY_POINT_INFO_PC_OFFSET] |
| msr elr_el3, x0 |
| msr spsr_el3, x1 |
| |
| ldp x6, x7, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x30)] |
| ldp x4, x5, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x20)] |
| ldp x2, x3, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x10)] |
| ldp x0, x1, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x0)] |
| eret |
| endfunc bl2_run_next_image |