| Roberto Vargas | e0e9946 | 2017-10-30 14:43:43 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <arch.h> |
| 8 | #include <asm_macros.S> |
| 9 | #include <bl_common.h> |
| 10 | #include <el3_common_macros.S> |
| 11 | |
| 12 | .globl bl2_entrypoint |
| 13 | .globl bl2_vector_table |
| 14 | .globl bl2_el3_run_image |
| 15 | .globl bl2_run_next_image |
| 16 | |
| 17 | func bl2_entrypoint |
| 18 | /* Save arguments x0-x3 from previous Boot loader */ |
| 19 | mov x20, x0 |
| 20 | mov x21, x1 |
| 21 | mov x22, x2 |
| 22 | mov x23, x3 |
| 23 | |
| 24 | el3_entrypoint_common \ |
| 25 | _init_sctlr=1 \ |
| 26 | _warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \ |
| 27 | _secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \ |
| 28 | _init_memory=1 \ |
| 29 | _init_c_runtime=1 \ |
| 30 | _exception_vectors=bl2_el3_exceptions |
| 31 | |
| 32 | /* |
| 33 | * Restore parameters of boot rom |
| 34 | */ |
| 35 | mov x0, x20 |
| 36 | mov x1, x21 |
| 37 | mov x2, x22 |
| 38 | mov x3, x23 |
| 39 | |
| 40 | bl bl2_el3_early_platform_setup |
| 41 | bl bl2_el3_plat_arch_setup |
| 42 | |
| 43 | /* --------------------------------------------- |
| 44 | * Jump to main function. |
| 45 | * --------------------------------------------- |
| 46 | */ |
| 47 | bl bl2_main |
| 48 | |
| 49 | /* --------------------------------------------- |
| 50 | * Should never reach this point. |
| 51 | * --------------------------------------------- |
| 52 | */ |
| 53 | no_ret plat_panic_handler |
| 54 | endfunc bl2_entrypoint |
| 55 | |
| 56 | func bl2_run_next_image |
| 57 | mov x20,x0 |
| 58 | /* |
| 59 | * MMU needs to be disabled because both BL2 and BL31 execute |
| 60 | * in EL3, and therefore share the same address space. |
| 61 | * BL31 will initialize the address space according to its |
| 62 | * own requirement. |
| 63 | */ |
| 64 | bl disable_mmu_icache_el3 |
| 65 | tlbi alle3 |
| 66 | bl bl2_el3_plat_prepare_exit |
| 67 | |
| 68 | ldp x0, x1, [x20, #ENTRY_POINT_INFO_PC_OFFSET] |
| 69 | msr elr_el3, x0 |
| 70 | msr spsr_el3, x1 |
| 71 | |
| 72 | ldp x6, x7, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x30)] |
| 73 | ldp x4, x5, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x20)] |
| 74 | ldp x2, x3, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x10)] |
| 75 | ldp x0, x1, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x0)] |
| 76 | eret |
| 77 | endfunc bl2_run_next_image |