1/* 2 * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7#include <arch.h> 8#include <el3_common_macros.S> 9 10 .globl bl1_entrypoint 11 12 13 /* ----------------------------------------------------- 14 * bl1_entrypoint() is the entry point into the trusted 15 * firmware code when a cpu is released from warm or 16 * cold reset. 17 * ----------------------------------------------------- 18 */ 19 20func bl1_entrypoint 21 /* --------------------------------------------------------------------- 22 * If the reset address is programmable then bl1_entrypoint() is 23 * executed only on the cold boot path. Therefore, we can skip the warm 24 * boot mailbox mechanism. 25 * --------------------------------------------------------------------- 26 */ 27 el3_entrypoint_common \ 28 _init_sctlr=1 \ 29 _warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \ 30 _secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \ 31 _init_memory=1 \ 32 _init_c_runtime=1 \ 33 _exception_vectors=bl1_exceptions 34 35 /* -------------------------------------------------------------------- 36 * Perform BL1 setup 37 * -------------------------------------------------------------------- 38 */ 39 bl bl1_setup 40 41 /* -------------------------------------------------------------------- 42 * Enable pointer authentication 43 * -------------------------------------------------------------------- 44 */ 45#if ENABLE_PAUTH 46 mrs x0, sctlr_el3 47 orr x0, x0, #SCTLR_EnIA_BIT 48 msr sctlr_el3, x0 49 isb 50#endif /* ENABLE_PAUTH */ 51 52 /* -------------------------------------------------------------------- 53 * Initialize platform and jump to our c-entry point 54 * for this type of reset. 55 * -------------------------------------------------------------------- 56 */ 57 bl bl1_main 58 59 /* -------------------------------------------------------------------- 60 * Disable pointer authentication before jumping to BL31 or that will 61 * cause an authentication failure during the early platform init. 62 * -------------------------------------------------------------------- 63 */ 64#if ENABLE_PAUTH 65 mrs x0, sctlr_el3 66 bic x0, x0, #SCTLR_EnIA_BIT 67 msr sctlr_el3, x0 68 isb 69#endif /* ENABLE_PAUTH */ 70 71 /* -------------------------------------------------- 72 * Do the transition to next boot image. 73 * -------------------------------------------------- 74 */ 75 b el3_exit 76endfunc bl1_entrypoint 77