1 /* 2 * Copyright (c) 2023, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <inttypes.h> 8 #include <stdint.h> 9 10 #include <arch_helpers.h> 11 #include <bl31/ea_handle.h> 12 #include <common/bl_common.h> 13 #include <common/debug.h> 14 #include <context.h> 15 #include <lib/el3_runtime/context_mgmt.h> 16 #include <plat/common/platform.h> 17 18 /* 19 * This source file with custom plat_ea_handler function is compiled only when 20 * building TF-A with compile option PLATFORM_TEST_EA_FFH 21 */ 22 23 /* Test address(non-existent) used in tftf to cause External aborts */ 24 #define TEST_ADDRESS UL(0x7FFFF000) 25 26 void plat_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie, 27 void *handle, uint64_t flags) 28 { 29 #ifdef PLATFORM_TEST_EA_FFH 30 u_register_t elr_el3; 31 u_register_t fault_address; 32 cpu_context_t *ctx = cm_get_context(NON_SECURE); 33 el3_state_t *el3_ctx = get_el3state_ctx(ctx); 34 gp_regs_t *gpregs_ctx = get_gpregs_ctx(ctx); 35 unsigned int level = (unsigned int)GET_EL(read_spsr_el3()); 36 37 fault_address = read_ctx_reg(gpregs_ctx, CTX_GPREG_X0); 38 39 if ((level < MODE_EL3) && (fault_address == TEST_ADDRESS)) { 40 if (ea_reason == ERROR_EA_SYNC) { 41 INFO("Handled sync EA from lower EL at address 0x%lx\n", fault_address); 42 /* To avoid continuous faults, forward return address */ 43 elr_el3 = read_ctx_reg(el3_ctx, CTX_ELR_EL3); 44 elr_el3 += 4; 45 write_ctx_reg(el3_ctx, CTX_ELR_EL3, elr_el3); 46 return; 47 } else if (ea_reason == ERROR_EA_ASYNC) { 48 INFO("Handled Serror from lower EL at address 0x%lx\n", fault_address); 49 return; 50 } 51 } 52 #endif 53 plat_default_ea_handler(ea_reason, syndrome, cookie, handle, flags); 54 } 55