1*91f16700Schasinglulu /* 2*91f16700Schasinglulu * Copyright (c) 2023, Arm Limited. All rights reserved. 3*91f16700Schasinglulu * 4*91f16700Schasinglulu * SPDX-License-Identifier: BSD-3-Clause 5*91f16700Schasinglulu */ 6*91f16700Schasinglulu 7*91f16700Schasinglulu #include <inttypes.h> 8*91f16700Schasinglulu #include <stdint.h> 9*91f16700Schasinglulu 10*91f16700Schasinglulu #include <arch_helpers.h> 11*91f16700Schasinglulu #include <bl31/ea_handle.h> 12*91f16700Schasinglulu #include <common/bl_common.h> 13*91f16700Schasinglulu #include <common/debug.h> 14*91f16700Schasinglulu #include <context.h> 15*91f16700Schasinglulu #include <lib/el3_runtime/context_mgmt.h> 16*91f16700Schasinglulu #include <plat/common/platform.h> 17*91f16700Schasinglulu 18*91f16700Schasinglulu /* 19*91f16700Schasinglulu * This source file with custom plat_ea_handler function is compiled only when 20*91f16700Schasinglulu * building TF-A with compile option PLATFORM_TEST_EA_FFH 21*91f16700Schasinglulu */ 22*91f16700Schasinglulu 23*91f16700Schasinglulu /* Test address(non-existent) used in tftf to cause External aborts */ 24*91f16700Schasinglulu #define TEST_ADDRESS UL(0x7FFFF000) 25*91f16700Schasinglulu 26*91f16700Schasinglulu void plat_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie, 27*91f16700Schasinglulu void *handle, uint64_t flags) 28*91f16700Schasinglulu { 29*91f16700Schasinglulu #ifdef PLATFORM_TEST_EA_FFH 30*91f16700Schasinglulu u_register_t elr_el3; 31*91f16700Schasinglulu u_register_t fault_address; 32*91f16700Schasinglulu cpu_context_t *ctx = cm_get_context(NON_SECURE); 33*91f16700Schasinglulu el3_state_t *el3_ctx = get_el3state_ctx(ctx); 34*91f16700Schasinglulu gp_regs_t *gpregs_ctx = get_gpregs_ctx(ctx); 35*91f16700Schasinglulu unsigned int level = (unsigned int)GET_EL(read_spsr_el3()); 36*91f16700Schasinglulu 37*91f16700Schasinglulu fault_address = read_ctx_reg(gpregs_ctx, CTX_GPREG_X0); 38*91f16700Schasinglulu 39*91f16700Schasinglulu if ((level < MODE_EL3) && (fault_address == TEST_ADDRESS)) { 40*91f16700Schasinglulu if (ea_reason == ERROR_EA_SYNC) { 41*91f16700Schasinglulu INFO("Handled sync EA from lower EL at address 0x%lx\n", fault_address); 42*91f16700Schasinglulu /* To avoid continuous faults, forward return address */ 43*91f16700Schasinglulu elr_el3 = read_ctx_reg(el3_ctx, CTX_ELR_EL3); 44*91f16700Schasinglulu elr_el3 += 4; 45*91f16700Schasinglulu write_ctx_reg(el3_ctx, CTX_ELR_EL3, elr_el3); 46*91f16700Schasinglulu return; 47*91f16700Schasinglulu } else if (ea_reason == ERROR_EA_ASYNC) { 48*91f16700Schasinglulu INFO("Handled Serror from lower EL at address 0x%lx\n", fault_address); 49*91f16700Schasinglulu return; 50*91f16700Schasinglulu } 51*91f16700Schasinglulu } 52*91f16700Schasinglulu #endif 53*91f16700Schasinglulu plat_default_ea_handler(ea_reason, syndrome, cookie, handle, flags); 54*91f16700Schasinglulu } 55