1*fe38cc68SManish Pandey /* 2*fe38cc68SManish Pandey * Copyright (c) 2023, Arm Limited. All rights reserved. 3*fe38cc68SManish Pandey * 4*fe38cc68SManish Pandey * SPDX-License-Identifier: BSD-3-Clause 5*fe38cc68SManish Pandey */ 6*fe38cc68SManish Pandey 7*fe38cc68SManish Pandey #include <inttypes.h> 8*fe38cc68SManish Pandey #include <stdint.h> 9*fe38cc68SManish Pandey 10*fe38cc68SManish Pandey #include <arch_helpers.h> 11*fe38cc68SManish Pandey #include <bl31/ea_handle.h> 12*fe38cc68SManish Pandey #include <common/bl_common.h> 13*fe38cc68SManish Pandey #include <common/debug.h> 14*fe38cc68SManish Pandey #include <context.h> 15*fe38cc68SManish Pandey #include <lib/el3_runtime/context_mgmt.h> 16*fe38cc68SManish Pandey #include <plat/common/platform.h> 17*fe38cc68SManish Pandey 18*fe38cc68SManish Pandey /* 19*fe38cc68SManish Pandey * This source file with custom plat_ea_handler function is compiled only when 20*fe38cc68SManish Pandey * building TF-A with compile option PLATFORM_TEST_EA_FFH 21*fe38cc68SManish Pandey */ 22*fe38cc68SManish Pandey 23*fe38cc68SManish Pandey /* Test address(non-existent) used in tftf to cause External aborts */ 24*fe38cc68SManish Pandey #define TEST_ADDRESS UL(0x7FFFF000) 25*fe38cc68SManish Pandey 26*fe38cc68SManish Pandey void plat_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie, 27*fe38cc68SManish Pandey void *handle, uint64_t flags) 28*fe38cc68SManish Pandey { 29*fe38cc68SManish Pandey #ifdef PLATFORM_TEST_EA_FFH 30*fe38cc68SManish Pandey u_register_t elr_el3; 31*fe38cc68SManish Pandey u_register_t fault_address; 32*fe38cc68SManish Pandey cpu_context_t *ctx = cm_get_context(NON_SECURE); 33*fe38cc68SManish Pandey el3_state_t *el3_ctx = get_el3state_ctx(ctx); 34*fe38cc68SManish Pandey gp_regs_t *gpregs_ctx = get_gpregs_ctx(ctx); 35*fe38cc68SManish Pandey unsigned int level = (unsigned int)GET_EL(read_spsr_el3()); 36*fe38cc68SManish Pandey 37*fe38cc68SManish Pandey fault_address = read_ctx_reg(gpregs_ctx, CTX_GPREG_X0); 38*fe38cc68SManish Pandey 39*fe38cc68SManish Pandey if ((level < MODE_EL3) && (fault_address == TEST_ADDRESS)) { 40*fe38cc68SManish Pandey if (ea_reason == ERROR_EA_SYNC) { 41*fe38cc68SManish Pandey INFO("Handled sync EA from lower EL at address 0x%lx\n", fault_address); 42*fe38cc68SManish Pandey /* To avoid continuous faults, forward return address */ 43*fe38cc68SManish Pandey elr_el3 = read_ctx_reg(el3_ctx, CTX_ELR_EL3); 44*fe38cc68SManish Pandey elr_el3 += 4; 45*fe38cc68SManish Pandey write_ctx_reg(el3_ctx, CTX_ELR_EL3, elr_el3); 46*fe38cc68SManish Pandey return; 47*fe38cc68SManish Pandey } else if (ea_reason == ERROR_EA_ASYNC) { 48*fe38cc68SManish Pandey INFO("Handled Serror from lower EL at address 0x%lx\n", fault_address); 49*fe38cc68SManish Pandey return; 50*fe38cc68SManish Pandey } 51*fe38cc68SManish Pandey } 52*fe38cc68SManish Pandey #endif 53*fe38cc68SManish Pandey plat_default_ea_handler(ea_reason, syndrome, cookie, handle, flags); 54*fe38cc68SManish Pandey } 55