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
plat_ea_handler(unsigned int ea_reason,uint64_t syndrome,void * cookie,void * handle,uint64_t flags)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
