1 /*
2 * Copyright (c) 2025 Renesas Electronics Corporation
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 /**
8 * @file
9 * @brief Fatal fault handling
10 *
11 * This module implements the routines necessary for handling fatal faults on
12 * RX CPUs.
13 */
14
15 #include <zephyr/kernel.h>
16 #include <zephyr/arch/cpu.h>
17 #include <kernel_arch_data.h>
18 #include <zephyr/logging/log.h>
19 #include <zephyr/irq.h>
20 LOG_MODULE_DECLARE(os, CONFIG_KERNEL_LOG_LEVEL);
21
22 #ifdef CONFIG_EXCEPTION_DEBUG
dump_rx_esf(const struct arch_esf * esf)23 static void dump_rx_esf(const struct arch_esf *esf)
24 {
25 EXCEPTION_DUMP(" ACC_L: 0x%08x ACC_H: 0x%08x", esf->acc_l, esf->acc_h);
26 EXCEPTION_DUMP(" r1: 0x%08x r2: 0x%08x r3: 0x%08x",
27 esf->r1, esf->r2, esf->r3);
28 EXCEPTION_DUMP(" r4: 0x%08x r5: 0x%08x r6: 0x%08x",
29 esf->r4, esf->r5, esf->r6);
30 EXCEPTION_DUMP(" r7: 0x%08x r8: 0x%08x r9: 0x%08x",
31 esf->r7, esf->r8, esf->r9);
32 EXCEPTION_DUMP(" r10: 0x%08x r11: 0x%08x r12: 0x%08x",
33 esf->r10, esf->r11, esf->r12);
34 EXCEPTION_DUMP(" r13: 0x%08x r14: 0x%08x r15: 0x%08x",
35 esf->r13, esf->r14, esf->r15);
36 EXCEPTION_DUMP(" PC: 0x%08x PSW: 0x%08x", esf->entry_point, esf->psw);
37 }
38 #endif
39
z_rx_fatal_error(unsigned int reason,const struct arch_esf * esf)40 void z_rx_fatal_error(unsigned int reason, const struct arch_esf *esf)
41 {
42 #ifdef CONFIG_EXCEPTION_DEBUG
43 if (esf != NULL) {
44 dump_rx_esf(esf);
45 }
46 #endif /* CONFIG_EXCEPTION_DEBUG */
47
48 z_fatal_error(reason, esf);
49 }
arch_system_halt(unsigned int reason)50 FUNC_NORETURN void arch_system_halt(unsigned int reason)
51 {
52 ARG_UNUSED(reason);
53
54 __asm__("brk");
55
56 CODE_UNREACHABLE;
57 }
58