1 /*
2 * Copyright (c) 2020 Antony Pavlov <antonynpavlov@gmail.com>
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8 #include <zephyr/sys/printk.h>
9 #include <zephyr/logging/log.h>
10 LOG_MODULE_DECLARE(os, CONFIG_KERNEL_LOG_LEVEL);
11
z_mips_fatal_error(unsigned int reason,const z_arch_esf_t * esf)12 FUNC_NORETURN void z_mips_fatal_error(unsigned int reason,
13 const z_arch_esf_t *esf)
14 {
15 if (esf != NULL) {
16 printk("$ 0 : (ze) %08lx(at) %08lx(v0) %08lx(v1)\n",
17 esf->at, esf->v0, esf->v1);
18 printk("$ 4 : %08lx(a0) %08lx(a1) %08lx(a2) %08lx(a3)\n",
19 esf->a0, esf->a1, esf->a2, esf->a3);
20 printk("$ 8 : %08lx(t0) %08lx(t1) %08lx(t2) %08lx(t3)\n",
21 esf->t0, esf->t1, esf->t2, esf->t3);
22 printk("$12 : %08lx(t4) %08lx(t5) %08lx(t6) %08lx(t7)\n",
23 esf->t4, esf->t5, esf->t6, esf->t7);
24 printk("...\n");
25 printk("$24 : %08lx(t8) %08lx(t9)\n",
26 esf->t8, esf->t9);
27 printk("$28 : %08lx(gp) (sp) (s8) %08lx(ra)\n",
28 esf->gp, esf->ra);
29
30 printk("EPC : %08lx\n", esf->epc);
31
32 printk("Status: %08lx\n", esf->status);
33 printk("Cause : %08lx\n", esf->cause);
34 printk("BadVA : %08lx\n", esf->badvaddr);
35 }
36
37 z_fatal_error(reason, esf);
38 CODE_UNREACHABLE;
39 }
40
cause_str(unsigned long cause)41 static char *cause_str(unsigned long cause)
42 {
43 switch (cause) {
44 case 0:
45 return "interrupt pending";
46 case 1:
47 return "TLB modified";
48 case 2:
49 return "TLB miss on load or ifetch";
50 case 3:
51 return "TLB miss on store";
52 case 4:
53 return "address error on load or ifetch";
54 case 5:
55 return "address error on store";
56 case 6:
57 return "bus error on ifetch";
58 case 7:
59 return "bus error on load or store";
60 case 8:
61 return "system call";
62 case 9:
63 return "breakpoint";
64 case 10:
65 return "reserved instruction";
66 case 11:
67 return "coprocessor unusable";
68 case 12:
69 return "arithmetic overflow";
70 case 13:
71 return "trap instruction";
72 case 14:
73 return "virtual coherency instruction";
74 case 15:
75 return "floating point";
76 case 16:
77 return "iwatch";
78 case 23:
79 return "dwatch";
80 case 31:
81 return "virtual coherency data";
82 default:
83 return "unknown";
84 }
85 }
86
_Fault(z_arch_esf_t * esf)87 void _Fault(z_arch_esf_t *esf)
88 {
89 unsigned long cause;
90
91 cause = (read_c0_cause() & CAUSE_EXP_MASK) >> CAUSE_EXP_SHIFT;
92
93 LOG_ERR("");
94 LOG_ERR(" cause: %ld, %s", cause, cause_str(cause));
95
96 z_mips_fatal_error(K_ERR_CPU_EXCEPTION, esf);
97 }
98
