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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
12d8a729 | 2 | /* |
3 | * (C) Copyright 2015 | |
5be93569 | 4 | * Kamil Lulko, <kamil.lulko@gmail.com> |
12d8a729 | 5 | */ |
6 | ||
d678a59d | 7 | #include <common.h> |
9a3b4ceb | 8 | #include <cpu_func.h> |
c30b7adb | 9 | #include <irq_func.h> |
12d8a729 | 10 | |
11 | /* | |
12 | * Upon exception entry ARMv7-M processors automatically save stack | |
13 | * frames containing some registers. For simplicity initial | |
14 | * implementation uses only this auto-saved stack frame. | |
15 | * This does not contain complete register set dump, | |
16 | * only R0-R3, R12, LR, PC and xPSR are saved. | |
17 | */ | |
18 | ||
19 | struct autosave_regs { | |
20 | long uregs[8]; | |
21 | }; | |
22 | ||
23 | #define ARM_XPSR uregs[7] | |
24 | #define ARM_PC uregs[6] | |
25 | #define ARM_LR uregs[5] | |
26 | #define ARM_R12 uregs[4] | |
27 | #define ARM_R3 uregs[3] | |
28 | #define ARM_R2 uregs[2] | |
29 | #define ARM_R1 uregs[1] | |
30 | #define ARM_R0 uregs[0] | |
31 | ||
32 | int interrupt_init(void) | |
33 | { | |
5cf9e3b2 OP |
34 | enable_interrupts(); |
35 | ||
12d8a729 | 36 | return 0; |
37 | } | |
38 | ||
39 | void enable_interrupts(void) | |
40 | { | |
41 | return; | |
42 | } | |
43 | ||
44 | int disable_interrupts(void) | |
45 | { | |
46 | return 0; | |
47 | } | |
48 | ||
49 | void dump_regs(struct autosave_regs *regs) | |
50 | { | |
51 | printf("pc : %08lx lr : %08lx xPSR : %08lx\n", | |
52 | regs->ARM_PC, regs->ARM_LR, regs->ARM_XPSR); | |
53 | printf("r12 : %08lx r3 : %08lx r2 : %08lx\n" | |
54 | "r1 : %08lx r0 : %08lx\n", | |
55 | regs->ARM_R12, regs->ARM_R3, regs->ARM_R2, | |
56 | regs->ARM_R1, regs->ARM_R0); | |
57 | } | |
58 | ||
59 | void bad_mode(void) | |
60 | { | |
61 | panic("Resetting CPU ...\n"); | |
35b65dd8 | 62 | reset_cpu(); |
12d8a729 | 63 | } |
64 | ||
65 | void do_hard_fault(struct autosave_regs *autosave_regs) | |
66 | { | |
67 | printf("Hard fault\n"); | |
68 | dump_regs(autosave_regs); | |
69 | bad_mode(); | |
70 | } | |
71 | ||
72 | void do_mm_fault(struct autosave_regs *autosave_regs) | |
73 | { | |
74 | printf("Memory management fault\n"); | |
75 | dump_regs(autosave_regs); | |
76 | bad_mode(); | |
77 | } | |
78 | ||
79 | void do_bus_fault(struct autosave_regs *autosave_regs) | |
80 | { | |
81 | printf("Bus fault\n"); | |
82 | dump_regs(autosave_regs); | |
83 | bad_mode(); | |
84 | } | |
85 | ||
86 | void do_usage_fault(struct autosave_regs *autosave_regs) | |
87 | { | |
88 | printf("Usage fault\n"); | |
89 | dump_regs(autosave_regs); | |
90 | bad_mode(); | |
91 | } | |
92 | ||
93 | void do_invalid_entry(struct autosave_regs *autosave_regs) | |
94 | { | |
95 | printf("Exception\n"); | |
96 | dump_regs(autosave_regs); | |
97 | bad_mode(); | |
98 | } |