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