1 // SPDX-License-Identifier: GPL-2.0+
4 * Kamil Lulko, <kamil.lulko@gmail.com>
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.
19 struct autosave_regs {
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]
32 int interrupt_init(void)
37 void enable_interrupts(void)
42 int disable_interrupts(void)
47 void dump_regs(struct autosave_regs *regs)
49 printf("pc : %08lx lr : %08lx xPSR : %08lx\n",
50 regs->ARM_PC, regs->ARM_LR, regs->ARM_XPSR);
51 printf("r12 : %08lx r3 : %08lx r2 : %08lx\n"
52 "r1 : %08lx r0 : %08lx\n",
53 regs->ARM_R12, regs->ARM_R3, regs->ARM_R2,
54 regs->ARM_R1, regs->ARM_R0);
59 panic("Resetting CPU ...\n");
63 void do_hard_fault(struct autosave_regs *autosave_regs)
65 printf("Hard fault\n");
66 dump_regs(autosave_regs);
70 void do_mm_fault(struct autosave_regs *autosave_regs)
72 printf("Memory management fault\n");
73 dump_regs(autosave_regs);
77 void do_bus_fault(struct autosave_regs *autosave_regs)
79 printf("Bus fault\n");
80 dump_regs(autosave_regs);
84 void do_usage_fault(struct autosave_regs *autosave_regs)
86 printf("Usage fault\n");
87 dump_regs(autosave_regs);
91 void do_invalid_entry(struct autosave_regs *autosave_regs)
93 printf("Exception\n");
94 dump_regs(autosave_regs);