LXR uboot/arch/arm/lib/interrupts

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