LXR uboot/arch/arm/lib/interrupts

   1/*
   2 * (C) Copyright 2015
   3 * Kamil Lulko, <kamil.lulko@gmail.com>
   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
  18struct 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
  31int interrupt_init(void)
  32{
  33        return 0;
  34}
  35
  36void enable_interrupts(void)
  37{
  38        return;
  39}
  40
  41int disable_interrupts(void)
  42{
  43        return 0;
  44}
  45
  46void 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
  56void bad_mode(void)
  57{
  58        panic("Resetting CPU ...\n");
  59        reset_cpu(0);
  60}
  61
  62void do_hard_fault(struct autosave_regs *autosave_regs)
  63{
  64        printf("Hard fault\n");
  65        dump_regs(autosave_regs);
  66        bad_mode();
  67}
  68
  69void 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
  76void do_bus_fault(struct autosave_regs *autosave_regs)
  77{
  78        printf("Bus fault\n");
  79        dump_regs(autosave_regs);
  80        bad_mode();
  81}
  82
  83void do_usage_fault(struct autosave_regs *autosave_regs)
  84{
  85        printf("Usage fault\n");
  86        dump_regs(autosave_regs);
  87        bad_mode();
  88}
  89
  90void do_invalid_entry(struct autosave_regs *autosave_regs)
  91{
  92        printf("Exception\n");
  93        dump_regs(autosave_regs);
  94        bad_mode();
  95}
  96