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#include <cpu_func.h>
   9#include <irq_func.h>
  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
  19struct 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
  32int interrupt_init(void)
  33{
  34        enable_interrupts();
  35
  36        return 0;
  37}
  38
  39void enable_interrupts(void)
  40{
  41        return;
  42}
  43
  44int disable_interrupts(void)
  45{
  46        return 0;
  47}
  48
  49void 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
  59void bad_mode(void)
  60{
  61        panic("Resetting CPU ...\n");
  62        reset_cpu(0);
  63}
  64
  65void do_hard_fault(struct autosave_regs *autosave_regs)
  66{
  67        printf("Hard fault\n");
  68        dump_regs(autosave_regs);
  69        bad_mode();
  70}
  71
  72void 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
  79void do_bus_fault(struct autosave_regs *autosave_regs)
  80{
  81        printf("Bus fault\n");
  82        dump_regs(autosave_regs);
  83        bad_mode();
  84}
  85
  86void do_usage_fault(struct autosave_regs *autosave_regs)
  87{
  88        printf("Usage fault\n");
  89        dump_regs(autosave_regs);
  90        bad_mode();
  91}
  92
  93void do_invalid_entry(struct autosave_regs *autosave_regs)
  94{
  95        printf("Exception\n");
  96        dump_regs(autosave_regs);
  97        bad_mode();
  98}
  99