interrupts_m.c 1.8 KB

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