interrupts.c 2.8 KB

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  1. /*
  2. * (C) Copyright 2001
  3. * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
  4. *
  5. * See file CREDITS for list of people who contributed to this
  6. * project.
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License as
  10. * published by the Free Software Foundation; either version 2 of
  11. * the License, or (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21. * MA 02111-1307 USA
  22. */
  23. /*
  24. * interrupts.c - just enough support for the decrementer/timer
  25. */
  26. #include <common.h>
  27. #include <mpc8xx.h>
  28. #include <mpc8xx_irq.h>
  29. #include <asm/processor.h>
  30. #include <commproc.h>
  31. #include <command.h>
  32. int interrupt_init_cpu (unsigned *decrementer_count)
  33. {
  34. #if defined(DEBUG) && !defined(CONFIG_AMIGAONEG3SE)
  35. printf("interrupt_init: GT main cause reg: %08x:%08x\n",
  36. GTREGREAD(LOW_INTERRUPT_CAUSE_REGISTER),
  37. GTREGREAD(HIGH_INTERRUPT_CAUSE_REGISTER));
  38. printf("interrupt_init: ethernet cause regs: %08x %08x %08x\n",
  39. GTREGREAD(ETHERNET0_INTERRUPT_CAUSE_REGISTER),
  40. GTREGREAD(ETHERNET1_INTERRUPT_CAUSE_REGISTER),
  41. GTREGREAD(ETHERNET2_INTERRUPT_CAUSE_REGISTER));
  42. printf("interrupt_init: ethernet mask regs: %08x %08x %08x\n",
  43. GTREGREAD(ETHERNET0_INTERRUPT_MASK_REGISTER),
  44. GTREGREAD(ETHERNET1_INTERRUPT_MASK_REGISTER),
  45. GTREGREAD(ETHERNET2_INTERRUPT_MASK_REGISTER));
  46. puts("interrupt_init: setting decrementer_count\n");
  47. #endif
  48. *decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
  49. return (0);
  50. }
  51. /****************************************************************************/
  52. /*
  53. * Handle external interrupts
  54. */
  55. void
  56. external_interrupt(struct pt_regs *regs)
  57. {
  58. puts("external_interrupt (oops!)\n");
  59. }
  60. volatile ulong timestamp = 0;
  61. /*
  62. * timer_interrupt - gets called when the decrementer overflows,
  63. * with interrupts disabled.
  64. * Trivial implementation - no need to be really accurate.
  65. */
  66. void
  67. timer_interrupt_cpu (struct pt_regs *regs)
  68. {
  69. /* nothing to do here */
  70. return;
  71. }
  72. /****************************************************************************/
  73. /*
  74. * Install and free a interrupt handler.
  75. */
  76. void
  77. irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
  78. {
  79. }
  80. void
  81. irq_free_handler(int vec)
  82. {
  83. }
  84. /****************************************************************************/
  85. void
  86. do_irqinfo(cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
  87. {
  88. puts("IRQ related functions are unimplemented currently.\n");
  89. }