msp_smp.c 2.1 KB

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  1. /*
  2. * Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc.
  3. * Copyright (C) 2001 Ralf Baechle
  4. * Copyright (C) 2010 PMC-Sierra, Inc.
  5. *
  6. * VSMP support for MSP platforms . Derived from malta vsmp support.
  7. *
  8. * This program is free software; you can distribute it and/or modify it
  9. * under the terms of the GNU General Public License (Version 2) as
  10. * published by the Free Software Foundation.
  11. *
  12. * This program is distributed in the hope it will be useful, but WITHOUT
  13. * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14. * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  15. * for more details.
  16. *
  17. * You should have received a copy of the GNU General Public License along
  18. * with this program; if not, write to the Free Software Foundation, Inc.,
  19. * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  20. *
  21. */
  22. #include <linux/smp.h>
  23. #include <linux/interrupt.h>
  24. #include <asm/setup.h>
  25. #ifdef CONFIG_MIPS_MT_SMP
  26. #define MIPS_CPU_IPI_RESCHED_IRQ 0 /* SW int 0 for resched */
  27. #define MIPS_CPU_IPI_CALL_IRQ 1 /* SW int 1 for call */
  28. static void ipi_resched_dispatch(void)
  29. {
  30. do_IRQ(MIPS_CPU_IPI_RESCHED_IRQ);
  31. }
  32. static void ipi_call_dispatch(void)
  33. {
  34. do_IRQ(MIPS_CPU_IPI_CALL_IRQ);
  35. }
  36. static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
  37. {
  38. return IRQ_HANDLED;
  39. }
  40. static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
  41. {
  42. generic_smp_call_function_interrupt();
  43. return IRQ_HANDLED;
  44. }
  45. static struct irqaction irq_resched = {
  46. .handler = ipi_resched_interrupt,
  47. .flags = IRQF_PERCPU,
  48. .name = "IPI_resched"
  49. };
  50. static struct irqaction irq_call = {
  51. .handler = ipi_call_interrupt,
  52. .flags = IRQF_PERCPU,
  53. .name = "IPI_call"
  54. };
  55. void __init arch_init_ipiirq(int irq, struct irqaction *action)
  56. {
  57. setup_irq(irq, action);
  58. irq_set_handler(irq, handle_percpu_irq);
  59. }
  60. void __init msp_vsmp_int_init(void)
  61. {
  62. set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
  63. set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
  64. arch_init_ipiirq(MIPS_CPU_IPI_RESCHED_IRQ, &irq_resched);
  65. arch_init_ipiirq(MIPS_CPU_IPI_CALL_IRQ, &irq_call);
  66. }
  67. #endif /* CONFIG_MIPS_MT_SMP */