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  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup sparc64interrupt
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch/interrupt.h>
  36. #include <arch/trap/interrupt.h>
  37. #include <interrupt.h>
  38. #include <ddi/irq.h>
  39. #include <typedefs.h>
  40. #include <arch/types.h>
  41. #include <debug.h>
  42. #include <ipc/sysipc.h>
  43. #include <arch/asm.h>
  44. #include <arch/barrier.h>
  45. #include <print.h>
  46. #include <arch.h>
  47. #include <mm/tlb.h>
  48. #include <config.h>
  49. #include <synch/spinlock.h>
  50.  
  51. /*
  52.  * To be removed once we get rid of the dependency in ipc_irq_bind_arch().
  53.  */
  54. #include <arch/drivers/kbd.h>
  55. #include <genarch/kbd/z8530.h>
  56.  
  57. /** Register Interrupt Level Handler.
  58.  *
  59.  * @param n Interrupt Level (1 - 15).
  60.  * @param name Short descriptive string.
  61.  * @param f Handler.
  62.  */
  63. void interrupt_register(int n, const char *name, iroutine f)
  64. {
  65.     ASSERT(n >= IVT_FIRST && n <= IVT_ITEMS);
  66.    
  67.     exc_register(n - 1, name, f);
  68. }
  69.  
  70. /* Reregister irq to be IPC-ready */
  71. void irq_ipc_bind_arch(unative_t irq)
  72. {
  73. #ifdef CONFIG_Z8530
  74.     if (kbd_type == KBD_Z8530)
  75.         z8530_belongs_to_kernel = false;
  76. #endif
  77. }
  78.  
  79. /** Process hardware interrupt.
  80.  *
  81.  * @param n Ignored.
  82.  * @param istate Ignored.
  83.  */
  84. void interrupt(int n, istate_t *istate)
  85. {
  86.     uint64_t intrcv;
  87.     uint64_t data0;
  88.  
  89.     intrcv = asi_u64_read(ASI_INTR_RECEIVE, 0);
  90.     data0 = asi_u64_read(ASI_UDB_INTR_R, ASI_UDB_INTR_R_DATA_0);
  91.  
  92.     irq_t *irq = irq_dispatch_and_lock(data0);
  93.     if (irq) {
  94.         /*
  95.          * The IRQ handler was found.
  96.          */
  97.         irq->handler(irq, irq->arg);
  98.         spinlock_unlock(&irq->lock);
  99.     } else if (data0 > config.base) {
  100.         /*
  101.          * This is a cross-call.
  102.          * data0 contains address of kernel function.
  103.          * We call the function only after we verify
  104.          * it is on of the supported ones.
  105.          */
  106. #ifdef CONFIG_SMP
  107.         if (data0 == (uintptr_t) tlb_shootdown_ipi_recv) {
  108.             tlb_shootdown_ipi_recv();
  109.         }
  110. #endif
  111.     } else {
  112.         /*
  113.          * Spurious interrupt.
  114.          */
  115. #ifdef CONFIG_DEBUG
  116.         printf("cpu%d: spurious interrupt (intrcv=%#llx, data0=%#llx)\n", CPU->id, intrcv, data0);
  117. #endif
  118.     }
  119.  
  120.     membar();
  121.     asi_u64_write(ASI_INTR_RECEIVE, 0, 0);
  122. }
  123.  
  124. /** @}
  125.  */
  126.