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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 <arch/drivers/fhc.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 <genarch/kbd/z8530.h>
  47.  
  48. /** Register Interrupt Level Handler.
  49.  *
  50.  * @param n Interrupt Level (1 - 15).
  51.  * @param name Short descriptive string.
  52.  * @param f Handler.
  53.  */
  54. void interrupt_register(int n, const char *name, iroutine f)
  55. {
  56.     ASSERT(n >= IVT_FIRST && n <= IVT_ITEMS);
  57.    
  58.     exc_register(n - 1, name, f);
  59. }
  60.  
  61. /* Reregister irq to be IPC-ready */
  62. void irq_ipc_bind_arch(unative_t irq)
  63. {
  64. #ifdef CONFIG_Z8530
  65.     z8530_belongs_to_kernel = false;
  66. #endif
  67. }
  68.  
  69. void interrupt(int n, istate_t *istate)
  70. {
  71.     uint64_t intrcv;
  72.     uint64_t data0;
  73.  
  74.     intrcv = asi_u64_read(ASI_INTR_RECEIVE, 0);
  75.     data0 = asi_u64_read(ASI_UDB_INTR_R, ASI_UDB_INTR_R_DATA_0);
  76.  
  77.     switch (data0) {
  78. #ifdef CONFIG_Z8530
  79.     case Z8530_INTRCV_DATA0:
  80.         /*
  81.          * So far, we know we got this interrupt through the FHC.
  82.          * Since we don't have enough information about the FHC and
  83.          * because the interrupt looks like level sensitive,
  84.          * we cannot handle it by scheduling one of the level
  85.          * interrupt traps. Call the interrupt handler directly.
  86.          */
  87.  
  88.         if (z8530_belongs_to_kernel)
  89.             z8530_interrupt();
  90.         else
  91.             ipc_irq_send_notif(0);
  92.         fhc_uart_reset();
  93.         break;
  94.  
  95. #endif
  96.     }
  97.  
  98.     membar();
  99.     asi_u64_write(ASI_INTR_RECEIVE, 0, 0);
  100. }
  101.  
  102. /** @}
  103.  */
  104.