kernel/arch/sparc64/src/trap/interrupt.c

   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
  50 /*
  51  * To be removed once we get rid of the dependency in ipc_irq_bind_arch().
  52  */
  53 #include <arch/drivers/kbd.h>
  54 #include <genarch/kbd/z8530.h>
  55
  56 /** Register Interrupt Level Handler.
  57  *
  58  * @param n Interrupt Level (1 - 15).
  59  * @param name Short descriptive string.
  60  * @param f Handler.
  61  */
  62 void interrupt_register(int n, const char *name, iroutine f)
  63 {
  64         ASSERT(n >= IVT_FIRST && n <= IVT_ITEMS);
  65
  66         exc_register(n - 1, name, f);
  67 }
  68
  69 /* Reregister irq to be IPC-ready */
  70 void irq_ipc_bind_arch(unative_t irq)
  71 {
  72 #ifdef CONFIG_Z8530
  73         if (kbd_type == KBD_Z8530)
  74                 z8530_belongs_to_kernel = false;
  75 #endif
  76 }
  77
  78 /** Process hardware interrupt.
  79  *
  80  * @param n Ignored.
  81  * @param istate Ignored.
  82  */
  83 void interrupt(int n, istate_t *istate)
  84 {
  85         uint64_t intrcv;
  86         uint64_t data0;
  87
  88         intrcv = asi_u64_read(ASI_INTR_RECEIVE, 0);
  89         data0 = asi_u64_read(ASI_UDB_INTR_R, ASI_UDB_INTR_R_DATA_0);
  90
  91         irq_t *irq = irq_dispatch(data0);
  92         if (irq) {
  93                 /*
  94                  * The IRQ handler was found.
  95                  */
  96                 irq->handler(irq, irq->arg);
  97         } else if (data0 > config.base) {
  98                 /*
  99                  * This is a cross-call.
 100                  * data0 contains address of kernel function.
 101                  * We call the function only after we verify
 102                  * it is on of the supported ones.
 103                  */
 104 #ifdef CONFIG_SMP
 105                 if (data0 == (uintptr_t) tlb_shootdown_ipi_recv) {
 106                         tlb_shootdown_ipi_recv();
 107                 }
 108 #endif
 109         } else {
 110                 /*
 111                  * Spurious interrupt.
 112                  */
 113 #ifdef CONFIG_DEBUG
 114                 printf("cpu%d: spurious interrupt (intrcv=%#llx, data0=%#llx)\n", CPU->id, intrcv, data0);
 115 #endif
 116         }
 117
 118         membar();
 119         asi_u64_write(ASI_INTR_RECEIVE, 0, 0);
 120 }
 121
 122 /** @}
 123  */