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  1. /*
  2.  * Copyright (c) 2009 Pavel Rimsky
  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 <arch/sparc64.h>
  38. #include <arch/trap/interrupt.h>
  39. #include <interrupt.h>
  40. #include <ddi/irq.h>
  41. #include <arch/types.h>
  42. #include <debug.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. #include <arch/sun4v/hypercall.h>
  51.  
  52. /** number of uint64_t-s in one CPU mondo message */
  53. #define CPU_MONDO_ENTRY_SIZE    8
  54.  
  55. /** number of entries (messages) in the CPU mondo queue */
  56. #define CPU_MONDO_NENTRIES  8
  57.  
  58. /** number of uint64_t-s in the CPU mondo queue */
  59. #define CPU_MONDO_QUEUE_SIZE    ((CPU_MONDO_NENTRIES) * (CPU_MONDO_ENTRY_SIZE))
  60.  
  61. /** used to identify CPU mondo queue in the hypercall */
  62. #define CPU_MONDO_QUEUE_ID  0x3c
  63.  
  64. /** ASI for reading/writing CPU mondo head/tail registers */
  65. #define ASI_QUEUE       0x25
  66.  
  67. /** VA for reading the CPU mondo tail */
  68. #define VA_CPU_MONDO_QUEUE_TAIL 0x3c8
  69.  
  70. /** VA for reading/writing the CPU mondo head */
  71. #define VA_CPU_MONDO_QUEUE_HEAD 0x3c0
  72.  
  73. /**
  74.  * array which contains CPU mondo queue for every CPU
  75.  */
  76. uint64_t cpu_mondo_queues[MAX_NUM_STRANDS][CPU_MONDO_QUEUE_SIZE]
  77.     __attribute__((aligned(
  78.     CPU_MONDO_QUEUE_SIZE * sizeof(uint64_t))));
  79.  
  80. /**
  81.  * Initializes CPU mondo queue for the current CPU.
  82.  */
  83. void sun4v_ipi_init(void)
  84. {
  85.     if (__hypercall_fast3(
  86.         CPU_QCONF,
  87.         CPU_MONDO_QUEUE_ID,
  88.         KA2PA(cpu_mondo_queues[CPU->id]),
  89.         CPU_MONDO_NENTRIES) != EOK)
  90.             panic("Initializing mondo queue failed on CPU %d.\n",
  91.             CPU->arch.id);
  92. }
  93.  
  94. /**
  95.  * Handler of the CPU Mondo trap. Reads the message queue, updates the head
  96.  * register and processes the message (invokes a function call).
  97.  */
  98. void cpu_mondo(void)
  99. {
  100.     unsigned int tail = asi_u64_read(ASI_QUEUE, VA_CPU_MONDO_QUEUE_TAIL);
  101.     unsigned int head = asi_u64_read(ASI_QUEUE, VA_CPU_MONDO_QUEUE_HEAD);
  102.  
  103.     while (head != tail) {
  104.  
  105.         uint64_t data1 = cpu_mondo_queues[CPU->id][0];
  106.  
  107.         head = (head + CPU_MONDO_ENTRY_SIZE * sizeof(uint64_t)) %
  108.             (CPU_MONDO_QUEUE_SIZE * sizeof(uint64_t));
  109.         asi_u64_write(ASI_QUEUE, VA_CPU_MONDO_QUEUE_HEAD, head);
  110.  
  111.         if (data1 == (uint64_t) tlb_shootdown_ipi_recv) {
  112.             ((void (*)(void)) data1)();
  113.         } else {
  114.             printf("Spurious interrupt on %d, data = %lx.\n",
  115.                 CPU->arch.id, data1);
  116.         }
  117.  
  118.     }
  119.  
  120. }
  121.  
  122. /** @}
  123.  */
  124.