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  1. /*
  2.  * Copyright (c) 2006 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 sparc64
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <smp/ipi.h>
  36. #include <cpu.h>
  37. #include <config.h>
  38. #include <interrupt.h>
  39. #include <arch/asm.h>
  40. #include <arch/cpu.h>
  41. #include <arch/sun4v/hypercall.h>
  42. #include <arch/sun4v/ipi.h>
  43.  
  44. #define IPI_MESSAGE_SIZE    8
  45.  
  46. static uint64_t data[MAX_NUM_STRANDS][IPI_MESSAGE_SIZE]
  47.     __attribute__ ((aligned (64)));
  48.  
  49. static uint16_t ipi_cpu_list[MAX_NUM_STRANDS][MAX_NUM_STRANDS];
  50.  
  51. /**
  52.  * Sends an inter-processor interrupt to all virtual processors whose IDs are
  53.  * listed in the list.
  54.  *
  55.  * @param func      address of the function to be invoked on the recipient
  56.  * @param cpu_list  list of CPU IDs (16-bit identifiers) of the recipients
  57.  * @param list_size number of recipients (number of valid cpu_list entries)
  58.  *
  59.  * @return      error code returned by the CPU_MONDO_SEND hypercall
  60.  */
  61. uint64_t ipi_brodcast_to(void (*func)(void), uint16_t cpu_list[MAX_NUM_STRANDS],
  62.         uint64_t list_size) {
  63.  
  64.     data[CPU->arch.id][0] = (uint64_t) func;
  65.  
  66.     unsigned int i;
  67.     for (i = 0; i < list_size; i++) {
  68.         ipi_cpu_list[CPU->arch.id][i] = cpu_list[i];
  69.     }
  70.  
  71.     return __hypercall_fast3(CPU_MONDO_SEND, list_size,
  72.         KA2PA(ipi_cpu_list[CPU->arch.id]), KA2PA(data[CPU->arch.id]));
  73. }
  74.  
  75. /**
  76.  * Send an inter-processor interrupt to a particular CPU.
  77.  *
  78.  * @param func      address of the function to be invoked on the recipient
  79.  * @param cpu_is    CPU ID (16-bit identifier) of the recipient
  80.  *
  81.  * @return      error code returned by the CPU_MONDO_SEND hypercall
  82.  */
  83. uint64_t ipi_unicast_to(void (*func)(void), uint16_t cpu_id) {
  84.     ipi_cpu_list[CPU->arch.id][0] = cpu_id;
  85.     return ipi_brodcast_to(func, ipi_cpu_list[CPU->arch.id], 1);
  86. }
  87.  
  88. /*
  89.  * Deliver IPI to all processors except the current one.
  90.  *
  91.  * We assume that interrupts are disabled.
  92.  *
  93.  * @param ipi IPI number.
  94.  */
  95. void ipi_broadcast_arch(int ipi)
  96. {
  97.     void (* func)(void);
  98.    
  99.     switch (ipi) {
  100.     case IPI_TLB_SHOOTDOWN:
  101.         func = tlb_shootdown_ipi_recv;
  102.         break;
  103.     default:
  104.         panic("Unknown IPI (%d).\n", ipi);
  105.         break;
  106.     }
  107.  
  108.     unsigned int i;
  109.     unsigned idx = 0;
  110.     for (i = 0; i < config.cpu_active; i++) {
  111.         if (&cpus[i] == CPU) {
  112.             continue;
  113.         }
  114.  
  115.         ipi_cpu_list[CPU->id][idx] = (uint16_t) cpus[i].id;
  116.         idx++;
  117.     }
  118.  
  119.     ipi_brodcast_to(func, ipi_cpu_list[CPU->arch.id], idx);
  120. }
  121.  
  122. /** @}
  123.  */
  124.