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  1. /*
  2.  * Copyright (c) 2006 Jakub Jermar
  3.  * Copyright (c) 2009 Pavel Rimsky
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /** @addtogroup sparc64
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #include <smp/smp.h>
  37. #include <genarch/ofw/ofw_tree.h>
  38. #include <cpu.h>
  39. #include <arch/cpu.h>
  40. #include <arch/boot/boot.h>
  41. #include <arch.h>
  42. #include <config.h>
  43. #include <macros.h>
  44. #include <arch/types.h>
  45. #include <synch/synch.h>
  46. #include <synch/waitq.h>
  47. #include <print.h>
  48. #include <arch/sun4v/hypercall.h>
  49. #include <arch/sun4v/md.h>
  50. #include <time/delay.h>
  51.  
  52. #define CPU_STATE_RUNNING   2
  53.  
  54. extern void kernel_image_start(void);
  55. extern void *trap_table;
  56.  
  57. /** Determine number of processors. */
  58. void smp_init(void)
  59. {
  60.     md_node_t node = md_get_root();
  61.     count_t cpu_count = 0;
  62.  
  63.     /* walk through MD, find the current CPU node & its clock-frequency */
  64.     while(md_next_node(&node, "cpu")) {
  65.         cpu_count++;
  66.     }
  67.  
  68.     config.cpu_count = cpu_count;
  69. }
  70.  
  71.  
  72. /** Wake application processors up. */
  73. void kmp(void *arg)
  74. {
  75.     (void) arg;
  76.  
  77.     uint64_t myid;
  78.     __hypercall_fast_ret1(0, 0, 0, 0, 0, CPU_MYID, &myid);
  79.  
  80.     /* stop the CPUs before making them execute our code */
  81.     uint64_t i;
  82.     for (i = 0; i < config.cpu_count; i++) {
  83.         if (i == myid)
  84.             continue;
  85.  
  86.         if (__hypercall_fast1(CPU_STOP, i) != 0)
  87.             continue;
  88.  
  89.         uint64_t state;
  90.         __hypercall_fast_ret1(i, 0, 0, 0, 0, CPU_STATE, &state);
  91.         while (state == CPU_STATE_RUNNING) {
  92.             __hypercall_fast_ret1(i, 0, 0, 0, 0, CPU_STATE, &state);
  93.         }
  94.     }
  95.  
  96.     /* wake the processors up, one by one */
  97.     uint64_t state;
  98.     for (i = 1; i < config.cpu_count; i++) {
  99.         __hypercall_fast_ret1(i, 0, 0, 0, 0, CPU_STATE, &state);
  100.         printf("Starting CPU %d, error code = %d.\n", i, __hypercall_fast4(
  101.             CPU_START,
  102.             i,
  103.             (uint64_t) KA2PA(kernel_image_start),
  104.             KA2PA(trap_table),
  105.             bootinfo.physmem_start         
  106.         ));
  107.  
  108.         if (waitq_sleep_timeout(&ap_completion_wq, 10000000, SYNCH_FLAGS_NONE) ==
  109.                     ESYNCH_TIMEOUT)
  110.             printf("%s: waiting for processor (cpuid = %" PRIu32
  111.                 ") timed out\n", __func__, i);
  112.        
  113.     }
  114.  
  115. }
  116.  
  117. /** @}
  118.  */
  119.