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| Rev | Author | Line No. | Line |
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| 3771 | rimsky | 1 | /* |
| 2 | * Copyright (c) 2006 Jakub Jermar |
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| 3 | * Copyright (c) 2009 Pavel Rimsky |
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| 4 | * All rights reserved. |
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| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions |
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| 8 | * are met: |
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| 9 | * |
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| 10 | * - Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * - Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * - The name of the author may not be used to endorse or promote products |
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| 16 | * derived from this software without specific prior written permission. |
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| 17 | * |
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 28 | */ |
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| 29 | |||
| 30 | /** @addtogroup sparc64 |
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| 31 | * @{ |
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| 32 | */ |
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| 33 | /** @file |
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| 34 | */ |
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| 35 | |||
| 36 | #include <smp/smp.h> |
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| 37 | #include <genarch/ofw/ofw_tree.h> |
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| 38 | #include <cpu.h> |
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| 39 | #include <arch/cpu.h> |
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| 4614 | rimsky | 40 | #include <arch/boot/boot.h> |
| 3771 | rimsky | 41 | #include <arch.h> |
| 42 | #include <config.h> |
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| 43 | #include <macros.h> |
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| 44 | #include <arch/types.h> |
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| 45 | #include <synch/synch.h> |
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| 46 | #include <synch/waitq.h> |
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| 47 | #include <print.h> |
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| 4614 | rimsky | 48 | #include <arch/sun4v/hypercall.h> |
| 49 | #include <arch/sun4v/md.h> |
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| 50 | #include <time/delay.h> |
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| 3771 | rimsky | 51 | |
| 4614 | rimsky | 52 | #define CPU_STATE_RUNNING 2 |
| 53 | |||
| 54 | extern void kernel_image_start(void); |
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| 55 | extern void *trap_table; |
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| 56 | |||
| 3771 | rimsky | 57 | /** Determine number of processors. */ |
| 58 | void smp_init(void) |
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| 59 | { |
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| 4614 | rimsky | 60 | md_node_t node = md_get_root(); |
| 61 | count_t cpu_count = 0; |
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| 62 | |||
| 63 | /* walk through MD, find the current CPU node & its clock-frequency */ |
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| 64 | while(md_next_node(&node, "cpu")) { |
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| 65 | cpu_count++; |
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| 66 | } |
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| 67 | |||
| 68 | config.cpu_count = cpu_count; |
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| 3771 | rimsky | 69 | } |
| 70 | |||
| 71 | |||
| 72 | /** Wake application processors up. */ |
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| 73 | void kmp(void *arg) |
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| 74 | { |
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| 4614 | rimsky | 75 | (void) arg; |
| 76 | |||
| 77 | uint64_t myid; |
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| 78 | __hypercall_fast_ret1(0, 0, 0, 0, 0, CPU_MYID, &myid); |
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| 79 | |||
| 80 | /* stop the CPUs before making them execute our code */ |
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| 81 | uint64_t i; |
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| 82 | for (i = 0; i < config.cpu_count; i++) { |
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| 83 | if (i == myid) |
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| 84 | continue; |
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| 85 | |||
| 86 | if (__hypercall_fast1(CPU_STOP, i) != 0) |
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| 87 | continue; |
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| 88 | |||
| 89 | uint64_t state; |
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| 90 | __hypercall_fast_ret1(i, 0, 0, 0, 0, CPU_STATE, &state); |
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| 91 | while (state == CPU_STATE_RUNNING) { |
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| 92 | __hypercall_fast_ret1(i, 0, 0, 0, 0, CPU_STATE, &state); |
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| 93 | } |
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| 94 | } |
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| 95 | |||
| 96 | /* wake the processors up, one by one */ |
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| 97 | uint64_t state; |
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| 98 | for (i = 1; i < config.cpu_count; i++) { |
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| 99 | __hypercall_fast_ret1(i, 0, 0, 0, 0, CPU_STATE, &state); |
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| 100 | printf("Starting CPU %d, error code = %d.\n", i, __hypercall_fast4( |
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| 101 | CPU_START, |
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| 102 | i, |
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| 103 | (uint64_t) KA2PA(kernel_image_start), |
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| 104 | KA2PA(trap_table), |
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| 105 | bootinfo.physmem_start |
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| 106 | )); |
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| 107 | |||
| 108 | if (waitq_sleep_timeout(&ap_completion_wq, 10000000, SYNCH_FLAGS_NONE) == |
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| 109 | ESYNCH_TIMEOUT) |
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| 110 | printf("%s: waiting for processor (cpuid = %" PRIu32 |
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| 111 | ") timed out\n", __func__, i); |
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| 112 | |||
| 113 | } |
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| 114 | |||
| 3771 | rimsky | 115 | } |
| 116 | |||
| 117 | /** @} |
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| 118 | */ |