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1903 | jermar | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2006 Jakub Jermar |
1903 | jermar | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup sparc64 |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
35 | #include <smp/smp.h> |
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36 | #include <genarch/ofw/ofw_tree.h> |
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37 | #include <cpu.h> |
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3675 | svoboda | 38 | #include <arch/cpu_family.h> |
1903 | jermar | 39 | #include <arch/cpu.h> |
40 | #include <arch.h> |
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41 | #include <config.h> |
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42 | #include <macros.h> |
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43 | #include <arch/types.h> |
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44 | #include <synch/synch.h> |
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45 | #include <synch/waitq.h> |
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46 | #include <print.h> |
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3675 | svoboda | 47 | #include <arch/cpu_node.h> |
1903 | jermar | 48 | |
49 | /** |
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50 | * This global variable is used to pick-up application processors |
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51 | * from their active loop in start.S. When a processor looping in |
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52 | * start.S sees that this variable contains its MID, it can |
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53 | * proceed with its initialization. |
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54 | * |
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55 | * This variable is modified only by the bootstrap processor. |
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56 | * Other processors access it read-only. |
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57 | */ |
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58 | volatile uint64_t waking_up_mid = (uint64_t) -1; |
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59 | |||
60 | /** Determine number of processors. */ |
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61 | void smp_init(void) |
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62 | { |
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63 | ofw_tree_node_t *node; |
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4692 | svoboda | 64 | size_t cnt = 0; |
1903 | jermar | 65 | |
3675 | svoboda | 66 | if (is_us() || is_us_iii()) { |
67 | node = ofw_tree_find_child_by_device_type(cpus_parent(), "cpu"); |
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68 | while (node) { |
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69 | cnt++; |
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70 | node = ofw_tree_find_peer_by_device_type(node, "cpu"); |
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71 | } |
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72 | } else if (is_us_iv()) { |
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73 | node = ofw_tree_find_child(cpus_parent(), "cmp"); |
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74 | while (node) { |
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75 | cnt += 2; |
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76 | node = ofw_tree_find_peer_by_name(node, "cmp"); |
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77 | } |
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1903 | jermar | 78 | } |
79 | |||
80 | config.cpu_count = max(1, cnt); |
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81 | } |
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82 | |||
3675 | svoboda | 83 | /** |
84 | * Wakes up the CPU which is represented by the "node" OFW tree node. |
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85 | * If "node" represents the current CPU, calling the function has |
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86 | * no effect. |
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87 | */ |
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88 | static void wakeup_cpu(ofw_tree_node_t *node) |
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89 | { |
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90 | uint32_t mid; |
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91 | ofw_tree_property_t *prop; |
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92 | |||
93 | /* 'upa-portid' for US, 'portid' for US-III, 'cpuid' for US-IV */ |
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94 | prop = ofw_tree_getprop(node, "upa-portid"); |
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95 | if ((!prop) || (!prop->value)) |
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96 | prop = ofw_tree_getprop(node, "portid"); |
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97 | if ((!prop) || (!prop->value)) |
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98 | prop = ofw_tree_getprop(node, "cpuid"); |
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99 | |||
100 | if (!prop || prop->value == NULL) |
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101 | return; |
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102 | |||
103 | mid = *((uint32_t *) prop->value); |
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104 | if (CPU->arch.mid == mid) |
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105 | return; |
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106 | |||
107 | waking_up_mid = mid; |
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108 | |||
109 | if (waitq_sleep_timeout(&ap_completion_wq, 1000000, SYNCH_FLAGS_NONE) == |
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110 | ESYNCH_TIMEOUT) |
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111 | printf("%s: waiting for processor (mid = %" PRIu32 |
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112 | ") timed out\n", __func__, mid); |
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113 | } |
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114 | |||
1903 | jermar | 115 | /** Wake application processors up. */ |
116 | void kmp(void *arg) |
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117 | { |
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118 | ofw_tree_node_t *node; |
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119 | int i; |
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120 | |||
3675 | svoboda | 121 | if (is_us() || is_us_iii()) { |
122 | node = ofw_tree_find_child_by_device_type(cpus_parent(), "cpu"); |
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123 | for (i = 0; node; |
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124 | node = ofw_tree_find_peer_by_device_type(node, "cpu"), i++) |
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125 | wakeup_cpu(node); |
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126 | } else if (is_us_iv()) { |
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127 | node = ofw_tree_find_child(cpus_parent(), "cmp"); |
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128 | while (node) { |
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129 | wakeup_cpu(ofw_tree_find_child(node, "cpu@0")); |
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130 | wakeup_cpu(ofw_tree_find_child(node, "cpu@1")); |
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131 | node = ofw_tree_find_peer_by_name(node, "cmp"); |
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1903 | jermar | 132 | } |
133 | } |
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134 | } |
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135 | |||
136 | /** @} |
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137 | */ |