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- | 1 | /* |
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- | 2 | * Copyright (C) 2001-2005 Jakub Jermar |
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- | 3 | * All rights reserved. |
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- | 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 | #ifdef CONFIG_SMP |
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- | 30 | ||
- | 31 | #include <config.h> |
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- | 32 | #include <print.h> |
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- | 33 | #include <debug.h> |
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- | 34 | #include <arch/smp/mps.h> |
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- | 35 | #include <arch/smp/apic.h> |
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- | 36 | #include <arch/smp/smp.h> |
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- | 37 | #include <func.h> |
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- | 38 | #include <arch/types.h> |
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- | 39 | #include <typedefs.h> |
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- | 40 | #include <cpu.h> |
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- | 41 | #include <arch/asm.h> |
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- | 42 | #include <arch/bios/bios.h> |
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- | 43 | #include <mm/frame.h> |
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- | 44 | ||
- | 45 | /* |
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- | 46 | * MultiProcessor Specification detection code. |
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- | 47 | */ |
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- | 48 | ||
- | 49 | #define FS_SIGNATURE 0x5f504d5f |
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- | 50 | #define CT_SIGNATURE 0x504d4350 |
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- | 51 | ||
- | 52 | int mps_fs_check(__u8 *base); |
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- | 53 | int mps_ct_check(void); |
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- | 54 | ||
- | 55 | int configure_via_ct(void); |
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- | 56 | int configure_via_default(__u8 n); |
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- | 57 | ||
- | 58 | int ct_processor_entry(struct __processor_entry *pr); |
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- | 59 | void ct_bus_entry(struct __bus_entry *bus); |
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- | 60 | void ct_io_apic_entry(struct __io_apic_entry *ioa); |
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- | 61 | void ct_io_intr_entry(struct __io_intr_entry *iointr); |
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- | 62 | void ct_l_intr_entry(struct __l_intr_entry *lintr); |
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- | 63 | ||
- | 64 | void ct_extended_entries(void); |
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- | 65 | ||
- | 66 | static struct mps_fs *fs; |
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- | 67 | static struct mps_ct *ct; |
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- | 68 | ||
- | 69 | struct __processor_entry *processor_entries = NULL; |
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- | 70 | struct __bus_entry *bus_entries = NULL; |
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- | 71 | struct __io_apic_entry *io_apic_entries = NULL; |
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- | 72 | struct __io_intr_entry *io_intr_entries = NULL; |
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- | 73 | struct __l_intr_entry *l_intr_entries = NULL; |
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- | 74 | ||
- | 75 | int processor_entry_cnt = 0; |
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- | 76 | int bus_entry_cnt = 0; |
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- | 77 | int io_apic_entry_cnt = 0; |
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- | 78 | int io_intr_entry_cnt = 0; |
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- | 79 | int l_intr_entry_cnt = 0; |
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- | 80 | ||
- | 81 | waitq_t ap_completion_wq; |
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- | 82 | waitq_t kmp_completion_wq; |
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- | 83 | ||
- | 84 | ||
- | 85 | /* |
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- | 86 | * Implementation of IA-32 SMP configuration interface. |
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- | 87 | */ |
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- | 88 | static count_t get_cpu_count(void); |
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- | 89 | static bool is_cpu_enabled(index_t i); |
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- | 90 | static bool is_bsp(index_t i); |
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- | 91 | static __u8 get_cpu_apic_id(index_t i); |
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- | 92 | static int mps_irq_to_pin(int irq); |
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- | 93 | ||
- | 94 | struct smp_config_operations mps_config_operations = { |
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- | 95 | .cpu_count = get_cpu_count, |
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- | 96 | .cpu_enabled = is_cpu_enabled, |
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- | 97 | .cpu_bootstrap = is_bsp, |
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- | 98 | .cpu_apic_id = get_cpu_apic_id, |
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- | 99 | .irq_to_pin = mps_irq_to_pin |
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- | 100 | }; |
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- | 101 | ||
- | 102 | count_t get_cpu_count(void) |
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- | 103 | { |
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- | 104 | return processor_entry_cnt; |
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- | 105 | } |
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- | 106 | ||
- | 107 | bool is_cpu_enabled(index_t i) |
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- | 108 | { |
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- | 109 | ASSERT(i < processor_entry_cnt); |
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- | 110 | return processor_entries[i].cpu_flags & 0x1; |
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- | 111 | } |
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- | 112 | ||
- | 113 | bool is_bsp(index_t i) |
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- | 114 | { |
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- | 115 | ASSERT(i < processor_entry_cnt); |
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- | 116 | return processor_entries[i].cpu_flags & 0x2; |
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- | 117 | } |
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- | 118 | ||
- | 119 | __u8 get_cpu_apic_id(index_t i) |
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- | 120 | { |
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- | 121 | ASSERT(i < processor_entry_cnt); |
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- | 122 | return processor_entries[i].l_apic_id; |
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- | 123 | } |
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- | 124 | ||
- | 125 | ||
- | 126 | /* |
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- | 127 | * Used to check the integrity of the MP Floating Structure. |
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- | 128 | */ |
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- | 129 | int mps_fs_check(__u8 *base) |
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- | 130 | { |
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- | 131 | int i; |
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- | 132 | __u8 sum; |
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- | 133 | ||
- | 134 | for (i = 0, sum = 0; i < 16; i++) |
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- | 135 | sum += base[i]; |
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- | 136 | ||
- | 137 | return !sum; |
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- | 138 | } |
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- | 139 | ||
- | 140 | /* |
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- | 141 | * Used to check the integrity of the MP Configuration Table. |
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- | 142 | */ |
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- | 143 | int mps_ct_check(void) |
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- | 144 | { |
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- | 145 | __u8 *base = (__u8 *) ct; |
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- | 146 | __u8 *ext = base + ct->base_table_length; |
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- | 147 | __u8 sum; |
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- | 148 | int i; |
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- | 149 | ||
- | 150 | /* count the checksum for the base table */ |
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- | 151 | for (i=0,sum=0; i < ct->base_table_length; i++) |
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- | 152 | sum += base[i]; |
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- | 153 | ||
- | 154 | if (sum) |
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- | 155 | return 0; |
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- | 156 | ||
- | 157 | /* count the checksum for the extended table */ |
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- | 158 | for (i=0,sum=0; i < ct->ext_table_length; i++) |
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- | 159 | sum += ext[i]; |
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- | 160 | ||
- | 161 | return sum == ct->ext_table_checksum; |
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- | 162 | } |
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- | 163 | ||
- | 164 | void mps_init(void) |
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- | 165 | { |
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- | 166 | __u8 *addr[2] = { NULL, (__u8 *) PA2KA(0xf0000) }; |
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- | 167 | int i, j, length[2] = { 1024, 64*1024 }; |
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- | 168 | ||
- | 169 | ||
- | 170 | /* |
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- | 171 | * Find MP Floating Pointer Structure |
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- | 172 | * 1a. search first 1K of EBDA |
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- | 173 | * 1b. if EBDA is undefined, search last 1K of base memory |
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- | 174 | * 2. search 64K starting at 0xf0000 |
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- | 175 | */ |
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- | 176 | ||
- | 177 | addr[0] = (__u8 *) PA2KA(ebda ? ebda : 639 * 1024); |
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- | 178 | for (i = 0; i < 2; i++) { |
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- | 179 | for (j = 0; j < length[i]; j += 16) { |
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- | 180 | if (*((__u32 *) &addr[i][j]) == FS_SIGNATURE && mps_fs_check(&addr[i][j])) { |
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- | 181 | fs = (struct mps_fs *) &addr[i][j]; |
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- | 182 | goto fs_found; |
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- | 183 | } |
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- | 184 | } |
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- | 185 | } |
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- | 186 | ||
- | 187 | return; |
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- | 188 | ||
- | 189 | fs_found: |
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- | 190 | printf("%P: MPS Floating Pointer Structure\n", fs); |
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- | 191 | ||
- | 192 | if (fs->config_type == 0 && fs->configuration_table) { |
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- | 193 | if (fs->mpfib2 >> 7) { |
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- | 194 | printf("%s: PIC mode not supported\n", __FUNCTION__); |
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- | 195 | return; |
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- | 196 | } |
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- | 197 | ||
- | 198 | ct = (struct mps_ct *)PA2KA((__address)fs->configuration_table); |
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- | 199 | config.cpu_count = configure_via_ct(); |
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- | 200 | } |
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- | 201 | else |
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- | 202 | config.cpu_count = configure_via_default(fs->config_type); |
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- | 203 | ||
- | 204 | return; |
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- | 205 | } |
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- | 206 | ||
- | 207 | int configure_via_ct(void) |
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- | 208 | { |
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- | 209 | __u8 *cur; |
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- | 210 | int i, cnt; |
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- | 211 | ||
- | 212 | if (ct->signature != CT_SIGNATURE) { |
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- | 213 | printf("%s: bad ct->signature\n", __FUNCTION__); |
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- | 214 | return 1; |
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- | 215 | } |
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- | 216 | if (!mps_ct_check()) { |
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- | 217 | printf("%s: bad ct checksum\n", __FUNCTION__); |
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- | 218 | return 1; |
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- | 219 | } |
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- | 220 | if (ct->oem_table) { |
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- | 221 | printf("%s: ct->oem_table not supported\n", __FUNCTION__); |
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- | 222 | return 1; |
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- | 223 | } |
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- | 224 | ||
- | 225 | l_apic = (__u32 *)(__address)ct->l_apic; |
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- | 226 | ||
- | 227 | cnt = 0; |
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- | 228 | cur = &ct->base_table[0]; |
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- | 229 | for (i=0; i < ct->entry_count; i++) { |
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- | 230 | switch (*cur) { |
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- | 231 | /* Processor entry */ |
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- | 232 | case 0: |
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- | 233 | processor_entries = processor_entries ? processor_entries : (struct __processor_entry *) cur; |
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- | 234 | processor_entry_cnt++; |
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- | 235 | cnt += ct_processor_entry((struct __processor_entry *) cur); |
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- | 236 | cur += 20; |
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- | 237 | break; |
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- | 238 | ||
- | 239 | /* Bus entry */ |
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- | 240 | case 1: |
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- | 241 | bus_entries = bus_entries ? bus_entries : (struct __bus_entry *) cur; |
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- | 242 | bus_entry_cnt++; |
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- | 243 | ct_bus_entry((struct __bus_entry *) cur); |
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- | 244 | cur += 8; |
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- | 245 | break; |
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- | 246 | ||
- | 247 | /* I/O Apic */ |
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- | 248 | case 2: |
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- | 249 | io_apic_entries = io_apic_entries ? io_apic_entries : (struct __io_apic_entry *) cur; |
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- | 250 | io_apic_entry_cnt++; |
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- | 251 | ct_io_apic_entry((struct __io_apic_entry *) cur); |
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- | 252 | cur += 8; |
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- | 253 | break; |
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- | 254 | ||
- | 255 | /* I/O Interrupt Assignment */ |
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- | 256 | case 3: |
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- | 257 | io_intr_entries = io_intr_entries ? io_intr_entries : (struct __io_intr_entry *) cur; |
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- | 258 | io_intr_entry_cnt++; |
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- | 259 | ct_io_intr_entry((struct __io_intr_entry *) cur); |
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- | 260 | cur += 8; |
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- | 261 | break; |
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- | 262 | ||
- | 263 | /* Local Interrupt Assignment */ |
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- | 264 | case 4: |
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- | 265 | l_intr_entries = l_intr_entries ? l_intr_entries : (struct __l_intr_entry *) cur; |
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- | 266 | l_intr_entry_cnt++; |
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- | 267 | ct_l_intr_entry((struct __l_intr_entry *) cur); |
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- | 268 | cur += 8; |
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- | 269 | break; |
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- | 270 | ||
- | 271 | default: |
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- | 272 | /* |
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- | 273 | * Something is wrong. Fallback to UP mode. |
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- | 274 | */ |
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- | 275 | ||
- | 276 | printf("%s: ct badness\n", __FUNCTION__); |
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- | 277 | return 1; |
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- | 278 | } |
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- | 279 | } |
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- | 280 | ||
- | 281 | /* |
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- | 282 | * Process extended entries. |
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- | 283 | */ |
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- | 284 | ct_extended_entries(); |
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- | 285 | return cnt; |
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- | 286 | } |
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- | 287 | ||
- | 288 | int configure_via_default(__u8 n) |
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- | 289 | { |
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- | 290 | /* |
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- | 291 | * Not yet implemented. |
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- | 292 | */ |
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- | 293 | printf("%s: not supported\n", __FUNCTION__); |
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- | 294 | return 1; |
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- | 295 | } |
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- | 296 | ||
- | 297 | ||
- | 298 | int ct_processor_entry(struct __processor_entry *pr) |
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- | 299 | { |
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- | 300 | /* |
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- | 301 | * Ignore processors which are not marked enabled. |
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- | 302 | */ |
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- | 303 | if ((pr->cpu_flags & (1<<0)) == 0) |
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- | 304 | return 0; |
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- | 305 | ||
- | 306 | apic_id_mask |= (1<<pr->l_apic_id); |
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- | 307 | return 1; |
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- | 308 | } |
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- | 309 | ||
- | 310 | void ct_bus_entry(struct __bus_entry *bus) |
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- | 311 | { |
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- | 312 | #ifdef MPSCT_VERBOSE |
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- | 313 | char buf[7]; |
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- | 314 | memcpy((void *) buf, (void *) bus->bus_type, 6); |
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- | 315 | buf[6] = 0; |
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- | 316 | printf("bus%d: %s\n", bus->bus_id, buf); |
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- | 317 | #endif |
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- | 318 | } |
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- | 319 | ||
- | 320 | void ct_io_apic_entry(struct __io_apic_entry *ioa) |
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- | 321 | { |
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- | 322 | static int io_apic_count = 0; |
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- | 323 | ||
- | 324 | /* this ioapic is marked unusable */ |
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- | 325 | if (ioa->io_apic_flags & 1 == 0) |
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- | 326 | return; |
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- | 327 | ||
- | 328 | if (io_apic_count++ > 0) { |
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- | 329 | /* |
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- | 330 | * Multiple IO APIC's are currently not supported. |
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- | 331 | */ |
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- | 332 | return; |
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- | 333 | } |
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- | 334 | ||
- | 335 | io_apic = (__u32 *)(__address)ioa->io_apic; |
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- | 336 | } |
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- | 337 | ||
- | 338 | //#define MPSCT_VERBOSE |
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- | 339 | void ct_io_intr_entry(struct __io_intr_entry *iointr) |
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- | 340 | { |
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- | 341 | #ifdef MPSCT_VERBOSE |
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- | 342 | switch (iointr->intr_type) { |
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- | 343 | case 0: printf("INT"); break; |
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- | 344 | case 1: printf("NMI"); break; |
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- | 345 | case 2: printf("SMI"); break; |
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- | 346 | case 3: printf("ExtINT"); break; |
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- | 347 | } |
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- | 348 | putchar(','); |
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- | 349 | switch (iointr->poel&3) { |
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- | 350 | case 0: printf("bus-like"); break; |
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- | 351 | case 1: printf("active high"); break; |
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- | 352 | case 2: printf("reserved"); break; |
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- | 353 | case 3: printf("active low"); break; |
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- | 354 | } |
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- | 355 | putchar(','); |
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- | 356 | switch ((iointr->poel>>2)&3) { |
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- | 357 | case 0: printf("bus-like"); break; |
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- | 358 | case 1: printf("edge-triggered"); break; |
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- | 359 | case 2: printf("reserved"); break; |
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- | 360 | case 3: printf("level-triggered"); break; |
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- | 361 | } |
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- | 362 | putchar(','); |
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- | 363 | printf("bus%d,irq%d", iointr->src_bus_id, iointr->src_bus_irq); |
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- | 364 | putchar(','); |
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- | 365 | printf("io_apic%d,pin%d", iointr->dst_io_apic_id, iointr->dst_io_apic_pin); |
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- | 366 | putchar('\n'); |
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- | 367 | #endif |
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- | 368 | } |
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- | 369 | ||
- | 370 | void ct_l_intr_entry(struct __l_intr_entry *lintr) |
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- | 371 | { |
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- | 372 | #ifdef MPSCT_VERBOSE |
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- | 373 | switch (lintr->intr_type) { |
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- | 374 | case 0: printf("INT"); break; |
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- | 375 | case 1: printf("NMI"); break; |
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- | 376 | case 2: printf("SMI"); break; |
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- | 377 | case 3: printf("ExtINT"); break; |
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- | 378 | } |
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- | 379 | putchar(','); |
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- | 380 | switch (lintr->poel&3) { |
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- | 381 | case 0: printf("bus-like"); break; |
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- | 382 | case 1: printf("active high"); break; |
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- | 383 | case 2: printf("reserved"); break; |
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- | 384 | case 3: printf("active low"); break; |
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- | 385 | } |
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- | 386 | putchar(','); |
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- | 387 | switch ((lintr->poel>>2)&3) { |
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- | 388 | case 0: printf("bus-like"); break; |
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- | 389 | case 1: printf("edge-triggered"); break; |
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- | 390 | case 2: printf("reserved"); break; |
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- | 391 | case 3: printf("level-triggered"); break; |
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- | 392 | } |
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- | 393 | putchar(','); |
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- | 394 | printf("bus%d,irq%d", lintr->src_bus_id, lintr->src_bus_irq); |
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- | 395 | putchar(','); |
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- | 396 | printf("l_apic%d,pin%d", lintr->dst_l_apic_id, lintr->dst_l_apic_pin); |
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- | 397 | putchar('\n'); |
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- | 398 | #endif |
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- | 399 | } |
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- | 400 | ||
- | 401 | void ct_extended_entries(void) |
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- | 402 | { |
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- | 403 | __u8 *ext = (__u8 *) ct + ct->base_table_length; |
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- | 404 | __u8 *cur; |
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- | 405 | ||
- | 406 | for (cur = ext; cur < ext + ct->ext_table_length; cur += cur[CT_EXT_ENTRY_LEN]) { |
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- | 407 | switch (cur[CT_EXT_ENTRY_TYPE]) { |
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- | 408 | default: |
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- | 409 | printf("%P: skipping MP Configuration Table extended entry type %d\n", cur, cur[CT_EXT_ENTRY_TYPE]); |
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- | 410 | break; |
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- | 411 | } |
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- | 412 | } |
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- | 413 | } |
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- | 414 | ||
- | 415 | int mps_irq_to_pin(int irq) |
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- | 416 | { |
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- | 417 | int i; |
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- | 418 | ||
- | 419 | for(i=0;i<io_intr_entry_cnt;i++) { |
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- | 420 | if (io_intr_entries[i].src_bus_irq == irq && io_intr_entries[i].intr_type == 0) |
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- | 421 | return io_intr_entries[i].dst_io_apic_pin; |
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- | 422 | } |
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- | 423 | ||
- | 424 | return -1; |
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- | 425 | } |
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- | 426 | ||
- | 427 | #endif /* CONFIG_SMP */ |