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1 jermar 1
/*
34 jermar 2
 * Copyright (C) 2001-2005 Jakub Jermar
1 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
 
1702 cejka 29
 /** @addtogroup ia32  
30
 * @{
31
 */
32
/** @file
33
 */
34
 
458 decky 35
#ifdef CONFIG_SMP
1 jermar 36
 
37
#include <config.h>
38
#include <print.h>
128 jermar 39
#include <debug.h>
34 jermar 40
#include <arch/smp/mps.h>
11 jermar 41
#include <arch/smp/apic.h>
128 jermar 42
#include <arch/smp/smp.h>
1 jermar 43
#include <func.h>
44
#include <arch/types.h>
45
#include <typedefs.h>
46
#include <cpu.h>
47
#include <arch/asm.h>
30 jermar 48
#include <arch/bios/bios.h>
195 vana 49
#include <mm/frame.h>
1 jermar 50
 
51
/*
34 jermar 52
 * MultiProcessor Specification detection code.
1 jermar 53
 */
54
 
55
#define FS_SIGNATURE    0x5f504d5f
56
#define CT_SIGNATURE    0x504d4350
57
 
1780 jermar 58
int mps_fs_check(uint8_t *base);
34 jermar 59
int mps_ct_check(void);
1 jermar 60
 
61
int configure_via_ct(void);
1780 jermar 62
int configure_via_default(uint8_t n);
1 jermar 63
 
64
int ct_processor_entry(struct __processor_entry *pr);
65
void ct_bus_entry(struct __bus_entry *bus);
66
void ct_io_apic_entry(struct __io_apic_entry *ioa);
67
void ct_io_intr_entry(struct __io_intr_entry *iointr);
68
void ct_l_intr_entry(struct __l_intr_entry *lintr);
69
 
70
void ct_extended_entries(void);
71
 
34 jermar 72
static struct mps_fs *fs;
73
static struct mps_ct *ct;
1 jermar 74
 
75
struct __processor_entry *processor_entries = NULL;
76
struct __bus_entry *bus_entries = NULL;
77
struct __io_apic_entry *io_apic_entries = NULL;
78
struct __io_intr_entry *io_intr_entries = NULL;
79
struct __l_intr_entry *l_intr_entries = NULL;
80
 
81
int processor_entry_cnt = 0;
82
int bus_entry_cnt = 0;
83
int io_apic_entry_cnt = 0;
84
int io_intr_entry_cnt = 0;
85
int l_intr_entry_cnt = 0;
86
 
87
waitq_t ap_completion_wq;
88
 
89
/*
128 jermar 90
 * Implementation of IA-32 SMP configuration interface.
91
 */
92
static count_t get_cpu_count(void);
93
static bool is_cpu_enabled(index_t i);
94
static bool is_bsp(index_t i);
1780 jermar 95
static uint8_t get_cpu_apic_id(index_t i);
512 jermar 96
static int mps_irq_to_pin(int irq);
128 jermar 97
 
98
struct smp_config_operations mps_config_operations = {
99
    .cpu_count = get_cpu_count,
100
    .cpu_enabled = is_cpu_enabled,
101
    .cpu_bootstrap = is_bsp,
512 jermar 102
    .cpu_apic_id = get_cpu_apic_id,
103
    .irq_to_pin = mps_irq_to_pin
128 jermar 104
};
105
 
106
count_t get_cpu_count(void)
107
{
108
    return processor_entry_cnt;
109
}
110
 
111
bool is_cpu_enabled(index_t i)
112
{
113
    ASSERT(i < processor_entry_cnt);
114
    return processor_entries[i].cpu_flags & 0x1;
115
}
116
 
117
bool is_bsp(index_t i)
118
{
119
    ASSERT(i < processor_entry_cnt);
120
    return processor_entries[i].cpu_flags & 0x2;
121
}
122
 
1780 jermar 123
uint8_t get_cpu_apic_id(index_t i)
128 jermar 124
{
125
    ASSERT(i < processor_entry_cnt);
126
    return processor_entries[i].l_apic_id;
127
}
128
 
129
 
130
/*
1 jermar 131
 * Used to check the integrity of the MP Floating Structure.
132
 */
1780 jermar 133
int mps_fs_check(uint8_t *base)
1 jermar 134
{
135
    int i;
1780 jermar 136
    uint8_t sum;
1 jermar 137
 
138
    for (i = 0, sum = 0; i < 16; i++)
139
        sum += base[i];
140
 
141
    return !sum;
142
}
143
 
144
/*
145
 * Used to check the integrity of the MP Configuration Table.
146
 */
34 jermar 147
int mps_ct_check(void)
1 jermar 148
{
1780 jermar 149
    uint8_t *base = (uint8_t *) ct;
150
    uint8_t *ext = base + ct->base_table_length;
151
    uint8_t sum;
1 jermar 152
    int i; 
153
 
154
    /* count the checksum for the base table */
155
    for (i=0,sum=0; i < ct->base_table_length; i++)
156
        sum += base[i];
157
 
158
    if (sum)
159
        return 0;
160
 
161
    /* count the checksum for the extended table */
162
    for (i=0,sum=0; i < ct->ext_table_length; i++)
163
        sum += ext[i];
164
 
12 jermar 165
    return sum == ct->ext_table_checksum;
1 jermar 166
}
167
 
34 jermar 168
void mps_init(void)
1 jermar 169
{
1780 jermar 170
    uint8_t *addr[2] = { NULL, (uint8_t *) PA2KA(0xf0000) };
32 jermar 171
    int i, j, length[2] = { 1024, 64*1024 };
1 jermar 172
 
173
 
174
    /*
32 jermar 175
     * Find MP Floating Pointer Structure
176
     * 1a. search first 1K of EBDA
177
     * 1b. if EBDA is undefined, search last 1K of base memory
178
     *  2. search 64K starting at 0xf0000
1 jermar 179
     */
32 jermar 180
 
1780 jermar 181
    addr[0] = (uint8_t *) PA2KA(ebda ? ebda : 639 * 1024);
32 jermar 182
    for (i = 0; i < 2; i++) {
183
        for (j = 0; j < length[i]; j += 16) {
1780 jermar 184
            if (*((uint32_t *) &addr[i][j]) == FS_SIGNATURE && mps_fs_check(&addr[i][j])) {
34 jermar 185
                fs = (struct mps_fs *) &addr[i][j];
1 jermar 186
                goto fs_found;
32 jermar 187
            }
1 jermar 188
        }
189
    }
190
 
191
    return;
192
 
193
fs_found:
1221 decky 194
    printf("%p: MPS Floating Pointer Structure\n", fs);
1 jermar 195
 
196
    if (fs->config_type == 0 && fs->configuration_table) {
197
        if (fs->mpfib2 >> 7) {
110 jermar 198
            printf("%s: PIC mode not supported\n", __FUNCTION__);
1 jermar 199
            return;
200
        }
201
 
1780 jermar 202
        ct = (struct mps_ct *)PA2KA((uintptr_t)fs->configuration_table);
1 jermar 203
        config.cpu_count = configure_via_ct();
204
    }
205
    else
206
        config.cpu_count = configure_via_default(fs->config_type);
207
 
208
    return;
209
}
210
 
211
int configure_via_ct(void)
212
{
1780 jermar 213
    uint8_t *cur;
1 jermar 214
    int i, cnt;
215
 
216
    if (ct->signature != CT_SIGNATURE) {
110 jermar 217
        printf("%s: bad ct->signature\n", __FUNCTION__);
1 jermar 218
        return 1;
219
    }
34 jermar 220
    if (!mps_ct_check()) {
110 jermar 221
        printf("%s: bad ct checksum\n", __FUNCTION__);
1 jermar 222
        return 1;
223
    }
224
    if (ct->oem_table) {
110 jermar 225
        printf("%s: ct->oem_table not supported\n", __FUNCTION__);
1 jermar 226
        return 1;
227
    }
228
 
1780 jermar 229
    l_apic = (uint32_t *)(uintptr_t)ct->l_apic;
1 jermar 230
 
231
    cnt = 0;
232
    cur = &ct->base_table[0];
233
    for (i=0; i < ct->entry_count; i++) {
234
        switch (*cur) {
235
            /* Processor entry */
236
            case 0:
237
                processor_entries = processor_entries ? processor_entries : (struct __processor_entry *) cur;
238
                processor_entry_cnt++;
239
                cnt += ct_processor_entry((struct __processor_entry *) cur);
240
                cur += 20;
241
                break;
242
 
243
            /* Bus entry */
244
            case 1:
245
                bus_entries = bus_entries ? bus_entries : (struct __bus_entry *) cur;
246
                bus_entry_cnt++;
247
                ct_bus_entry((struct __bus_entry *) cur);
248
                cur += 8;
249
                break;
250
 
251
            /* I/O Apic */
252
            case 2:
253
                io_apic_entries = io_apic_entries ? io_apic_entries : (struct __io_apic_entry *) cur;
254
                io_apic_entry_cnt++;
255
                ct_io_apic_entry((struct __io_apic_entry *) cur);
256
                cur += 8;
257
                break;
258
 
259
            /* I/O Interrupt Assignment */
260
            case 3:
261
                io_intr_entries = io_intr_entries ? io_intr_entries : (struct __io_intr_entry *) cur;
262
                io_intr_entry_cnt++;
263
                ct_io_intr_entry((struct __io_intr_entry *) cur);
264
                cur += 8;
265
                break;
266
 
267
            /* Local Interrupt Assignment */
268
            case 4:
269
                l_intr_entries = l_intr_entries ? l_intr_entries : (struct __l_intr_entry *) cur;
270
                l_intr_entry_cnt++;
271
                ct_l_intr_entry((struct __l_intr_entry *) cur);
125 jermar 272
                cur += 8;
1 jermar 273
                break;
125 jermar 274
 
1 jermar 275
            default:
276
                /*
277
                 * Something is wrong. Fallback to UP mode.
278
                 */
279
 
110 jermar 280
                printf("%s: ct badness\n", __FUNCTION__);
1 jermar 281
                return 1;
282
        }
283
    }
284
 
285
    /*
286
     * Process extended entries.
287
     */
288
    ct_extended_entries();
289
    return cnt;
290
}
291
 
1780 jermar 292
int configure_via_default(uint8_t n)
1 jermar 293
{
294
    /*
295
     * Not yet implemented.
296
     */
110 jermar 297
    printf("%s: not supported\n", __FUNCTION__);
1 jermar 298
    return 1;
299
}
300
 
301
 
302
int ct_processor_entry(struct __processor_entry *pr)
303
{
304
    /*
305
     * Ignore processors which are not marked enabled.
306
     */
307
    if ((pr->cpu_flags & (1<<0)) == 0)
308
        return 0;
309
 
310
    apic_id_mask |= (1<<pr->l_apic_id);
311
    return 1;
312
}
313
 
314
void ct_bus_entry(struct __bus_entry *bus)
315
{
34 jermar 316
#ifdef MPSCT_VERBOSE
1 jermar 317
    char buf[7];
205 jermar 318
    memcpy((void *) buf, (void *) bus->bus_type, 6);
1 jermar 319
    buf[6] = 0;
320
    printf("bus%d: %s\n", bus->bus_id, buf);
321
#endif
322
}
323
 
324
void ct_io_apic_entry(struct __io_apic_entry *ioa)
325
{
326
    static int io_apic_count = 0;
327
 
328
    /* this ioapic is marked unusable */
615 palkovsky 329
    if ((ioa->io_apic_flags & 1) == 0)
1 jermar 330
        return;
331
 
332
    if (io_apic_count++ > 0) {
333
        /*
334
         * Multiple IO APIC's are currently not supported.
335
         */
336
        return;
337
    }
338
 
1780 jermar 339
    io_apic = (uint32_t *)(uintptr_t)ioa->io_apic;
1 jermar 340
}
341
 
34 jermar 342
//#define MPSCT_VERBOSE
1 jermar 343
void ct_io_intr_entry(struct __io_intr_entry *iointr)
344
{
34 jermar 345
#ifdef MPSCT_VERBOSE
1 jermar 346
    switch (iointr->intr_type) {
347
        case 0: printf("INT"); break;
348
        case 1: printf("NMI"); break;
349
        case 2: printf("SMI"); break;
350
        case 3: printf("ExtINT"); break;
351
    }
352
    putchar(',');
353
    switch (iointr->poel&3) {
354
        case 0: printf("bus-like"); break;
355
        case 1: printf("active high"); break;
356
        case 2: printf("reserved"); break;
357
        case 3: printf("active low"); break;
358
    }
359
    putchar(',');
360
    switch ((iointr->poel>>2)&3) {
361
        case 0: printf("bus-like"); break;
362
        case 1: printf("edge-triggered"); break;
363
        case 2: printf("reserved"); break;
364
        case 3: printf("level-triggered"); break;
365
    }
366
    putchar(',');
367
    printf("bus%d,irq%d", iointr->src_bus_id, iointr->src_bus_irq);
368
    putchar(',');
369
    printf("io_apic%d,pin%d", iointr->dst_io_apic_id, iointr->dst_io_apic_pin);
370
    putchar('\n'); 
371
#endif
372
}
373
 
374
void ct_l_intr_entry(struct __l_intr_entry *lintr)
375
{
34 jermar 376
#ifdef MPSCT_VERBOSE
1 jermar 377
    switch (lintr->intr_type) {
378
        case 0: printf("INT"); break;
379
        case 1: printf("NMI"); break;
380
        case 2: printf("SMI"); break;
381
        case 3: printf("ExtINT"); break;
382
    }
383
    putchar(',');
384
    switch (lintr->poel&3) {
385
        case 0: printf("bus-like"); break;
386
        case 1: printf("active high"); break;
387
        case 2: printf("reserved"); break;
388
        case 3: printf("active low"); break;
389
    }
390
    putchar(',');
391
    switch ((lintr->poel>>2)&3) {
392
        case 0: printf("bus-like"); break;
393
        case 1: printf("edge-triggered"); break;
394
        case 2: printf("reserved"); break;
395
        case 3: printf("level-triggered"); break;
396
    }
397
    putchar(',');
398
    printf("bus%d,irq%d", lintr->src_bus_id, lintr->src_bus_irq);
399
    putchar(',');
400
    printf("l_apic%d,pin%d", lintr->dst_l_apic_id, lintr->dst_l_apic_pin);
401
    putchar('\n');
402
#endif
403
}
404
 
405
void ct_extended_entries(void)
406
{
1780 jermar 407
    uint8_t *ext = (uint8_t *) ct + ct->base_table_length;
408
    uint8_t *cur;
13 jermar 409
 
410
    for (cur = ext; cur < ext + ct->ext_table_length; cur += cur[CT_EXT_ENTRY_LEN]) {
411
        switch (cur[CT_EXT_ENTRY_TYPE]) {
412
            default:
1221 decky 413
                printf("%p: skipping MP Configuration Table extended entry type %d\n", cur, cur[CT_EXT_ENTRY_TYPE]);
13 jermar 414
                break;
415
        }
416
    }
1 jermar 417
}
418
 
34 jermar 419
int mps_irq_to_pin(int irq)
1 jermar 420
{
421
    int i;
422
 
423
    for(i=0;i<io_intr_entry_cnt;i++) {
424
        if (io_intr_entries[i].src_bus_irq == irq && io_intr_entries[i].intr_type == 0)
425
            return io_intr_entries[i].dst_io_apic_pin;
426
    }
427
 
428
    return -1;
429
}
430
 
458 decky 431
#endif /* CONFIG_SMP */
1702 cejka 432
 
433
 /** @}
434
 */
435