summaryrefslogtreecommitdiffstats
path: root/qemu/roms/seabios/src/fw/biostables.c
blob: 9fb9ff9df25b7fe08347ff9b817f08533c5a0274 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
// Support for manipulating bios tables (pir, mptable, acpi, smbios).
//
// Copyright (C) 2008,2009  Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU LGPLv3 license.

#include "byteorder.h" // le32_to_cpu
#include "config.h" // CONFIG_*
#include "hw/pci.h" // pci_config_writeb
#include "malloc.h" // malloc_fseg
#include "memmap.h" // SYMBOL
#include "output.h" // dprintf
#include "romfile.h" // romfile_find
#include "std/acpi.h" // struct rsdp_descriptor
#include "std/mptable.h" // MPTABLE_SIGNATURE
#include "std/pirtable.h" // struct pir_header
#include "std/smbios.h" // struct smbios_entry_point
#include "string.h" // memcpy
#include "util.h" // copy_table
#include "x86.h" // outb

struct pir_header *PirAddr VARFSEG;

void
copy_pir(void *pos)
{
    struct pir_header *p = pos;
    if (p->signature != PIR_SIGNATURE)
        return;
    if (PirAddr)
        return;
    if (p->size < sizeof(*p))
        return;
    if (checksum(pos, p->size) != 0)
        return;
    void *newpos = malloc_fseg(p->size);
    if (!newpos) {
        warn_noalloc();
        return;
    }
    dprintf(1, "Copying PIR from %p to %p\n", pos, newpos);
    memcpy(newpos, pos, p->size);
    PirAddr = newpos;
}

void
copy_mptable(void *pos)
{
    struct mptable_floating_s *p = pos;
    if (p->signature != MPTABLE_SIGNATURE)
        return;
    if (!p->physaddr)
        return;
    if (checksum(pos, sizeof(*p)) != 0)
        return;
    u32 length = p->length * 16;
    u16 mpclength = ((struct mptable_config_s *)p->physaddr)->length;
    if (length + mpclength > BUILD_MAX_MPTABLE_FSEG) {
        dprintf(1, "Skipping MPTABLE copy due to large size (%d bytes)\n"
                , length + mpclength);
        return;
    }
    // Allocate final memory location.  (In theory the config
    // structure can go in high memory, but Linux kernels before
    // v2.6.30 crash with that.)
    struct mptable_floating_s *newpos = malloc_fseg(length + mpclength);
    if (!newpos) {
        warn_noalloc();
        return;
    }
    dprintf(1, "Copying MPTABLE from %p/%x to %p\n", pos, p->physaddr, newpos);
    memcpy(newpos, pos, length);
    newpos->physaddr = (u32)newpos + length;
    newpos->checksum -= checksum(newpos, sizeof(*newpos));
    memcpy((void*)newpos + length, (void*)p->physaddr, mpclength);
}


/****************************************************************
 * ACPI
 ****************************************************************/

static int
get_acpi_rsdp_length(void *pos, unsigned size)
{
    struct rsdp_descriptor *p = pos;
    if (p->signature != RSDP_SIGNATURE)
        return -1;
    u32 length = 20;
    if (length > size)
        return -1;
    if (checksum(pos, length) != 0)
        return -1;
    if (p->revision > 1) {
        length = p->length;
        if (length > size)
            return -1;
        if (checksum(pos, length) != 0)
            return -1;
    }
    return length;
}

struct rsdp_descriptor *RsdpAddr;

void
copy_acpi_rsdp(void *pos)
{
    if (RsdpAddr)
        return;
    int length = get_acpi_rsdp_length(pos, -1);
    if (length < 0)
        return;
    void *newpos = malloc_fseg(length);
    if (!newpos) {
        warn_noalloc();
        return;
    }
    dprintf(1, "Copying ACPI RSDP from %p to %p\n", pos, newpos);
    memcpy(newpos, pos, length);
    RsdpAddr = newpos;
}

void *find_acpi_rsdp(void)
{
    unsigned long start = SYMBOL(zonefseg_start);
    unsigned long end = SYMBOL(zonefseg_end);
    unsigned long pos;

    for (pos = ALIGN(start, 0x10); pos <= ALIGN_DOWN(end, 0x10); pos += 0x10)
        if (get_acpi_rsdp_length((void *)pos, end - pos) >= 0)
            return (void *)pos;

    return NULL;
}

static struct fadt_descriptor_rev1 *
find_fadt(void)
{
    dprintf(4, "rsdp=%p\n", RsdpAddr);
    if (!RsdpAddr || RsdpAddr->signature != RSDP_SIGNATURE)
        return NULL;
    struct rsdt_descriptor_rev1 *rsdt = (void*)RsdpAddr->rsdt_physical_address;
    dprintf(4, "rsdt=%p\n", rsdt);
    if (!rsdt || rsdt->signature != RSDT_SIGNATURE)
        return NULL;
    void *end = (void*)rsdt + rsdt->length;
    int i;
    for (i=0; (void*)&rsdt->table_offset_entry[i] < end; i++) {
        struct fadt_descriptor_rev1 *fadt = (void*)rsdt->table_offset_entry[i];
        if (!fadt || fadt->signature != FACP_SIGNATURE)
            continue;
        dprintf(4, "fadt=%p\n", fadt);
        return fadt;
    }
    dprintf(4, "no fadt found\n");
    return NULL;
}

u32
find_resume_vector(void)
{
    struct fadt_descriptor_rev1 *fadt = find_fadt();
    if (!fadt)
        return 0;
    struct facs_descriptor_rev1 *facs = (void*)fadt->firmware_ctrl;
    dprintf(4, "facs=%p\n", facs);
    if (! facs || facs->signature != FACS_SIGNATURE)
        return 0;
    // Found it.
    dprintf(4, "resume addr=%d\n", facs->firmware_waking_vector);
    return facs->firmware_waking_vector;
}

static struct acpi_20_generic_address acpi_reset_reg;
static u8 acpi_reset_val;
u32 acpi_pm1a_cnt VARFSEG;
u16 acpi_pm_base = 0xb000;

#define acpi_ga_to_bdf(addr) pci_to_bdf(0, (addr >> 32) & 0xffff, (addr >> 16) & 0xffff)

void
acpi_reboot(void)
{
    // Check it passed the sanity checks in acpi_set_reset_reg() and was set
    if (acpi_reset_reg.register_bit_width != 8)
        return;

    u64 addr = le64_to_cpu(acpi_reset_reg.address);

    dprintf(1, "ACPI hard reset %d:%llx (%x)\n",
            acpi_reset_reg.address_space_id, addr, acpi_reset_val);

    switch (acpi_reset_reg.address_space_id) {
    case 0: // System Memory
        writeb((void *)(u32)addr, acpi_reset_val);
        break;
    case 1: // System I/O
        outb(acpi_reset_val, addr);
        break;
    case 2: // PCI config space
        pci_config_writeb(acpi_ga_to_bdf(addr), addr & 0xffff, acpi_reset_val);
        break;
    }
}

static void
acpi_set_reset_reg(struct acpi_20_generic_address *reg, u8 val)
{
    if (!reg || reg->address_space_id > 2 ||
        reg->register_bit_width != 8 || reg->register_bit_offset)
        return;

    acpi_reset_reg = *reg;
    acpi_reset_val = val;
}

void
find_acpi_features(void)
{
    struct fadt_descriptor_rev1 *fadt = find_fadt();
    if (!fadt)
        return;
    u32 pm_tmr = le32_to_cpu(fadt->pm_tmr_blk);
    u32 pm1a_cnt = le32_to_cpu(fadt->pm1a_cnt_blk);
    dprintf(4, "pm_tmr_blk=%x\n", pm_tmr);
    if (pm_tmr)
        pmtimer_setup(pm_tmr);
    if (pm1a_cnt)
        acpi_pm1a_cnt = pm1a_cnt;

    // Theoretically we should check the 'reset_reg_sup' flag, but Windows
    // doesn't and thus nobody seems to *set* it. If the table is large enough
    // to include it, let the sanity checks in acpi_set_reset_reg() suffice.
    if (fadt->length >= 129) {
        void *p = fadt;
        acpi_set_reset_reg(p + 116, *(u8 *)(p + 128));
    }
}


/****************************************************************
 * SMBIOS
 ****************************************************************/

// Iterator for each sub-table in the smbios blob.
void *
smbios_next(struct smbios_entry_point *smbios, void *prev)
{
    if (!smbios)
        return NULL;
    void *start = (void*)smbios->structure_table_address;
    void *end = start + smbios->structure_table_length;

    if (!prev) {
        prev = start;
    } else {
        struct smbios_structure_header *hdr = prev;
        if (prev + sizeof(*hdr) > end)
            return NULL;
        prev += hdr->length + 2;
        while (prev < end && (*(u8*)(prev-1) != '\0' || *(u8*)(prev-2) != '\0'))
            prev++;
    }
    struct smbios_structure_header *hdr = prev;
    if (prev >= end || prev + sizeof(*hdr) >= end || prev + hdr->length >= end)
        return NULL;
    return prev;
}

struct smbios_entry_point *SMBiosAddr;

void
copy_smbios(void *pos)
{
    if (SMBiosAddr)
        return;
    struct smbios_entry_point *p = pos;
    if (p->signature != SMBIOS_SIGNATURE)
        return;
    if (checksum(pos, 0x10) != 0)
        return;
    if (memcmp(p->intermediate_anchor_string, "_DMI_", 5))
        return;
    if (checksum(pos+0x10, p->length-0x10) != 0)
        return;
    struct smbios_entry_point *newpos = malloc_fseg(p->length);
    if (!newpos) {
        warn_noalloc();
        return;
    }
    dprintf(1, "Copying SMBIOS entry point from %p to %p\n", pos, newpos);
    memcpy(newpos, pos, p->length);
    SMBiosAddr = newpos;
}

void
display_uuid(void)
{
    struct smbios_type_1 *tbl = smbios_next(SMBiosAddr, NULL);
    int minlen = offsetof(struct smbios_type_1, uuid) + sizeof(tbl->uuid);
    for (; tbl; tbl = smbios_next(SMBiosAddr, tbl))
        if (tbl->header.type == 1 && tbl->header.length >= minlen) {
            u8 *uuid = tbl->uuid;
            u8 empty_uuid[sizeof(tbl->uuid)] = { 0 };
            if (memcmp(uuid, empty_uuid, sizeof(empty_uuid)) == 0)
                return;

            /*
             * According to SMBIOS v2.6 the first three fields are encoded in
             * little-endian format.  Versions prior to v2.6 did not specify
             * the encoding, but we follow dmidecode and assume big-endian
             * encoding.
             */
            if (SMBiosAddr->smbios_major_version > 2 ||
                (SMBiosAddr->smbios_major_version == 2 &&
                 SMBiosAddr->smbios_minor_version >= 6)) {
                printf("Machine UUID"
                       " %02x%02x%02x%02x"
                       "-%02x%02x"
                       "-%02x%02x"
                       "-%02x%02x"
                       "-%02x%02x%02x%02x%02x%02x\n"
                       , uuid[ 3], uuid[ 2], uuid[ 1], uuid[ 0]
                       , uuid[ 5], uuid[ 4]
                       , uuid[ 7], uuid[ 6]
                       , uuid[ 8], uuid[ 9]
                       , uuid[10], uuid[11], uuid[12]
                       , uuid[13], uuid[14], uuid[15]);
            } else {
                printf("Machine UUID"
                       " %02x%02x%02x%02x"
                       "-%02x%02x"
                       "-%02x%02x"
                       "-%02x%02x"
                       "-%02x%02x%02x%02x%02x%02x\n"
                       , uuid[ 0], uuid[ 1], uuid[ 2], uuid[ 3]
                       , uuid[ 4], uuid[ 5]
                       , uuid[ 6], uuid[ 7]
                       , uuid[ 8], uuid[ 9]
                       , uuid[10], uuid[11], uuid[12]
                       , uuid[13], uuid[14], uuid[15]);
            }

            return;
        }
}

#define set_str_field_or_skip(type, field, value)                       \
    do {                                                                \
        int size = (value != NULL) ? strlen(value) + 1 : 0;             \
        if (size > 1) {                                                 \
            memcpy(end, value, size);                                   \
            end += size;                                                \
            p->field = ++str_index;                                     \
        } else {                                                        \
            p->field = 0;                                               \
        }                                                               \
    } while (0)

static void *
smbios_new_type_0(void *start,
                  const char *vendor, const char *version, const char *date)
{
    struct smbios_type_0 *p = (struct smbios_type_0 *)start;
    char *end = (char *)start + sizeof(struct smbios_type_0);
    int str_index = 0;

    p->header.type = 0;
    p->header.length = sizeof(struct smbios_type_0);
    p->header.handle = 0;

    set_str_field_or_skip(0, vendor_str, vendor);
    set_str_field_or_skip(0, bios_version_str, version);
    p->bios_starting_address_segment = 0xe800;
    set_str_field_or_skip(0, bios_release_date_str, date);

    p->bios_rom_size = 0; /* FIXME */

    /* BIOS characteristics not supported */
    memset(p->bios_characteristics, 0, 8);
    p->bios_characteristics[0] = 0x08;

    /* Enable targeted content distribution (needed for SVVP) */
    p->bios_characteristics_extension_bytes[0] = 0;
    p->bios_characteristics_extension_bytes[1] = 4;

    p->system_bios_major_release = 0;
    p->system_bios_minor_release = 0;
    p->embedded_controller_major_release = 0xFF;
    p->embedded_controller_minor_release = 0xFF;

    *end = 0;
    end++;
    if (!str_index) {
        *end = 0;
        end++;
    }

    return end;
}

#define BIOS_NAME "SeaBIOS"
#define BIOS_DATE "04/01/2014"

static int
smbios_romfile_setup(void)
{
    struct romfile_s *f_anchor = romfile_find("etc/smbios/smbios-anchor");
    struct romfile_s *f_tables = romfile_find("etc/smbios/smbios-tables");
    struct smbios_entry_point ep;
    struct smbios_type_0 *t0;
    u16 qtables_len, need_t0 = 1;
    u8 *qtables, *tables;

    if (!f_anchor || !f_tables || f_anchor->size != sizeof(ep))
        return 0;

    f_anchor->copy(f_anchor, &ep, f_anchor->size);

    if (f_tables->size != ep.structure_table_length)
        return 0;

    qtables = malloc_tmphigh(f_tables->size);
    if (!qtables) {
        warn_noalloc();
        return 0;
    }
    f_tables->copy(f_tables, qtables, f_tables->size);
    ep.structure_table_address = (u32)qtables; /* for smbios_next(), below */

    /* did we get a type 0 structure ? */
    for (t0 = smbios_next(&ep, NULL); t0; t0 = smbios_next(&ep, t0))
        if (t0->header.type == 0) {
            need_t0 = 0;
            break;
        }

    qtables_len = ep.structure_table_length;
    if (need_t0) {
        /* common case: add our own type 0, with 3 strings and 4 '\0's */
        u16 t0_len = sizeof(struct smbios_type_0) + strlen(BIOS_NAME) +
                     strlen(VERSION) + strlen(BIOS_DATE) + 4;
        ep.structure_table_length += t0_len;
        if (t0_len > ep.max_structure_size)
            ep.max_structure_size = t0_len;
        ep.number_of_structures++;
    }

    /* allocate final blob and record its address in the entry point */
    if (ep.structure_table_length > BUILD_MAX_SMBIOS_FSEG)
        tables = malloc_high(ep.structure_table_length);
    else
        tables = malloc_fseg(ep.structure_table_length);
    if (!tables) {
        warn_noalloc();
        free(qtables);
        return 0;
    }
    ep.structure_table_address = (u32)tables;

    /* populate final blob */
    if (need_t0)
        tables = smbios_new_type_0(tables, BIOS_NAME, VERSION, BIOS_DATE);
    memcpy(tables, qtables, qtables_len);
    free(qtables);

    /* finalize entry point */
    ep.checksum -= checksum(&ep, 0x10);
    ep.intermediate_checksum -= checksum((void *)&ep + 0x10, ep.length - 0x10);

    copy_smbios(&ep);
    return 1;
}

void
smbios_setup(void)
{
    if (smbios_romfile_setup())
        return;
    smbios_legacy_setup();
}

void
copy_table(void *pos)
{
    copy_pir(pos);
    copy_mptable(pos);
    copy_acpi_rsdp(pos);
    copy_smbios(pos);
}