aboutsummaryrefslogtreecommitdiff
path: root/xorg-server/hw/xfree86/int10/generic.c
blob: abbd36f3cd64c44f73d6d5026881beab5c1a0bf2 (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
/*
 *                   XFree86 int10 module
 *   execute BIOS int 10h calls in x86 real mode environment
 *                 Copyright 1999 Egbert Eich
 */
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#include <string.h>
#include <unistd.h>

#include "xf86.h"
#include "xf86_OSproc.h"
#include "compiler.h"
#define _INT10_PRIVATE
#include "xf86int10.h"
#include "int10Defines.h"
#include "Pci.h"

#define ALLOC_ENTRIES(x) ((V_RAM / x) - 1)

static uint8_t read_b(xf86Int10InfoPtr pInt, int addr);
static uint16_t read_w(xf86Int10InfoPtr pInt, int addr);
static uint32_t read_l(xf86Int10InfoPtr pInt, int addr);
static void write_b(xf86Int10InfoPtr pInt, int addr, uint8_t val);
static void write_w(xf86Int10InfoPtr pInt, int addr, uint16_t val);
static void write_l(xf86Int10InfoPtr pInt, int addr, uint32_t val);

/*
 * the emulator cannot pass a pointer to the current xf86Int10InfoRec
 * to the memory access functions therefore store it here.
 */

typedef struct {
    int shift;
    int entries;
    void *base;
    void *vRam;
    int highMemory;
    void *sysMem;
    char *alloc;
} genericInt10Priv;

#define INTPriv(x) ((genericInt10Priv*)x->private)

int10MemRec genericMem = {
    read_b,
    read_w,
    read_l,
    write_b,
    write_w,
    write_l
};

static void MapVRam(xf86Int10InfoPtr pInt);
static void UnmapVRam(xf86Int10InfoPtr pInt);

#ifdef _PC
#define GET_HIGH_BASE(x) (((V_BIOS + (x) + getpagesize() - 1)/getpagesize()) \
                              * getpagesize())
#endif

static void *sysMem = NULL;

xf86Int10InfoPtr
xf86ExtendedInitInt10(int entityIndex, int Flags)
{
    xf86Int10InfoPtr pInt;
    void *base = 0;
    void *vbiosMem = 0;
    void *options = NULL;
    legacyVGARec vga;
    ScrnInfoPtr pScrn;

    pScrn = xf86FindScreenForEntity(entityIndex);

    options = xf86HandleInt10Options(pScrn, entityIndex);

    if (int10skip(options)) {
        free(options);
        return NULL;
    }

    pInt = (xf86Int10InfoPtr) xnfcalloc(1, sizeof(xf86Int10InfoRec));
    pInt->entityIndex = entityIndex;
    if (!xf86Int10ExecSetup(pInt))
        goto error0;
    pInt->mem = &genericMem;
    pInt->private = (void *) xnfcalloc(1, sizeof(genericInt10Priv));
    INTPriv(pInt)->alloc = (void *) xnfcalloc(1, ALLOC_ENTRIES(getpagesize()));
    pInt->pScrn = pScrn;
    base = INTPriv(pInt)->base = xnfalloc(SYS_BIOS);

    /* FIXME: Shouldn't this be a failure case?  Leaving dev as NULL seems like
     * FIXME: an error
     */
    pInt->dev = xf86GetPciInfoForEntity(entityIndex);

    /*
     * we need to map video RAM MMIO as some chipsets map mmio
     * registers into this range.
     */
    MapVRam(pInt);
#ifdef _PC
    if (!sysMem)
        pci_device_map_legacy(pInt->dev, V_BIOS, BIOS_SIZE + SYS_BIOS - V_BIOS,
                              PCI_DEV_MAP_FLAG_WRITABLE, &sysMem);
    INTPriv(pInt)->sysMem = sysMem;

    if (xf86ReadBIOS(0, 0, base, LOW_PAGE_SIZE) < 0) {
        xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Cannot read int vect\n");
        goto error1;
    }

    /*
     * Retrieve everything between V_BIOS and SYS_BIOS as some system BIOSes
     * have executable code there.
     */
    memset((char *) base + V_BIOS, 0, SYS_BIOS - V_BIOS);
    INTPriv(pInt)->highMemory = V_BIOS;

    if (xf86IsEntityPrimary(entityIndex) && !(initPrimary(options))) {
        if (!xf86int10GetBiosSegment(pInt, (unsigned char *) sysMem - V_BIOS))
            goto error1;

        set_return_trap(pInt);

        pInt->Flags = Flags & (SET_BIOS_SCRATCH | RESTORE_BIOS_SCRATCH);
        if (!(pInt->Flags & SET_BIOS_SCRATCH))
            pInt->Flags &= ~RESTORE_BIOS_SCRATCH;
        xf86Int10SaveRestoreBIOSVars(pInt, TRUE);

    }
    else {
        const BusType location_type = xf86int10GetBiosLocationType(pInt);
        int bios_location = V_BIOS;

        reset_int_vect(pInt);
        set_return_trap(pInt);

        switch (location_type) {
        case BUS_PCI:{
            int err;
            struct pci_device *rom_device =
                xf86GetPciInfoForEntity(pInt->entityIndex);

            vbiosMem = (unsigned char *) base + bios_location;
            err = pci_device_read_rom(rom_device, vbiosMem);
            if (err) {
                xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Cannot read V_BIOS (3) %s\n",
                           strerror(err));
                goto error1;
            }
            INTPriv(pInt)->highMemory = GET_HIGH_BASE(rom_device->rom_size);
            break;
        }
        default:
            goto error1;
        }
        pInt->BIOSseg = V_BIOS >> 4;
        pInt->num = 0xe6;
        LockLegacyVGA(pInt, &vga);
        xf86ExecX86int10(pInt);
        UnlockLegacyVGA(pInt, &vga);
    }
#else
    if (!sysMem) {
        sysMem = xnfalloc(BIOS_SIZE);
        setup_system_bios(sysMem);
    }
    INTPriv(pInt)->sysMem = sysMem;
    setup_int_vect(pInt);
    set_return_trap(pInt);

    /* Retrieve the entire legacy video BIOS segment.  This can be upto
     * 128KiB.
     */
    vbiosMem = (char *) base + V_BIOS;
    memset(vbiosMem, 0, 2 * V_BIOS_SIZE);
    if (pci_device_read_rom(pInt->dev, vbiosMem) != 0
        || pInt->dev->rom_size < V_BIOS_SIZE) {
        xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
                   "Unable to retrieve all of segment 0x0C0000.\n");
    }

    /*
     * If this adapter is the primary, use its post-init BIOS (if we can find
     * it).
     */
    {
        int bios_location = V_BIOS;
        Bool done = FALSE;

        vbiosMem = (unsigned char *) base + bios_location;

        if (xf86IsEntityPrimary(entityIndex)) {
            if (int10_check_bios(pScrn->scrnIndex, bios_location >> 4, vbiosMem))
                done = TRUE;
            else
                xf86DrvMsg(pScrn->scrnIndex, X_INFO,
                           "No legacy BIOS found -- trying PCI\n");
        }
        if (!done) {
            int err;
            struct pci_device *rom_device =
                xf86GetPciInfoForEntity(pInt->entityIndex);

            err = pci_device_read_rom(rom_device, vbiosMem);
            if (err) {
                xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Cannot read V_BIOS (5) %s\n",
                           strerror(err));
                goto error1;
            }
        }
    }

    pInt->BIOSseg = V_BIOS >> 4;
    pInt->num = 0xe6;
    LockLegacyVGA(pInt, &vga);
    xf86ExecX86int10(pInt);
    UnlockLegacyVGA(pInt, &vga);
#endif
    free(options);
    return pInt;

 error1:
    free(base);
    UnmapVRam(pInt);
    free(INTPriv(pInt)->alloc);
    free(pInt->private);
 error0:
    free(pInt);
    free(options);

    return NULL;
}

static void
MapVRam(xf86Int10InfoPtr pInt)
{
    int pagesize = getpagesize();
    int size = ((VRAM_SIZE + pagesize - 1) / pagesize) * pagesize;

    pci_device_map_legacy(pInt->dev, V_RAM, size, PCI_DEV_MAP_FLAG_WRITABLE,
                          &(INTPriv(pInt)->vRam));
    pInt->io = pci_legacy_open_io(pInt->dev, 0, 64 * 1024);
}

static void
UnmapVRam(xf86Int10InfoPtr pInt)
{
    int pagesize = getpagesize();
    int size = ((VRAM_SIZE + pagesize - 1) / pagesize) * pagesize;

    pci_device_unmap_legacy(pInt->dev, INTPriv(pInt)->vRam, size);
    pci_device_close_io(pInt->dev, pInt->io);
    pInt->io = NULL;
}

Bool
MapCurrentInt10(xf86Int10InfoPtr pInt)
{
    /* nothing to do here */
    return TRUE;
}

void
xf86FreeInt10(xf86Int10InfoPtr pInt)
{
    if (!pInt)
        return;
#if defined (_PC)
    xf86Int10SaveRestoreBIOSVars(pInt, FALSE);
#endif
    if (Int10Current == pInt)
        Int10Current = NULL;
    free(INTPriv(pInt)->base);
    UnmapVRam(pInt);
    free(INTPriv(pInt)->alloc);
    free(pInt->private);
    free(pInt);
}

void *
xf86Int10AllocPages(xf86Int10InfoPtr pInt, int num, int *off)
{
    int pagesize = getpagesize();
    int num_pages = ALLOC_ENTRIES(pagesize);
    int i, j;

    for (i = 0; i < (num_pages - num); i++) {
        if (INTPriv(pInt)->alloc[i] == 0) {
            for (j = i; j < (num + i); j++)
                if (INTPriv(pInt)->alloc[j] != 0)
                    break;
            if (j == (num + i))
                break;
            i += num;
        }
    }
    if (i == (num_pages - num))
        return NULL;

    for (j = i; j < (i + num); j++)
        INTPriv(pInt)->alloc[j] = 1;

    *off = (i + 1) * pagesize;

    return (char *) INTPriv(pInt)->base + *off;
}

void
xf86Int10FreePages(xf86Int10InfoPtr pInt, void *pbase, int num)
{
    int pagesize = getpagesize();
    int first =
        (((char *) pbase - (char *) INTPriv(pInt)->base) / pagesize) - 1;
    int i;

    for (i = first; i < (first + num); i++)
        INTPriv(pInt)->alloc[i] = 0;
}

#define OFF(addr) ((addr) & 0xffff)
#if defined _PC
#define HIGH_OFFSET (INTPriv(pInt)->highMemory)
#define HIGH_BASE   V_BIOS
#else
#define HIGH_OFFSET SYS_BIOS
#define HIGH_BASE   SYS_BIOS
#endif
#define SYS(addr) ((addr) >= HIGH_OFFSET)
#define V_ADDR(addr) \
	  (SYS(addr) ? ((char*)INTPriv(pInt)->sysMem) + (addr - HIGH_BASE) \
	   : (((char*)(INTPriv(pInt)->base) + addr)))
#define VRAM_ADDR(addr) (addr - V_RAM)
#define VRAM_BASE (INTPriv(pInt)->vRam)

#define VRAM(addr) ((addr >= V_RAM) && (addr < (V_RAM + VRAM_SIZE)))
#define V_ADDR_RB(addr) \
	(VRAM(addr)) ? MMIO_IN8((uint8_t*)VRAM_BASE,VRAM_ADDR(addr)) \
	   : *(uint8_t*) V_ADDR(addr)
#define V_ADDR_RW(addr) \
	(VRAM(addr)) ? MMIO_IN16((uint16_t*)VRAM_BASE,VRAM_ADDR(addr)) \
	   : ldw_u((void *)V_ADDR(addr))
#define V_ADDR_RL(addr) \
	(VRAM(addr)) ? MMIO_IN32((uint32_t*)VRAM_BASE,VRAM_ADDR(addr)) \
	   : ldl_u((void *)V_ADDR(addr))

#define V_ADDR_WB(addr,val) \
	if(VRAM(addr)) \
	    MMIO_OUT8((uint8_t*)VRAM_BASE,VRAM_ADDR(addr),val); \
	else \
	    *(uint8_t*) V_ADDR(addr) = val;
#define V_ADDR_WW(addr,val) \
	if(VRAM(addr)) \
	    MMIO_OUT16((uint16_t*)VRAM_BASE,VRAM_ADDR(addr),val); \
	else \
	    stw_u((val),(void *)(V_ADDR(addr)));

#define V_ADDR_WL(addr,val) \
	if (VRAM(addr)) \
	    MMIO_OUT32((uint32_t*)VRAM_BASE,VRAM_ADDR(addr),val); \
	else \
	    stl_u(val,(void *)(V_ADDR(addr)));

static uint8_t
read_b(xf86Int10InfoPtr pInt, int addr)
{
    return V_ADDR_RB(addr);
}

static uint16_t
read_w(xf86Int10InfoPtr pInt, int addr)
{
#if X_BYTE_ORDER == X_LITTLE_ENDIAN
    if (OFF(addr + 1) > 0)
        return V_ADDR_RW(addr);
#endif
    return V_ADDR_RB(addr) | (V_ADDR_RB(addr + 1) << 8);
}

static uint32_t
read_l(xf86Int10InfoPtr pInt, int addr)
{
#if X_BYTE_ORDER == X_LITTLE_ENDIAN
    if (OFF(addr + 3) > 2)
        return V_ADDR_RL(addr);
#endif
    return V_ADDR_RB(addr) |
        (V_ADDR_RB(addr + 1) << 8) |
        (V_ADDR_RB(addr + 2) << 16) | (V_ADDR_RB(addr + 3) << 24);
}

static void
write_b(xf86Int10InfoPtr pInt, int addr, uint8_t val)
{
    V_ADDR_WB(addr, val);
}

static void
write_w(xf86Int10InfoPtr pInt, int addr, CARD16 val)
{
#if X_BYTE_ORDER == X_LITTLE_ENDIAN
    if (OFF(addr + 1) > 0) {
        V_ADDR_WW(addr, val);
    }
#endif
    V_ADDR_WB(addr, val);
    V_ADDR_WB(addr + 1, val >> 8);
}

static void
write_l(xf86Int10InfoPtr pInt, int addr, uint32_t val)
{
#if X_BYTE_ORDER == X_LITTLE_ENDIAN
    if (OFF(addr + 3) > 2) {
        V_ADDR_WL(addr, val);
    }
#endif
    V_ADDR_WB(addr, val);
    V_ADDR_WB(addr + 1, val >> 8);
    V_ADDR_WB(addr + 2, val >> 16);
    V_ADDR_WB(addr + 3, val >> 24);
}

void *
xf86int10Addr(xf86Int10InfoPtr pInt, uint32_t addr)
{
    return V_ADDR(addr);
}