2
* Copyright 1993 by Thomas Mueller
4
* Permission to use, copy, modify, distribute, and sell this software and its
5
* documentation for any purpose is hereby granted without fee, provided that
6
* the above copyright notice appear in all copies and that both that
7
* copyright notice and this permission notice appear in supporting
8
* documentation, and that the name of Thomas Mueller not be used in
9
* advertising or publicity pertaining to distribution of the software without
10
* specific, written prior permission. Thomas Mueller makes no representations
11
* about the suitability of this software for any purpose. It is provided
12
* "as is" without express or implied warranty.
14
* THOMAS MUELLER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16
* EVENT SHALL THOMAS MUELLER BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
20
* PERFORMANCE OF THIS SOFTWARE.
24
/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/lynxos/lynx_video.c,v 3.18 2002/12/14 04:41:14 dawes Exp $ */
28
#include "scrnintstr.h"
32
#include "xf86_OSlib.h"
33
#include "xf86OSpriv.h"
35
#if defined(__powerpc__)
37
# if defined(USE_MACHINE_ABSOLUTE)
38
# include <machine/absolute.h>
40
# define __USER_SPACE_INCLUDE
41
# include <hw_absolute.h>
44
void ppcPciIoMap(int bus);
51
#ifdef HAS_MTRR_SUPPORT
52
#include <sys/memrange.h>
53
#define X_MTRR_ID "XFree86"
55
static pointer setWC(int, unsigned long, unsigned long, Bool, MessageType);
56
static void undoWC(int, pointer);
57
static Bool cleanMTRR(void);
58
static int devMemFd = -1;
59
#define MTRR_DEVICE "/dev/mtrr"
66
int smem_remove(char *name)
71
char *smem_create(char *name, char *arg_addr, long size, int mode)
77
int prot = PROT_READ|PROT_WRITE|PROT_UNCACHE;
78
int flags = MAP_SHARED;
79
off_t off = (off_t)arg_addr;
81
if ((fd = open("/dev/mem" , O_RDWR)) < 0)
87
if (mode == SM_DETACH)
89
munmap(arg_addr, len);
94
if ((retval = mmap (addr, len, prot, flags, fd, off) ) == MAP_FAILED)
109
/***************************************************************************/
110
/* Video Memory Mapping section */
111
/***************************************************************************/
125
static _SMEMS smems[MAX_SMEMS];
129
#define MAP_FAILED ((void *)-1)
137
for (i = 0; i < MAX_SMEMS; i++) {
138
if (*smems[i].name && smems[i].ptr) {
139
(void)smem_create(NULL, smems[i].ptr, 0, SM_DETACH);
140
(void)smem_remove(smems[i].name);
141
*smems[i].name = '\0';
151
MapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags)
162
for (i = 0; i < MAX_SMEMS; i++)
164
if (!*smems[i].name && free_slot == -1)
166
if (smems[i].Base == Base && smems[i].Size == Size
172
if (i == MAX_SMEMS && free_slot == -1)
174
FatalError("MapVidMem: failed to smem_create Base %x Size %x (out of SMEMS entries)\n",
179
sprintf(smems[i].name, "Video-%d", i);
180
smems[i].Base = Base;
181
smems[i].Size = Size;
183
xf86MsgVerb(X_INFO, 3, "MapVidMem: Base=0x%x Size=0x%x\n",
186
#if defined(__powerpc__)
187
if (((unsigned long)Base & PHYS_IO_MEM_START) != PHYS_IO_MEM_START) {
188
Base = Base | PHYS_IO_MEM_START;
192
smems[i].ptr = smem_create(smems[i].name, (char *)Base, Size, SM_READ|SM_WRITE);
194
if (smems[i].ptr == NULL)
196
/* check if there is a stale segment around */
197
if (smem_remove(smems[i].name) == 0) {
199
"MapVidMem: removed stale smem_ segment %s\n",
201
smems[i].ptr = smem_create(smems[i].name,
202
(char *)Base, Size, SM_READ|SM_WRITE);
204
if (smems[i].ptr == NULL) {
205
*smems[i].name = '\0';
206
FatalError("MapVidMem: failed to smem_create Base %x Size %x (%s)\n",
207
Base, Size, strerror(errno));
210
xf86MsgVerb(X_INFO, 3, "MapVidMem: Base=0x%x Size=0x%x Ptr=0x%x\n",
211
Base, Size, smems[i].ptr);
216
UnMapVidMem(int ScreenNum, pointer Base, unsigned long Size)
220
xf86MsgVerb(X_INFO, 3, "UnMapVidMem: Base/Ptr=0x%x Size=0x%x\n",
222
for (i = 0; i < MAX_SMEMS; i++)
224
if (*smems[i].name && smems[i].ptr == Base
225
&& smems[i].Size == Size)
227
if (--smems[i].RefCnt > 0)
230
(void)smem_create(NULL, smems[i].ptr, 0, SM_DETACH);
231
xf86MsgVerb(X_INFO, 3,
232
"UnMapVidMem: smem_create(%s, 0x%08x, ... "
233
"SM_DETACH)\n", smems[i].name, smems[i].ptr);
234
(void)smem_remove(smems[i].name);
235
*smems[i].name = '\0';
240
xf86MsgVerb(X_WARNING, 2,
241
"UnMapVidMem: no SMEM found for Base = %lx Size = %lx\n",
247
xf86OSInitVidMem(VidMemInfoPtr pVidMem)
249
pVidMem->linearSupported = TRUE;
250
pVidMem->mapMem = MapVidMem;
251
pVidMem->unmapMem = UnMapVidMem;
254
#ifdef HAS_MTRR_SUPPORT
256
pVidMem->setWC = setWC;
257
pVidMem->undoWC = undoWC;
260
pVidMem->initialised = TRUE;
264
/***************************************************************************/
265
/* Interrupt Handling section */
266
/***************************************************************************/
269
xf86DisableInterrupts()
275
xf86EnableInterrupts()
280
/***************************************************************************/
281
/* I/O Permissions section for PowerPC */
282
/***************************************************************************/
284
#if defined(__powerpc__)
286
volatile unsigned char *ioBase = MAP_FAILED;
287
volatile unsigned char *pciConfBase = MAP_FAILED;
289
static int IOEnabled;
295
smem_create(NULL, (char *) ioBase, 0, SM_DETACH);
296
smem_remove("IOBASE");
303
if (IOEnabled++ == 0) {
304
ioBase = (unsigned char *) smem_create("IOBASE",
305
(char *)PHYS_ISA_IO_SPACE, 64*1024, SM_READ|SM_WRITE);
306
if (ioBase == MAP_FAILED) {
308
FatalError("xf86EnableIO: Failed to map I/O\n");
311
ErrorF("xf86EnableIO: mapped I/O at vaddr 0x%08x\n",
314
atexit(removeIOSmem);
326
if (--IOEnabled == 0)
333
xf86DisableIOPrivs(void)
347
#ifdef HAS_MTRR_SUPPORT
348
/* memory range (MTRR) support for LynxOS (taken from BSD MTRR support) */
351
* This code is experimental. Some parts may be overkill, and other parts
356
* getAllRanges returns the full list of memory ranges with attributes set.
359
static struct mem_range_desc *
360
getAllRanges(int *nmr)
362
struct mem_range_desc *mrd;
363
struct mem_range_op mro;
366
* Find how many ranges there are. If this fails, then the kernel
367
* probably doesn't have MTRR support.
370
if (ioctl(devMemFd, MEMRANGE_GET, &mro))
372
*nmr = mro.mo_arg[0];
373
mrd = xnfalloc(*nmr * sizeof(struct mem_range_desc));
374
mro.mo_arg[0] = *nmr;
376
if (ioctl(devMemFd, MEMRANGE_GET, &mro)) {
384
* cleanMTRR removes any memory attribute that may be left by a previous
385
* X server. Normally there won't be any, but this takes care of the
386
* case where a server crashed without being able finish cleaning up.
392
struct mem_range_desc *mrd;
393
struct mem_range_op mro;
396
/* This shouldn't happen */
398
if ((devMemFd = open(MTRR_DEVICE, O_RDONLY)) < 0) {
404
if (!(mrd = getAllRanges(&nmr)))
407
for (i = 0; i < nmr; i++) {
408
if (strcmp(mrd[i].mr_owner, X_MTRR_ID) == 0 &&
409
(mrd[i].mr_flags & MDF_ACTIVE)) {
411
ErrorF("Clean for (0x%lx,0x%lx)\n",
412
(unsigned long)mrd[i].mr_base,
413
(unsigned long)mrd[i].mr_len);
415
if (mrd[i].mr_flags & MDF_FIXACTIVE) {
416
mro.mo_arg[0] = MEMRANGE_SET_UPDATE;
417
mrd[i].mr_flags = MDF_UNCACHEABLE;
419
mro.mo_arg[0] = MEMRANGE_SET_REMOVE;
421
mro.mo_desc = mrd + i;
422
ioctl(devMemFd, MEMRANGE_SET, &mro);
432
typedef struct x_RangeRec {
433
struct mem_range_desc mrd;
435
struct x_RangeRec * next;
436
} RangeRec, *RangePtr;
439
freeRangeList(RangePtr range)
451
dupRangeList(RangePtr list)
453
RangePtr new = NULL, rp, p;
457
p = xnfalloc(sizeof(RangeRec));
467
sortRangeList(RangePtr list)
469
RangePtr rp1, rp2, copy, sorted = NULL, minp, prev, minprev;
470
unsigned long minBase;
472
/* Sort by base address */
473
rp1 = copy = dupRangeList(list);
475
minBase = rp1->mrd.mr_base;
481
if (rp2->mrd.mr_base < minBase) {
482
minBase = rp2->mrd.mr_base;
490
minprev->next = minp->next;
502
* findRanges returns a list of ranges that overlap the specified range.
506
findRanges(unsigned long base, unsigned long size, RangePtr *ucp, RangePtr *wcp)
508
struct mem_range_desc *mrd;
512
if (!(mrd = getAllRanges(&nmr)))
515
for (i = 0; i < nmr; i++) {
516
if ((mrd[i].mr_flags & MDF_ACTIVE) &&
517
mrd[i].mr_base < base + size &&
518
mrd[i].mr_base + mrd[i].mr_len > base) {
519
if (mrd[i].mr_flags & MDF_WRITECOMBINE)
521
else if (mrd[i].mr_flags & MDF_UNCACHEABLE)
525
rp = xnfalloc(sizeof(RangeRec));
535
* This checks if the existing overlapping ranges fully cover the requested
536
* range. Is this overkill?
540
fullCoverage(unsigned long base, unsigned long size, RangePtr overlap)
542
RangePtr rp1, sorted = NULL;
545
sorted = sortRangeList(overlap);
550
if (rp1->mrd.mr_base > base) {
551
freeRangeList(sorted);
554
base = rp1->mrd.mr_base + rp1->mrd.mr_len;
557
freeRangeList(sorted);
562
freeRangeList(sorted);
567
addWC(int screenNum, unsigned long base, unsigned long size, MessageType from)
569
RangePtr uc = NULL, wc = NULL, retlist = NULL;
570
struct mem_range_desc mrd;
571
struct mem_range_op mro;
573
findRanges(base, size, &uc, &wc);
575
/* See of the full range is already WC */
576
if (!uc && fullCoverage(base, size, wc)) {
577
xf86DrvMsg(screenNum, from,
578
"Write-combining range (0x%lx,0x%lx) was already set\n",
583
/* Otherwise, try to add the new range */
586
strcpy(mrd.mr_owner, X_MTRR_ID);
587
mrd.mr_flags = MDF_WRITECOMBINE;
589
mro.mo_arg[0] = MEMRANGE_SET_UPDATE;
590
if (ioctl(devMemFd, MEMRANGE_SET, &mro)) {
591
xf86DrvMsg(screenNum, X_WARNING,
592
"Failed to set write-combining range "
593
"(0x%lx,0x%lx)\n", base, size);
596
xf86DrvMsg(screenNum, from,
597
"Write-combining range (0x%lx,0x%lx)\n", base, size);
598
retlist = xnfalloc(sizeof(RangeRec));
600
retlist->wasWC = FALSE;
601
retlist->next = NULL;
607
delWC(int screenNum, unsigned long base, unsigned long size, MessageType from)
609
RangePtr uc = NULL, wc = NULL, retlist = NULL;
610
struct mem_range_desc mrd;
611
struct mem_range_op mro;
613
findRanges(base, size, &uc, &wc);
616
* See of the full range is already not WC, or if there is full
617
* coverage from UC ranges.
619
if (!wc || fullCoverage(base, size, uc)) {
620
xf86DrvMsg(screenNum, from,
621
"Write-combining range (0x%lx,0x%lx) was already clear\n",
626
/* Otherwise, try to add the new range */
629
strcpy(mrd.mr_owner, X_MTRR_ID);
630
mrd.mr_flags = MDF_UNCACHEABLE;
632
mro.mo_arg[0] = MEMRANGE_SET_UPDATE;
633
if (ioctl(devMemFd, MEMRANGE_SET, &mro)) {
634
xf86DrvMsg(screenNum, X_WARNING,
635
"Failed to remove write-combining range "
636
"(0x%lx,0x%lx)\n", base, size);
637
/* XXX Should then remove all of the overlapping WC ranges */
640
xf86DrvMsg(screenNum, from,
641
"Removed Write-combining range (0x%lx,0x%lx)\n",
643
retlist = xnfalloc(sizeof(RangeRec));
645
retlist->wasWC = TRUE;
646
retlist->next = NULL;
652
setWC(int screenNum, unsigned long base, unsigned long size, Bool enable,
656
return addWC(screenNum, base, size, from);
658
return delWC(screenNum, base, size, from);
662
undoWC(int screenNum, pointer list)
665
struct mem_range_op mro;
671
ErrorF("Undo for (0x%lx,0x%lx), %d\n",
672
(unsigned long)rp->mrd.mr_base,
673
(unsigned long)rp->mrd.mr_len, rp->wasWC);
677
mro.mo_arg[0] = MEMRANGE_SET_UPDATE;
678
rp->mrd.mr_flags = MDF_WRITECOMBINE;
679
strcpy(rp->mrd.mr_owner, "unknown");
681
mro.mo_arg[0] = MEMRANGE_SET_REMOVE;
683
mro.mo_desc = &rp->mrd;
685
if (ioctl(devMemFd, MEMRANGE_SET, &mro)) {
687
mro.mo_arg[0] = MEMRANGE_SET_UPDATE;
688
rp->mrd.mr_flags = MDF_UNCACHEABLE;
689
strcpy(rp->mrd.mr_owner, "unknown");
690
if (ioctl(devMemFd, MEMRANGE_SET, &mro))
696
xf86DrvMsg(screenNum, X_WARNING,
697
"Failed to restore MTRR range (0x%lx,0x%lx)\n",
698
(unsigned long)rp->mrd.mr_base,
699
(unsigned long)rp->mrd.mr_len);
705
#endif /* HAS_MTRR_SUPPORT */