Revert "alpha: kill xf86SlowBCopyToBus and xf86SlowBCopyFromBus"
The vesa driver still uses slowbcopy_frombus and slowbcopy_tobus.
This reverts commit 5ef53a94ce
.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
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6676f49e34
commit
aa07957373
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@ -1211,6 +1211,8 @@ extern _X_EXPORT void (*xf86WriteMmio32)(int, void *, unsigned long);
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extern _X_EXPORT void (*xf86WriteMmioNB8)(int, void *, unsigned long);
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extern _X_EXPORT void (*xf86WriteMmioNB16)(int, void *, unsigned long);
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extern _X_EXPORT void (*xf86WriteMmioNB32)(int, void *, unsigned long);
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extern _X_EXPORT void xf86SlowBCopyFromBus(unsigned char *, unsigned char *, int);
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extern _X_EXPORT void xf86SlowBCopyToBus(unsigned char *, unsigned char *, int);
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/* Some macros to hide the system dependencies for MMIO accesses */
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/* Changed to kill noise generated by gcc's -Wcast-align */
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@ -1342,4 +1344,18 @@ extern _X_EXPORT void (*xf86WriteMmioNB32)(int, void *, unsigned long);
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# define MMIO_MOVE32(base, offset, val) MMIO_OUT32(base, offset, val)
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# endif /* __alpha__ */
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/*
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* With Intel, the version in os-support/misc/SlowBcopy.s is used.
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* This avoids port I/O during the copy (which causes problems with
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* some hardware).
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*/
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# ifdef __alpha__
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# define slowbcopy_tobus(src,dst,count) xf86SlowBCopyToBus(src,dst,count)
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# define slowbcopy_frombus(src,dst,count) xf86SlowBCopyFromBus(src,dst,count)
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# else /* __alpha__ */
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# define slowbcopy_tobus(src,dst,count) xf86SlowBcopy(src,dst,count)
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# define slowbcopy_frombus(src,dst,count) xf86SlowBcopy(src,dst,count)
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# endif /* __alpha__ */
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#endif /* _COMPILER_H */
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@ -1,8 +1,15 @@
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/*******************************************************************************
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for Alpha Linux
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*******************************************************************************/
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/*
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* Create a dependency that should be immune from the effect of register
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* renaming as is commonly seen in superscalar processors. This should
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* insert a minimum of 100-ns delays between reads/writes at clock rates
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* up to 100 MHz---GGL
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*
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* Slowbcopy(char *src, char *dst, int count)
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*
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*/
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#ifdef HAVE_XORG_CONFIG_H
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@ -47,3 +54,48 @@ xf86SlowBcopy(unsigned char *src, unsigned char *dst, int len)
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while(len--)
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*dst++ = *src++;
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}
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#ifdef __alpha__
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#ifdef linux
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#define SPARSE (7)
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#else
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#define SPARSE 0
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#endif
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void
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xf86SlowBCopyFromBus(unsigned char *src, unsigned char *dst, int count)
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{
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unsigned long addr;
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long result;
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addr = (unsigned long) src;
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while( count ){
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result = *(volatile int *) addr;
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result >>= ((addr>>SPARSE) & 3) * 8;
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*dst++ = (unsigned char) (0xffUL & result);
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addr += 1<<SPARSE;
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count--;
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outb(0x80, 0x00);
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}
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}
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void
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xf86SlowBCopyToBus(unsigned char *src, unsigned char *dst, int count)
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{
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unsigned long addr;
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addr = (unsigned long) dst;
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while(count) {
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*(volatile unsigned int *) addr = (unsigned short)(*src) * 0x01010101;
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src++;
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addr += 1<<SPARSE;
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count--;
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outb(0x80, 0x00);
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}
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}
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#endif
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@ -131,7 +131,7 @@ xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
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return(-1);
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}
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xf86SlowBcopy((unsigned char *)(base+Offset), Buf, Len);
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xf86SlowBCopyFromBus((unsigned char *)(base+Offset), Buf, Len);
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munmap((caddr_t)base, mlen);
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close(fd);
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@ -793,7 +793,7 @@ vgaHWRestoreFonts(ScrnInfoPtr scrninfp, vgaRegPtr restore)
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if (hwp->FontInfo1) {
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hwp->writeSeq(hwp, 0x02, 0x04); /* write to plane 2 */
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hwp->writeGr(hwp, 0x04, 0x02); /* read plane 2 */
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xf86SlowBcopy(hwp->FontInfo1, hwp->Base, FONT_AMOUNT);
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slowbcopy_tobus(hwp->FontInfo1, hwp->Base, FONT_AMOUNT);
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}
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#endif
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@ -801,7 +801,7 @@ vgaHWRestoreFonts(ScrnInfoPtr scrninfp, vgaRegPtr restore)
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if (hwp->FontInfo2) {
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hwp->writeSeq(hwp, 0x02, 0x08); /* write to plane 3 */
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hwp->writeGr(hwp, 0x04, 0x03); /* read plane 3 */
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xf86SlowBcopy(hwp->FontInfo2, hwp->Base, FONT_AMOUNT);
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slowbcopy_tobus(hwp->FontInfo2, hwp->Base, FONT_AMOUNT);
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}
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#endif
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@ -809,10 +809,10 @@ vgaHWRestoreFonts(ScrnInfoPtr scrninfp, vgaRegPtr restore)
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if (hwp->TextInfo) {
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hwp->writeSeq(hwp, 0x02, 0x01); /* write to plane 0 */
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hwp->writeGr(hwp, 0x04, 0x00); /* read plane 0 */
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xf86SlowBcopy(hwp->TextInfo, hwp->Base, TEXT_AMOUNT);
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slowbcopy_tobus(hwp->TextInfo, hwp->Base, TEXT_AMOUNT);
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hwp->writeSeq(hwp, 0x02, 0x02); /* write to plane 1 */
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hwp->writeGr(hwp, 0x04, 0x01); /* read plane 1 */
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xf86SlowBcopy((unsigned char *)hwp->TextInfo + TEXT_AMOUNT,
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slowbcopy_tobus((unsigned char *)hwp->TextInfo + TEXT_AMOUNT,
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hwp->Base, TEXT_AMOUNT);
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}
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#endif
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@ -971,24 +971,24 @@ vgaHWSaveFonts(ScrnInfoPtr scrninfp, vgaRegPtr save)
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if (hwp->FontInfo1 || (hwp->FontInfo1 = xalloc(FONT_AMOUNT))) {
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hwp->writeSeq(hwp, 0x02, 0x04); /* write to plane 2 */
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hwp->writeGr(hwp, 0x04, 0x02); /* read plane 2 */
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xf86SlowBcopy(hwp->Base, hwp->FontInfo1, FONT_AMOUNT);
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slowbcopy_frombus(hwp->Base, hwp->FontInfo1, FONT_AMOUNT);
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}
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#endif /* SAVE_FONT1 */
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#if SAVE_FONT2
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if (hwp->FontInfo2 || (hwp->FontInfo2 = xalloc(FONT_AMOUNT))) {
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hwp->writeSeq(hwp, 0x02, 0x08); /* write to plane 3 */
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hwp->writeGr(hwp, 0x04, 0x03); /* read plane 3 */
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xf86SlowBcopy(hwp->Base, hwp->FontInfo2, FONT_AMOUNT);
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slowbcopy_frombus(hwp->Base, hwp->FontInfo2, FONT_AMOUNT);
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}
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#endif /* SAVE_FONT2 */
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#if SAVE_TEXT
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if (hwp->TextInfo || (hwp->TextInfo = xalloc(2 * TEXT_AMOUNT))) {
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hwp->writeSeq(hwp, 0x02, 0x01); /* write to plane 0 */
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hwp->writeGr(hwp, 0x04, 0x00); /* read plane 0 */
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xf86SlowBcopy(hwp->Base, hwp->TextInfo, TEXT_AMOUNT);
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slowbcopy_frombus(hwp->Base, hwp->TextInfo, TEXT_AMOUNT);
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hwp->writeSeq(hwp, 0x02, 0x02); /* write to plane 1 */
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hwp->writeGr(hwp, 0x04, 0x01); /* read plane 1 */
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xf86SlowBcopy(hwp->Base,
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slowbcopy_frombus(hwp->Base,
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(unsigned char *)hwp->TextInfo + TEXT_AMOUNT, TEXT_AMOUNT);
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}
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#endif /* SAVE_TEXT */
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