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Diffstat (limited to 'xorg-server/hw/xfree86/os-support/misc/BUSmemcpy.c')
-rw-r--r--xorg-server/hw/xfree86/os-support/misc/BUSmemcpy.c225
1 files changed, 0 insertions, 225 deletions
diff --git a/xorg-server/hw/xfree86/os-support/misc/BUSmemcpy.c b/xorg-server/hw/xfree86/os-support/misc/BUSmemcpy.c
index b482b867a..0500bf6c1 100644
--- a/xorg-server/hw/xfree86/os-support/misc/BUSmemcpy.c
+++ b/xorg-server/hw/xfree86/os-support/misc/BUSmemcpy.c
@@ -26,233 +26,8 @@ Thanks to Linus Torvalds for contributing this code.
#include "compiler.h"
-/*
- * The Jensen lacks dense memory, thus we have to address the bus via
- * the sparse addressing scheme. These routines are only used in s3im.c
- * Non time critical code uses SlowBCopy_{from/to} bus.
- *
- * Martin Ostermann (ost@comnets.rwth-aachen.de) - Apr.-Sep. 1996
- */
-
-#ifdef TEST_JENSEN_CODE /* define to test the Sparse addressing on a non-Jensen */
-#define LWORD_CODING (0x18)
-#define SPARSE (5)
-#else
#define LWORD_CODING (0x60)
#define SPARSE (7)
-#endif
-
-void
-xf86JensenMemToBus(char *Base, long dst, long src, int count)
-{
- if( ((long)src^((long)dst)) & 3) {
- /* src & dst are NOT aligned to each other */
- unsigned long addr;
- unsigned long low_word, high_word,last_read;
- long rm,loop;
- unsigned long tmp,org,org2,mask,src_org,count_org;
-
- src_org=src;
- count_org=count;
-
- /* add EISA longword coding and round off*/
- addr = (long)(Base+(dst<<SPARSE) + LWORD_CODING) & ~(3<<SPARSE);
- rm = (long)dst & 3;
- count += rm;
-
- count = count_org + rm;
- org = *(volatile unsigned int *)addr;
- __asm__("ldq_u %0,%1"
- :"=r" (low_word):"m" (*(unsigned long *)(src_org)));
- src = src_org - rm;
- if( count > 4 ) {
- last_read = src_org+count_org - 1;
- __asm__("ldq_u %0,%1"
- :"=r" (high_word):"m" (*(unsigned long *)(src+4)));
- __asm__("extll %1,%2,%0"
- :"=r" (low_word)
- :"r" (low_word), "r" ((unsigned long)(src)));
- __asm__("extlh %1,%2,%0"
- :"=r" (tmp)
- :"r" (high_word), "r" ((unsigned long)(src)));
- tmp |= low_word;
- src += 4;
- __asm__("mskqh %1,%2,%0"
- :"=r" (tmp)
- :"r" (tmp), "r" (rm));
- __asm__("mskql %1,%2,%0"
- :"=r" (org2)
- :"r" (org), "r" (rm));
- tmp |= org2;
-
- loop = (count-4) >> 2; /* loop eqv. count>=4 ; count -= 4 */
- while (loop) {
- /* tmp to be stored completly -- need to read next word*/
- low_word = high_word;
- *(volatile unsigned int *) (addr) = tmp;
- __asm__("ldq_u %0,%1"
- :"=r" (high_word):"m" (*(unsigned long*)(src+4)));
- loop --;
- __asm__("extll %1,%2,%0"
- :"=r" (low_word)
- :"r" (low_word), "r" ((unsigned long)src));
- __asm__("extlh %1,%2,%0"
- :"=r" (tmp)
- :"r" (high_word), "r" ((unsigned long)src));
- src += 4;
- tmp |= low_word;
- addr += 4<<SPARSE;
- }
- if ( count & 3 ) {
- /* Store tmp completly, and possibly read one more word.*/
- *(volatile unsigned int *) (addr) = tmp;
- __asm__("ldq_u %0,%1"
- :"=r" (tmp):"m" (*((unsigned long *)(last_read)) ));
- addr += 4<<SPARSE;
- __asm__("extll %1,%2,%0"
- :"=r" (low_word)
- :"r" (high_word), "r" ((unsigned long)src));
- __asm__("extlh %1,%2,%0"
- :"=r" (tmp)
- :"r" (tmp), "r" ((unsigned long)src));
- tmp |= low_word;
- org = *(volatile unsigned int *)addr;
-
- __asm__("mskql %1,%2,%0"
- :"=r" (tmp)
- :"r" (tmp), "r" (count&3));
- __asm__("mskqh %1,%2,%0"
- :"=r" (org)
- :"r" (org), "r" (count&3));
-
- tmp |= org;
- }
- *(volatile unsigned int *) (addr) = tmp;
- return;
- } else { /* count > 4 */
- __asm__("ldq_u %0,%1"
- :"=r" (high_word):"m" (*(unsigned long *)(src+4)));
- __asm__("extll %1,%2,%0"
- :"=r" (low_word)
- :"r" (low_word), "r" ((unsigned long)(src)));
- __asm__("extlh %1,%2,%0"
- :"=r" (tmp)
- :"r" (high_word), "r" ((unsigned long)(src)));
- tmp |= low_word;
- if( count < 4 ) {
-
- mask = -1;
- __asm__("mskqh %1,%2,%0"
- :"=r" (mask)
- :"r" (mask), "r" (rm));
- __asm__("mskql %1,%2,%0"
- :"=r" (mask)
- :"r" (mask), "r" (count));
- tmp = (tmp & mask) | (org & ~mask);
- *(volatile unsigned int *) (addr) = tmp;
- return;
- } else {
- __asm__("mskqh %1,%2,%0"
- :"=r" (tmp)
- :"r" (tmp), "r" (rm));
- __asm__("mskql %1,%2,%0"
- :"=r" (org2)
- :"r" (org), "r" (rm));
-
- tmp |= org2;
- *(volatile unsigned int *) (addr) = tmp;
- return;
- }
- }
- } else { /* src & dst are aligned to each other */
- unsigned long addr;
- unsigned int tmp,org,rm;
- unsigned int *src_r;
-
- /* add EISA longword coding and round off*/
- addr = (long)(Base+(dst<<SPARSE) + LWORD_CODING) & ~(3<<SPARSE);
-
- src_r = (unsigned int*)((long)src & ~3L);
- rm=(long)src & 3;
- count += rm;
-
- tmp = *src_r;
- org = *(volatile unsigned int *)addr;
-
- __asm__("mskqh %1,%2,%0"
- :"=r" (tmp)
- :"r" (tmp), "r" (rm));
- __asm__("mskql %1,%2,%0"
- :"=r" (org)
- :"r" (org), "r" (rm));
-
- tmp |= org;
-
- while (count > 4) {
- *(volatile unsigned int *) addr = tmp;
- addr += 4<<SPARSE;
- src_r += 1;
- tmp = *src_r;
- count -= 4;
- }
-
- org = *(volatile unsigned int *)addr;
- __asm__("mskql %1,%2,%0"
- :"=r" (tmp)
- :"r" (tmp), "r" (count));
- __asm__("mskqh %1,%2,%0"
- :"=r" (org)
- :"r" (org), "r" (count));
- tmp |= org;
- *(volatile unsigned int *) (addr) = tmp;
- }
-}
-
-void
-xf86JensenBusToMem(char *Base, char *dst, unsigned long src, int count)
-{
-#if 0
- /* Optimization of BusToMem() is left as an exercise to the reader ;-)
- * Consider that ldq_u/extlh/extll won't work because of the bus being
- * only 4 bytes wide!
- */
-#else
- unsigned long addr;
- long result;
-
- addr = (unsigned long)(Base+(src<<SPARSE)) ;
- while( addr & (3<<SPARSE) ){
- if(count <= 0) return;
- result = *(volatile int *) addr;
- result >>= ((addr>>SPARSE) & 3) * 8;
- *dst++ = (char) result;
- addr += 1<<SPARSE;
- count--;
- }
- count -=4;
- while(count >= 0){
- int i;
-
- result = *(volatile int *) (addr+LWORD_CODING);
- for(i=4;i--;) {
- *dst++ = (char) result;
- result >>= 8;
- }
- addr += 4<<SPARSE;
- count -= 4;
- }
- count +=4;
-
- while( count ){
- result = *(volatile int *) addr;
- result >>= ((addr>>SPARSE) & 3) * 8;
- *dst++ = (char) result;
- addr += 1<<SPARSE;
- count--;
- }
-#endif
-}
-
static unsigned long __memcpy(unsigned long dest, unsigned long src, int n);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 23:06:26 +0000