alpha/kernel/io.c

277 void ioread8_rep(const void __iomem *port, void *dst, unsigned long count)
280 		if (!count)
282 		count--;
287 	while (count >= 4) {
289 		count -= 4;
298 	while (count) {
299 		--count;
305 void insb(unsigned long port, void *dst, unsigned long count)
307 	ioread8_rep(ioport_map(port, 1), dst, count);
320 void ioread16_rep(const void __iomem *port, void *dst, unsigned long count)
323 		if (!count)
326 		count--;
331 	while (count >= 2) {
333 		count -= 2;
340 	if (count) {
345 void insw(unsigned long port, void *dst, unsigned long count)
347 	ioread16_rep(ioport_map(port, 2), dst, count);
360 void ioread32_rep(const void __iomem *port, void *dst, unsigned long count)
363 		while (count--) {
370 		while (count--) {
377 void insl(unsigned long port, void *dst, unsigned long count)
379 	ioread32_rep(ioport_map(port, 4), dst, count);
392 void iowrite8_rep(void __iomem *port, const void *xsrc, unsigned long count)
395 	while (count--)
399 void outsb(unsigned long port, const void *src, unsigned long count)
401 	iowrite8_rep(ioport_map(port, 1), src, count);
414 void iowrite16_rep(void __iomem *port, const void *src, unsigned long count)
417 		if (!count)
422 		--count;
425 	while (count >= 2) {
427 		count -= 2;
434 	if (count) {
439 void outsw(unsigned long port, const void *src, unsigned long count)
441 	iowrite16_rep(ioport_map(port, 2), src, count);
454 void iowrite32_rep(void __iomem *port, const void *src, unsigned long count)
457 		while (count--) {
464 		while (count--) {
471 void outsl(unsigned long port, const void *src, unsigned long count)
473 	iowrite32_rep(ioport_map(port, 4), src, count);
484 void memcpy_fromio(void *to, const volatile void __iomem *from, long count)
489 	if (count >= 8 && ((u64)to & 7) == ((u64)from & 7)) {
490 		count -= 8;
493 			count -= 8;
496 		} while (count >= 0);
497 		count += 8;
500 	if (count >= 4 && ((u64)to & 3) == ((u64)from & 3)) {
501 		count -= 4;
504 			count -= 4;
507 		} while (count >= 0);
508 		count += 4;
511 	if (count >= 2 && ((u64)to & 1) == ((u64)from & 1)) {
512 		count -= 2;
515 			count -= 2;
518 		} while (count >= 0);
519 		count += 2;
522 	while (count > 0) {
524 		count--;
538 void memcpy_toio(volatile void __iomem *to, const void *from, long count)
544 	if (count >= 8 && ((u64)to & 7) == ((u64)from & 7)) {
545 		count -= 8;
548 			count -= 8;
551 		} while (count >= 0);
552 		count += 8;
555 	if (count >= 4 && ((u64)to & 3) == ((u64)from & 3)) {
556 		count -= 4;
559 			count -= 4;
562 		} while (count >= 0);
563 		count += 4;
566 	if (count >= 2 && ((u64)to & 1) == ((u64)from & 1)) {
567 		count -= 2;
570 			count -= 2;
573 		} while (count >= 0);
574 		count += 2;
577 	while (count > 0) {
579 		count--;
592 void _memset_c_io(volatile void __iomem *to, unsigned long c, long count)
595 	if (count > 0 && ((u64)to & 1)) {
598 		count--;
602 	if (count >= 2 && ((u64)to & 2)) {
605 		count -= 2;
609 	if (count >= 4 && ((u64)to & 4)) {
612 		count -= 4;
616 	   (or have a small count) */
617 	count -= 8;
618 	if (count >= 0) {
622 			count -= 8;
623 		} while (count >= 0);
625 	count += 8;
627 	/* The tail is word-aligned if we still have count >= 4 */
628 	if (count >= 4) {
631 		count -= 4;
634 	/* The tail is half-word aligned if we have count >= 2 */
635 	if (count >= 2) {
638 		count -= 2;
642 	if (count) {
654 scr_memcpyw(u16 *d, const u16 *s, unsigned int count)
666 			count /= 2;
667 			while (count--) {
673 			memcpy_fromio(d, ios, count);
676 			memcpy_toio(iod, s, count);
678 			memcpy(d, s, count);