2 * Alpha IO and memory functions.. Just expand the inlines in the header
6 #include <linux/kernel.h>
7 #include <linux/types.h>
8 #include <linux/string.h>
12 u8 _inb(unsigned long addr)
17 u16 _inw(unsigned long addr)
22 u32 _inl(unsigned long addr)
28 void _outb(u8 b, unsigned long addr)
33 void _outw(u16 b, unsigned long addr)
38 void _outl(u32 b, unsigned long addr)
43 u8 ___raw_readb(unsigned long addr)
48 u16 ___raw_readw(unsigned long addr)
53 u32 ___raw_readl(unsigned long addr)
58 u64 ___raw_readq(unsigned long addr)
63 u8 _readb(unsigned long addr)
65 unsigned long r = __readb(addr);
70 u16 _readw(unsigned long addr)
72 unsigned long r = __readw(addr);
77 u32 _readl(unsigned long addr)
79 unsigned long r = __readl(addr);
84 u64 _readq(unsigned long addr)
86 unsigned long r = __readq(addr);
91 void ___raw_writeb(u8 b, unsigned long addr)
96 void ___raw_writew(u16 b, unsigned long addr)
101 void ___raw_writel(u32 b, unsigned long addr)
106 void ___raw_writeq(u64 b, unsigned long addr)
111 void _writeb(u8 b, unsigned long addr)
117 void _writew(u16 b, unsigned long addr)
123 void _writel(u32 b, unsigned long addr)
129 void _writeq(u64 b, unsigned long addr)
136 * Read COUNT 8-bit bytes from port PORT into memory starting at
139 void insb (unsigned long port, void *dst, unsigned long count)
141 while (((unsigned long)dst) & 0x3) {
145 *(unsigned char *) dst = inb(port);
146 ((unsigned char *) dst)++;
154 w |= inb(port) << 16;
155 w |= inb(port) << 24;
156 *(unsigned int *) dst = w;
157 ((unsigned int *) dst)++;
162 *(unsigned char *) dst = inb(port);
163 ((unsigned char *) dst)++;
169 * Read COUNT 16-bit words from port PORT into memory starting at
170 * SRC. SRC must be at least short aligned. This is used by the
171 * IDE driver to read disk sectors. Performance is important, but
172 * the interfaces seems to be slow: just using the inlined version
173 * of the inw() breaks things.
175 void insw (unsigned long port, void *dst, unsigned long count)
177 if (((unsigned long)dst) & 0x3) {
178 if (((unsigned long)dst) & 0x1) {
179 panic("insw: memory not short aligned");
184 *(unsigned short* ) dst = inw(port);
185 ((unsigned short *) dst)++;
192 w |= inw(port) << 16;
193 *(unsigned int *) dst = w;
194 ((unsigned int *) dst)++;
198 *(unsigned short*) dst = inw(port);
204 * Read COUNT 32-bit words from port PORT into memory starting at
205 * SRC. Now works with any alignment in SRC. Performance is important,
206 * but the interfaces seems to be slow: just using the inlined version
207 * of the inl() breaks things.
209 void insl (unsigned long port, void *dst, unsigned long count)
211 unsigned int l = 0, l2;
216 switch (((unsigned long) dst) & 0x3)
218 case 0x00: /* Buffer 32-bit aligned */
221 *(unsigned int *) dst = inl(port);
222 ((unsigned int *) dst)++;
226 /* Assuming little endian Alphas in cases 0x01 -- 0x03 ... */
228 case 0x02: /* Buffer 16-bit aligned */
232 *(unsigned short *) dst = l;
233 ((unsigned short *) dst)++;
238 *(unsigned int *) dst = l >> 16 | l2 << 16;
239 ((unsigned int *) dst)++;
242 *(unsigned short *) dst = l >> 16;
244 case 0x01: /* Buffer 8-bit aligned */
248 *(unsigned char *) dst = l;
249 ((unsigned char *) dst)++;
250 *(unsigned short *) dst = l >> 8;
251 ((unsigned short *) dst)++;
255 *(unsigned int *) dst = l >> 24 | l2 << 8;
256 ((unsigned int *) dst)++;
259 *(unsigned char *) dst = l >> 24;
261 case 0x03: /* Buffer 8-bit aligned */
265 *(unsigned char *) dst = l;
266 ((unsigned char *) dst)++;
270 *(unsigned int *) dst = l << 24 | l2 >> 8;
271 ((unsigned int *) dst)++;
274 *(unsigned short *) dst = l >> 8;
275 ((unsigned short *) dst)++;
276 *(unsigned char *) dst = l >> 24;
283 * Like insb but in the opposite direction.
284 * Don't worry as much about doing aligned memory transfers:
285 * doing byte reads the "slow" way isn't nearly as slow as
286 * doing byte writes the slow way (no r-m-w cycle).
288 void outsb(unsigned long port, const void * src, unsigned long count)
292 outb(*(char *)src, port);
298 * Like insw but in the opposite direction. This is used by the IDE
299 * driver to write disk sectors. Performance is important, but the
300 * interfaces seems to be slow: just using the inlined version of the
301 * outw() breaks things.
303 void outsw (unsigned long port, const void *src, unsigned long count)
305 if (((unsigned long)src) & 0x3) {
306 if (((unsigned long)src) & 0x1) {
307 panic("outsw: memory not short aligned");
309 outw(*(unsigned short*)src, port);
310 ((unsigned short *) src)++;
317 w = *(unsigned int *) src;
318 ((unsigned int *) src)++;
324 outw(*(unsigned short *) src, port);
330 * Like insl but in the opposite direction. This is used by the IDE
331 * driver to write disk sectors. Works with any alignment in SRC.
332 * Performance is important, but the interfaces seems to be slow:
333 * just using the inlined version of the outl() breaks things.
335 void outsl (unsigned long port, const void *src, unsigned long count)
337 unsigned int l = 0, l2;
342 switch (((unsigned long) src) & 0x3)
344 case 0x00: /* Buffer 32-bit aligned */
347 outl(*(unsigned int *) src, port);
348 ((unsigned int *) src)++;
352 /* Assuming little endian Alphas in cases 0x01 -- 0x03 ... */
354 case 0x02: /* Buffer 16-bit aligned */
357 l = *(unsigned short *) src << 16;
358 ((unsigned short *) src)++;
362 l2 = *(unsigned int *) src;
363 ((unsigned int *) src)++;
364 outl (l >> 16 | l2 << 16, port);
367 l2 = *(unsigned short *) src;
368 outl (l >> 16 | l2 << 16, port);
370 case 0x01: /* Buffer 8-bit aligned */
373 l = *(unsigned char *) src << 8;
374 ((unsigned char *) src)++;
375 l |= *(unsigned short *) src << 16;
376 ((unsigned short *) src)++;
379 l2 = *(unsigned int *) src;
380 ((unsigned int *) src)++;
381 outl (l >> 8 | l2 << 24, port);
384 l2 = *(unsigned char *) src;
385 outl (l >> 8 | l2 << 24, port);
387 case 0x03: /* Buffer 8-bit aligned */
390 l = *(unsigned char *) src << 24;
391 ((unsigned char *) src)++;
394 l2 = *(unsigned int *) src;
395 ((unsigned int *) src)++;
396 outl (l >> 24 | l2 << 8, port);
399 l2 = *(unsigned short *) src;
400 ((unsigned short *) src)++;
401 l2 |= *(unsigned char *) src << 16;
402 outl (l >> 24 | l2 << 8, port);
409 * Copy data from IO memory space to "real" memory space.
410 * This needs to be optimized.
412 void _memcpy_fromio(void * to, unsigned long from, long count)
414 /* Optimize co-aligned transfers. Everything else gets handled
417 if (count >= 8 && ((long)to & 7) == (from & 7)) {
420 *(u64 *)to = __raw_readq(from);
424 } while (count >= 0);
428 if (count >= 4 && ((long)to & 3) == (from & 3)) {
431 *(u32 *)to = __raw_readl(from);
435 } while (count >= 0);
439 if (count >= 2 && ((long)to & 1) == (from & 1)) {
442 *(u16 *)to = __raw_readw(from);
446 } while (count >= 0);
451 *(u8 *) to = __raw_readb(from);
459 * Copy data from "real" memory space to IO memory space.
460 * This needs to be optimized.
462 void _memcpy_toio(unsigned long to, const void * from, long count)
464 /* Optimize co-aligned transfers. Everything else gets handled
466 /* FIXME -- align FROM. */
468 if (count >= 8 && (to & 7) == ((long)from & 7)) {
471 __raw_writeq(*(const u64 *)from, to);
475 } while (count >= 0);
479 if (count >= 4 && (to & 3) == ((long)from & 3)) {
482 __raw_writel(*(const u32 *)from, to);
486 } while (count >= 0);
490 if (count >= 2 && (to & 1) == ((long)from & 1)) {
493 __raw_writew(*(const u16 *)from, to);
497 } while (count >= 0);
502 __raw_writeb(*(const u8 *) from, to);
511 * "memset" on IO memory space.
513 void _memset_c_io(unsigned long to, unsigned long c, long count)
515 /* Handle any initial odd byte */
516 if (count > 0 && (to & 1)) {
522 /* Handle any initial odd halfword */
523 if (count >= 2 && (to & 2)) {
529 /* Handle any initial odd word */
530 if (count >= 4 && (to & 4)) {
536 /* Handle all full-sized quadwords: we're aligned
537 (or have a small count) */
544 } while (count >= 0);
548 /* The tail is word-aligned if we still have count >= 4 */
555 /* The tail is half-word aligned if we have count >= 2 */
562 /* And finally, one last byte.. */
570 scr_memcpyw(u16 *d, const u16 *s, unsigned int count)
572 if (! __is_ioaddr((unsigned long) s)) {
573 /* Source is memory. */
574 if (! __is_ioaddr((unsigned long) d))
577 memcpy_toio(d, s, count);
579 /* Source is screen. */
580 if (! __is_ioaddr((unsigned long) d))
581 memcpy_fromio(d, s, count);
583 /* FIXME: Should handle unaligned ops and
584 operation widening. */
587 u16 tmp = __raw_readw((unsigned long)(s++));
588 __raw_writew(tmp, (unsigned long)(d++));