/*
* Alpha IO and memory functions.. Just expand the inlines in the header
* files..
*/
#include <linux/kernel.h>
#include <asm/io.h>
/*
* Jensen has a separate "local" and "bus" IO space for
* byte-wide IO.
*/
#ifdef __is_local
unsigned int _bus_inb(unsigned long addr)
{
return __bus_inb(addr);
}
void _bus_outb(unsigned char b, unsigned long addr)
{
__bus_outb(b, addr);
}
#endif
unsigned int _inb(unsigned long addr)
{
return __inb(addr);
}
unsigned int _inw(unsigned long addr)
{
return __inw(addr);
}
unsigned int _inl(unsigned long addr)
{
return __inl(addr);
}
void _outb(unsigned char b, unsigned long addr)
{
__outb(b, addr);
}
void _outw(unsigned short b, unsigned long addr)
{
__outw(b, addr);
}
void _outl(unsigned int b, unsigned long addr)
{
__outl(b, addr);
}
unsigned long _readb(unsigned long addr)
{
return __readb(addr);
}
unsigned long _readw(unsigned long addr)
{
return __readw(addr);
}
unsigned long _readl(unsigned long addr)
{
return __readl(addr);
}
void _writeb(unsigned char b, unsigned long addr)
{
__writeb(b, addr);
}
void _writew(unsigned short b, unsigned long addr)
{
__writew(b, addr);
}
void _writel(unsigned int b, unsigned long addr)
{
__writel(b, addr);
}
/*
* Read COUNT 8-bit bytes from port PORT into memory starting at
* SRC.
*/
void insb (unsigned long port, void *dst, unsigned long count)
{
while (((unsigned long)dst) & 0x3) {
if (!count)
return;
count--;
*(unsigned char *) dst = inb(port);
((unsigned char *) dst)++;
}
while (count >= 4) {
unsigned int w;
count -= 4;
w = inb(port);
w |= inb(port) << 8;
w |= inb(port) << 16;
w |= inb(port) << 24;
*(unsigned int *) dst = w;
((unsigned int *) dst)++;
}
while (count) {
--count;
*(unsigned char *) dst = inb(port);
((unsigned char *) dst)++;
}
}
/*
* Read COUNT 16-bit words from port PORT into memory starting at
* SRC. SRC must be at least short aligned. This is used by the
* IDE driver to read disk sectors. Performance is important, but
* the interfaces seems to be slow: just using the inlined version
* of the inw() breaks things.
*/
void insw (unsigned long port, void *dst, unsigned long count)
{
if (((unsigned long)dst) & 0x3) {
if (((unsigned long)dst) & 0x1) {
panic("insw: memory not short aligned");
}
if (!count)
return;
count--;
*(unsigned short* ) dst = inw(port);
((unsigned short *) dst)++;
}
while (count >= 2) {
unsigned int w;
count -= 2;
w = inw(port);
w |= inw(port) << 16;
*(unsigned int *) dst = w;
((unsigned int *) dst)++;
}
if (count) {
*(unsigned short*) dst = inw(port);
}
}
/*
* Read COUNT 32-bit words from port PORT into memory starting at
* SRC. Now works with any alignment in SRC. Performance is important,
* but the interfaces seems to be slow: just using the inlined version
* of the inl() breaks things.
*/
void insl (unsigned long port, void *dst, unsigned long count)
{
unsigned int l = 0, l2;
if (!count)
return;
switch (((unsigned long) dst) & 0x3)
{
case 0x00: /* Buffer 32-bit aligned */
while (count--)
{
*(unsigned int *) dst = inl(port);
((unsigned int *) dst)++;
}
break;
/* Assuming little endian Alphas in cases 0x01 -- 0x03 ... */
case 0x02: /* Buffer 16-bit aligned */
--count;
l = inl(port);
*(unsigned short *) dst = l;
((unsigned short *) dst)++;
while (count--)
{
l2 = inl(port);
*(unsigned int *) dst = l >> 16 | l2 << 16;
((unsigned int *) dst)++;
l = l2;
}
*(unsigned short *) dst = l >> 16;
break;
case 0x01: /* Buffer 8-bit aligned */
--count;
l = inl(port);
*(unsigned char *) dst = l;
((unsigned char *) dst)++;
*(unsigned short *) dst = l >> 8;
((unsigned short *) dst)++;
while (count--)
{
l2 = inl(port);
*(unsigned int *) dst = l >> 24 | l2 << 8;
((unsigned int *) dst)++;
l = l2;
}
*(unsigned char *) dst = l >> 24;
break;
case 0x03: /* Buffer 8-bit aligned */
--count;
l = inl(port);
*(unsigned char *) dst = l;
((unsigned char *) dst)++;
while (count--)
{
l2 = inl(port);
*(unsigned int *) dst = l << 24 | l2 >> 8;
((unsigned int *) dst)++;
l = l2;
}
*(unsigned short *) dst = l >> 8;
((unsigned short *) dst)++;
*(unsigned char *) dst = l >> 24;
break;
}
}
/*
* Like insb but in the opposite direction.
* Don't worry as much about doing aligned memory transfers:
* doing byte reads the "slow" way isn't nearly as slow as
* doing byte writes the slow way (no r-m-w cycle).
*/
void outsb(unsigned long port, const void * src, unsigned long count)
{
while (count) {
count--;
outb(*(char *)src, port);
((char *) src)++;
}
}
/*
* Like insw but in the opposite direction. This is used by the IDE
* driver to write disk sectors. Performance is important, but the
* interfaces seems to be slow: just using the inlined version of the
* outw() breaks things.
*/
void outsw (unsigned long port, const void *src, unsigned long count)
{
if (((unsigned long)src) & 0x3) {
if (((unsigned long)src) & 0x1) {
panic("outsw: memory not short aligned");
}
outw(*(unsigned short*)src, port);
((unsigned short *) src)++;
--count;
}
while (count >= 2) {
unsigned int w;
count -= 2;
w = *(unsigned int *) src;
((unsigned int *) src)++;
outw(w >> 0, port);
outw(w >> 16, port);
}
if (count) {
outw(*(unsigned short *) src, port);
}
}
/*
* Like insl but in the opposite direction. This is used by the IDE
* driver to write disk sectors. Works with any alignment in SRC.
* Performance is important, but the interfaces seems to be slow:
* just using the inlined version of the outl() breaks things.
*/
void outsl (unsigned long port, const void *src, unsigned long count)
{
unsigned int l = 0, l2;
if (!count)
return;
switch (((unsigned long) src) & 0x3)
{
case 0x00: /* Buffer 32-bit aligned */
while (count--)
{
outl(*(unsigned int *) src, port);
((unsigned int *) src)++;
}
break;
/* Assuming little endian Alphas in cases 0x01 -- 0x03 ... */
case 0x02: /* Buffer 16-bit aligned */
--count;
l = *(unsigned short *) src << 16;
((unsigned short *) src)++;
while (count--)
{
l2 = *(unsigned int *) src;
((unsigned int *) src)++;
outl (l >> 16 | l2 << 16, port);
l = l2;
}
l2 = *(unsigned short *) src;
outl (l >> 16 | l2 << 16, port);
break;
case 0x01: /* Buffer 8-bit aligned */
--count;
l = *(unsigned char *) src << 8;
((unsigned char *) src)++;
l |= *(unsigned short *) src << 16;
((unsigned short *) src)++;
while (count--)
{
l2 = *(unsigned int *) src;
((unsigned int *) src)++;
outl (l >> 8 | l2 << 24, port);
l = l2;
}
l2 = *(unsigned char *) src;
outl (l >> 8 | l2 << 24, port);
break;
case 0x03: /* Buffer 8-bit aligned */
--count;
l = *(unsigned char *) src << 24;
((unsigned char *) src)++;
while (count--)
{
l2 = *(unsigned int *) src;
((unsigned int *) src)++;
outl (l >> 24 | l2 << 8, port);
l = l2;
}
l2 = *(unsigned short *) src;
((unsigned short *) src)++;
l2 |= *(unsigned char *) src << 16;
outl (l >> 24 | l2 << 8, port);
break;
}
}
/*
* Copy data from IO memory space to "real" memory space.
* This needs to be optimized.
*/
void _memcpy_fromio(void * to, unsigned long from, unsigned long count)
{
while (count) {
count--;
*(char *) to = readb(from);
((char *) to)++;
from++;
}
}
/*
* Copy data from "real" memory space to IO memory space.
* This needs to be optimized.
*/
void _memcpy_toio(unsigned long to, void * from, unsigned long count)
{
while (count) {
count--;
writeb(*(char *) from, to);
((char *) from)++;
to++;
}
}
/*
* "memset" on IO memory space.
* This needs to be optimized.
*/
void _memset_io(unsigned long dst, int c, unsigned long count)
{
while (count) {
count--;
writeb(c, dst);
dst++;
}
}
