695 lines
13 KiB
C
695 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Alpha IO and memory functions.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/string.h>
|
|
#include <linux/module.h>
|
|
#include <asm/io.h>
|
|
|
|
/* Out-of-line versions of the i/o routines that redirect into the
|
|
platform-specific version. Note that "platform-specific" may mean
|
|
"generic", which bumps through the machine vector. */
|
|
|
|
unsigned int
|
|
ioread8(const void __iomem *addr)
|
|
{
|
|
unsigned int ret;
|
|
mb();
|
|
ret = IO_CONCAT(__IO_PREFIX,ioread8)(addr);
|
|
mb();
|
|
return ret;
|
|
}
|
|
|
|
unsigned int ioread16(const void __iomem *addr)
|
|
{
|
|
unsigned int ret;
|
|
mb();
|
|
ret = IO_CONCAT(__IO_PREFIX,ioread16)(addr);
|
|
mb();
|
|
return ret;
|
|
}
|
|
|
|
unsigned int ioread32(const void __iomem *addr)
|
|
{
|
|
unsigned int ret;
|
|
mb();
|
|
ret = IO_CONCAT(__IO_PREFIX,ioread32)(addr);
|
|
mb();
|
|
return ret;
|
|
}
|
|
|
|
u64 ioread64(const void __iomem *addr)
|
|
{
|
|
unsigned int ret;
|
|
mb();
|
|
ret = IO_CONCAT(__IO_PREFIX,ioread64)(addr);
|
|
mb();
|
|
return ret;
|
|
}
|
|
|
|
void iowrite8(u8 b, void __iomem *addr)
|
|
{
|
|
mb();
|
|
IO_CONCAT(__IO_PREFIX,iowrite8)(b, addr);
|
|
}
|
|
|
|
void iowrite16(u16 b, void __iomem *addr)
|
|
{
|
|
mb();
|
|
IO_CONCAT(__IO_PREFIX,iowrite16)(b, addr);
|
|
}
|
|
|
|
void iowrite32(u32 b, void __iomem *addr)
|
|
{
|
|
mb();
|
|
IO_CONCAT(__IO_PREFIX,iowrite32)(b, addr);
|
|
}
|
|
|
|
void iowrite64(u64 b, void __iomem *addr)
|
|
{
|
|
mb();
|
|
IO_CONCAT(__IO_PREFIX,iowrite64)(b, addr);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ioread8);
|
|
EXPORT_SYMBOL(ioread16);
|
|
EXPORT_SYMBOL(ioread32);
|
|
EXPORT_SYMBOL(ioread64);
|
|
EXPORT_SYMBOL(iowrite8);
|
|
EXPORT_SYMBOL(iowrite16);
|
|
EXPORT_SYMBOL(iowrite32);
|
|
EXPORT_SYMBOL(iowrite64);
|
|
|
|
u8 inb(unsigned long port)
|
|
{
|
|
return ioread8(ioport_map(port, 1));
|
|
}
|
|
|
|
u16 inw(unsigned long port)
|
|
{
|
|
return ioread16(ioport_map(port, 2));
|
|
}
|
|
|
|
u32 inl(unsigned long port)
|
|
{
|
|
return ioread32(ioport_map(port, 4));
|
|
}
|
|
|
|
void outb(u8 b, unsigned long port)
|
|
{
|
|
iowrite8(b, ioport_map(port, 1));
|
|
}
|
|
|
|
void outw(u16 b, unsigned long port)
|
|
{
|
|
iowrite16(b, ioport_map(port, 2));
|
|
}
|
|
|
|
void outl(u32 b, unsigned long port)
|
|
{
|
|
iowrite32(b, ioport_map(port, 4));
|
|
}
|
|
|
|
EXPORT_SYMBOL(inb);
|
|
EXPORT_SYMBOL(inw);
|
|
EXPORT_SYMBOL(inl);
|
|
EXPORT_SYMBOL(outb);
|
|
EXPORT_SYMBOL(outw);
|
|
EXPORT_SYMBOL(outl);
|
|
|
|
u8 __raw_readb(const volatile void __iomem *addr)
|
|
{
|
|
return IO_CONCAT(__IO_PREFIX,readb)(addr);
|
|
}
|
|
|
|
u16 __raw_readw(const volatile void __iomem *addr)
|
|
{
|
|
return IO_CONCAT(__IO_PREFIX,readw)(addr);
|
|
}
|
|
|
|
u32 __raw_readl(const volatile void __iomem *addr)
|
|
{
|
|
return IO_CONCAT(__IO_PREFIX,readl)(addr);
|
|
}
|
|
|
|
u64 __raw_readq(const volatile void __iomem *addr)
|
|
{
|
|
return IO_CONCAT(__IO_PREFIX,readq)(addr);
|
|
}
|
|
|
|
void __raw_writeb(u8 b, volatile void __iomem *addr)
|
|
{
|
|
IO_CONCAT(__IO_PREFIX,writeb)(b, addr);
|
|
}
|
|
|
|
void __raw_writew(u16 b, volatile void __iomem *addr)
|
|
{
|
|
IO_CONCAT(__IO_PREFIX,writew)(b, addr);
|
|
}
|
|
|
|
void __raw_writel(u32 b, volatile void __iomem *addr)
|
|
{
|
|
IO_CONCAT(__IO_PREFIX,writel)(b, addr);
|
|
}
|
|
|
|
void __raw_writeq(u64 b, volatile void __iomem *addr)
|
|
{
|
|
IO_CONCAT(__IO_PREFIX,writeq)(b, addr);
|
|
}
|
|
|
|
EXPORT_SYMBOL(__raw_readb);
|
|
EXPORT_SYMBOL(__raw_readw);
|
|
EXPORT_SYMBOL(__raw_readl);
|
|
EXPORT_SYMBOL(__raw_readq);
|
|
EXPORT_SYMBOL(__raw_writeb);
|
|
EXPORT_SYMBOL(__raw_writew);
|
|
EXPORT_SYMBOL(__raw_writel);
|
|
EXPORT_SYMBOL(__raw_writeq);
|
|
|
|
u8 readb(const volatile void __iomem *addr)
|
|
{
|
|
u8 ret;
|
|
mb();
|
|
ret = __raw_readb(addr);
|
|
mb();
|
|
return ret;
|
|
}
|
|
|
|
u16 readw(const volatile void __iomem *addr)
|
|
{
|
|
u16 ret;
|
|
mb();
|
|
ret = __raw_readw(addr);
|
|
mb();
|
|
return ret;
|
|
}
|
|
|
|
u32 readl(const volatile void __iomem *addr)
|
|
{
|
|
u32 ret;
|
|
mb();
|
|
ret = __raw_readl(addr);
|
|
mb();
|
|
return ret;
|
|
}
|
|
|
|
u64 readq(const volatile void __iomem *addr)
|
|
{
|
|
u64 ret;
|
|
mb();
|
|
ret = __raw_readq(addr);
|
|
mb();
|
|
return ret;
|
|
}
|
|
|
|
void writeb(u8 b, volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
__raw_writeb(b, addr);
|
|
}
|
|
|
|
void writew(u16 b, volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
__raw_writew(b, addr);
|
|
}
|
|
|
|
void writel(u32 b, volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
__raw_writel(b, addr);
|
|
}
|
|
|
|
void writeq(u64 b, volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
__raw_writeq(b, addr);
|
|
}
|
|
|
|
EXPORT_SYMBOL(readb);
|
|
EXPORT_SYMBOL(readw);
|
|
EXPORT_SYMBOL(readl);
|
|
EXPORT_SYMBOL(readq);
|
|
EXPORT_SYMBOL(writeb);
|
|
EXPORT_SYMBOL(writew);
|
|
EXPORT_SYMBOL(writel);
|
|
EXPORT_SYMBOL(writeq);
|
|
|
|
/*
|
|
* The _relaxed functions must be ordered w.r.t. each other, but they don't
|
|
* have to be ordered w.r.t. other memory accesses.
|
|
*/
|
|
u8 readb_relaxed(const volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
return __raw_readb(addr);
|
|
}
|
|
|
|
u16 readw_relaxed(const volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
return __raw_readw(addr);
|
|
}
|
|
|
|
u32 readl_relaxed(const volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
return __raw_readl(addr);
|
|
}
|
|
|
|
u64 readq_relaxed(const volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
return __raw_readq(addr);
|
|
}
|
|
|
|
EXPORT_SYMBOL(readb_relaxed);
|
|
EXPORT_SYMBOL(readw_relaxed);
|
|
EXPORT_SYMBOL(readl_relaxed);
|
|
EXPORT_SYMBOL(readq_relaxed);
|
|
|
|
/*
|
|
* Read COUNT 8-bit bytes from port PORT into memory starting at SRC.
|
|
*/
|
|
void ioread8_rep(const void __iomem *port, void *dst, unsigned long count)
|
|
{
|
|
while ((unsigned long)dst & 0x3) {
|
|
if (!count)
|
|
return;
|
|
count--;
|
|
*(unsigned char *)dst = ioread8(port);
|
|
dst += 1;
|
|
}
|
|
|
|
while (count >= 4) {
|
|
unsigned int w;
|
|
count -= 4;
|
|
w = ioread8(port);
|
|
w |= ioread8(port) << 8;
|
|
w |= ioread8(port) << 16;
|
|
w |= ioread8(port) << 24;
|
|
*(unsigned int *)dst = w;
|
|
dst += 4;
|
|
}
|
|
|
|
while (count) {
|
|
--count;
|
|
*(unsigned char *)dst = ioread8(port);
|
|
dst += 1;
|
|
}
|
|
}
|
|
|
|
void insb(unsigned long port, void *dst, unsigned long count)
|
|
{
|
|
ioread8_rep(ioport_map(port, 1), dst, count);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ioread8_rep);
|
|
EXPORT_SYMBOL(insb);
|
|
|
|
/*
|
|
* 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 ioread16_rep(const void __iomem *port, void *dst, unsigned long count)
|
|
{
|
|
if (unlikely((unsigned long)dst & 0x3)) {
|
|
if (!count)
|
|
return;
|
|
BUG_ON((unsigned long)dst & 0x1);
|
|
count--;
|
|
*(unsigned short *)dst = ioread16(port);
|
|
dst += 2;
|
|
}
|
|
|
|
while (count >= 2) {
|
|
unsigned int w;
|
|
count -= 2;
|
|
w = ioread16(port);
|
|
w |= ioread16(port) << 16;
|
|
*(unsigned int *)dst = w;
|
|
dst += 4;
|
|
}
|
|
|
|
if (count) {
|
|
*(unsigned short*)dst = ioread16(port);
|
|
}
|
|
}
|
|
|
|
void insw(unsigned long port, void *dst, unsigned long count)
|
|
{
|
|
ioread16_rep(ioport_map(port, 2), dst, count);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ioread16_rep);
|
|
EXPORT_SYMBOL(insw);
|
|
|
|
|
|
/*
|
|
* 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 ioread32_rep(const void __iomem *port, void *dst, unsigned long count)
|
|
{
|
|
if (unlikely((unsigned long)dst & 0x3)) {
|
|
while (count--) {
|
|
struct S { int x __attribute__((packed)); };
|
|
((struct S *)dst)->x = ioread32(port);
|
|
dst += 4;
|
|
}
|
|
} else {
|
|
/* Buffer 32-bit aligned. */
|
|
while (count--) {
|
|
*(unsigned int *)dst = ioread32(port);
|
|
dst += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
void insl(unsigned long port, void *dst, unsigned long count)
|
|
{
|
|
ioread32_rep(ioport_map(port, 4), dst, count);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ioread32_rep);
|
|
EXPORT_SYMBOL(insl);
|
|
|
|
|
|
/*
|
|
* 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 iowrite8_rep(void __iomem *port, const void *xsrc, unsigned long count)
|
|
{
|
|
const unsigned char *src = xsrc;
|
|
while (count--)
|
|
iowrite8(*src++, port);
|
|
}
|
|
|
|
void outsb(unsigned long port, const void *src, unsigned long count)
|
|
{
|
|
iowrite8_rep(ioport_map(port, 1), src, count);
|
|
}
|
|
|
|
EXPORT_SYMBOL(iowrite8_rep);
|
|
EXPORT_SYMBOL(outsb);
|
|
|
|
|
|
/*
|
|
* 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 iowrite16_rep(void __iomem *port, const void *src, unsigned long count)
|
|
{
|
|
if (unlikely((unsigned long)src & 0x3)) {
|
|
if (!count)
|
|
return;
|
|
BUG_ON((unsigned long)src & 0x1);
|
|
iowrite16(*(unsigned short *)src, port);
|
|
src += 2;
|
|
--count;
|
|
}
|
|
|
|
while (count >= 2) {
|
|
unsigned int w;
|
|
count -= 2;
|
|
w = *(unsigned int *)src;
|
|
src += 4;
|
|
iowrite16(w >> 0, port);
|
|
iowrite16(w >> 16, port);
|
|
}
|
|
|
|
if (count) {
|
|
iowrite16(*(unsigned short *)src, port);
|
|
}
|
|
}
|
|
|
|
void outsw(unsigned long port, const void *src, unsigned long count)
|
|
{
|
|
iowrite16_rep(ioport_map(port, 2), src, count);
|
|
}
|
|
|
|
EXPORT_SYMBOL(iowrite16_rep);
|
|
EXPORT_SYMBOL(outsw);
|
|
|
|
|
|
/*
|
|
* 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 iowrite32_rep(void __iomem *port, const void *src, unsigned long count)
|
|
{
|
|
if (unlikely((unsigned long)src & 0x3)) {
|
|
while (count--) {
|
|
struct S { int x __attribute__((packed)); };
|
|
iowrite32(((struct S *)src)->x, port);
|
|
src += 4;
|
|
}
|
|
} else {
|
|
/* Buffer 32-bit aligned. */
|
|
while (count--) {
|
|
iowrite32(*(unsigned int *)src, port);
|
|
src += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
void outsl(unsigned long port, const void *src, unsigned long count)
|
|
{
|
|
iowrite32_rep(ioport_map(port, 4), src, count);
|
|
}
|
|
|
|
EXPORT_SYMBOL(iowrite32_rep);
|
|
EXPORT_SYMBOL(outsl);
|
|
|
|
|
|
/*
|
|
* Copy data from IO memory space to "real" memory space.
|
|
* This needs to be optimized.
|
|
*/
|
|
void memcpy_fromio(void *to, const volatile void __iomem *from, long count)
|
|
{
|
|
/* Optimize co-aligned transfers. Everything else gets handled
|
|
a byte at a time. */
|
|
|
|
if (count >= 8 && ((u64)to & 7) == ((u64)from & 7)) {
|
|
count -= 8;
|
|
do {
|
|
*(u64 *)to = __raw_readq(from);
|
|
count -= 8;
|
|
to += 8;
|
|
from += 8;
|
|
} while (count >= 0);
|
|
count += 8;
|
|
}
|
|
|
|
if (count >= 4 && ((u64)to & 3) == ((u64)from & 3)) {
|
|
count -= 4;
|
|
do {
|
|
*(u32 *)to = __raw_readl(from);
|
|
count -= 4;
|
|
to += 4;
|
|
from += 4;
|
|
} while (count >= 0);
|
|
count += 4;
|
|
}
|
|
|
|
if (count >= 2 && ((u64)to & 1) == ((u64)from & 1)) {
|
|
count -= 2;
|
|
do {
|
|
*(u16 *)to = __raw_readw(from);
|
|
count -= 2;
|
|
to += 2;
|
|
from += 2;
|
|
} while (count >= 0);
|
|
count += 2;
|
|
}
|
|
|
|
while (count > 0) {
|
|
*(u8 *) to = __raw_readb(from);
|
|
count--;
|
|
to++;
|
|
from++;
|
|
}
|
|
mb();
|
|
}
|
|
|
|
EXPORT_SYMBOL(memcpy_fromio);
|
|
|
|
|
|
/*
|
|
* Copy data from "real" memory space to IO memory space.
|
|
* This needs to be optimized.
|
|
*/
|
|
void memcpy_toio(volatile void __iomem *to, const void *from, long count)
|
|
{
|
|
/* Optimize co-aligned transfers. Everything else gets handled
|
|
a byte at a time. */
|
|
/* FIXME -- align FROM. */
|
|
|
|
if (count >= 8 && ((u64)to & 7) == ((u64)from & 7)) {
|
|
count -= 8;
|
|
do {
|
|
__raw_writeq(*(const u64 *)from, to);
|
|
count -= 8;
|
|
to += 8;
|
|
from += 8;
|
|
} while (count >= 0);
|
|
count += 8;
|
|
}
|
|
|
|
if (count >= 4 && ((u64)to & 3) == ((u64)from & 3)) {
|
|
count -= 4;
|
|
do {
|
|
__raw_writel(*(const u32 *)from, to);
|
|
count -= 4;
|
|
to += 4;
|
|
from += 4;
|
|
} while (count >= 0);
|
|
count += 4;
|
|
}
|
|
|
|
if (count >= 2 && ((u64)to & 1) == ((u64)from & 1)) {
|
|
count -= 2;
|
|
do {
|
|
__raw_writew(*(const u16 *)from, to);
|
|
count -= 2;
|
|
to += 2;
|
|
from += 2;
|
|
} while (count >= 0);
|
|
count += 2;
|
|
}
|
|
|
|
while (count > 0) {
|
|
__raw_writeb(*(const u8 *) from, to);
|
|
count--;
|
|
to++;
|
|
from++;
|
|
}
|
|
mb();
|
|
}
|
|
|
|
EXPORT_SYMBOL(memcpy_toio);
|
|
|
|
|
|
/*
|
|
* "memset" on IO memory space.
|
|
*/
|
|
void _memset_c_io(volatile void __iomem *to, unsigned long c, long count)
|
|
{
|
|
/* Handle any initial odd byte */
|
|
if (count > 0 && ((u64)to & 1)) {
|
|
__raw_writeb(c, to);
|
|
to++;
|
|
count--;
|
|
}
|
|
|
|
/* Handle any initial odd halfword */
|
|
if (count >= 2 && ((u64)to & 2)) {
|
|
__raw_writew(c, to);
|
|
to += 2;
|
|
count -= 2;
|
|
}
|
|
|
|
/* Handle any initial odd word */
|
|
if (count >= 4 && ((u64)to & 4)) {
|
|
__raw_writel(c, to);
|
|
to += 4;
|
|
count -= 4;
|
|
}
|
|
|
|
/* Handle all full-sized quadwords: we're aligned
|
|
(or have a small count) */
|
|
count -= 8;
|
|
if (count >= 0) {
|
|
do {
|
|
__raw_writeq(c, to);
|
|
to += 8;
|
|
count -= 8;
|
|
} while (count >= 0);
|
|
}
|
|
count += 8;
|
|
|
|
/* The tail is word-aligned if we still have count >= 4 */
|
|
if (count >= 4) {
|
|
__raw_writel(c, to);
|
|
to += 4;
|
|
count -= 4;
|
|
}
|
|
|
|
/* The tail is half-word aligned if we have count >= 2 */
|
|
if (count >= 2) {
|
|
__raw_writew(c, to);
|
|
to += 2;
|
|
count -= 2;
|
|
}
|
|
|
|
/* And finally, one last byte.. */
|
|
if (count) {
|
|
__raw_writeb(c, to);
|
|
}
|
|
mb();
|
|
}
|
|
|
|
EXPORT_SYMBOL(_memset_c_io);
|
|
|
|
/* A version of memcpy used by the vga console routines to move data around
|
|
arbitrarily between screen and main memory. */
|
|
|
|
void
|
|
scr_memcpyw(u16 *d, const u16 *s, unsigned int count)
|
|
{
|
|
const u16 __iomem *ios = (const u16 __iomem *) s;
|
|
u16 __iomem *iod = (u16 __iomem *) d;
|
|
int s_isio = __is_ioaddr(s);
|
|
int d_isio = __is_ioaddr(d);
|
|
|
|
if (s_isio) {
|
|
if (d_isio) {
|
|
/* FIXME: Should handle unaligned ops and
|
|
operation widening. */
|
|
|
|
count /= 2;
|
|
while (count--) {
|
|
u16 tmp = __raw_readw(ios++);
|
|
__raw_writew(tmp, iod++);
|
|
}
|
|
}
|
|
else
|
|
memcpy_fromio(d, ios, count);
|
|
} else {
|
|
if (d_isio)
|
|
memcpy_toio(iod, s, count);
|
|
else
|
|
memcpy(d, s, count);
|
|
}
|
|
}
|
|
|
|
EXPORT_SYMBOL(scr_memcpyw);
|
|
|
|
void __iomem *ioport_map(unsigned long port, unsigned int size)
|
|
{
|
|
return IO_CONCAT(__IO_PREFIX,ioportmap) (port);
|
|
}
|
|
|
|
void ioport_unmap(void __iomem *addr)
|
|
{
|
|
}
|
|
|
|
EXPORT_SYMBOL(ioport_map);
|
|
EXPORT_SYMBOL(ioport_unmap);
|