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// SPDX-License-Identifier: GPL-2.0
/*
* PeeCeeI.c: The emerging standard...
*
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
*/
#include <linux/module.h>
#include <asm/io.h>
#include <asm/byteorder.h>
void outsb(unsigned long __addr, const void *src, unsigned long count)
{
void __iomem *addr = (void __iomem *) __addr;
const u8 *p = src;
while (count--)
__raw_writeb(*p++, addr);
}
EXPORT_SYMBOL(outsb);
void outsw(unsigned long __addr, const void *src, unsigned long count)
{
void __iomem *addr = (void __iomem *) __addr;
while (count--) {
__raw_writew(*(u16 *)src, addr);
src += sizeof(u16);
}
}
EXPORT_SYMBOL(outsw);
void outsl(unsigned long __addr, const void *src, unsigned long count)
{
void __iomem *addr = (void __iomem *) __addr;
u32 l, l2;
if (!count)
return;
switch (((unsigned long)src) & 0x3) {
case 0x0:
/* src is naturally aligned */
while (count--) {
__raw_writel(*(u32 *)src, addr);
src += sizeof(u32);
}
break;
case 0x2:
/* 2-byte alignment */
while (count--) {
l = (*(u16 *)src) << 16;
l |= *(u16 *)(src + sizeof(u16));
__raw_writel(l, addr);
src += sizeof(u32);
}
break;
case 0x1:
/* Hold three bytes in l each time, grab a byte from l2 */
l = (*(u8 *)src) << 24;
l |= (*(u16 *)(src + sizeof(u8))) << 8;
src += sizeof(u8) + sizeof(u16);
while (count--) {
l2 = *(u32 *)src;
l |= (l2 >> 24);
__raw_writel(l, addr);
l = l2 << 8;
src += sizeof(u32);
}
break;
case 0x3:
/* Hold a byte in l each time, grab 3 bytes from l2 */
l = (*(u8 *)src) << 24;
src += sizeof(u8);
while (count--) {
l2 = *(u32 *)src;
l |= (l2 >> 8);
__raw_writel(l, addr);
l = l2 << 24;
src += sizeof(u32);
}
break;
}
}
EXPORT_SYMBOL(outsl);
void insb(unsigned long __addr, void *dst, unsigned long count)
{
void __iomem *addr = (void __iomem *) __addr;
if (count) {
u32 *pi;
u8 *pb = dst;
while ((((unsigned long)pb) & 0x3) && count--)
*pb++ = __raw_readb(addr);
pi = (u32 *)pb;
while (count >= 4) {
u32 w;
w = (__raw_readb(addr) << 24);
w |= (__raw_readb(addr) << 16);
w |= (__raw_readb(addr) << 8);
w |= (__raw_readb(addr) << 0);
*pi++ = w;
count -= 4;
}
pb = (u8 *)pi;
while (count--)
*pb++ = __raw_readb(addr);
}
}
EXPORT_SYMBOL(insb);
void insw(unsigned long __addr, void *dst, unsigned long count)
{
void __iomem *addr = (void __iomem *) __addr;
if (count) {
u16 *ps = dst;
u32 *pi;
if (((unsigned long)ps) & 0x2) {
*ps++ = __raw_readw(addr);
count--;
}
pi = (u32 *)ps;
while (count >= 2) {
u32 w;
w = __raw_readw(addr) << 16;
w |= __raw_readw(addr) << 0;
*pi++ = w;
count -= 2;
}
ps = (u16 *)pi;
if (count)
*ps = __raw_readw(addr);
}
}
EXPORT_SYMBOL(insw);
void insl(unsigned long __addr, void *dst, unsigned long count)
{
void __iomem *addr = (void __iomem *) __addr;
if (count) {
if ((((unsigned long)dst) & 0x3) == 0) {
u32 *pi = dst;
while (count--)
*pi++ = __raw_readl(addr);
} else {
u32 l = 0, l2, *pi;
u16 *ps;
u8 *pb;
switch (((unsigned long)dst) & 3) {
case 0x2:
ps = dst;
count -= 1;
l = __raw_readl(addr);
*ps++ = l;
pi = (u32 *)ps;
while (count--) {
l2 = __raw_readl(addr);
*pi++ = (l << 16) | (l2 >> 16);
l = l2;
}
ps = (u16 *)pi;
*ps = l;
break;
case 0x1:
pb = dst;
count -= 1;
l = __raw_readl(addr);
*pb++ = l >> 24;
ps = (u16 *)pb;
*ps++ = ((l >> 8) & 0xffff);
pi = (u32 *)ps;
while (count--) {
l2 = __raw_readl(addr);
*pi++ = (l << 24) | (l2 >> 8);
l = l2;
}
pb = (u8 *)pi;
*pb = l;
break;
case 0x3:
pb = (u8 *)dst;
count -= 1;
l = __raw_readl(addr);
*pb++ = l >> 24;
pi = (u32 *)pb;
while (count--) {
l2 = __raw_readl(addr);
*pi++ = (l << 8) | (l2 >> 24);
l = l2;
}
ps = (u16 *)pi;
*ps++ = ((l >> 8) & 0xffff);
pb = (u8 *)ps;
*pb = l;
break;
}
}
}
}
EXPORT_SYMBOL(insl);
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