204 lines
3.8 KiB
C
204 lines
3.8 KiB
C
/*
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* PeeCeeI.c: The emerging standard...
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*
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* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
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*/
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#include <asm/io.h>
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#include <asm/byteorder.h>
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void outsb(unsigned long __addr, const void *src, unsigned long count)
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{
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void __iomem *addr = (void __iomem *) __addr;
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const u8 *p = src;
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while (count--)
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outb(*p++, addr);
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}
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void outsw(unsigned long __addr, const void *src, unsigned long count)
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{
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void __iomem *addr = (void __iomem *) __addr;
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while (count--) {
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__raw_writew(*(u16 *)src, addr);
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src += sizeof(u16);
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}
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}
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void outsl(unsigned long __addr, const void *src, unsigned long count)
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{
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void __iomem *addr = (void __iomem *) __addr;
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u32 l, l2;
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if (!count)
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return;
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switch (((unsigned long)src) & 0x3) {
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case 0x0:
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/* src is naturally aligned */
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while (count--) {
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__raw_writel(*(u32 *)src, addr);
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src += sizeof(u32);
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}
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break;
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case 0x2:
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/* 2-byte alignment */
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while (count--) {
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l = (*(u16 *)src) << 16;
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l |= *(u16 *)(src + sizeof(u16));
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__raw_writel(l, addr);
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src += sizeof(u32);
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}
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break;
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case 0x1:
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/* Hold three bytes in l each time, grab a byte from l2 */
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l = (*(u8 *)src) << 24;
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l |= (*(u16 *)(src + sizeof(u8))) << 8;
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src += sizeof(u8) + sizeof(u16);
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while (count--) {
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l2 = *(u32 *)src;
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l |= (l2 >> 24);
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__raw_writel(l, addr);
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l = l2 << 8;
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src += sizeof(u32);
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}
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break;
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case 0x3:
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/* Hold a byte in l each time, grab 3 bytes from l2 */
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l = (*(u8 *)src) << 24;
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src += sizeof(u8);
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while (count--) {
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l2 = *(u32 *)src;
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l |= (l2 >> 8);
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__raw_writel(l, addr);
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l = l2 << 24;
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src += sizeof(u32);
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}
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break;
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}
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}
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void insb(unsigned long __addr, void *dst, unsigned long count)
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{
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void __iomem *addr = (void __iomem *) __addr;
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if (count) {
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u32 *pi;
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u8 *pb = dst;
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while ((((unsigned long)pb) & 0x3) && count--)
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*pb++ = inb(addr);
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pi = (u32 *)pb;
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while (count >= 4) {
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u32 w;
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w = (inb(addr) << 24);
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w |= (inb(addr) << 16);
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w |= (inb(addr) << 8);
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w |= (inb(addr) << 0);
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*pi++ = w;
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count -= 4;
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}
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pb = (u8 *)pi;
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while (count--)
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*pb++ = inb(addr);
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}
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}
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void insw(unsigned long __addr, void *dst, unsigned long count)
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{
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void __iomem *addr = (void __iomem *) __addr;
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if (count) {
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u16 *ps = dst;
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u32 *pi;
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if (((unsigned long)ps) & 0x2) {
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*ps++ = le16_to_cpu(inw(addr));
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count--;
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}
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pi = (u32 *)ps;
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while (count >= 2) {
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u32 w;
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w = (le16_to_cpu(inw(addr)) << 16);
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w |= (le16_to_cpu(inw(addr)) << 0);
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*pi++ = w;
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count -= 2;
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}
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ps = (u16 *)pi;
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if (count)
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*ps = le16_to_cpu(inw(addr));
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}
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}
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void insl(unsigned long __addr, void *dst, unsigned long count)
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{
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void __iomem *addr = (void __iomem *) __addr;
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if (count) {
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if ((((unsigned long)dst) & 0x3) == 0) {
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u32 *pi = dst;
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while (count--)
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*pi++ = le32_to_cpu(inl(addr));
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} else {
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u32 l = 0, l2, *pi;
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u16 *ps;
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u8 *pb;
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switch (((unsigned long)dst) & 3) {
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case 0x2:
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ps = dst;
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count -= 1;
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l = le32_to_cpu(inl(addr));
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*ps++ = l;
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pi = (u32 *)ps;
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while (count--) {
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l2 = le32_to_cpu(inl(addr));
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*pi++ = (l << 16) | (l2 >> 16);
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l = l2;
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}
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ps = (u16 *)pi;
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*ps = l;
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break;
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case 0x1:
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pb = dst;
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count -= 1;
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l = le32_to_cpu(inl(addr));
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*pb++ = l >> 24;
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ps = (u16 *)pb;
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*ps++ = ((l >> 8) & 0xffff);
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pi = (u32 *)ps;
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while (count--) {
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l2 = le32_to_cpu(inl(addr));
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*pi++ = (l << 24) | (l2 >> 8);
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l = l2;
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}
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pb = (u8 *)pi;
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*pb = l;
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break;
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case 0x3:
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pb = (u8 *)dst;
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count -= 1;
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l = le32_to_cpu(inl(addr));
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*pb++ = l >> 24;
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pi = (u32 *)pb;
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while (count--) {
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l2 = le32_to_cpu(inl(addr));
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*pi++ = (l << 8) | (l2 >> 24);
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l = l2;
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}
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ps = (u16 *)pi;
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*ps++ = ((l >> 8) & 0xffff);
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pb = (u8 *)ps;
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*pb = l;
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break;
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}
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}
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}
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}
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