PeeCeeI.c
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上传日期:2013-02-24
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文件大小:4k
- /* $Id: PeeCeeI.c,v 1.4 1999/09/06 01:17:35 davem Exp $
- * PeeCeeI.c: The emerging standard...
- *
- * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
- */
- #include <linux/config.h>
- #ifdef CONFIG_PCI
- #include <asm/io.h>
- #include <asm/byteorder.h>
- void outsb(unsigned long addr, const void *src, unsigned long count)
- {
- const u8 *p = src;
- while(count--)
- outb(*p++, addr);
- }
- void outsw(unsigned long addr, const void *src, unsigned long count)
- {
- if(count) {
- u16 *ps = (u16 *)src;
- u32 *pi;
- if(((u64)src) & 0x2) {
- u16 val = le16_to_cpup(ps);
- outw(val, addr);
- ps++;
- count--;
- }
- pi = (u32 *)ps;
- while(count >= 2) {
- u32 w = le32_to_cpup(pi);
- pi++;
- outw(w >> 0, addr);
- outw(w >> 16, addr);
- count -= 2;
- }
- ps = (u16 *)pi;
- if(count) {
- u16 val = le16_to_cpup(ps);
- outw(val, addr);
- }
- }
- }
- void outsl(unsigned long addr, const void *src, unsigned long count)
- {
- if(count) {
- if((((u64)src) & 0x3) == 0) {
- u32 *p = (u32 *)src;
- while(count--) {
- u32 val = cpu_to_le32p(p);
- outl(val, addr);
- p++;
- }
- } else {
- u8 *pb;
- u16 *ps = (u16 *)src;
- u32 l = 0, l2;
- u32 *pi;
- switch(((u64)src) & 0x3) {
- case 0x2:
- count -= 1;
- l = cpu_to_le16p(ps) << 16;
- ps++;
- pi = (u32 *)ps;
- while(count--) {
- l2 = cpu_to_le32p(pi);
- pi++;
- outl(((l >> 16) | (l2 << 16)), addr);
- l = l2;
- }
- ps = (u16 *)pi;
- l2 = cpu_to_le16p(ps);
- outl(((l >> 16) | (l2 << 16)), addr);
- break;
- case 0x1:
- count -= 1;
- pb = (u8 *)src;
- l = (*pb++ << 8);
- ps = (u16 *)pb;
- l2 = cpu_to_le16p(ps);
- ps++;
- l |= (l2 << 16);
- pi = (u32 *)ps;
- while(count--) {
- l2 = cpu_to_le32p(pi);
- pi++;
- outl(((l >> 8) | (l2 << 24)), addr);
- l = l2;
- }
- pb = (u8 *)pi;
- outl(((l >> 8) | (*pb << 24)), addr);
- break;
- case 0x3:
- count -= 1;
- pb = (u8 *)src;
- l = (*pb++ << 24);
- pi = (u32 *)pb;
- while(count--) {
- l2 = cpu_to_le32p(pi);
- pi++;
- outl(((l >> 24) | (l2 << 8)), addr);
- l = l2;
- }
- ps = (u16 *)pi;
- l2 = cpu_to_le16p(ps);
- ps++;
- pb = (u8 *)ps;
- l2 |= (*pb << 16);
- outl(((l >> 24) | (l2 << 8)), addr);
- break;
- }
- }
- }
- }
- void insb(unsigned long addr, void *dst, unsigned long count)
- {
- if(count) {
- u32 *pi;
- u8 *pb = dst;
- while((((unsigned long)pb) & 0x3) && count--)
- *pb++ = inb(addr);
- pi = (u32 *)pb;
- while(count >= 4) {
- u32 w;
- w = (inb(addr) << 24);
- w |= (inb(addr) << 16);
- w |= (inb(addr) << 8);
- w |= (inb(addr) << 0);
- *pi++ = w;
- count -= 4;
- }
- pb = (u8 *)pi;
- while(count--)
- *pb++ = inb(addr);
- }
- }
- void insw(unsigned long addr, void *dst, unsigned long count)
- {
- if(count) {
- u16 *ps = dst;
- u32 *pi;
- if(((unsigned long)ps) & 0x2) {
- *ps++ = le16_to_cpu(inw(addr));
- count--;
- }
- pi = (u32 *)ps;
- while(count >= 2) {
- u32 w;
- w = (le16_to_cpu(inw(addr)) << 16);
- w |= (le16_to_cpu(inw(addr)) << 0);
- *pi++ = w;
- count -= 2;
- }
- ps = (u16 *)pi;
- if(count)
- *ps = le16_to_cpu(inw(addr));
- }
- }
- void insl(unsigned long addr, void *dst, unsigned long count)
- {
- if(count) {
- if((((unsigned long)dst) & 0x3) == 0) {
- u32 *pi = dst;
- while(count--)
- *pi++ = le32_to_cpu(inl(addr));
- } else {
- u32 l = 0, l2, *pi;
- u16 *ps;
- u8 *pb;
- switch(((unsigned long)dst) & 3) {
- case 0x2:
- ps = dst;
- count -= 1;
- l = le32_to_cpu(inl(addr));
- *ps++ = l;
- pi = (u32 *)ps;
- while(count--) {
- l2 = le32_to_cpu(inl(addr));
- *pi++ = (l << 16) | (l2 >> 16);
- l = l2;
- }
- ps = (u16 *)pi;
- *ps = l;
- break;
- case 0x1:
- pb = dst;
- count -= 1;
- l = le32_to_cpu(inl(addr));
- *pb++ = l >> 24;
- ps = (u16 *)pb;
- *ps++ = ((l >> 8) & 0xffff);
- pi = (u32 *)ps;
- while(count--) {
- l2 = le32_to_cpu(inl(addr));
- *pi++ = (l << 24) | (l2 >> 8);
- l = l2;
- }
- pb = (u8 *)pi;
- *pb = l;
- break;
- case 0x3:
- pb = (u8 *)dst;
- count -= 1;
- l = le32_to_cpu(inl(addr));
- *pb++ = l >> 24;
- pi = (u32 *)pb;
- while(count--) {
- l2 = le32_to_cpu(inl(addr));
- *pi++ = (l << 8) | (l2 >> 24);
- l = l2;
- }
- ps = (u16 *)pi;
- *ps++ = ((l >> 8) & 0xffff);
- pb = (u8 *)ps;
- *pb = l;
- break;
- }
- }
- }
- }
- #endif /* CONFIG_PCI */