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/* Generic I/O port emulation, based on MN10300 code
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#ifndef __ASM_GENERIC_IO_H
#define __ASM_GENERIC_IO_H
#include <linux/types.h>
#include <asm/byteorder.h>
/*****************************************************************************/
/*
* readX/writeX() are used to access memory mapped devices. On some
* architectures the memory mapped IO stuff needs to be accessed
* differently. On the simple architectures, we just read/write the
* memory location directly.
*/
#ifndef __raw_readb
#define __raw_readb(a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a))
#endif
#ifndef __raw_readw
#define __raw_readw(a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a))
#endif
#ifndef __raw_readl
#define __raw_readl(a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a))
#endif
#define readb __raw_readb
#define readw(addr) __le16_to_cpu(__raw_readw(addr))
#define readl(addr) __le32_to_cpu(__raw_readl(addr))
#ifndef __raw_writeb
#define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a) = (v))
#endif
#ifndef __raw_writew
#define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a) = (v))
#endif
#ifndef __raw_writel
#define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a) = (v))
#endif
#define writeb __raw_writeb
#define writew(b,addr) __raw_writew(__cpu_to_le16(b),addr)
#define writel(b,addr) __raw_writel(__cpu_to_le32(b),addr)
#ifdef CONFIG_64BIT
static inline u64 __raw_readq(const volatile void __iomem *addr)
{
return *(const volatile u64 __force *) addr;
}
#define readq(addr) __le64_to_cpu(__raw_readq(addr))
static inline void __raw_writeq(u64 b, volatile void __iomem *addr)
{
*(volatile u64 __force *) addr = b;
}
#define writeq(b,addr) __raw_writeq(__cpu_to_le64(b),addr)
#endif
#ifndef PCI_IOBASE
#define PCI_IOBASE ((void __iomem *) 0)
#endif
/*****************************************************************************/
/*
* traditional input/output functions
*/
static inline u8 inb(unsigned long addr)
{
return readb(addr + PCI_IOBASE);
}
static inline u16 inw(unsigned long addr)
{
return readw(addr + PCI_IOBASE);
}
static inline u32 inl(unsigned long addr)
{
return readl(addr + PCI_IOBASE);
}
static inline void outb(u8 b, unsigned long addr)
{
writeb(b, addr + PCI_IOBASE);
}
static inline void outw(u16 b, unsigned long addr)
{
writew(b, addr + PCI_IOBASE);
}
static inline void outl(u32 b, unsigned long addr)
{
writel(b, addr + PCI_IOBASE);
}
#define inb_p(addr) inb(addr)
#define inw_p(addr) inw(addr)
#define inl_p(addr) inl(addr)
#define outb_p(x, addr) outb((x), (addr))
#define outw_p(x, addr) outw((x), (addr))
#define outl_p(x, addr) outl((x), (addr))
#ifndef insb
static inline void insb(unsigned long addr, void *buffer, int count)
{
if (count) {
u8 *buf = buffer;
do {
u8 x = inb(addr);
*buf++ = x;
} while (--count);
}
}
#endif
#ifndef insw
static inline void insw(unsigned long addr, void *buffer, int count)
{
if (count) {
u16 *buf = buffer;
do {
u16 x = inw(addr);
*buf++ = x;
} while (--count);
}
}
#endif
#ifndef insl
static inline void insl(unsigned long addr, void *buffer, int count)
{
if (count) {
u32 *buf = buffer;
do {
u32 x = inl(addr);
*buf++ = x;
} while (--count);
}
}
#endif
#ifndef outsb
static inline void outsb(unsigned long addr, const void *buffer, int count)
{
if (count) {
const u8 *buf = buffer;
do {
outb(*buf++, addr);
} while (--count);
}
}
#endif
#ifndef outsw
static inline void outsw(unsigned long addr, const void *buffer, int count)
{
if (count) {
const u16 *buf = buffer;
do {
outw(*buf++, addr);
} while (--count);
}
}
#endif
#ifndef outsl
static inline void outsl(unsigned long addr, const void *buffer, int count)
{
if (count) {
const u32 *buf = buffer;
do {
outl(*buf++, addr);
} while (--count);
}
}
#endif
static inline void readsl(const void __iomem *addr, void *buf, int len)
{
insl(addr - PCI_IOBASE, buf, len);
}
static inline void readsw(const void __iomem *addr, void *buf, int len)
{
insw(addr - PCI_IOBASE, buf, len);
}
static inline void readsb(const void __iomem *addr, void *buf, int len)
{
insb(addr - PCI_IOBASE, buf, len);
}
static inline void writesl(const void __iomem *addr, const void *buf, int len)
{
outsl(addr - PCI_IOBASE, buf, len);
}
static inline void writesw(const void __iomem *addr, const void *buf, int len)
{
outsw(addr - PCI_IOBASE, buf, len);
}
static inline void writesb(const void __iomem *addr, const void *buf, int len)
{
outsb(addr - PCI_IOBASE, buf, len);
}
#define ioread8(addr) readb(addr)
#define ioread16(addr) readw(addr)
#define ioread16be(addr) __be16_to_cpu(__raw_readw(addr))
#define ioread32(addr) readl(addr)
#define ioread32be(addr) __be32_to_cpu(__raw_readl(addr))
#define iowrite8(v, addr) writeb((v), (addr))
#define iowrite16(v, addr) writew((v), (addr))
#define iowrite16be(v, addr) __raw_writew(__cpu_to_be16(v), addr)
#define iowrite32(v, addr) writel((v), (addr))
#define iowrite32be(v, addr) __raw_writel(__cpu_to_be32(v), addr)
#endif /* __ASM_GENERIC_IO_H */
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