/* 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 <asm/page.h> /* I/O is all done through memory accesses */#include <linux/types.h> #ifdef CONFIG_GENERIC_IOMAP#include <asm-generic/iomap.h>#endif #include <asm-generic/pci_iomap.h> #ifndef mmiowb#define mmiowb() do {} while (0)#endif /*****************************************************************************//* * 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_readbstatic inline u8 __raw_readb(const volatile void __iomem *addr){	return *(const volatile u8 __force *) addr;}#endif #ifndef __raw_readwstatic inline u16 __raw_readw(const volatile void __iomem *addr){	return *(const volatile u16 __force *) addr;}#endif #ifndef __raw_readlstatic inline u32 __raw_readl(const volatile void __iomem *addr){	return *(const volatile u32 __force *) addr;}#endif #define readb __raw_readb #define readw readwstatic inline u16 readw(const volatile void __iomem *addr){	return __le16_to_cpu(__raw_readw(addr));} #define readl readlstatic inline u32 readl(const volatile void __iomem *addr){	return __le32_to_cpu(__raw_readl(addr));} #ifndef __raw_writebstatic inline void __raw_writeb(u8 b, volatile void __iomem *addr){	*(volatile u8 __force *) addr = b;}#endif #ifndef __raw_writewstatic inline void __raw_writew(u16 b, volatile void __iomem *addr){	*(volatile u16 __force *) addr = b;}#endif #ifndef __raw_writelstatic inline void __raw_writel(u32 b, volatile void __iomem *addr){	*(volatile u32 __force *) addr = b;}#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#ifndef __raw_readqstatic inline u64 __raw_readq(const volatile void __iomem *addr){	return *(const volatile u64 __force *) addr;}#endif #define readq readqstatic inline u64 readq(const volatile void __iomem *addr){	return __le64_to_cpu(__raw_readq(addr));} #ifndef __raw_writeqstatic inline void __raw_writeq(u64 b, volatile void __iomem *addr){	*(volatile u64 __force *) addr = b;}#endif #define writeq(b, addr) __raw_writeq(__cpu_to_le64(b), addr)#endif /* CONFIG_64BIT */ #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 insbstatic inline void insb(unsigned long addr, void *buffer, int count){	if (count) {		u8 *buf = buffer;		do {			u8 x = __raw_readb(addr + PCI_IOBASE);			*buf++ = x;		} while (--count);	}}#endif #ifndef inswstatic inline void insw(unsigned long addr, void *buffer, int count){	if (count) {		u16 *buf = buffer;		do {			u16 x = __raw_readw(addr + PCI_IOBASE);			*buf++ = x;		} while (--count);	}}#endif #ifndef inslstatic inline void insl(unsigned long addr, void *buffer, int count){	if (count) {		u32 *buf = buffer;		do {			u32 x = __raw_readl(addr + PCI_IOBASE);			*buf++ = x;		} while (--count);	}}#endif #ifndef outsbstatic inline void outsb(unsigned long addr, const void *buffer, int count){	if (count) {		const u8 *buf = buffer;		do {			__raw_writeb(*buf++, addr + PCI_IOBASE);		} while (--count);	}}#endif #ifndef outswstatic inline void outsw(unsigned long addr, const void *buffer, int count){	if (count) {		const u16 *buf = buffer;		do {			__raw_writew(*buf++, addr + PCI_IOBASE);		} while (--count);	}}#endif #ifndef outslstatic inline void outsl(unsigned long addr, const void *buffer, int count){	if (count) {		const u32 *buf = buffer;		do {			__raw_writel(*buf++, addr + PCI_IOBASE);		} while (--count);	}}#endif #ifndef CONFIG_GENERIC_IOMAP#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) #define ioread8_rep(p, dst, count) \	insb((unsigned long) (p), (dst), (count))#define ioread16_rep(p, dst, count) \	insw((unsigned long) (p), (dst), (count))#define ioread32_rep(p, dst, count) \	insl((unsigned long) (p), (dst), (count)) #define iowrite8_rep(p, src, count) \	outsb((unsigned long) (p), (src), (count))#define iowrite16_rep(p, src, count) \	outsw((unsigned long) (p), (src), (count))#define iowrite32_rep(p, src, count) \	outsl((unsigned long) (p), (src), (count))#endif /* CONFIG_GENERIC_IOMAP */ #ifndef IO_SPACE_LIMIT#define IO_SPACE_LIMIT 0xffff#endif #ifdef __KERNEL__ #include <linux/vmalloc.h>#define __io_virt(x) ((void __force *) (x)) #ifndef CONFIG_GENERIC_IOMAPstruct pci_dev;extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); #ifndef pci_iounmapstatic inline void pci_iounmap(struct pci_dev *dev, void __iomem *p){}#endif#endif /* CONFIG_GENERIC_IOMAP */ /* * Change virtual addresses to physical addresses and vv. * These are pretty trivial */#ifndef virt_to_physstatic inline unsigned long virt_to_phys(volatile void *address){	return __pa((unsigned long)address);} static inline void *phys_to_virt(unsigned long address){	return __va(address);}#endif /* * Change "struct page" to physical address. * * This implementation is for the no-MMU case only... if you have an MMU * you'll need to provide your own definitions. */#ifndef CONFIG_MMUstatic inline void __iomem *ioremap(phys_addr_t offset, unsigned long size){	return (void __iomem*) (unsigned long)offset;} #define __ioremap(offset, size, flags)	ioremap(offset, size) #ifndef ioremap_nocache#define ioremap_nocache ioremap#endif #ifndef ioremap_wc#define ioremap_wc ioremap_nocache#endif static inline void iounmap(void __iomem *addr){}#endif /* CONFIG_MMU */ #ifdef CONFIG_HAS_IOPORT#ifndef CONFIG_GENERIC_IOMAPstatic inline void __iomem *ioport_map(unsigned long port, unsigned int nr){	return (void __iomem *) port;} static inline void ioport_unmap(void __iomem *p){}#else /* CONFIG_GENERIC_IOMAP */extern void __iomem *ioport_map(unsigned long port, unsigned int nr);extern void ioport_unmap(void __iomem *p);#endif /* CONFIG_GENERIC_IOMAP */#endif /* CONFIG_HAS_IOPORT */ #ifndef xlate_dev_kmem_ptr#define xlate_dev_kmem_ptr(p)	p#endif#ifndef xlate_dev_mem_ptr#define xlate_dev_mem_ptr(p)	__va(p)#endif #ifdef CONFIG_VIRT_TO_BUS#ifndef virt_to_busstatic inline unsigned long virt_to_bus(volatile void *address){	return ((unsigned long) address);} static inline void *bus_to_virt(unsigned long address){	return (void *) address;}#endif#endif #ifndef memset_io#define memset_io(a, b, c)	memset(__io_virt(a), (b), (c))#endif #ifndef memcpy_fromio#define memcpy_fromio(a, b, c)	memcpy((a), __io_virt(b), (c))#endif#ifndef memcpy_toio#define memcpy_toio(a, b, c)	memcpy(__io_virt(a), (b), (c))#endif #endif /* __KERNEL__ */ #endif /* __ASM_GENERIC_IO_H */