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Diffstat (limited to 'arch/arm/include/asm/io.h')
| -rw-r--r-- | arch/arm/include/asm/io.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h new file mode 100644 index 0000000000..c7f4b62c44 --- /dev/null +++ b/arch/arm/include/asm/io.h @@ -0,0 +1,53 @@ +/* + * linux/include/asm-arm/io.h + * + * Copyright (C) 1996-2000 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Modifications: + * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both + * constant addresses and variable addresses. + * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture + * specific IO header files. + * 27-Mar-1999 PJB Second parameter of memcpy_toio is const.. + * 04-Apr-1999 PJB Added check_signature. + * 12-Dec-1999 RMK More cleanups + * 18-Jun-2000 RMK Removed virt_to_* and friends definitions + */ + +/** + * @file + * @brief ARM IO access functions + */ + +#ifndef __ASM_ARM_IO_H +#define __ASM_ARM_IO_H + +#define __raw_writeb(v,a) (*(volatile unsigned char *)(a) = (v)) +#define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v)) +#define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v)) + +#define __raw_readb(a) (*(volatile unsigned char *)(a)) +#define __raw_readw(a) (*(volatile unsigned short *)(a)) +#define __raw_readl(a) (*(volatile unsigned int *)(a)) + +#define writeb(v,a) __raw_writeb(v,a) +#define writew(v,a) __raw_writew(v,a) +#define writel(v,a) __raw_writel(v,a) + +#define readb(a) __raw_readb(a) +#define readw(a) __raw_readw(a) +#define readl(a) __raw_readl(a) + +/* for the ARM architecture the string functions are library based */ +extern void writesb(void __iomem*, const void*, int); +extern void writesw(void __iomem*, const void*, int); +extern void writesl(void __iomem*, const void*, int); +extern void readsb(const void __iomem*, void*, int); +extern void readsw(const void __iomem*, void*, int); +extern void readsl(const void __iomem*, void*, int); + +#endif /* __ASM_ARM_IO_H */ |