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Diffstat (limited to 'include/asm-avr32/io.h')
| -rw-r--r-- | include/asm-avr32/io.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/include/asm-avr32/io.h b/include/asm-avr32/io.h new file mode 100644 index 0000000..e86c456 --- /dev/null +++ b/include/asm-avr32/io.h @@ -0,0 +1,92 @@ +/* + * Copyright (C) 2006 Atmel Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#ifndef __ASM_AVR32_IO_H +#define __ASM_AVR32_IO_H + +#ifdef __KERNEL__ + +/* + * Generic IO read/write. These perform native-endian accesses. Note + * that some architectures will want to re-define __raw_{read,write}w. + */ +extern void __raw_writesb(unsigned int addr, const void *data, int bytelen); +extern void __raw_writesw(unsigned int addr, const void *data, int wordlen); +extern void __raw_writesl(unsigned int addr, const void *data, int longlen); + +extern void __raw_readsb(unsigned int addr, void *data, int bytelen); +extern void __raw_readsw(unsigned int addr, void *data, int wordlen); +extern void __raw_readsl(unsigned int addr, void *data, int longlen); + +#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)) + +/* As long as I/O is only performed in P4 (or possibly P3), we're safe */ +#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) + +/* + * Bad read/write accesses... + */ +extern void __readwrite_bug(const char *fn); + +#define IO_SPACE_LIMIT 0xffffffff + +/* + * All I/O is memory mapped, so these macros doesn't make very much sense + */ +#define outb(v,p) __raw_writeb(v, p) +#define outw(v,p) __raw_writew(cpu_to_le16(v),p) +#define outl(v,p) __raw_writel(cpu_to_le32(v),p) + +#define inb(p) ({ unsigned int __v = __raw_readb(p); __v; }) +#define inw(p) ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; }) +#define inl(p) ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; }) + +#include <asm/addrspace.h> + +/* virt_to_phys will only work when address is in P1 or P2 */ +static __inline__ unsigned long virt_to_phys(volatile void *address) +{ + return PHYSADDR(address); +} + +static __inline__ void * phys_to_virt(unsigned long address) +{ + return (void *)P1SEGADDR(address); +} + +#define cached(addr) ((void *)P1SEGADDR(addr)) +#define uncached(addr) ((void *)P2SEGADDR(addr)) + +#endif /* __KERNEL__ */ + +#endif /* __ASM_AVR32_IO_H */ |