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Diffstat (limited to 'arch/nios2/include/asm/io.h')
| -rw-r--r-- | arch/nios2/include/asm/io.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h new file mode 100644 index 000000000..121405cd6 --- /dev/null +++ b/arch/nios2/include/asm/io.h @@ -0,0 +1,130 @@ +/* + * (C) Copyright 2004, Psyent Corporation <www.psyent.com> + * Scott McNutt <smcnutt@psyent.com> + * + * 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_NIOS2_IO_H_ +#define __ASM_NIOS2_IO_H_ + +static inline void sync(void) +{ + __asm__ __volatile__ ("sync" : : : "memory"); +} + +/* + * Given a physical address and a length, return a virtual address + * that can be used to access the memory range with the caching + * properties specified by "flags". + */ +#define MAP_NOCACHE (0) +#define MAP_WRCOMBINE (0) +#define MAP_WRBACK (0) +#define MAP_WRTHROUGH (0) + +static inline void * +map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) +{ + return (void *)paddr; +} + +/* + * Take down a mapping set up by map_physmem(). + */ +static inline void unmap_physmem(void *vaddr, unsigned long flags) +{ + +} + +static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + +extern unsigned char inb (unsigned char *port); +extern unsigned short inw (unsigned short *port); +extern unsigned inl (unsigned port); + +#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 readb(addr)\ + ({unsigned char val;\ + asm volatile( "ldbio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;}) +#define readw(addr)\ + ({unsigned short val;\ + asm volatile( "ldhio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;}) +#define readl(addr)\ + ({unsigned long val;\ + asm volatile( "ldwio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;}) + +#define writeb(val,addr)\ + asm volatile ("stbio %0, 0(%1)" : : "r" (val), "r" (addr)) +#define writew(val,addr)\ + asm volatile ("sthio %0, 0(%1)" : : "r" (val), "r" (addr)) +#define writel(val,addr)\ + asm volatile ("stwio %0, 0(%1)" : : "r" (val), "r" (addr)) + +#define inb(addr) readb(addr) +#define inw(addr) readw(addr) +#define inl(addr) readl(addr) +#define outb(val, addr) writeb(val,addr) +#define outw(val, addr) writew(val,addr) +#define outl(val, addr) writel(val,addr) + +static inline void insb (unsigned long port, void *dst, unsigned long count) +{ + unsigned char *p = dst; + while (count--) *p++ = inb (port); +} +static inline void insw (unsigned long port, void *dst, unsigned long count) +{ + unsigned short *p = dst; + while (count--) *p++ = inw (port); +} +static inline void insl (unsigned long port, void *dst, unsigned long count) +{ + unsigned long *p = dst; + while (count--) *p++ = inl (port); +} + +static inline void outsb (unsigned long port, const void *src, unsigned long count) +{ + const unsigned char *p = src; + while (count--) outb (*p++, port); +} + +static inline void outsw (unsigned long port, const void *src, unsigned long count) +{ + const unsigned short *p = src; + while (count--) outw (*p++, port); +} +static inline void outsl (unsigned long port, const void *src, unsigned long count) +{ + const unsigned long *p = src; + while (count--) outl (*p++, port); +} + +#endif /* __ASM_NIOS2_IO_H_ */ |