diff options
Diffstat (limited to 'arch/nios/include/asm/io.h')
| -rw-r--r-- | arch/nios/include/asm/io.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/arch/nios/include/asm/io.h b/arch/nios/include/asm/io.h new file mode 100644 index 000000000..899682cc4 --- /dev/null +++ b/arch/nios/include/asm/io.h @@ -0,0 +1,141 @@ +/* + * (C) Copyright 2003, 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_NIOS_IO_H_ +#define __ASM_NIOS_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 readb(addr)\ + ({unsigned char val;\ + asm volatile( " pfxio 0 \n"\ + " ld %0, [%1] \n"\ + " ext8d %0, %1 \n"\ + :"=r"(val) : "r" (addr)); val;}) + +#define readw(addr)\ + ({unsigned short val;\ + asm volatile( " pfxio 0 \n"\ + " ld %0, [%1] \n"\ + " ext16d %0, %1 \n"\ + :"=r"(val) : "r" (addr)); val;}) + +#define readl(addr)\ + ({unsigned long val;\ + asm volatile( " pfxio 0 \n"\ + " ld %0, [%1] \n"\ + :"=r"(val) : "r" (addr)); val;}) + +#define writeb(addr,val)\ + asm volatile ( " fill8 %%r0, %1 \n"\ + " st8d [%0], %%r0 \n"\ + : : "r" (addr), "r" (val) : "r0") + +#define writew(addr,val)\ + asm volatile ( " fill16 %%r0, %1 \n"\ + " st16d [%0], %%r0 \n"\ + : : "r" (addr), "r" (val) : "r0") + +#define writel(addr,val)\ + asm volatile ( " st [%0], %1 \n"\ + : : "r" (addr), "r" (val)) + +#define inb(addr) readb(addr) +#define inw(addr) readw(addr) +#define inl(addr) readl(addr) +#define outb(val,addr) writeb(addr,val) +#define outw(val,addr) writew(addr,val) +#define outl(val,addr) writel(addr,val) + +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); +} + +static inline void sync(void) +{ +} + +/* + * 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); +} + +#endif /* __ASM_NIOS_IO_H_ */ |