2 * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #ifndef __ASM_NIOS2_IO_H_
25 #define __ASM_NIOS2_IO_H_
27 static inline void sync(void)
29 __asm__ __volatile__ ("sync" : : : "memory");
33 * Given a physical address and a length, return a virtual address
34 * that can be used to access the memory range with the caching
35 * properties specified by "flags".
37 #define MAP_NOCACHE (0)
38 #define MAP_WRCOMBINE (0)
39 #define MAP_WRBACK (0)
40 #define MAP_WRTHROUGH (0)
43 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
49 * Take down a mapping set up by map_physmem().
51 static inline void unmap_physmem(void *vaddr, unsigned long flags)
56 static inline phys_addr_t virt_to_phys(void * vaddr)
58 return (phys_addr_t)(vaddr);
61 extern unsigned char inb (unsigned char *port);
62 extern unsigned short inw (unsigned short *port);
63 extern unsigned inl (unsigned port);
65 #define __raw_writeb(v,a) (*(volatile unsigned char *)(a) = (v))
66 #define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v))
67 #define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v))
69 #define __raw_readb(a) (*(volatile unsigned char *)(a))
70 #define __raw_readw(a) (*(volatile unsigned short *)(a))
71 #define __raw_readl(a) (*(volatile unsigned int *)(a))
75 asm volatile( "ldbio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
77 ({unsigned short val;\
78 asm volatile( "ldhio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
81 asm volatile( "ldwio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
83 #define writeb(addr,val)\
84 asm volatile ("stbio %1, 0(%0)" : : "r" (addr), "r" (val))
85 #define writew(addr,val)\
86 asm volatile ("sthio %1, 0(%0)" : : "r" (addr), "r" (val))
87 #define writel(addr,val)\
88 asm volatile ("stwio %1, 0(%0)" : : "r" (addr), "r" (val))
90 #define inb(addr) readb(addr)
91 #define inw(addr) readw(addr)
92 #define inl(addr) readl(addr)
93 #define outb(addr,val) writeb(addr,val)
94 #define outw(addr,val) writew(addr,val)
95 #define outl(addr,val) writel(addr,val)
97 static inline void insb (unsigned long port, void *dst, unsigned long count)
99 unsigned char *p = dst;
100 while (count--) *p++ = inb (port);
102 static inline void insw (unsigned long port, void *dst, unsigned long count)
104 unsigned short *p = dst;
105 while (count--) *p++ = inw (port);
107 static inline void insl (unsigned long port, void *dst, unsigned long count)
109 unsigned long *p = dst;
110 while (count--) *p++ = inl (port);
113 static inline void outsb (unsigned long port, const void *src, unsigned long count)
115 const unsigned char *p = src;
116 while (count--) outb (*p++, port);
119 static inline void outsw (unsigned long port, const void *src, unsigned long count)
121 const unsigned short *p = src;
122 while (count--) outw (*p++, port);
124 static inline void outsl (unsigned long port, const void *src, unsigned long count)
126 const unsigned long *p = src;
127 while (count--) outl (*p++, port);
130 #endif /* __ASM_NIOS2_IO_H_ */