1 /*
2 * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
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.
12 *
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.
17 *
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,
21 * MA 02111-1307 USA
22 */
23
24 #ifndef __ASM_NIOS2_IO_H_
25 #define __ASM_NIOS2_IO_H_
26
sync(void)27 static inline void sync(void)
28 {
29 __asm__ __volatile__ ("sync" : : : "memory");
30 }
31
32 /*
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".
36 */
37 #define MAP_NOCACHE (0)
38 #define MAP_WRCOMBINE (0)
39 #define MAP_WRBACK (0)
40 #define MAP_WRTHROUGH (0)
41
42 static inline void *
map_physmem(phys_addr_t paddr,unsigned long len,unsigned long flags)43 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
44 {
45 return (void *)paddr;
46 }
47
48 /*
49 * Take down a mapping set up by map_physmem().
50 */
unmap_physmem(void * vaddr,unsigned long flags)51 static inline void unmap_physmem(void *vaddr, unsigned long flags)
52 {
53
54 }
55
virt_to_phys(void * vaddr)56 static inline phys_addr_t virt_to_phys(void * vaddr)
57 {
58 return (phys_addr_t)(vaddr);
59 }
60
61 extern unsigned char inb (unsigned char *port);
62 extern unsigned short inw (unsigned short *port);
63 extern unsigned inl (unsigned port);
64
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))
68
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))
72
73 #define readb(addr)\
74 ({unsigned char val;\
75 asm volatile( "ldbio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
76 #define readw(addr)\
77 ({unsigned short val;\
78 asm volatile( "ldhio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
79 #define readl(addr)\
80 ({unsigned long val;\
81 asm volatile( "ldwio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
82
83 #define writeb(val,addr)\
84 asm volatile ("stbio %0, 0(%1)" : : "r" (val), "r" (addr))
85 #define writew(val,addr)\
86 asm volatile ("sthio %0, 0(%1)" : : "r" (val), "r" (addr))
87 #define writel(val,addr)\
88 asm volatile ("stwio %0, 0(%1)" : : "r" (val), "r" (addr))
89
90 #define inb(addr) readb(addr)
91 #define inw(addr) readw(addr)
92 #define inl(addr) readl(addr)
93 #define outb(val, addr) writeb(val,addr)
94 #define outw(val, addr) writew(val,addr)
95 #define outl(val, addr) writel(val,addr)
96
insb(unsigned long port,void * dst,unsigned long count)97 static inline void insb (unsigned long port, void *dst, unsigned long count)
98 {
99 unsigned char *p = dst;
100 while (count--) *p++ = inb (port);
101 }
insw(unsigned long port,void * dst,unsigned long count)102 static inline void insw (unsigned long port, void *dst, unsigned long count)
103 {
104 unsigned short *p = dst;
105 while (count--) *p++ = inw (port);
106 }
insl(unsigned long port,void * dst,unsigned long count)107 static inline void insl (unsigned long port, void *dst, unsigned long count)
108 {
109 unsigned long *p = dst;
110 while (count--) *p++ = inl (port);
111 }
112
outsb(unsigned long port,const void * src,unsigned long count)113 static inline void outsb (unsigned long port, const void *src, unsigned long count)
114 {
115 const unsigned char *p = src;
116 while (count--) outb (*p++, port);
117 }
118
outsw(unsigned long port,const void * src,unsigned long count)119 static inline void outsw (unsigned long port, const void *src, unsigned long count)
120 {
121 const unsigned short *p = src;
122 while (count--) outw (*p++, port);
123 }
outsl(unsigned long port,const void * src,unsigned long count)124 static inline void outsl (unsigned long port, const void *src, unsigned long count)
125 {
126 const unsigned long *p = src;
127 while (count--) outl (*p++, port);
128 }
129
130 #endif /* __ASM_NIOS2_IO_H_ */
131