This source file includes following definitions.
- virt_to_phys
- phys_to_virt
1 #ifndef _ASM_IO_H
2 #define _ASM_IO_H
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28 #ifdef SLOW_IO_BY_JUMPING
29 #define __SLOW_DOWN_IO __asm__ __volatile__("jmp 1f\n1:\tjmp 1f\n1:")
30 #else
31 #define __SLOW_DOWN_IO __asm__ __volatile__("outb %al,$0x80")
32 #endif
33
34 #ifdef REALLY_SLOW_IO
35 #define SLOW_DOWN_IO { __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; }
36 #else
37 #define SLOW_DOWN_IO __SLOW_DOWN_IO
38 #endif
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45
46 extern inline unsigned long virt_to_phys(volatile void * address)
47 {
48 return (unsigned long) address;
49 }
50
51 extern inline void * phys_to_virt(unsigned long address)
52 {
53 return (void *) address;
54 }
55
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58
59 #define virt_to_bus virt_to_phys
60 #define bus_to_virt phys_to_virt
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67
68 #define readb(addr) (*(volatile unsigned char *) (addr))
69 #define readw(addr) (*(volatile unsigned short *) (addr))
70 #define readl(addr) (*(volatile unsigned int *) (addr))
71
72 #define writeb(b,addr) ((*(volatile unsigned char *) (addr)) = (b))
73 #define writew(b,addr) ((*(volatile unsigned short *) (addr)) = (b))
74 #define writel(b,addr) ((*(volatile unsigned int *) (addr)) = (b))
75
76 #define memset_io(a,b,c) memset((void *)(a),(b),(c))
77 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
78 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
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83
84 #define __OUT1(s,x) \
85 extern inline void __out##s(unsigned x value, unsigned short port) {
86
87 #define __OUT2(s,s1,s2) \
88 __asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
89
90 #define __OUT(s,s1,x) \
91 __OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "d" (port)); } \
92 __OUT1(s##c,x) __OUT2(s,s1,"") : : "a" (value), "i" (port)); } \
93 __OUT1(s##_p,x) __OUT2(s,s1,"w") : : "a" (value), "d" (port)); SLOW_DOWN_IO; } \
94 __OUT1(s##c_p,x) __OUT2(s,s1,"") : : "a" (value), "i" (port)); SLOW_DOWN_IO; }
95
96 #define __IN1(s) \
97 extern inline unsigned int __in##s(unsigned short port) { unsigned int _v;
98
99 #define __IN2(s,s1,s2) \
100 __asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
101
102 #define __IN(s,s1,i...) \
103 __IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) ,##i ); return _v; } \
104 __IN1(s##c) __IN2(s,s1,"") : "=a" (_v) : "i" (port) ,##i ); return _v; } \
105 __IN1(s##_p) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) ,##i ); SLOW_DOWN_IO; return _v; } \
106 __IN1(s##c_p) __IN2(s,s1,"") : "=a" (_v) : "i" (port) ,##i ); SLOW_DOWN_IO; return _v; }
107
108 #define __INS(s) \
109 extern inline void ins##s(unsigned short port, void * addr, unsigned long count) \
110 { __asm__ __volatile__ ("cld ; rep ; ins" #s \
111 : "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
112
113 #define __OUTS(s) \
114 extern inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
115 { __asm__ __volatile__ ("cld ; rep ; outs" #s \
116 : "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
117
118 __IN(b,"b","0" (0))
119 __IN(w,"w","0" (0))
120 __IN(l,"")
121
122 __OUT(b,"b",char)
123 __OUT(w,"w",short)
124 __OUT(l,,int)
125
126 __INS(b)
127 __INS(w)
128 __INS(l)
129
130 __OUTS(b)
131 __OUTS(w)
132 __OUTS(l)
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138
139 #define outb(val,port) \
140 ((__builtin_constant_p((port)) && (port) < 256) ? \
141 __outbc((val),(port)) : \
142 __outb((val),(port)))
143
144 #define inb(port) \
145 ((__builtin_constant_p((port)) && (port) < 256) ? \
146 __inbc(port) : \
147 __inb(port))
148
149 #define outb_p(val,port) \
150 ((__builtin_constant_p((port)) && (port) < 256) ? \
151 __outbc_p((val),(port)) : \
152 __outb_p((val),(port)))
153
154 #define inb_p(port) \
155 ((__builtin_constant_p((port)) && (port) < 256) ? \
156 __inbc_p(port) : \
157 __inb_p(port))
158
159 #define outw(val,port) \
160 ((__builtin_constant_p((port)) && (port) < 256) ? \
161 __outwc((val),(port)) : \
162 __outw((val),(port)))
163
164 #define inw(port) \
165 ((__builtin_constant_p((port)) && (port) < 256) ? \
166 __inwc(port) : \
167 __inw(port))
168
169 #define outw_p(val,port) \
170 ((__builtin_constant_p((port)) && (port) < 256) ? \
171 __outwc_p((val),(port)) : \
172 __outw_p((val),(port)))
173
174 #define inw_p(port) \
175 ((__builtin_constant_p((port)) && (port) < 256) ? \
176 __inwc_p(port) : \
177 __inw_p(port))
178
179 #define outl(val,port) \
180 ((__builtin_constant_p((port)) && (port) < 256) ? \
181 __outlc((val),(port)) : \
182 __outl((val),(port)))
183
184 #define inl(port) \
185 ((__builtin_constant_p((port)) && (port) < 256) ? \
186 __inlc(port) : \
187 __inl(port))
188
189 #define outl_p(val,port) \
190 ((__builtin_constant_p((port)) && (port) < 256) ? \
191 __outlc_p((val),(port)) : \
192 __outl_p((val),(port)))
193
194 #define inl_p(port) \
195 ((__builtin_constant_p((port)) && (port) < 256) ? \
196 __inlc_p(port) : \
197 __inl_p(port))
198
199 #endif