1 /*
2 * arch/arm/mach-s3c2410/include/mach/io.h
3 * from arch/arm/mach-rpc/include/mach/io.h
4 *
5 * Copyright (C) 1997 Russell King
6 * (C) 2003 Simtec Electronics
7 */
8
9 #ifndef __ASM_ARM_ARCH_IO_H
10 #define __ASM_ARM_ARCH_IO_H
11
12 #include <mach/hardware.h>
13
14 #define IO_SPACE_LIMIT 0xffffffff
15
16 /*
17 * We use two different types of addressing - PC style addresses, and ARM
18 * addresses. PC style accesses the PC hardware with the normal PC IO
19 * addresses, eg 0x3f8 for serial#1. ARM addresses are above A28
20 * and are translated to the start of IO. Note that all addresses are
21 * not shifted left!
22 */
23
24 #define __PORT_PCIO(x) ((x) < (1<<28))
25
26 #define PCIO_BASE (S3C24XX_VA_ISA_WORD)
27 #define PCIO_BASE_b (S3C24XX_VA_ISA_BYTE)
28 #define PCIO_BASE_w (S3C24XX_VA_ISA_WORD)
29 #define PCIO_BASE_l (S3C24XX_VA_ISA_WORD)
30 /*
31 * Dynamic IO functions - let the compiler
32 * optimize the expressions
33 */
34
35 #define DECLARE_DYN_OUT(sz,fnsuffix,instr) \
36 static inline void __out##fnsuffix (unsigned int val, unsigned int port) \
37 { \
38 unsigned long temp; \
39 __asm__ __volatile__( \
40 "cmp %2, #(1<<28)\n\t" \
41 "mov %0, %2\n\t" \
42 "addcc %0, %0, %3\n\t" \
43 "str" instr " %1, [%0, #0 ] @ out" #fnsuffix \
44 : "=&r" (temp) \
45 : "r" (val), "r" (port), "Ir" (PCIO_BASE_##fnsuffix) \
46 : "cc"); \
47 }
48
49
50 #define DECLARE_DYN_IN(sz,fnsuffix,instr) \
51 static inline unsigned sz __in##fnsuffix (unsigned int port) \
52 { \
53 unsigned long temp, value; \
54 __asm__ __volatile__( \
55 "cmp %2, #(1<<28)\n\t" \
56 "mov %0, %2\n\t" \
57 "addcc %0, %0, %3\n\t" \
58 "ldr" instr " %1, [%0, #0 ] @ in" #fnsuffix \
59 : "=&r" (temp), "=r" (value) \
60 : "r" (port), "Ir" (PCIO_BASE_##fnsuffix) \
61 : "cc"); \
62 return (unsigned sz)value; \
63 }
64
__ioaddr(unsigned long port)65 static inline void __iomem *__ioaddr (unsigned long port)
66 {
67 return __PORT_PCIO(port) ? (PCIO_BASE + port) : (void __iomem *)port;
68 }
69
70 #define DECLARE_IO(sz,fnsuffix,instr) \
71 DECLARE_DYN_IN(sz,fnsuffix,instr) \
72 DECLARE_DYN_OUT(sz,fnsuffix,instr)
73
74 DECLARE_IO(char,b,"b")
75 DECLARE_IO(short,w,"h")
76 DECLARE_IO(int,l,"")
77
78 #undef DECLARE_IO
79 #undef DECLARE_DYN_IN
80
81 /*
82 * Constant address IO functions
83 *
84 * These have to be macros for the 'J' constraint to work -
85 * +/-4096 immediate operand.
86 */
87 #define __outbc(value,port) \
88 ({ \
89 if (__PORT_PCIO((port))) \
90 __asm__ __volatile__( \
91 "strb %0, [%1, %2] @ outbc" \
92 : : "r" (value), "r" (PCIO_BASE), "Jr" ((port))); \
93 else \
94 __asm__ __volatile__( \
95 "strb %0, [%1, #0] @ outbc" \
96 : : "r" (value), "r" ((port))); \
97 })
98
99 #define __inbc(port) \
100 ({ \
101 unsigned char result; \
102 if (__PORT_PCIO((port))) \
103 __asm__ __volatile__( \
104 "ldrb %0, [%1, %2] @ inbc" \
105 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port))); \
106 else \
107 __asm__ __volatile__( \
108 "ldrb %0, [%1, #0] @ inbc" \
109 : "=r" (result) : "r" ((port))); \
110 result; \
111 })
112
113 #define __outwc(value,port) \
114 ({ \
115 unsigned long v = value; \
116 if (__PORT_PCIO((port))) { \
117 if ((port) < 256 && (port) > -256) \
118 __asm__ __volatile__( \
119 "strh %0, [%1, %2] @ outwc" \
120 : : "r" (v), "r" (PCIO_BASE), "Jr" ((port))); \
121 else if ((port) > 0) \
122 __asm__ __volatile__( \
123 "strh %0, [%1, %2] @ outwc" \
124 : : "r" (v), \
125 "r" (PCIO_BASE + ((port) & ~0xff)), \
126 "Jr" (((port) & 0xff))); \
127 else \
128 __asm__ __volatile__( \
129 "strh %0, [%1, #0] @ outwc" \
130 : : "r" (v), \
131 "r" (PCIO_BASE + (port))); \
132 } else \
133 __asm__ __volatile__( \
134 "strh %0, [%1, #0] @ outwc" \
135 : : "r" (v), "r" ((port))); \
136 })
137
138 #define __inwc(port) \
139 ({ \
140 unsigned short result; \
141 if (__PORT_PCIO((port))) { \
142 if ((port) < 256 && (port) > -256 ) \
143 __asm__ __volatile__( \
144 "ldrh %0, [%1, %2] @ inwc" \
145 : "=r" (result) \
146 : "r" (PCIO_BASE), \
147 "Jr" ((port))); \
148 else if ((port) > 0) \
149 __asm__ __volatile__( \
150 "ldrh %0, [%1, %2] @ inwc" \
151 : "=r" (result) \
152 : "r" (PCIO_BASE + ((port) & ~0xff)), \
153 "Jr" (((port) & 0xff))); \
154 else \
155 __asm__ __volatile__( \
156 "ldrh %0, [%1, #0] @ inwc" \
157 : "=r" (result) \
158 : "r" (PCIO_BASE + ((port)))); \
159 } else \
160 __asm__ __volatile__( \
161 "ldrh %0, [%1, #0] @ inwc" \
162 : "=r" (result) : "r" ((port))); \
163 result; \
164 })
165
166 #define __outlc(value,port) \
167 ({ \
168 unsigned long v = value; \
169 if (__PORT_PCIO((port))) \
170 __asm__ __volatile__( \
171 "str %0, [%1, %2] @ outlc" \
172 : : "r" (v), "r" (PCIO_BASE), "Jr" ((port))); \
173 else \
174 __asm__ __volatile__( \
175 "str %0, [%1, #0] @ outlc" \
176 : : "r" (v), "r" ((port))); \
177 })
178
179 #define __inlc(port) \
180 ({ \
181 unsigned long result; \
182 if (__PORT_PCIO((port))) \
183 __asm__ __volatile__( \
184 "ldr %0, [%1, %2] @ inlc" \
185 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port))); \
186 else \
187 __asm__ __volatile__( \
188 "ldr %0, [%1, #0] @ inlc" \
189 : "=r" (result) : "r" ((port))); \
190 result; \
191 })
192
193 #define __ioaddrc(port) ((__PORT_PCIO(port) ? PCIO_BASE + (port) : (void __iomem *)(port)))
194
195 #define inb(p) (__builtin_constant_p((p)) ? __inbc(p) : __inb(p))
196 #define inw(p) (__builtin_constant_p((p)) ? __inwc(p) : __inw(p))
197 #define inl(p) (__builtin_constant_p((p)) ? __inlc(p) : __inl(p))
198 #define outb(v,p) (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p))
199 #define outw(v,p) (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p))
200 #define outl(v,p) (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p))
201 #define __ioaddr(p) (__builtin_constant_p((p)) ? __ioaddr(p) : __ioaddrc(p))
202
203 #define insb(p,d,l) __raw_readsb(__ioaddr(p),d,l)
204 #define insw(p,d,l) __raw_readsw(__ioaddr(p),d,l)
205 #define insl(p,d,l) __raw_readsl(__ioaddr(p),d,l)
206
207 #define outsb(p,d,l) __raw_writesb(__ioaddr(p),d,l)
208 #define outsw(p,d,l) __raw_writesw(__ioaddr(p),d,l)
209 #define outsl(p,d,l) __raw_writesl(__ioaddr(p),d,l)
210
211 /*
212 * 1:1 mapping for ioremapped regions.
213 */
214 #define __mem_pci(x) (x)
215
216 #endif
217