arch/arm/mach-rpc/include/mach/io.h

   1 /*
   2  *  arch/arm/mach-rpc/include/mach/io.h
   3  *
   4  *  Copyright (C) 1997 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Modifications:
  11  *  06-Dec-1997 RMK     Created.
  12  */
  13 #ifndef __ASM_ARM_ARCH_IO_H
  14 #define __ASM_ARM_ARCH_IO_H
  15
  16 #include <mach/hardware.h>
  17
  18 #define IO_SPACE_LIMIT 0xffffffff
  19
  20 /*
  21  * We use two different types of addressing - PC style addresses, and ARM
  22  * addresses.  PC style accesses the PC hardware with the normal PC IO
  23  * addresses, eg 0x3f8 for serial#1.  ARM addresses are 0x80000000+
  24  * and are translated to the start of IO.  Note that all addresses are
  25  * shifted left!
  26  */
  27 #define __PORT_PCIO(x)  (!((x) & 0x80000000))
  28
  29 /*
  30  * Dynamic IO functions.
  31  */
  32 static inline void __outb (unsigned int value, unsigned int port)
  33 {
  34         unsigned long temp;
  35         __asm__ __volatile__(
  36         "tst    %2, #0x80000000\n\t"
  37         "mov    %0, %4\n\t"
  38         "addeq  %0, %0, %3\n\t"
  39         "strb   %1, [%0, %2, lsl #2]    @ outb"
  40         : "=&r" (temp)
  41         : "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
  42         : "cc");
  43 }
  44
  45 static inline void __outw (unsigned int value, unsigned int port)
  46 {
  47         unsigned long temp;
  48         __asm__ __volatile__(
  49         "tst    %2, #0x80000000\n\t"
  50         "mov    %0, %4\n\t"
  51         "addeq  %0, %0, %3\n\t"
  52         "str    %1, [%0, %2, lsl #2]    @ outw"
  53         : "=&r" (temp)
  54         : "r" (value|value<<16), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
  55         : "cc");
  56 }
  57
  58 static inline void __outl (unsigned int value, unsigned int port)
  59 {
  60         unsigned long temp;
  61         __asm__ __volatile__(
  62         "tst    %2, #0x80000000\n\t"
  63         "mov    %0, %4\n\t"
  64         "addeq  %0, %0, %3\n\t"
  65         "str    %1, [%0, %2, lsl #2]    @ outl"
  66         : "=&r" (temp)
  67         : "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
  68         : "cc");
  69 }
  70
  71 #define DECLARE_DYN_IN(sz,fnsuffix,instr)                                       \
  72 static inline unsigned sz __in##fnsuffix (unsigned int port)            \
  73 {                                                                               \
  74         unsigned long temp, value;                                              \
  75         __asm__ __volatile__(                                                   \
  76         "tst    %2, #0x80000000\n\t"                                            \
  77         "mov    %0, %4\n\t"                                                     \
  78         "addeq  %0, %0, %3\n\t"                                                 \
  79         "ldr" instr "   %1, [%0, %2, lsl #2]    @ in" #fnsuffix                 \
  80         : "=&r" (temp), "=r" (value)                                            \
  81         : "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)                \
  82         : "cc");                                                                \
  83         return (unsigned sz)value;                                              \
  84 }
  85
  86 static inline void __iomem *__deprecated __ioaddr(unsigned int port)
  87 {
  88         void __iomem *ret;
  89         if (__PORT_PCIO(port))
  90                 ret = PCIO_BASE;
  91         else
  92                 ret = IO_BASE;
  93         return ret + (port << 2);
  94 }
  95
  96 #define DECLARE_IO(sz,fnsuffix,instr)   \
  97         DECLARE_DYN_IN(sz,fnsuffix,instr)
  98
  99 DECLARE_IO(char,b,"b")
 100 DECLARE_IO(short,w,"")
 101 DECLARE_IO(int,l,"")
 102
 103 #undef DECLARE_IO
 104 #undef DECLARE_DYN_IN
 105
 106 /*
 107  * Constant address IO functions
 108  *
 109  * These have to be macros for the 'J' constraint to work -
 110  * +/-4096 immediate operand.
 111  */
 112 #define __outbc(value,port)                                                     \
 113 ({                                                                              \
 114         if (__PORT_PCIO((port)))                                                \
 115                 __asm__ __volatile__(                                           \
 116                 "strb   %0, [%1, %2]    @ outbc"                                \
 117                 : : "r" (value), "r" (PCIO_BASE), "Jr" ((port) << 2));          \
 118         else                                                                    \
 119                 __asm__ __volatile__(                                           \
 120                 "strb   %0, [%1, %2]    @ outbc"                                \
 121                 : : "r" (value), "r" (IO_BASE), "r" ((port) << 2));             \
 122 })
 123
 124 #define __inbc(port)                                                            \
 125 ({                                                                              \
 126         unsigned char result;                                                   \
 127         if (__PORT_PCIO((port)))                                                \
 128                 __asm__ __volatile__(                                           \
 129                 "ldrb   %0, [%1, %2]    @ inbc"                                 \
 130                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2));         \
 131         else                                                                    \
 132                 __asm__ __volatile__(                                           \
 133                 "ldrb   %0, [%1, %2]    @ inbc"                                 \
 134                 : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2));            \
 135         result;                                                                 \
 136 })
 137
 138 #define __outwc(value,port)                                                     \
 139 ({                                                                              \
 140         unsigned long __v = value;                                              \
 141         if (__PORT_PCIO((port)))                                                \
 142                 __asm__ __volatile__(                                           \
 143                 "str    %0, [%1, %2]    @ outwc"                                \
 144                 : : "r" (__v|__v<<16), "r" (PCIO_BASE), "Jr" ((port) << 2));    \
 145         else                                                                    \
 146                 __asm__ __volatile__(                                           \
 147                 "str    %0, [%1, %2]    @ outwc"                                \
 148                 : : "r" (__v|__v<<16), "r" (IO_BASE), "r" ((port) << 2));               \
 149 })
 150
 151 #define __inwc(port)                                                            \
 152 ({                                                                              \
 153         unsigned short result;                                                  \
 154         if (__PORT_PCIO((port)))                                                \
 155                 __asm__ __volatile__(                                           \
 156                 "ldr    %0, [%1, %2]    @ inwc"                                 \
 157                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2));         \
 158         else                                                                    \
 159                 __asm__ __volatile__(                                           \
 160                 "ldr    %0, [%1, %2]    @ inwc"                                 \
 161                 : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2));            \
 162         result & 0xffff;                                                        \
 163 })
 164
 165 #define __outlc(value,port)                                                     \
 166 ({                                                                              \
 167         unsigned long __v = value;                                              \
 168         if (__PORT_PCIO((port)))                                                \
 169                 __asm__ __volatile__(                                           \
 170                 "str    %0, [%1, %2]    @ outlc"                                \
 171                 : : "r" (__v), "r" (PCIO_BASE), "Jr" ((port) << 2));            \
 172         else                                                                    \
 173                 __asm__ __volatile__(                                           \
 174                 "str    %0, [%1, %2]    @ outlc"                                \
 175                 : : "r" (__v), "r" (IO_BASE), "r" ((port) << 2));               \
 176 })
 177
 178 #define __inlc(port)                                                            \
 179 ({                                                                              \
 180         unsigned long result;                                                   \
 181         if (__PORT_PCIO((port)))                                                \
 182                 __asm__ __volatile__(                                           \
 183                 "ldr    %0, [%1, %2]    @ inlc"                                 \
 184                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2));         \
 185         else                                                                    \
 186                 __asm__ __volatile__(                                           \
 187                 "ldr    %0, [%1, %2]    @ inlc"                                 \
 188                 : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2));            \
 189         result;                                                                 \
 190 })
 191
 192 #define inb(p)          (__builtin_constant_p((p)) ? __inbc(p)    : __inb(p))
 193 #define inw(p)          (__builtin_constant_p((p)) ? __inwc(p)    : __inw(p))
 194 #define inl(p)          (__builtin_constant_p((p)) ? __inlc(p)    : __inl(p))
 195 #define outb(v,p)       (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p))
 196 #define outw(v,p)       (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p))
 197 #define outl(v,p)       (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p))
 198
 199 /* the following macro is deprecated */
 200 #define ioaddr(port)    ((unsigned long)__ioaddr((port)))
 201
 202 #define insb(p,d,l)     __raw_readsb(__ioaddr(p),d,l)
 203 #define insw(p,d,l)     __raw_readsw(__ioaddr(p),d,l)
 204
 205 #define outsb(p,d,l)    __raw_writesb(__ioaddr(p),d,l)
 206 #define outsw(p,d,l)    __raw_writesw(__ioaddr(p),d,l)
 207
 208 /*
 209  * 1:1 mapping for ioremapped regions.
 210  */
 211 #define __mem_pci(x)    (x)
 212
 213 #endif