arch/arm/mach-s3c2410/include/mach/io.h

   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
  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 /* the following macro is deprecated */
 203 #define ioaddr(port)    __ioaddr((port))
 204
 205 #define insb(p,d,l)     __raw_readsb(__ioaddr(p),d,l)
 206 #define insw(p,d,l)     __raw_readsw(__ioaddr(p),d,l)
 207 #define insl(p,d,l)     __raw_readsl(__ioaddr(p),d,l)
 208
 209 #define outsb(p,d,l)    __raw_writesb(__ioaddr(p),d,l)
 210 #define outsw(p,d,l)    __raw_writesw(__ioaddr(p),d,l)
 211 #define outsl(p,d,l)    __raw_writesl(__ioaddr(p),d,l)
 212
 213 /*
 214  * 1:1 mapping for ioremapped regions.
 215  */
 216 #define __mem_pci(x)    (x)
 217
 218 #endif