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

   1 /*
   2  * linux/include/asm-arm/arch-s3c2410/io.h
   3  *  from linux/include/asm-arm/arch-rpc/io.h
   4  *
   5  * Copyright (C) 1997 Russell King
   6  *           (C) 2003 Simtec Electronics
   7  *
   8  * Modifications:
   9  *  06-Dec-1997 RMK     Created.
  10  *  02-Sep-2003 BJD     Modified for S3C2410
  11  *
  12  */
  13
  14 #ifndef __ASM_ARM_ARCH_IO_H
  15 #define __ASM_ARM_ARCH_IO_H
  16
  17 #define IO_SPACE_LIMIT 0xffffffff
  18
  19 /*
  20  * We use two different types of addressing - PC style addresses, and ARM
  21  * addresses.  PC style accesses the PC hardware with the normal PC IO
  22  * addresses, eg 0x3f8 for serial#1.  ARM addresses are above A28
  23  * and are translated to the start of IO.  Note that all addresses are
  24  * not shifted left!
  25  */
  26
  27 #define __PORT_PCIO(x)  ((x) < (1<<28))
  28
  29 #define PCIO_BASE        (S3C2410_VA_ISA_WORD)
  30 #define PCIO_BASE_b      (S3C2410_VA_ISA_BYTE)
  31 #define PCIO_BASE_w      (S3C2410_VA_ISA_WORD)
  32 #define PCIO_BASE_l      (S3C2410_VA_ISA_WORD)
  33 /*
  34  * Dynamic IO functions - let the compiler
  35  * optimize the expressions
  36  */
  37
  38 #define DECLARE_DYN_OUT(sz,fnsuffix,instr) \
  39 static inline void __out##fnsuffix (unsigned int val, unsigned int port) \
  40 { \
  41         unsigned long temp;                                   \
  42         __asm__ __volatile__(                                 \
  43         "cmp    %2, #(1<<28)\n\t"                             \
  44         "mov    %0, %2\n\t"                                   \
  45         "addcc  %0, %0, %3\n\t"                               \
  46         "str" instr " %1, [%0, #0 ]     @ out" #fnsuffix      \
  47         : "=&r" (temp)                                        \
  48         : "r" (val), "r" (port), "Ir" (PCIO_BASE_##fnsuffix)  \
  49         : "cc");                                              \
  50 }
  51
  52
  53 #define DECLARE_DYN_IN(sz,fnsuffix,instr)                               \
  54 static inline unsigned sz __in##fnsuffix (unsigned int port)            \
  55 {                                                                       \
  56         unsigned long temp, value;                                      \
  57         __asm__ __volatile__(                                           \
  58         "cmp    %2, #(1<<28)\n\t"                                       \
  59         "mov    %0, %2\n\t"                                             \
  60         "addcc  %0, %0, %3\n\t"                                         \
  61         "ldr" instr "   %1, [%0, #0 ]   @ in" #fnsuffix         \
  62         : "=&r" (temp), "=r" (value)                                    \
  63         : "r" (port), "Ir" (PCIO_BASE_##fnsuffix)       \
  64         : "cc");                                                        \
  65         return (unsigned sz)value;                                      \
  66 }
  67
  68 static inline void __iomem *__ioaddr (unsigned int port)
  69 {
  70         return (void __iomem *)(__PORT_PCIO(port) ? PCIO_BASE + port : port);
  71 }
  72
  73 #define DECLARE_IO(sz,fnsuffix,instr)   \
  74         DECLARE_DYN_IN(sz,fnsuffix,instr) \
  75         DECLARE_DYN_OUT(sz,fnsuffix,instr)
  76
  77 DECLARE_IO(char,b,"b")
  78 DECLARE_IO(short,w,"h")
  79 DECLARE_IO(int,l,"")
  80
  81 #undef DECLARE_IO
  82 #undef DECLARE_DYN_IN
  83
  84 /*
  85  * Constant address IO functions
  86  *
  87  * These have to be macros for the 'J' constraint to work -
  88  * +/-4096 immediate operand.
  89  */
  90 #define __outbc(value,port)                                             \
  91 ({                                                                      \
  92         if (__PORT_PCIO((port)))                                        \
  93                 __asm__ __volatile__(                                   \
  94                 "strb   %0, [%1, %2]    @ outbc"                        \
  95                 : : "r" (value), "r" (PCIO_BASE), "Jr" ((port)));       \
  96         else                                                            \
  97                 __asm__ __volatile__(                                   \
  98                 "strb   %0, [%1, #0]    @ outbc"                        \
  99                 : : "r" (value), "r" ((port)));         \
 100 })
 101
 102 #define __inbc(port)                                                    \
 103 ({                                                                      \
 104         unsigned char result;                                           \
 105         if (__PORT_PCIO((port)))                                        \
 106                 __asm__ __volatile__(                                   \
 107                 "ldrb   %0, [%1, %2]    @ inbc"                         \
 108                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port)));      \
 109         else                                                            \
 110                 __asm__ __volatile__(                                   \
 111                 "ldrb   %0, [%1, #0]    @ inbc"                         \
 112                 : "=r" (result) : "r" ((port)));        \
 113         result;                                                         \
 114 })
 115
 116 #define __outwc(value,port)                                             \
 117 ({                                                                      \
 118         unsigned long v = value;                                        \
 119         if (__PORT_PCIO((port)))                                        \
 120                 __asm__ __volatile__(                                   \
 121                 "strh   %0, [%1, %2]    @ outwc"                        \
 122                 : : "r" (v), "r" (PCIO_BASE), "Jr" ((port)));   \
 123         else                                                            \
 124                 __asm__ __volatile__(                                   \
 125                 "strh   %0, [%1, #0]    @ outwc"                        \
 126                 : : "r" (v), "r" ((port)));     \
 127 })
 128
 129 #define __inwc(port)                                                    \
 130 ({                                                                      \
 131         unsigned short result;                                          \
 132         if (__PORT_PCIO((port)))                                        \
 133                 __asm__ __volatile__(                                   \
 134                 "ldrh   %0, [%1, %2]    @ inwc"                         \
 135                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port)));      \
 136         else                                                            \
 137                 __asm__ __volatile__(                                   \
 138                 "ldrh   %0, [%1, #0]    @ inwc"                         \
 139                 : "=r" (result) : "r" ((port)));                \
 140         result;                                         \
 141 })
 142
 143 #define __outlc(value,port)                                             \
 144 ({                                                                      \
 145         unsigned long v = value;                                        \
 146         if (__PORT_PCIO((port)))                                        \
 147                 __asm__ __volatile__(                                   \
 148                 "str    %0, [%1, %2]    @ outlc"                        \
 149                 : : "r" (v), "r" (PCIO_BASE), "Jr" ((port)));   \
 150         else                                                            \
 151                 __asm__ __volatile__(                                   \
 152                 "str    %0, [%1, #0]    @ outlc"                        \
 153                 : : "r" (v), "r" ((port)));             \
 154 })
 155
 156 #define __inlc(port)                                                    \
 157 ({                                                                      \
 158         unsigned long result;                                           \
 159         if (__PORT_PCIO((port)))                                        \
 160                 __asm__ __volatile__(                                   \
 161                 "ldr    %0, [%1, %2]    @ inlc"                         \
 162                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port)));      \
 163         else                                                            \
 164                 __asm__ __volatile__(                                   \
 165                 "ldr    %0, [%1, #0]    @ inlc"                         \
 166                 : "=r" (result) : "r" ((port)));                \
 167         result;                                                         \
 168 })
 169
 170 #define __ioaddrc(port) ((void __iomem *)(__PORT_PCIO(port) ? PCIO_BASE + (port) : (port)))
 171
 172 #define inb(p)          (__builtin_constant_p((p)) ? __inbc(p)     : __inb(p))
 173 #define inw(p)          (__builtin_constant_p((p)) ? __inwc(p)     : __inw(p))
 174 #define inl(p)          (__builtin_constant_p((p)) ? __inlc(p)     : __inl(p))
 175 #define outb(v,p)       (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p))
 176 #define outw(v,p)       (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p))
 177 #define outl(v,p)       (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p))
 178 #define __ioaddr(p)     (__builtin_constant_p((p)) ? __ioaddr(p)  : __ioaddrc(p))
 179 /* the following macro is deprecated */
 180 #define ioaddr(port)                    __ioaddr((port))
 181
 182 #define insb(p,d,l)     __raw_readsb(__ioaddr(p),d,l)
 183 #define insw(p,d,l)     __raw_readsw(__ioaddr(p),d,l)
 184 #define insl(p,d,l)     __raw_readsl(__ioaddr(p),d,l)
 185
 186 #define outsb(p,d,l)    __raw_writesb(__ioaddr(p),d,l)
 187 #define outsw(p,d,l)    __raw_writesw(__ioaddr(p),d,l)
 188 #define outsl(p,d,l)    __raw_writesl(__ioaddr(p),d,l)
 189
 190 /*
 191  * 1:1 mapping for ioremapped regions.
 192  */
 193 #define __mem_pci(x)    (x)
 194
 195 #endif