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

   1 /*
   2  * linux/include/asm-arm/arch-shark/io.h
   3  *
   4  * by Alexander Schulz
   5  *
   6  * derived from:
   7  * linux/include/asm-arm/arch-ebsa110/io.h
   8  * Copyright (C) 1997,1998 Russell King
   9  */
  10
  11 #ifndef __ASM_ARM_ARCH_IO_H
  12 #define __ASM_ARM_ARCH_IO_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 0x80000000+
  20  * and are translated to the start of IO.
  21  */
  22 #define __PORT_PCIO(x)  (!((x) & 0x80000000))
  23
  24 /*
  25  * Dynamic IO functions - let the compiler
  26  * optimize the expressions
  27  */
  28 #define DECLARE_DYN_OUT(fnsuffix,instr)                                         \
  29 static inline void __out##fnsuffix (unsigned int value, unsigned int port)      \
  30 {                                                                               \
  31         unsigned long temp;                                                     \
  32         __asm__ __volatile__(                                                   \
  33         "tst    %2, #0x80000000\n\t"                                            \
  34         "mov    %0, %4\n\t"                                                     \
  35         "addeq  %0, %0, %3\n\t"                                                 \
  36         "str" instr "   %1, [%0, %2]    @ out" #fnsuffix                        \
  37         : "=&r" (temp)                                                          \
  38         : "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)   \
  39         : "cc");                                                                \
  40 }
  41
  42 #define DECLARE_DYN_IN(sz,fnsuffix,instr)                                       \
  43 static inline unsigned sz __in##fnsuffix (unsigned int port)            \
  44 {                                                                               \
  45         unsigned long temp, value;                                              \
  46         __asm__ __volatile__(                                                   \
  47         "tst    %2, #0x80000000\n\t"                                            \
  48         "mov    %0, %4\n\t"                                                     \
  49         "addeq  %0, %0, %3\n\t"                                                 \
  50         "ldr" instr "   %1, [%0, %2]    @ in" #fnsuffix                         \
  51         : "=&r" (temp), "=r" (value)                                            \
  52         : "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)                \
  53         : "cc");                                                                \
  54         return (unsigned sz)value;                                              \
  55 }
  56
  57 static inline unsigned int __ioaddr (unsigned int port)                 \
  58 {                                                                               \
  59         if (__PORT_PCIO(port))                                                  \
  60                 return (unsigned int)(PCIO_BASE + (port));                      \
  61         else                                                                    \
  62                 return (unsigned int)(IO_BASE + (port));                        \
  63 }
  64
  65 #define DECLARE_IO(sz,fnsuffix,instr)   \
  66         DECLARE_DYN_OUT(fnsuffix,instr) \
  67         DECLARE_DYN_IN(sz,fnsuffix,instr)
  68
  69 DECLARE_IO(char,b,"b")
  70 DECLARE_IO(short,w,"h")
  71 DECLARE_IO(long,l,"")
  72
  73 #undef DECLARE_IO
  74 #undef DECLARE_DYN_OUT
  75 #undef DECLARE_DYN_IN
  76
  77 /*
  78  * Constant address IO functions
  79  *
  80  * These have to be macros for the 'J' constraint to work -
  81  * +/-4096 immediate operand.
  82  */
  83 #define __outbc(value,port)                                                     \
  84 ({                                                                              \
  85         if (__PORT_PCIO((port)))                                                \
  86                 __asm__ __volatile__(                                           \
  87                 "strb   %0, [%1, %2]            @ outbc"                        \
  88                 : : "r" (value), "r" (PCIO_BASE), "Jr" (port));         \
  89         else                                                                    \
  90                 __asm__ __volatile__(                                           \
  91                 "strb   %0, [%1, %2]            @ outbc"                        \
  92                 : : "r" (value), "r" (IO_BASE), "r" (port));            \
  93 })
  94
  95 #define __inbc(port)                                                            \
  96 ({                                                                              \
  97         unsigned char result;                                                   \
  98         if (__PORT_PCIO((port)))                                                \
  99                 __asm__ __volatile__(                                           \
 100                 "ldrb   %0, [%1, %2]            @ inbc"                         \
 101                 : "=r" (result) : "r" (PCIO_BASE), "Jr" (port));                \
 102         else                                                                    \
 103                 __asm__ __volatile__(                                           \
 104                 "ldrb   %0, [%1, %2]            @ inbc"                         \
 105                 : "=r" (result) : "r" (IO_BASE), "r" (port));           \
 106         result;                                                                 \
 107 })
 108
 109 #define __outwc(value,port)                                                     \
 110 ({                                                                              \
 111         unsigned long v = value;                                                \
 112         if (__PORT_PCIO((port)))                                                \
 113                 __asm__ __volatile__(                                           \
 114                 "strh   %0, [%1, %2]            @ outwc"                        \
 115                 : : "r" (v|v<<16), "r" (PCIO_BASE), "Jr" (port));       \
 116         else                                                                    \
 117                 __asm__ __volatile__(                                           \
 118                 "strh   %0, [%1, %2]            @ outwc"                        \
 119                 : : "r" (v|v<<16), "r" (IO_BASE), "r" (port));          \
 120 })
 121
 122 #define __inwc(port)                                                            \
 123 ({                                                                              \
 124         unsigned short result;                                                  \
 125         if (__PORT_PCIO((port)))                                                \
 126                 __asm__ __volatile__(                                           \
 127                 "ldrh   %0, [%1, %2]            @ inwc"                         \
 128                 : "=r" (result) : "r" (PCIO_BASE), "Jr" (port));                \
 129         else                                                                    \
 130                 __asm__ __volatile__(                                           \
 131                 "ldrh   %0, [%1, %2]            @ inwc"                         \
 132                 : "=r" (result) : "r" (IO_BASE), "r" (port));           \
 133         result & 0xffff;                                                        \
 134 })
 135
 136 #define __outlc(value,port)                                                             \
 137 ({                                                                              \
 138         unsigned long v = value;                                                \
 139         if (__PORT_PCIO((port)))                                                \
 140                 __asm__ __volatile__(                                           \
 141                 "str    %0, [%1, %2]            @ outlc"                        \
 142                 : : "r" (v), "r" (PCIO_BASE), "Jr" (port));             \
 143         else                                                                    \
 144                 __asm__ __volatile__(                                           \
 145                 "str    %0, [%1, %2]            @ outlc"                        \
 146                 : : "r" (v), "r" (IO_BASE), "r" (port));                        \
 147 })
 148
 149 #define __inlc(port)                                                            \
 150 ({                                                                              \
 151         unsigned long result;                                                   \
 152         if (__PORT_PCIO((port)))                                                \
 153                 __asm__ __volatile__(                                           \
 154                 "ldr    %0, [%1, %2]            @ inlc"                         \
 155                 : "=r" (result) : "r" (PCIO_BASE), "Jr" (port));                \
 156         else                                                                    \
 157                 __asm__ __volatile__(                                           \
 158                 "ldr    %0, [%1, %2]            @ inlc"                         \
 159                 : "=r" (result) : "r" (IO_BASE), "r" (port));           \
 160         result;                                                                 \
 161 })
 162
 163 #define __ioaddrc(port)                                                         \
 164 ({                                                                              \
 165         unsigned long addr;                                                     \
 166         if (__PORT_PCIO((port)))                                                \
 167                 addr = PCIO_BASE + (port);                              \
 168         else                                                                    \
 169                 addr = IO_BASE + (port);                                        \
 170         addr;                                                                   \
 171 })
 172
 173 #define __mem_pci(addr) addr
 174
 175 #define inb(p)          (__builtin_constant_p((p)) ? __inbc(p)    : __inb(p))
 176 #define inw(p)          (__builtin_constant_p((p)) ? __inwc(p)    : __inw(p))
 177 #define inl(p)          (__builtin_constant_p((p)) ? __inlc(p)    : __inl(p))
 178 #define outb(v,p)       (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p))
 179 #define outw(v,p)       (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p))
 180 #define outl(v,p)       (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p))
 181
 182 /*
 183  * Translated address IO functions
 184  *
 185  * IO address has already been translated to a virtual address
 186  */
 187 #define outb_t(v,p)                                                             \
 188         (*(volatile unsigned char *)(p) = (v))
 189
 190 #define inb_t(p)                                                                \
 191         (*(volatile unsigned char *)(p))
 192
 193 #define outl_t(v,p)                                                             \
 194         (*(volatile unsigned long *)(p) = (v))
 195
 196 #define inl_t(p)                                                                \
 197         (*(volatile unsigned long *)(p))
 198
 199 #endif