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   1 /*
   2  * linux/include/asm-arm/arch-cl7500/io.h
   3  *  from linux/include/asm-arm/arch-rpc/io.h
   4  *
   5  * Copyright (C) 1997 Russell King
   6  *
   7  * Modifications:
   8  *  06-Dec-1997 RMK     Created.
   9  */
  10 #ifndef __ASM_ARM_ARCH_IO_H
  11 #define __ASM_ARM_ARCH_IO_H
  12
  13 #include <asm/hardware.h>
  14
  15 #define IO_SPACE_LIMIT 0xffffffff
  16
  17 /*
  18  * GCC is totally crap at loading/storing data.  We try to persuade it
  19  * to do the right thing by using these whereever possible instead of
  20  * the above.
  21  */
  22 #define __arch_base_getb(b,o)                   \
  23  ({                                             \
  24         unsigned int v, r = (b);                \
  25         __asm__ __volatile__(                   \
  26                 "ldrb   %0, [%1, %2]"           \
  27                 : "=r" (v)                      \
  28                 : "r" (r), "Ir" (o));           \
  29         v;                                      \
  30  })
  31
  32 #define __arch_base_getl(b,o)                   \
  33  ({                                             \
  34         unsigned int v, r = (b);                \
  35         __asm__ __volatile__(                   \
  36                 "ldr    %0, [%1, %2]"           \
  37                 : "=r" (v)                      \
  38                 : "r" (r), "Ir" (o));           \
  39         v;                                      \
  40  })
  41
  42 #define __arch_base_putb(v,b,o)                 \
  43  ({                                             \
  44         unsigned int r = (b);                   \
  45         __asm__ __volatile__(                   \
  46                 "strb   %0, [%1, %2]"           \
  47                 :                               \
  48                 : "r" (v), "r" (r), "Ir" (o));  \
  49  })
  50
  51 #define __arch_base_putl(v,b,o)                 \
  52  ({                                             \
  53         unsigned int r = (b);                   \
  54         __asm__ __volatile__(                   \
  55                 "str    %0, [%1, %2]"           \
  56                 :                               \
  57                 : "r" (v), "r" (r), "Ir" (o));  \
  58  })
  59
  60 /*
  61  * We use two different types of addressing - PC style addresses, and ARM
  62  * addresses.  PC style accesses the PC hardware with the normal PC IO
  63  * addresses, eg 0x3f8 for serial#1.  ARM addresses are 0x80000000+
  64  * and are translated to the start of IO.  Note that all addresses are
  65  * shifted left!
  66  */
  67 #define __PORT_PCIO(x)  (!((x) & 0x80000000))
  68
  69 /*
  70  * Dynamic IO functions - let the compiler
  71  * optimize the expressions
  72  */
  73 static inline void __outb (unsigned int value, unsigned int port)
  74 {
  75         unsigned long temp;
  76         __asm__ __volatile__(
  77         "tst    %2, #0x80000000\n\t"
  78         "mov    %0, %4\n\t"
  79         "addeq  %0, %0, %3\n\t"
  80         "strb   %1, [%0, %2, lsl #2]    @ outb"
  81         : "=&r" (temp)
  82         : "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
  83         : "cc");
  84 }
  85
  86 static inline void __outw (unsigned int value, unsigned int port)
  87 {
  88         unsigned long temp;
  89         __asm__ __volatile__(
  90         "tst    %2, #0x80000000\n\t"
  91         "mov    %0, %4\n\t"
  92         "addeq  %0, %0, %3\n\t"
  93         "str    %1, [%0, %2, lsl #2]    @ outw"
  94         : "=&r" (temp)
  95         : "r" (value|value<<16), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
  96         : "cc");
  97 }
  98
  99 static inline void __outl (unsigned int value, unsigned int port)
 100 {
 101         unsigned long temp;
 102         __asm__ __volatile__(
 103         "tst    %2, #0x80000000\n\t"
 104         "mov    %0, %4\n\t"
 105         "addeq  %0, %0, %3\n\t"
 106         "str    %1, [%0, %2, lsl #2]    @ outl"
 107         : "=&r" (temp)
 108         : "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
 109         : "cc");
 110 }
 111
 112 #define DECLARE_DYN_IN(sz,fnsuffix,instr)                                       \
 113 static inline unsigned sz __in##fnsuffix (unsigned int port)            \
 114 {                                                                               \
 115         unsigned long temp, value;                                              \
 116         __asm__ __volatile__(                                                   \
 117         "tst    %2, #0x80000000\n\t"                                            \
 118         "mov    %0, %4\n\t"                                                     \
 119         "addeq  %0, %0, %3\n\t"                                                 \
 120         "ldr" instr "   %1, [%0, %2, lsl #2]    @ in" #fnsuffix                 \
 121         : "=&r" (temp), "=r" (value)                                            \
 122         : "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)                \
 123         : "cc");                                                                \
 124         return (unsigned sz)value;                                              \
 125 }
 126
 127 static inline unsigned int __ioaddr (unsigned int port)                 \
 128 {                                                                               \
 129         if (__PORT_PCIO(port))                                                  \
 130                 return (unsigned int)(PCIO_BASE + (port << 2));                 \
 131         else                                                                    \
 132                 return (unsigned int)(IO_BASE + (port << 2));                   \
 133 }
 134
 135 #define DECLARE_IO(sz,fnsuffix,instr)   \
 136         DECLARE_DYN_IN(sz,fnsuffix,instr)
 137
 138 DECLARE_IO(char,b,"b")
 139 DECLARE_IO(short,w,"")
 140 DECLARE_IO(int,l,"")
 141
 142 #undef DECLARE_IO
 143 #undef DECLARE_DYN_IN
 144
 145 /*
 146  * Constant address IO functions
 147  *
 148  * These have to be macros for the 'J' constraint to work -
 149  * +/-4096 immediate operand.
 150  */
 151 #define __outbc(value,port)                                                     \
 152 ({                                                                              \
 153         if (__PORT_PCIO((port)))                                                \
 154                 __asm__ __volatile__(                                           \
 155                 "strb   %0, [%1, %2]    @ outbc"                                \
 156                 : : "r" (value), "r" (PCIO_BASE), "Jr" ((port) << 2));          \
 157         else                                                                    \
 158                 __asm__ __volatile__(                                           \
 159                 "strb   %0, [%1, %2]    @ outbc"                                \
 160                 : : "r" (value), "r" (IO_BASE), "r" ((port) << 2));             \
 161 })
 162
 163 #define __inbc(port)                                                            \
 164 ({                                                                              \
 165         unsigned char result;                                                   \
 166         if (__PORT_PCIO((port)))                                                \
 167                 __asm__ __volatile__(                                           \
 168                 "ldrb   %0, [%1, %2]    @ inbc"                                 \
 169                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2));         \
 170         else                                                                    \
 171                 __asm__ __volatile__(                                           \
 172                 "ldrb   %0, [%1, %2]    @ inbc"                                 \
 173                 : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2));            \
 174         result;                                                                 \
 175 })
 176
 177 #define __outwc(value,port)                                                     \
 178 ({                                                                              \
 179         unsigned long v = value;                                                \
 180         if (__PORT_PCIO((port)))                                                \
 181                 __asm__ __volatile__(                                           \
 182                 "str    %0, [%1, %2]    @ outwc"                                \
 183                 : : "r" (v|v<<16), "r" (PCIO_BASE), "Jr" ((port) << 2));        \
 184         else                                                                    \
 185                 __asm__ __volatile__(                                           \
 186                 "str    %0, [%1, %2]    @ outwc"                                \
 187                 : : "r" (v|v<<16), "r" (IO_BASE), "r" ((port) << 2));           \
 188 })
 189
 190 #define __inwc(port)                                                            \
 191 ({                                                                              \
 192         unsigned short result;                                                  \
 193         if (__PORT_PCIO((port)))                                                \
 194                 __asm__ __volatile__(                                           \
 195                 "ldr    %0, [%1, %2]    @ inwc"                                 \
 196                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2));         \
 197         else                                                                    \
 198                 __asm__ __volatile__(                                           \
 199                 "ldr    %0, [%1, %2]    @ inwc"                                 \
 200                 : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2));            \
 201         result & 0xffff;                                                        \
 202 })
 203
 204 #define __outlc(value,port)                                                     \
 205 ({                                                                              \
 206         unsigned long v = value;                                                \
 207         if (__PORT_PCIO((port)))                                                \
 208                 __asm__ __volatile__(                                           \
 209                 "str    %0, [%1, %2]    @ outlc"                                \
 210                 : : "r" (v), "r" (PCIO_BASE), "Jr" ((port) << 2));              \
 211         else                                                                    \
 212                 __asm__ __volatile__(                                           \
 213                 "str    %0, [%1, %2]    @ outlc"                                \
 214                 : : "r" (v), "r" (IO_BASE), "r" ((port) << 2));                 \
 215 })
 216
 217 #define __inlc(port)                                                            \
 218 ({                                                                              \
 219         unsigned long result;                                                   \
 220         if (__PORT_PCIO((port)))                                                \
 221                 __asm__ __volatile__(                                           \
 222                 "ldr    %0, [%1, %2]    @ inlc"                                 \
 223                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2));         \
 224         else                                                                    \
 225                 __asm__ __volatile__(                                           \
 226                 "ldr    %0, [%1, %2]    @ inlc"                                 \
 227                 : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2));            \
 228         result;                                                                 \
 229 })
 230
 231 #define __ioaddrc(port)                                                         \
 232         (__PORT_PCIO((port)) ? PCIO_BASE + ((port) << 2) : IO_BASE + ((port) << 2))
 233
 234 #define inb(p)          (__builtin_constant_p((p)) ? __inbc(p)    : __inb(p))
 235 #define inw(p)          (__builtin_constant_p((p)) ? __inwc(p)    : __inw(p))
 236 #define inl(p)          (__builtin_constant_p((p)) ? __inlc(p)    : __inl(p))
 237 #define outb(v,p)       (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p))
 238 #define outw(v,p)       (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p))
 239 #define outl(v,p)       (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p))
 240 #define __ioaddr(p)     (__builtin_constant_p((p)) ? __ioaddr(p)  : __ioaddrc(p))
 241 /* the following macro is deprecated */
 242 #define ioaddr(port)                    __ioaddr((port))
 243
 244 #define insb(p,d,l)     __raw_readsb(__ioaddr(p),d,l)
 245 #define insw(p,d,l)     __raw_readsw(__ioaddr(p),d,l)
 246
 247 #define outsb(p,d,l)    __raw_writesb(__ioaddr(p),d,l)
 248 #define outsw(p,d,l)    __raw_writesw(__ioaddr(p),d,l)
 249
 250 /*
 251  * 1:1 mapping for ioremapped regions.
 252  */
 253 #define __mem_pci(x)    (x)
 254
 255 #endif