target/linux/brcm-2.4/files/arch/mips/bcm947xx/include/bcmendian.h

   1 /*
   2  * local version of endian.h - byte order defines
   3  *
   4  * Copyright 2007, Broadcom Corporation
   5  * All Rights Reserved.
   6  *
   7  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   8  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
   9  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  10  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  11  *
  12  *  $Id$
  13 */
  14
  15 #ifndef _BCMENDIAN_H_
  16 #define _BCMENDIAN_H_
  17
  18 #include <typedefs.h>
  19
  20 /* Byte swap a 16 bit value */
  21 #define BCMSWAP16(val) \
  22         ((uint16)(\
  23                 (((uint16)(val) & (uint16)0x00ffU) << 8) | \
  24                 (((uint16)(val) & (uint16)0xff00U) >> 8)))
  25
  26 /* Byte swap a 32 bit value */
  27 #define BCMSWAP32(val) \
  28         ((uint32)(\
  29                 (((uint32)(val) & (uint32)0x000000ffUL) << 24) | \
  30                 (((uint32)(val) & (uint32)0x0000ff00UL) <<  8) | \
  31                 (((uint32)(val) & (uint32)0x00ff0000UL) >>  8) | \
  32                 (((uint32)(val) & (uint32)0xff000000UL) >> 24)))
  33
  34 /* 2 Byte swap a 32 bit value */
  35 #define BCMSWAP32BY16(val) \
  36         ((uint32)(\
  37                 (((uint32)(val) & (uint32)0x0000ffffUL) << 16) | \
  38                 (((uint32)(val) & (uint32)0xffff0000UL) >> 16)))
  39
  40
  41 static INLINE uint16
  42 bcmswap16(uint16 val)
  43 {
  44         return BCMSWAP16(val);
  45 }
  46
  47 static INLINE uint32
  48 bcmswap32(uint32 val)
  49 {
  50         return BCMSWAP32(val);
  51 }
  52
  53 static INLINE uint32
  54 bcmswap32by16(uint32 val)
  55 {
  56         return BCMSWAP32BY16(val);
  57 }
  58
  59 /* buf  - start of buffer of shorts to swap */
  60 /* len  - byte length of buffer */
  61 static INLINE void
  62 bcmswap16_buf(uint16 *buf, uint len)
  63 {
  64         len = len/2;
  65
  66         while (len--) {
  67                 *buf = bcmswap16(*buf);
  68                 buf++;
  69         }
  70 }
  71
  72 #ifndef hton16
  73 #ifndef IL_BIGENDIAN
  74 #define HTON16(i) BCMSWAP16(i)
  75 #define hton16(i) bcmswap16(i)
  76 #define hton32(i) bcmswap32(i)
  77 #define ntoh16(i) bcmswap16(i)
  78 #define ntoh32(i) bcmswap32(i)
  79 #define ltoh16(i) (i)
  80 #define ltoh32(i) (i)
  81 #define htol16(i) (i)
  82 #define htol32(i) (i)
  83 #else
  84 #define HTON16(i) (i)
  85 #define hton16(i) (i)
  86 #define hton32(i) (i)
  87 #define ntoh16(i) (i)
  88 #define ntoh32(i) (i)
  89 #define ltoh16(i) bcmswap16(i)
  90 #define ltoh32(i) bcmswap32(i)
  91 #define htol16(i) bcmswap16(i)
  92 #define htol32(i) bcmswap32(i)
  93 #endif /* IL_BIGENDIAN */
  94 #endif /* hton16 */
  95
  96 #ifndef IL_BIGENDIAN
  97 #define ltoh16_buf(buf, i)
  98 #define htol16_buf(buf, i)
  99 #else
 100 #define ltoh16_buf(buf, i) bcmswap16_buf((uint16*)buf, i)
 101 #define htol16_buf(buf, i) bcmswap16_buf((uint16*)buf, i)
 102 #endif /* IL_BIGENDIAN */
 103
 104 /*
 105 * store 16-bit value to unaligned little endian byte array.
 106 */
 107 static INLINE void
 108 htol16_ua_store(uint16 val, uint8 *bytes)
 109 {
 110         bytes[0] = val&0xff;
 111         bytes[1] = val>>8;
 112 }
 113
 114 /*
 115 * store 32-bit value to unaligned little endian byte array.
 116 */
 117 static INLINE void
 118 htol32_ua_store(uint32 val, uint8 *bytes)
 119 {
 120         bytes[0] = val&0xff;
 121         bytes[1] = (val>>8)&0xff;
 122         bytes[2] = (val>>16)&0xff;
 123         bytes[3] = val>>24;
 124 }
 125
 126 /*
 127 * store 16-bit value to unaligned network(big) endian byte array.
 128 */
 129 static INLINE void
 130 hton16_ua_store(uint16 val, uint8 *bytes)
 131 {
 132         bytes[1] = val&0xff;
 133         bytes[0] = val>>8;
 134 }
 135
 136 /*
 137 * store 32-bit value to unaligned network(big) endian byte array.
 138 */
 139 static INLINE void
 140 hton32_ua_store(uint32 val, uint8 *bytes)
 141 {
 142         bytes[3] = val&0xff;
 143         bytes[2] = (val>>8)&0xff;
 144         bytes[1] = (val>>16)&0xff;
 145         bytes[0] = val>>24;
 146 }
 147
 148 /*
 149 * load 16-bit value from unaligned little endian byte array.
 150 */
 151 static INLINE uint16
 152 ltoh16_ua(void *bytes)
 153 {
 154         return (((uint8*)bytes)[1]<<8)+((uint8 *)bytes)[0];
 155 }
 156
 157 /*
 158 * load 32-bit value from unaligned little endian byte array.
 159 */
 160 static INLINE uint32
 161 ltoh32_ua(void *bytes)
 162 {
 163         return (((uint8*)bytes)[3]<<24)+(((uint8*)bytes)[2]<<16)+
 164                (((uint8*)bytes)[1]<<8)+((uint8*)bytes)[0];
 165 }
 166
 167 /*
 168 * load 16-bit value from unaligned big(network) endian byte array.
 169 */
 170 static INLINE uint16
 171 ntoh16_ua(void *bytes)
 172 {
 173         return (((uint8*)bytes)[0]<<8)+((uint8*)bytes)[1];
 174 }
 175
 176 /*
 177 * load 32-bit value from unaligned big(network) endian byte array.
 178 */
 179 static INLINE uint32
 180 ntoh32_ua(void *bytes)
 181 {
 182         return (((uint8*)bytes)[0]<<24)+(((uint8*)bytes)[1]<<16)+
 183                (((uint8*)bytes)[2]<<8)+((uint8*)bytes)[3];
 184 }
 185
 186 #define ltoh_ua(ptr) (\
 187         sizeof(*(ptr)) == sizeof(uint8) ?  *(uint8 *)ptr : \
 188         sizeof(*(ptr)) == sizeof(uint16) ? (((uint8 *)ptr)[1]<<8)+((uint8 *)ptr)[0] : \
 189         (((uint8 *)ptr)[3]<<24)+(((uint8 *)ptr)[2]<<16)+(((uint8 *)ptr)[1]<<8)+((uint8 *)ptr)[0] \
 190 )
 191
 192 #define ntoh_ua(ptr) (\
 193         sizeof(*(ptr)) == sizeof(uint8) ?  *(uint8 *)ptr : \
 194         sizeof(*(ptr)) == sizeof(uint16) ? (((uint8 *)ptr)[0]<<8)+((uint8 *)ptr)[1] : \
 195         (((uint8 *)ptr)[0]<<24)+(((uint8 *)ptr)[1]<<16)+(((uint8 *)ptr)[2]<<8)+((uint8 *)ptr)[3] \
 196 )
 197
 198 #endif /* _BCMENDIAN_H_ */