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 */
  13
  14 #ifndef _BCMENDIAN_H_
  15 #define _BCMENDIAN_H_
  16
  17 #include <typedefs.h>
  18
  19 /* Byte swap a 16 bit value */
  20 #define BCMSWAP16(val) \
  21         ((uint16)(\
  22                 (((uint16)(val) & (uint16)0x00ffU) << 8) | \
  23                 (((uint16)(val) & (uint16)0xff00U) >> 8)))
  24
  25 /* Byte swap a 32 bit value */
  26 #define BCMSWAP32(val) \
  27         ((uint32)(\
  28                 (((uint32)(val) & (uint32)0x000000ffUL) << 24) | \
  29                 (((uint32)(val) & (uint32)0x0000ff00UL) <<  8) | \
  30                 (((uint32)(val) & (uint32)0x00ff0000UL) >>  8) | \
  31                 (((uint32)(val) & (uint32)0xff000000UL) >> 24)))
  32
  33 /* 2 Byte swap a 32 bit value */
  34 #define BCMSWAP32BY16(val) \
  35         ((uint32)(\
  36                 (((uint32)(val) & (uint32)0x0000ffffUL) << 16) | \
  37                 (((uint32)(val) & (uint32)0xffff0000UL) >> 16)))
  38
  39
  40 static INLINE uint16
  41 bcmswap16(uint16 val)
  42 {
  43         return BCMSWAP16(val);
  44 }
  45
  46 static INLINE uint32
  47 bcmswap32(uint32 val)
  48 {
  49         return BCMSWAP32(val);
  50 }
  51
  52 static INLINE uint32
  53 bcmswap32by16(uint32 val)
  54 {
  55         return BCMSWAP32BY16(val);
  56 }
  57
  58 /* buf  - start of buffer of shorts to swap */
  59 /* len  - byte length of buffer */
  60 static INLINE void
  61 bcmswap16_buf(uint16 *buf, uint len)
  62 {
  63         len = len/2;
  64
  65         while (len--) {
  66                 *buf = bcmswap16(*buf);
  67                 buf++;
  68         }
  69 }
  70
  71 #ifndef hton16
  72 #ifndef IL_BIGENDIAN
  73 #define HTON16(i) BCMSWAP16(i)
  74 #define hton16(i) bcmswap16(i)
  75 #define hton32(i) bcmswap32(i)
  76 #define ntoh16(i) bcmswap16(i)
  77 #define ntoh32(i) bcmswap32(i)
  78 #define ltoh16(i) (i)
  79 #define ltoh32(i) (i)
  80 #define htol16(i) (i)
  81 #define htol32(i) (i)
  82 #else
  83 #define HTON16(i) (i)
  84 #define hton16(i) (i)
  85 #define hton32(i) (i)
  86 #define ntoh16(i) (i)
  87 #define ntoh32(i) (i)
  88 #define ltoh16(i) bcmswap16(i)
  89 #define ltoh32(i) bcmswap32(i)
  90 #define htol16(i) bcmswap16(i)
  91 #define htol32(i) bcmswap32(i)
  92 #endif /* IL_BIGENDIAN */
  93 #endif /* hton16 */
  94
  95 #ifndef IL_BIGENDIAN
  96 #define ltoh16_buf(buf, i)
  97 #define htol16_buf(buf, i)
  98 #else
  99 #define ltoh16_buf(buf, i) bcmswap16_buf((uint16*)buf, i)
 100 #define htol16_buf(buf, i) bcmswap16_buf((uint16*)buf, i)
 101 #endif /* IL_BIGENDIAN */
 102
 103 /*
 104 * store 16-bit value to unaligned little endian byte array.
 105 */
 106 static INLINE void
 107 htol16_ua_store(uint16 val, uint8 *bytes)
 108 {
 109         bytes[0] = val&0xff;
 110         bytes[1] = val>>8;
 111 }
 112
 113 /*
 114 * store 32-bit value to unaligned little endian byte array.
 115 */
 116 static INLINE void
 117 htol32_ua_store(uint32 val, uint8 *bytes)
 118 {
 119         bytes[0] = val&0xff;
 120         bytes[1] = (val>>8)&0xff;
 121         bytes[2] = (val>>16)&0xff;
 122         bytes[3] = val>>24;
 123 }
 124
 125 /*
 126 * store 16-bit value to unaligned network(big) endian byte array.
 127 */
 128 static INLINE void
 129 hton16_ua_store(uint16 val, uint8 *bytes)
 130 {
 131         bytes[1] = val&0xff;
 132         bytes[0] = val>>8;
 133 }
 134
 135 /*
 136 * store 32-bit value to unaligned network(big) endian byte array.
 137 */
 138 static INLINE void
 139 hton32_ua_store(uint32 val, uint8 *bytes)
 140 {
 141         bytes[3] = val&0xff;
 142         bytes[2] = (val>>8)&0xff;
 143         bytes[1] = (val>>16)&0xff;
 144         bytes[0] = val>>24;
 145 }
 146
 147 /*
 148 * load 16-bit value from unaligned little endian byte array.
 149 */
 150 static INLINE uint16
 151 ltoh16_ua(void *bytes)
 152 {
 153         return (((uint8*)bytes)[1]<<8)+((uint8 *)bytes)[0];
 154 }
 155
 156 /*
 157 * load 32-bit value from unaligned little endian byte array.
 158 */
 159 static INLINE uint32
 160 ltoh32_ua(void *bytes)
 161 {
 162         return (((uint8*)bytes)[3]<<24)+(((uint8*)bytes)[2]<<16)+
 163                (((uint8*)bytes)[1]<<8)+((uint8*)bytes)[0];
 164 }
 165
 166 /*
 167 * load 16-bit value from unaligned big(network) endian byte array.
 168 */
 169 static INLINE uint16
 170 ntoh16_ua(void *bytes)
 171 {
 172         return (((uint8*)bytes)[0]<<8)+((uint8*)bytes)[1];
 173 }
 174
 175 /*
 176 * load 32-bit value from unaligned big(network) endian byte array.
 177 */
 178 static INLINE uint32
 179 ntoh32_ua(void *bytes)
 180 {
 181         return (((uint8*)bytes)[0]<<24)+(((uint8*)bytes)[1]<<16)+
 182                (((uint8*)bytes)[2]<<8)+((uint8*)bytes)[3];
 183 }
 184
 185 #define ltoh_ua(ptr) (\
 186         sizeof(*(ptr)) == sizeof(uint8) ?  *(uint8 *)ptr : \
 187         sizeof(*(ptr)) == sizeof(uint16) ? (((uint8 *)ptr)[1]<<8)+((uint8 *)ptr)[0] : \
 188         (((uint8 *)ptr)[3]<<24)+(((uint8 *)ptr)[2]<<16)+(((uint8 *)ptr)[1]<<8)+((uint8 *)ptr)[0] \
 189 )
 190
 191 #define ntoh_ua(ptr) (\
 192         sizeof(*(ptr)) == sizeof(uint8) ?  *(uint8 *)ptr : \
 193         sizeof(*(ptr)) == sizeof(uint16) ? (((uint8 *)ptr)[0]<<8)+((uint8 *)ptr)[1] : \
 194         (((uint8 *)ptr)[0]<<24)+(((uint8 *)ptr)[1]<<16)+(((uint8 *)ptr)[2]<<8)+((uint8 *)ptr)[3] \
 195 )
 196
 197 #endif /* _BCMENDIAN_H_ */