diff options
Diffstat (limited to 'drivers/net/wireless/bcmdhd/include/bcmendian.h')
| -rw-r--r-- | drivers/net/wireless/bcmdhd/include/bcmendian.h | 67 |
1 files changed, 44 insertions, 23 deletions
diff --git a/drivers/net/wireless/bcmdhd/include/bcmendian.h b/drivers/net/wireless/bcmdhd/include/bcmendian.h index 22eb7db..1545f4e 100644 --- a/drivers/net/wireless/bcmdhd/include/bcmendian.h +++ b/drivers/net/wireless/bcmdhd/include/bcmendian.h @@ -1,7 +1,7 @@ /* * Byte order utilities * - * Copyright (C) 1999-2012, Broadcom Corporation + * Copyright (C) 1999-2013, Broadcom Corporation * * Unless you and Broadcom execute a separate written software license * agreement governing use of this software, this software is licensed to you @@ -32,24 +32,27 @@ #include <typedefs.h> - +/* Reverse the bytes in a 16-bit value */ #define BCMSWAP16(val) \ ((uint16)((((uint16)(val) & (uint16)0x00ffU) << 8) | \ (((uint16)(val) & (uint16)0xff00U) >> 8))) - +/* Reverse the bytes in a 32-bit value */ #define BCMSWAP32(val) \ ((uint32)((((uint32)(val) & (uint32)0x000000ffU) << 24) | \ (((uint32)(val) & (uint32)0x0000ff00U) << 8) | \ (((uint32)(val) & (uint32)0x00ff0000U) >> 8) | \ (((uint32)(val) & (uint32)0xff000000U) >> 24))) - +/* Reverse the two 16-bit halves of a 32-bit value */ #define BCMSWAP32BY16(val) \ ((uint32)((((uint32)(val) & (uint32)0x0000ffffU) << 16) | \ (((uint32)(val) & (uint32)0xffff0000U) >> 16))) - +/* Byte swapping macros + * Host <=> Network (Big Endian) for 16- and 32-bit values + * Host <=> Little-Endian for 16- and 32-bit values + */ #ifndef hton16 #define HTON16(i) BCMSWAP16(i) #define hton16(i) bcmswap16(i) @@ -67,12 +70,12 @@ #define htol16(i) (i) #define HTOL32(i) (i) #define htol32(i) (i) -#endif +#endif /* hton16 */ #define ltoh16_buf(buf, i) #define htol16_buf(buf, i) - +/* Unaligned loads and stores in host byte order */ #define load32_ua(a) ltoh32_ua(a) #define store32_ua(a, v) htol32_ua_store(v, a) #define load16_ua(a) ltoh16_ua(a) @@ -97,7 +100,9 @@ #ifdef __GNUC__ - +/* GNU macro versions avoid referencing the argument multiple times, while also + * avoiding the -fno-inline used in ROM builds. + */ #define bcmswap16(val) ({ \ uint16 _val = (val); \ @@ -175,9 +180,9 @@ _NTOH32_UA(_bytes); \ }) -#else - +#else /* !__GNUC__ */ +/* Inline versions avoid referencing the argument multiple times */ static INLINE uint16 bcmswap16(uint16 val) { @@ -196,9 +201,9 @@ bcmswap32by16(uint32 val) return BCMSWAP32BY16(val); } - - - +/* Reverse pairs of bytes in a buffer (not for high-performance use) */ +/* buf - start of buffer of shorts to swap */ +/* len - byte length of buffer */ static INLINE void bcmswap16_buf(uint16 *buf, uint len) { @@ -210,7 +215,9 @@ bcmswap16_buf(uint16 *buf, uint len) } } - +/* + * Store 16-bit value to unaligned little-endian byte array. + */ static INLINE void htol16_ua_store(uint16 val, uint8 *bytes) { @@ -218,7 +225,9 @@ htol16_ua_store(uint16 val, uint8 *bytes) bytes[1] = val >> 8; } - +/* + * Store 32-bit value to unaligned little-endian byte array. + */ static INLINE void htol32_ua_store(uint32 val, uint8 *bytes) { @@ -228,7 +237,9 @@ htol32_ua_store(uint32 val, uint8 *bytes) bytes[3] = val >> 24; } - +/* + * Store 16-bit value to unaligned network-(big-)endian byte array. + */ static INLINE void hton16_ua_store(uint16 val, uint8 *bytes) { @@ -236,7 +247,9 @@ hton16_ua_store(uint16 val, uint8 *bytes) bytes[1] = val & 0xff; } - +/* + * Store 32-bit value to unaligned network-(big-)endian byte array. + */ static INLINE void hton32_ua_store(uint32 val, uint8 *bytes) { @@ -246,33 +259,41 @@ hton32_ua_store(uint32 val, uint8 *bytes) bytes[3] = val & 0xff; } - +/* + * Load 16-bit value from unaligned little-endian byte array. + */ static INLINE uint16 ltoh16_ua(const void *bytes) { return _LTOH16_UA((const uint8 *)bytes); } - +/* + * Load 32-bit value from unaligned little-endian byte array. + */ static INLINE uint32 ltoh32_ua(const void *bytes) { return _LTOH32_UA((const uint8 *)bytes); } - +/* + * Load 16-bit value from unaligned big-(network-)endian byte array. + */ static INLINE uint16 ntoh16_ua(const void *bytes) { return _NTOH16_UA((const uint8 *)bytes); } - +/* + * Load 32-bit value from unaligned big-(network-)endian byte array. + */ static INLINE uint32 ntoh32_ua(const void *bytes) { return _NTOH32_UA((const uint8 *)bytes); } -#endif -#endif +#endif /* !__GNUC__ */ +#endif /* !_BCMENDIAN_H_ */ |