Ali Bahar | 0e54f60 | 2011-08-23 13:53:37 +0800 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of version 2 of the GNU General Public License as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., |
| 16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| 17 | * |
Ali Bahar | b4f6209 | 2011-08-23 13:53:38 +0800 | [diff] [blame] | 18 | * Modifications for inclusion into the Linux staging tree are |
| 19 | * Copyright(c) 2010 Larry Finger. All rights reserved. |
| 20 | * |
| 21 | * Contact information: |
| 22 | * WLAN FAE <wlanfae@realtek.com> |
| 23 | * Larry Finger <Larry.Finger@lwfinger.net> |
Ali Bahar | 0e54f60 | 2011-08-23 13:53:37 +0800 | [diff] [blame] | 24 | * |
| 25 | ******************************************************************************/ |
Larry Finger | 2865d42 | 2010-08-20 10:15:30 -0500 | [diff] [blame] | 26 | #ifndef _LINUX_BYTEORDER_GENERIC_H |
| 27 | #define _LINUX_BYTEORDER_GENERIC_H |
| 28 | |
| 29 | /* |
| 30 | * linux/byteorder_generic.h |
| 31 | * Generic Byte-reordering support |
| 32 | * |
| 33 | * Francois-Rene Rideau <fare@tunes.org> 19970707 |
| 34 | * gathered all the good ideas from all asm-foo/byteorder.h into one file, |
| 35 | * cleaned them up. |
| 36 | * I hope it is compliant with non-GCC compilers. |
| 37 | * I decided to put __BYTEORDER_HAS_U64__ in byteorder.h, |
| 38 | * because I wasn't sure it would be ok to put it in types.h |
| 39 | * Upgraded it to 2.1.43 |
| 40 | * Francois-Rene Rideau <fare@tunes.org> 19971012 |
| 41 | * Upgraded it to 2.1.57 |
| 42 | * to please Linus T., replaced huge #ifdef's between little/big endian |
| 43 | * by nestedly #include'd files. |
| 44 | * Francois-Rene Rideau <fare@tunes.org> 19971205 |
| 45 | * Made it to 2.1.71; now a facelift: |
| 46 | * Put files under include/linux/byteorder/ |
| 47 | * Split swab from generic support. |
| 48 | * |
| 49 | * TODO: |
| 50 | * = Regular kernel maintainers could also replace all these manual |
| 51 | * byteswap macros that remain, disseminated among drivers, |
| 52 | * after some grep or the sources... |
| 53 | * = Linus might want to rename all these macros and files to fit his taste, |
| 54 | * to fit his personal naming scheme. |
| 55 | * = it seems that a few drivers would also appreciate |
| 56 | * nybble swapping support... |
| 57 | * = every architecture could add their byteswap macro in asm/byteorder.h |
| 58 | * see how some architectures already do (i386, alpha, ppc, etc) |
| 59 | * = cpu_to_beXX and beXX_to_cpu might some day need to be well |
| 60 | * distinguished throughout the kernel. This is not the case currently, |
| 61 | * since little endian, big endian, and pdp endian machines needn't it. |
| 62 | * But this might be the case for, say, a port of Linux to 20/21 bit |
| 63 | * architectures (and F21 Linux addict around?). |
| 64 | */ |
| 65 | |
| 66 | /* |
| 67 | * The following macros are to be defined by <asm/byteorder.h>: |
| 68 | * |
| 69 | * Conversion of long and short int between network and host format |
| 70 | * ntohl(__u32 x) |
| 71 | * ntohs(__u16 x) |
| 72 | * htonl(__u32 x) |
| 73 | * htons(__u16 x) |
| 74 | * It seems that some programs (which? where? or perhaps a standard? POSIX?) |
| 75 | * might like the above to be functions, not macros (why?). |
| 76 | * if that's true, then detect them, and take measures. |
| 77 | * Anyway, the measure is: define only ___ntohl as a macro instead, |
| 78 | * and in a separate file, have |
| 79 | * unsigned long inline ntohl(x){return ___ntohl(x);} |
| 80 | * |
| 81 | * The same for constant arguments |
| 82 | * __constant_ntohl(__u32 x) |
| 83 | * __constant_ntohs(__u16 x) |
| 84 | * __constant_htonl(__u32 x) |
| 85 | * __constant_htons(__u16 x) |
| 86 | * |
| 87 | * Conversion of XX-bit integers (16- 32- or 64-) |
| 88 | * between native CPU format and little/big endian format |
| 89 | * 64-bit stuff only defined for proper architectures |
| 90 | * cpu_to_[bl]eXX(__uXX x) |
| 91 | * [bl]eXX_to_cpu(__uXX x) |
| 92 | * |
| 93 | * The same, but takes a pointer to the value to convert |
| 94 | * cpu_to_[bl]eXXp(__uXX x) |
| 95 | * [bl]eXX_to_cpup(__uXX x) |
| 96 | * |
| 97 | * The same, but change in situ |
| 98 | * cpu_to_[bl]eXXs(__uXX x) |
| 99 | * [bl]eXX_to_cpus(__uXX x) |
| 100 | * |
| 101 | * See asm-foo/byteorder.h for examples of how to provide |
| 102 | * architecture-optimized versions |
| 103 | * |
| 104 | */ |
| 105 | |
| 106 | |
| 107 | /* |
| 108 | * inside the kernel, we can use nicknames; |
| 109 | * outside of it, we must avoid POSIX namespace pollution... |
| 110 | */ |
| 111 | #define cpu_to_le64 __cpu_to_le64 |
| 112 | #define le64_to_cpu __le64_to_cpu |
| 113 | #define cpu_to_le32 __cpu_to_le32 |
| 114 | #define le32_to_cpu __le32_to_cpu |
| 115 | #define cpu_to_le16 __cpu_to_le16 |
| 116 | #define le16_to_cpu __le16_to_cpu |
| 117 | #define cpu_to_be64 __cpu_to_be64 |
| 118 | #define be64_to_cpu __be64_to_cpu |
| 119 | #define cpu_to_be32 __cpu_to_be32 |
| 120 | #define be32_to_cpu __be32_to_cpu |
| 121 | #define cpu_to_be16 __cpu_to_be16 |
| 122 | #define be16_to_cpu __be16_to_cpu |
| 123 | #define cpu_to_le64p __cpu_to_le64p |
| 124 | #define le64_to_cpup __le64_to_cpup |
| 125 | #define cpu_to_le32p __cpu_to_le32p |
| 126 | #define le32_to_cpup __le32_to_cpup |
| 127 | #define cpu_to_le16p __cpu_to_le16p |
| 128 | #define le16_to_cpup __le16_to_cpup |
| 129 | #define cpu_to_be64p __cpu_to_be64p |
| 130 | #define be64_to_cpup __be64_to_cpup |
| 131 | #define cpu_to_be32p __cpu_to_be32p |
| 132 | #define be32_to_cpup __be32_to_cpup |
| 133 | #define cpu_to_be16p __cpu_to_be16p |
| 134 | #define be16_to_cpup __be16_to_cpup |
| 135 | #define cpu_to_le64s __cpu_to_le64s |
| 136 | #define le64_to_cpus __le64_to_cpus |
| 137 | #define cpu_to_le32s __cpu_to_le32s |
| 138 | #define le32_to_cpus __le32_to_cpus |
| 139 | #define cpu_to_le16s __cpu_to_le16s |
| 140 | #define le16_to_cpus __le16_to_cpus |
| 141 | #define cpu_to_be64s __cpu_to_be64s |
| 142 | #define be64_to_cpus __be64_to_cpus |
| 143 | #define cpu_to_be32s __cpu_to_be32s |
| 144 | #define be32_to_cpus __be32_to_cpus |
| 145 | #define cpu_to_be16s __cpu_to_be16s |
| 146 | #define be16_to_cpus __be16_to_cpus |
| 147 | |
| 148 | |
| 149 | /* |
| 150 | * Handle ntohl and suches. These have various compatibility |
| 151 | * issues - like we want to give the prototype even though we |
| 152 | * also have a macro for them in case some strange program |
| 153 | * wants to take the address of the thing or something.. |
| 154 | * |
| 155 | * Note that these used to return a "long" in libc5, even though |
| 156 | * long is often 64-bit these days.. Thus the casts. |
| 157 | * |
| 158 | * They have to be macros in order to do the constant folding |
| 159 | * correctly - if the argument passed into a inline function |
| 160 | * it is no longer constant according to gcc.. |
| 161 | */ |
| 162 | |
| 163 | #undef ntohl |
| 164 | #undef ntohs |
| 165 | #undef htonl |
| 166 | #undef htons |
| 167 | |
| 168 | /* |
| 169 | * Do the prototypes. Somebody might want to take the |
| 170 | * address or some such sick thing.. |
| 171 | */ |
| 172 | extern __u32 ntohl(__u32); |
| 173 | extern __u32 htonl(__u32); |
| 174 | extern unsigned short int ntohs(unsigned short int); |
| 175 | extern unsigned short int htons(unsigned short int); |
| 176 | |
| 177 | #endif /* _LINUX_BYTEORDER_GENERIC_H */ |
| 178 | |