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Diffstat (limited to 'sys/gnu/fs/xfs/xfs_arch.h')
| -rw-r--r-- | sys/gnu/fs/xfs/xfs_arch.h | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/sys/gnu/fs/xfs/xfs_arch.h b/sys/gnu/fs/xfs/xfs_arch.h new file mode 100644 index 0000000..ea3c4f4 --- /dev/null +++ b/sys/gnu/fs/xfs/xfs_arch.h @@ -0,0 +1,322 @@ +/* + * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + * Further, this software is distributed without any warranty that it is + * free of the rightful claim of any third person regarding infringement + * or the like. Any license provided herein, whether implied or + * otherwise, applies only to this software file. Patent licenses, if + * any, provided herein do not apply to combinations of this program with + * other software, or any other product whatsoever. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, + * Mountain View, CA 94043, or: + * + * http://www.sgi.com + * + * For further information regarding this notice, see: + * + * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ + */ +#ifndef __XFS_ARCH_H__ +#define __XFS_ARCH_H__ + +#ifndef XFS_BIG_INUMS +# error XFS_BIG_INUMS must be defined true or false +#endif + +#ifdef __KERNEL__ + +#include <sys/endian.h> + +#define __LITTLE_ENDIAN _LITTLE_ENDIAN +#define __BIG_ENDIAN _BIG_ENDIAN +#define __BYTE_ORDER _BYTE_ORDER + +/* Compatibiliy defines */ +#define __swab16 __bswap16 +#define __swab32 __bswap32 +#define __swab64 __bswap64 +#endif /* __KERNEL__ */ + +/* do we need conversion? */ + +#define ARCH_NOCONVERT 1 +#if __BYTE_ORDER == __LITTLE_ENDIAN +# define ARCH_CONVERT 0 +#else +# define ARCH_CONVERT ARCH_NOCONVERT +#endif + +/* generic swapping macros */ + +#define INT_SWAP16(type,var) ((typeof(type))(__swab16((__u16)(var)))) +#define INT_SWAP32(type,var) ((typeof(type))(__swab32((__u32)(var)))) +#define INT_SWAP64(type,var) ((typeof(type))(__swab64((__u64)(var)))) + +#define INT_SWAP(type, var) \ + ((sizeof(type) == 8) ? INT_SWAP64(type,var) : \ + ((sizeof(type) == 4) ? INT_SWAP32(type,var) : \ + ((sizeof(type) == 2) ? INT_SWAP16(type,var) : \ + (var)))) + +#define INT_SWAP_UNALIGNED_32(from,to) \ + { \ + ((__u8*)(to))[0] = ((__u8*)(from))[3]; \ + ((__u8*)(to))[1] = ((__u8*)(from))[2]; \ + ((__u8*)(to))[2] = ((__u8*)(from))[1]; \ + ((__u8*)(to))[3] = ((__u8*)(from))[0]; \ + } + +#define INT_SWAP_UNALIGNED_64(from,to) \ + { \ + INT_SWAP_UNALIGNED_32( ((__u8*)(from)) + 4, ((__u8*)(to))); \ + INT_SWAP_UNALIGNED_32( ((__u8*)(from)), ((__u8*)(to)) + 4); \ + } + +/* + * get and set integers from potentially unaligned locations + */ + +#define INT_GET_UNALIGNED_16_LE(pointer) \ + ((__u16)((((__u8*)(pointer))[0] ) | (((__u8*)(pointer))[1] << 8 ))) +#define INT_GET_UNALIGNED_16_BE(pointer) \ + ((__u16)((((__u8*)(pointer))[0] << 8) | (((__u8*)(pointer))[1]))) +#define INT_SET_UNALIGNED_16_LE(pointer,value) \ + { \ + ((__u8*)(pointer))[0] = (((value) ) & 0xff); \ + ((__u8*)(pointer))[1] = (((value) >> 8) & 0xff); \ + } +#define INT_SET_UNALIGNED_16_BE(pointer,value) \ + { \ + ((__u8*)(pointer))[0] = (((value) >> 8) & 0xff); \ + ((__u8*)(pointer))[1] = (((value) ) & 0xff); \ + } + +#define INT_GET_UNALIGNED_32_LE(pointer) \ + ((__u32)((((__u8*)(pointer))[0] ) | (((__u8*)(pointer))[1] << 8 ) \ + |(((__u8*)(pointer))[2] << 16) | (((__u8*)(pointer))[3] << 24))) +#define INT_GET_UNALIGNED_32_BE(pointer) \ + ((__u32)((((__u8*)(pointer))[0] << 24) | (((__u8*)(pointer))[1] << 16) \ + |(((__u8*)(pointer))[2] << 8) | (((__u8*)(pointer))[3] ))) +#define INT_SET_UNALIGNED_32_LE(pointer, value) \ + { \ + INT_SET_UNALIGNED_16_LE(pointer, \ + ((value) & 0xffff)); \ + INT_SET_UNALIGNED_16_LE(((__u8*)(pointer))+2, \ + (((value) >> 16) & 0xffff) ); \ + } +#define INT_SET_UNALIGNED_32_BE(pointer, value) \ + { \ + INT_SET_UNALIGNED_16_BE(pointer, \ + (((value) >> 16) & 0xffff) ); \ + INT_SET_UNALIGNED_16_BE(((__u8*)(pointer))+2, \ + ((value) & 0xffff) ); \ + } + +#define INT_GET_UNALIGNED_64_LE(pointer) \ + (((__u64)(INT_GET_UNALIGNED_32_LE(((__u8*)(pointer))+4)) << 32 ) \ + |((__u64)(INT_GET_UNALIGNED_32_LE(((__u8*)(pointer)) )) )) +#define INT_GET_UNALIGNED_64_BE(pointer) \ + (((__u64)(INT_GET_UNALIGNED_32_BE(((__u8*)(pointer)) )) << 32 ) \ + |((__u64)(INT_GET_UNALIGNED_32_BE(((__u8*)(pointer))+4)) )) +#define INT_SET_UNALIGNED_64_LE(pointer, value) \ + { \ + INT_SET_UNALIGNED_32_LE(pointer, \ + ((value) & 0xffffffff)); \ + INT_SET_UNALIGNED_32_LE(((__u8*)(pointer))+4, \ + (((value) >> 32) & 0xffffffff) ); \ + } +#define INT_SET_UNALIGNED_64_BE(pointer, value) \ + { \ + INT_SET_UNALIGNED_32_BE(pointer, \ + (((value) >> 16) & 0xffff) ); \ + INT_SET_UNALIGNED_32_BE(((__u8*)(pointer))+4, \ + ((value) & 0xffff) ); \ + } + +/* + * now pick the right ones for our MACHINE ARCHITECTURE + */ + +#if __BYTE_ORDER == __LITTLE_ENDIAN +#define INT_GET_UNALIGNED_16(pointer) INT_GET_UNALIGNED_16_LE(pointer) +#define INT_SET_UNALIGNED_16(pointer,value) INT_SET_UNALIGNED_16_LE(pointer,value) +#define INT_GET_UNALIGNED_32(pointer) INT_GET_UNALIGNED_32_LE(pointer) +#define INT_SET_UNALIGNED_32(pointer,value) INT_SET_UNALIGNED_32_LE(pointer,value) +#define INT_GET_UNALIGNED_64(pointer) INT_GET_UNALIGNED_64_LE(pointer) +#define INT_SET_UNALIGNED_64(pointer,value) INT_SET_UNALIGNED_64_LE(pointer,value) +#else +#define INT_GET_UNALIGNED_16(pointer) INT_GET_UNALIGNED_16_BE(pointer) +#define INT_SET_UNALIGNED_16(pointer,value) INT_SET_UNALIGNED_16_BE(pointer,value) +#define INT_GET_UNALIGNED_32(pointer) INT_GET_UNALIGNED_32_BE(pointer) +#define INT_SET_UNALIGNED_32(pointer,value) INT_SET_UNALIGNED_32_BE(pointer,value) +#define INT_GET_UNALIGNED_64(pointer) INT_GET_UNALIGNED_64_BE(pointer) +#define INT_SET_UNALIGNED_64(pointer,value) INT_SET_UNALIGNED_64_BE(pointer,value) +#endif + +/* define generic INT_ macros */ + +#define INT_GET(reference,arch) \ + (((arch) == ARCH_NOCONVERT) \ + ? \ + (reference) \ + : \ + INT_SWAP((reference),(reference)) \ + ) + +/* does not return a value */ +#define INT_SET(reference,arch,valueref) \ + (__builtin_constant_p(valueref) ? \ + (void)( (reference) = ( ((arch) != ARCH_NOCONVERT) ? (INT_SWAP((reference),(valueref))) : (valueref)) ) : \ + (void)( \ + ((reference) = (valueref)), \ + ( ((arch) != ARCH_NOCONVERT) ? (reference) = INT_SWAP((reference),(reference)) : 0 ) \ + ) \ + ) + +/* does not return a value */ +#define INT_MOD_EXPR(reference,arch,code) \ + (void)(((arch) == ARCH_NOCONVERT) \ + ? \ + ((reference) code) \ + : \ + ( \ + (reference) = INT_GET((reference),arch) , \ + ((reference) code), \ + INT_SET(reference, arch, reference) \ + ) \ + ) + +/* does not return a value */ +#define INT_MOD(reference,arch,delta) \ + (void)( \ + INT_MOD_EXPR(reference,arch,+=(delta)) \ + ) + +/* + * INT_COPY - copy a value between two locations with the + * _same architecture_ but _potentially different sizes_ + * + * if the types of the two parameters are equal or they are + * in native architecture, a simple copy is done + * + * otherwise, architecture conversions are done + * + */ + +/* does not return a value */ +#define INT_COPY(dst,src,arch) \ + (void)( \ + ((sizeof(dst) == sizeof(src)) || ((arch) == ARCH_NOCONVERT)) \ + ? \ + ((dst) = (src)) \ + : \ + INT_SET(dst, arch, INT_GET(src, arch)) \ + ) + +/* + * INT_XLATE - copy a value in either direction between two locations + * with different architectures + * + * dir < 0 - copy from memory to buffer (native to arch) + * dir > 0 - copy from buffer to memory (arch to native) + */ + +/* does not return a value */ +#define INT_XLATE(buf,mem,dir,arch) {\ + ASSERT(dir); \ + if (dir>0) { \ + (mem)=INT_GET(buf, arch); \ + } else { \ + INT_SET(buf, arch, mem); \ + } \ +} + +#define INT_ISZERO(reference,arch) \ + ((reference) == 0) + +#define INT_ZERO(reference,arch) \ + ((reference) = 0) + +#define INT_GET_UNALIGNED_16_ARCH(pointer,arch) \ + ( ((arch) == ARCH_NOCONVERT) \ + ? \ + (INT_GET_UNALIGNED_16(pointer)) \ + : \ + (INT_GET_UNALIGNED_16_BE(pointer)) \ + ) +#define INT_SET_UNALIGNED_16_ARCH(pointer,value,arch) \ + if ((arch) == ARCH_NOCONVERT) { \ + INT_SET_UNALIGNED_16(pointer,value); \ + } else { \ + INT_SET_UNALIGNED_16_BE(pointer,value); \ + } + +#define INT_GET_UNALIGNED_64_ARCH(pointer,arch) \ + ( ((arch) == ARCH_NOCONVERT) \ + ? \ + (INT_GET_UNALIGNED_64(pointer)) \ + : \ + (INT_GET_UNALIGNED_64_BE(pointer)) \ + ) +#define INT_SET_UNALIGNED_64_ARCH(pointer,value,arch) \ + if ((arch) == ARCH_NOCONVERT) { \ + INT_SET_UNALIGNED_64(pointer,value); \ + } else { \ + INT_SET_UNALIGNED_64_BE(pointer,value); \ + } + +#define DIRINO4_GET_ARCH(pointer,arch) \ + ( ((arch) == ARCH_NOCONVERT) \ + ? \ + (INT_GET_UNALIGNED_32(pointer)) \ + : \ + (INT_GET_UNALIGNED_32_BE(pointer)) \ + ) + +#if XFS_BIG_INUMS +#define DIRINO_GET_ARCH(pointer,arch) \ + ( ((arch) == ARCH_NOCONVERT) \ + ? \ + (INT_GET_UNALIGNED_64(pointer)) \ + : \ + (INT_GET_UNALIGNED_64_BE(pointer)) \ + ) +#else +/* MACHINE ARCHITECTURE dependent */ +#if __BYTE_ORDER == __LITTLE_ENDIAN +#define DIRINO_GET_ARCH(pointer,arch) \ + DIRINO4_GET_ARCH((((__u8*)pointer)+4),arch) +#else +#define DIRINO_GET_ARCH(pointer,arch) \ + DIRINO4_GET_ARCH(pointer,arch) +#endif +#endif + +#define DIRINO_COPY_ARCH(from,to,arch) \ + if ((arch) == ARCH_NOCONVERT) { \ + memcpy(to,from,sizeof(xfs_ino_t)); \ + } else { \ + INT_SWAP_UNALIGNED_64(from,to); \ + } +#define DIRINO4_COPY_ARCH(from,to,arch) \ + if ((arch) == ARCH_NOCONVERT) { \ + memcpy(to,(((__u8*)from+4)),sizeof(xfs_dir2_ino4_t)); \ + } else { \ + INT_SWAP_UNALIGNED_32(from,to); \ + } + +#endif /* __XFS_ARCH_H__ */ + |
