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/*
* bitops.h --- Bitmap frobbing code. The byte swapping routines are
* also included here.
*
* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Library
* General Public License, version 2.
* %End-Header%
*/
extern int ext2fs_set_bit(unsigned int nr,void * addr);
extern int ext2fs_clear_bit(unsigned int nr, void * addr);
extern int ext2fs_test_bit(unsigned int nr, const void * addr);
extern void ext2fs_fast_set_bit(unsigned int nr,void * addr);
extern void ext2fs_fast_clear_bit(unsigned int nr, void * addr);
extern __u16 ext2fs_swab16(__u16 val);
extern __u32 ext2fs_swab32(__u32 val);
extern __u64 ext2fs_swab64(__u64 val);
#ifdef WORDS_BIGENDIAN
#define ext2fs_cpu_to_le64(x) ext2fs_swab64((x))
#define ext2fs_le64_to_cpu(x) ext2fs_swab64((x))
#define ext2fs_cpu_to_le32(x) ext2fs_swab32((x))
#define ext2fs_le32_to_cpu(x) ext2fs_swab32((x))
#define ext2fs_cpu_to_le16(x) ext2fs_swab16((x))
#define ext2fs_le16_to_cpu(x) ext2fs_swab16((x))
#define ext2fs_cpu_to_be64(x) ((__u64)(x))
#define ext2fs_be64_to_cpu(x) ((__u64)(x))
#define ext2fs_cpu_to_be32(x) ((__u32)(x))
#define ext2fs_be32_to_cpu(x) ((__u32)(x))
#define ext2fs_cpu_to_be16(x) ((__u16)(x))
#define ext2fs_be16_to_cpu(x) ((__u16)(x))
#else
#define ext2fs_cpu_to_le64(x) ((__u64)(x))
#define ext2fs_le64_to_cpu(x) ((__u64)(x))
#define ext2fs_cpu_to_le32(x) ((__u32)(x))
#define ext2fs_le32_to_cpu(x) ((__u32)(x))
#define ext2fs_cpu_to_le16(x) ((__u16)(x))
#define ext2fs_le16_to_cpu(x) ((__u16)(x))
#define ext2fs_cpu_to_be64(x) ext2fs_swab64((x))
#define ext2fs_be64_to_cpu(x) ext2fs_swab64((x))
#define ext2fs_cpu_to_be32(x) ext2fs_swab32((x))
#define ext2fs_be32_to_cpu(x) ext2fs_swab32((x))
#define ext2fs_cpu_to_be16(x) ext2fs_swab16((x))
#define ext2fs_be16_to_cpu(x) ext2fs_swab16((x))
#endif
/*
* EXT2FS bitmap manipulation routines.
*/
/* Support for sending warning messages from the inline subroutines */
extern const char *ext2fs_block_string;
extern const char *ext2fs_inode_string;
extern const char *ext2fs_mark_string;
extern const char *ext2fs_unmark_string;
extern const char *ext2fs_test_string;
extern void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg,
const char *description);
extern void ext2fs_warn_bitmap2(ext2fs_generic_bitmap bitmap,
int code, unsigned long arg);
extern int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
extern int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block);
extern int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
extern int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
extern int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode);
extern int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
extern void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block);
extern void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block);
extern int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block);
extern void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode);
extern void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode);
extern int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode);
extern blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap);
extern ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap);
extern blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap);
extern ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap);
extern void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num);
extern void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num);
extern int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num);
extern int ext2fs_test_inode_bitmap_range(ext2fs_inode_bitmap bitmap,
ino_t inode, int num);
extern void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num);
extern void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num);
extern int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num);
extern void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map);
/* These routines moved to gen_bitmap.c */
extern int ext2fs_mark_generic_bitmap(ext2fs_generic_bitmap bitmap,
__u32 bitno);
extern int ext2fs_unmark_generic_bitmap(ext2fs_generic_bitmap bitmap,
blk_t bitno);
extern int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap,
blk_t bitno);
extern int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num);
extern __u32 ext2fs_get_generic_bitmap_start(ext2fs_generic_bitmap bitmap);
extern __u32 ext2fs_get_generic_bitmap_end(ext2fs_generic_bitmap bitmap);
/*
* The inline routines themselves...
*
* If NO_INLINE_FUNCS is defined, then we won't try to do inline
* functions at all; they will be included as normal functions in
* inline.c
*/
#ifdef NO_INLINE_FUNCS
#if (defined(__GNUC__) && (defined(__i386__) || defined(__i486__) || \
defined(__i586__) || defined(__mc68000__)))
/* This prevents bitops.c from trying to include the C */
/* function version of these functions */
#define _EXT2_HAVE_ASM_BITOPS_
#endif
#endif /* NO_INLINE_FUNCS */
#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
#ifdef INCLUDE_INLINE_FUNCS
#define _INLINE_ extern
#else
#ifdef __GNUC__
#define _INLINE_ extern __inline__
#else /* For Watcom C */
#define _INLINE_ extern inline
#endif
#endif
/*
* Fast bit set/clear functions that doesn't need to return the
* previous bit value.
*/
_INLINE_ void ext2fs_fast_set_bit(unsigned int nr,void * addr)
{
unsigned char *ADDR = (unsigned char *) addr;
ADDR += nr >> 3;
*ADDR |= (1 << (nr & 0x07));
}
_INLINE_ void ext2fs_fast_clear_bit(unsigned int nr, void * addr)
{
unsigned char *ADDR = (unsigned char *) addr;
ADDR += nr >> 3;
*ADDR &= ~(1 << (nr & 0x07));
}
#if ((defined __GNUC__) && !defined(_EXT2_USE_C_VERSIONS_) && \
(defined(__i386__) || defined(__i486__) || defined(__i586__)))
#define _EXT2_HAVE_ASM_BITOPS_
#define _EXT2_HAVE_ASM_SWAB_
/*
* These are done by inline assembly for speed reasons.....
*
* All bitoperations return 0 if the bit was cleared before the
* operation and != 0 if it was not. Bit 0 is the LSB of addr; bit 32
* is the LSB of (addr+1).
*/
/*
* Some hacks to defeat gcc over-optimizations..
*/
struct __dummy_h { unsigned long a[100]; };
#define EXT2FS_ADDR (*(struct __dummy_h *) addr)
#define EXT2FS_CONST_ADDR (*(const struct __dummy_h *) addr)
_INLINE_ int ext2fs_set_bit(unsigned int nr, void * addr)
{
int oldbit;
addr = (void *) (((unsigned char *) addr) + (nr >> 3));
__asm__ __volatile__("btsl %2,%1\n\tsbbl %0,%0"
:"=r" (oldbit),"+m" (EXT2FS_ADDR)
:"r" (nr & 7));
return oldbit;
}
_INLINE_ int ext2fs_clear_bit(unsigned int nr, void * addr)
{
int oldbit;
addr = (void *) (((unsigned char *) addr) + (nr >> 3));
__asm__ __volatile__("btrl %2,%1\n\tsbbl %0,%0"
:"=r" (oldbit),"+m" (EXT2FS_ADDR)
:"r" (nr & 7));
return oldbit;
}
_INLINE_ int ext2fs_test_bit(unsigned int nr, const void * addr)
{
int oldbit;
addr = (const void *) (((const unsigned char *) addr) + (nr >> 3));
__asm__ __volatile__("btl %2,%1\n\tsbbl %0,%0"
:"=r" (oldbit)
:"m" (EXT2FS_CONST_ADDR),"r" (nr & 7));
return oldbit;
}
_INLINE_ __u32 ext2fs_swab32(__u32 val)
{
#ifdef EXT2FS_REQUIRE_486
__asm__("bswap %0" : "=r" (val) : "0" (val));
#else
__asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
"rorl $16,%0\n\t" /* swap words */
"xchgb %b0,%h0" /* swap higher bytes */
:"=q" (val)
: "0" (val));
#endif
return val;
}
_INLINE_ __u16 ext2fs_swab16(__u16 val)
{
__asm__("xchgb %b0,%h0" /* swap bytes */ \
: "=q" (val) \
: "0" (val)); \
return val;
}
#undef EXT2FS_ADDR
#endif /* i386 */
#if ((defined __GNUC__) && !defined(_EXT2_USE_C_VERSIONS_) && \
(defined(__mc68000__)))
#define _EXT2_HAVE_ASM_BITOPS_
_INLINE_ int ext2fs_set_bit(unsigned int nr,void * addr)
{
char retval;
__asm__ __volatile__ ("bfset %2@{%1:#1}; sne %0"
: "=d" (retval) : "d" (nr^7), "a" (addr));
return retval;
}
_INLINE_ int ext2fs_clear_bit(unsigned int nr, void * addr)
{
char retval;
__asm__ __volatile__ ("bfclr %2@{%1:#1}; sne %0"
: "=d" (retval) : "d" (nr^7), "a" (addr));
return retval;
}
_INLINE_ int ext2fs_test_bit(unsigned int nr, const void * addr)
{
char retval;
__asm__ __volatile__ ("bftst %2@{%1:#1}; sne %0"
: "=d" (retval) : "d" (nr^7), "a" (addr));
return retval;
}
#endif /* __mc68000__ */
#if !defined(_EXT2_HAVE_ASM_SWAB_)
_INLINE_ __u16 ext2fs_swab16(__u16 val)
{
return (val >> 8) | (val << 8);
}
_INLINE_ __u32 ext2fs_swab32(__u32 val)
{
return ((val>>24) | ((val>>8)&0xFF00) |
((val<<8)&0xFF0000) | (val<<24));
}
#endif /* !_EXT2_HAVE_ASM_SWAB */
_INLINE_ __u64 ext2fs_swab64(__u64 val)
{
return (ext2fs_swab32(val >> 32) |
(((__u64)ext2fs_swab32(val & 0xFFFFFFFFUL)) << 32));
}
_INLINE_ int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block)
{
return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
block);
}
_INLINE_ int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block)
{
return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
block);
}
_INLINE_ int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block)
{
return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
block);
}
_INLINE_ int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode)
{
return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
inode);
}
_INLINE_ int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode)
{
return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
inode);
}
_INLINE_ int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode)
{
return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
inode);
}
_INLINE_ void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block)
{
ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap, block);
}
_INLINE_ void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block)
{
ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap, block);
}
_INLINE_ int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block)
{
return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
block);
}
_INLINE_ void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode)
{
ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap, inode);
}
_INLINE_ void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode)
{
ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap, inode);
}
_INLINE_ int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode)
{
return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
inode);
}
_INLINE_ blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap)
{
return ext2fs_get_generic_bitmap_start((ext2fs_generic_bitmap) bitmap);
}
_INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap)
{
return ext2fs_get_generic_bitmap_start((ext2fs_generic_bitmap) bitmap);
}
_INLINE_ blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap)
{
return ext2fs_get_generic_bitmap_end((ext2fs_generic_bitmap) bitmap);
}
_INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap)
{
return ext2fs_get_generic_bitmap_end((ext2fs_generic_bitmap) bitmap);
}
_INLINE_ int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num)
{
return ext2fs_test_block_bitmap_range(bitmap, block, num);
}
_INLINE_ void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num)
{
ext2fs_mark_block_bitmap_range(bitmap, block, num);
}
_INLINE_ void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
blk_t block, int num)
{
ext2fs_unmark_block_bitmap_range(bitmap, block, num);
}
#undef _INLINE_
#endif
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