mirror of
https://git.proxmox.com/git/mirror_ubuntu-kernels.git
synced 2025-11-08 15:30:18 +00:00
3eb3c33c1d
These are a few cross-architecture cleanup patches:
- Thomas Zimmermann works on separating fbdev support from the asm/video.h
contents that may be used by either the old fbdev drivers or the
newer drm display code.
- Thorsten Blum contributes cleanups for the generic bitops code
and asm-generic/bug.h
- I remove the orphaned include/asm-generic/page.h header that used to
included by long-removed mmu-less architectures.
-----BEGIN PGP SIGNATURE-----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=riCs
-----END PGP SIGNATURE-----
Merge tag 'asm-generic-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic cleanups from Arnd Bergmann:
"These are a few cross-architecture cleanup patches:
- separate out fbdev support from the asm/video.h contents that may
be used by either the old fbdev drivers or the newer drm display
code (Thomas Zimmermann)
- cleanups for the generic bitops code and asm-generic/bug.h
(Thorsten Blum)
- remove the orphaned include/asm-generic/page.h header that used to
be included by long-removed mmu-less architectures (me)"
* tag 'asm-generic-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
arch: Fix name collision with ACPI's video.o
bug: Improve comment
asm-generic: remove unused asm-generic/page.h
arch: Rename fbdev header and source files
arch: Remove struct fb_info from video helpers
arch: Select fbdev helpers with CONFIG_VIDEO
bitops: Change function return types from long to int
104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _TOOLS_LINUX_BITOPS_H_
|
|
#define _TOOLS_LINUX_BITOPS_H_
|
|
|
|
#include <asm/types.h>
|
|
#include <limits.h>
|
|
#ifndef __WORDSIZE
|
|
#define __WORDSIZE (__SIZEOF_LONG__ * 8)
|
|
#endif
|
|
|
|
#ifndef BITS_PER_LONG
|
|
# define BITS_PER_LONG __WORDSIZE
|
|
#endif
|
|
#include <linux/bits.h>
|
|
#include <linux/compiler.h>
|
|
|
|
#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
|
|
#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
|
|
#define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u64))
|
|
#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u32))
|
|
#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(char))
|
|
|
|
#define BYTES_TO_BITS(nb) ((nb) * BITS_PER_BYTE)
|
|
|
|
extern unsigned int __sw_hweight8(unsigned int w);
|
|
extern unsigned int __sw_hweight16(unsigned int w);
|
|
extern unsigned int __sw_hweight32(unsigned int w);
|
|
extern unsigned long __sw_hweight64(__u64 w);
|
|
|
|
/*
|
|
* Defined here because those may be needed by architecture-specific static
|
|
* inlines.
|
|
*/
|
|
|
|
#define bitop(op, nr, addr) \
|
|
op(nr, addr)
|
|
|
|
#define __set_bit(nr, addr) bitop(___set_bit, nr, addr)
|
|
#define __clear_bit(nr, addr) bitop(___clear_bit, nr, addr)
|
|
#define __change_bit(nr, addr) bitop(___change_bit, nr, addr)
|
|
#define __test_and_set_bit(nr, addr) bitop(___test_and_set_bit, nr, addr)
|
|
#define __test_and_clear_bit(nr, addr) bitop(___test_and_clear_bit, nr, addr)
|
|
#define __test_and_change_bit(nr, addr) bitop(___test_and_change_bit, nr, addr)
|
|
#define test_bit(nr, addr) bitop(_test_bit, nr, addr)
|
|
|
|
/*
|
|
* Include this here because some architectures need generic_ffs/fls in
|
|
* scope
|
|
*
|
|
* XXX: this needs to be asm/bitops.h, when we get to per arch optimizations
|
|
*/
|
|
#include <asm-generic/bitops.h>
|
|
|
|
#define for_each_set_bit(bit, addr, size) \
|
|
for ((bit) = find_first_bit((addr), (size)); \
|
|
(bit) < (size); \
|
|
(bit) = find_next_bit((addr), (size), (bit) + 1))
|
|
|
|
#define for_each_clear_bit(bit, addr, size) \
|
|
for ((bit) = find_first_zero_bit((addr), (size)); \
|
|
(bit) < (size); \
|
|
(bit) = find_next_zero_bit((addr), (size), (bit) + 1))
|
|
|
|
/* same as for_each_set_bit() but use bit as value to start with */
|
|
#define for_each_set_bit_from(bit, addr, size) \
|
|
for ((bit) = find_next_bit((addr), (size), (bit)); \
|
|
(bit) < (size); \
|
|
(bit) = find_next_bit((addr), (size), (bit) + 1))
|
|
|
|
static inline unsigned long hweight_long(unsigned long w)
|
|
{
|
|
return sizeof(w) == 4 ? hweight32(w) : hweight64(w);
|
|
}
|
|
|
|
static inline unsigned int fls_long(unsigned long l)
|
|
{
|
|
if (sizeof(l) == 4)
|
|
return fls(l);
|
|
return fls64(l);
|
|
}
|
|
|
|
/**
|
|
* rol32 - rotate a 32-bit value left
|
|
* @word: value to rotate
|
|
* @shift: bits to roll
|
|
*/
|
|
static inline __u32 rol32(__u32 word, unsigned int shift)
|
|
{
|
|
return (word << shift) | (word >> ((-shift) & 31));
|
|
}
|
|
|
|
/**
|
|
* sign_extend64 - sign extend a 64-bit value using specified bit as sign-bit
|
|
* @value: value to sign extend
|
|
* @index: 0 based bit index (0<=index<64) to sign bit
|
|
*/
|
|
static __always_inline __s64 sign_extend64(__u64 value, int index)
|
|
{
|
|
__u8 shift = 63 - index;
|
|
return (__s64)(value << shift) >> shift;
|
|
}
|
|
|
|
#endif
|