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author | Minkyu Kang <mk7.kang@samsung.com> | 2010-04-19 10:26:18 +0900 |
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committer | Minkyu Kang <mk7.kang@samsung.com> | 2010-04-19 10:26:18 +0900 |
commit | 83653121d7382fccfe329cb732f77f116341ef1d (patch) | |
tree | 0b1ce6764252af15dfb2614372de98a44a7ec61f /arch/m68k/include/asm/bitops.h | |
parent | 0f1f21a345e02a68ec16f7ab9e7dc687f9276089 (diff) | |
parent | 07739bcef5da07cc4a4edef8b91014ccc332eda3 (diff) | |
download | u-boot-imx-83653121d7382fccfe329cb732f77f116341ef1d.zip u-boot-imx-83653121d7382fccfe329cb732f77f116341ef1d.tar.gz u-boot-imx-83653121d7382fccfe329cb732f77f116341ef1d.tar.bz2 |
Merge branch 'master' of git://git.denx.de/u-boot-arm
Conflicts:
cpu/arm1176/cpu.c
cpu/arm1176/start.S
cpu/arm_cortexa8/s5pc1xx/Makefile
cpu/arm_cortexa8/s5pc1xx/clock.c
drivers/serial/serial_s5p.c
include/asm-arm/arch-s5pc1xx/clk.h
include/asm-arm/arch-s5pc1xx/gpio.h
include/asm-arm/arch-s5pc1xx/uart.h
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'arch/m68k/include/asm/bitops.h')
-rw-r--r-- | arch/m68k/include/asm/bitops.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h new file mode 100644 index 0000000..ad971b4 --- /dev/null +++ b/arch/m68k/include/asm/bitops.h @@ -0,0 +1,58 @@ +/* + * bitops.h: Bit string operations on the m68k + */ + +#ifndef _M68K_BITOPS_H +#define _M68K_BITOPS_H + +#include <linux/config.h> +#include <asm/byteorder.h> + +extern void set_bit(int nr, volatile void *addr); +extern void clear_bit(int nr, volatile void *addr); +extern void change_bit(int nr, volatile void *addr); +extern int test_and_set_bit(int nr, volatile void *addr); +extern int test_and_clear_bit(int nr, volatile void *addr); +extern int test_and_change_bit(int nr, volatile void *addr); + +#ifdef __KERNEL__ + +/* + * ffs: find first bit set. This is defined the same way as + * the libc and compiler builtin ffs routines, therefore + * differs in spirit from the above ffz (man ffs). + */ +extern __inline__ int ffs(int x) +{ + int r = 1; + + if (!x) + return 0; + if (!(x & 0xffff)) { + x >>= 16; + r += 16; + } + if (!(x & 0xff)) { + x >>= 8; + r += 8; + } + if (!(x & 0xf)) { + x >>= 4; + r += 4; + } + if (!(x & 3)) { + x >>= 2; + r += 2; + } + if (!(x & 1)) { + x >>= 1; + r += 1; + } + return r; +} +#define __ffs(x) (ffs(x) - 1) +#define PLATFORM_FFS + +#endif /* __KERNEL__ */ + +#endif /* _M68K_BITOPS_H */ |