From 0b135cfc2e524dc249b75057b55dd4cc09842e27 Mon Sep 17 00:00:00 2001 From: Nobuhiro Iwamatsu Date: Sun, 13 May 2007 20:58:00 +0900 Subject: sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu --- include/asm-sh/bitops.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 include/asm-sh/bitops.h (limited to 'include/asm-sh/bitops.h') diff --git a/include/asm-sh/bitops.h b/include/asm-sh/bitops.h new file mode 100644 index 0000000..44dca9f --- /dev/null +++ b/include/asm-sh/bitops.h @@ -0,0 +1,13 @@ +#ifndef __ASM_SH_BITOPS_H_ +#define __ASM_SH_BITOPS_H_ + +extern void set_bit(int nr, volatile void * a); +extern void clear_bit(int nr, volatile void * a); +extern int test_and_clear_bit(int nr, volatile void * a); +extern void change_bit(unsigned long nr, volatile void *addr); +extern int test_and_set_bit(int nr, volatile void * a); +extern int test_and_change_bit(int nr, volatile void * addr); +extern int test_bit(int nr, volatile void * a); +extern int ffs(int i); + +#endif -- cgit v1.1 From b02bad128669e567fce87d8df823b06a0144b8db Mon Sep 17 00:00:00 2001 From: Nobuhiro Iwamatsu Date: Sun, 23 Sep 2007 02:12:30 +0900 Subject: sh: Update core code of SuperH. Signed-off-by: Nobuhiro Iwamatsu --- include/asm-sh/bitops.h | 175 +++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 164 insertions(+), 11 deletions(-) (limited to 'include/asm-sh/bitops.h') diff --git a/include/asm-sh/bitops.h b/include/asm-sh/bitops.h index 44dca9f..529d0f2 100644 --- a/include/asm-sh/bitops.h +++ b/include/asm-sh/bitops.h @@ -1,13 +1,166 @@ -#ifndef __ASM_SH_BITOPS_H_ -#define __ASM_SH_BITOPS_H_ - -extern void set_bit(int nr, volatile void * a); -extern void clear_bit(int nr, volatile void * a); -extern int test_and_clear_bit(int nr, volatile void * a); -extern void change_bit(unsigned long nr, volatile void *addr); -extern int test_and_set_bit(int nr, volatile void * a); -extern int test_and_change_bit(int nr, volatile void * addr); -extern int test_bit(int nr, volatile void * a); -extern int ffs(int i); +#ifndef __ASM_SH_BITOPS_H +#define __ASM_SH_BITOPS_H +#ifdef __KERNEL__ +//#include +#include +/* For __swab32 */ +#include + +static inline void set_bit(int nr, volatile void * addr) +{ + int mask; + volatile unsigned int *a = addr; + unsigned long flags; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + *a |= mask; + local_irq_restore(flags); +} + +/* + * clear_bit() doesn't provide any barrier for the compiler. + */ +#define smp_mb__before_clear_bit() barrier() +#define smp_mb__after_clear_bit() barrier() +static inline void clear_bit(int nr, volatile void * addr) +{ + int mask; + volatile unsigned int *a = addr; + unsigned long flags; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + *a &= ~mask; + local_irq_restore(flags); +} + +static inline void change_bit(int nr, volatile void * addr) +{ + int mask; + volatile unsigned int *a = addr; + unsigned long flags; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + *a ^= mask; + local_irq_restore(flags); +} + +static inline int test_and_set_bit(int nr, volatile void * addr) +{ + int mask, retval; + volatile unsigned int *a = addr; + unsigned long flags; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + retval = (mask & *a) != 0; + *a |= mask; + local_irq_restore(flags); + + return retval; +} + +static inline int test_and_clear_bit(int nr, volatile void * addr) +{ + int mask, retval; + volatile unsigned int *a = addr; + unsigned long flags; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + retval = (mask & *a) != 0; + *a &= ~mask; + local_irq_restore(flags); + + return retval; +} + +static inline int test_and_change_bit(int nr, volatile void * addr) +{ + int mask, retval; + volatile unsigned int *a = addr; + unsigned long flags; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + retval = (mask & *a) != 0; + *a ^= mask; + local_irq_restore(flags); + + return retval; +} + +//#include + +static inline unsigned long ffz(unsigned long word) +{ + unsigned long result; + + __asm__("1:\n\t" + "shlr %1\n\t" + "bt/s 1b\n\t" + " add #1, %0" + : "=r" (result), "=r" (word) + : "0" (~0L), "1" (word) + : "t"); + return result; +} + +/** + * ffs - find first bit in word. + * @word: The word to search + * + * Undefined if no bit exists, so code should check against 0 first. + */ +static 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; +} + +#if 0 +#include +#include +#include +#include +#include +#include +#include +#include +#include #endif +#endif /* __KERNEL__ */ + +#endif /* __ASM_SH_BITOPS_H */ -- cgit v1.1 From 61fb15c516fef5631e305f1976d7b3a679725856 Mon Sep 17 00:00:00 2001 From: Wolfgang Denk Date: Thu, 27 Dec 2007 01:52:50 +0100 Subject: Fix coding style issues; update CHANGELOG. Signed-off-by: Wolfgang Denk --- include/asm-sh/bitops.h | 67 +++++++++++++++++++------------------------------ 1 file changed, 26 insertions(+), 41 deletions(-) (limited to 'include/asm-sh/bitops.h') diff --git a/include/asm-sh/bitops.h b/include/asm-sh/bitops.h index 529d0f2..410fba4 100644 --- a/include/asm-sh/bitops.h +++ b/include/asm-sh/bitops.h @@ -2,7 +2,6 @@ #define __ASM_SH_BITOPS_H #ifdef __KERNEL__ -//#include #include /* For __swab32 */ #include @@ -99,8 +98,6 @@ static inline int test_and_change_bit(int nr, volatile void * addr) return retval; } -//#include - static inline unsigned long ffz(unsigned long word) { unsigned long result; @@ -121,46 +118,34 @@ static inline unsigned long ffz(unsigned long word) * * Undefined if no bit exists, so code should check against 0 first. */ -static inline int ffs(int x) +static 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; + 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; } - -#if 0 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#endif #endif /* __KERNEL__ */ #endif /* __ASM_SH_BITOPS_H */ -- cgit v1.1