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Diffstat (limited to 'include/asm-alpha/bitops.h')
| -rw-r--r-- | include/asm-alpha/bitops.h | 466 |
1 files changed, 0 insertions, 466 deletions
diff --git a/include/asm-alpha/bitops.h b/include/asm-alpha/bitops.h deleted file mode 100644 index 15f3ae2..0000000 --- a/include/asm-alpha/bitops.h +++ /dev/null @@ -1,466 +0,0 @@ -#ifndef _ALPHA_BITOPS_H -#define _ALPHA_BITOPS_H - -#ifndef _LINUX_BITOPS_H -#error only <linux/bitops.h> can be included directly -#endif - -#include <asm/compiler.h> -#include <asm/barrier.h> - -/* - * Copyright 1994, Linus Torvalds. - */ - -/* - * These have to be done with inline assembly: that way the bit-setting - * is guaranteed to be atomic. All bit operations return 0 if the bit - * was cleared before the operation and != 0 if it was not. - * - * To get proper branch prediction for the main line, we must branch - * forward to code at the end of this object's .text section, then - * branch back to restart the operation. - * - * bit 0 is the LSB of addr; bit 64 is the LSB of (addr+1). - */ - -static inline void -set_bit(unsigned long nr, volatile void * addr) -{ - unsigned long temp; - int *m = ((int *) addr) + (nr >> 5); - - __asm__ __volatile__( - "1: ldl_l %0,%3\n" - " bis %0,%2,%0\n" - " stl_c %0,%1\n" - " beq %0,2f\n" - ".subsection 2\n" - "2: br 1b\n" - ".previous" - :"=&r" (temp), "=m" (*m) - :"Ir" (1UL << (nr & 31)), "m" (*m)); -} - -/* - * WARNING: non atomic version. - */ -static inline void -__set_bit(unsigned long nr, volatile void * addr) -{ - int *m = ((int *) addr) + (nr >> 5); - - *m |= 1 << (nr & 31); -} - -#define smp_mb__before_clear_bit() smp_mb() -#define smp_mb__after_clear_bit() smp_mb() - -static inline void -clear_bit(unsigned long nr, volatile void * addr) -{ - unsigned long temp; - int *m = ((int *) addr) + (nr >> 5); - - __asm__ __volatile__( - "1: ldl_l %0,%3\n" - " bic %0,%2,%0\n" - " stl_c %0,%1\n" - " beq %0,2f\n" - ".subsection 2\n" - "2: br 1b\n" - ".previous" - :"=&r" (temp), "=m" (*m) - :"Ir" (1UL << (nr & 31)), "m" (*m)); -} - -static inline void -clear_bit_unlock(unsigned long nr, volatile void * addr) -{ - smp_mb(); - clear_bit(nr, addr); -} - -/* - * WARNING: non atomic version. - */ -static __inline__ void -__clear_bit(unsigned long nr, volatile void * addr) -{ - int *m = ((int *) addr) + (nr >> 5); - - *m &= ~(1 << (nr & 31)); -} - -static inline void -__clear_bit_unlock(unsigned long nr, volatile void * addr) -{ - smp_mb(); - __clear_bit(nr, addr); -} - -static inline void -change_bit(unsigned long nr, volatile void * addr) -{ - unsigned long temp; - int *m = ((int *) addr) + (nr >> 5); - - __asm__ __volatile__( - "1: ldl_l %0,%3\n" - " xor %0,%2,%0\n" - " stl_c %0,%1\n" - " beq %0,2f\n" - ".subsection 2\n" - "2: br 1b\n" - ".previous" - :"=&r" (temp), "=m" (*m) - :"Ir" (1UL << (nr & 31)), "m" (*m)); -} - -/* - * WARNING: non atomic version. - */ -static __inline__ void -__change_bit(unsigned long nr, volatile void * addr) -{ - int *m = ((int *) addr) + (nr >> 5); - - *m ^= 1 << (nr & 31); -} - -static inline int -test_and_set_bit(unsigned long nr, volatile void *addr) -{ - unsigned long oldbit; - unsigned long temp; - int *m = ((int *) addr) + (nr >> 5); - - __asm__ __volatile__( -#ifdef CONFIG_SMP - " mb\n" -#endif - "1: ldl_l %0,%4\n" - " and %0,%3,%2\n" - " bne %2,2f\n" - " xor %0,%3,%0\n" - " stl_c %0,%1\n" - " beq %0,3f\n" - "2:\n" -#ifdef CONFIG_SMP - " mb\n" -#endif - ".subsection 2\n" - "3: br 1b\n" - ".previous" - :"=&r" (temp), "=m" (*m), "=&r" (oldbit) - :"Ir" (1UL << (nr & 31)), "m" (*m) : "memory"); - - return oldbit != 0; -} - -static inline int -test_and_set_bit_lock(unsigned long nr, volatile void *addr) -{ - unsigned long oldbit; - unsigned long temp; - int *m = ((int *) addr) + (nr >> 5); - - __asm__ __volatile__( - "1: ldl_l %0,%4\n" - " and %0,%3,%2\n" - " bne %2,2f\n" - " xor %0,%3,%0\n" - " stl_c %0,%1\n" - " beq %0,3f\n" - "2:\n" -#ifdef CONFIG_SMP - " mb\n" -#endif - ".subsection 2\n" - "3: br 1b\n" - ".previous" - :"=&r" (temp), "=m" (*m), "=&r" (oldbit) - :"Ir" (1UL << (nr & 31)), "m" (*m) : "memory"); - - return oldbit != 0; -} - -/* - * WARNING: non atomic version. - */ -static inline int -__test_and_set_bit(unsigned long nr, volatile void * addr) -{ - unsigned long mask = 1 << (nr & 0x1f); - int *m = ((int *) addr) + (nr >> 5); - int old = *m; - - *m = old | mask; - return (old & mask) != 0; -} - -static inline int -test_and_clear_bit(unsigned long nr, volatile void * addr) -{ - unsigned long oldbit; - unsigned long temp; - int *m = ((int *) addr) + (nr >> 5); - - __asm__ __volatile__( -#ifdef CONFIG_SMP - " mb\n" -#endif - "1: ldl_l %0,%4\n" - " and %0,%3,%2\n" - " beq %2,2f\n" - " xor %0,%3,%0\n" - " stl_c %0,%1\n" - " beq %0,3f\n" - "2:\n" -#ifdef CONFIG_SMP - " mb\n" -#endif - ".subsection 2\n" - "3: br 1b\n" - ".previous" - :"=&r" (temp), "=m" (*m), "=&r" (oldbit) - :"Ir" (1UL << (nr & 31)), "m" (*m) : "memory"); - - return oldbit != 0; -} - -/* - * WARNING: non atomic version. - */ -static inline int -__test_and_clear_bit(unsigned long nr, volatile void * addr) -{ - unsigned long mask = 1 << (nr & 0x1f); - int *m = ((int *) addr) + (nr >> 5); - int old = *m; - - *m = old & ~mask; - return (old & mask) != 0; -} - -static inline int -test_and_change_bit(unsigned long nr, volatile void * addr) -{ - unsigned long oldbit; - unsigned long temp; - int *m = ((int *) addr) + (nr >> 5); - - __asm__ __volatile__( -#ifdef CONFIG_SMP - " mb\n" -#endif - "1: ldl_l %0,%4\n" - " and %0,%3,%2\n" - " xor %0,%3,%0\n" - " stl_c %0,%1\n" - " beq %0,3f\n" -#ifdef CONFIG_SMP - " mb\n" -#endif - ".subsection 2\n" - "3: br 1b\n" - ".previous" - :"=&r" (temp), "=m" (*m), "=&r" (oldbit) - :"Ir" (1UL << (nr & 31)), "m" (*m) : "memory"); - - return oldbit != 0; -} - -/* - * WARNING: non atomic version. - */ -static __inline__ int -__test_and_change_bit(unsigned long nr, volatile void * addr) -{ - unsigned long mask = 1 << (nr & 0x1f); - int *m = ((int *) addr) + (nr >> 5); - int old = *m; - - *m = old ^ mask; - return (old & mask) != 0; -} - -static inline int -test_bit(int nr, const volatile void * addr) -{ - return (1UL & (((const int *) addr)[nr >> 5] >> (nr & 31))) != 0UL; -} - -/* - * ffz = Find First Zero in word. Undefined if no zero exists, - * so code should check against ~0UL first.. - * - * Do a binary search on the bits. Due to the nature of large - * constants on the alpha, it is worthwhile to split the search. - */ -static inline unsigned long ffz_b(unsigned long x) -{ - unsigned long sum, x1, x2, x4; - - x = ~x & -~x; /* set first 0 bit, clear others */ - x1 = x & 0xAA; - x2 = x & 0xCC; - x4 = x & 0xF0; - sum = x2 ? 2 : 0; - sum += (x4 != 0) * 4; - sum += (x1 != 0); - - return sum; -} - -static inline unsigned long ffz(unsigned long word) -{ -#if defined(CONFIG_ALPHA_EV6) && defined(CONFIG_ALPHA_EV67) - /* Whee. EV67 can calculate it directly. */ - return __kernel_cttz(~word); -#else - unsigned long bits, qofs, bofs; - - bits = __kernel_cmpbge(word, ~0UL); - qofs = ffz_b(bits); - bits = __kernel_extbl(word, qofs); - bofs = ffz_b(bits); - - return qofs*8 + bofs; -#endif -} - -/* - * __ffs = Find First set bit in word. Undefined if no set bit exists. - */ -static inline unsigned long __ffs(unsigned long word) -{ -#if defined(CONFIG_ALPHA_EV6) && defined(CONFIG_ALPHA_EV67) - /* Whee. EV67 can calculate it directly. */ - return __kernel_cttz(word); -#else - unsigned long bits, qofs, bofs; - - bits = __kernel_cmpbge(0, word); - qofs = ffz_b(bits); - bits = __kernel_extbl(word, qofs); - bofs = ffz_b(~bits); - - return qofs*8 + bofs; -#endif -} - -#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 __ffs. - */ - -static inline int ffs(int word) -{ - int result = __ffs(word) + 1; - return word ? result : 0; -} - -/* - * fls: find last bit set. - */ -#if defined(CONFIG_ALPHA_EV6) && defined(CONFIG_ALPHA_EV67) -static inline int fls64(unsigned long word) -{ - return 64 - __kernel_ctlz(word); -} -#else -extern const unsigned char __flsm1_tab[256]; - -static inline int fls64(unsigned long x) -{ - unsigned long t, a, r; - - t = __kernel_cmpbge (x, 0x0101010101010101UL); - a = __flsm1_tab[t]; - t = __kernel_extbl (x, a); - r = a*8 + __flsm1_tab[t] + (x != 0); - - return r; -} -#endif - -static inline unsigned long __fls(unsigned long x) -{ - return fls64(x) - 1; -} - -static inline int fls(int x) -{ - return fls64((unsigned int) x); -} - -/* - * hweightN: returns the hamming weight (i.e. the number - * of bits set) of a N-bit word - */ - -#if defined(CONFIG_ALPHA_EV6) && defined(CONFIG_ALPHA_EV67) -/* Whee. EV67 can calculate it directly. */ -static inline unsigned long hweight64(unsigned long w) -{ - return __kernel_ctpop(w); -} - -static inline unsigned int hweight32(unsigned int w) -{ - return hweight64(w); -} - -static inline unsigned int hweight16(unsigned int w) -{ - return hweight64(w & 0xffff); -} - -static inline unsigned int hweight8(unsigned int w) -{ - return hweight64(w & 0xff); -} -#else -#include <asm-generic/bitops/hweight.h> -#endif - -#endif /* __KERNEL__ */ - -#include <asm-generic/bitops/find.h> - -#ifdef __KERNEL__ - -/* - * Every architecture must define this function. It's the fastest - * way of searching a 140-bit bitmap where the first 100 bits are - * unlikely to be set. It's guaranteed that at least one of the 140 - * bits is set. - */ -static inline unsigned long -sched_find_first_bit(unsigned long b[3]) -{ - unsigned long b0 = b[0], b1 = b[1], b2 = b[2]; - unsigned long ofs; - - ofs = (b1 ? 64 : 128); - b1 = (b1 ? b1 : b2); - ofs = (b0 ? 0 : ofs); - b0 = (b0 ? b0 : b1); - - return __ffs(b0) + ofs; -} - -#include <asm-generic/bitops/ext2-non-atomic.h> - -#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a) -#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a) - -#include <asm-generic/bitops/minix.h> - -#endif /* __KERNEL__ */ - -#endif /* _ALPHA_BITOPS_H */ |