1 #ifndef _ASM_ALPHA_FUTEX_H
2 #define _ASM_ALPHA_FUTEX_H
6 #include <linux/futex.h>
7 #include <linux/uaccess.h>
9 #include <asm/barrier.h>
11 #define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
12 __asm__ __volatile__( \
14 "1: ldl_l %0,0(%2)\n" \
16 "2: stl_c %1,0(%2)\n" \
19 "3: .subsection 2\n" \
22 " .section __ex_table,\"a\"\n" \
24 " lda $31,3b-1b(%1)\n" \
26 " lda $31,3b-2b(%1)\n" \
28 : "=&r" (oldval), "=&r"(ret) \
29 : "r" (uaddr), "r"(oparg) \
32 static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
41 __futex_atomic_op("mov %3,%1\n", ret, oldval, uaddr, oparg);
44 __futex_atomic_op("addl %0,%3,%1\n", ret, oldval, uaddr, oparg);
47 __futex_atomic_op("or %0,%3,%1\n", ret, oldval, uaddr, oparg);
50 __futex_atomic_op("andnot %0,%3,%1\n", ret, oldval, uaddr, oparg);
53 __futex_atomic_op("xor %0,%3,%1\n", ret, oldval, uaddr, oparg);
68 futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
69 u32 oldval, u32 newval)
74 if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
77 __asm__ __volatile__ (
88 " .section __ex_table,\"a\"\n"
90 " lda $31,3b-1b(%0)\n"
92 " lda $31,3b-2b(%0)\n"
94 : "+r"(ret), "=&r"(prev), "=&r"(cmp)
95 : "r"(uaddr), "r"((long)(int)oldval), "r"(newval)
102 #endif /* __KERNEL__ */
103 #endif /* _ASM_ALPHA_FUTEX_H */