1 #ifndef __ASM_OPENRISC_FUTEX_H
2 #define __ASM_OPENRISC_FUTEX_H
6 #include <linux/futex.h>
7 #include <linux/uaccess.h>
10 #define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
12 __asm__ __volatile__ ( \
13 "1: l.lwa %0, %2 \n" \
15 "2: l.swa %2, %1 \n" \
17 " l.ori %1, r0, 0 \n" \
19 ".section .fixup,\"ax\" \n" \
21 " l.addi %1, r0, %3 \n" \
23 ".section __ex_table,\"a\" \n" \
24 ".word 1b,4b,2b,4b \n" \
26 : "=&r" (oldval), "=&r" (ret), "+m" (*uaddr) \
27 : "i" (-EFAULT), "r" (oparg) \
33 arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
41 __futex_atomic_op("l.or %1,%4,%4", ret, oldval, uaddr, oparg);
44 __futex_atomic_op("l.add %1,%0,%4", ret, oldval, uaddr, oparg);
47 __futex_atomic_op("l.or %1,%0,%4", ret, oldval, uaddr, oparg);
50 __futex_atomic_op("l.and %1,%0,%4", ret, oldval, uaddr, ~oparg);
53 __futex_atomic_op("l.xor %1,%0,%4", 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__ ( \
78 "1: l.lwa %1, %2 \n" \
82 "2: l.swa %2, %4 \n" \
86 ".section .fixup,\"ax\" \n" \
88 " l.addi %0, r0, %5 \n" \
90 ".section __ex_table,\"a\" \n" \
91 ".word 1b,4b,2b,4b \n" \
93 : "+r" (ret), "=&r" (prev), "+m" (*uaddr) \
94 : "r" (oldval), "r" (newval), "i" (-EFAULT) \
102 #endif /* __KERNEL__ */
104 #endif /* __ASM_OPENRISC_FUTEX_H */