1 #ifndef _ASM_POWERPC_FUTEX_H
2 #define _ASM_POWERPC_FUTEX_H
6 #include <linux/futex.h>
10 #include <asm/asm-compat.h>
12 #define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
13 __asm__ __volatile ( \
14 PPC_ATOMIC_ENTRY_BARRIER \
15 "1: lwarx %0,0,%2\n" \
18 "2: stwcx. %1,0,%2\n" \
20 PPC_ATOMIC_EXIT_BARRIER \
22 "3: .section .fixup,\"ax\"\n" \
26 ".section __ex_table,\"a\"\n" \
28 PPC_LONG "1b,4b,2b,4b\n" \
30 : "=&r" (oldval), "=&r" (ret) \
31 : "b" (uaddr), "i" (-EFAULT), "r" (oparg) \
36 int op = (encoded_op >> 28) & 7;
37 int cmp = (encoded_op >> 24) & 15;
38 int oparg = (encoded_op << 8) >> 20;
39 int cmparg = (encoded_op << 20) >> 20;
86 futex_atomic_cmpxchg_inatomic(
u32 *uval,
u32 __user *uaddr,
96 PPC_ATOMIC_ENTRY_BARRIER
97 "1: lwarx %1,0,%3 # futex_atomic_cmpxchg_inatomic\n\
101 "2: stwcx. %5,0,%3\n\
103 PPC_ATOMIC_EXIT_BARRIER
104 "3: .section .fixup,\"ax\"\n\
108 .section __ex_table,\"a\"\n\
112 :
"+r" (ret),
"=&r" (prev),
"+m" (*uaddr)
113 :
"r" (uaddr),
"r" (oldval),
"r" (newval),
"i" (-
EFAULT)