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Diffstat (limited to 'include/asm-powerpc/futex.h')
-rw-r--r--include/asm-powerpc/futex.h117
1 files changed, 0 insertions, 117 deletions
diff --git a/include/asm-powerpc/futex.h b/include/asm-powerpc/futex.h
deleted file mode 100644
index 6d406c5c5de4..000000000000
--- a/include/asm-powerpc/futex.h
+++ /dev/null
@@ -1,117 +0,0 @@
-#ifndef _ASM_POWERPC_FUTEX_H
-#define _ASM_POWERPC_FUTEX_H
-
-#ifdef __KERNEL__
-
-#include <linux/futex.h>
-#include <linux/uaccess.h>
-#include <asm/errno.h>
-#include <asm/synch.h>
-#include <asm/asm-compat.h>
-
-#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
- __asm__ __volatile ( \
- LWSYNC_ON_SMP \
-"1: lwarx %0,0,%2\n" \
- insn \
- PPC405_ERR77(0, %2) \
-"2: stwcx. %1,0,%2\n" \
- "bne- 1b\n" \
- "li %1,0\n" \
-"3: .section .fixup,\"ax\"\n" \
-"4: li %1,%3\n" \
- "b 3b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- ".align 3\n" \
- PPC_LONG "1b,4b,2b,4b\n" \
- ".previous" \
- : "=&r" (oldval), "=&r" (ret) \
- : "b" (uaddr), "i" (-EFAULT), "1" (oparg) \
- : "cr0", "memory")
-
-static inline int futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
-{
- int op = (encoded_op >> 28) & 7;
- int cmp = (encoded_op >> 24) & 15;
- int oparg = (encoded_op << 8) >> 20;
- int cmparg = (encoded_op << 20) >> 20;
- int oldval = 0, ret;
- if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
- oparg = 1 << oparg;
-
- if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))
- return -EFAULT;
-
- pagefault_disable();
-
- switch (op) {
- case FUTEX_OP_SET:
- __futex_atomic_op("", ret, oldval, uaddr, oparg);
- break;
- case FUTEX_OP_ADD:
- __futex_atomic_op("add %1,%0,%1\n", ret, oldval, uaddr, oparg);
- break;
- case FUTEX_OP_OR:
- __futex_atomic_op("or %1,%0,%1\n", ret, oldval, uaddr, oparg);
- break;
- case FUTEX_OP_ANDN:
- __futex_atomic_op("andc %1,%0,%1\n", ret, oldval, uaddr, oparg);
- break;
- case FUTEX_OP_XOR:
- __futex_atomic_op("xor %1,%0,%1\n", ret, oldval, uaddr, oparg);
- break;
- default:
- ret = -ENOSYS;
- }
-
- pagefault_enable();
-
- if (!ret) {
- switch (cmp) {
- case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
- case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
- case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
- case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
- case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
- case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
- default: ret = -ENOSYS;
- }
- }
- return ret;
-}
-
-static inline int
-futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
-{
- int prev;
-
- if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
- return -EFAULT;
-
- __asm__ __volatile__ (
- LWSYNC_ON_SMP
-"1: lwarx %0,0,%2 # futex_atomic_cmpxchg_inatomic\n\
- cmpw 0,%0,%3\n\
- bne- 3f\n"
- PPC405_ERR77(0,%2)
-"2: stwcx. %4,0,%2\n\
- bne- 1b\n"
- ISYNC_ON_SMP
-"3: .section .fixup,\"ax\"\n\
-4: li %0,%5\n\
- b 3b\n\
- .previous\n\
- .section __ex_table,\"a\"\n\
- .align 3\n\
- " PPC_LONG "1b,4b,2b,4b\n\
- .previous" \
- : "=&r" (prev), "+m" (*uaddr)
- : "r" (uaddr), "r" (oldval), "r" (newval), "i" (-EFAULT)
- : "cc", "memory");
-
- return prev;
-}
-
-#endif /* __KERNEL__ */
-#endif /* _ASM_POWERPC_FUTEX_H */