aboutsummaryrefslogtreecommitdiff
path: root/include/asm-ia64/futex.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-ia64/futex.h')
-rw-r--r--include/asm-ia64/futex.h124
1 files changed, 0 insertions, 124 deletions
diff --git a/include/asm-ia64/futex.h b/include/asm-ia64/futex.h
deleted file mode 100644
index c7f0f062239..00000000000
--- a/include/asm-ia64/futex.h
+++ /dev/null
@@ -1,124 +0,0 @@
-#ifndef _ASM_FUTEX_H
-#define _ASM_FUTEX_H
-
-#include <linux/futex.h>
-#include <linux/uaccess.h>
-#include <asm/errno.h>
-#include <asm/system.h>
-
-#define __futex_atomic_op1(insn, ret, oldval, uaddr, oparg) \
-do { \
- register unsigned long r8 __asm ("r8") = 0; \
- __asm__ __volatile__( \
- " mf;; \n" \
- "[1:] " insn ";; \n" \
- " .xdata4 \"__ex_table\", 1b-., 2f-. \n" \
- "[2:]" \
- : "+r" (r8), "=r" (oldval) \
- : "r" (uaddr), "r" (oparg) \
- : "memory"); \
- ret = r8; \
-} while (0)
-
-#define __futex_atomic_op2(insn, ret, oldval, uaddr, oparg) \
-do { \
- register unsigned long r8 __asm ("r8") = 0; \
- int val, newval; \
- do { \
- __asm__ __volatile__( \
- " mf;; \n" \
- "[1:] ld4 %3=[%4];; \n" \
- " mov %2=%3 \n" \
- insn ";; \n" \
- " mov ar.ccv=%2;; \n" \
- "[2:] cmpxchg4.acq %1=[%4],%3,ar.ccv;; \n" \
- " .xdata4 \"__ex_table\", 1b-., 3f-.\n" \
- " .xdata4 \"__ex_table\", 2b-., 3f-.\n" \
- "[3:]" \
- : "+r" (r8), "=r" (val), "=&r" (oldval), \
- "=&r" (newval) \
- : "r" (uaddr), "r" (oparg) \
- : "memory"); \
- if (unlikely (r8)) \
- break; \
- } while (unlikely (val != oldval)); \
- ret = r8; \
-} while (0)
-
-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_op1("xchg4 %1=[%2],%3", ret, oldval, uaddr,
- oparg);
- break;
- case FUTEX_OP_ADD:
- __futex_atomic_op2("add %3=%3,%5", ret, oldval, uaddr, oparg);
- break;
- case FUTEX_OP_OR:
- __futex_atomic_op2("or %3=%3,%5", ret, oldval, uaddr, oparg);
- break;
- case FUTEX_OP_ANDN:
- __futex_atomic_op2("and %3=%3,%5", ret, oldval, uaddr,
- ~oparg);
- break;
- case FUTEX_OP_XOR:
- __futex_atomic_op2("xor %3=%3,%5", 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)
-{
- if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
- return -EFAULT;
-
- {
- register unsigned long r8 __asm ("r8");
- __asm__ __volatile__(
- " mf;; \n"
- " mov ar.ccv=%3;; \n"
- "[1:] cmpxchg4.acq %0=[%1],%2,ar.ccv \n"
- " .xdata4 \"__ex_table\", 1b-., 2f-. \n"
- "[2:]"
- : "=r" (r8)
- : "r" (uaddr), "r" (newval),
- "rO" ((long) (unsigned) oldval)
- : "memory");
- return r8;
- }
-}
-
-#endif /* _ASM_FUTEX_H */