update: sync

[l4.git] / l4 / pkg / linux-26-headers / include / asm-x86 / cmpxchg_64.h

diff --git a/l4/pkg/linux-26-headers/include/asm-x86/cmpxchg_64.h b/l4/pkg/linux-26-headers/include/asm-x86/cmpxchg_64.h
deleted file mode 100644 (file)
index 17463cc..0000000
--- a/l4/pkg/linux-26-headers/include/asm-x86/cmpxchg_64.h
+++ /dev/null
@@ -1,185 +0,0 @@
-#ifndef __ASM_CMPXCHG_H
-#define __ASM_CMPXCHG_H
-
-#include <asm/alternative.h> /* Provides LOCK_PREFIX */
-
-#define xchg(ptr, v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v), \
-                                                (ptr), sizeof(*(ptr))))
-
-#define __xg(x) ((volatile long *)(x))
-
-static inline void set_64bit(volatile unsigned long *ptr, unsigned long val)
-{
-       *ptr = val;
-}
-
-#define _set_64bit set_64bit
-
-/*
- * Note: no "lock" prefix even on SMP: xchg always implies lock anyway
- * Note 2: xchg has side effect, so that attribute volatile is necessary,
- *       but generally the primitive is invalid, *ptr is output argument. --ANK
- */
-static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
-                                  int size)
-{
-       switch (size) {
-       case 1:
-               asm volatile("xchgb %b0,%1"
-                            : "=q" (x)
-                            : "m" (*__xg(ptr)), "0" (x)
-                            : "memory");
-               break;
-       case 2:
-               asm volatile("xchgw %w0,%1"
-                            : "=r" (x)
-                            : "m" (*__xg(ptr)), "0" (x)
-                            : "memory");
-               break;
-       case 4:
-               asm volatile("xchgl %k0,%1"
-                            : "=r" (x)
-                            : "m" (*__xg(ptr)), "0" (x)
-                            : "memory");
-               break;
-       case 8:
-               asm volatile("xchgq %0,%1"
-                            : "=r" (x)
-                            : "m" (*__xg(ptr)), "0" (x)
-                            : "memory");
-               break;
-       }
-       return x;
-}
-
-/*
- * Atomic compare and exchange.  Compare OLD with MEM, if identical,
- * store NEW in MEM.  Return the initial value in MEM.  Success is
- * indicated by comparing RETURN with OLD.
- */
-
-#define __HAVE_ARCH_CMPXCHG 1
-
-static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
-                                     unsigned long new, int size)
-{
-       unsigned long prev;
-       switch (size) {
-       case 1:
-               asm volatile(LOCK_PREFIX "cmpxchgb %b1,%2"
-                            : "=a"(prev)
-                            : "q"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       case 2:
-               asm volatile(LOCK_PREFIX "cmpxchgw %w1,%2"
-                            : "=a"(prev)
-                            : "r"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       case 4:
-               asm volatile(LOCK_PREFIX "cmpxchgl %k1,%2"
-                            : "=a"(prev)
-                            : "r"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       case 8:
-               asm volatile(LOCK_PREFIX "cmpxchgq %1,%2"
-                            : "=a"(prev)
-                            : "r"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       }
-       return old;
-}
-
-/*
- * Always use locked operations when touching memory shared with a
- * hypervisor, since the system may be SMP even if the guest kernel
- * isn't.
- */
-static inline unsigned long __sync_cmpxchg(volatile void *ptr,
-                                          unsigned long old,
-                                          unsigned long new, int size)
-{
-       unsigned long prev;
-       switch (size) {
-       case 1:
-               asm volatile("lock; cmpxchgb %b1,%2"
-                            : "=a"(prev)
-                            : "q"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       case 2:
-               asm volatile("lock; cmpxchgw %w1,%2"
-                            : "=a"(prev)
-                            : "r"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       case 4:
-               asm volatile("lock; cmpxchgl %1,%2"
-                            : "=a"(prev)
-                            : "r"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       }
-       return old;
-}
-
-static inline unsigned long __cmpxchg_local(volatile void *ptr,
-                                           unsigned long old,
-                                           unsigned long new, int size)
-{
-       unsigned long prev;
-       switch (size) {
-       case 1:
-               asm volatile("cmpxchgb %b1,%2"
-                            : "=a"(prev)
-                            : "q"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       case 2:
-               asm volatile("cmpxchgw %w1,%2"
-                            : "=a"(prev)
-                            : "r"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       case 4:
-               asm volatile("cmpxchgl %k1,%2"
-                            : "=a"(prev)
-                            : "r"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       case 8:
-               asm volatile("cmpxchgq %1,%2"
-                            : "=a"(prev)
-                            : "r"(new), "m"(*__xg(ptr)), "0"(old)
-                            : "memory");
-               return prev;
-       }
-       return old;
-}
-
-#define cmpxchg(ptr, o, n)                                             \
-       ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o),       \
-                                      (unsigned long)(n), sizeof(*(ptr))))
-#define cmpxchg64(ptr, o, n)                                           \
-({                                                                     \
-       BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
-       cmpxchg((ptr), (o), (n));                                       \
-})
-#define cmpxchg_local(ptr, o, n)                                       \
-       ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \
-                                            (unsigned long)(n),        \
-                                            sizeof(*(ptr))))
-#define sync_cmpxchg(ptr, o, n)                                                \
-       ((__typeof__(*(ptr)))__sync_cmpxchg((ptr), (unsigned long)(o),  \
-                                           (unsigned long)(n),         \
-                                           sizeof(*(ptr))))
-#define cmpxchg64_local(ptr, o, n)                                     \
-({                                                                     \
-       BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
-       cmpxchg_local((ptr), (o), (n));                                 \
-})
-
-#endif