#include <linux/kernel.h>
#include <asm/segment.h>
-#include <asm/alternative.h>
+#include <asm/cmpxchg.h>
#ifdef __KERNEL__
[threadrsp] "i" (offsetof(struct task_struct, thread.rsp)), \
[ti_flags] "i" (offsetof(struct thread_info, flags)),\
[tif_fork] "i" (TIF_FORK), \
- [thread_info] "i" (offsetof(struct task_struct, thread_info)), \
+ [thread_info] "i" (offsetof(struct task_struct, stack)), \
[pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent)) \
: "memory", "cc" __EXTRA_CLOBBER)
unsigned long cr0;
asm volatile("movq %%cr0,%0" : "=r" (cr0));
return cr0;
-}
+}
static inline void write_cr0(unsigned long val)
{
asm volatile("movq %0,%%cr0" :: "r" (val));
-}
+}
+
+static inline unsigned long read_cr2(void)
+{
+ unsigned long cr2;
+ asm("movq %%cr2,%0" : "=r" (cr2));
+ return cr2;
+}
+
+static inline void write_cr2(unsigned long val)
+{
+ asm volatile("movq %0,%%cr2" :: "r" (val));
+}
static inline unsigned long read_cr3(void)
{
unsigned long cr3;
asm("movq %%cr3,%0" : "=r" (cr3));
return cr3;
-}
+}
static inline void write_cr3(unsigned long val)
{
unsigned long cr4;
asm("movq %%cr4,%0" : "=r" (cr4));
return cr4;
-}
+}
static inline void write_cr4(unsigned long val)
{
asm volatile("movq %0,%%cr4" :: "r" (val) : "memory");
-}
-
-#define stts() write_cr0(8 | read_cr0())
-
-#define wbinvd() \
- __asm__ __volatile__ ("wbinvd": : :"memory");
-
-/*
- * On SMP systems, when the scheduler does migration-cost autodetection,
- * it needs a way to flush as much of the CPU's caches as possible.
- */
-static inline void sched_cacheflush(void)
-{
- wbinvd();
}
-#endif /* __KERNEL__ */
-
-#define nop() __asm__ __volatile__ ("nop")
-
-#define xchg(ptr,v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v),(ptr),sizeof(*(ptr))))
-
-#define tas(ptr) (xchg((ptr),1))
-
-#define __xg(x) ((volatile long *)(x))
-
-static inline void set_64bit(volatile unsigned long *ptr, unsigned long val)
+static inline unsigned long read_cr8(void)
{
- *ptr = val;
+ unsigned long cr8;
+ asm("movq %%cr8,%0" : "=r" (cr8));
+ return cr8;
}
-#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)
+static inline void write_cr8(unsigned long val)
{
- 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;
+ asm volatile("movq %0,%%cr8" :: "r" (val) : "memory");
}
-/*
- * 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 stts() write_cr0(8 | read_cr0())
-#define __HAVE_ARCH_CMPXCHG 1
+#define wbinvd() \
+ __asm__ __volatile__ ("wbinvd": : :"memory")
-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;
-}
+#endif /* __KERNEL__ */
-#define cmpxchg(ptr,o,n)\
- ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
- (unsigned long)(n),sizeof(*(ptr))))
+#define nop() __asm__ __volatile__ ("nop")
#ifdef CONFIG_SMP
#define smp_mb() mb()