Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...

[linux-2.6] / include / asm-s390 / system.h

diff --git a/include/asm-s390/system.h b/include/asm-s390/system.h
index 44bda786eef7f11bf86ffc012f661e7c4e545c52..c819ae25a8425ddfd72136dda4d674bf0f8b0ac1 100644 (file)
--- a/include/asm-s390/system.h
+++ b/include/asm-s390/system.h
@@ -16,6 +16,7 @@
 #include <asm/ptrace.h>
 #include <asm/setup.h>
 #include <asm/processor.h>
+#include <asm/lowcore.h>
 
 #ifdef __KERNEL__
 
@@ -201,9 +202,9 @@ static inline unsigned long __xchg(unsigned long x, void * ptr, int size)
 
 #define __HAVE_ARCH_CMPXCHG 1
 
-#define cmpxchg(ptr,o,n)\
-       ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
-                                       (unsigned long)(n),sizeof(*(ptr))))
+#define cmpxchg(ptr, o, n)                                             \
+       ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o),       \
+                                       (unsigned long)(n), sizeof(*(ptr))))
 
 extern void __cmpxchg_called_with_bad_pointer(void);
 
@@ -355,6 +356,44 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
 
 #include <linux/irqflags.h>
 
+#include <asm-generic/cmpxchg-local.h>
+
+static inline unsigned long __cmpxchg_local(volatile void *ptr,
+                                     unsigned long old,
+                                     unsigned long new, int size)
+{
+       switch (size) {
+       case 1:
+       case 2:
+       case 4:
+#ifdef __s390x__
+       case 8:
+#endif
+               return __cmpxchg(ptr, old, new, size);
+       default:
+               return __cmpxchg_local_generic(ptr, old, new, size);
+       }
+
+       return old;
+}
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr, o, n)                                       \
+       ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \
+                       (unsigned long)(n), sizeof(*(ptr))))
+#ifdef __s390x__
+#define cmpxchg64_local(ptr, o, n)                                     \
+  ({                                                                   \
+       BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
+       cmpxchg_local((ptr), (o), (n));                                 \
+  })
+#else
+#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+#endif
+
 /*
  * Use to set psw mask except for the first byte which
  * won't be changed by this function.
@@ -368,6 +407,8 @@ __set_psw_mask(unsigned long mask)
 #define local_mcck_enable()  __set_psw_mask(psw_kernel_bits)
 #define local_mcck_disable() __set_psw_mask(psw_kernel_bits & ~PSW_MASK_MCHECK)
 
+int stfle(unsigned long long *list, int doublewords);
+
 #ifdef CONFIG_SMP
 
 extern void smp_ctl_set_bit(int cr, int bit);
@@ -382,6 +423,23 @@ extern void smp_ctl_clear_bit(int cr, int bit);
 
 #endif /* CONFIG_SMP */
 
+static inline unsigned int stfl(void)
+{
+       asm volatile(
+               "       .insn   s,0xb2b10000,0(0)\n" /* stfl */
+               "0:\n"
+               EX_TABLE(0b,0b));
+       return S390_lowcore.stfl_fac_list;
+}
+
+static inline unsigned short stap(void)
+{
+       unsigned short cpu_address;
+
+       asm volatile("stap %0" : "=m" (cpu_address));
+       return cpu_address;
+}
+
 extern void (*_machine_restart)(char *command);
 extern void (*_machine_halt)(void);
 extern void (*_machine_power_off)(void);