#include <linux/linkage.h>
#include <linux/compiler.h>
#include <mach/anomaly.h>
+#include <asm/pda.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
/*
- * Interrupt configuring macros.
+ * Force strict CPU ordering.
*/
+#define nop() asm volatile ("nop;\n\t"::)
+#define mb() asm volatile ("" : : :"memory")
+#define rmb() asm volatile ("" : : :"memory")
+#define wmb() asm volatile ("" : : :"memory")
+#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
+#define read_barrier_depends() do { } while(0)
-extern unsigned long irq_flags;
-
-#define local_irq_enable() \
- __asm__ __volatile__( \
- "sti %0;" \
- : \
- : "d" (irq_flags) \
- )
-
-#define local_irq_disable() \
- do { \
- int __tmp_dummy; \
- __asm__ __volatile__( \
- "cli %0;" \
- : "=d" (__tmp_dummy) \
- ); \
- } while (0)
-
-#if ANOMALY_05000244 && defined(CONFIG_BFIN_ICACHE)
-# define NOP_PAD_ANOMALY_05000244 "nop; nop;"
-#else
-# define NOP_PAD_ANOMALY_05000244
-#endif
-
-#define idle_with_irq_disabled() \
- __asm__ __volatile__( \
- NOP_PAD_ANOMALY_05000244 \
- ".align 8;" \
- "sti %0;" \
- "idle;" \
- : \
- : "d" (irq_flags) \
- )
-
-#ifdef CONFIG_DEBUG_HWERR
-# define __save_and_cli(x) \
- __asm__ __volatile__( \
- "cli %0;" \
- "sti %1;" \
- : "=&d" (x) \
- : "d" (0x3F) \
- )
-#else
-# define __save_and_cli(x) \
- __asm__ __volatile__( \
- "cli %0;" \
- : "=&d" (x) \
- )
-#endif
-
-#define local_save_flags(x) \
- __asm__ __volatile__( \
- "cli %0;" \
- "sti %0;" \
- : "=d" (x) \
- )
+#ifdef CONFIG_SMP
+asmlinkage unsigned long __raw_xchg_1_asm(volatile void *ptr, unsigned long value);
+asmlinkage unsigned long __raw_xchg_2_asm(volatile void *ptr, unsigned long value);
+asmlinkage unsigned long __raw_xchg_4_asm(volatile void *ptr, unsigned long value);
+asmlinkage unsigned long __raw_cmpxchg_1_asm(volatile void *ptr,
+ unsigned long new, unsigned long old);
+asmlinkage unsigned long __raw_cmpxchg_2_asm(volatile void *ptr,
+ unsigned long new, unsigned long old);
+asmlinkage unsigned long __raw_cmpxchg_4_asm(volatile void *ptr,
+ unsigned long new, unsigned long old);
+
+#ifdef __ARCH_SYNC_CORE_DCACHE
+# define smp_mb() do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0)
+# define smp_rmb() do { barrier(); smp_check_barrier(); } while (0)
+# define smp_wmb() do { barrier(); smp_mark_barrier(); } while (0)
+#define smp_read_barrier_depends() do { barrier(); smp_check_barrier(); } while (0)
-#ifdef CONFIG_DEBUG_HWERR
-#define irqs_enabled_from_flags(x) (((x) & ~0x3f) != 0)
#else
-#define irqs_enabled_from_flags(x) ((x) != 0x1f)
+# define smp_mb() barrier()
+# define smp_rmb() barrier()
+# define smp_wmb() barrier()
+#define smp_read_barrier_depends() barrier()
#endif
-#define local_irq_restore(x) \
- do { \
- if (irqs_enabled_from_flags(x)) \
- local_irq_enable(); \
- } while (0)
+static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
+ int size)
+{
+ unsigned long tmp;
-/* For spinlocks etc */
-#define local_irq_save(x) __save_and_cli(x)
+ switch (size) {
+ case 1:
+ tmp = __raw_xchg_1_asm(ptr, x);
+ break;
+ case 2:
+ tmp = __raw_xchg_2_asm(ptr, x);
+ break;
+ case 4:
+ tmp = __raw_xchg_4_asm(ptr, x);
+ break;
+ }
-#define irqs_disabled() \
-({ \
- unsigned long flags; \
- local_save_flags(flags); \
- !irqs_enabled_from_flags(flags); \
-})
+ return tmp;
+}
/*
- * Force strict CPU ordering.
+ * 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 nop() asm volatile ("nop;\n\t"::)
-#define mb() asm volatile ("" : : :"memory")
-#define rmb() asm volatile ("" : : :"memory")
-#define wmb() asm volatile ("" : : :"memory")
-#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
+static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
+ unsigned long new, int size)
+{
+ unsigned long tmp;
-#define read_barrier_depends() do { } while(0)
+ switch (size) {
+ case 1:
+ tmp = __raw_cmpxchg_1_asm(ptr, new, old);
+ break;
+ case 2:
+ tmp = __raw_cmpxchg_2_asm(ptr, new, old);
+ break;
+ case 4:
+ tmp = __raw_cmpxchg_4_asm(ptr, new, old);
+ break;
+ }
+
+ return tmp;
+}
+#define cmpxchg(ptr, o, n) \
+ ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o), \
+ (unsigned long)(n), sizeof(*(ptr))))
+
+#else /* !CONFIG_SMP */
-#ifdef CONFIG_SMP
-#define smp_mb() mb()
-#define smp_rmb() rmb()
-#define smp_wmb() wmb()
-#define smp_read_barrier_depends() read_barrier_depends()
-#else
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#define smp_read_barrier_depends() do { } while(0)
-#endif
-
-#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
struct __xchg_dummy {
unsigned long a[100];
(unsigned long)(n), sizeof(*(ptr))))
#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
-#ifndef CONFIG_SMP
#include <asm-generic/cmpxchg.h>
-#endif
+
+#endif /* !CONFIG_SMP */
+
+#define xchg(ptr, x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
+#define tas(ptr) ((void)xchg((ptr), 1))
#define prepare_to_switch() do { } while(0)
* ptr isn't the current task, in which case it does nothing.
*/
-#include <asm/blackfin.h>
+#include <asm/l1layout.h>
+#include <asm/mem_map.h>
asmlinkage struct task_struct *resume(struct task_struct *prev, struct task_struct *next);
(last) = resume (prev, next); \
} while (0)
-#endif /* _BLACKFIN_SYSTEM_H */
+#endif /* _BLACKFIN_SYSTEM_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff