#ifndef _BLACKFIN_SYSTEM_H
#define _BLACKFIN_SYSTEM_H
-#include <linux/config.h> /* get configuration macros */
-#include <asm/linkage.h>
-#include <asm/blackfin.h>
-#include <asm/segment.h>
-#include <asm/entry.h>
-
-#define prepare_to_switch() do { } while(0)
-
-/*
- * switch_to(n) should switch tasks to task ptr, first checking that
- * ptr isn't the current task, in which case it does nothing. This
- * also clears the TS-flag if the task we switched to has used the
- * math co-processor latest.
- *
- * 05/25/01 - Tony Kou (tonyko@lineo.ca)
- *
- * Adapted for BlackFin (ADI) by Ted Ma, Metrowerks, and Motorola GSG
- * Copyright (c) 2002 Arcturus Networks Inc. (www.arcturusnetworks.com)
- * Copyright (c) 2003 Metrowerks (www.metrowerks.com)
- */
-
-asmlinkage void resume(void);
-
-#define switch_to(prev,next,last) { \
- void *_last; \
- __asm__ __volatile__( \
- "r0 = %1;\n\t" \
- "r1 = %2;\n\t" \
- "call resume;\n\t" \
- "%0 = r0;\n\t" \
- : "=d" (_last) \
- : "d" (prev), \
- "d" (next) \
- : "CC", "R0", "R1", "R2", "R3", "R4", "R5", "P0", "P1");\
- (last) = _last; \
-}
-
-/* Force kerenl switch to user mode -- Steven Chen */
-#define switch_to_user_mode() { \
- __asm__ __volatile__( \
- "call kernel_to_user_mode;\n\t" \
- :: \
- : "CC", "R0", "R1", "R2", "R3", "R4", "R5", "P0", "P1");\
-}
-
/*
* Interrupt configuring macros.
*/
extern int irq_flags;
-#define __sti() { \
- __asm__ __volatile__ ( \
- "r3 = %0;" \
- "sti r3;" \
- ::"m"(irq_flags):"R3"); \
-}
-
-#define __cli() { \
- __asm__ __volatile__ ( \
- "cli r3;" \
- :::"R3"); \
-}
-
-#define __save_flags(x) { \
- __asm__ __volatile__ ( \
- "cli r3;" \
- "%0 = r3;" \
- "sti r3;" \
- ::"m"(x):"R3"); \
-}
-
-#define __save_and_cli(x) { \
- __asm__ __volatile__ ( \
- "cli r3;" \
- "%0 = r3;" \
- ::"m"(x):"R3"); \
-}
-
-#define __restore_flags(x) { \
- __asm__ __volatile__ ( \
- "r3 = %0;" \
- "sti r3;" \
- ::"m"(x):"R3"); \
-}
-
-/* For spinlocks etc */
-#define local_irq_save(x) __save_and_cli(x)
-#define local_irq_restore(x) __restore_flags(x)
-#define local_irq_disable() __cli()
-#define local_irq_enable() __sti()
-
-#define cli() __cli()
-#define sti() __sti()
-#define save_flags(x) __save_flags(x)
-#define restore_flags(x) __restore_flags(x)
-#define save_and_cli(x) __save_and_cli(x)
+#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)
+
+# define local_irq_save(x) \
+ __asm__ __volatile__ ( \
+ "cli %0;" \
+ : "=&d" (x) \
+ )
+
+#define local_save_flags(x) \
+ __asm__ __volatile__ ( \
+ "cli %0;" \
+ "sti %0;" \
+ : "=d" (x) \
+ )
+
+#define irqs_enabled_from_flags(x) ((x) != 0x1f)
+
+#define local_irq_restore(x) \
+ do { \
+ if (irqs_enabled_from_flags(x)) \
+ local_irq_enable(); \
+ } while (0)
/*
* Force strict CPU ordering.
#define set_mb(var, value) set_rmb(var, value)
#define set_wmb(var, value) do { var = value; wmb(); } while (0)
-#ifdef CONFIG_SMP
-#define smp_mb() mb()
-#define smp_rmb() rmb()
-#define smp_wmb() wmb()
-#else
-#define smp_mb() barrier()
-#define smp_rmb() barrier()
-#define smp_wmb() barrier()
-#endif
-
-#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
-#define tas(ptr) (xchg((ptr),1))
+#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
struct __xchg_dummy {
unsigned long a[100];
};
-#define __xg(x) ((volatile struct __xchg_dummy *)(x))
+#define __xg(x) ((volatile struct __xchg_dummy *)(x))
static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
int size)
{
- unsigned long tmp;
+ unsigned long tmp = 0;
unsigned long flags = 0;
- save_and_cli(flags);
+ local_irq_save(flags);
switch (size) {
case 1:
- __asm__ __volatile__("%0 = %2;\n\t" "%2 = %1;\n\t": "=&d"(tmp): "d"(x), "m"(*__xg(ptr)):"memory");
+ __asm__ __volatile__
+ ("%0 = b%2 (z);\n\t"
+ "b%2 = %1;\n\t"
+ : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
break;
case 2:
- __asm__ __volatile__("%0 = %2;\n\t" "%2 = %1;\n\t": "=&d"(tmp): "d"(x), "m"(*__xg(ptr)):"memory");
+ __asm__ __volatile__
+ ("%0 = w%2 (z);\n\t"
+ "w%2 = %1;\n\t"
+ : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
break;
case 4:
- __asm__ __volatile__("%0 = %2;\n\t" "%2 = %1;\n\t": "=&d"(tmp): "d"(x), "m"(*__xg(ptr)):"memory");
+ __asm__ __volatile__
+ ("%0 = %2;\n\t"
+ "%2 = %1;\n\t"
+ : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
break;
}
- restore_flags(flags);
+ local_irq_restore(flags);
return tmp;
}
-/* Depend on whether Blackfin has hard reset function */
-/* YES it does, but it is tricky to implement - FIXME later ...MaTed--- */
-#define HARD_RESET_NOW() ({})
-
#endif /* _BLACKFIN_SYSTEM_H */
projects / karo-tx-uboot.git / blobdiff