release/src-rt-6.x.4708/linux/linux-2.6.36/arch/cris/include/arch-v32/arch/system.h

   1 #ifndef _ASM_CRIS_ARCH_SYSTEM_H
   2 #define _ASM_CRIS_ARCH_SYSTEM_H
   3
   4
   5 /* Read the CPU version register. */
   6 static inline unsigned long rdvr(void)
   7 {
   8         unsigned char vr;
   9
  10         __asm__ __volatile__ ("move $vr, %0" : "=rm" (vr));
  11         return vr;
  12 }
  13
  14 #define cris_machine_name "crisv32"
  15
  16 /* Read the user-mode stack pointer. */
  17 static inline unsigned long rdusp(void)
  18 {
  19         unsigned long usp;
  20
  21         __asm__ __volatile__ ("move $usp, %0" : "=rm" (usp));
  22         return usp;
  23 }
  24
  25 /* Read the current stack pointer. */
  26 static inline unsigned long rdsp(void)
  27 {
  28         unsigned long sp;
  29
  30         __asm__ __volatile__ ("move.d $sp, %0" : "=rm" (sp));
  31         return sp;
  32 }
  33
  34 /* Write the user-mode stack pointer. */
  35 #define wrusp(usp) __asm__ __volatile__ ("move %0, $usp" : : "rm" (usp))
  36
  37 #define nop() __asm__ __volatile__ ("nop");
  38
  39 #define xchg(ptr,x) \
  40         ((__typeof__(*(ptr)))__xchg((unsigned long) (x),(ptr),sizeof(*(ptr))))
  41
  42 #define tas(ptr) (xchg((ptr),1))
  43
  44 struct __xchg_dummy { unsigned long a[100]; };
  45 #define __xg(x) ((struct __xchg_dummy *)(x))
  46
  47 /* Used for interrupt control. */
  48 #define local_save_flags(x) \
  49         __asm__ __volatile__ ("move $ccs, %0" : "=rm" (x) : : "memory");
  50
  51 #define local_irq_restore(x) \
  52         __asm__ __volatile__ ("move %0, $ccs" : : "rm" (x) : "memory");
  53
  54 #define local_irq_disable()  __asm__ __volatile__ ("di" : : : "memory");
  55 #define local_irq_enable()   __asm__ __volatile__ ("ei" : : : "memory");
  56
  57 #define irqs_disabled()         \
  58 ({                              \
  59         unsigned long flags;    \
  60                                 \
  61         local_save_flags(flags);\
  62         !(flags & (1 << I_CCS_BITNR));  \
  63 })
  64
  65 /* Used for spinlocks, etc. */
  66 #define local_irq_save(x) \
  67         __asm__ __volatile__ ("move $ccs, %0\n\tdi" : "=rm" (x) : : "memory");
  68
  69 #endif /* _ASM_CRIS_ARCH_SYSTEM_H */