release/src-rt-6.x.4708/linux/linux-2.6.36/arch/cris/include/arch-v10/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
   7 static inline unsigned long rdvr(void) {
   8         unsigned char vr;
   9         __asm__ volatile ("move $vr,%0" : "=rm" (vr));
  10         return vr;
  11 }
  12
  13 #define cris_machine_name "cris"
  14
  15 /* read/write the user-mode stackpointer */
  16
  17 static inline unsigned long rdusp(void) {
  18         unsigned long usp;
  19         __asm__ __volatile__("move $usp,%0" : "=rm" (usp));
  20         return usp;
  21 }
  22
  23 #define wrusp(usp) \
  24         __asm__ __volatile__("move %0,$usp" : /* no outputs */ : "rm" (usp))
  25
  26 /* read the current stackpointer */
  27
  28 static inline unsigned long rdsp(void) {
  29         unsigned long sp;
  30         __asm__ __volatile__("move.d $sp,%0" : "=rm" (sp));
  31         return sp;
  32 }
  33
  34 static inline unsigned long _get_base(char * addr)
  35 {
  36   return 0;
  37 }
  38
  39 #define nop() __asm__ __volatile__ ("nop");
  40
  41 #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
  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 /* interrupt control.. */
  48 #define local_save_flags(x)     __asm__ __volatile__ ("move $ccr,%0" : "=rm" (x) : : "memory");
  49 #define local_irq_restore(x)    __asm__ __volatile__ ("move %0,$ccr" : : "rm" (x) : "memory");
  50 #define local_irq_disable()     __asm__ __volatile__ ( "di" : : :"memory");
  51 #define local_irq_enable()      __asm__ __volatile__ ( "ei" : : :"memory");
  52
  53 #define irqs_disabled()                 \
  54 ({                                      \
  55         unsigned long flags;            \
  56         local_save_flags(flags);        \
  57         !(flags & (1<<5));              \
  58 })
  59
  60 /* For spinlocks etc */
  61 #define local_irq_save(x) __asm__ __volatile__ ("move $ccr,%0\n\tdi" : "=rm" (x) : : "memory");
  62
  63 #endif