include/asm-cris/arch-v10/system.h

   1 #ifndef __ASM_CRIS_ARCH_SYSTEM_H
   2 #define __ASM_CRIS_ARCH_SYSTEM_H
   3
   4 #include <linux/config.h>
   5
   6 /* read the CPU version register */
   7
   8 extern inline unsigned long rdvr(void) {
   9         unsigned char vr;
  10         __asm__ volatile ("move $vr,%0" : "=rm" (vr));
  11         return vr;
  12 }
  13
  14 /* read/write the user-mode stackpointer */
  15
  16 extern inline unsigned long rdusp(void) {
  17         unsigned long usp;
  18         __asm__ __volatile__("move $usp,%0" : "=rm" (usp));
  19         return usp;
  20 }
  21
  22 #define wrusp(usp) \
  23         __asm__ __volatile__("move %0,$usp" : /* no outputs */ : "rm" (usp))
  24
  25 /* read the current stackpointer */
  26
  27 extern inline unsigned long rdsp(void) {
  28         unsigned long sp;
  29         __asm__ __volatile__("move.d $sp,%0" : "=rm" (sp));
  30         return sp;
  31 }
  32
  33 extern inline unsigned long _get_base(char * addr)
  34 {
  35   return 0;
  36 }
  37
  38 #define nop() __asm__ __volatile__ ("nop");
  39
  40 #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
  41 #define tas(ptr) (xchg((ptr),1))
  42
  43 struct __xchg_dummy { unsigned long a[100]; };
  44 #define __xg(x) ((struct __xchg_dummy *)(x))
  45
  46 /* interrupt control.. */
  47 #define local_save_flags(x)     __asm__ __volatile__ ("move $ccr,%0" : "=rm" (x) : : "memory");
  48 #define local_irq_restore(x)    __asm__ __volatile__ ("move %0,$ccr" : : "rm" (x) : "memory");
  49 #define local_irq_disable()     __asm__ __volatile__ ( "di" : : :"memory");
  50 #define local_irq_enable()      __asm__ __volatile__ ( "ei" : : :"memory");
  51
  52 #define irqs_disabled()                 \
  53 ({                                      \
  54         unsigned long flags;            \
  55         local_save_flags(flags);        \
  56         !(flags & (1<<5));              \
  57 })
  58
  59 /* For spinlocks etc */
  60 #define local_irq_save(x) __asm__ __volatile__ ("move $ccr,%0\n\tdi" : "=rm" (x) : : "memory");
  61
  62 #endif