LXR linux/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
   7static 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
  17static 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
  28static inline unsigned long rdsp(void) {
  29        unsigned long sp;
  30        __asm__ __volatile__("move.d $sp,%0" : "=rm" (sp));
  31        return sp;
  32}
  33
  34static 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
  44struct __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
  64