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

INCLUDED FROM

DEFINITIONS

1. rdvr
2. rdusp
3. rdsp
4. _get_base

#ifndef __ASM_CRIS_ARCH_SYSTEM_H
#define __ASM_CRIS_ARCH_SYSTEM_H


/* read the CPU version register */

static inline unsigned long rdvr(void) {
        unsigned char vr;
        __asm__ volatile ("move $vr,%0" : "=rm" (vr));
        return vr;
}

#define cris_machine_name "cris"

/* read/write the user-mode stackpointer */

static inline unsigned long rdusp(void) {
        unsigned long usp;
        __asm__ __volatile__("move $usp,%0" : "=rm" (usp));
        return usp;
}

#define wrusp(usp) \
        __asm__ __volatile__("move %0,$usp" : /* no outputs */ : "rm" (usp))

/* read the current stackpointer */

static inline unsigned long rdsp(void) {
        unsigned long sp;
        __asm__ __volatile__("move.d $sp,%0" : "=rm" (sp));
        return sp;
}

static inline unsigned long _get_base(char * addr)
{
  return 0;
}

#define nop() __asm__ __volatile__ ("nop");

#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
#define tas(ptr) (xchg((ptr),1))

struct __xchg_dummy { unsigned long a[100]; };
#define __xg(x) ((struct __xchg_dummy *)(x))

/* interrupt control.. */
#define local_save_flags(x)     __asm__ __volatile__ ("move $ccr,%0" : "=rm" (x) : : "memory");
#define local_irq_restore(x)    __asm__ __volatile__ ("move %0,$ccr" : : "rm" (x) : "memory");
#define local_irq_disable()     __asm__ __volatile__ ( "di" : : :"memory");
#define local_irq_enable()      __asm__ __volatile__ ( "ei" : : :"memory");

#define irqs_disabled()                 \
({                                      \
        unsigned long flags;            \
        local_save_flags(flags);        \
        !(flags & (1<<5));              \
})

/* For spinlocks etc */
#define local_irq_save(x) __asm__ __volatile__ ("move $ccr,%0\n\tdi" : "=rm" (x) : : "memory");

#endif