leon3.h

这是leon3处理器的交叉编译链

#ifndef _INCLUDE_LEON3_h
#define _INCLUDE_LEON3_h

#ifndef __ASSEMBLER__

#ifdef __cplusplus
extern "C" {
#endif

#define ASI_LEON3_CACHEMISS 1
#define ASI_LEON3_SYSCTRL   0x02
#define ASI_LEON3_DFLUSH    0x11

#define ASI_LEON3_SYSCTRL_ICFG		0x08
#define ASI_LEON3_SYSCTRL_DCFG		0x0c
#define ASI_LEON3_SYSCTRL_CFG_SNOOPING (1<<27)
#define ASI_LEON3_SYSCTRL_CFG_SSIZE(c) (1<<((c>>20)&0xf))


extern __inline__ unsigned long sparc_leon23_get_psr(void) {
	unsigned int retval;
	__asm__ __volatile__("rd %%psr, %0\n\t" :
			     "=r" (retval) :);
	return (retval);
}

extern __inline__ unsigned long sparc_leon23_get_psr_version(void) {
  unsigned int psr = sparc_leon23_get_psr();
  return (psr >> 24) & 0xf;
}
#define LEON_ISLEON2 (sparc_leon23_get_psr_version() == 2 || sparc_leon23_get_psr_version() == 0)
#define LEON_ISLEON3 (sparc_leon23_get_psr_version() == 3)

extern __inline__ unsigned long sparc_leon3_get_dcachecfg(void) {
	unsigned int retval;
	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
			     "=r" (retval) :
			     "r" (ASI_LEON3_SYSCTRL_DCFG),
			     "i" (ASI_LEON3_SYSCTRL));
	return (retval);
}

extern __inline__ void sparc_leon3_enable_snooping(void) {
  /*enable snooping*/
  __asm__ volatile ("lda [%%g0] 2, %%l1\n\t"  \
                    "set 0x800000, %%l2\n\t"  \
                    "or  %%l2, %%l1, %%l2\n\t" \
                    "sta %%l2, [%%g0] 2\n\t"  \
                    :  : : "l1", "l2");	
};

extern __inline__ void sparc_leon3_disable_cache(void) {
  /*asi 2*/
  __asm__ volatile ("lda [%%g0] 2, %%l1\n\t"  \
                    "set 0x00000f, %%l2\n\t"  \
                    "andn  %%l2, %%l1, %%l2\n\t" \
                    "sta %%l2, [%%g0] 2\n\t"  \
                    :  : : "l1", "l2");	
};



extern __inline__ void sparc_leon3_dcache_flush(void) {
        __asm__ __volatile__(" flush "); //iflush 
	__asm__ __volatile__("sta %%g0, [%%g0] %0\n\t": :
			     "i" (ASI_LEON3_DFLUSH) : "memory");
};

  
#ifdef __cplusplus
}
#endif

#endif /* !ASM */

 
#endif /* !_INCLUDE_LEON3_h */
/* end of include file */