/* $Id: ppc.h,v 1.2 2005/04/09 10:25:47 mikpe Exp $

 * PPC32-specific code for performance counters library.

 *

 * Copyright (C) 2004  Mikael Pettersson

 */

#ifndef __LIB_PERFCTR_PPC_H

#define __LIB_PERFCTR_PPC_H

static __inline__ unsigned long get_tbl(void)

{

    unsigned long tbl;

    asm volatile("mftb %0" : "=r" (tbl));

    return tbl;

}

#define rdtscl(x)	do { (x) = get_tbl(); } while(0)

#define SPRN_PVR	0x11F

#define PVR_VER(pvr)	(((pvr) >> 16) & 0xFFFF)

#define SPRN_UPMC1	0x3A9

#define SPRN_UPMC2	0x3AA

#define SPRN_UPMC3	0x3AD

#define SPRN_UPMC4	0x3AE

#define SPRN_UPMC5	0x3A1

#define SPRN_UPMC6	0x3A2

#define __stringify_1(x)	#x

#define __stringify(x)		__stringify_1(x)

#define mfspr(rn)	({unsigned int rval; \

			asm volatile("mfspr %0," __stringify(rn) \

				: "=r" (rval)); rval; })

static __inline__ unsigned int read_pmc(unsigned int pmc)

{

    switch( pmc ) {

      default: /* impossible, but silences gcc warning */

      case 0:

	return mfspr(SPRN_UPMC1);

      case 1:

	return mfspr(SPRN_UPMC2);

      case 2:

	return mfspr(SPRN_UPMC3);

      case 3:

	return mfspr(SPRN_UPMC4);

      case 4:

	return mfspr(SPRN_UPMC5);

      case 5:

	return mfspr(SPRN_UPMC6);

    }

}

#define rdpmcl(pmc,x)	do { (x) = read_pmc((pmc)); } while(0)

#define vperfctr_has_rdpmc(vperfctr)	((vperfctr)->have_rdpmc)

extern void perfctr_info_cpu_init(struct perfctr_info*);

#endif /* __LIB_PERFCTR_PPC_H */