Release 4.7 tools/perf/arch/powerpc/util/header.c

#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <linux/stringify.h>
#include "header.h"
#include "util.h"


#define mfspr(rn)       ({unsigned long rval; \
                         asm volatile("mfspr %0," __stringify(rn) \
                                      : "=r" (rval)); rval; })


#define SPRN_PVR        0x11F	
/* Processor Version Register */

#define PVR_VER(pvr)    (((pvr) >>  16) & 0xFFFF) 
/* Version field */

#define PVR_REV(pvr)    (((pvr) >>   0) & 0xFFFF) 
/* Revison field */


int

get_cpuid(char *buffer, size_t sz)
{
	unsigned long pvr;
	int nb;

	pvr = mfspr(SPRN_PVR);

	nb = scnprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));

	/* look for end marker to ensure the entire data fit */
	if (strchr(buffer, '$')) {
		buffer[nb-1] = '\0';
		return 0;
	}
	return -1;
}
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Directory: tools/perf/arch/powerpc/util

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