[mirror_ubuntu-hirsute-kernel.git] / 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, '$')) {
		buffer[nb-1] = '\0';
		return 0;
	}
	return -1;
}
Commit	Line	Data
fbe96f29 SE	1	#include <sys/types.h>
	2	#include <unistd.h>
	3	#include <stdio.h>
	4	#include <stdlib.h>
	5	#include <string.h>
531d2410	6	#include <linux/stringify.h>
379649cf SB	7	#include "header.h"
379649cf SB	8	#include "util.h"
fbe96f29 SE	9
	10	#define mfspr(rn) ({unsigned long rval; \
	11	asm volatile("mfspr %0," __stringify(rn) \
	12	: "=r" (rval)); rval; })
	13
	14	#define SPRN_PVR 0x11F /* Processor Version Register */
	15	#define PVR_VER(pvr) (((pvr) >> 16) & 0xFFFF) /* Version field */
	16	#define PVR_REV(pvr) (((pvr) >> 0) & 0xFFFF) /* Revison field */
	17
	18	int
	19	get_cpuid(char *buffer, size_t sz)
	20	{
	21	unsigned long pvr;
	22	int nb;
	23
	24	pvr = mfspr(SPRN_PVR);
	25
e7f01d1e	26	nb = scnprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));
fbe96f29 SE	27
	28	/* look for end marker to ensure the entire data fit */
	29	if (strchr(buffer, '$')) {
	30	buffer[nb-1] = '\0';
	31	return 0;
	32	}
	33	return -1;
	34	}