[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>

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