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