| #include <sys/types.h> |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "../../util/header.h" |
| |
| #define __stringify_1(x) #x |
| #define __stringify(x) __stringify_1(x) |
| |
| #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; |
| } |
