6 #include <linux/stringify.h>
8 #define mfspr(rn) ({unsigned long rval; \
9 asm volatile("mfspr %0," __stringify(rn) \
10 : "=r" (rval)); rval; })
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 */
17 get_cpuid(char *buffer, size_t sz)
22 pvr = mfspr(SPRN_PVR);
24 nb = scnprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));
26 /* look for end marker to ensure the entire data fit */
27 if (strchr(buffer, '$')) {