perf tools: Make perf.data more self-descriptive (v8)

[pandora-kernel.git] / tools / perf / arch / powerpc / util / header.c

diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c
new file mode 100644 (file)
index 0000000..eba80c2
--- /dev/null
+++ b/tools/perf/arch/powerpc/util/header.c
@@ -0,0 +1,36 @@
+#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 = snprintf(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;
+}