1 files changed, 67 insertions, 0 deletions
diff --git a/package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/perfcntr.c b/package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/perfcntr.c
new file mode 100644
index 000000000..aa0608e6e
--- /dev/null
+++ b/package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/perfcntr.c
@@ -0,0 +1,67 @@
+/*
+ * Broadcom BCM47xx Performance Counter /proc/cpuinfo support
+ *
+ * Copyright 2004, Broadcom Corporation
+ * All Rights Reserved.
+ * 
+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
+ *
+ * $Id$
+ */
+
+#include <asm/mipsregs.h>
+
+/* 
+ * BCM4710 performance counter register select values
+ * No even-odd control-counter mapping, just counters
+ */
+#define PERF_DCACHE_HIT		0
+#define PERF_DCACHE_MISS	1
+#define PERF_ICACHE_HIT		2
+#define PERF_ICACHE_MISS	3
+#define PERF_ICOUNT		4
+
+/* 
+ * Move from Coprocessor 0 Register 25 Select n
+ * data <- CPR[0,25,n] 
+ * GPR[1] <- data
+ */
+#define read_bcm4710_perf_cntr(n)				\
+({ int __res;							\
+        __asm__ __volatile__(					\
+	".set\tnoreorder\n\t"                                   \
+	".set\tnoat\n\t"                                        \
+	".word\t"STR(0x4001c800|(n))"\n\t"			\
+	"move\t%0,$1\n\t"                                       \
+	".set\tat\n\t"                                          \
+	".set\treorder"                                         \
+	:"=r" (__res));                                         \
+	__res;})
+
+asmlinkage unsigned int read_perf_cntr(unsigned int counter)
+{
+	switch (counter) {
+	case PERF_DCACHE_HIT:	return read_bcm4710_perf_cntr(PERF_DCACHE_HIT);
+	case PERF_DCACHE_MISS:	return read_bcm4710_perf_cntr(PERF_DCACHE_MISS);
+	case PERF_ICACHE_HIT:	return read_bcm4710_perf_cntr(PERF_ICACHE_HIT);
+	case PERF_ICACHE_MISS:	return read_bcm4710_perf_cntr(PERF_ICACHE_MISS);
+	case PERF_ICOUNT:	return read_bcm4710_perf_cntr(PERF_ICOUNT);
+	}
+	return 0;
+}
+
+asmlinkage void write_perf_cntr(unsigned int counter, unsigned int val)
+{
+}
+
+asmlinkage unsigned int read_perf_cntl(unsigned int counter)
+{
+	return 0;
+}
+
+asmlinkage void write_perf_cntl(unsigned int counter, unsigned int val)
+{
+}