1 files changed, 134 insertions, 0 deletions
diff --git a/samples/xilinx_apm/main.c b/samples/xilinx_apm/main.c
new file mode 100644
index 000000000000..2a7eda4ab256
--- /dev/null
+++ b/samples/xilinx_apm/main.c
@@ -0,0 +1,134 @@
+/*
+ * Xilinx AXI Performance Monitor Example
+ *
+ * Copyright (c) 2013 Xilinx Inc.
+ *
+ * The code may be used by anyone for any purpose and can serve as a
+ * starting point for developing applications using Xilinx AXI
+ * Performance Monitor.
+ *
+ * This example based on Xilinx AXI Performance Monitor UIO driver shows
+ * sequence to read metrics from Xilinx AXI Performance Monitor IP.
+ * User need to provide the uio device file with option -d:
+ * main -d /dev/uio0, say /dev/uio0 as device file for AXI Performance
+ * Monitor driver. User need not clear Interrupt Status Register after
+ * waiting for interrupt on read since driver clears it.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <sys/msg.h>
+#include <sys/ipc.h>
+#include <stdint.h>
+#include "xaxipmon.h"
+
+#define MAP_SIZE 4096
+
+void usage(void)
+{
+	printf("*argv[0] -d <UIO_DEV_FILE> -i|-o <VALUE>\n");
+	printf(" -d UIO device file. e.g. /dev/uio0\n");
+	return;
+}
+
+static void start(int fd)
+{
+	u8 slot = 2;
+	int tmp;
+	u32 isr;
+
+	setmetrics(slot, XAPM_METRIC_SET_4, XAPM_METRIC_COUNTER_0);
+	setsampleinterval(0x3FFFFFF);
+
+	loadsic();
+
+	intrenable(XAPM_IXR_SIC_OVERFLOW_MASK);
+
+	intrglobalenable();
+
+	enablemetricscounter();
+
+	enablesic();
+
+	isr = intrgetstatus();
+	/* Wait for SIC overflow interrupt */
+	if (read(fd, &tmp, 4) < 0)
+		perror("Read\n");
+	/* Driver clears the interrupt and occured interrupt status is
+		stored in param->isr */
+	isr = intrgetstatus();
+	if (isr & XAPM_IXR_SIC_OVERFLOW_MASK)
+		disablesic();
+
+	disablemetricscounter();
+
+	intrdisable(XAPM_IXR_SIC_OVERFLOW_MASK);
+
+	intrglobaldisable();
+
+	printf("Required metrics: %u\n",
+		getsampledmetriccounter(XAPM_METRIC_COUNTER_0) *
+		params->scalefactor);
+}
+
+int main(int argc, char *argv[])
+{
+	int c;
+	char *uiod;
+	int fd;
+
+	while ((c = getopt(argc, argv, "d:h")) != -1) {
+		switch (c) {
+		case 'd':
+			uiod = optarg;
+			break;
+		case 'h':
+			usage();
+			return 0;
+		default:
+			printf("invalid option: %c\n", (char)c);
+			usage();
+			return -1;
+		}
+	}
+
+	/* Open the UIO device file */
+	fd = open(uiod, O_RDWR);
+	if (fd < 1) {
+		perror(argv[0]);
+		printf("Invalid UIO device file:%s.\n", uiod);
+		usage();
+		return -1;
+	}
+
+	baseaddr = (ulong)mmap(0, MAP_SIZE , PROT_READ|PROT_WRITE,
+				MAP_SHARED , fd, 0);
+	if ((u32 *)baseaddr == MAP_FAILED)
+		perror("mmap failed\n");
+
+	/* mmap the UIO device */
+	params = (struct xapm_param *)mmap(0, MAP_SIZE , PROT_READ|PROT_WRITE,
+				MAP_SHARED , fd, getpagesize());
+	if (params == MAP_FAILED)
+		perror("mmap failed\n");
+
+	if (params->mode == 1)
+		printf("AXI PMON is in Advanced Mode\n");
+	else if (params->mode == 2)
+		printf("AXI PMON is in Profile Mode\n");
+	else
+		printf("AXI PMON is in trace Mode\n");
+
+	start(fd);
+
+	close(fd);
+	munmap((u32 *)baseaddr, MAP_SIZE);
+	munmap(params, MAP_SIZE);
+
+	return 0;
+}