ENGR00214813 MX6DL SabreSD : Kernel, Enable ARM Perfromance Monitor

Register PMU resources during system bootup, so that "Perf" Command can
be used to get misc performance data of a running program

The "Perf" Exe should be built manually in
"./tools/perf" using the following command line
> make CROSS_COMPILER=... ARCH=arm CFLAGS="-static -DGElf_Nhdr=Elf32_Nhdr"
then copy the "Perf" executable to rootfs/bin

Usage :
perf            # show help content
perf list       # show all available statistics options
perf stat ls    # show all statistics of a "ls" command
perf stat -e cycles tar cvfz bin.tgz /bin
                # show "cycles" statistics of command
                #     "tar cvfz ...."

MX6 Series Chips bound all CPUs PERFMON IRQ to one, this may cause some
problems when get per-CPU statistics. Need further investigation

Signed-off-by: Eric Sun <jian.sun@freescale.com>

3 files changed, 47 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/devices/Makefile b/arch/arm/plat-mxc/devices/Makefile
index 386b9cb4e29c..41287783cb80 100755
--- a/arch/arm/plat-mxc/devices/Makefile
+++ b/arch/arm/plat-mxc/devices/Makefile
@@ -66,3 +66,4 @@ obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_MIPI_DSI) += platform-imx-mipi_dsi.o
 obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_MIPI_CSI2) += platform-imx-mipi_csi2.o
 obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_VDOA) += platform-imx-vdoa.o
 obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_PCIE) += platform-imx-pcie.o
+obj-y += platform-imx-pmu.o
diff --git a/arch/arm/plat-mxc/devices/platform-imx-pmu.c b/arch/arm/plat-mxc/devices/platform-imx-pmu.c
new file mode 100644
index 000000000000..cf29415d679e
--- /dev/null
+++ b/arch/arm/plat-mxc/devices/platform-imx-pmu.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2012 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <asm/sizes.h>
+#include <mach/hardware.h>
+#include <mach/devices-common.h>
+#include <asm/pmu.h>
+
+static struct resource mx6_pmu_resources[] = {
+	[0] = {
+		.start	= MXC_INT_CHEETAH_PERFORM,
+		.end	= MXC_INT_CHEETAH_PERFORM,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+struct platform_device mx6_pmu_device = {
+	.name		= "arm-pmu",
+	.id		= ARM_PMU_DEVICE_CPU,
+	.num_resources	= ARRAY_SIZE(mx6_pmu_resources),
+	.resource	= mx6_pmu_resources,
+};
+
+void __init imx_add_imx_armpmu()
+{
+	platform_device_register(&mx6_pmu_device);
+}
diff --git a/arch/arm/plat-mxc/include/mach/devices-common.h b/arch/arm/plat-mxc/include/mach/devices-common.h
index 369ec0f6bd4a..8aa1322e2e11 100755
--- a/arch/arm/plat-mxc/include/mach/devices-common.h
+++ b/arch/arm/plat-mxc/include/mach/devices-common.h
@@ -685,3 +685,5 @@ struct imx_pcie_data {
 struct platform_device *__init imx_add_pcie(
 		const struct imx_pcie_data *data,
 		const struct imx_pcie_platform_data *pdata);
+
+void __init imx_add_imx_armpmu(void);