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>

diff --git a/arch/arm/mach-mx6/board-mx6q_sabresd.c b/arch/arm/mach-mx6/board-mx6q_sabresd.c
index bc1f4d13c7da90f5475e5627f6869e1770399b75..fdd702337aa317b70d3cfeac5193064305f48687 100644 (file)
--- a/arch/arm/mach-mx6/board-mx6q_sabresd.c
+++ b/arch/arm/mach-mx6/board-mx6q_sabresd.c
@@ -1817,6 +1817,8 @@ static void __init mx6_sabresd_board_init(void)
                gpio_direction_output(SABRESD_ELAN_RST, 1);
                gpio_direction_output(SABRESD_ELAN_CE, 1);
        }
+
+       imx6_add_armpmu();
 }
 
 extern void __iomem *twd_base;

diff --git a/arch/arm/mach-mx6/devices-imx6q.h b/arch/arm/mach-mx6/devices-imx6q.h
index 7695d1253035b06e8038b6355849b87b70f22a8f..0a30052c03e5d6ee5718d96fbc6174ddddaf9e91 100644 (file)
--- a/arch/arm/mach-mx6/devices-imx6q.h
+++ b/arch/arm/mach-mx6/devices-imx6q.h
@@ -242,3 +242,5 @@ extern const struct imx_pcie_data imx6q_pcie_data __initconst;
 extern const struct imx_imx_keypad_data imx6sl_imx_keypad_data;
 #define imx6sl_add_imx_keypad(pdata)   \
        imx_add_imx_keypad(&imx6sl_imx_keypad_data, pdata)
+
+#define imx6_add_armpmu() imx_add_imx_armpmu()

diff --git a/arch/arm/plat-mxc/devices/Makefile b/arch/arm/plat-mxc/devices/Makefile
index 386b9cb4e29c2db5721663477399ae8d4f1e6744..41287783cb80b71e6cd0c944f68e87c24125ccd7 100755 (executable)
--- 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 (file)
index 0000000..cf29415
--- /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 369ec0f6bd4a94e3632166d16d484403907f6904..8aa1322e2e11311acd26c2bb5190535fda7723b4 100755 (executable)
--- 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);