diff options
| author | Tiberiu Breana <andrei-tiberiu.breana@nxp.com> | 2017-02-15 15:00:26 +0300 |
|---|---|---|
| committer | Shawn Guo <shawnguo@kernel.org> | 2017-03-09 20:19:27 +0300 |
| commit | 55edcbb2db3a41c1520425b84c620286f4e5e394 (patch) | |
| tree | 543f67d9c460dfe59e01dfbf482e0b824e7adf89 /arch/arm/mach-imx/mmdc.c | |
| parent | 579616bac106282b1f0d4cf4026e54a1e1326a2f (diff) | |
| download | linux-55edcbb2db3a41c1520425b84c620286f4e5e394.tar.xz | |
ARM: imx: Add AXI address filter support for MMDC profiling
Add support for an extra config parameter for perf commands:
axi_id, which will be written in the MMDC's MADPCR1 register,
to filter memory usage profiling (see i.MX6 reference manual,
chapter 44.7 MMDC Profiling for AXI id usage).
Signed-off-by: Tiberiu Breana <andrei-tiberiu.breana@nxp.com>
Acked-by: Frank Li <Frank.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'arch/arm/mach-imx/mmdc.c')
| -rw-r--r-- | arch/arm/mach-imx/mmdc.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mmdc.c b/arch/arm/mach-imx/mmdc.c index 89a926f5d4d1..78262899a590 100644 --- a/arch/arm/mach-imx/mmdc.c +++ b/arch/arm/mach-imx/mmdc.c @@ -1,4 +1,5 @@ /* + * Copyright 2017 NXP * Copyright 2011,2016 Freescale Semiconductor, Inc. * Copyright 2011 Linaro Ltd. * @@ -47,6 +48,7 @@ #define PROFILE_SEL 0x10 #define MMDC_MADPCR0 0x410 +#define MMDC_MADPCR1 0x414 #define MMDC_MADPSR0 0x418 #define MMDC_MADPSR1 0x41C #define MMDC_MADPSR2 0x420 @@ -57,6 +59,7 @@ #define MMDC_NUM_COUNTERS 6 #define MMDC_FLAG_PROFILE_SEL 0x1 +#define MMDC_PRF_AXI_ID_CLEAR 0x0 #define to_mmdc_pmu(p) container_of(p, struct mmdc_pmu, pmu) @@ -161,8 +164,11 @@ static struct attribute_group mmdc_pmu_events_attr_group = { }; PMU_FORMAT_ATTR(event, "config:0-63"); +PMU_FORMAT_ATTR(axi_id, "config1:0-63"); + static struct attribute *mmdc_pmu_format_attrs[] = { &format_attr_event.attr, + &format_attr_axi_id.attr, NULL, }; @@ -345,6 +351,14 @@ static void mmdc_pmu_event_start(struct perf_event *event, int flags) writel(DBG_RST, reg); + /* + * Write the AXI id parameter to MADPCR1. + */ + val = event->attr.config1; + reg = mmdc_base + MMDC_MADPCR1; + writel(val, reg); + + reg = mmdc_base + MMDC_MADPCR0; val = DBG_EN; if (pmu_mmdc->devtype_data->flags & MMDC_FLAG_PROFILE_SEL) val |= PROFILE_SEL; @@ -382,6 +396,10 @@ static void mmdc_pmu_event_stop(struct perf_event *event, int flags) reg = mmdc_base + MMDC_MADPCR0; writel(PRF_FRZ, reg); + + reg = mmdc_base + MMDC_MADPCR1; + writel(MMDC_PRF_AXI_ID_CLEAR, reg); + mmdc_pmu_event_update(event); } |