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KSAPI: Performance monitoring tool for Snapdragon linux

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KSAPI records performance statistics for Snapdragon linux platform.
It uses the /proc FS as a means to exchange configuration data and counter
statistics. It can monitor the counter statistics for Scorpion processor
supported hardware performance counters on a per thread basis or AXI
counters on an overall system basis.

Change-Id: Iaaf51db68dbd6d5a55fe34328d041bde5015230d
Signed-off-by: Sheetal Sahasrabudhe <sheetals@codeaurora.org>
(cherry picked from commit 4e6bb52bcee479762f283b4a44a1bdd4f1277aa2)

Conflicts:

	arch/arm/Kconfig
This commit is contained in:
Sheetal Sahasrabudhe
2010-09-15 12:50:40 -04:00
committed by Stephen Boyd
parent 8636af8f7a
commit e11d14dfd1
16 changed files with 4532 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
arch/arm/Kconfig
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@@ -1416,6 +1416,18 @@ config PL310_ERRATA_769419
on systems with an outer cache, the store buffer is drained
explicitly.
config KSAPI
tristate "KSAPI support (EXPERIMENTAL)"
depends on ARCH_MSM_SCORPION || ARCH_MSM_KRAIT
default n
help
KSAPI: Performance monitoring tool for linux.
KSAPI records performance statistics for Snapdragon linux platform.
It uses the /proc FS as a means to exchange configuration data and
counter statistics. It can monitor the counter statistics for
Scorpion processor supported hardware performance counters on a per
thread basis or AXI counters on an overall system basis.
endmenu
source "arch/arm/common/Kconfig"

1
arch/arm/Makefile
View File

@@ -257,6 +257,7 @@ core-y += arch/arm/net/
core-y += $(machdirs) $(platdirs)
drivers-$(CONFIG_OPROFILE) += arch/arm/oprofile/
core-y += arch/arm/perfmon/
libs-y := arch/arm/lib/ $(libs-y)

48
arch/arm/include/asm/perftypes.h Normal file
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@@ -0,0 +1,48 @@
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Code Aurora nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
** perftypes.h
** DESCRIPTION
** ksapi.ko function hooks header file
*/
#ifndef __PERFTYPES_H__
#define __PERFTYPES_H__
typedef void (*VPVF)(void);
typedef void (*VPULF)(unsigned long);
typedef void (*VPULULF)(unsigned long, unsigned long);
extern VPVF pp_interrupt_out_ptr;
extern VPVF pp_interrupt_in_ptr;
extern VPULF pp_process_remove_ptr;
extern void perf_mon_interrupt_in(void);
extern void perf_mon_interrupt_out(void);
#endif

4
arch/arm/kernel/irq.c
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@@ -40,6 +40,8 @@
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include <asm/perftypes.h>
/*
* No architecture-specific irq_finish function defined in arm/arch/irqs.h.
*/
@@ -71,6 +73,7 @@ void handle_IRQ(unsigned int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
perf_mon_interrupt_in();
irq_enter();
/*
@@ -90,6 +93,7 @@ void handle_IRQ(unsigned int irq, struct pt_regs *regs)
irq_exit();
set_irq_regs(old_regs);
perf_mon_interrupt_out();
}
/*

9
arch/arm/perfmon/Makefile Normal file
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@@ -0,0 +1,9 @@
obj-$(CONFIG_KSAPI) += ksapi.o
# Object file lists.
obj-y += perf-function-hooks.o
#ifdef CONFIG_ARCH_MSM8X60
ksapi-y += perf-v7.o perf-smp.o per.o per-process-perf.o per-axi.o
#else
ksapi-y += perf-v7.o per.o per-process-perf.o per-axi.o
#endif

109
arch/arm/perfmon/cp15_registers.h Normal file
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@@ -0,0 +1,109 @@
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Code Aurora nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
cp15_registers.h
DESCRIPTION: define macros for reading and writing to the cp registers
for the ARMv7
REV/DATE: Fri Mar 18 15:54:32 EST 2005
*/
#ifndef __cp15_registers__
#define __cp15_registers__
#include "mcrmrc.h"
#define WCP15_SDER(reg) MCR15(reg, 0, c1, c1, 1)
/*
* Performance Monitor Registers
*/
#define WCP15_PMACTLR(reg) MCR15(reg, 0, c9, c15, 5)
#define WCP15_PMCCNTCR(reg) MCR15(reg, 0, c9, c15, 2)
#define WCP15_PMCCNTR(reg) MCR15(reg, 0, c9, c13, 0)
#define WCP15_PMCCNTSR(reg) MCR15(reg, 0, c9, c13, 3)
#define WCP15_PMCNTENCLR(reg) MCR15(reg, 0, c9, c12, 2)
#define WCP15_PMCNTENSET(reg) MCR15(reg, 0, c9, c12, 1)
#define WCP15_PMCR(reg) MCR15(reg, 0, c9, c12, 0)
#define WCP15_PMINTENCLR(reg) MCR15(reg, 0, c9, c14, 2)
#define WCP15_PMINTENSET(reg) MCR15(reg, 0, c9, c14, 1)
#define WCP15_PMOVSR(reg) MCR15(reg, 0, c9, c12, 3)
#define WCP15_PMRLDR(reg) MCR15(reg, 0, c9, c15, 4)
#define WCP15_PMSELR(reg) MCR15(reg, 0, c9, c12, 5)
#define WCP15_PMSWINC(reg) MCR15(reg, 0, c9, c12, 4)
#define WCP15_PMUSERENR(reg) MCR15(reg, 0, c9, c14, 0)
#define WCP15_PMXEVCNTCR(reg) MCR15(reg, 0, c9, c15, 0)
#define WCP15_PMXEVCNTR(reg) MCR15(reg, 0, c9, c13, 2)
#define WCP15_PMXEVCNTSR(reg) MCR15(reg, 0, c9, c15, 1)
#define WCP15_PMXEVTYPER(reg) MCR15(reg, 0, c9, c13, 1)
#define WCP15_LPM0EVTYPER(reg) MCR15(reg, 0, c15, c0, 0)
#define WCP15_LPM1EVTYPER(reg) MCR15(reg, 1, c15, c0, 0)
#define WCP15_LPM2EVTYPER(reg) MCR15(reg, 2, c15, c0, 0)
#define WCP15_LPM3EVTYPER(reg) MCR15(reg, 3, c15, c0, 0)
#define WCP15_L2LPMEVTYPER(reg) MCR15(reg, 3, c15, c2, 0)
#define WCP15_VLPMEVTYPER(reg) MCR15(reg, 7, c11, c0, 0)
#define WCP15_L2VR3F1(reg) MCR15(reg, 3, c15, c15, 1)
/*
* READ the registers
*/
#define RCP15_SDER(reg) MRC15(reg, 0, c1, c1, 1)
/*
* Performance Monitor Registers
*/
#define RCP15_PMACTLR(reg) MRC15(reg, 0, c9, c15, 5)
#define RCP15_PMCCNTCR(reg) MRC15(reg, 0, c9, c15, 2)
#define RCP15_PMCCNTR(reg) MRC15(reg, 0, c9, c13, 0)
#define RCP15_PMCCNTSR(reg) MRC15(reg, 0, c9, c13, 3)
#define RCP15_PMCNTENCLR(reg) MRC15(reg, 0, c9, c12, 2)
#define RCP15_PMCNTENSET(reg) MRC15(reg, 0, c9, c12, 1)
#define RCP15_PMCR(reg) MRC15(reg, 0, c9, c12, 0)
#define RCP15_PMINTENCLR(reg) MRC15(reg, 0, c9, c14, 2)
#define RCP15_PMINTENSET(reg) MRC15(reg, 0, c9, c14, 1)
#define RCP15_PMOVSR(reg) MRC15(reg, 0, c9, c12, 3)
#define RCP15_PMRLDR(reg) MRC15(reg, 0, c9, c15, 4)
#define RCP15_PMSELR(reg) MRC15(reg, 0, c9, c12, 5)
#define RCP15_PMSWINC(reg) MRC15(reg, 0, c9, c12, 4)
#define RCP15_PMUSERENR(reg) MRC15(reg, 0, c9, c14, 0)
#define RCP15_PMXEVCNTCR(reg) MRC15(reg, 0, c9, c15, 0)
#define RCP15_PMXEVCNTR(reg) MRC15(reg, 0, c9, c13, 2)
#define RCP15_PMXEVCNTSR(reg) MRC15(reg, 0, c9, c15, 1)
#define RCP15_PMXEVTYPER(reg) MRC15(reg, 0, c9, c13, 1)
#define RCP15_LPM0EVTYPER(reg) MRC15(reg, 0, c15, c0, 0)
#define RCP15_LPM1EVTYPER(reg) MRC15(reg, 1, c15, c0, 0)
#define RCP15_LPM2EVTYPER(reg) MRC15(reg, 2, c15, c0, 0)
#define RCP15_LPM3EVTYPER(reg) MRC15(reg, 3, c15, c0, 0)
#define RCP15_L2LPMEVTYPER(reg) MRC15(reg, 3, c15, c2, 0)
#define RCP15_VLPMEVTYPER(reg) MRC15(reg, 7, c11, c0, 0)
#define RCP15_CONTEXTIDR(reg) MRC15(reg, 0, c13, c0, 1)
#define RCP15_L2CR0(reg) MRC15(reg, 3, c15, c0, 1)
#define RCP15_L2VR3F1(reg) MRC15(reg, 3, c15, c15, 1)
#endif

103
arch/arm/perfmon/l2_cp15_registers.h Normal file
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@@ -0,0 +1,103 @@
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Code Aurora nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
cp15_registers.h
DESCRIPTION: define macros for reading and writing to the cp registers
for the ARMv7
REV/DATE: Fri Mar 18 15:54:32 EST 2005
*/
#ifndef __l2_cp15_registers__
#define __l2_cp15_registers__
#include "mcrmrc.h"
#define WCP15_SDER(reg) MCR15(reg, 0, c1, c1, 1)
/*
* Performance Monitor Registers
*/
#define WCP15_L2MPCR(reg) MCR15(reg, 3, c15, c0, 4)
#define WCP15_L2PMCCNTCR(reg) MCR15(reg, 3, c15, c4, 4)
#define WCP15_L2PMCCNTR(reg) MCR15(reg, 3, c15, c4, 5)
#define WCP15_L2PMCCNTSR(reg) MCR15(reg, 3, c15, c4, 6)
#define WCP15_L2PMCNTENCLR(reg) MCR15(reg, 3, c15, c4, 2)
#define WCP15_L2PMCNTENSET(reg) MCR15(reg, 3, c15, c4, 3)
#define WCP15_L2PMCR(reg) MCR15(reg, 3, c15, c4, 0)
#define WCP15_L2PMINTENCLR(reg) MCR15(reg, 3, c15, c5, 0)
#define WCP15_L2PMINTENSET(reg) MCR15(reg, 3, c15, c5, 1)
#define WCP15_L2PMOVSR(reg) MCR15(reg, 3, c15, c4, 1)
#define WCP15_L2PMRLDR(reg) MCR15(reg, 3, c15, c4, 7)
#define WCP15_L2PMSELR(reg) MCR15(reg, 3, c15, c6, 0)
#define WCP15_L2PMXEVCNTCR(reg) MCR15(reg, 3, c15, c6, 4)
#define WCP15_L2PMXEVCNTR(reg) MCR15(reg, 3, c15, c6, 5)
#define WCP15_L2PMXEVCNTSR(reg) MCR15(reg, 3, c15, c6, 6)
#define WCP15_L2PMXEVTYPER(reg) MCR15(reg, 3, c15, c6, 7)
#define WCP15_L2PMXEVFILTER(reg) MCR15(reg, 3, c15, c6, 3)
#define WCP15_L2PMEVTYPER0(reg) MCR15(reg, 3, c15, c7, 0)
#define WCP15_L2PMEVTYPER1(reg) MCR15(reg, 3, c15, c7, 1)
#define WCP15_L2PMEVTYPER2(reg) MCR15(reg, 3, c15, c7, 2)
#define WCP15_L2PMEVTYPER3(reg) MCR15(reg, 3, c15, c7, 3)
#define WCP15_L2PMEVTYPER4(reg) MCR15(reg, 3, c15, c7, 4)
#define WCP15_L2VR3F1(reg) MCR15(reg, 3, c15, c15, 1)
/*
* READ the registers
*/
#define RCP15_SDER(reg) MRC15(reg, 0, c1, c1, 1)
/*
* Performance Monitor Registers
*/
#define RCP15_L2MPCR(reg) MRC15(reg, 3, c15, c0, 4)
#define RCP15_L2PMCCNTCR(reg) MRC15(reg, 3, c15, c4, 4)
#define RCP15_L2PMCCNTR(reg) MRC15(reg, 3, c15, c4, 5)
#define RCP15_L2PMCCNTSR(reg) MRC15(reg, 3, c15, c4, 6)
#define RCP15_L2PMCNTENCLR(reg) MRC15(reg, 3, c15, c4, 2)
#define RCP15_L2PMCNTENSET(reg) MRC15(reg, 3, c15, c4, 3)
#define RCP15_L2PMCR(reg) MRC15(reg, 3, c15, c4, 0)
#define RCP15_L2PMINTENCLR(reg) MRC15(reg, 3, c15, c5, 0)
#define RCP15_L2PMINTENSET(reg) MRC15(reg, 3, c15, c5, 1)
#define RCP15_L2PMOVSR(reg) MRC15(reg, 3, c15, c4, 1)
#define RCP15_L2PMRLDR(reg) MRC15(reg, 3, c15, c4, 7)
#define RCP15_L2PMSELR(reg) MRC15(reg, 3, c15, c6, 0)
#define RCP15_L2PMXEVCNTCR(reg) MRC15(reg, 3, c15, c6, 4)
#define RCP15_L2PMXEVCNTR(reg) MRC15(reg, 3, c15, c6, 5)
#define RCP15_L2PMXEVCNTSR(reg) MRC15(reg, 3, c15, c6, 6)
#define RCP15_L2PMXEVTYPER(reg) MRC15(reg, 3, c15, c6, 7)
#define RCP15_L2PMXEVFILTER(reg) MRC15(reg, 3, c15, c6, 3)
#define RCP15_L2PMEVTYPER0(reg) MRC15(reg, 3, c15, c7, 0)
#define RCP15_L2PMEVTYPER1(reg) MRC15(reg, 3, c15, c7, 1)
#define RCP15_L2PMEVTYPER2(reg) MRC15(reg, 3, c15, c7, 2)
#define RCP15_L2PMEVTYPER3(reg) MRC15(reg, 3, c15, c7, 3)
#define RCP15_L2PMEVTYPER4(reg) MRC15(reg, 3, c15, c7, 4)
#define RCP15_L2VR3F1(reg) MRC15(reg, 3, c15, c15, 1)
#endif

101
arch/arm/perfmon/mcrmrc.h Normal file
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@@ -0,0 +1,101 @@
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Code Aurora nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
mrcmcr.h
DESCRIPTION: Convenience macros for access the cp registers in the arm.
REV/DATE: Fri Mar 18 16:34:44 EST 2005
*/
#ifndef __mrcmcr__h_
#define __mrcmcr__h_
/*
* Define some convenience macros to acccess the cp registers from c code
* Lots of macro trickery here.
*
* Takes the same format as the asm instructions and unfortunatly you cannot
* use variables to select the crn, crn or op fields...
*
* For those unfamiliar with the # and string stuff.
* # creates a string from the value and any two strings that are beside
* are concatenated...thus these create one big asm string for the
* inline asm code.
*
* When compiled these compile to single asm instructions (fast) but
* without all the hassel of __asm__ __volatile__ (...) =r
*
* Format is:
*
* unsigned long reg; // destination variable
* MRC(reg, p15, 0, c1, c0, 0 );
*
* MRC read control register
* MCR control register write
*/
/*
* Some assembly macros so we can use the same macros as in the C version.
* Turns the ASM code a little C-ish but keeps the code consistent and in
* one location...
*/
#ifdef __ASSEMBLY__
#define MRC(reg, processor, op1, crn, crm, op2) \
(mrc processor , op1 , reg, crn , crm , op2)
#define MCR(reg, processor, op1, crn, crm, op2) \
(mcr processor , op1 , reg, crn , crm , op2)
/*
* C version of the macros.
*/
#else
#define MRC(reg, processor, op1, crn, crm, op2) \
__asm__ __volatile__ ( \
" mrc " #processor "," #op1 ", %0," #crn "," #crm "," #op2 "\n" \
: "=r" (reg))
#define MCR(reg, processor, op1, crn, crm, op2) \
__asm__ __volatile__ ( \
" mcr " #processor "," #op1 ", %0," #crn "," #crm "," #op2 "\n" \
: : "r" (reg))
#endif
/*
* Easy access convenience function to read CP15 registers from c code
*/
#define MRC15(reg, op1, crn, crm, op2) MRC(reg, p15, op1, crn, crm, op2)
#define MCR15(reg, op1, crn, crm, op2) MCR(reg, p15, op1, crn, crm, op2)
#endif

764
arch/arm/perfmon/per-axi.c Normal file
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@@ -0,0 +1,764 @@
/* Copyright (c) 2010, Code Aurora Forum. 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 version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
/*
per-axi
DESCRIPTION
Functions related to AXI bus performance counter manipulations.
*/
#include <linux/io.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/proc_fs.h>
#include "asm/uaccess.h"
#include "per-axi.h"
#include "perf.h"
/*
Definitions for AXI register addresses, macros to set and get register values
*/
#define AXI_BASE_SIZE 0x00004000
#define AXI_REG_BASE (AXI_BASE + 0x00000000)
#define AXI_REG_BASE_PHYS 0xa8200000
#define __inpdw(port) ioread32(port)
#define in_dword_masked(addr, mask) (__inpdw(addr) & (mask))
#define __outpdw(port, val) (iowrite32((uint32_t) (val), port))
#define out_dword(addr, val) __outpdw(addr, val)
#define HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_ADDR \
(AXI_REG_BASE + 0x00003434)
#define HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_RMSK 0xffff
#define HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_IN \
in_dword_masked(HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_ADDR, \
HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_RMSK)
#define HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_ADDR (AXI_REG_BASE + 0x00003438)
#define HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_RMSK 0xffff
#define HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_IN \
in_dword_masked(HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_ADDR, \
HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_RMSK)
#define HWIO_AXI_MONITOR_SELECTION_REG0_ADDR (AXI_REG_BASE + 0x00003428)
#define HWIO_AXI_MONITOR_SELECTION_REG1_ADDR (AXI_REG_BASE + 0x0000342c)
#define HWIO_AXI_MONITOR_TENURE_SELECTION_REG_ADDR (AXI_REG_BASE + 0x00003430)
#define HWIO_AXI_MONITOR_SELECTION_REG0_ETC_BMSK 0x4000
#define HWIO_AXI_MONITOR_SELECTION_REG0_ECC_BMSK 0x2000
#define HWIO_AXI_MONITOR_SELECTION_REG0_EEC1_BMSK 0x800
#define HWIO_AXI_MONITOR_SELECTION_REG0_EEC0_BMSK 0x200
#define HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_OUT(v) \
out_dword(HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_ADDR, v)
#define HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_OUT(v) \
out_dword(HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_ADDR, v)
#define HWIO_AXI_MONITOR_SELECTION_REG0_OUT(v) \
out_dword(HWIO_AXI_MONITOR_SELECTION_REG0_ADDR, v)
#define HWIO_AXI_MONITOR_SELECTION_REG1_OUT(v) \
out_dword(HWIO_AXI_MONITOR_SELECTION_REG1_ADDR, v)
#define HWIO_AXI_MONITOR_TENURE_SELECTION_REG_OUT(v) \
out_dword(HWIO_AXI_MONITOR_TENURE_SELECTION_REG_ADDR, v)
#define HWIO_AXI_MONITOR_SELECTION_REG0_RMSK 0xffff
#define HWIO_AXI_MONITOR_SELECTION_REG0_IN \
in_dword_masked(HWIO_AXI_MONITOR_SELECTION_REG0_ADDR, \
HWIO_AXI_MONITOR_SELECTION_REG0_RMSK)
#define HWIO_AXI_CONFIGURATION_REG_ADDR (AXI_REG_BASE + 0x00000008)
#define HWIO_AXI_CONFIGURATION_REG_OUT(v) \
out_dword(HWIO_AXI_CONFIGURATION_REG_ADDR, v)
#define HWIO_AXI_CONFIGURATION_REG_PPDM_BMSK 0x0
#define HWIO_AXI_CONFIGURATION_REG_DISABLE 0x2
#define AXI_EVTSEL_ENABLE_MASK 0x6a00
#define AXI_EVTSEL_DISABLE_MASK 0x95ff
#define AXI_EVTSEL_RESET_MASK 0xfe40
#define HWIO_AXI_MONITOR_EVENT_LOWER_REG0_ADDR (AXI_REG_BASE + 0x00003450)
#define HWIO_AXI_MONITOR_EVENT_LOWER_REG0_RMSK 0xffff
#define HWIO_AXI_MONITOR_EVENT_LOWER_REG0_SHFT 0
#define HWIO_AXI_MONITOR_EVENT_LOWER_REG0_IN \
in_dword_masked(HWIO_AXI_MONITOR_EVENT_LOWER_REG0_ADDR, \
HWIO_AXI_MONITOR_EVENT_LOWER_REG0_RMSK)
#define HWIO_AXI_MONITOR_EVENT_UPPER_REG0_ADDR (AXI_REG_BASE + 0x00003454)
#define HWIO_AXI_MONITOR_EVENT_UPPER_REG0_RMSK 0xffff
#define HWIO_AXI_MONITOR_EVENT_UPPER_REG0_SHFT 0
#define HWIO_AXI_MONITOR_EVENT_UPPER_REG0_IN \
in_dword_masked(HWIO_AXI_MONITOR_EVENT_UPPER_REG0_ADDR, \
HWIO_AXI_MONITOR_EVENT_UPPER_REG0_RMSK)
#define HWIO_AXI_MONITOR_EVENT_LOWER_REG1_ADDR (AXI_REG_BASE + 0x00003458)
#define HWIO_AXI_MONITOR_EVENT_LOWER_REG1_RMSK 0xffff
#define HWIO_AXI_MONITOR_EVENT_LOWER_REG1_SHFT 0
#define HWIO_AXI_MONITOR_EVENT_LOWER_REG1_IN \
in_dword_masked(HWIO_AXI_MONITOR_EVENT_LOWER_REG1_ADDR, \
HWIO_AXI_MONITOR_EVENT_LOWER_REG1_RMSK)
#define HWIO_AXI_MONITOR_EVENT_UPPER_REG1_ADDR (AXI_REG_BASE + 0x0000345c)
#define HWIO_AXI_MONITOR_EVENT_UPPER_REG1_RMSK 0xffff
#define HWIO_AXI_MONITOR_EVENT_UPPER_REG1_SHFT 0
#define HWIO_AXI_MONITOR_EVENT_UPPER_REG1_IN \
in_dword_masked(HWIO_AXI_MONITOR_EVENT_UPPER_REG1_ADDR, \
HWIO_AXI_MONITOR_EVENT_UPPER_REG1_RMSK)
#define HWIO_AXI_MONITOR_TENURE_LOWER_REG_ADDR (AXI_REG_BASE + 0x00003448)
#define HWIO_AXI_MONITOR_TENURE_LOWER_REG_RMSK 0xffff
#define HWIO_AXI_MONITOR_TENURE_LOWER_REG_SHFT 0
#define HWIO_AXI_MONITOR_TENURE_LOWER_REG_IN \
in_dword_masked(HWIO_AXI_MONITOR_TENURE_LOWER_REG_ADDR, \
HWIO_AXI_MONITOR_TENURE_LOWER_REG_RMSK)
#define HWIO_AXI_MONITOR_TENURE_UPPER_REG_ADDR (AXI_REG_BASE + 0x00003444)
#define HWIO_AXI_MONITOR_TENURE_UPPER_REG_RMSK 0xffff
#define HWIO_AXI_MONITOR_TENURE_UPPER_REG_SHFT 0
#define HWIO_AXI_MONITOR_TENURE_UPPER_REG_IN \
in_dword_masked(HWIO_AXI_MONITOR_TENURE_UPPER_REG_ADDR, \
HWIO_AXI_MONITOR_TENURE_UPPER_REG_RMSK)
#define HWIO_AXI_MONITOR_MIN_REG_ADDR (AXI_REG_BASE + 0x0000343c)
#define HWIO_AXI_MONITOR_MIN_REG_RMSK 0xffff
#define HWIO_AXI_MONITOR_MIN_REG_SHFT 0
#define HWIO_AXI_MONITOR_MIN_REG_IN \
in_dword_masked(HWIO_AXI_MONITOR_MIN_REG_ADDR, \
HWIO_AXI_MONITOR_MIN_REG_RMSK)
#define HWIO_AXI_MONITOR_MAX_REG_ADDR (AXI_REG_BASE + 0x00003440)
#define HWIO_AXI_MONITOR_MAX_REG_RMSK 0xffff
#define HWIO_AXI_MONITOR_MAX_REG_SHFT 0
#define HWIO_AXI_MONITOR_MAX_REG_IN \
in_dword_masked(HWIO_AXI_MONITOR_MAX_REG_ADDR, \
HWIO_AXI_MONITOR_MAX_REG_RMSK)
#define HWIO_AXI_MONITOR_LAST_TENURE_REG_ADDR (AXI_REG_BASE + 0x0000344c)
#define HWIO_AXI_MONITOR_LAST_TENURE_REG_RMSK 0xffff
#define HWIO_AXI_MONITOR_LAST_TENURE_REG_SHFT 0
#define HWIO_AXI_MONITOR_LAST_TENURE_REG_IN \
in_dword_masked(HWIO_AXI_MONITOR_LAST_TENURE_REG_ADDR, \
HWIO_AXI_MONITOR_LAST_TENURE_REG_RMSK)
#define HWIO_AXI_MONITOR_TENURE_UPPER_REG_OUT(v) \
out_dword(HWIO_AXI_MONITOR_TENURE_UPPER_REG_ADDR, v)
#define HWIO_AXI_MONITOR_TENURE_LOWER_REG_OUT(v) \
out_dword(HWIO_AXI_MONITOR_TENURE_LOWER_REG_ADDR, v)
#define HWIO_AXI_RESET_ALL 0x9400
#define HWIO_AXI_ENABLE_ALL_NOCYCLES 0x4a00
#define HWIO_AXI_DISABLE_ALL 0xb500
uint32_t AXI_BASE;
unsigned int is_first = 1;
struct perf_mon_axi_data pm_axi_info;
struct perf_mon_axi_cnts axi_cnts;
/*
FUNCTION get_axi_sel_reg0
DESCRIPTION
Retrieve the value of AXI_SEL_REG0
DEPENDENCIES
RETURN VALUE
AXI_SEL_REG0
SIDE EFFECTS
*/
unsigned long get_axi_sel_reg0(void)
{
return pm_axi_info.sel_reg0;
}
/*
FUNCTION get_axi_sel_reg1
DESCRIPTION
Retrieve the value of AXI_SEL_REG1
DEPENDENCIES
RETURN VALUE
AXI_SEL_REG1
SIDE EFFECTS
*/
unsigned long get_axi_sel_reg1(void)
{
return pm_axi_info.sel_reg1;
}
/*
FUNCTION get_axi_ten_sel_reg
DESCRIPTION
Retrieve the value of AXI_TEN_REG
DEPENDENCIES
RETURN VALUE
AXI_TEN_REG
SIDE EFFECTS
*/
unsigned long get_axi_ten_sel_reg(void)
{
return pm_axi_info.ten_sel_reg;
}
/*
FUNCTION get_axi_valid
DESCRIPTION
Retrieve the value of AXI valid bit
DEPENDENCIES
RETURN VALUE
AXI Valid bit
SIDE EFFECTS
*/
unsigned long get_axi_valid(void)
{
return pm_axi_info.valid;
}
/*
FUNCTION get_axi_enable
DESCRIPTION
Retrieve the value of AXI enable bit
DEPENDENCIES
RETURN VALUE
AXI enable bit
SIDE EFFECTS
*/
unsigned long get_axi_enable(void)
{
return pm_axi_info.enable;
}
/*
FUNCTION get_axi_clear
DESCRIPTION
Retrieve the value of AXI clear bit
DEPENDENCIES
RETURN VALUE
AXI clear bit
SIDE EFFECTS
*/
unsigned long get_axi_clear(void)
{
return pm_axi_info.clear;
}
/*
FUNCTION pm_axi_cnts_write
DESCRIPTION
Write handler for the /proc axi results directory.
DEPENDENCIES
RETURN VALUE
Number of characters to output.
SIDE EFFECTS
*/
int pm_axi_cnts_write(struct file *file, const char *buff,
unsigned long cnt, void *data)
{
char *newbuf;
struct PerfMonAxiCnts *p =
(struct PerfMonAxiCnts *)data;
if (p == 0)
return cnt;
/*
* Alloc the user data in kernel space. and then copy user to kernel
*/
newbuf = kmalloc(cnt + 1, GFP_KERNEL);
if (0 == newbuf)
return cnt;
if (copy_from_user(newbuf, buff, cnt) != 0) {
printk(KERN_INFO "%s copy_from_user failed\n", __func__);
return cnt;
}
return cnt;
}
/*
FUNCTION pm_axi_update_cnts
DESCRIPTION
Read the current AXI counter values. Check for overflows and
adjust the values stored accordingly.
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
void pm_axi_update_cnts(void)
{
if (is_first) {
pm_axi_start();
} else {
if (pm_axi_info.valid == 1) {
pm_axi_info.valid = 0;
pm_axi_update();
} else {
pm_axi_enable();
}
}
is_first = 0;
axi_cnts.cycles += pm_get_axi_cycle_count();
axi_cnts.cnt0 += pm_get_axi_evt0_count();
axi_cnts.cnt1 += pm_get_axi_evt1_count();
axi_cnts.tenure_total += pm_get_axi_ten_total_count();
axi_cnts.tenure_min = pm_get_axi_ten_min_count();
axi_cnts.tenure_max = pm_get_axi_ten_max_count();
axi_cnts.tenure_last = pm_get_axi_ten_last_count();
pm_axi_start();
}
/*
FUNCTION pm_axi_clear_cnts
DESCRIPTION
Clear the locally stored AXI counter values.
Also clear the AXI counter registers.
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
void pm_axi_clear_cnts(void)
{
axi_cnts.cycles = 0;
axi_cnts.cnt0 = 0;
axi_cnts.cnt1 = 0;
axi_cnts.tenure_total = 0;
axi_cnts.tenure_min = 0;
axi_cnts.tenure_max = 0;
axi_cnts.tenure_last = 0;
pm_axi_start();
}
/*
FUNCTION pm_axi_read_decimal
DESCRIPTION
Read handler for the /proc axi results directory in decimal format.
DEPENDENCIES
RETURN VALUE
Number of characters to output.
SIDE EFFECTS
*/
int pm_axi_read_decimal(char *page, char **start, off_t off, int count,
int *eof, void *data)
{
struct perf_mon_axi_cnts *p = (struct perf_mon_axi_cnts *)data;
return sprintf(page, "cnt0:%llu cnt1:%llu tenure:%llu ten_max:%llu \
ten_min:%llu ten_last:%llu cycles:%llu\n",
p->cnt0,
p->cnt1,
p->tenure_total,
p->tenure_max,
p->tenure_min,
p->tenure_last,
p->cycles);
}
/*
FUNCTION pm_axi_read_hex
DESCRIPTION
Read handler for the /proc axi results directory in hex format.
DEPENDENCIES
RETURN VALUE
Number of characters to output.
SIDE EFFECTS
*/
int pm_axi_read_hex(char *page, char **start, off_t off, int count,
int *eof, void *data)
{
struct perf_mon_axi_cnts *p = (struct perf_mon_axi_cnts *)data;
return sprintf(page, "cnt0:%llx cnt1:%llx tenure:%llx ten_max:%llx \
ten_min:%llx ten_last:%llx cycles:%llx\n",
p->cnt0,
p->cnt1,
p->tenure_total,
p->tenure_max,
p->tenure_min,
p->tenure_last,
p->cycles);
}
/*
FUNCTION pm_axi_set_proc_entry
DESCRIPTION
Create a generic entry for the /proc axi settings directory.
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
void pm_axi_set_proc_entry(char *name, unsigned long *var,
struct proc_dir_entry *d, int hex)
{
struct proc_dir_entry *pe;
pe = create_proc_entry(name, 0777, d);
if (0 == pe)
return;
if (hex) {
pe->read_proc = per_process_read;
pe->write_proc = per_process_write_hex;
} else {
pe->read_proc = per_process_read_decimal;
pe->write_proc = per_process_write_dec;
}
pe->data = (void *)var;
}
/*
FUNCTION pm_axi_get_cnt_proc_entry
DESCRIPTION
Create a generic entry for the /proc axi results directory.
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
void pm_axi_get_cnt_proc_entry(char *name, struct perf_mon_axi_cnts *var,
struct proc_dir_entry *d, int hex)
{
struct proc_dir_entry *pe;
pe = create_proc_entry(name, 0777, d);
if (0 == pe)
return;
if (hex) {
pe->read_proc = pm_axi_read_hex;
pe->write_proc = pm_axi_cnts_write;
} else {
pe->read_proc = pm_axi_read_decimal;
pe->write_proc = pm_axi_cnts_write;
}
pe->data = (void *)var;
}
/*
FUNCTION pm_axi_clear_tenure
DESCRIPTION
Clear AXI tenure cntr manually. Temporary solution till hardware bug
is fixed
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
void pm_axi_clear_tenure(void)
{
HWIO_AXI_MONITOR_TENURE_UPPER_REG_OUT(0x0);
HWIO_AXI_MONITOR_TENURE_LOWER_REG_OUT(0x0);
}
/*
FUNCTION pm_axi_init
DESCRIPTION
Map AXI region to virtual memory.
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
void pm_axi_init()
{
/*Map the AXI regs*/
#ifdef CONFIG_ARCH_QSD8X50
{
/*Map the AXI regs*/
AXI_BASE = (uint32_t)ioremap(AXI_REG_BASE_PHYS, AXI_BASE_SIZE);
if (!AXI_BASE)
printk(KERN_ERR "Mem map failed\n");
}
#else
{
AXI_BASE = (uint32_t)kmalloc(AXI_BASE_SIZE, GFP_KERNEL);
}
#endif
}
/*
FUNCTION pm_axi_start
DESCRIPTION
Set event0, event1 and tenure registers based on the /proc entries.
Set cycle cntr to fffffffe to start counters.
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
void
pm_axi_start()
{
unsigned long sel_reg0, sel_reg1, ten_sel_reg;
sel_reg0 = get_axi_sel_reg0();
sel_reg1 = get_axi_sel_reg1();
ten_sel_reg = get_axi_ten_sel_reg();
HWIO_AXI_CONFIGURATION_REG_OUT(HWIO_AXI_CONFIGURATION_REG_PPDM_BMSK);
/*Set AXI Cycle Counter to enable AXI Monitors*/
HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_OUT(0xffff);
HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_OUT(0xfffe);
/*Set master/slave*/
HWIO_AXI_MONITOR_SELECTION_REG1_OUT(sel_reg1);
HWIO_AXI_MONITOR_SELECTION_REG0_OUT(HWIO_AXI_RESET_ALL);
HWIO_AXI_MONITOR_SELECTION_REG0_OUT(HWIO_AXI_ENABLE_ALL_NOCYCLES);
HWIO_AXI_MONITOR_SELECTION_REG0_OUT(HWIO_AXI_MONITOR_SELECTION_REG0_IN
| sel_reg0);
HWIO_AXI_MONITOR_SELECTION_REG0_OUT(HWIO_AXI_MONITOR_SELECTION_REG0_IN
| HWIO_AXI_MONITOR_SELECTION_REG0_ECC_BMSK);
HWIO_AXI_CONFIGURATION_REG_OUT(HWIO_AXI_CONFIGURATION_REG_PPDM_BMSK);
}
/*
FUNCTION pm_axi_update
DESCRIPTION
Set event0, event1 and tenure registers based on the /proc entries.
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
void
pm_axi_update()
{
HWIO_AXI_CONFIGURATION_REG_OUT(HWIO_AXI_CONFIGURATION_REG_PPDM_BMSK);
HWIO_AXI_MONITOR_SELECTION_REG0_OUT(HWIO_AXI_MONITOR_SELECTION_REG0_IN
| HWIO_AXI_RESET_ALL);
HWIO_AXI_MONITOR_SELECTION_REG0_OUT(HWIO_AXI_MONITOR_SELECTION_REG0_IN
& HWIO_AXI_DISABLE_ALL);
pm_axi_start();
}
/*
FUNCTION pm_axi_disable
DESCRIPTION
Disable all cntrs.
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
void
pm_axi_disable(void)
{
unsigned long sel_reg0;
/*Disable cntrs*/
sel_reg0 = get_axi_sel_reg0();
HWIO_AXI_MONITOR_SELECTION_REG0_OUT(sel_reg0 & AXI_EVTSEL_DISABLE_MASK);
/*Disable clk*/
HWIO_AXI_CONFIGURATION_REG_OUT(HWIO_AXI_CONFIGURATION_REG_DISABLE);
}
/*
FUNCTION pm_axi_enable
DESCRIPTION
Enable all cntrs.
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
void
pm_axi_enable(void)
{
unsigned long sel_reg0;
/*Enable cntrs*/
sel_reg0 = get_axi_sel_reg0();
HWIO_AXI_MONITOR_SELECTION_REG0_OUT(sel_reg0 | 0x6a00);
/*Enable clk*/
HWIO_AXI_CONFIGURATION_REG_OUT(HWIO_AXI_CONFIGURATION_REG_PPDM_BMSK);
}
/*
FUNCTION pm_axi_disable_cnts
DESCRIPTION
Read cycle cntr value
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
unsigned long
pm_get_axi_cycle_count(void)
{
if (HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_IN == 0x0 &&
HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_IN == 0x0) {
/*Set AXI Cycle Counter to enable AXI Monitors*/
HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_OUT(0xffff);
HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_OUT(0xfffe);
}
return 0xfffffffe - ((HWIO_AXI_MONITOR_CYCLE_COUNT_UPPER_REG_IN << 16)
+ HWIO_AXI_MONITOR_CYCLE_COUNT_LOWER_REG_IN);
}
/*
FUNCTION pm_get_axi_evt0_count
DESCRIPTION
Read Event0 cntr value
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
unsigned long
pm_get_axi_evt0_count(void)
{
return (HWIO_AXI_MONITOR_EVENT_UPPER_REG0_IN << 16)
+ HWIO_AXI_MONITOR_EVENT_LOWER_REG0_IN;
}
/*
FUNCTION pm_get_axi_evt1_count
DESCRIPTION
Read Event1 cntr value
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
unsigned long
pm_get_axi_evt1_count(void)
{
return (HWIO_AXI_MONITOR_EVENT_UPPER_REG1_IN << 16)
+ HWIO_AXI_MONITOR_EVENT_LOWER_REG1_IN;
}
/*
FUNCTION pm_get_axi_ten_min_count
DESCRIPTION
Read min tenure cntr value
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
unsigned long
pm_get_axi_ten_min_count(void)
{
return HWIO_AXI_MONITOR_MIN_REG_IN;
}
/*
FUNCTION pm_get_axi_ten_max_count
DESCRIPTION
Read max tenure cntr value
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
unsigned long
pm_get_axi_ten_max_count(void)
{
return HWIO_AXI_MONITOR_MAX_REG_IN;
}
/*
FUNCTION pm_get_axi_ten_total_count
DESCRIPTION
Read total tenure cntr value
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
unsigned long
pm_get_axi_ten_total_count(void)
{
return (HWIO_AXI_MONITOR_TENURE_UPPER_REG_IN << 16)
+ HWIO_AXI_MONITOR_TENURE_LOWER_REG_IN;
}
/*
FUNCTION pm_get_axi_ten_last_count
DESCRIPTION
Read last tenure cntr value
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
unsigned long
pm_get_axi_ten_last_count(void)
{
return HWIO_AXI_MONITOR_LAST_TENURE_REG_IN;
}

91
arch/arm/perfmon/per-axi.h Normal file
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@@ -0,0 +1,91 @@
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Code Aurora nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
*per-axi
*DESCRIPTION
*Header File for Functions related to AXI bus performance counter manipulations.
*/
#ifndef __PER_AXI_H__
#define __PER_AXI_H__
unsigned long pm_get_axi_cycle_count(void);
unsigned long pm_get_axi_evt0_count(void);
unsigned long pm_get_axi_evt1_count(void);
unsigned long pm_get_axi_evt2_count(void);
unsigned long pm_get_axi_ten_min_count(void);
unsigned long pm_get_axi_ten_max_count(void);
unsigned long pm_get_axi_ten_total_count(void);
unsigned long pm_get_axi_ten_last_count(void);
unsigned long get_axi_sel_reg0(void);
unsigned long get_axi_sel_seg1(void);
unsigned long get_axi_ten_sel_reg(void);
unsigned long get_axi_valid(void);
unsigned long get_axi_enable(void);
unsigned long get_axi_clear(void);
void pm_axi_clear_cnts(void);
void pm_axi_update_cnts(void);
void pm_axi_init(void);
void pm_axi_start(void);
void pm_axi_update(void);
void pm_axi_disable(void);
void pm_axi_enable(void);
struct perf_mon_axi_cnts{
unsigned long long cycles;
unsigned long long cnt0;
unsigned long long cnt1;
unsigned long long tenure_total;
unsigned long long tenure_min;
unsigned long long tenure_max;
unsigned long long tenure_last;
};
struct perf_mon_axi_data{
struct proc_dir_entry *proc;
unsigned long enable;
unsigned long clear;
unsigned long valid;
unsigned long sel_reg0;
unsigned long sel_reg1;
unsigned long ten_sel_reg;
unsigned long refresh;
};
extern struct perf_mon_axi_data pm_axi_info;
extern struct perf_mon_axi_cnts axi_cnts;
void pm_axi_set_proc_entry(char *name, unsigned long *var,
struct proc_dir_entry *d, int hex);
void pm_axi_get_cnt_proc_entry(char *name, struct perf_mon_axi_cnts *var,
struct proc_dir_entry *d, int hex);
#endif

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arch/arm/perfmon/per.c Normal file
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/* Copyright (c) 2010, Code Aurora Forum. 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 version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
/*
per.c
DESCRIPTION: Performance count interface for linux via proc in the T32
command file style
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/sysrq.h>
#include <linux/time.h>
#include "linux/proc_fs.h"
#include "linux/kernel_stat.h"
#include "asm/uaccess.h"
#include "cp15_registers.h"
#include "perf.h"
#define PM_PER_ERR -1
/*
FUNCTION perf_if_proc_init
DESCRIPTION Initialize the proc interface for thje performance data.
*/
static __init int per_init(void)
{
if (atomic_read(&pm_op_lock) == 1) {
printk(KERN_INFO "Can not load KSAPI, monitors are in use\n");
return PM_PER_ERR;
}
atomic_set(&pm_op_lock, 1);
per_process_perf_init();
printk(KERN_INFO "ksapi init\n");
return 0;
}
static void __exit per_exit(void)
{
per_process_perf_exit();
printk(KERN_INFO "ksapi exit\n");
atomic_set(&pm_op_lock, 0);
}
MODULE_LICENSE("GPL v2");
module_init(per_init);
module_exit(per_exit);

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/* Copyright (c) 2010, Code Aurora Forum. 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 version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
/*
* perf-function-hooks.c
* DESCRIPTION
* Hooks for ksapi.ko
*/
#include <linux/module.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/sysrq.h>
#include <linux/time.h>
#include "linux/proc_fs.h"
#include "linux/kernel_stat.h"
#include "asm/uaccess.h"
#include <linux/proc_fs.h>
#include "cp15_registers.h"
#include <asm/perftypes.h>
#include "perf.h"
/*
* Function Pointers for when the module is installed...
* Should we use a single "ready" variable for the testing
* in the functions below, will be safer when module is removed
* testing for a locked variable...
*/
VPVF pp_interrupt_out_ptr;
VPVF pp_interrupt_in_ptr;
VPULF pp_process_remove_ptr;
unsigned int pp_loaded;
EXPORT_SYMBOL(pp_loaded);
atomic_t pm_op_lock;
EXPORT_SYMBOL(pm_op_lock);
/*
FUNCTION VARIOUS
DESCRIPTION
Hooks to callinto the module functions after they are loaded. The
above pointers will be set and then these functions are ready to be
called.
DEPENDENCIES
THe per preocess performance monitor needs to be loaded ...
RETURN VALUE
SIDE EFFECTS
*/
void perf_mon_interrupt_out(void)
{
if (pp_loaded)
(*pp_interrupt_out_ptr)();
}
EXPORT_SYMBOL(pp_interrupt_out_ptr);
void perf_mon_interrupt_in(void)
{
if (pp_loaded)
(*pp_interrupt_in_ptr)();
}
EXPORT_SYMBOL(pp_interrupt_in_ptr);
void per_process_remove(unsigned long pid)
{
if (pp_loaded)
(*pp_process_remove_ptr)(pid);
}
EXPORT_SYMBOL(pp_process_remove_ptr);

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/* Copyright (c) 2010, Code Aurora Forum. 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 version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
/*
perf-smp.c
DESCRIPTION
Manipulation, initialization of the ARMV7 Performance counter register.
EXTERNALIZED FUNCTIONS
INITIALIZATION AND SEQUENCING REQUIREMENTS
*/
/*
INCLUDE FILES FOR MODULE
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/time.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/irq.h>
#include "l2_cp15_registers.h"
/*
DEFINITIONS AND DECLARATIONS FOR MODULE
This section contains definitions for constants, macros, types, variables
and other items needed by this module.
*/
/*
Constant / Define Declarations
*/
#define PM_NUM_COUNTERS 4
#define L2_PM_ERR -1
/*------------------------------------------------------------------------
* Global control bits
------------------------------------------------------------------------*/
#define PM_L2_GLOBAL_ENABLE (1<<0)
#define PM_L2_EVENT_RESET (1<<1)
#define PM_L2_CYCLE_RESET (1<<2)
#define PM_L2_CLKDIV (1<<3)
#define PM_L2_GLOBAL_TRACE (1<<4)
#define PM_L2_DISABLE_PROHIBIT (1<<5)
/*---------------------------------------------------------------------------
* Enable and clear bits for each event/trigger
----------------------------------------------------------------------------*/
#define PM_L2EV0_ENABLE (1<<0)
#define PM_L2EV1_ENABLE (1<<1)
#define PM_L2EV2_ENABLE (1<<2)
#define PM_L2EV3_ENABLE (1<<3)
#define PM_L2_COUNT_ENABLE (1<<31)
#define PM_L2_ALL_ENABLE (0x8000000F)
/*-----------------------------------------------------------------------------
* Overflow actions
------------------------------------------------------------------------------*/
#define PM_L2_OVERFLOW_NOACTION (0)
#define PM_L2_OVERFLOW_HALT (1)
#define PM_L2_OVERFLOW_STOP (2)
#define PM_L2_OVERFLOW_SKIP (3)
/*
* Shifts for each trigger type
*/
#define PM_STOP_SHIFT 24
#define PM_RELOAD_SHIFT 22
#define PM_RESUME_SHIFT 20
#define PM_SUSPEND_SHIFT 18
#define PM_START_SHIFT 16
#define PM_STOPALL_SHIFT 15
#define PM_STOPCOND_SHIFT 12
#define PM_RELOADCOND_SHIFT 9
#define PM_RESUMECOND_SHIFT 6
#define PM_SUSPENDCOND_SHIFT 3
#define PM_STARTCOND_SHIFT 0
/*---------------------------------------------------------------------------
External control register. What todo when various events happen.
Triggering events, etc.
----------------------------------------------------------------------------*/
#define PM_EXTTR0 0
#define PM_EXTTR1 1
#define PM_EXTTR2 2
#define PM_EXTTR3 3
#define PM_COND_NO_STOP 0
#define PM_COND_STOP_CNTOVRFLW 1
#define PM_COND_STOP_EXTERNAL 4
#define PM_COND_STOP_TRACE 5
#define PM_COND_STOP_EVOVRFLW 6
#define PM_COND_STOP_EVTYPER 7
/*--------------------------------------------------------------------------
Protect against concurrent access. There is an index register that is
used to select the appropriate bank of registers. If multiple processes
are writting this at different times we could have a mess...
---------------------------------------------------------------------------*/
#define PM_LOCK()
#define PM_UNLOCK()
#define PRINT printk
/*--------------------------------------------------------------------------
The Event definitions
--------------------------------------------------------------------------*/
#define L2PM_EVT_PM0_EVT0 0x00
#define L2PM_EVT_PM0_EVT1 0x01
#define L2PM_EVT_PM0_EVT2 0x02
#define L2PM_EVT_PM0_EVT3 0x03
#define L2PM_EVT_PM1_EVT0 0x04
#define L2PM_EVT_PM1_EVT1 0x05
#define L2PM_EVT_PM1_EVT2 0x06
#define L2PM_EVT_PM1_EVT3 0x07
#define L2PM_EVT_PM2_EVT0 0x08
#define L2PM_EVT_PM2_EVT1 0x09
#define L2PM_EVT_PM2_EVT2 0x0a
#define L2PM_EVT_PM2_EVT3 0x0b
#define L2PM_EVT_PM3_EVT0 0x0c
#define L2PM_EVT_PM3_EVT1 0x0d
#define L2PM_EVT_PM3_EVT2 0x0e
#define L2PM_EVT_PM3_EVT3 0x0f
#define L2PM_EVT_PM4_EVT0 0x10
#define L2PM_EVT_PM4_EVT1 0x11
#define L2PM_EVT_PM4_EVT2 0x12
#define L2PM_EVT_PM4_EVT3 0x13
/*
Type Declarations
*/
/*
Local Object Definitions
*/
unsigned long l2_pm_cycle_overflow_count;
unsigned long l2_pm_overflow_count[PM_NUM_COUNTERS];
/*---------------------------------------------------------------------------
Max number of events read from the config registers
---------------------------------------------------------------------------*/
static int pm_l2_max_events;
static int irqid;
/*
Function Definitions
*/
/*
FUNCTION l2_pm_group_stop
DESCRIPTION Stop a group of the performance monitors. Event monitor 0 is bit
0, event monitor 1 bit 1, etc. The cycle count can also be disable with
bit 31. Macros are provided for all of the indexes including an ALL.
DEPENDENCIES
RETURN VALUE
None
SIDE EFFECTS
Stops the performance monitoring for the index passed.
*/
void pm_l2_group_stop(unsigned long mask)
{
WCP15_L2PMCNTENCLR(mask);
}
/*
FUNCTION l2_pm_group_start
DESCRIPTION Start a group of the performance monitors. Event monitor 0 is bit
0, event monitor 1 bit 1, etc. The cycle count can also be enabled with
bit 31. Macros are provided for all of the indexes including an ALL.
DEPENDENCIES
RETURN VALUE
None
SIDE EFFECTS
Starts the performance monitoring for the index passed.
*/
void pm_l2_group_start(unsigned long mask)
{
WCP15_L2PMCNTENSET(mask);
}
/*
FUNCTION l2_pm_get_overflow
DESCRIPTION Return the overflow condition for the index passed.
DEPENDENCIES
RETURN VALUE
0 no overflow
!0 (anything else) overflow;
SIDE EFFECTS
*/
unsigned long l2_pm_get_overflow(int index)
{
unsigned long overflow = 0;
/*
* Range check
*/
if (index > pm_l2_max_events)
return L2_PM_ERR;
RCP15_L2PMOVSR(overflow);
return overflow & (1<<index);
}
/*
FUNCTION l2_pm_get_cycle_overflow
DESCRIPTION
Returns if the cycle counter has overflowed or not.
DEPENDENCIES
RETURN VALUE
0 no overflow
!0 (anything else) overflow;
SIDE EFFECTS
*/
unsigned long l2_pm_get_cycle_overflow(void)
{
unsigned long overflow = 0;
RCP15_L2PMOVSR(overflow);
return overflow & PM_L2_COUNT_ENABLE;
}
/*
FUNCTION l2_pm_reset_overflow
DESCRIPTION Reset the cycle counter overflow bit.
DEPENDENCIES
RETURN VALUE
None
SIDE EFFECTS
*/
void l2_pm_reset_overflow(int index)
{
WCP15_L2PMOVSR(1<<index);
}
/*
FUNCTION l2_pm_reset_cycle_overflow
DESCRIPTION Reset the cycle counter overflow bit.
DEPENDENCIES
RETURN VALUE
None
SIDE EFFECTS
*/
void l2_pm_reset_cycle_overflow(void)
{
WCP15_L2PMOVSR(PM_L2_COUNT_ENABLE);
}
/*
FUNCTION l2_pm_get_cycle_count
DESCRIPTION return the count in the cycle count register.
DEPENDENCIES
RETURN VALUE
The value in the cycle count register.
SIDE EFFECTS
*/
unsigned long l2_pm_get_cycle_count(void)
{
unsigned long cnt = 0;
RCP15_L2PMCCNTR(cnt);
return cnt;
}
/*
FUNCTION l2_pm_reset_cycle_count
DESCRIPTION reset the value in the cycle count register
DEPENDENCIES
RETURN VALUE
NONE
SIDE EFFECTS
Resets the performance monitor cycle count register.
Any interrupts period based on this overflow will be changed
*/
void l2_pm_reset_cycle_count(void)
{
WCP15_L2PMCNTENCLR(PM_L2_COUNT_ENABLE);
}
/*
FUNCTION l2_pm_cycle_div_64
DESCRIPTION Set the cycle counter to count every 64th cycle instead of
every cycle when the value passed is 1, otherwise counts every cycle.
DEPENDENCIES
RETURN VALUE
none
SIDE EFFECTS
Changes the rate at which cycles are counted. Anything that is reading
the cycle count (pmGetCyucleCount) may get different results.
*/
void l2_pm_cycle_div_64(int enable)
{
unsigned long enables = 0;
RCP15_L2PMCR(enables);
if (enable)
WCP15_L2PMCR(enables | PM_L2_CLKDIV);
else
WCP15_L2PMCR(enables & ~PM_L2_CLKDIV);
}
/*
FUNCTION l2_pm_enable_cycle_counter
DESCRIPTION Enable the cycle counter. Sets the bit in the enable register
so the performance monitor counter starts up counting.
DEPENDENCIES
RETURN VALUE
none
SIDE EFFECTS
*/
void l2_pm_enable_cycle_counter(void)
{
/*
* Enable the counter.
*/
WCP15_L2PMCNTENSET(PM_L2_COUNT_ENABLE);
}
/*
FUNCTION l2_pm_disable_counter
DESCRIPTION Disable a single counter based on the index passed.
DEPENDENCIES
RETURN VALUE
none
SIDE EFFECTS
Any triggers that are based on the stoped counter may not trigger...
*/
void l2_pm_disable_counter(int index)
{
/*
* Range check
*/
if (index > pm_l2_max_events)
return;
WCP15_L2PMCNTENCLR(1<<index);
}
/*
FUNCTION l2_pm_enable_counter
DESCRIPTION Enable the counter with the index passed.
DEPENDENCIES
RETURN VALUE
none.
SIDE EFFECTS
*/
void l2_pm_enable_counter(int index)
{
/*
* Range check
*/
if (index > pm_l2_max_events)
return;
WCP15_L2PMCNTENSET(1<<index);
}
/*
FUNCTION l2_pm_set_count
DESCRIPTION Set the number of events in a register, used for resets
passed.
DEPENDENCIES
RETURN VALUE
-1 if the index is out of range
SIDE EFFECTS
*/
int l2_pm_set_count(int index, unsigned long new_value)
{
unsigned long reg = 0;
/*
* Range check
*/
if (index > pm_l2_max_events)
return L2_PM_ERR;
/*
* Lock, select the index and read the count...unlock
*/
PM_LOCK();
WCP15_L2PMSELR(index);
WCP15_L2PMXEVCNTR(new_value);
PM_UNLOCK();
return reg;
}
int l2_pm_reset_count(int index)
{
return l2_pm_set_count(index, 0);
}
/*
FUNCTION l2_pm_get_count
DESCRIPTION Return the number of events that have happened for the index
passed.
DEPENDENCIES
RETURN VALUE
-1 if the index is out of range
The number of events if inrange
SIDE EFFECTS
*/
unsigned long l2_pm_get_count(int index)
{
unsigned long reg = 0;
/*
* Range check
*/
if (index > pm_l2_max_events)
return L2_PM_ERR;
/*
* Lock, select the index and read the count...unlock
*/
PM_LOCK();
WCP15_L2PMSELR(index);
RCP15_L2PMXEVCNTR(reg);
PM_UNLOCK();
return reg;
}
unsigned long get_filter_code(unsigned long event)
{
if (event == 0x0 || event == 0x4 || event == 0x08
|| event == 0x0c || event == 0x10)
return 0x0001003f;
else if (event == 0x1 || event == 0x5 || event == 0x09
|| event == 0x0d || event == 0x11)
return 0x0002003f;
else if (event == 0x2 || event == 0x6 || event == 0x0a
|| event == 0x0e || event == 0x12)
return 0x0004003f;
else if (event == 0x3 || event == 0x7 || event == 0x0b
|| event == 0x0f || event == 0x13)
return 0x0008003f;
else
return 0;
}
int l2_pm_set_event(int index, unsigned long event)
{
unsigned long reg = 0;
/*
* Range check
*/
if (index > pm_l2_max_events)
return L2_PM_ERR;
/*
* Lock, select the index and read the count...unlock
*/
PM_LOCK();
WCP15_L2PMSELR(index);
WCP15_L2PMXEVTYPER(event);
/* WCP15_L2PMXEVFILTER(get_filter_code(event)); */
WCP15_L2PMXEVFILTER(0x000f003f);
PM_UNLOCK();
return reg;
}
/*
FUNCTION pm_set_local_bu
DESCRIPTION Set the local BU triggers. Note that the MSB determines if
these are enabled or not.
DEPENDENCIES
RETURN VALUE
NONE
SIDE EFFECTS
*/
void pm_set_local_bu(unsigned long value)
{
WCP15_L2PMEVTYPER0(value);
}
/*
FUNCTION pm_set_local_cb
DESCRIPTION Set the local CB triggers. Note that the MSB determines if
these are enabled or not.
DEPENDENCIES
RETURN VALUE
NONE
SIDE EFFECTS
*/
void pm_set_local_cb(unsigned long value)
{
WCP15_L2PMEVTYPER1(value);
}
/*
FUNCTION pm_set_local_mp
DESCRIPTION Set the local MP triggers. Note that the MSB determines if
these are enabled or not.
DEPENDENCIES
RETURN VALUE
NONE
SIDE EFFECTS
*/
void pm_set_local_mp(unsigned long value)
{
WCP15_L2PMEVTYPER2(value);
}
/*
FUNCTION pm_set_local_sp
DESCRIPTION Set the local SP triggers. Note that the MSB determines if
these are enabled or not.
DEPENDENCIES
RETURN VALUE
NONE
SIDE EFFECTS
*/
void pm_set_local_sp(unsigned long value)
{
WCP15_L2PMEVTYPER3(value);
}
/*
FUNCTION pm_set_local_scu
DESCRIPTION Set the local SCU triggers. Note that the MSB determines if
these are enabled or not.
DEPENDENCIES
RETURN VALUE
NONE
SIDE EFFECTS
*/
void pm_set_local_scu(unsigned long value)
{
WCP15_L2PMEVTYPER4(value);
}
/*
FUNCTION l2_pm_isr
DESCRIPTION:
Performance Monitor interrupt service routine to capture overflows
DEPENDENCIES
RETURN VALUE
SIDE EFFECTS
*/
static irqreturn_t l2_pm_isr(int irq, void *d)
{
int i;
for (i = 0; i < PM_NUM_COUNTERS; i++) {
if (l2_pm_get_overflow(i)) {
l2_pm_overflow_count[i]++;
l2_pm_reset_overflow(i);
}
}
if (l2_pm_get_cycle_overflow()) {
l2_pm_cycle_overflow_count++;
l2_pm_reset_cycle_overflow();
}
return IRQ_HANDLED;
}
void l2_pm_stop_all(void)
{
WCP15_L2PMCNTENCLR(0xFFFFFFFF);
}
void l2_pm_reset_all(void)
{
WCP15_L2PMCR(0xF);
WCP15_L2PMOVSR(PM_L2_ALL_ENABLE); /* overflow clear */
}
void l2_pm_start_all(void)
{
WCP15_L2PMCNTENSET(PM_L2_ALL_ENABLE);
}
/*
FUNCTION l2_pm_initialize
DESCRIPTION Initialize the performanca monitoring for the v7 processor.
Ensures the cycle count is running and the event counters are enabled.
DEPENDENCIES
RETURN VALUE
NONE
SIDE EFFECTS
*/
void l2_pm_initialize(void)
{
unsigned long reg = 0;
unsigned char imp;
unsigned char id;
unsigned char num;
unsigned long enables = 0;
static int initialized;
if (initialized)
return;
initialized = 1;
#ifdef CONFIG_ARCH_QSD8X50
irqid = INT_ARM11_PM;
#endif
#ifdef CONFIG_ARCH_MSM7X30
irqid = INT_ARM11_PM;
#endif
#ifdef CONFIG_ARCH_MSM8X60
irqid = CPU_SICCPUXPERFMONIRPTREQ;
#endif
RCP15_L2PMCR(reg);
imp = (reg>>24) & 0xFF;
id = (reg>>16) & 0xFF;
pm_l2_max_events = num = (reg>>11) & 0xFF;
PRINT("V7 MP L2SCU Performance Monitor Capabilities\n");
PRINT(" Implementor %c(%d)\n", imp, imp);
PRINT(" Id %d %x\n", id, id);
PRINT(" Num Events %d %x\n", num, num);
PRINT("\nCycle counter enabled by default...\n");
/*
* Global enable, ensure the global enable is set so all
* subsequent actions take effect. Also resets the counts
*/
RCP15_L2PMCR(enables);
WCP15_L2PMCR(enables | PM_L2_GLOBAL_ENABLE | PM_L2_EVENT_RESET |
PM_L2_CYCLE_RESET | PM_L2_CLKDIV);
/*
* Enable access from user space
*/
/*
* Install interrupt handler and the enable the interrupts
*/
l2_pm_reset_cycle_overflow();
l2_pm_reset_overflow(0);
l2_pm_reset_overflow(1);
l2_pm_reset_overflow(2);
l2_pm_reset_overflow(3);
l2_pm_reset_overflow(4);
if (0 != request_irq(irqid, l2_pm_isr, 0, "l2perfmon", 0))
printk(KERN_ERR "%s:%d request_irq returned error\n",
__FILE__, __LINE__);
WCP15_L2PMINTENSET(PM_L2_ALL_ENABLE);
/*
* Enable the cycle counter. Default, count 1:1 no divisor.
*/
l2_pm_enable_cycle_counter();
}
void l2_pm_free_irq(void)
{
free_irq(irqid, 0);
}
void l2_pm_deinitialize(void)
{
unsigned long enables = 0;
RCP15_L2PMCR(enables);
WCP15_L2PMCR(enables & ~PM_L2_GLOBAL_ENABLE);
}

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/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Code Aurora nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
perf.h
DESCRIPTION: Reads and writes the performance monitoring registers in the ARM
by using the MRC and MCR instructions.
*/
#ifndef PERF_H
#define PERF_H
extern unsigned long perf_get_cycles(void);
extern void perf_set_count1(unsigned long val);
extern void perf_set_count0(unsigned long val);
extern unsigned long perf_get_count1(void);
extern unsigned long perf_get_count0(void);
extern unsigned long perf_get_ctrl(void);
extern void perf_set_ctrl(void);
extern void perf_set_ctrl_with(unsigned long v);
extern void perf_enable_counting(void);
extern void perf_disable_counting(void);
extern void perf_set_divider(int d);
extern unsigned long perf_get_overflow(void);
extern void perf_clear_overflow(unsigned long bit);
extern void perf_export_event(unsigned long bit);
extern void perf_reset_counts(void);
extern int perf_set_event(unsigned long index, unsigned long val);
extern unsigned long perf_get_count(unsigned long index);
extern void perf_set_cycles(unsigned long c);
extern void pm_stop_all(void);
extern void l2_pm_stop_all(void);
extern void pm_start_all(void);
extern void l2_pm_start_all(void);
extern void pm_reset_all(void);
extern void l2_pm_reset_all(void);
extern void pm_set_event(unsigned long monitorIndex, unsigned long eventIndex);
extern void l2_pm_set_event(unsigned long monitorIndex,
unsigned long eventIndex);
extern unsigned long pm_get_count(unsigned long monitorIndex);
extern unsigned long l2_pm_get_count(unsigned long monitorIndex);
extern unsigned long pm_get_cycle_count(void);
extern unsigned long l2_pm_get_cycle_count(void);
extern char *pm_find_event_name(unsigned long index);
extern void pm_set_local_iu(unsigned long events);
extern void pm_set_local_xu(unsigned long events);
extern void pm_set_local_su(unsigned long events);
extern void pm_set_local_l2(unsigned long events);
extern void pm_set_local_vu(unsigned long events);
extern void pm_set_local_bu(unsigned long events);
extern void pm_set_local_cb(unsigned long events);
extern void pm_set_local_mp(unsigned long events);
extern void pm_set_local_sp(unsigned long events);
extern void pm_set_local_scu(unsigned long events);
extern void pm_initialize(void);
extern void pm_deinitialize(void);
extern void l2_pm_initialize(void);
extern void l2_pm_deinitialize(void);
extern void pm_free_irq(void);
extern void l2_pm_free_irq(void);
extern int per_process_perf_init(void);
extern void per_process_perf_exit(void);
int per_process_read(char *page, char **start, off_t off, int count,
int *eof, void *data);
int per_process_write_hex(struct file *file, const char *buff,
unsigned long cnt, void *data);
int per_process_read_decimal(char *page, char **start, off_t off, int count,
int *eof, void *data);
int per_process_write_dec(struct file *file, const char *buff,
unsigned long cnt, void *data);
void perfmon_register_callback(void);
void _per_process_switch(unsigned long oldPid, unsigned long newPid);
extern unsigned int pp_loaded;
extern atomic_t pm_op_lock;
#endif /*PERF_H*/