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Commit 25fc530e authored by Olof Johansson's avatar Olof Johansson Committed by Paul Mackerras
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[POWERPC] pasemi: PA6T oprofile support 



Oprofile support for PA6T, kernel side.

Also rename the PA6T_SPRN.* defines to SPRN_PA6T.*.

Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 7e8bddf5

arch/powerpc/kernel/cputable.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -389,6 +389,8 @@ static struct cpu_spec cpu_specs[] = { 
		.pmc_type		= PPC_PMC_PA6T,

		.pmc_type		= PPC_PMC_PA6T,

		.cpu_setup		= __setup_cpu_pa6t,

		.cpu_setup		= __setup_cpu_pa6t,

		.cpu_restore		= __restore_cpu_pa6t,

		.cpu_restore		= __restore_cpu_pa6t,

		.oprofile_cpu_type	= "ppc64/pa6t",

		.oprofile_type		= PPC_OPROFILE_PA6T,

		.platform		= "pa6t",

		.platform		= "pa6t",

	},

	},

	{	/* default match */

	{	/* default match */

arch/powerpc/kernel/sysfs.c

+6 −6
Original line number Original line Diff line number Diff line
@@ -189,12 +189,12 @@ SYSFS_PMCSETUP(purr, SPRN_PURR); 
SYSFS_PMCSETUP(spurr, SPRN_SPURR);

SYSFS_PMCSETUP(spurr, SPRN_SPURR);

SYSFS_PMCSETUP(dscr, SPRN_DSCR);

SYSFS_PMCSETUP(dscr, SPRN_DSCR);





SYSFS_PMCSETUP(pa6t_pmc0, PA6T_SPRN_PMC0);

SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);

SYSFS_PMCSETUP(pa6t_pmc1, PA6T_SPRN_PMC1);

SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);

SYSFS_PMCSETUP(pa6t_pmc2, PA6T_SPRN_PMC2);

SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);

SYSFS_PMCSETUP(pa6t_pmc3, PA6T_SPRN_PMC3);

SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);

SYSFS_PMCSETUP(pa6t_pmc4, PA6T_SPRN_PMC4);

SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);

SYSFS_PMCSETUP(pa6t_pmc5, PA6T_SPRN_PMC5);

SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);









static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);

static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);

arch/powerpc/oprofile/Makefile

+1 −1
Original line number Original line Diff line number Diff line
@@ -12,6 +12,6 @@ DRIVER_OBJS := $(addprefix ../../../drivers/oprofile/, \ 




oprofile-y := $(DRIVER_OBJS) common.o backtrace.o

oprofile-y := $(DRIVER_OBJS) common.o backtrace.o

oprofile-$(CONFIG_PPC_CELL_NATIVE) += op_model_cell.o

oprofile-$(CONFIG_PPC_CELL_NATIVE) += op_model_cell.o

oprofile-$(CONFIG_PPC64) += op_model_rs64.o op_model_power4.o

oprofile-$(CONFIG_PPC64) += op_model_rs64.o op_model_power4.o op_model_pa6t.o

oprofile-$(CONFIG_FSL_BOOKE) += op_model_fsl_booke.o

oprofile-$(CONFIG_FSL_BOOKE) += op_model_fsl_booke.o

oprofile-$(CONFIG_6xx) += op_model_7450.o
 
oprofile-$(CONFIG_6xx) += op_model_7450.o

arch/powerpc/oprofile/common.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -160,6 +160,9 @@ int __init oprofile_arch_init(struct oprofile_operations *ops) 
		case PPC_OPROFILE_POWER4:

		case PPC_OPROFILE_POWER4:

			model = &op_model_power4;

			model = &op_model_power4;

			break;

			break;

		case PPC_OPROFILE_PA6T:

			model = &op_model_pa6t;

			break;

#endif

#endif

#ifdef CONFIG_6xx

#ifdef CONFIG_6xx

		case PPC_OPROFILE_G4:

		case PPC_OPROFILE_G4:

arch/powerpc/oprofile/op_model_pa6t.c

0 → 100644
+234 −0
Original line number Original line Diff line number Diff line 
/*

 * Copyright (C) 2006-2007 PA Semi, Inc

 *

 * Author: Shashi Rao, PA Semi

 *

 * Maintained by: Olof Johansson <olof@lixom.net>

 *

 * Based on arch/powerpc/oprofile/op_model_power4.c

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

 */



#include <linux/oprofile.h>

#include <linux/init.h>

#include <linux/smp.h>

#include <linux/percpu.h>

#include <asm/processor.h>

#include <asm/cputable.h>

#include <asm/oprofile_impl.h>

#include <asm/reg.h>



static unsigned char oprofile_running;



/* mmcr values are set in pa6t_reg_setup, used in pa6t_cpu_setup */

static u64 mmcr0_val;

static u64 mmcr1_val;



/* inited in pa6t_reg_setup */

static u64 reset_value[OP_MAX_COUNTER];



static inline u64 ctr_read(unsigned int i)

{

	switch (i) {

	case 0:

		return mfspr(SPRN_PA6T_PMC0);

	case 1:

		return mfspr(SPRN_PA6T_PMC1);

	case 2:

		return mfspr(SPRN_PA6T_PMC2);

	case 3:

		return mfspr(SPRN_PA6T_PMC3);

	case 4:

		return mfspr(SPRN_PA6T_PMC4);

	case 5:

		return mfspr(SPRN_PA6T_PMC5);

	default:

		printk(KERN_ERR "ctr_read called with bad arg %u\n", i);

		return 0;

	}

}



static inline void ctr_write(unsigned int i, u64 val)

{

	switch (i) {

	case 0:

		mtspr(SPRN_PA6T_PMC0, val);

		break;

	case 1:

		mtspr(SPRN_PA6T_PMC1, val);

		break;

	case 2:

		mtspr(SPRN_PA6T_PMC2, val);

		break;

	case 3:

		mtspr(SPRN_PA6T_PMC3, val);

		break;

	case 4:

		mtspr(SPRN_PA6T_PMC4, val);

		break;

	case 5:

		mtspr(SPRN_PA6T_PMC5, val);

		break;

	default:

		printk(KERN_ERR "ctr_write called with bad arg %u\n", i);

		break;

	}

}





/* precompute the values to stuff in the hardware registers */

static void pa6t_reg_setup(struct op_counter_config *ctr,

			   struct op_system_config *sys,

			   int num_ctrs)

{

	int pmc;



	/*

	 * adjust the mmcr0.en[0-5] and mmcr0.inten[0-5] values obtained from the

	 * event_mappings file by turning off the counters that the user doesn't

	 * care about

	 *

	 * setup user and kernel profiling

	 */

	for (pmc = 0; pmc < cur_cpu_spec->num_pmcs; pmc++)

		if (!ctr[pmc].enabled) {

			sys->mmcr0 &= ~(0x1UL << pmc);

			sys->mmcr0 &= ~(0x1UL << (pmc+12));

			pr_debug("turned off counter %u\n", pmc);

		}



	if (sys->enable_kernel)

		sys->mmcr0 |= PA6T_MMCR0_SUPEN | PA6T_MMCR0_HYPEN;

	else

		sys->mmcr0 &= ~(PA6T_MMCR0_SUPEN | PA6T_MMCR0_HYPEN);



	if (sys->enable_user)

		sys->mmcr0 |= PA6T_MMCR0_PREN;

	else

		sys->mmcr0 &= ~PA6T_MMCR0_PREN;



	/*

	 * The performance counter event settings are given in the mmcr0 and

	 * mmcr1 values passed from the user in the op_system_config

	 * structure (sys variable).

	 */

	mmcr0_val = sys->mmcr0;

	mmcr1_val = sys->mmcr1;

	pr_debug("mmcr0_val inited to %016lx\n", sys->mmcr0);

	pr_debug("mmcr1_val inited to %016lx\n", sys->mmcr1);



	for (pmc = 0; pmc < cur_cpu_spec->num_pmcs; pmc++) {

		/* counters are 40 bit. Move to cputable at some point? */

		reset_value[pmc] = (0x1UL << 39) - ctr[pmc].count;

		pr_debug("reset_value for pmc%u inited to 0x%lx\n",

				 pmc, reset_value[pmc]);

	}

}



/* configure registers on this cpu */

static void pa6t_cpu_setup(struct op_counter_config *ctr)

{

	u64 mmcr0 = mmcr0_val;

	u64 mmcr1 = mmcr1_val;



	/* Default is all PMCs off */

	mmcr0 &= ~(0x3FUL);

	mtspr(SPRN_PA6T_MMCR0, mmcr0);



	/* program selected programmable events in */

	mtspr(SPRN_PA6T_MMCR1, mmcr1);



	pr_debug("setup on cpu %d, mmcr0 %016lx\n", smp_processor_id(),

		mfspr(SPRN_PA6T_MMCR0));

	pr_debug("setup on cpu %d, mmcr1 %016lx\n", smp_processor_id(),

		mfspr(SPRN_PA6T_MMCR1));

}



static void pa6t_start(struct op_counter_config *ctr)

{

	int i;



	/* Hold off event counting until rfid */

	u64 mmcr0 = mmcr0_val | PA6T_MMCR0_HANDDIS;



	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)

		if (ctr[i].enabled)

			ctr_write(i, reset_value[i]);

		else

			ctr_write(i, 0UL);



	mtspr(SPRN_PA6T_MMCR0, mmcr0);



	oprofile_running = 1;



	pr_debug("start on cpu %d, mmcr0 %lx\n", smp_processor_id(), mmcr0);

}



static void pa6t_stop(void)

{

	u64 mmcr0;



	/* freeze counters */

	mmcr0 = mfspr(SPRN_PA6T_MMCR0);

	mmcr0 |= PA6T_MMCR0_FCM0;

	mtspr(SPRN_PA6T_MMCR0, mmcr0);



	oprofile_running = 0;



	pr_debug("stop on cpu %d, mmcr0 %lx\n", smp_processor_id(), mmcr0);

}



/* handle the perfmon overflow vector */

static void pa6t_handle_interrupt(struct pt_regs *regs,

				  struct op_counter_config *ctr)

{

	unsigned long pc = mfspr(SPRN_PA6T_SIAR);

	int is_kernel = is_kernel_addr(pc);

	u64 val;

	int i;

	u64 mmcr0;



	/* disable perfmon counting until rfid */

	mmcr0 = mfspr(SPRN_PA6T_MMCR0);

	mtspr(SPRN_PA6T_MMCR0, mmcr0 | PA6T_MMCR0_HANDDIS);



	/* Record samples. We've got one global bit for whether a sample

	 * was taken, so add it for any counter that triggered overflow.

	 */

	for (i = 0; i < cur_cpu_spec->num_pmcs; i++) {

		val = ctr_read(i);

		if (val & (0x1UL << 39)) { /* Overflow bit set */

			if (oprofile_running && ctr[i].enabled) {

				if (mmcr0 & PA6T_MMCR0_SIARLOG)

					oprofile_add_ext_sample(pc, regs, i, is_kernel);

				ctr_write(i, reset_value[i]);

			} else {

				ctr_write(i, 0UL);

			}

		}

	}



	/* Restore mmcr0 to a good known value since the PMI changes it */

	mmcr0 = mmcr0_val | PA6T_MMCR0_HANDDIS;

	mtspr(SPRN_PA6T_MMCR0, mmcr0);

}



struct op_powerpc_model op_model_pa6t = {

	.reg_setup		= pa6t_reg_setup,

	.cpu_setup		= pa6t_cpu_setup,

	.start			= pa6t_start,

	.stop			= pa6t_stop,

	.handle_interrupt	= pa6t_handle_interrupt,

};