[deliverable/linux.git] / arch / ppc64 / oprofile / common.c

/*
 * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
 *
 * Based on alpha version.
 *
 * 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.
 */

#include <linux/oprofile.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/errno.h>
#include <asm/ptrace.h>
#include <asm/system.h>
#include <asm/pmc.h>
#include <asm/cputable.h>

#include "op_impl.h"

extern struct op_ppc64_model op_model_rs64;
extern struct op_ppc64_model op_model_power4;
static struct op_ppc64_model *model;

static struct op_counter_config ctr[OP_MAX_COUNTER];
static struct op_system_config sys;

static void op_handle_interrupt(struct pt_regs *regs)
{
	model->handle_interrupt(regs, ctr);
}

static int op_ppc64_setup(void)
{
	int err;

	/* Grab the hardware */
	err = reserve_pmc_hardware(op_handle_interrupt);
	if (err)
		return err;

	/* Pre-compute the values to stuff in the hardware registers.  */
	model->reg_setup(ctr, &sys, model->num_counters);

	/* Configure the registers on all cpus.  */
	on_each_cpu(model->cpu_setup, NULL, 0, 1);

	return 0;
}

static void op_ppc64_shutdown(void)
{
	release_pmc_hardware();
}

static void op_ppc64_cpu_start(void *dummy)
{
	model->start(ctr);
}

static int op_ppc64_start(void)
{
	on_each_cpu(op_ppc64_cpu_start, NULL, 0, 1);
	return 0;
}

static inline void op_ppc64_cpu_stop(void *dummy)
{
	model->stop();
}

static void op_ppc64_stop(void)
{
	on_each_cpu(op_ppc64_cpu_stop, NULL, 0, 1);
}

static int op_ppc64_create_files(struct super_block *sb, struct dentry *root)
{
	int i;

	/*
	 * There is one mmcr0, mmcr1 and mmcra for setting the events for
	 * all of the counters.
	 */
	oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0);
	oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1);
	oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra);

	for (i = 0; i < model->num_counters; ++i) {
		struct dentry *dir;
		char buf[3];

		snprintf(buf, sizeof buf, "%d", i);
		dir = oprofilefs_mkdir(sb, root, buf);

		oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
		oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
		oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
		/*
		 * We dont support per counter user/kernel selection, but
		 * we leave the entries because userspace expects them
		 */
		oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
		oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
		oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
	}

	oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel);
	oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user);
	oprofilefs_create_ulong(sb, root, "backtrace_spinlocks",
				&sys.backtrace_spinlocks);

	/* Default to tracing both kernel and user */
	sys.enable_kernel = 1;
	sys.enable_user = 1;

	/* Turn on backtracing through spinlocks by default */
	sys.backtrace_spinlocks = 1;

	return 0;
}

int __init oprofile_arch_init(struct oprofile_operations *ops)
{
	unsigned int pvr;

	pvr = mfspr(SPRN_PVR);

	switch (PVR_VER(pvr)) {
		case PV_630:
		case PV_630p:
			model = &op_model_rs64;
			break;

		case PV_NORTHSTAR:
		case PV_PULSAR:
		case PV_ICESTAR:
		case PV_SSTAR:
			model = &op_model_rs64;
			break;

		case PV_POWER4:
		case PV_POWER4p:
			model = &op_model_power4;
			break;

		case PV_970:
		case PV_970FX:
		case PV_970MP:
			model = &op_model_power4;
			break;

		case PV_POWER5:
		case PV_POWER5p:
			model = &op_model_power4;
			break;

		default:
			return -ENODEV;
	}

	ops->cpu_type = cur_cpu_spec->oprofile_cpu_type;
	model->num_counters = cur_cpu_spec->num_pmcs;
	ops->create_files = op_ppc64_create_files;
	ops->setup = op_ppc64_setup;
	ops->shutdown = op_ppc64_shutdown;
	ops->start = op_ppc64_start;
	ops->stop = op_ppc64_stop;

	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
	       ops->cpu_type);

	return 0;
}

void oprofile_arch_exit(void)
{
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
	3	*
	4	* Based on alpha version.
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
	12	#include <linux/oprofile.h>
	13	#include <linux/init.h>
	14	#include <linux/smp.h>
	15	#include <linux/errno.h>
	16	#include <asm/ptrace.h>
	17	#include <asm/system.h>
	18	#include <asm/pmc.h>
a6908cd0	19	#include <asm/cputable.h>
1da177e4 LT	20
	21	#include "op_impl.h"
	22
	23	extern struct op_ppc64_model op_model_rs64;
	24	extern struct op_ppc64_model op_model_power4;
	25	static struct op_ppc64_model *model;
	26
	27	static struct op_counter_config ctr[OP_MAX_COUNTER];
	28	static struct op_system_config sys;
	29
	30	static void op_handle_interrupt(struct pt_regs *regs)
	31	{
	32	model->handle_interrupt(regs, ctr);
	33	}
	34
	35	static int op_ppc64_setup(void)
	36	{
	37	int err;
	38
	39	/* Grab the hardware */
	40	err = reserve_pmc_hardware(op_handle_interrupt);
	41	if (err)
	42	return err;
	43
	44	/* Pre-compute the values to stuff in the hardware registers. */
	45	model->reg_setup(ctr, &sys, model->num_counters);
	46
	47	/* Configure the registers on all cpus. */
	48	on_each_cpu(model->cpu_setup, NULL, 0, 1);
	49
	50	return 0;
	51	}
	52
	53	static void op_ppc64_shutdown(void)
	54	{
	55	release_pmc_hardware();
	56	}
	57
	58	static void op_ppc64_cpu_start(void *dummy)
	59	{
	60	model->start(ctr);
	61	}
	62
	63	static int op_ppc64_start(void)
	64	{
	65	on_each_cpu(op_ppc64_cpu_start, NULL, 0, 1);
	66	return 0;
	67	}
	68
	69	static inline void op_ppc64_cpu_stop(void *dummy)
	70	{
	71	model->stop();
	72	}
	73
	74	static void op_ppc64_stop(void)
	75	{
	76	on_each_cpu(op_ppc64_cpu_stop, NULL, 0, 1);
	77	}
	78
	79	static int op_ppc64_create_files(struct super_block sb, struct dentry root)
	80	{
	81	int i;
	82
	83	/*
84	* There is one mmcr0, mmcr1 and mmcra for setting the events for
85	* all of the counters.
86	*/
87	oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0);
88	oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1);
89	oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra);
90
91	for (i = 0; i < model->num_counters; ++i) {
92	struct dentry *dir;
93	char buf[3];
94
95	snprintf(buf, sizeof buf, "%d", i);
96	dir = oprofilefs_mkdir(sb, root, buf);
97
98	oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
99	oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
100	oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
101	/*
102	* We dont support per counter user/kernel selection, but
103	* we leave the entries because userspace expects them
104	*/
105	oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
106	oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
107	oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
108	}
109
110	oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel);
111	oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user);
112	oprofilefs_create_ulong(sb, root, "backtrace_spinlocks",
113	&sys.backtrace_spinlocks);
114
115	/* Default to tracing both kernel and user */
116	sys.enable_kernel = 1;
117	sys.enable_user = 1;
118
119	/* Turn on backtracing through spinlocks by default */
120	sys.backtrace_spinlocks = 1;
121
122	return 0;
123	}
124
125	int __init oprofile_arch_init(struct oprofile_operations *ops)
126	{
127	unsigned int pvr;
128
129	pvr = mfspr(SPRN_PVR);
130
131	switch (PVR_VER(pvr)) {
132	case PV_630:
133	case PV_630p:
134	model = &op_model_rs64;
1da177e4 LT	135	break;
	136
	137	case PV_NORTHSTAR:
	138	case PV_PULSAR:
	139	case PV_ICESTAR:
	140	case PV_SSTAR:
	141	model = &op_model_rs64;
1da177e4 LT	142	break;
	143
	144	case PV_POWER4:
	145	case PV_POWER4p:
	146	model = &op_model_power4;
1da177e4 LT	147	break;
	148
	149	case PV_970:
	150	case PV_970FX:
04ed6519	151	case PV_970MP:
1da177e4	152	model = &op_model_power4;
1da177e4 LT	153	break;
	154
	155	case PV_POWER5:
	156	case PV_POWER5p:
	157	model = &op_model_power4;
1da177e4 LT	158	break;
	159
	160	default:
	161	return -ENODEV;
	162	}
	163
1a410d88	164	ops->cpu_type = cur_cpu_spec->oprofile_cpu_type;
a6908cd0	165	model->num_counters = cur_cpu_spec->num_pmcs;
1da177e4 LT	166	ops->create_files = op_ppc64_create_files;
	167	ops->setup = op_ppc64_setup;
	168	ops->shutdown = op_ppc64_shutdown;
	169	ops->start = op_ppc64_start;
	170	ops->stop = op_ppc64_stop;
	171
	172	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
	173	ops->cpu_type);
	174
	175	return 0;
	176	}
	177
	178	void oprofile_arch_exit(void)
	179	{
	180	}