173 lines
3.9 KiB
C
173 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/**
|
|
* @file arch/sw_64/oprofile/common.c
|
|
*
|
|
* @remark Copyright 2002 OProfile authors
|
|
* @remark Read the file COPYING
|
|
*
|
|
* @author Richard Henderson <rth@twiddle.net>
|
|
*/
|
|
|
|
#include <linux/oprofile.h>
|
|
#include <linux/init.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/errno.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/special_insns.h>
|
|
|
|
#include "op_impl.h"
|
|
|
|
extern struct op_axp_model op_model_sw2 __attribute__((weak));
|
|
extern struct op_axp_model op_model_sw2 __attribute__((weak));
|
|
extern struct op_axp_model op_model_pca56 __attribute__((weak));
|
|
extern struct op_axp_model op_model_sw2 __attribute__((weak));
|
|
extern struct op_axp_model op_model_sw2f __attribute__((weak));
|
|
|
|
static struct op_axp_model *model;
|
|
|
|
extern void (*perf_irq)(unsigned long vector, struct pt_regs *regs);
|
|
static void (*save_perf_irq)(unsigned long vector, struct pt_regs *regs);
|
|
|
|
static struct op_counter_config ctr[20];
|
|
static struct op_system_config sys;
|
|
static struct op_register_config reg;
|
|
|
|
/* Called from do_entInt to handle the performance monitor interrupt. */
|
|
|
|
static void
|
|
op_handle_interrupt(unsigned long which, struct pt_regs *regs)
|
|
{
|
|
model->handle_interrupt(which, regs, ctr);
|
|
|
|
/*
|
|
* If the user has selected an interrupt frequency that is
|
|
* not exactly the width of the counter, write a new value
|
|
* into the counter such that it'll overflow after N more
|
|
* events.
|
|
*/
|
|
if ((reg.need_reset >> which) & 1)
|
|
model->reset_ctr(®, which);
|
|
}
|
|
|
|
static int
|
|
op_axp_setup(void)
|
|
{
|
|
unsigned long i, e;
|
|
|
|
/* Install our interrupt handler into the existing hook. */
|
|
save_perf_irq = perf_irq;
|
|
perf_irq = op_handle_interrupt;
|
|
|
|
/* Compute the mask of enabled counters. */
|
|
for (i = e = 0; i < model->num_counters; ++i)
|
|
if (ctr[i].enabled)
|
|
e |= 1 << i;
|
|
reg.enable = e;
|
|
|
|
/* Pre-compute the values to stuff in the hardware registers. */
|
|
model->reg_setup(®, ctr, &sys);
|
|
|
|
/* Configure the registers on all cpus. */
|
|
(void)smp_call_function(model->cpu_setup, ®, 1);
|
|
model->cpu_setup(®);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
op_axp_shutdown(void)
|
|
{
|
|
/* Remove our interrupt handler. We may be removing this module. */
|
|
perf_irq = save_perf_irq;
|
|
}
|
|
|
|
static void
|
|
op_axp_cpu_start(void *dummy)
|
|
{
|
|
wrperfmon(1, reg.enable);
|
|
}
|
|
|
|
static int
|
|
op_axp_start(void)
|
|
{
|
|
(void)smp_call_function(op_axp_cpu_start, NULL, 1);
|
|
op_axp_cpu_start(NULL);
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
op_axp_cpu_stop(void *dummy)
|
|
{
|
|
/* Disable performance monitoring for all counters. */
|
|
wrperfmon(0, -1);
|
|
}
|
|
|
|
static void
|
|
op_axp_stop(void)
|
|
{
|
|
(void)smp_call_function(op_axp_cpu_stop, NULL, 1);
|
|
op_axp_cpu_stop(NULL);
|
|
}
|
|
|
|
static int
|
|
op_axp_create_files(struct dentry *root)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < model->num_counters; ++i) {
|
|
struct dentry *dir;
|
|
char buf[4];
|
|
|
|
snprintf(buf, sizeof(buf), "%d", i);
|
|
dir = oprofilefs_mkdir(root, buf);
|
|
|
|
oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
|
|
oprofilefs_create_ulong(dir, "event", &ctr[i].event);
|
|
oprofilefs_create_ulong(dir, "count", &ctr[i].count);
|
|
/* Dummies. */
|
|
oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
|
|
oprofilefs_create_ulong(dir, "user", &ctr[i].user);
|
|
oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
|
|
}
|
|
|
|
if (model->can_set_proc_mode) {
|
|
oprofilefs_create_ulong(root, "enable_pal",
|
|
&sys.enable_pal);
|
|
oprofilefs_create_ulong(root, "enable_kernel",
|
|
&sys.enable_kernel);
|
|
oprofilefs_create_ulong(root, "enable_user",
|
|
&sys.enable_user);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int __init
|
|
oprofile_arch_init(struct oprofile_operations *ops)
|
|
{
|
|
struct op_axp_model *lmodel = NULL;
|
|
|
|
lmodel = &op_model_sw2f;
|
|
|
|
if (!lmodel)
|
|
return -ENODEV;
|
|
model = lmodel;
|
|
|
|
ops->create_files = op_axp_create_files;
|
|
ops->setup = op_axp_setup;
|
|
ops->shutdown = op_axp_shutdown;
|
|
ops->start = op_axp_start;
|
|
ops->stop = op_axp_stop;
|
|
ops->cpu_type = lmodel->cpu_type;
|
|
|
|
pr_info("oprofile: using %s performance monitoring.\n",
|
|
lmodel->cpu_type);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void
|
|
oprofile_arch_exit(void)
|
|
{
|
|
}
|