1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/**
|
|
* @file op_model_athlon.h
|
|
* athlon / K7 model-specific MSR operations
|
|
*
|
|
* @remark Copyright 2002 OProfile authors
|
|
* @remark Read the file COPYING
|
|
*
|
|
* @author John Levon
|
|
* @author Philippe Elie
|
|
* @author Graydon Hoare
|
|
*/
|
|
|
|
#include <linux/oprofile.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/msr.h>
|
|
|
|
#include "op_x86_model.h"
|
|
#include "op_counter.h"
|
|
|
|
#define NUM_COUNTERS 4
|
|
#define NUM_CONTROLS 4
|
|
|
|
#define CTR_READ(l,h,msrs,c) do {rdmsr(msrs->counters[(c)].addr, (l), (h));} while (0)
|
|
#define CTR_WRITE(l,msrs,c) do {wrmsr(msrs->counters[(c)].addr, -(unsigned int)(l), -1);} while (0)
|
|
#define CTR_OVERFLOWED(n) (!((n) & (1U<<31)))
|
|
|
|
#define CTRL_READ(l,h,msrs,c) do {rdmsr(msrs->controls[(c)].addr, (l), (h));} while (0)
|
|
#define CTRL_WRITE(l,h,msrs,c) do {wrmsr(msrs->controls[(c)].addr, (l), (h));} while (0)
|
|
#define CTRL_SET_ACTIVE(n) (n |= (1<<22))
|
|
#define CTRL_SET_INACTIVE(n) (n &= ~(1<<22))
|
|
#define CTRL_CLEAR(x) (x &= (1<<21))
|
|
#define CTRL_SET_ENABLE(val) (val |= 1<<20)
|
|
#define CTRL_SET_USR(val,u) (val |= ((u & 1) << 16))
|
|
#define CTRL_SET_KERN(val,k) (val |= ((k & 1) << 17))
|
|
#define CTRL_SET_UM(val, m) (val |= (m << 8))
|
|
#define CTRL_SET_EVENT(val, e) (val |= e)
|
|
|
|
static unsigned long reset_value[NUM_COUNTERS];
|
|
|
|
static void athlon_fill_in_addresses(struct op_msrs * const msrs)
|
|
{
|
|
msrs->counters[0].addr = MSR_K7_PERFCTR0;
|
|
msrs->counters[1].addr = MSR_K7_PERFCTR1;
|
|
msrs->counters[2].addr = MSR_K7_PERFCTR2;
|
|
msrs->counters[3].addr = MSR_K7_PERFCTR3;
|
|
|
|
msrs->controls[0].addr = MSR_K7_EVNTSEL0;
|
|
msrs->controls[1].addr = MSR_K7_EVNTSEL1;
|
|
msrs->controls[2].addr = MSR_K7_EVNTSEL2;
|
|
msrs->controls[3].addr = MSR_K7_EVNTSEL3;
|
|
}
|
|
|
|
|
|
static void athlon_setup_ctrs(struct op_msrs const * const msrs)
|
|
{
|
|
unsigned int low, high;
|
|
int i;
|
|
|
|
/* clear all counters */
|
|
for (i = 0 ; i < NUM_CONTROLS; ++i) {
|
|
CTRL_READ(low, high, msrs, i);
|
|
CTRL_CLEAR(low);
|
|
CTRL_WRITE(low, high, msrs, i);
|
|
}
|
|
|
|
/* avoid a false detection of ctr overflows in NMI handler */
|
|
for (i = 0; i < NUM_COUNTERS; ++i) {
|
|
CTR_WRITE(1, msrs, i);
|
|
}
|
|
|
|
/* enable active counters */
|
|
for (i = 0; i < NUM_COUNTERS; ++i) {
|
|
if (counter_config[i].enabled) {
|
|
reset_value[i] = counter_config[i].count;
|
|
|
|
CTR_WRITE(counter_config[i].count, msrs, i);
|
|
|
|
CTRL_READ(low, high, msrs, i);
|
|
CTRL_CLEAR(low);
|
|
CTRL_SET_ENABLE(low);
|
|
CTRL_SET_USR(low, counter_config[i].user);
|
|
CTRL_SET_KERN(low, counter_config[i].kernel);
|
|
CTRL_SET_UM(low, counter_config[i].unit_mask);
|
|
CTRL_SET_EVENT(low, counter_config[i].event);
|
|
CTRL_WRITE(low, high, msrs, i);
|
|
} else {
|
|
reset_value[i] = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static int athlon_check_ctrs(struct pt_regs * const regs,
|
|
struct op_msrs const * const msrs)
|
|
{
|
|
unsigned int low, high;
|
|
int i;
|
|
|
|
for (i = 0 ; i < NUM_COUNTERS; ++i) {
|
|
CTR_READ(low, high, msrs, i);
|
|
if (CTR_OVERFLOWED(low)) {
|
|
oprofile_add_sample(regs, i);
|
|
CTR_WRITE(reset_value[i], msrs, i);
|
|
}
|
|
}
|
|
|
|
/* See op_model_ppro.c */
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void athlon_start(struct op_msrs const * const msrs)
|
|
{
|
|
unsigned int low, high;
|
|
int i;
|
|
for (i = 0 ; i < NUM_COUNTERS ; ++i) {
|
|
if (reset_value[i]) {
|
|
CTRL_READ(low, high, msrs, i);
|
|
CTRL_SET_ACTIVE(low);
|
|
CTRL_WRITE(low, high, msrs, i);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void athlon_stop(struct op_msrs const * const msrs)
|
|
{
|
|
unsigned int low,high;
|
|
int i;
|
|
|
|
/* Subtle: stop on all counters to avoid race with
|
|
* setting our pm callback */
|
|
for (i = 0 ; i < NUM_COUNTERS ; ++i) {
|
|
CTRL_READ(low, high, msrs, i);
|
|
CTRL_SET_INACTIVE(low);
|
|
CTRL_WRITE(low, high, msrs, i);
|
|
}
|
|
}
|
|
|
|
|
|
struct op_x86_model_spec const op_athlon_spec = {
|
|
.num_counters = NUM_COUNTERS,
|
|
.num_controls = NUM_CONTROLS,
|
|
.fill_in_addresses = &athlon_fill_in_addresses,
|
|
.setup_ctrs = &athlon_setup_ctrs,
|
|
.check_ctrs = &athlon_check_ctrs,
|
|
.start = &athlon_start,
|
|
.stop = &athlon_stop
|
|
};
|