385 lines
7 KiB
C
385 lines
7 KiB
C
/*
|
|
* Freescale Embedded oprofile support, based on ppc64 oprofile support
|
|
* Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
|
|
*
|
|
* Copyright (c) 2004, 2010 Freescale Semiconductor, Inc
|
|
*
|
|
* Author: Andy Fleming
|
|
* Maintainer: Kumar Gala <galak@kernel.crashing.org>
|
|
*
|
|
* 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/smp.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/cputable.h>
|
|
#include <asm/reg_fsl_emb.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pmc.h>
|
|
#include <asm/oprofile_impl.h>
|
|
|
|
static unsigned long reset_value[OP_MAX_COUNTER];
|
|
|
|
static int num_counters;
|
|
static int oprofile_running;
|
|
|
|
static inline u32 get_pmlca(int ctr)
|
|
{
|
|
u32 pmlca;
|
|
|
|
switch (ctr) {
|
|
case 0:
|
|
pmlca = mfpmr(PMRN_PMLCA0);
|
|
break;
|
|
case 1:
|
|
pmlca = mfpmr(PMRN_PMLCA1);
|
|
break;
|
|
case 2:
|
|
pmlca = mfpmr(PMRN_PMLCA2);
|
|
break;
|
|
case 3:
|
|
pmlca = mfpmr(PMRN_PMLCA3);
|
|
break;
|
|
case 4:
|
|
pmlca = mfpmr(PMRN_PMLCA4);
|
|
break;
|
|
case 5:
|
|
pmlca = mfpmr(PMRN_PMLCA5);
|
|
break;
|
|
default:
|
|
panic("Bad ctr number\n");
|
|
}
|
|
|
|
return pmlca;
|
|
}
|
|
|
|
static inline void set_pmlca(int ctr, u32 pmlca)
|
|
{
|
|
switch (ctr) {
|
|
case 0:
|
|
mtpmr(PMRN_PMLCA0, pmlca);
|
|
break;
|
|
case 1:
|
|
mtpmr(PMRN_PMLCA1, pmlca);
|
|
break;
|
|
case 2:
|
|
mtpmr(PMRN_PMLCA2, pmlca);
|
|
break;
|
|
case 3:
|
|
mtpmr(PMRN_PMLCA3, pmlca);
|
|
break;
|
|
case 4:
|
|
mtpmr(PMRN_PMLCA4, pmlca);
|
|
break;
|
|
case 5:
|
|
mtpmr(PMRN_PMLCA5, pmlca);
|
|
break;
|
|
default:
|
|
panic("Bad ctr number\n");
|
|
}
|
|
}
|
|
|
|
static inline unsigned int ctr_read(unsigned int i)
|
|
{
|
|
switch(i) {
|
|
case 0:
|
|
return mfpmr(PMRN_PMC0);
|
|
case 1:
|
|
return mfpmr(PMRN_PMC1);
|
|
case 2:
|
|
return mfpmr(PMRN_PMC2);
|
|
case 3:
|
|
return mfpmr(PMRN_PMC3);
|
|
case 4:
|
|
return mfpmr(PMRN_PMC4);
|
|
case 5:
|
|
return mfpmr(PMRN_PMC5);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static inline void ctr_write(unsigned int i, unsigned int val)
|
|
{
|
|
switch(i) {
|
|
case 0:
|
|
mtpmr(PMRN_PMC0, val);
|
|
break;
|
|
case 1:
|
|
mtpmr(PMRN_PMC1, val);
|
|
break;
|
|
case 2:
|
|
mtpmr(PMRN_PMC2, val);
|
|
break;
|
|
case 3:
|
|
mtpmr(PMRN_PMC3, val);
|
|
break;
|
|
case 4:
|
|
mtpmr(PMRN_PMC4, val);
|
|
break;
|
|
case 5:
|
|
mtpmr(PMRN_PMC5, val);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static void init_pmc_stop(int ctr)
|
|
{
|
|
u32 pmlca = (PMLCA_FC | PMLCA_FCS | PMLCA_FCU |
|
|
PMLCA_FCM1 | PMLCA_FCM0);
|
|
u32 pmlcb = 0;
|
|
|
|
switch (ctr) {
|
|
case 0:
|
|
mtpmr(PMRN_PMLCA0, pmlca);
|
|
mtpmr(PMRN_PMLCB0, pmlcb);
|
|
break;
|
|
case 1:
|
|
mtpmr(PMRN_PMLCA1, pmlca);
|
|
mtpmr(PMRN_PMLCB1, pmlcb);
|
|
break;
|
|
case 2:
|
|
mtpmr(PMRN_PMLCA2, pmlca);
|
|
mtpmr(PMRN_PMLCB2, pmlcb);
|
|
break;
|
|
case 3:
|
|
mtpmr(PMRN_PMLCA3, pmlca);
|
|
mtpmr(PMRN_PMLCB3, pmlcb);
|
|
break;
|
|
case 4:
|
|
mtpmr(PMRN_PMLCA4, pmlca);
|
|
mtpmr(PMRN_PMLCB4, pmlcb);
|
|
break;
|
|
case 5:
|
|
mtpmr(PMRN_PMLCA5, pmlca);
|
|
mtpmr(PMRN_PMLCB5, pmlcb);
|
|
break;
|
|
default:
|
|
panic("Bad ctr number!\n");
|
|
}
|
|
}
|
|
|
|
static void set_pmc_event(int ctr, int event)
|
|
{
|
|
u32 pmlca;
|
|
|
|
pmlca = get_pmlca(ctr);
|
|
|
|
pmlca = (pmlca & ~PMLCA_EVENT_MASK) |
|
|
((event << PMLCA_EVENT_SHIFT) &
|
|
PMLCA_EVENT_MASK);
|
|
|
|
set_pmlca(ctr, pmlca);
|
|
}
|
|
|
|
static void set_pmc_user_kernel(int ctr, int user, int kernel)
|
|
{
|
|
u32 pmlca;
|
|
|
|
pmlca = get_pmlca(ctr);
|
|
|
|
if(user)
|
|
pmlca &= ~PMLCA_FCU;
|
|
else
|
|
pmlca |= PMLCA_FCU;
|
|
|
|
if(kernel)
|
|
pmlca &= ~PMLCA_FCS;
|
|
else
|
|
pmlca |= PMLCA_FCS;
|
|
|
|
set_pmlca(ctr, pmlca);
|
|
}
|
|
|
|
static void set_pmc_marked(int ctr, int mark0, int mark1)
|
|
{
|
|
u32 pmlca = get_pmlca(ctr);
|
|
|
|
if(mark0)
|
|
pmlca &= ~PMLCA_FCM0;
|
|
else
|
|
pmlca |= PMLCA_FCM0;
|
|
|
|
if(mark1)
|
|
pmlca &= ~PMLCA_FCM1;
|
|
else
|
|
pmlca |= PMLCA_FCM1;
|
|
|
|
set_pmlca(ctr, pmlca);
|
|
}
|
|
|
|
static void pmc_start_ctr(int ctr, int enable)
|
|
{
|
|
u32 pmlca = get_pmlca(ctr);
|
|
|
|
pmlca &= ~PMLCA_FC;
|
|
|
|
if (enable)
|
|
pmlca |= PMLCA_CE;
|
|
else
|
|
pmlca &= ~PMLCA_CE;
|
|
|
|
set_pmlca(ctr, pmlca);
|
|
}
|
|
|
|
static void pmc_start_ctrs(int enable)
|
|
{
|
|
u32 pmgc0 = mfpmr(PMRN_PMGC0);
|
|
|
|
pmgc0 &= ~PMGC0_FAC;
|
|
pmgc0 |= PMGC0_FCECE;
|
|
|
|
if (enable)
|
|
pmgc0 |= PMGC0_PMIE;
|
|
else
|
|
pmgc0 &= ~PMGC0_PMIE;
|
|
|
|
mtpmr(PMRN_PMGC0, pmgc0);
|
|
}
|
|
|
|
static void pmc_stop_ctrs(void)
|
|
{
|
|
u32 pmgc0 = mfpmr(PMRN_PMGC0);
|
|
|
|
pmgc0 |= PMGC0_FAC;
|
|
|
|
pmgc0 &= ~(PMGC0_PMIE | PMGC0_FCECE);
|
|
|
|
mtpmr(PMRN_PMGC0, pmgc0);
|
|
}
|
|
|
|
static int fsl_emb_cpu_setup(struct op_counter_config *ctr)
|
|
{
|
|
int i;
|
|
|
|
/* freeze all counters */
|
|
pmc_stop_ctrs();
|
|
|
|
for (i = 0;i < num_counters;i++) {
|
|
init_pmc_stop(i);
|
|
|
|
set_pmc_event(i, ctr[i].event);
|
|
|
|
set_pmc_user_kernel(i, ctr[i].user, ctr[i].kernel);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_emb_reg_setup(struct op_counter_config *ctr,
|
|
struct op_system_config *sys,
|
|
int num_ctrs)
|
|
{
|
|
int i;
|
|
|
|
num_counters = num_ctrs;
|
|
|
|
/* Our counters count up, and "count" refers to
|
|
* how much before the next interrupt, and we interrupt
|
|
* on overflow. So we calculate the starting value
|
|
* which will give us "count" until overflow.
|
|
* Then we set the events on the enabled counters */
|
|
for (i = 0; i < num_counters; ++i)
|
|
reset_value[i] = 0x80000000UL - ctr[i].count;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_emb_start(struct op_counter_config *ctr)
|
|
{
|
|
int i;
|
|
|
|
mtmsr(mfmsr() | MSR_PMM);
|
|
|
|
for (i = 0; i < num_counters; ++i) {
|
|
if (ctr[i].enabled) {
|
|
ctr_write(i, reset_value[i]);
|
|
/* Set each enabled counter to only
|
|
* count when the Mark bit is *not* set */
|
|
set_pmc_marked(i, 1, 0);
|
|
pmc_start_ctr(i, 1);
|
|
} else {
|
|
ctr_write(i, 0);
|
|
|
|
/* Set the ctr to be stopped */
|
|
pmc_start_ctr(i, 0);
|
|
}
|
|
}
|
|
|
|
/* Clear the freeze bit, and enable the interrupt.
|
|
* The counters won't actually start until the rfi clears
|
|
* the PMM bit */
|
|
pmc_start_ctrs(1);
|
|
|
|
oprofile_running = 1;
|
|
|
|
pr_debug("start on cpu %d, pmgc0 %x\n", smp_processor_id(),
|
|
mfpmr(PMRN_PMGC0));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fsl_emb_stop(void)
|
|
{
|
|
/* freeze counters */
|
|
pmc_stop_ctrs();
|
|
|
|
oprofile_running = 0;
|
|
|
|
pr_debug("stop on cpu %d, pmgc0 %x\n", smp_processor_id(),
|
|
mfpmr(PMRN_PMGC0));
|
|
|
|
mb();
|
|
}
|
|
|
|
|
|
static void fsl_emb_handle_interrupt(struct pt_regs *regs,
|
|
struct op_counter_config *ctr)
|
|
{
|
|
unsigned long pc;
|
|
int is_kernel;
|
|
int val;
|
|
int i;
|
|
|
|
pc = regs->nip;
|
|
is_kernel = is_kernel_addr(pc);
|
|
|
|
for (i = 0; i < num_counters; ++i) {
|
|
val = ctr_read(i);
|
|
if (val < 0) {
|
|
if (oprofile_running && ctr[i].enabled) {
|
|
oprofile_add_ext_sample(pc, regs, i, is_kernel);
|
|
ctr_write(i, reset_value[i]);
|
|
} else {
|
|
ctr_write(i, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* The freeze bit was set by the interrupt. */
|
|
/* Clear the freeze bit, and reenable the interrupt. The
|
|
* counters won't actually start until the rfi clears the PMM
|
|
* bit. The PMM bit should not be set until after the interrupt
|
|
* is cleared to avoid it getting lost in some hypervisor
|
|
* environments.
|
|
*/
|
|
mtmsr(mfmsr() | MSR_PMM);
|
|
pmc_start_ctrs(1);
|
|
}
|
|
|
|
struct op_powerpc_model op_model_fsl_emb = {
|
|
.reg_setup = fsl_emb_reg_setup,
|
|
.cpu_setup = fsl_emb_cpu_setup,
|
|
.start = fsl_emb_start,
|
|
.stop = fsl_emb_stop,
|
|
.handle_interrupt = fsl_emb_handle_interrupt,
|
|
};
|