mirror of https://gitee.com/openkylin/linux.git
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com/
|
|
*
|
|
* EXYNOS - PPMU support
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/io.h>
|
|
|
|
#include "exynos_ppmu.h"
|
|
|
|
void exynos_ppmu_reset(void __iomem *ppmu_base)
|
|
{
|
|
__raw_writel(PPMU_CYCLE_RESET | PPMU_COUNTER_RESET, ppmu_base);
|
|
__raw_writel(PPMU_ENABLE_CYCLE |
|
|
PPMU_ENABLE_COUNT0 |
|
|
PPMU_ENABLE_COUNT1 |
|
|
PPMU_ENABLE_COUNT2 |
|
|
PPMU_ENABLE_COUNT3,
|
|
ppmu_base + PPMU_CNTENS);
|
|
}
|
|
|
|
void exynos_ppmu_setevent(void __iomem *ppmu_base, unsigned int ch,
|
|
unsigned int evt)
|
|
{
|
|
__raw_writel(evt, ppmu_base + PPMU_BEVTSEL(ch));
|
|
}
|
|
|
|
void exynos_ppmu_start(void __iomem *ppmu_base)
|
|
{
|
|
__raw_writel(PPMU_ENABLE, ppmu_base);
|
|
}
|
|
|
|
void exynos_ppmu_stop(void __iomem *ppmu_base)
|
|
{
|
|
__raw_writel(PPMU_DISABLE, ppmu_base);
|
|
}
|
|
|
|
unsigned int exynos_ppmu_read(void __iomem *ppmu_base, unsigned int ch)
|
|
{
|
|
unsigned int total;
|
|
|
|
if (ch == PPMU_PMNCNT3)
|
|
total = ((__raw_readl(ppmu_base + PMCNT_OFFSET(ch)) << 8) |
|
|
__raw_readl(ppmu_base + PMCNT_OFFSET(ch + 1)));
|
|
else
|
|
total = __raw_readl(ppmu_base + PMCNT_OFFSET(ch));
|
|
|
|
return total;
|
|
}
|
|
|
|
void busfreq_mon_reset(struct busfreq_ppmu_data *ppmu_data)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ppmu_data->ppmu_end; i++) {
|
|
void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base;
|
|
|
|
/* Reset the performance and cycle counters */
|
|
exynos_ppmu_reset(ppmu_base);
|
|
|
|
/* Setup count registers to monitor read/write transactions */
|
|
ppmu_data->ppmu[i].event[PPMU_PMNCNT3] = RDWR_DATA_COUNT;
|
|
exynos_ppmu_setevent(ppmu_base, PPMU_PMNCNT3,
|
|
ppmu_data->ppmu[i].event[PPMU_PMNCNT3]);
|
|
|
|
exynos_ppmu_start(ppmu_base);
|
|
}
|
|
}
|
|
|
|
void exynos_read_ppmu(struct busfreq_ppmu_data *ppmu_data)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < ppmu_data->ppmu_end; i++) {
|
|
void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base;
|
|
|
|
exynos_ppmu_stop(ppmu_base);
|
|
|
|
/* Update local data from PPMU */
|
|
ppmu_data->ppmu[i].ccnt = __raw_readl(ppmu_base + PPMU_CCNT);
|
|
|
|
for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) {
|
|
if (ppmu_data->ppmu[i].event[j] == 0)
|
|
ppmu_data->ppmu[i].count[j] = 0;
|
|
else
|
|
ppmu_data->ppmu[i].count[j] =
|
|
exynos_ppmu_read(ppmu_base, j);
|
|
}
|
|
}
|
|
|
|
busfreq_mon_reset(ppmu_data);
|
|
}
|
|
|
|
int exynos_get_busier_ppmu(struct busfreq_ppmu_data *ppmu_data)
|
|
{
|
|
unsigned int count = 0;
|
|
int i, j, busy = 0;
|
|
|
|
for (i = 0; i < ppmu_data->ppmu_end; i++) {
|
|
for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) {
|
|
if (ppmu_data->ppmu[i].count[j] > count) {
|
|
count = ppmu_data->ppmu[i].count[j];
|
|
busy = i;
|
|
}
|
|
}
|
|
}
|
|
|
|
return busy;
|
|
}
|