drivers/devfreq/exynos/exynos_ppmu.h

   1 /*
   2  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   3  *              http://www.samsung.com/
   4  *
   5  * EXYNOS PPMU header
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 #ifndef __DEVFREQ_EXYNOS_PPMU_H
  13 #define __DEVFREQ_EXYNOS_PPMU_H __FILE__
  14
  15 #include <linux/ktime.h>
  16
  17 /* For PPMU Control */
  18 #define PPMU_ENABLE             BIT(0)
  19 #define PPMU_DISABLE            0x0
  20 #define PPMU_CYCLE_RESET        BIT(1)
  21 #define PPMU_COUNTER_RESET      BIT(2)
  22
  23 #define PPMU_ENABLE_COUNT0      BIT(0)
  24 #define PPMU_ENABLE_COUNT1      BIT(1)
  25 #define PPMU_ENABLE_COUNT2      BIT(2)
  26 #define PPMU_ENABLE_COUNT3      BIT(3)
  27 #define PPMU_ENABLE_CYCLE       BIT(31)
  28
  29 #define PPMU_CNTENS             0x10
  30 #define PPMU_FLAG               0x50
  31 #define PPMU_CCNT_OVERFLOW      BIT(31)
  32 #define PPMU_CCNT               0x100
  33
  34 #define PPMU_PMCNT0             0x110
  35 #define PPMU_PMCNT_OFFSET       0x10
  36 #define PMCNT_OFFSET(x)         (PPMU_PMCNT0 + (PPMU_PMCNT_OFFSET * x))
  37
  38 #define PPMU_BEVT0SEL           0x1000
  39 #define PPMU_BEVTSEL_OFFSET     0x100
  40 #define PPMU_BEVTSEL(x)         (PPMU_BEVT0SEL + (ch * PPMU_BEVTSEL_OFFSET))
  41
  42 /* For Event Selection */
  43 #define RD_DATA_COUNT           0x5
  44 #define WR_DATA_COUNT           0x6
  45 #define RDWR_DATA_COUNT         0x7
  46
  47 enum ppmu_counter {
  48         PPMU_PMNCNT0,
  49         PPMU_PMCCNT1,
  50         PPMU_PMNCNT2,
  51         PPMU_PMNCNT3,
  52         PPMU_PMNCNT_MAX,
  53 };
  54
  55 struct bus_opp_table {
  56         unsigned int idx;
  57         unsigned long clk;
  58         unsigned long volt;
  59 };
  60
  61 struct exynos_ppmu {
  62         void __iomem *hw_base;
  63         unsigned int ccnt;
  64         unsigned int event[PPMU_PMNCNT_MAX];
  65         unsigned int count[PPMU_PMNCNT_MAX];
  66         unsigned long long ns;
  67         ktime_t reset_time;
  68         bool ccnt_overflow;
  69         bool count_overflow[PPMU_PMNCNT_MAX];
  70 };
  71
  72 struct busfreq_ppmu_data {
  73         struct exynos_ppmu *ppmu;
  74         int ppmu_end;
  75 };
  76
  77 void exynos_ppmu_reset(void __iomem *ppmu_base);
  78 void exynos_ppmu_setevent(void __iomem *ppmu_base, unsigned int ch,
  79                         unsigned int evt);
  80 void exynos_ppmu_start(void __iomem *ppmu_base);
  81 void exynos_ppmu_stop(void __iomem *ppmu_base);
  82 unsigned int exynos_ppmu_read(void __iomem *ppmu_base, unsigned int ch);
  83 void busfreq_mon_reset(struct busfreq_ppmu_data *ppmu_data);
  84 void exynos_read_ppmu(struct busfreq_ppmu_data *ppmu_data);
  85 int exynos_get_busier_ppmu(struct busfreq_ppmu_data *ppmu_data);
  86 #endif /* __DEVFREQ_EXYNOS_PPMU_H */