litmus-rt.git - The LITMUS^RT kernel.

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author	Bjoern B. Brandenburg <bbb@cs.unc.edu>	2010-09-22 15:52:03 -0400
committer	Bjoern B. Brandenburg <bbb@cs.unc.edu>	2010-10-19 09:40:42 -0400
commit	5c5456402d467969b217d7fdd6670f8c8600f5a8 (patch)
tree	9b119bda25aa31242ab8692b473e0fa6dbea6882 /arch/powerpc/include/asm/uaccess.h
parent	7caae3d71eae4f5307cae98131390e9d10627c01 (diff)

Litmus core: allow PRECISE_ENFORCEMENT2010.2

Allow all kinds of budget enforcement settings now that we have the supporting infrastructure.

Diffstat (limited to 'arch/powerpc/include/asm/uaccess.h')

0 files changed, 0 insertions, 0 deletions

/* * Hisilicon thermal sensor driver * * Copyright (c) 2014-2015 Hisilicon Limited. * Copyright (c) 2014-2015 Linaro Limited. * * Xinwei Kong <kong.kongxinwei@hisilicon.com> * Leo Yan <leo.yan@linaro.org> * * 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. * * This program is distributed "as is" WITHOUT ANY WARRANTY of any * kind, whether express or implied; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/cpufreq.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/of_device.h> #include "thermal_core.h" #define HI6220_TEMP0_LAG (0x0) #define HI6220_TEMP0_TH (0x4) #define HI6220_TEMP0_RST_TH (0x8) #define HI6220_TEMP0_CFG (0xC) #define HI6220_TEMP0_CFG_SS_MSK (0xF000) #define HI6220_TEMP0_CFG_HDAK_MSK (0x30) #define HI6220_TEMP0_EN (0x10) #define HI6220_TEMP0_INT_EN (0x14) #define HI6220_TEMP0_INT_CLR (0x18) #define HI6220_TEMP0_RST_MSK (0x1C) #define HI6220_TEMP0_VALUE (0x28) #define HI3660_OFFSET(chan) ((chan) * 0x40) #define HI3660_TEMP(chan) (HI3660_OFFSET(chan) + 0x1C) #define HI3660_TH(chan) (HI3660_OFFSET(chan) + 0x20) #define HI3660_LAG(chan) (HI3660_OFFSET(chan) + 0x28) #define HI3660_INT_EN(chan) (HI3660_OFFSET(chan) + 0x2C) #define HI3660_INT_CLR(chan) (HI3660_OFFSET(chan) + 0x30) #define HI6220_TEMP_BASE (-60000) #define HI6220_TEMP_RESET (100000) #define HI6220_TEMP_STEP (785) #define HI6220_TEMP_LAG (3500) #define HI3660_TEMP_BASE (-63780) #define HI3660_TEMP_STEP (205) #define HI3660_TEMP_LAG (4000) #define HI6220_CLUSTER0_SENSOR 2 #define HI6220_CLUSTER1_SENSOR 1 #define HI3660_LITTLE_SENSOR 0 #define HI3660_BIG_SENSOR 1 #define HI3660_G3D_SENSOR 2 #define HI3660_MODEM_SENSOR 3 struct hisi_thermal_data; struct hisi_thermal_sensor { struct hisi_thermal_data *data; struct thermal_zone_device *tzd; const char *irq_name; uint32_t id; uint32_t thres_temp; }; struct hisi_thermal_ops { int (*get_temp)(struct hisi_thermal_sensor *sensor); int (*enable_sensor)(struct hisi_thermal_sensor *sensor); int (*disable_sensor)(struct hisi_thermal_sensor *sensor); int (*irq_handler)(struct hisi_thermal_sensor *sensor); int (*probe)(struct hisi_thermal_data *data); }; struct hisi_thermal_data { const struct hisi_thermal_ops *ops; struct hisi_thermal_sensor *sensor; struct platform_device *pdev; struct clk *clk; void __iomem *regs; int nr_sensors; }; /* * The temperature computation on the tsensor is as follow: * Unit: millidegree Celsius * Step: 200/255 (0.7843) * Temperature base: -60°C * * The register is programmed in temperature steps, every step is 785 * millidegree and begins at -60 000 m°C * * The temperature from the steps: * * Temp = TempBase + (steps x 785) * * and the steps from the temperature: * * steps = (Temp - TempBase) / 785 * */ static inline int hi6220_thermal_step_to_temp(int step) { return HI6220_TEMP_BASE + (step * HI6220_TEMP_STEP); } static inline int hi6220_thermal_temp_to_step(int temp) { return DIV_ROUND_UP(temp - HI6220_TEMP_BASE, HI6220_TEMP_STEP); } /* * for Hi3660, * Step: 189/922 (0.205) * Temperature base: -63.780°C * * The register is programmed in temperature steps, every step is 205 * millidegree and begins at -63 780 m°C */ static inline int hi3660_thermal_step_to_temp(int step) { return HI3660_TEMP_BASE + step * HI3660_TEMP_STEP; } static inline int hi3660_thermal_temp_to_step(int temp) { return DIV_ROUND_UP(temp - HI3660_TEMP_BASE, HI3660_TEMP_STEP); } /* * The lag register contains 5 bits encoding the temperature in steps. * * Each time the temperature crosses the threshold boundary, an * interrupt is raised. It could be when the temperature is going * above the threshold or below. However, if the temperature is * fluctuating around this value due to the load, we can receive * several interrupts which may not desired. * * We can setup a temperature representing the delta between the * threshold and the current temperature when the temperature is * decreasing. * * For instance: the lag register is 5°C, the threshold is 65°C, when * the temperature reaches 65°C an interrupt is raised and when the * temperature decrease to 65°C - 5°C another interrupt is raised. * * A very short lag can lead to an interrupt storm, a long lag * increase the latency to react to the temperature changes. In our * case, that is not really a problem as we are polling the * temperature. * * [0:4] : lag register * * The temperature is coded in steps, cf. HI6220_TEMP_STEP. * * Min : 0x00 : 0.0 °C * Max : 0x1F : 24.3 °C * * The 'value' parameter is in milliCelsius. */ static inline void hi6220_thermal_set_lag(void __iomem *addr, int value) { writel(DIV_ROUND_UP(value, HI6220_TEMP_STEP) & 0x1F, addr + HI6220_TEMP0_LAG); } static inline void hi6220_thermal_alarm_clear(void __iomem *addr, int value) { writel(value, addr + HI6220_TEMP0_INT_CLR); } static inline void hi6220_thermal_alarm_enable(void __iomem *addr, int value) { writel(value, addr + HI6220_TEMP0_INT_EN); } static inline void hi6220_thermal_alarm_set(void __iomem *addr, int temp) { writel(hi6220_thermal_temp_to_step(temp) | 0x0FFFFFF00, addr + HI6220_TEMP0_TH); } static inline void hi6220_thermal_reset_set(void __iomem *addr, int temp) { writel(hi6220_thermal_temp_to_step(temp), addr + HI6220_TEMP0_RST_TH); } static inline void hi6220_thermal_reset_enable(void __iomem *addr, int value) { writel(value, addr + HI6220_TEMP0_RST_MSK); } static inline void hi6220_thermal_enable(void __iomem *addr, int value) { writel(value, addr + HI6220_TEMP0_EN); } static inline int hi6220_thermal_get_temperature(void __iomem *addr) { return hi6220_thermal_step_to_temp(readl(addr + HI6220_TEMP0_VALUE)); } /* * [0:6] lag register * * The temperature is coded in steps, cf. HI3660_TEMP_STEP. * * Min : 0x00 : 0.0 °C * Max : 0x7F : 26.0 °C * */ static inline void hi3660_thermal_set_lag(void __iomem *addr, int id, int value) { writel(DIV_ROUND_UP(value, HI3660_TEMP_STEP) & 0x7F, addr + HI3660_LAG(id)); } static inline void hi3660_thermal_alarm_clear(void __iomem *addr, int id, int value) { writel(value, addr + HI3660_INT_CLR(id)); } static inline void hi3660_thermal_alarm_enable(void __iomem *addr, int id, int value) { writel(value, addr + HI3660_INT_EN(id)); } static inline void hi3660_thermal_alarm_set(void __iomem *addr, int id, int value) { writel(value, addr + HI3660_TH(id)); } static inline int hi3660_thermal_get_temperature(void __iomem *addr, int id) { return hi3660_thermal_step_to_temp(readl(addr + HI3660_TEMP(id))); } /* * Temperature configuration register - Sensor selection * * Bits [19:12] * * 0x0: local sensor (default) * 0x1: remote sensor 1 (ACPU cluster 1) * 0x2: remote sensor 2 (ACPU cluster 0) * 0x3: remote sensor 3 (G3D) */ static inline void hi6220_thermal_sensor_select(void __iomem *addr, int sensor) { writel((readl(addr + HI6220_TEMP0_CFG) & ~HI6220_TEMP0_CFG_SS_MSK) | (sensor << 12), addr + HI6220_TEMP0_CFG); } /* * Temperature configuration register - Hdak conversion polling interval * * Bits [5:4] * * 0x0 : 0.768 ms * 0x1 : 6.144 ms * 0x2 : 49.152 ms * 0x3 : 393.216 ms */ static inline void hi6220_thermal_hdak_set(void __iomem *addr, int value) { writel((readl(addr + HI6220_TEMP0_CFG) & ~HI6220_TEMP0_CFG_HDAK_MSK) | (value << 4), addr + HI6220_TEMP0_CFG); } static int hi6220_thermal_irq_handler(struct hisi_thermal_sensor *sensor) { struct hisi_thermal_data *data = sensor->data; hi6220_thermal_alarm_clear(data->regs, 1); return 0; } static int hi3660_thermal_irq_handler(struct hisi_thermal_sensor *sensor) { struct hisi_thermal_data *data = sensor->data; hi3660_thermal_alarm_clear(data->regs, sensor->id, 1); return 0; } static int hi6220_thermal_get_temp(struct hisi_thermal_sensor *sensor) { struct hisi_thermal_data *data = sensor->data;


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