65ecd95486
This patch enables Linux to read the temperature using hwmon infrastructure.
In order to use this in your gem5 you need to compile the kernel using the
following configs:
CONFIG_HWMON=y
CONFIG_SENSORS_VEXPRESS=y
And a proper dts file (containing an entry such as):
dcc {
compatible = "arm,vexpress,config-bus";
arm,vexpress,config-bridge = <&v2m_sysreg>;
temp@0 {
compatible = "arm,vexpress-temp";
arm,vexpress-sysreg,func = <4 0>;
label = "DCC";
};
};
252 lines
7.4 KiB
C++
252 lines
7.4 KiB
C++
/*
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* Copyright (c) 2010,2013,2015 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Ali Saidi
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*/
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#ifndef __DEV_ARM_RV_HH__
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#define __DEV_ARM_RV_HH__
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#include "base/bitunion.hh"
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#include "dev/io_device.hh"
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#include "params/RealViewCtrl.hh"
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#include "params/RealViewOsc.hh"
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#include "params/RealViewTemperatureSensor.hh"
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/** @file
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* This implements the simple real view registers on a PBXA9
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*/
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class RealViewCtrl : public BasicPioDevice
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{
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public:
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enum DeviceFunc {
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FUNC_OSC = 1,
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FUNC_VOLT = 2,
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FUNC_AMP = 3,
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FUNC_TEMP = 4,
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FUNC_RESET = 5,
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FUNC_SCC = 6,
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FUNC_MUXFPGA = 7,
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FUNC_SHUTDOWN = 8,
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FUNC_REBOOT = 9,
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FUNC_DVIMODE = 11,
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FUNC_POWER = 12,
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FUNC_ENERGY = 13,
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};
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class Device
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{
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public:
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Device(RealViewCtrl &parent, DeviceFunc func,
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uint8_t site, uint8_t pos, uint8_t dcc, uint16_t dev)
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{
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parent.registerDevice(func, site, pos, dcc, dev, this);
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}
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virtual ~Device() {}
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virtual uint32_t read() const = 0;
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virtual void write(uint32_t value) = 0;
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};
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protected:
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enum {
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IdReg = 0x00,
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SwReg = 0x04,
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Led = 0x08,
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Osc0 = 0x0C,
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Osc1 = 0x10,
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Osc2 = 0x14,
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Osc3 = 0x18,
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Osc4 = 0x1C,
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Lock = 0x20,
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Clock100 = 0x24,
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CfgData1 = 0x28,
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CfgData2 = 0x2C,
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Flags = 0x30,
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FlagsClr = 0x34,
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NvFlags = 0x38,
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NvFlagsClr = 0x3C,
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ResetCtl = 0x40,
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PciCtl = 0x44,
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MciCtl = 0x48,
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Flash = 0x4C,
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Clcd = 0x50,
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ClcdSer = 0x54,
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Bootcs = 0x58,
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Clock24 = 0x5C,
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Misc = 0x60,
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IoSel = 0x70,
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ProcId0 = 0x84,
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ProcId1 = 0x88,
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CfgData = 0xA0,
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CfgCtrl = 0xA4,
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CfgStat = 0xA8,
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TestOsc0 = 0xC0,
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TestOsc1 = 0xC4,
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TestOsc2 = 0xC8,
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TestOsc3 = 0xCC,
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TestOsc4 = 0xD0
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};
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// system lock value
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BitUnion32(SysLockReg)
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Bitfield<15,0> lockVal;
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Bitfield<16> locked;
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EndBitUnion(SysLockReg)
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BitUnion32(CfgCtrlReg)
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Bitfield<11, 0> dev;
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Bitfield<15, 12> pos;
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Bitfield<17, 16> site;
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Bitfield<25, 20> func;
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Bitfield<29, 26> dcc;
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Bitfield<30> wr;
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Bitfield<31> start;
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EndBitUnion(CfgCtrlReg)
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static const uint32_t CFG_CTRL_ADDR_MASK = 0x3fffffffUL;
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SysLockReg sysLock;
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/** This register is used for smp booting.
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* The primary cpu writes the secondary start address here before
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* sends it a soft interrupt. The secondary cpu reads this register and if
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* it's non-zero it jumps to the address
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*/
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uint32_t flags;
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/** This register contains the result from a system control reg access
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*/
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uint32_t scData;
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public:
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typedef RealViewCtrlParams Params;
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const Params *
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params() const
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{
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return dynamic_cast<const Params *>(_params);
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}
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/**
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* The constructor for RealView just registers itself with the MMU.
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* @param p params structure
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*/
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RealViewCtrl(Params *p);
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/**
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* Handle a read to the device
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* @param pkt The memory request.
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* @param data Where to put the data.
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*/
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Tick read(PacketPtr pkt) override;
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/**
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* All writes are simply ignored.
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* @param pkt The memory request.
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* @param data the data
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*/
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Tick write(PacketPtr pkt) override;
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void serialize(CheckpointOut &cp) const override;
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void unserialize(CheckpointIn &cp) override;
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public:
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void registerDevice(DeviceFunc func, uint8_t site, uint8_t pos,
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uint8_t dcc, uint16_t dev,
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Device *handler);
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protected:
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std::map<uint32_t, Device *> devices;
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};
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/**
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* This is an implementation of a programmable oscillator on the that
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* can be configured through the RealView/Versatile Express
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* configuration interface.
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*
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* See ARM DUI 0447J (ARM Motherboard Express uATX -- V2M-P1).
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*/
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class RealViewOsc
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: public ClockDomain, RealViewCtrl::Device
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{
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public:
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RealViewOsc(RealViewOscParams *p);
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virtual ~RealViewOsc() {};
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void startup() override;
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void serialize(CheckpointOut &cp) const override;
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void unserialize(CheckpointIn &cp) override;
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public: // RealViewCtrl::Device interface
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uint32_t read() const override;
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void write(uint32_t freq) override;
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protected:
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void clockPeriod(Tick clock_period);
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};
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/**
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* This device implements the temperature sensor used in the
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* RealView/Versatile Express platform.
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*
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* See ARM DUI 0447J (ARM Motherboard Express uATX -- V2M-P1).
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*/
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class RealViewTemperatureSensor
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: public SimObject, RealViewCtrl::Device
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{
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public:
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RealViewTemperatureSensor(RealViewTemperatureSensorParams *p)
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: SimObject(p),
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RealViewCtrl::Device(*p->parent, RealViewCtrl::FUNC_TEMP,
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p->site, p->position, p->dcc, p->device),
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system(p->system)
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{}
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virtual ~RealViewTemperatureSensor() {};
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public: // RealViewCtrl::Device interface
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uint32_t read() const override;
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void write(uint32_t temp) override {}
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protected:
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/** The system this RV device belongs to */
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System * system;
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};
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#endif // __DEV_ARM_RV_HH__
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