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arm: Add support for programmable oscillators

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Add support for oscillators that can be programmed using the RealView
/ Versatile Express configuration interface. These oscillators are
typically used for things like the pixel clock in the display
controller.

The default configurations support the oscillators from a Versatile
Express motherboard (V2M-P1) with a CoreTile Express A15x2.
This commit is contained in:
Andreas Sandberg
2015-08-07 09:59:25 +01:00
parent cd098a7e84
commit 598edaae05
3 changed files with 253 additions and 86 deletions
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85
src/dev/arm/rv_ctrl.hh
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2010,2013 ARM Limited
* Copyright (c) 2010,2013,2015 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
@@ -43,6 +43,7 @@
#include "base/bitunion.hh"
#include "dev/io_device.hh"
#include "params/RealViewCtrl.hh"
#include "params/RealViewOsc.hh"
/** @file
* This implements the simple real view registers on a PBXA9
@@ -50,6 +51,37 @@
class RealViewCtrl : public BasicPioDevice
{
public:
enum DeviceFunc {
FUNC_OSC = 1,
FUNC_VOLT = 2,
FUNC_AMP = 3,
FUNC_TEMP = 4,
FUNC_RESET = 5,
FUNC_SCC = 6,
FUNC_MUXFPGA = 7,
FUNC_SHUTDOWN = 8,
FUNC_REBOOT = 9,
FUNC_DVIMODE = 11,
FUNC_POWER = 12,
FUNC_ENERGY = 13,
};
class Device
{
public:
Device(RealViewCtrl &parent, DeviceFunc func,
uint8_t site, uint8_t pos, uint8_t dcc, uint16_t dev)
{
parent.registerDevice(func, site, pos, dcc, dev, this);
}
virtual ~Device() {}
virtual uint32_t read() const = 0;
virtual void write(uint32_t value) = 0;
};
protected:
enum {
IdReg = 0x00,
@@ -96,6 +128,18 @@ class RealViewCtrl : public BasicPioDevice
Bitfield<16> locked;
EndBitUnion(SysLockReg)
BitUnion32(CfgCtrlReg)
Bitfield<11, 0> dev;
Bitfield<15, 12> pos;
Bitfield<17, 16> site;
Bitfield<25, 20> func;
Bitfield<29, 26> dcc;
Bitfield<30> wr;
Bitfield<31> start;
EndBitUnion(CfgCtrlReg)
static const uint32_t CFG_CTRL_ADDR_MASK = 0x3fffffffUL;
SysLockReg sysLock;
/** This register is used for smp booting.
@@ -127,17 +171,52 @@ class RealViewCtrl : public BasicPioDevice
* @param pkt The memory request.
* @param data Where to put the data.
*/
virtual Tick read(PacketPtr pkt);
Tick read(PacketPtr pkt) M5_ATTR_OVERRIDE;
/**
* All writes are simply ignored.
* @param pkt The memory request.
* @param data the data
*/
virtual Tick write(PacketPtr pkt);
Tick write(PacketPtr pkt) M5_ATTR_OVERRIDE;
void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
public:
void registerDevice(DeviceFunc func, uint8_t site, uint8_t pos,
uint8_t dcc, uint16_t dev,
Device *handler);
protected:
std::map<uint32_t, Device *> devices;
};
/**
* This is an implementation of a programmable oscillator on the that
* can be configured through the RealView/Versatile Express
* configuration interface.
*
* See ARM DUI 0447J (ARM Motherboard Express uATX -- V2M-P1).
*/
class RealViewOsc
: public ClockDomain, RealViewCtrl::Device
{
public:
RealViewOsc(RealViewOscParams *p);
virtual ~RealViewOsc() {};
void startup() M5_ATTR_OVERRIDE;
void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
public: // RealViewCtrl::Device interface
uint32_t read() const M5_ATTR_OVERRIDE;
void write(uint32_t freq) M5_ATTR_OVERRIDE;
protected:
void clockPeriod(Tick clock_period);
};