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/*
* Copyright (c) 2010-2015 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Ali Saidi
* Andreas Sandberg
*/
/** @file
* Implementiation of a PL011 UART
*/
#ifndef __DEV_ARM_PL011_H__
#define __DEV_ARM_PL011_H__
#include "dev/arm/amba_device.hh"
#include "dev/uart.hh"
class BaseGic;
struct Pl011Params;
class Pl011 : public Uart, public AmbaDevice
{
public:
Pl011(const Pl011Params *p);
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
public: // PioDevice
Tick read(PacketPtr pkt) override;
Tick write(PacketPtr pkt) override;
public: // Uart
void dataAvailable() override;
protected: // Interrupt handling
/** Function to generate interrupt */
void generateInterrupt();
/**
* Assign new interrupt values and update interrupt signals
*
* A new interrupt is scheduled signalled if the set of unmasked
* interrupts goes empty to non-empty. Conversely, if the set of
* unmasked interrupts goes from non-empty to empty, the interrupt
* signal is cleared.
*
* @param ints New <i>raw</i> interrupt status
* @param mask New interrupt mask
*/
void setInterrupts(uint16_t ints, uint16_t mask);
/**
* Convenience function to update the interrupt mask
*
* @see setInterrupts
* @param mask New interrupt mask
*/
void setInterruptMask(uint16_t mask) { setInterrupts(rawInt, mask); }
/**
* Convenience function to raise a new interrupt
*
* @see setInterrupts
* @param ints Set of interrupts to raise
*/
void raiseInterrupts(uint16_t ints) { setInterrupts(rawInt | ints, imsc); }
/**
* Convenience function to clear interrupts
*
* @see setInterrupts
* @param ints Set of interrupts to clear
*/
void clearInterrupts(uint16_t ints) { setInterrupts(rawInt & ~ints, imsc); }
/** Masked interrupt status register */
inline uint16_t maskInt() const { return rawInt & imsc; }
/** Wrapper to create an event out of the thing */
EventWrapper<Pl011, &Pl011::generateInterrupt> intEvent;
protected: // Registers
static const uint64_t AMBA_ID = ULL(0xb105f00d00341011);
static const int UART_DR = 0x000;
static const int UART_FR = 0x018;
static const int UART_FR_CTS = 0x001;
static const int UART_FR_RXFE = 0x010;
static const int UART_FR_TXFF = 0x020;
static const int UART_FR_RXFF = 0x040;
static const int UART_FR_TXFE = 0x080;
static const int UART_IBRD = 0x024;
static const int UART_FBRD = 0x028;
static const int UART_LCRH = 0x02C;
static const int UART_CR = 0x030;
static const int UART_IFLS = 0x034;
static const int UART_IMSC = 0x038;
static const int UART_RIS = 0x03C;
static const int UART_MIS = 0x040;
static const int UART_ICR = 0x044;
static const uint16_t UART_RIINTR = 1 << 0;
static const uint16_t UART_CTSINTR = 1 << 1;
static const uint16_t UART_CDCINTR = 1 << 2;
static const uint16_t UART_DSRINTR = 1 << 3;
static const uint16_t UART_RXINTR = 1 << 4;
static const uint16_t UART_TXINTR = 1 << 5;
static const uint16_t UART_RTINTR = 1 << 6;
static const uint16_t UART_FEINTR = 1 << 7;
static const uint16_t UART_PEINTR = 1 << 8;
static const uint16_t UART_BEINTR = 1 << 9;
static const uint16_t UART_OEINTR = 1 << 10;
uint16_t control;
/** fractional baud rate divisor. Not used for anything but reporting
* written value */
uint16_t fbrd;
/** integer baud rate divisor. Not used for anything but reporting
* written value */
uint16_t ibrd;
/** Line control register. Not used for anything but reporting
* written value */
uint16_t lcrh;
/** interrupt fifo level register. Not used for anything but reporting
* written value */
uint16_t ifls;
/** interrupt mask register. */
uint16_t imsc;
/** raw interrupt status register */
uint16_t rawInt;
protected: // Configuration
/** Gic to use for interrupting */
BaseGic * const gic;
/** Should the simulation end on an EOT */
const bool endOnEOT;
/** Interrupt number to generate */
const int intNum;
/** Delay before interrupting */
const Tick intDelay;
};
#endif //__DEV_ARM_PL011_H__
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