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/*
* Copyright (c) 2016-2018 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.
*
* 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: Andreas Sandberg
*/
#ifndef __DEV_ARM_VIO_MMIO_HH__
#define __DEV_ARM_VIO_MMIO_HH__
#include "dev/io_device.hh"
#include "dev/virtio/base.hh"
class ArmInterruptPin;
struct MmioVirtIOParams;
class MmioVirtIO : public BasicPioDevice
{
public:
MmioVirtIO(const MmioVirtIOParams *params);
virtual ~MmioVirtIO();
protected: // BasicPioDevice
Tick read(PacketPtr pkt) override;
Tick write(PacketPtr pkt) override;
protected:
/** @{ */
/** Offsets into VirtIO MMIO space. */
enum : Addr {
OFF_MAGIC = 0x00,
OFF_VERSION = 0x04,
OFF_DEVICE_ID = 0x08,
OFF_VENDOR_ID = 0x0C,
OFF_HOST_FEATURES = 0x10,
OFF_HOST_FEATURES_SELECT = 0x14,
OFF_GUEST_FEATURES = 0x20,
OFF_GUEST_FEATURES_SELECT = 0x24,
OFF_GUEST_PAGE_SIZE = 0x28,
OFF_QUEUE_SELECT = 0x30,
OFF_QUEUE_NUM_MAX = 0x34,
OFF_QUEUE_NUM = 0x38,
OFF_QUEUE_ALIGN = 0x3C,
OFF_QUEUE_PFN = 0x40,
OFF_QUEUE_NOTIFY = 0x50,
OFF_INTERRUPT_STATUS = 0x60,
OFF_INTERRUPT_ACK = 0x64,
OFF_STATUS = 0x70,
OFF_CONFIG = 0x100,
};
/** @} */
enum {
INT_USED_RING = 1 << 0,
INT_CONFIG = 1 << 1,
};
static const uint32_t MAGIC = 0x74726976;
static const uint32_t VERSION = 1;
static const uint32_t VENDOR_ID = 0x1AF4;
uint32_t read(Addr offset);
void write(Addr offset, uint32_t value);
void kick();
void setInterrupts(uint32_t value);
uint32_t hostFeaturesSelect;
uint32_t guestFeaturesSelect;
uint32_t pageSize;
uint32_t interruptStatus;
MakeCallback<MmioVirtIO, &MmioVirtIO::kick> callbackKick;
protected: // Params
VirtIODeviceBase &vio;
ArmInterruptPin *const interrupt;
};
#endif // __DEV_ARM_VIO_MMIO_HH__
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