| /* |
| * 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__ |