amdgpu_device.hh

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/*
 * Copyright (c) 2021 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the copyright holder 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 HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */
 
#ifndef __DEV_AMDGPU_AMDGPU_DEVICE_HH__
#define __DEV_AMDGPU_AMDGPU_DEVICE_HH__
 
#include <map>
 
#include "base/bitunion.hh"
#include "dev/amdgpu/mmio_reader.hh"
#include "dev/io_device.hh"
#include "dev/pci/device.hh"
#include "params/AMDGPUDevice.hh"
 
namespace gem5
{
 
/* Names of BARs used by the device. */
constexpr int FRAMEBUFFER_BAR = 0;
constexpr int DOORBELL_BAR = 2;
constexpr int MMIO_BAR = 5;
 
/* By default the X86 kernel expects the vga ROM at 0xc0000. */
constexpr uint32_t VGA_ROM_DEFAULT = 0xc0000;
constexpr uint32_t ROM_SIZE = 0x20000;        // 128kB
 
class AMDGPUDevice : public PciDevice
{
  private:
    void dispatchAccess(PacketPtr pkt, bool read);
 
    void readFrame(PacketPtr pkt, Addr offset);
    void readDoorbell(PacketPtr pkt, Addr offset);
    void readMMIO(PacketPtr pkt, Addr offset);
 
    void writeFrame(PacketPtr pkt, Addr offset);
    void writeDoorbell(PacketPtr pkt, Addr offset);
    void writeMMIO(PacketPtr pkt, Addr offset);
 
    AddrRange romRange;
    bool isROM(Addr addr) const { return romRange.contains(addr); }
    void readROM(PacketPtr pkt);
 
    std::array<uint8_t, ROM_SIZE> rom;
 
    AMDMMIOReader mmioReader;
 
    std::unordered_map<uint32_t, uint64_t> regs;
 
    bool checkpoint_before_mmios;
    int init_interrupt_count;
 
  public:
    AMDGPUDevice(const AMDGPUDeviceParams &p);
 
    void intrPost();
 
    Tick writeConfig(PacketPtr pkt) override;
    Tick readConfig(PacketPtr pkt) override;
 
    Tick read(PacketPtr pkt) override;
    Tick write(PacketPtr pkt) override;
 
    AddrRangeList getAddrRanges() const override;
 
    void serialize(CheckpointOut &cp) const override;
    void unserialize(CheckpointIn &cp) override;
};
 
} // namespace gem5
 
#endif // __DEV_AMDGPU_AMDGPU_DEVICE_HH__