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38 #ifndef __DEV_ARM_VIO_MMIO_HH__
39 #define __DEV_ARM_VIO_MMIO_HH__
41 #include "dev/io_device.hh"
42 #include "dev/virtio/base.hh"
44 class ArmInterruptPin;
45 struct MmioVirtIOParams;
47 class MmioVirtIO : public BasicPioDevice
50 MmioVirtIO(const MmioVirtIOParams *params);
51 virtual ~MmioVirtIO();
53 protected: // BasicPioDevice
54 Tick read(PacketPtr pkt) override;
55 Tick write(PacketPtr pkt) override;
59 /** Offsets into VirtIO MMIO space. */
66 OFF_HOST_FEATURES = 0x10,
67 OFF_HOST_FEATURES_SELECT = 0x14,
68 OFF_GUEST_FEATURES = 0x20,
69 OFF_GUEST_FEATURES_SELECT = 0x24,
70 OFF_GUEST_PAGE_SIZE = 0x28,
71 OFF_QUEUE_SELECT = 0x30,
72 OFF_QUEUE_NUM_MAX = 0x34,
74 OFF_QUEUE_ALIGN = 0x3C,
76 OFF_QUEUE_NOTIFY = 0x50,
77 OFF_INTERRUPT_STATUS = 0x60,
78 OFF_INTERRUPT_ACK = 0x64,
86 INT_USED_RING = 1 << 0,
90 static const uint32_t MAGIC = 0x74726976;
91 static const uint32_t VERSION = 1;
92 static const uint32_t VENDOR_ID = 0x1AF4;
95 uint32_t read(Addr offset);
96 void write(Addr offset, uint32_t value);
99 void setInterrupts(uint32_t value);
101 uint32_t hostFeaturesSelect;
102 uint32_t guestFeaturesSelect;
104 uint32_t interruptStatus;
106 MakeCallback<MmioVirtIO, &MmioVirtIO::kick> callbackKick;
109 VirtIODeviceBase &vio;
110 ArmInterruptPin *const interrupt;
113 #endif // __DEV_ARM_VIO_MMIO_HH__