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# Authors: Nathan Binkert

from m5.SimObject import SimObject
from m5.params import *
from m5.proxy import *
from Device import BasicPioDevice, DmaDevice, PioDevice

class PciConfigAll(BasicPioDevice):
    type = 'PciConfigAll'
    cxx_header = "dev/pciconfigall.hh"
    platform = Param.Platform(Parent.any, "Platform this device is part of.")
    bus = Param.UInt8(0x00, "PCI bus to act as config space for")
    size = Param.MemorySize32('16MB', "Size of config space")

    pio_latency = '30ns'
    pio_addr = 0 # will be overridden by platform-based calculation


class PciDevice(DmaDevice):
    type = 'PciDevice'
    cxx_class = 'PciDevice'
    cxx_header = "dev/pcidev.hh"
    abstract = True
    platform = Param.Platform(Parent.any, "Platform this device is part of.")
    config = SlavePort("PCI configuration space port")
    pci_bus = Param.Int("PCI bus")
    pci_dev = Param.Int("PCI device number")
    pci_func = Param.Int("PCI function code")
    pio_latency = Param.Latency('30ns', "Programmed IO latency")
    config_latency = Param.Latency('20ns', "Config read or write latency")

    VendorID = Param.UInt16("Vendor ID")
    DeviceID = Param.UInt16("Device ID")
    Command = Param.UInt16(0, "Command")
    Status = Param.UInt16(0, "Status")
    Revision = Param.UInt8(0, "Device")
    ProgIF = Param.UInt8(0, "Programming Interface")
    SubClassCode = Param.UInt8(0, "Sub-Class Code")
    ClassCode = Param.UInt8(0, "Class Code")
    CacheLineSize = Param.UInt8(0, "System Cacheline Size")
    LatencyTimer = Param.UInt8(0, "PCI Latency Timer")
    HeaderType = Param.UInt8(0, "PCI Header Type")
    BIST = Param.UInt8(0, "Built In Self Test")

    BAR0 = Param.UInt32(0x00, "Base Address Register 0")
    BAR1 = Param.UInt32(0x00, "Base Address Register 1")
    BAR2 = Param.UInt32(0x00, "Base Address Register 2")
    BAR3 = Param.UInt32(0x00, "Base Address Register 3")
    BAR4 = Param.UInt32(0x00, "Base Address Register 4")
    BAR5 = Param.UInt32(0x00, "Base Address Register 5")
    BAR0Size = Param.MemorySize32('0B', "Base Address Register 0 Size")
    BAR1Size = Param.MemorySize32('0B', "Base Address Register 1 Size")
    BAR2Size = Param.MemorySize32('0B', "Base Address Register 2 Size")
    BAR3Size = Param.MemorySize32('0B', "Base Address Register 3 Size")
    BAR4Size = Param.MemorySize32('0B', "Base Address Register 4 Size")
    BAR5Size = Param.MemorySize32('0B', "Base Address Register 5 Size")
    BAR0LegacyIO = Param.Bool(False, "Whether BAR0 is hardwired legacy IO")
    BAR1LegacyIO = Param.Bool(False, "Whether BAR1 is hardwired legacy IO")
    BAR2LegacyIO = Param.Bool(False, "Whether BAR2 is hardwired legacy IO")
    BAR3LegacyIO = Param.Bool(False, "Whether BAR3 is hardwired legacy IO")
    BAR4LegacyIO = Param.Bool(False, "Whether BAR4 is hardwired legacy IO")
    BAR5LegacyIO = Param.Bool(False, "Whether BAR5 is hardwired legacy IO")

    CardbusCIS = Param.UInt32(0x00, "Cardbus Card Information Structure")
    SubsystemID = Param.UInt16(0x00, "Subsystem ID")
    SubsystemVendorID = Param.UInt16(0x00, "Subsystem Vendor ID")
    ExpansionROM = Param.UInt32(0x00, "Expansion ROM Base Address")
    CapabilityPtr = Param.UInt8(0x00, "Capability List Pointer offset")
    InterruptLine = Param.UInt8(0x00, "Interrupt Line")
    InterruptPin = Param.UInt8(0x00, "Interrupt Pin")
    MaximumLatency = Param.UInt8(0x00, "Maximum Latency")
    MinimumGrant = Param.UInt8(0x00, "Minimum Grant")

    # Capabilities List structures for PCIe devices
    # PMCAP - PCI Power Management Capability
    PMCAPBaseOffset = \
        Param.UInt8(0x00, "Base offset of PMCAP in PCI Config space")
    PMCAPNextCapability = \
        Param.UInt8(0x00, "Pointer to next capability block")
    PMCAPCapId = \
        Param.UInt8(0x00, "Specifies this is the Power Management capability")
    PMCAPCapabilities = \
        Param.UInt16(0x0000, "PCI Power Management Capabilities Register")
    PMCAPCtrlStatus = \
        Param.UInt16(0x0000, "PCI Power Management Control and Status")

    # MSICAP - Message Signaled Interrupt Capability
    MSICAPBaseOffset = \
        Param.UInt8(0x00, "Base offset of MSICAP in PCI Config space")
    MSICAPNextCapability = \
        Param.UInt8(0x00, "Pointer to next capability block")
    MSICAPCapId = Param.UInt8(0x00, "Specifies this is the MSI Capability")
    MSICAPMsgCtrl = Param.UInt16(0x0000, "MSI Message Control")
    MSICAPMsgAddr = Param.UInt32(0x00000000, "MSI Message Address")
    MSICAPMsgUpperAddr = Param.UInt32(0x00000000, "MSI Message Upper Address")
    MSICAPMsgData = Param.UInt16(0x0000, "MSI Message Data")
    MSICAPMaskBits = Param.UInt32(0x00000000, "MSI Interrupt Mask Bits")
    MSICAPPendingBits = Param.UInt32(0x00000000, "MSI Pending Bits")

    # MSIXCAP - MSI-X Capability
    MSIXCAPBaseOffset = \
        Param.UInt8(0x00, "Base offset of MSIXCAP in PCI Config space")
    MSIXCAPNextCapability = \
        Param.UInt8(0x00, "Pointer to next capability block")
    MSIXCAPCapId = Param.UInt8(0x00, "Specifices this the MSI-X Capability")
    MSIXMsgCtrl = Param.UInt16(0x0000, "MSI-X Message Control")
    MSIXTableOffset = \
        Param.UInt32(0x00000000, "MSI-X Table Offset and Table BIR")
    MSIXPbaOffset = Param.UInt32(0x00000000, "MSI-X PBA Offset and PBA BIR")

    # PXCAP - PCI Express Capability
    PXCAPBaseOffset = \
        Param.UInt8(0x00, "Base offset of PXCAP in PCI Config space")
    PXCAPNextCapability = Param.UInt8(0x00, "Pointer to next capability block")
    PXCAPCapId = Param.UInt8(0x00, "Specifies this is the PCIe Capability")
    PXCAPCapabilities = Param.UInt16(0x0000, "PCIe Capabilities")
    PXCAPDevCapabilities = Param.UInt32(0x00000000, "PCIe Device Capabilities")
    PXCAPDevCtrl = Param.UInt16(0x0000, "PCIe Device Control")
    PXCAPDevStatus = Param.UInt16(0x0000, "PCIe Device Status")
    PXCAPLinkCap = Param.UInt32(0x00000000, "PCIe Link Capabilities")
    PXCAPLinkCtrl = Param.UInt16(0x0000, "PCIe Link Control")
    PXCAPLinkStatus = Param.UInt16(0x0000, "PCIe Link Status")
    PXCAPDevCap2 = Param.UInt32(0x00000000, "PCIe Device Capabilities 2")
    PXCAPDevCtrl2 = Param.UInt32(0x00000000, "PCIe Device Control 2")
