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# Copyright (c) 2015-2016 ARM Limited
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#
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# 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
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# modified or unmodified, in source code or in binary form.
#
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# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
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# redistributions in binary form must reproduce the above copyright
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# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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from m5.SimObject import SimObject
from m5.params import *
from m5.proxy import *
from m5.objects.Device import PioDevice
from m5.objects.Platform import Platform
class PciHost(PioDevice):
type = "PciHost"
cxx_class = "gem5::PciHost"
cxx_header = "dev/pci/host.hh"
abstract = True
class GenericPciHost(PciHost):
type = "GenericPciHost"
cxx_class = "gem5::GenericPciHost"
cxx_header = "dev/pci/host.hh"
platform = Param.Platform(Parent.any, "Platform to use for interrupts")
conf_base = Param.Addr("Config space base address")
conf_size = Param.Addr("Config space base address")
conf_device_bits = Param.UInt8(
8, "Number of bits used to as an offset a devices address space"
)
pci_pio_base = Param.Addr(0, "Base address for PCI IO accesses")
pci_mem_base = Param.Addr(0, "Base address for PCI memory accesses")
pci_dma_base = Param.Addr(0, "Base address for DMA memory accesses")
def pciFdtAddr(
self,
bus=0,
device=0,
function=0,
register=0,
space=0,
aliased=0,
prefetchable=0,
relocatable=0,
addr=0,
):
busf = bus & 0xFF
devicef = device & 0x1F
functionf = function & 0x7
registerf = register & 0xFF
spacef = space & 0x3
aliasedf = aliased & 0x1
prefetchablef = prefetchable & 0x1
relocatablef = relocatable & 0x1
if (
busf != bus
or devicef != device
or functionf != function
or registerf != register
or spacef != space
or aliasedf != aliased
or prefetchablef != prefetchable
or relocatablef != relocatable
):
fatal("One of the fields for the PCI address is out of bounds")
address = (
registerf
| (functionf << 8)
| (devicef << 11)
| (busf << 16)
| (spacef << 24)
| (aliasedf << 29)
| (prefetchablef << 30)
| (relocatablef << 31)
)
low_addr = addr & 0xFFFFFFFF
high_addr = (addr >> 32) & 0xFFFFFFFF
return [address, high_addr, low_addr]