7c9122b6f2
Enables automatic generation of Device Trees for RealView PCI host controllers. Note that some parts are more hard coded than you'd want, but this is due to the limited understanding the PCI host has of its configuration (i.e. it doesn't know all memory ranges). Fixing this, for now at least, went beyond the scope and intentions of the Device Tree generating code: use with care! Change-Id: I2041871e0eb4d04fb5191257c47dd38649d1c0cc Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5967 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
97 lines
4.1 KiB
Python
97 lines
4.1 KiB
Python
# Copyright (c) 2015-2016 ARM Limited
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# All rights reserved
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#
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# The license below extends only to copyright in the software and shall
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# not be construed as granting a license to any other intellectual
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# property including but not limited to intellectual property relating
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# to a hardware implementation of the functionality of the software
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# licensed hereunder. You may use the software subject to the license
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# terms below provided that you ensure that this notice is replicated
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# unmodified and in its entirety in all distributions of the software,
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# modified or unmodified, in source code or in binary form.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Andreas Sandberg
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# Glenn Bergmans
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from m5.SimObject import SimObject
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from m5.params import *
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from m5.proxy import *
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from Device import PioDevice
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from Platform import Platform
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class PciHost(PioDevice):
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type = 'PciHost'
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cxx_class = 'PciHost'
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cxx_header = "dev/pci/host.hh"
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abstract = True
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class GenericPciHost(PciHost):
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type = 'GenericPciHost'
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cxx_class = 'GenericPciHost'
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cxx_header = "dev/pci/host.hh"
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platform = Param.Platform(Parent.any, "Platform to use for interrupts")
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conf_base = Param.Addr("Config space base address")
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conf_size = Param.Addr("Config space base address")
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conf_device_bits = Param.UInt8(8, "Number of bits used to as an "
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"offset a devices address space")
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pci_pio_base = Param.Addr(0, "Base address for PCI IO accesses")
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pci_mem_base = Param.Addr(0, "Base address for PCI memory accesses")
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pci_dma_base = Param.Addr(0, "Base address for DMA memory accesses")
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def pciFdtAddr(self, bus=0, device=0, function=0, register=0, space=0,
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aliased=0, prefetchable=0, relocatable=0, addr=0):
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busf = bus & 0xff
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devicef = device & 0x1f
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functionf = function & 0x7
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registerf = register & 0xff
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spacef = space & 0x3
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aliasedf = aliased & 0x1
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prefetchablef = prefetchable & 0x1
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relocatablef = relocatable & 0x1
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if busf != bus or \
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devicef != device or \
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functionf != function or \
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registerf != register or \
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spacef != space or \
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aliasedf != aliased or \
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prefetchablef != prefetchable or \
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relocatablef != relocatable:
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fatal("One of the fields for the PCI address is out of bounds")
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address = registerf | (functionf << 8) | (devicef << 11) | \
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(busf << 16) | (spacef << 24) | (aliasedf << 29) | \
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(prefetchablef << 30) | (relocatablef << 31)
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low_addr = addr & 0xffffffff
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high_addr = (addr >> 32) & 0xffffffff
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return [address, high_addr, low_addr]
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