src/dev/pci/PciHost.py

   1 # Copyright (c) 2015-2016 ARM Limited
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   4 # The license below extends only to copyright in the software and shall
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   8 # licensed hereunder.  You may use the software subject to the license
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  14 # modification, are permitted provided that the following conditions are
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  22 # this software without specific prior written permission.
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  24 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  35 #
  36 # Authors: Andreas Sandberg
  37 #          Glenn Bergmans
  38
  39 from m5.SimObject import SimObject
  40 from m5.params import *
  41 from m5.proxy import *
  42 from Device import PioDevice
  43 from Platform import Platform
  44
  45 class PciHost(PioDevice):
  46     type = 'PciHost'
  47     cxx_class = 'PciHost'
  48     cxx_header = "dev/pci/host.hh"
  49     abstract = True
  50
  51 class GenericPciHost(PciHost):
  52     type = 'GenericPciHost'
  53     cxx_class = 'GenericPciHost'
  54     cxx_header = "dev/pci/host.hh"
  55
  56     platform = Param.Platform(Parent.any, "Platform to use for interrupts")
  57
  58     conf_base = Param.Addr("Config space base address")
  59     conf_size = Param.Addr("Config space base address")
  60     conf_device_bits = Param.UInt8(8, "Number of bits used to as an "
  61                                       "offset a devices address space")
  62
  63     pci_pio_base = Param.Addr(0, "Base address for PCI IO accesses")
  64     pci_mem_base = Param.Addr(0, "Base address for PCI memory accesses")
  65     pci_dma_base = Param.Addr(0, "Base address for DMA memory accesses")
  66
  67     def pciFdtAddr(self, bus=0, device=0, function=0, register=0, space=0,
  68                    aliased=0, prefetchable=0, relocatable=0, addr=0):
  69
  70         busf = bus & 0xff
  71         devicef = device & 0x1f
  72         functionf = function & 0x7
  73         registerf = register & 0xff
  74         spacef = space & 0x3
  75         aliasedf = aliased & 0x1
  76         prefetchablef = prefetchable & 0x1
  77         relocatablef = relocatable & 0x1
  78
  79         if  busf != bus or \
  80             devicef != device or \
  81             functionf != function or \
  82             registerf != register or \
  83             spacef != space or \
  84             aliasedf != aliased or \
  85             prefetchablef != prefetchable or \
  86             relocatablef != relocatable:
  87             fatal("One of the fields for the PCI address is out of bounds")
  88
  89         address = registerf | (functionf << 8) | (devicef << 11) | \
  90                 (busf << 16) | (spacef << 24) | (aliasedf << 29) | \
  91                 (prefetchablef << 30) | (relocatablef << 31)
  92
  93         low_addr = addr & 0xffffffff
  94         high_addr = (addr >> 32) & 0xffffffff
  95
  96         return [address, high_addr, low_addr]