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| author | Jiuyue Ma <majiuyue@ncic.ac.cn> | 2014-07-17 11:00:12 +0800 |
|---|---|---|
| committer | Jiuyue Ma <majiuyue@ncic.ac.cn> | 2014-07-17 11:00:12 +0800 |
| commit | 7d03bf4d6b8eb8445676575f72987bef3c81f480 (patch) | |
| tree | 85ce55888be73ed14c2a54636b85a466954b1e01 /configs/common | |
| parent | f94fd44991ce51dd7f24364cac1ba060bf24e02d (diff) | |
| download | gem5-7d03bf4d6b8eb8445676575f72987bef3c81f480.tar.xz | |
config, x86: swap bus_id of ISA/PCI in X86 IntelMPTable
This patch assign bus_id=0 to PCI bus and bus_id=1 to ISA bus for
X86 platform. Because PCI device get config space address using
Pc::calcPciConfigAddr() which requires "assert(bus==0)".
This fixes PCI interrupt routing and discovery on Linux.
Committed by: Nilay Vaish <nilay@cs.wisc.edu>
Diffstat (limited to 'configs/common')
| -rw-r--r-- | configs/common/FSConfig.py | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/configs/common/FSConfig.py b/configs/common/FSConfig.py index e93bd68f2..d3b788972 100644 --- a/configs/common/FSConfig.py +++ b/configs/common/FSConfig.py @@ -454,18 +454,21 @@ def makeX86System(mem_mode, numCPUs = 1, mdesc = None, self = None, address = 0xfec00000) self.pc.south_bridge.io_apic.apic_id = io_apic.id base_entries.append(io_apic) - isa_bus = X86IntelMPBus(bus_id = 0, bus_type='ISA') - base_entries.append(isa_bus) - pci_bus = X86IntelMPBus(bus_id = 1, bus_type='PCI') + # In gem5 Pc::calcPciConfigAddr(), it required "assert(bus==0)", + # but linux kernel cannot config PCI device if it was not connected to PCI bus, + # so we fix PCI bus id to 0, and ISA bus id to 1. + pci_bus = X86IntelMPBus(bus_id = 0, bus_type='PCI') base_entries.append(pci_bus) - connect_busses = X86IntelMPBusHierarchy(bus_id=0, - subtractive_decode=True, parent_bus=1) + isa_bus = X86IntelMPBus(bus_id = 1, bus_type='ISA') + base_entries.append(isa_bus) + connect_busses = X86IntelMPBusHierarchy(bus_id=1, + subtractive_decode=True, parent_bus=0) ext_entries.append(connect_busses) pci_dev4_inta = X86IntelMPIOIntAssignment( interrupt_type = 'INT', polarity = 'ConformPolarity', trigger = 'ConformTrigger', - source_bus_id = 1, + source_bus_id = 0, source_bus_irq = 0 + (4 << 2), dest_io_apic_id = io_apic.id, dest_io_apic_intin = 16) @@ -475,7 +478,7 @@ def makeX86System(mem_mode, numCPUs = 1, mdesc = None, self = None, interrupt_type = 'ExtInt', polarity = 'ConformPolarity', trigger = 'ConformTrigger', - source_bus_id = 0, + source_bus_id = 1, source_bus_irq = irq, dest_io_apic_id = io_apic.id, dest_io_apic_intin = 0) @@ -484,7 +487,7 @@ def makeX86System(mem_mode, numCPUs = 1, mdesc = None, self = None, interrupt_type = 'INT', polarity = 'ConformPolarity', trigger = 'ConformTrigger', - source_bus_id = 0, + source_bus_id = 1, source_bus_irq = irq, dest_io_apic_id = io_apic.id, dest_io_apic_intin = apicPin) |