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| author | Gabe Black <gabeblack@google.com> | 2014-11-21 17:22:02 -0800 |
|---|---|---|
| committer | Gabe Black <gabeblack@google.com> | 2014-11-21 17:22:02 -0800 |
| commit | 8bbfb1b39d06f33423f3a0acc661559fd0e3d038 (patch) | |
| tree | 36840b4ef77b3304efa5bbec0ae5fd841b12c20b /src/dev | |
| parent | 708e80d9bb0577662dd7181d4ae947c2cc9b8ac9 (diff) | |
| download | gem5-8bbfb1b39d06f33423f3a0acc661559fd0e3d038.tar.xz | |
x86: pc: Put a stub IO device at port 0xed which the kernel can use for delays.
There was already a stub device at 0x80, the port traditionally used for an IO
delay. 0x80 is also the port used for POST codes sent by firmware, and that
may have prompted adding this port as a second option.
Diffstat (limited to 'src/dev')
| -rw-r--r-- | src/dev/x86/Pc.py | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/dev/x86/Pc.py b/src/dev/x86/Pc.py index 1f1f3ca89..8740159c4 100644 --- a/src/dev/x86/Pc.py +++ b/src/dev/x86/Pc.py @@ -49,8 +49,9 @@ class Pc(Platform): south_bridge = SouthBridge() - # "Non-existant" port used for timing purposes by the linux kernel - i_dont_exist = IsaFake(pio_addr=x86IOAddress(0x80), pio_size=1) + # "Non-existant" ports used for timing purposes by the linux kernel + i_dont_exist1 = IsaFake(pio_addr=x86IOAddress(0x80), pio_size=1) + i_dont_exist2 = IsaFake(pio_addr=x86IOAddress(0xed), pio_size=1) # Ports behind the pci config and data regsiters. These don't do anything, # but the linux kernel fiddles with them anway. @@ -71,7 +72,8 @@ class Pc(Platform): def attachIO(self, bus, dma_ports = []): self.south_bridge.attachIO(bus, dma_ports) - self.i_dont_exist.pio = bus.master + self.i_dont_exist1.pio = bus.master + self.i_dont_exist2.pio = bus.master self.behind_pci.pio = bus.master self.com_1.pio = bus.master self.fake_com_2.pio = bus.master |