diff options
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/x86/X86LocalApic.py | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/arch/x86/X86LocalApic.py b/src/arch/x86/X86LocalApic.py index 5d4910e98..c1b835ccb 100644 --- a/src/arch/x86/X86LocalApic.py +++ b/src/arch/x86/X86LocalApic.py @@ -43,6 +43,7 @@ from m5.params import * from m5.proxy import * from m5.objects.Device import BasicPioDevice +from m5.objects.ClockDomain import DerivedClockDomain class X86LocalApic(BasicPioDevice): type = 'X86LocalApic' @@ -52,3 +53,15 @@ class X86LocalApic(BasicPioDevice): int_slave = SlavePort("Port for receiving interrupt messages") int_latency = Param.Latency('1ns', \ "Latency for an interrupt to propagate through this device.") + + # pio_addr isn't used by the local APIC model since it's address is + # calculated dynamically using the initial ID of the CPU it's attached to, + # but it needs to be set to something to make the BasicPioDevice happy. + pio_addr = 0x2000000000000000 + + # The clock rate for the local APIC timer is supposed to be the "bus clock" + # which we assume is 1/16th the rate of the CPU clock. I don't think this + # is a hard rule, but seems to be true in practice. This can be overriden + # in configs that use it. + clk_domain = DerivedClockDomain( + clk_domain=Parent.clk_domain, clk_divider=16) |