Giacomo Travaglini has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/35476 )
Change subject: arch-arm: Implement ArmPMU DTB generation
......................................................................
arch-arm: Implement ArmPMU DTB generation
This has been implemented by following Linux documentation:
Documentation/devicetree/bindings/arm/pmu.txt
Change-Id: I22583eed3792d5828f9c260e952ec5e8cf9e118b
Signed-off-by: Giacomo Travaglini <giacomo.travagl...@arm.com>
---
M src/arch/arm/ArmPMU.py
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/src/arch/arm/ArmPMU.py b/src/arch/arm/ArmPMU.py
index 047e908..1416e72 100644
--- a/src/arch/arm/ArmPMU.py
+++ b/src/arch/arm/ArmPMU.py
@@ -39,7 +39,8 @@
from m5.params import *
from m5.params import isNullPointer
from m5.proxy import *
-from m5.objects.Gic import ArmInterruptPin
+from m5.objects.Gic import ArmInterruptPin, ArmPPI
+from m5.util.fdthelper import *
class ProbeEvent(object):
def __init__(self, pmu, _eventId, obj, *listOfNames):
@@ -168,6 +169,20 @@
# 0x2F: L2D_TLB
# 0x30: L2I_TLB
+ def generateDeviceTree(self, state):
+ # For simplicity we just support PPIs for DTB autogen otherwise
+ # it would be difficult to construct a ordered list of SPIs
+ assert isinstance(self.interrupt, ArmPPI)
+
+ node = FdtNode("pmu")
+ node.appendCompatible("arm,armv8-pmuv3")
+
+ node.append(
+ FdtPropertyWords("interrupts",
+ self.interrupt.generateFdtProperty()))
+
+ yield node
+
cycleEventId = Param.Int(ARCH_EVENT_CORE_CYCLES, "Cycle event id")
platform = Param.Platform(Parent.any, "Platform this device is part
of.")
eventCounters = Param.Int(31, "Number of supported PMU counters")
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I22583eed3792d5828f9c260e952ec5e8cf9e118b
Gerrit-Change-Number: 35476
Gerrit-PatchSet: 1
Gerrit-Owner: Giacomo Travaglini <giacomo.travagl...@arm.com>
Gerrit-MessageType: newchange
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