When ETE is enabled in the FVP model the firmware can check
the debug feature register ID_AA64DFR0_EL1.TraceVer field
to identify the presence of FEAT_ETE and add an ETE device
to the CPU node in the AML CPU hierarchy. This enables the
Operating System driver to probe and enable ETE support.
Note: To enable ETE support in the FVP REvC model
1. Build TF-A with the CTX_INCLUDE_AARCH32_REGS=0
build flag set, otherwise this results in an
exception when booting TF-A
2. Set the model parameters to enable TRBE as this
is required for ETE
-C cluster0.has_trbe=1 -C cluster1.has_trbe=1
3. Set the ETE plugin for the model
--plugin <PLUGIN_PATH>\libete-plugin.[so|dll]
Signed-off-by: Sami Mujawar <sami.muja...@arm.com>
---
Notes:
v2:
- No code change from v1 patch series. [SAMI]
Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManager.c
| 25 ++++++++++++++++++++
Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManager.h
| 2 ++
2 files changed, 27 insertions(+)
diff --git
a/Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManager.c
b/Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManager.c
index
221ccd44ca419edf030a0b37a6bbe64a1ab11273..b4855c6b6fdca0093744cad65cfabbb785a6c62c
100644
---
a/Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManager.c
+++
b/Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManager.c
@@ -366,6 +366,11 @@ EDKII_PLATFORM_REPOSITORY_INFO VExpressPlatRepositoryInfo
= {
FixedPcdGet32 (PcdPciBusMin),
FixedPcdGet32 (PcdPciBusMax)
},
+
+ // Embedded Trace device info
+ {
+ ArmEtTypeEte
+ }
};
/** A helper function for returning the Configuration Manager Objects.
@@ -478,6 +483,7 @@ InitializePlatformRepository (
UINT64 DbgFeatures;
UINTN Index;
UINT16 TrbeInterrupt;
+ CM_OBJECT_TOKEN EtToken;
PlatformRepo = This->PlatRepoInfo;
@@ -497,6 +503,7 @@ InitializePlatformRepository (
}
TrbeInterrupt = 0;
+ EtToken = CM_NULL_TOKEN;
DbgFeatures = ArmReadIdAA64Dfr0 ();
DEBUG ((
DEBUG_INFO,
@@ -510,8 +517,14 @@ InitializePlatformRepository (
TrbeInterrupt = 31;
}
+ // The ID_AA64DFR0_EL1.TraceVer field identifies the presence of FEAT_ETE.
+ if (((DbgFeatures >> 4) & 0xF) != 0) {
+ EtToken = (CM_OBJECT_TOKEN)&PlatformRepo->EtInfo;
+ }
+
for (Index = 0; Index < PLAT_CPU_COUNT; Index++) {
PlatformRepo->GicCInfo[Index].TrbeInterrupt = TrbeInterrupt;
+ PlatformRepo->GicCInfo[Index].EtToken = EtToken;
}
return EFI_SUCCESS;
@@ -983,6 +996,18 @@ GetArmNameSpaceObject (
);
break;
+ case EArmObjEtInfo:
+ if (Token == (CM_OBJECT_TOKEN)&PlatformRepo->EtInfo) {
+ Status = HandleCmObject (
+ CmObjectId,
+ &PlatformRepo->EtInfo,
+ sizeof (PlatformRepo->EtInfo),
+ 1,
+ CmObject
+ );
+ }
+ break;
+
default: {
Status = EFI_NOT_FOUND;
DEBUG ((
diff --git
a/Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManager.h
b/Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManager.h
index
1b52c2ebc7efb633c748f7316606e3dbe4e0b21c..be2b512911f897dc57328673ae4f4a2014ec20fb
100644
---
a/Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManager.h
+++
b/Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManager.h
@@ -171,6 +171,8 @@ typedef struct PlatformRepositoryInfo {
/// PCI configuration space information
CM_ARM_PCI_CONFIG_SPACE_INFO PciConfigInfo;
+ CM_ARM_ET_INFO EtInfo;
+
/// System ID
UINT32 SysId;
} EDKII_PLATFORM_REPOSITORY_INFO;
--
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'
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