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| author | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-09-22 23:01:13 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-09-22 23:01:13 +0000 |
| commit | 0787bc6184631f20f8bf3b4abd61630a4a9bc672 (patch) | |
| tree | 93b8a671290645e6d9af639463dd214ef676c4a8 /ArmPlatformPkg/PrePi/ModuleEntryPoint.S | |
| parent | 55a0d64b883bf8cc4db2a7890e29528ec57a2884 (diff) | |
| download | edk2-platforms-0787bc6184631f20f8bf3b4abd61630a4a9bc672.tar.xz | |
ArmPlatformPkg: Introduce Primary core macros
On MpCore system, the primary core can now be any core of the system.
To identify the primary core, you can use 'gArmTokenSpaceGuid.PcdArmPrimaryCoreMask'
and 'gArmTokenSpaceGuid.PcdArmPrimaryCore'.
These PCDs by default use the ClusterId and CoreId to identify the core. And the
primary core is defined as the ClusetrId=0 and CoreId=0.
The helper macros are: IS_PRIMARY_CORE(MpId), GET_CORE_ID(MpId), GET_CLUSTER_ID(MpId),
GET_CORE_POS(MpId), PRIMARY_CORE_ID.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12412 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPlatformPkg/PrePi/ModuleEntryPoint.S')
| -rwxr-xr-x | ArmPlatformPkg/PrePi/ModuleEntryPoint.S | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/ArmPlatformPkg/PrePi/ModuleEntryPoint.S b/ArmPlatformPkg/PrePi/ModuleEntryPoint.S index a8c779fba9..4d64aa7e86 100755 --- a/ArmPlatformPkg/PrePi/ModuleEntryPoint.S +++ b/ArmPlatformPkg/PrePi/ModuleEntryPoint.S @@ -21,15 +21,17 @@ # Global symbols referenced by this module
GCC_ASM_IMPORT(CEntryPoint)
+GCC_ASM_IMPORT(ArmReadMpidr)
GCC_ASM_EXPORT(_ModuleEntryPoint)
StartupAddr: .word CEntryPoint
ASM_PFX(_ModuleEntryPoint):
- // Identify CPU ID
- mrc p15, 0, r0, c0, c0, 5
- and r0, #0xf
+ // Get ID of this CPU in Multicore system
+ bl ASM_PFX(ArmReadMpidr)
+ LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCoreMask), r1)
+ and r0, r0, r1
_SetSVCMode:
// Enter SVC mode
@@ -94,7 +96,7 @@ _PrepareArguments: ldr r2, StartupAddr
// Jump to PrePiCore C code
- // r0 = core_id
+ // r0 = MpId
// r1 = UefiMemoryBase
blx r2
|