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| author | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-05-10 12:44:30 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-05-10 12:44:30 +0000 |
| commit | d05ca26cb891d8491641c378db4b0a0fcfc599d1 (patch) | |
| tree | f1d881cb4ed8196c1583904376a7586de84d3eb8 /ArmPlatformPkg/Library | |
| parent | bebda7ceec3d3024c76b3c2ed0c9b4e502a13d61 (diff) | |
| download | edk2-platforms-d05ca26cb891d8491641c378db4b0a0fcfc599d1.tar.xz | |
ArmPlatformPkg/ArmPlatformLib: Added ArmPlatformGetPrimaryCoreMpId()
ArmPlatformGetPrimaryCoreMpId returns the MPID of the primary core.
The primary core might not be known at build time (eg: the platform allows
the boot CPU to be changed through board config).
This function is used during the secondary core stack initialization to know
the position of the secondary core in the SoC.
A secondary core that is at the position N, with N greater than the primary
core position, will be at the position N-1 in the list of secondary stacks
(the primary core has its own separate bigger stack).
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
Acked-by: Ryan Harkin <ryan.harkin@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14345 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPlatformPkg/Library')
| -rw-r--r-- | ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S | 9 | ||||
| -rw-r--r-- | ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm | 11 |
2 files changed, 20 insertions, 0 deletions
diff --git a/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S b/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S index 47bf9c8946..e6f2a9e380 100644 --- a/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S +++ b/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.S @@ -18,6 +18,7 @@ .align 3
GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
+GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
@@ -33,6 +34,14 @@ ASM_PFX(ArmPlatformGetCorePosition): add r0, r1, r0, LSR #7
bx lr
+//UINTN
+//ArmPlatformGetPrimaryCoreMpId (
+// VOID
+// );
+ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
+ LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, r0)
+ ldr r0, [r0]
+ bx lr
//UINTN
//ArmPlatformIsPrimaryCore (
diff --git a/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm b/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm index 6d35182a27..84f1ee35bf 100644 --- a/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm +++ b/ArmPlatformPkg/Library/ArmPlatformLibNull/Arm/ArmPlatformHelper.asm @@ -17,6 +17,7 @@ INCLUDE AsmMacroIoLib.inc
EXPORT ArmPlatformGetCorePosition
+ EXPORT ArmPlatformGetPrimaryCoreMpId
EXPORT ArmPlatformIsPrimaryCore
IMPORT _gPcd_FixedAtBuild_PcdArmPrimaryCore
@@ -37,6 +38,16 @@ ArmPlatformGetCorePosition FUNCTION ENDFUNC
//UINTN
+//ArmPlatformGetPrimaryCoreMpId (
+// VOID
+// );
+ArmPlatformGetPrimaryCoreMpId FUNCTION
+ LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, r0)
+ ldr r0, [r0]
+ bx lr
+ ENDFUNC
+
+//UINTN
//ArmPlatformIsPrimaryCore (
// IN UINTN MpId
// );
|