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| author | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2012-09-28 11:01:36 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2012-09-28 11:01:36 +0000 |
| commit | 17839a45b8748b88048774e2daefba4d0331678e (patch) | |
| tree | c5d49d910ca2c9127060c048907ea4a648e88134 /ArmPlatformPkg/Library/ArmPlatformStackLib/ArmPlatformStackLib.S | |
| parent | 7d49ced0cf64fbb3abf6b4d97dac4806bd1d9ee6 (diff) | |
| download | edk2-platforms-17839a45b8748b88048774e2daefba4d0331678e.tar.xz | |
ArmPlatformPkg/ArmPlatformStackLib: Introduced helper library to initialize stacks
The new functions are:
- ArmPlatformStackSet(IN UINTN StackBase, IN UINTN MpId, IN UINTN PrimaryStackSize, IN UINTN SecondaryStackSize);
- ArmPlatformStackSetPrimary(IN UINTN StackBase, IN UINTN MpId, IN UINTN PrimaryStackSize, IN UINTN SecondaryStackSize);
- ArmPlatformStackSetSecondary(IN UINTN StackBase, IN UINTN MpId, IN UINTN PrimaryStackSize, IN UINTN SecondaryStackSize);
The stack topology can be changed by implementing a new ArmPlatformStackLib
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13774 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPlatformPkg/Library/ArmPlatformStackLib/ArmPlatformStackLib.S')
| -rw-r--r-- | ArmPlatformPkg/Library/ArmPlatformStackLib/ArmPlatformStackLib.S | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/ArmPlatformPkg/Library/ArmPlatformStackLib/ArmPlatformStackLib.S b/ArmPlatformPkg/Library/ArmPlatformStackLib/ArmPlatformStackLib.S new file mode 100644 index 0000000000..94660c97fe --- /dev/null +++ b/ArmPlatformPkg/Library/ArmPlatformStackLib/ArmPlatformStackLib.S @@ -0,0 +1,106 @@ +//
+// Copyright (c) 2012, ARM Limited. All rights reserved.
+//
+// This program and the accompanying materials
+// are licensed and made available under the terms and conditions of the BSD License
+// which accompanies this distribution. The full text of the license may be found at
+// http://opensource.org/licenses/bsd-license.php
+//
+// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+//
+//
+
+#include <AsmMacroIoLib.h>
+#include <Base.h>
+#include <AutoGen.h>
+
+.text
+.align 3
+
+GCC_ASM_EXPORT(ArmPlatformStackSet)
+GCC_ASM_EXPORT(ArmPlatformStackSetPrimary)
+GCC_ASM_EXPORT(ArmPlatformStackSetSecondary)
+
+GCC_ASM_IMPORT(ArmPlatformGetCorePosition)
+
+GCC_ASM_IMPORT(gPcd_FixedAtBuild_PcdCoreCount)
+GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
+
+//VOID
+//ArmPlatformStackSet (
+// IN UINTN StackBase,
+// IN UINTN MpId,
+// IN UINTN PrimaryStackSize,
+// IN UINTN SecondaryStackSize
+// );
+ASM_PFX(ArmPlatformStackSet):
+ // Identify Stack
+ // Mask for ClusterId|CoreId
+ LoadConstantToReg (0xFFFF, r4)
+ and r1, r1, r4
+ // Is it the Primary Core ?
+ LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r4)
+ ldr r4, [r4]
+ cmp r1, r4
+ beq ASM_PFX(ArmPlatformStackSetPrimary)
+ bne ASM_PFX(ArmPlatformStackSetSecondary)
+
+//VOID
+//ArmPlatformStackSetPrimary (
+// IN UINTN StackBase,
+// IN UINTN MpId,
+// IN UINTN PrimaryStackSize,
+// IN UINTN SecondaryStackSize
+// );
+ASM_PFX(ArmPlatformStackSetPrimary):
+ mov r4, lr
+
+ // Add stack of primary stack to StackBase
+ add r0, r0, r2
+
+ // Compute SecondaryCoresCount * SecondaryCoreStackSize
+ LoadConstantToReg (_gPcd_FixedAtBuild_PcdCoreCount, r1)
+ ldr r1, [r1]
+ sub r1, #1
+ mul r3, r3, r1
+
+ // Set Primary Stack ((StackBase + PrimaryStackSize) + (SecondaryCoresCount * SecondaryCoreStackSize))
+ add sp, r0, r3
+
+ bx r4
+
+//VOID
+//ArmPlatformStackSetSecondary (
+// IN UINTN StackBase,
+// IN UINTN MpId,
+// IN UINTN PrimaryStackSize,
+// IN UINTN SecondaryStackSize
+// );
+ASM_PFX(ArmPlatformStackSetSecondary):
+ mov r4, lr
+ mov sp, r0
+
+ // Get Core Position
+ mov r0, r1
+ bl ASM_PFX(ArmPlatformGetCorePosition)
+ mov r5, r0
+
+ // Get Primary Core Position
+ LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r0)
+ ldr r0, [r0]
+ bl ASM_PFX(ArmPlatformGetCorePosition)
+
+ // Get Secondary Core Position. We should get consecutive secondary stack number from 1...(CoreCount-1)
+ cmp r5, r0
+ subhi r5, r5, #1
+ add r5, r5, #1
+
+ // Compute top of the secondary stack
+ mul r3, r3, r5
+
+ // Set stack
+ add sp, sp, r3
+
+ bx r4
+
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