mirror of https://github.com/acidanthera/audk.git
125 lines
2.8 KiB
NASM
125 lines
2.8 KiB
NASM
//
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// Copyright (c) 2012-2013, ARM Limited. All rights reserved.
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//
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// This program and the accompanying materials
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// are licensed and made available under the terms and conditions of the BSD License
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// which accompanies this distribution. The full text of the license may be found at
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// http://opensource.org/licenses/bsd-license.php
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//
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// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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//
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//
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#include <AutoGen.h>
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INCLUDE AsmMacroIoLib.inc
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EXPORT ArmPlatformStackSet
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EXPORT ArmPlatformStackSetPrimary
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EXPORT ArmPlatformStackSetSecondary
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IMPORT ArmPlatformIsPrimaryCore
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IMPORT ArmPlatformGetCorePosition
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IMPORT ArmPlatformGetPrimaryCoreMpId
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IMPORT _gPcd_FixedAtBuild_PcdCoreCount
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PRESERVE8
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AREA ArmPlatformStackLib, CODE, READONLY
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//VOID
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//ArmPlatformStackSet (
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// IN UINTN StackBase,
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// IN UINTN MpId,
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// IN UINTN PrimaryStackSize,
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// IN UINTN SecondaryStackSize
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// );
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ArmPlatformStackSet FUNCTION
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// Save parameters
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mov r6, r3
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mov r5, r2
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mov r4, r1
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mov r3, r0
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// Save the Link register
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mov r7, lr
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// Identify Stack
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mov r0, r1
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bl ArmPlatformIsPrimaryCore
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cmp r0, #1
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// Restore parameters
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mov r0, r3
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mov r1, r4
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mov r2, r5
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mov r3, r6
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// Restore the Link register
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mov lr, r7
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beq ArmPlatformStackSetPrimary
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bne ArmPlatformStackSetSecondary
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ENDFUNC
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//VOID
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//ArmPlatformStackSetPrimary (
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// IN UINTN StackBase,
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// IN UINTN MpId,
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// IN UINTN PrimaryStackSize,
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// IN UINTN SecondaryStackSize
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// );
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ArmPlatformStackSetPrimary FUNCTION
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mov r4, lr
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// Add stack of primary stack to StackBase
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add r0, r0, r2
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// Compute SecondaryCoresCount * SecondaryCoreStackSize
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mov32 r1, FixedPcdGet32 (PcdCoreCount)
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sub r1, #1
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mul r3, r3, r1
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// Set Primary Stack ((StackBase + PrimaryStackSize) + (SecondaryCoresCount * SecondaryCoreStackSize))
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add sp, r0, r3
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bx r4
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ENDFUNC
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//VOID
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//ArmPlatformStackSetSecondary (
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// IN UINTN StackBase,
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// IN UINTN MpId,
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// IN UINTN PrimaryStackSize,
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// IN UINTN SecondaryStackSize
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// );
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ArmPlatformStackSetSecondary FUNCTION
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mov r4, lr
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mov sp, r0
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// Get Core Position
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mov r0, r1
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bl ArmPlatformGetCorePosition
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mov r5, r0
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// Get Primary Core Position
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bl ArmPlatformGetPrimaryCoreMpId
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bl ArmPlatformGetCorePosition
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// Get Secondary Core Position. We should get consecutive secondary stack number from 1...(CoreCount-1)
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cmp r5, r0
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subhi r5, r5, #1
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add r5, r5, #1
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// Compute top of the secondary stack
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mul r3, r3, r5
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// Set stack
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add sp, sp, r3
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bx r4
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ENDFUNC
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END
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