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//
// Copyright (c) 2012-2013, 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>
INCLUDE AsmMacroIoLib.inc
EXPORT ArmPlatformStackSet
EXPORT ArmPlatformStackSetPrimary
EXPORT ArmPlatformStackSetSecondary
IMPORT ArmPlatformIsPrimaryCore
IMPORT ArmPlatformGetCorePosition
IMPORT ArmPlatformGetPrimaryCoreMpId
IMPORT _gPcd_FixedAtBuild_PcdCoreCount
PRESERVE8
AREA ArmPlatformStackLib, CODE, READONLY
//VOID
//ArmPlatformStackSet (
// IN UINTN StackBase,
// IN UINTN MpId,
// IN UINTN PrimaryStackSize,
// IN UINTN SecondaryStackSize
// );
ArmPlatformStackSet FUNCTION
// Save parameters
mov r6, r3
mov r5, r2
mov r4, r1
mov r3, r0
// Save the Link register
mov r7, lr
// Identify Stack
mov r0, r1
bl ArmPlatformIsPrimaryCore
cmp r0, #1
// Restore parameters
mov r0, r3
mov r1, r4
mov r2, r5
mov r3, r6
// Restore the Link register
mov lr, r7
beq ArmPlatformStackSetPrimary
bne ArmPlatformStackSetSecondary
ENDFUNC
//VOID
//ArmPlatformStackSetPrimary (
// IN UINTN StackBase,
// IN UINTN MpId,
// IN UINTN PrimaryStackSize,
// IN UINTN SecondaryStackSize
// );
ArmPlatformStackSetPrimary FUNCTION
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
ENDFUNC
//VOID
//ArmPlatformStackSetSecondary (
// IN UINTN StackBase,
// IN UINTN MpId,
// IN UINTN PrimaryStackSize,
// IN UINTN SecondaryStackSize
// );
ArmPlatformStackSetSecondary FUNCTION
mov r4, lr
mov sp, r0
// Get Core Position
mov r0, r1
bl ArmPlatformGetCorePosition
mov r5, r0
// Get Primary Core Position
bl ArmPlatformGetPrimaryCoreMpId
bl 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
ENDFUNC
END
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