audk/ArmPlatformPkg/Library/ArmPlatformStackLib/AArch64/ArmPlatformStackLib.S

111 lines
2.6 KiB
ArmAsm

//
// Copyright (c) 2012-2014, 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 <AsmMacroIoLibV8.h>
//VOID
//ArmPlatformStackSet (
// IN UINTN StackBase,
// IN UINTN MpId,
// IN UINTN PrimaryStackSize,
// IN UINTN SecondaryStackSize
// );
ASM_FUNC(ArmPlatformStackSet)
// Save parameters
mov x6, x3
mov x5, x2
mov x4, x1
mov x3, x0
// Save the Link register
mov x7, x30
// Identify Stack
mov x0, x1
bl ASM_PFX(ArmPlatformIsPrimaryCore)
cmp x0, #1
// Restore parameters
mov x0, x3
mov x1, x4
mov x2, x5
mov x3, x6
// Restore the Link register
mov x30, x7
b.ne 0f
b ASM_PFX(ArmPlatformStackSetPrimary)
0:b ASM_PFX(ArmPlatformStackSetSecondary)
//VOID
//ArmPlatformStackSetPrimary (
// IN UINTN StackBase,
// IN UINTN MpId,
// IN UINTN PrimaryStackSize,
// IN UINTN SecondaryStackSize
// );
ASM_FUNC(ArmPlatformStackSetPrimary)
// Save the Link register
mov x4, x30
// Add stack of primary stack to StackBase
add x0, x0, x2
// Compute SecondaryCoresCount * SecondaryCoreStackSize
MOV32 (w1, FixedPcdGet32(PcdCoreCount) - 1)
mul x3, x3, x1
// Set Primary Stack ((StackBase + PrimaryStackSize) + (SecondaryCoresCount * SecondaryCoreStackSize))
add sp, x0, x3
br x4
//VOID
//ArmPlatformStackSetSecondary (
// IN UINTN StackBase,
// IN UINTN MpId,
// IN UINTN PrimaryStackSize,
// IN UINTN SecondaryStackSize
// );
ASM_FUNC(ArmPlatformStackSetSecondary)
// Save the Link register
mov x4, x30
mov sp, x0
// Get Core Position
mov x0, x1
bl ASM_PFX(ArmPlatformGetCorePosition)
mov x5, x0
// Get Primary Core Position
bl ASM_PFX(ArmPlatformGetPrimaryCoreMpId)
bl ASM_PFX(ArmPlatformGetCorePosition)
// Get Secondary Core Position. We should get consecutive secondary stack number from 1...(CoreCount-1)
cmp x5, x0
b.ls 1f
// Decrement the position if after the primary core
sub x5, x5, #1
1:
add x5, x5, #1
// Compute top of the secondary stack
mul x3, x3, x5
// Set stack
add sp, sp, x3
br x4