mirror of https://github.com/acidanthera/audk.git
98 lines
2.9 KiB
NASM
98 lines
2.9 KiB
NASM
//
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// Copyright (c) 2011, 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 <AsmMacroIoLib.h>
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#include <Base.h>
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#include <Library/PcdLib.h>
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#include <AutoGen.h>
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INCLUDE AsmMacroIoLib.inc
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IMPORT CEntryPoint
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IMPORT ArmReadMpidr
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EXPORT _ModuleEntryPoint
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PRESERVE8
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AREA PrePeiCoreEntryPoint, CODE, READONLY
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StartupAddr DCD CEntryPoint
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_ModuleEntryPoint
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// Identify CPU ID
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bl ArmReadMpidr
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// Get ID of this CPU in Multicore system
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LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCoreMask), r1)
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and r0, r0, r1
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// Calculate the top of the primary stack
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LoadConstantToReg (FixedPcdGet32(PcdCPUCoresStackBase), r1)
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LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), r2)
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add r2, r2, r1
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// Is it the Primary Core ?
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LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCore), r1)
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cmp r0, r1
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beq _SetupPrimaryCoreStack
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_SetupSecondaryCoreStack
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// r2 = Top of the primary stack = Base of the Secondary Stacks
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// Get the position of the cores (ClusterId * 4) + CoreId
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GetCorePositionInStack(r3, r0, r1)
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// The stack starts at the top of the stack region. Add '1' to the Core Position to get the top of the stack
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add r3, r3, #1
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LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), r1)
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// StackOffset = CorePos * StackSize
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mul r3, r3, r1
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// SP = StackBase + StackOffset
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add sp, r2, r3
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b _PrepareArguments
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_SetupPrimaryCoreStack
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// r2 = Top of the primary stack
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LoadConstantToReg (FixedPcdGet32(PcdPeiGlobalVariableSize), r3)
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// The reserved space for global variable must be 8-bytes aligned for pushing
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// 64-bit variable on the stack
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SetPrimaryStack (r2, r3, r1)
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// Set all the PEI global variables to 0
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mov r3, sp
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mov r1, #0x0
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_InitGlobals
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str r1, [r3], #4
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cmp r3, r2
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bne _InitGlobals
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_PrepareArguments
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// The PEI Core Entry Point has been computed by GenFV and stored in the second entry of the Reset Vector
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LoadConstantToReg (FixedPcdGet32(PcdFvBaseAddress), r2)
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add r2, r2, #4
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ldr r1, [r2]
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// move sec startup address into a data register
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// ensure we're jumping to FV version of the code (not boot remapped alias)
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ldr r2, StartupAddr
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// jump to PrePeiCore C code
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// r0 = mp_id
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// r1 = pei_core_address
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blx r2
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_NeverReturn
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b _NeverReturn
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END
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