2 // Copyright (c) 2011, ARM Limited. All rights reserved.
4 // This program and the accompanying materials
5 // are licensed and made available under the terms and conditions of the BSD License
6 // which accompanies this distribution. The full text of the license may be found at
7 // http://opensource.org/licenses/bsd-license.php
9 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
14 #include <AsmMacroIoLib.h>
16 #include <Library/PcdLib.h>
19 INCLUDE AsmMacroIoLib.inc
23 EXPORT _ModuleEntryPoint
26 AREA PrePeiCoreEntryPoint, CODE, READONLY
28 StartupAddr DCD CEntryPoint
33 // Get ID of this CPU in Multicore system
34 LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCoreMask), r1)
37 // Get the top of the primary stacks (and the base of the secondary stacks)
38 LoadConstantToReg (FixedPcdGet32(PcdCPUCoresStackBase), r1)
39 LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), r2)
42 // Is it the Primary Core ?
43 LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCore), r3)
45 beq _SetupPrimaryCoreStack
47 _SetupSecondaryCoreStack
48 // r1 contains the base of the secondary stacks
50 // Get the Core Position (ClusterId * 4) + CoreId
51 GetCorePositionFromMpId(r0, r5, r2)
52 // The stack starts at the top of the stack region. Add '1' to the Core Position to get the top of the stack
55 // StackOffset = CorePos * StackSize
56 LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), r2)
58 // SP = StackBase + StackOffset
62 // The PEI Core Entry Point has been computed by GenFV and stored in the second entry of the Reset Vector
63 LoadConstantToReg (FixedPcdGet32(PcdFvBaseAddress), r2)
67 // Move sec startup address into a data register
68 // Ensure we're jumping to FV version of the code (not boot remapped alias)
71 // Jump to PrePeiCore C code
73 // r1 = pei_core_address
77 _SetupPrimaryCoreStack
78 // r1 contains the top of the primary stack
79 LoadConstantToReg (FixedPcdGet32(PcdPeiGlobalVariableSize), r2)
81 // The reserved space for global variable must be 8-bytes aligned for pushing
82 // 64-bit variable on the stack
83 SetPrimaryStack (r1, r2, r3)