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 // Calculate the top of the primary stack
38 LoadConstantToReg (FixedPcdGet32(PcdCPUCoresStackBase), r1)
39 LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), r2)
42 // Is it the Primary Core ?
43 LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCore), r1)
45 beq _SetupPrimaryCoreStack
47 _SetupSecondaryCoreStack
48 // r2 = Top of the primary stack = Base of the Secondary Stacks
50 // Get the position of the cores (ClusterId * 4) + CoreId
51 GetCorePositionInStack(r3, r0, r1)
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 LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), r1)
56 // StackOffset = CorePos * StackSize
58 // SP = StackBase + StackOffset
63 _SetupPrimaryCoreStack
64 // r2 = Top of the primary stack
65 LoadConstantToReg (FixedPcdGet32(PcdPeiGlobalVariableSize), r3)
67 // The reserved space for global variable must be 8-bytes aligned for pushing
68 // 64-bit variable on the stack
69 SetPrimaryStack (r2, r3, r1)
71 // Set all the PEI global variables to 0
80 // The PEI Core Entry Point has been computed by GenFV and stored in the second entry of the Reset Vector
81 LoadConstantToReg (FixedPcdGet32(PcdFvBaseAddress), r2)
85 // move sec startup address into a data register
86 // ensure we're jumping to FV version of the code (not boot remapped alias)
89 // jump to PrePeiCore C code
91 // r1 = pei_core_address