2 // Copyright (c) 2011-2013, 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>
22 GCC_ASM_IMPORT(CEntryPoint)
23 GCC_ASM_IMPORT(ArmPlatformGetCorePosition)
24 GCC_ASM_IMPORT(ArmPlatformIsPrimaryCore)
25 GCC_ASM_IMPORT(ArmReadMpidr)
26 GCC_ASM_IMPORT(ArmPlatformPeiBootAction)
27 GCC_ASM_EXPORT(_ModuleEntryPoint)
29 StartupAddr: .word CEntryPoint
31 ASM_PFX(_ModuleEntryPoint):
32 // Do early platform specific actions
33 bl ASM_PFX(ArmPlatformPeiBootAction)
36 bl ASM_PFX(ArmReadMpidr)
37 // Keep a copy of the MpId register value
40 // Is it the Primary Core ?
41 bl ASM_PFX(ArmPlatformIsPrimaryCore)
43 // Get the top of the primary stacks (and the base of the secondary stacks)
44 LoadConstantToReg (FixedPcdGet32(PcdCPUCoresStackBase), r1)
45 LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), r2)
48 // r0 is equal to 1 if I am the primary core
50 beq _SetupPrimaryCoreStack
52 _SetupSecondaryCoreStack:
53 // r1 contains the base of the secondary stacks
55 // Get the Core Position
56 mov r6, r1 // Save base of the secondary stacks
58 bl ASM_PFX(ArmPlatformGetCorePosition)
59 // The stack starts at the top of the stack region. Add '1' to the Core Position to get the top of the stack
62 // StackOffset = CorePos * StackSize
63 LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), r2)
65 // SP = StackBase + StackOffset
69 // The PEI Core Entry Point has been computed by GenFV and stored in the second entry of the Reset Vector
70 LoadConstantToReg (FixedPcdGet32(PcdFvBaseAddress), r2)
74 // Move sec startup address into a data register
75 // Ensure we're jumping to FV version of the code (not boot remapped alias)
78 // Jump to PrePeiCore C code
80 // r1 = pei_core_address
84 _SetupPrimaryCoreStack:
85 // r1 contains the top of the primary stack
86 LoadConstantToReg (FixedPcdGet32(PcdPeiGlobalVariableSize), r2)
88 // The reserved space for global variable must be 8-bytes aligned for pushing
89 // 64-bit variable on the stack
90 SetPrimaryStack (r1, r2, r3)