mirror of https://github.com/acidanthera/audk.git
65 lines
2.0 KiB
ArmAsm
65 lines
2.0 KiB
ArmAsm
//
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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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#start of the code section
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.text
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.align 3
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#global symbols referenced by this module
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GCC_ASM_IMPORT(CEntryPoint)
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StartupAddr: .word CEntryPoint
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#make _ModuleEntryPoint as global
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GCC_ASM_EXPORT(_ModuleEntryPoint)
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ASM_PFX(_ModuleEntryPoint):
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# Identify CPU ID
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mrc p15, 0, r0, c0, c0, 5
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and r0, #0xf
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_SetupStack:
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# Setup Stack for the 4 CPU cores
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LoadConstantToReg (FixedPcdGet32(PcdCPUCoresNonSecStackBase) ,r1)
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LoadConstantToReg (FixedPcdGet32(PcdCPUCoresNonSecStackSize) ,r2)
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mov r3,r0 @ r3 = core_id
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mul r3,r3,r2 @ r3 = core_id * stack_size = offset from the stack base
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add r3,r3,r1 @ r3 = stack_base + offset
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add r3,r3,r2,LSR #1 @ r3 = stack_offset + (stack_size/2) <-- the top half is for the heap
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mov sp, r3
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# lr points to area in reset vector block containing PEI core address. lr needs to
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# be saved from the beginning as the _ModuleEntryPoint could call helper functions
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# that will overwrite 'lr'
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LoadConstantToReg (FixedPcdGet32(PcdNormalFdBaseAddress), 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 = core_id
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# r1 = pei_core_address
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blx r2
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.end
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