91673dfdfe
This retypes some stack base PCD as 64-bit, and fixes up a number of references to 64-bit PCDs (including the retypes ones), to use the correct PcdGet64() accessors. Note that, in the case of FixedPcdGet64, this does not actually caused any problems, since that resolves to an immediate value. But the generic PcdGetxx accessors should be typed according to the size of the PCD. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Leo Duran <leo.duran@amd.com> [ard.biesheuvel: fixed up some instances in the 32-bit ARM code] Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
106 lines
3.3 KiB
ArmAsm
106 lines
3.3 KiB
ArmAsm
//
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// Copyright (c) 2011-2014, 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 <AsmMacroIoLibV8.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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.text
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.align 3
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GCC_ASM_IMPORT(CEntryPoint)
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GCC_ASM_IMPORT(ArmPlatformGetCorePosition)
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GCC_ASM_IMPORT(ArmPlatformIsPrimaryCore)
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GCC_ASM_IMPORT(ArmReadMpidr)
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GCC_ASM_IMPORT(ArmPlatformPeiBootAction)
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GCC_ASM_EXPORT(_ModuleEntryPoint)
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StartupAddr: .8byte CEntryPoint
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ASM_PFX(_ModuleEntryPoint):
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// Do early platform specific actions
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bl ASM_PFX(ArmPlatformPeiBootAction)
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// NOTE: We could be booting from EL3, EL2 or EL1. Need to correctly detect
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// and configure the system accordingly. EL2 is default if possible.
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// If we started in EL3 we need to switch and run at EL2.
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// If we are running at EL2 stay in EL2
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// If we are starting at EL1 stay in EL1.
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// If started at EL3 Sec is run and switches to EL2 before jumping to PEI.
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// If started at EL1 or EL2 Sec jumps directly to PEI without making any
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// changes.
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// Which EL are we running at? Every EL needs some level of setup...
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// We should not run this code in EL3
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EL1_OR_EL2(x0)
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1:bl ASM_PFX(SetupExceptionLevel1)
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b ASM_PFX(MainEntryPoint)
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2:bl ASM_PFX(SetupExceptionLevel2)
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b ASM_PFX(MainEntryPoint)
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ASM_PFX(MainEntryPoint):
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// Identify CPU ID
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bl ASM_PFX(ArmReadMpidr)
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// Keep a copy of the MpId register value
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mov x5, x0
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// Is it the Primary Core ?
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bl ASM_PFX(ArmPlatformIsPrimaryCore)
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// Get the top of the primary stacks (and the base of the secondary stacks)
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LoadConstantToReg (FixedPcdGet64(PcdCPUCoresStackBase), x1)
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LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), x2)
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add x1, x1, x2
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// x0 is equal to 1 if I am the primary core
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cmp x0, #1
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b.eq _SetupPrimaryCoreStack
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_SetupSecondaryCoreStack:
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// x1 contains the base of the secondary stacks
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// Get the Core Position
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mov x6, x1 // Save base of the secondary stacks
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mov x0, x5
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bl ASM_PFX(ArmPlatformGetCorePosition)
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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 x0, x0, #1
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// StackOffset = CorePos * StackSize
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LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), x2)
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mul x0, x0, x2
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// SP = StackBase + StackOffset
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add sp, x6, x0
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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 (FixedPcdGet64(PcdFvBaseAddress), x2)
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add x2, x2, #8
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ldr x1, [x2]
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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 x3, StartupAddr
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// Jump to PrePeiCore C code
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// x0 = mp_id
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// x1 = pei_core_address
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mov x0, x5
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blr x3
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_SetupPrimaryCoreStack:
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mov sp, x1
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b _PrepareArguments
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