mirror of https://github.com/acidanthera/audk.git
ArmVirtPkg/ArmXenRelocatablePlatformLib: add ARM support
This is a port of the AARCH64 low level init routines to ARM. This mainly covers the platform boot code that extracts the system base and size from the DTB, copies it and updates the FD and FV base addresses according to the load time offset. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Laszlo Ersek <lersek@redhat.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19332 6f19259b-4bc3-4df7-8a09-765794883524
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Ard Biesheuvel
abiesheuvel
parent
809a639ee2
commit
4008259841
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#
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# Copyright (c) 2011-2013, ARM Limited. All rights reserved.
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# Copyright (c) 2014, Linaro 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/ArmLib.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 2
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GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
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GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
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GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
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GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
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GCC_ASM_EXPORT(ArmGetPhysAddrTop)
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GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
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GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
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GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdCoreCount)
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.LArm32LinuxMagic:
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.byte 0x18, 0x28, 0x6f, 0x01
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ASM_PFX(ArmPlatformPeiBootAction):
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mov r11, r14 // preserve LR
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mov r10, r0 // preserve DTB pointer
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mov r9, r1 // preserve base of image pointer
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//
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// If we are booting from RAM using the Linux kernel boot protocol, r0 will
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// point to the DTB image in memory. Otherwise, we are just coming out of
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// reset, and r0 will be 0.
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//
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teq r0, #0
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beq .Lout
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//
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// The base of the runtime image has been preserved in r1. Check whether
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// the expected magic number can be found in the header.
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//
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ldr r8, .LArm32LinuxMagic
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ldr r7, [r1, #0x24]
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cmp r7, r8
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bne .Lout
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//
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//
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// OK, so far so good. We have confirmed that we likely have a DTB and are
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// booting via the ARM Linux boot protocol. Update the base-of-image PCD
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// to the actual relocated value, and add the shift of PcdFdBaseAddress to
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// PcdFvBaseAddress as well
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//
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ldr r8, =PcdGet64 (PcdFdBaseAddress)
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ldr r7, =PcdGet64 (PcdFvBaseAddress)
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ldr r6, [r8]
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ldr r5, [r7]
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sub r5, r5, r6
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add r5, r5, r1
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str r1, [r8]
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str r5, [r7]
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//
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// Discover the memory size and offset from the DTB, and record in the
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// respective PCDs. This will also return false if a corrupt DTB is
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// encountered. Since we are calling a C function, use the window at the
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// beginning of the FD image as a temp stack.
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//
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ldr r1, =PcdGet64 (PcdSystemMemorySize)
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ldr r2, =PcdGet64 (PcdSystemMemoryBase)
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mov sp, r5
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bl FindMemnode
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teq r0, #0
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beq .Lout
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//
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// Copy the DTB to the slack space right after the 64 byte arm64/Linux style
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// image header at the base of this image (defined in the FDF), and record the
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// pointer in PcdDeviceTreeInitialBaseAddress.
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//
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ldr r8, =PcdGet64 (PcdDeviceTreeInitialBaseAddress)
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add r9, r9, #0x40
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str r9, [r8]
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mov r0, r9
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mov r1, r10
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bl CopyFdt
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.Lout:
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bx r11
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//UINTN
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//ArmPlatformGetPrimaryCoreMpId (
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// VOID
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// );
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ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
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LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r0)
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ldr r0, [r0]
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bx lr
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//UINTN
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//ArmPlatformIsPrimaryCore (
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// IN UINTN MpId
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// );
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ASM_PFX(ArmPlatformIsPrimaryCore):
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mov r0, #1
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bx lr
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//UINTN
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//ArmPlatformGetCorePosition (
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// IN UINTN MpId
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// );
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// With this function: CorePos = (ClusterId * 4) + CoreId
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ASM_PFX(ArmPlatformGetCorePosition):
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and r1, r0, #ARM_CORE_MASK
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and r0, r0, #ARM_CLUSTER_MASK
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add r0, r1, r0, LSR #6
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bx lr
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//EFI_PHYSICAL_ADDRESS
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//GetPhysAddrTop (
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// VOID
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// );
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ASM_PFX(ArmGetPhysAddrTop):
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mov r0, #0x00000000
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mov r1, #0x10000
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bx lr
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@ -42,6 +42,9 @@
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[Sources.AARCH64]
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AARCH64/RelocatableVirtHelper.S
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[Sources.ARM]
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ARM/RelocatableVirtHelper.S
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[FeaturePcd]
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gEmbeddedTokenSpaceGuid.PcdCacheEnable
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gArmPlatformTokenSpaceGuid.PcdSystemMemoryInitializeInSec
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