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#
# Copyright (c) 2011-2013, ARM Limited. All rights reserved.
# Copyright (c) 2014-2016, Linaro Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#
#include <AsmMacroIoLib.h>
#include <Library/ArmLib.h>
ASM_FUNC(ArmPlatformPeiBootAction)
//
// If we are booting from RAM using the Linux kernel boot protocol, r0 will
// point to the DTB image in memory. Otherwise, use the default value defined
// by the platform.
//
teq r0, #0
bne 0f
LDRL (r0, PcdGet64 (PcdDeviceTreeInitialBaseAddress))
0:mov r11, r14 // preserve LR
mov r10, r0 // preserve DTB pointer
mov r9, r1 // preserve base of image pointer
//
// The base of the runtime image has been preserved in r1. Check whether
// the expected magic number can be found in the header.
//
ldr r8, .LArm32LinuxMagic
ldr r7, [r1, #0x24]
cmp r7, r8
bne .Lout
//
//
// OK, so far so good. We have confirmed that we likely have a DTB and are
// booting via the ARM Linux boot protocol. Update the base-of-image PCD
// to the actual relocated value, and add the shift of PcdFdBaseAddress to
// PcdFvBaseAddress as well
//
ADRL (r8, PcdGet64 (PcdFdBaseAddress))
ADRL (r7, PcdGet64 (PcdFvBaseAddress))
ldr r6, [r8]
ldr r5, [r7]
sub r5, r5, r6
add r5, r5, r1
str r1, [r8]
str r5, [r7]
//
// Discover the memory size and offset from the DTB, and record in the
// respective PCDs. This will also return false if a corrupt DTB is
// encountered. Since we are calling a C function, use the window at the
// beginning of the FD image as a temp stack.
//
ADRL (r1, PcdGet64 (PcdSystemMemoryBase))
ADRL (r2, PcdGet64 (PcdSystemMemorySize))
mov sp, r5
bl FindMemnode
teq r0, #0
beq .Lout
//
// Copy the DTB to the slack space right after the 64 byte arm64/Linux style
// image header at the base of this image (defined in the FDF), and record the
// pointer in PcdDeviceTreeInitialBaseAddress.
//
ADRL (r8, PcdGet64 (PcdDeviceTreeInitialBaseAddress))
add r9, r9, #0x40
str r9, [r8]
mov r0, r9
mov r1, r10
bl CopyFdt
.Lout:
bx r11
.LArm32LinuxMagic:
.byte 0x18, 0x28, 0x6f, 0x01
//UINTN
//ArmPlatformGetPrimaryCoreMpId (
// VOID
// );
ASM_FUNC(ArmPlatformGetPrimaryCoreMpId)
MOV32 (r0, FixedPcdGet32 (PcdArmPrimaryCore))
bx lr
//UINTN
//ArmPlatformIsPrimaryCore (
// IN UINTN MpId
// );
ASM_FUNC(ArmPlatformIsPrimaryCore)
mov r0, #1
bx lr
//UINTN
//ArmPlatformGetCorePosition (
// IN UINTN MpId
// );
// With this function: CorePos = (ClusterId * 4) + CoreId
ASM_FUNC(ArmPlatformGetCorePosition)
and r1, r0, #ARM_CORE_MASK
and r0, r0, #ARM_CLUSTER_MASK
add r0, r1, r0, LSR #6
bx lr
//EFI_PHYSICAL_ADDRESS
//GetPhysAddrTop (
// VOID
// );
ASM_FUNC(ArmGetPhysAddrTop)
mov r0, #0x00000000
mov r1, #0x10000
bx lr
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