2 # Copyright (c) 2011-2013, ARM Limited. All rights reserved.
3 # Copyright (c) 2014, Linaro Limited. All rights reserved.
5 # This program and the accompanying materials
6 # are licensed and made available under the terms and conditions of the BSD License
7 # which accompanies this distribution. The full text of the license may be found at
8 # http://opensource.org/licenses/bsd-license.php
10 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 #include <AsmMacroIoLib.h>
17 #include <Library/ArmLib.h>
18 #include <Library/PcdLib.h>
24 GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
25 GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
26 GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
27 GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
28 GCC_ASM_EXPORT(ArmGetPhysAddrTop)
30 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
31 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
32 GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdCoreCount)
35 .byte 0x18, 0x28, 0x6f, 0x01
37 ASM_PFX(ArmPlatformPeiBootAction):
38 mov r11, r14 // preserve LR
39 mov r10, r0 // preserve DTB pointer
40 mov r9, r1 // preserve base of image pointer
43 // If we are booting from RAM using the Linux kernel boot protocol, r0 will
44 // point to the DTB image in memory. Otherwise, we are just coming out of
45 // reset, and r0 will be 0.
51 // The base of the runtime image has been preserved in r1. Check whether
52 // the expected magic number can be found in the header.
54 ldr r8, .LArm32LinuxMagic
61 // OK, so far so good. We have confirmed that we likely have a DTB and are
62 // booting via the ARM Linux boot protocol. Update the base-of-image PCD
63 // to the actual relocated value, and add the shift of PcdFdBaseAddress to
64 // PcdFvBaseAddress as well
66 ldr r8, =PcdGet64 (PcdFdBaseAddress)
67 ldr r7, =PcdGet64 (PcdFvBaseAddress)
76 // Discover the memory size and offset from the DTB, and record in the
77 // respective PCDs. This will also return false if a corrupt DTB is
78 // encountered. Since we are calling a C function, use the window at the
79 // beginning of the FD image as a temp stack.
81 ldr r1, =PcdGet64 (PcdSystemMemoryBase)
82 ldr r2, =PcdGet64 (PcdSystemMemorySize)
89 // Copy the DTB to the slack space right after the 64 byte arm64/Linux style
90 // image header at the base of this image (defined in the FDF), and record the
91 // pointer in PcdDeviceTreeInitialBaseAddress.
93 ldr r8, =PcdGet64 (PcdDeviceTreeInitialBaseAddress)
105 //ArmPlatformGetPrimaryCoreMpId (
108 ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
109 LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r0)
114 //ArmPlatformIsPrimaryCore (
117 ASM_PFX(ArmPlatformIsPrimaryCore):
122 //ArmPlatformGetCorePosition (
125 // With this function: CorePos = (ClusterId * 4) + CoreId
126 ASM_PFX(ArmPlatformGetCorePosition):
127 and r1, r0, #ARM_CORE_MASK
128 and r0, r0, #ARM_CLUSTER_MASK
129 add r0, r1, r0, LSR #6
132 //EFI_PHYSICAL_ADDRESS
136 ASM_PFX(ArmGetPhysAddrTop):