2 # Copyright (c) 2011-2013, ARM Limited. All rights reserved.
3 # Copyright (c) 2016-2017, 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 <AsmMacroIoLibV8.h>
17 //EFI_PHYSICAL_ADDRESS
21 ASM_FUNC(ArmGetPhysAddrTop)
22 mrs x0, id_aa64mmfr0_el1
31 // Bits 0..2 of the AA64MFR0_EL1 system register encode the size of the
32 // physical address space support on this CPU:
33 // 0 == 32 bits, 1 == 36 bits, etc etc
34 // 6 and 7 are reserved
37 .byte 32, 36, 40, 42, 44, 48, -1, -1
39 ASM_FUNCTION_REMOVE_IF_UNREFERENCED