3043603401
Create a new ArmVirtMemInfoLib for ArmVirtQemuKernel by cloning the existing ArmPlatformGetVirtualMemoryMap () for this platform, (ArmQemuRelocatablePlatformLib *not* ArmVirtPlatformLib), and cleaning it up: - remove support for uncached DRAM mappings - replace EFI_D_xxx with DEBUG_xxx throughout - use a temp variable to hold the top of the physical address space - use AllocatePool () instead of AllocatePages (), given that we use 160 bytes only, and the memory is never freed. In a future patch, we will add this library to the ordinary ArmVirtQemu platform as well. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
40 lines
1.1 KiB
ArmAsm
40 lines
1.1 KiB
ArmAsm
#
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# Copyright (c) 2011-2013, ARM Limited. All rights reserved.
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# Copyright (c) 2016-2017, 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 <AsmMacroIoLibV8.h>
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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_FUNC(ArmGetPhysAddrTop)
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mrs x0, id_aa64mmfr0_el1
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adr x1, .LPARanges
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and x0, x0, #7
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ldrb w1, [x1, x0]
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mov x0, #1
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lsl x0, x0, x1
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ret
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//
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// Bits 0..2 of the AA64MFR0_EL1 system register encode the size of the
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// physical address space support on this CPU:
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// 0 == 32 bits, 1 == 36 bits, etc etc
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// 6 and 7 are reserved
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//
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.LPARanges:
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.byte 32, 36, 40, 42, 44, 48, -1, -1
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ASM_FUNCTION_REMOVE_IF_UNREFERENCED
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