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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-11-17 13:58:07 +0000 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-11-23 16:05:28 +0000 |
| commit | 496cf19ac262dcc37a60652b535d725652947f3b (patch) | |
| tree | c9ec3ddd70ad6073f07d34a9bb154763de201b68 /ArmVirtPkg/Library/XenVirtMemInfoLib/AArch64 | |
| parent | 77ca9182818f28334f17f772adc7dfe24d8cf55f (diff) | |
| download | edk2-496cf19ac262dcc37a60652b535d725652947f3b.zip edk2-496cf19ac262dcc37a60652b535d725652947f3b.tar.gz edk2-496cf19ac262dcc37a60652b535d725652947f3b.tar.bz2 | |
ArmVirtPkg/ArmVirtXen: add ArmVirtMemInfoLib implementation
Clone the existing ArmPlatformGetVirtualMemoryMap () for this platform,
clean it up slightly (by using a static buffer rather than a heap
allocation, and removing the support for uncached DRAM mappings), and
turn it into a new ArmVirtMemInfoLib implementation.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Julien Grall <julien.grall@linaro.org>
Diffstat (limited to 'ArmVirtPkg/Library/XenVirtMemInfoLib/AArch64')
| -rw-r--r-- | ArmVirtPkg/Library/XenVirtMemInfoLib/AArch64/PhysAddrTop.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/ArmVirtPkg/Library/XenVirtMemInfoLib/AArch64/PhysAddrTop.S b/ArmVirtPkg/Library/XenVirtMemInfoLib/AArch64/PhysAddrTop.S new file mode 100644 index 0000000..a1f6a19 --- /dev/null +++ b/ArmVirtPkg/Library/XenVirtMemInfoLib/AArch64/PhysAddrTop.S @@ -0,0 +1,39 @@ +#
+# Copyright (c) 2011-2013, ARM Limited. All rights reserved.
+# Copyright (c) 2016-2017, 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 <AsmMacroIoLibV8.h>
+
+//EFI_PHYSICAL_ADDRESS
+//GetPhysAddrTop (
+// VOID
+// );
+ASM_FUNC(ArmGetPhysAddrTop)
+ mrs x0, id_aa64mmfr0_el1
+ adr x1, .LPARanges
+ and x0, x0, #7
+ ldrb w1, [x1, x0]
+ mov x0, #1
+ lsl x0, x0, x1
+ ret
+
+//
+// Bits 0..2 of the AA64MFR0_EL1 system register encode the size of the
+// physical address space support on this CPU:
+// 0 == 32 bits, 1 == 36 bits, etc etc
+// 6 and 7 are reserved
+//
+.LPARanges:
+ .byte 32, 36, 40, 42, 44, 48, -1, -1
+
+ASM_FUNCTION_REMOVE_IF_UNREFERENCED
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