diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/ArmVirtPkg/Library/XenVirtMemInfoLib/XenVirtMemInfoLib.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/ArmVirtPkg/Library/XenVirtMemInfoLib/XenVirtMemInfoLib.c')
| -rw-r--r-- | roms/edk2/ArmVirtPkg/Library/XenVirtMemInfoLib/XenVirtMemInfoLib.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/roms/edk2/ArmVirtPkg/Library/XenVirtMemInfoLib/XenVirtMemInfoLib.c b/roms/edk2/ArmVirtPkg/Library/XenVirtMemInfoLib/XenVirtMemInfoLib.c new file mode 100644 index 000000000..aa483b6d9 --- /dev/null +++ b/roms/edk2/ArmVirtPkg/Library/XenVirtMemInfoLib/XenVirtMemInfoLib.c @@ -0,0 +1,57 @@ +/** @file
+
+ Copyright (c) 2014-2017, Linaro Limited. All rights reserved.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>
+#include <Library/ArmLib.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+
+STATIC ARM_MEMORY_REGION_DESCRIPTOR mVirtualMemoryTable[2];
+
+/**
+ Return the Virtual Memory Map of your platform
+
+ This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
+ on your platform.
+
+ @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
+ describing a Physical-to-Virtual Memory
+ mapping. This array must be ended by a
+ zero-filled entry. The allocated memory
+ will not be freed.
+
+**/
+VOID
+EFIAPI
+ArmVirtGetMemoryMap (
+ OUT ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
+ )
+{
+ EFI_PHYSICAL_ADDRESS TopOfAddressSpace;
+
+ ASSERT (VirtualMemoryMap != NULL);
+
+ TopOfAddressSpace = LShiftU64 (1ULL, ArmGetPhysicalAddressBits ());
+
+ //
+ // Map the entire physical memory space as cached. The only device
+ // we care about is the GIC, which will be stage 2 mapped as a device
+ // by the hypervisor, overriding the cached mapping we install here.
+ //
+ mVirtualMemoryTable[0].PhysicalBase = 0x0;
+ mVirtualMemoryTable[0].VirtualBase = 0x0;
+ mVirtualMemoryTable[0].Length = TopOfAddressSpace;
+ mVirtualMemoryTable[0].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
+
+ mVirtualMemoryTable[1].PhysicalBase = 0x0;
+ mVirtualMemoryTable[1].VirtualBase = 0x0;
+ mVirtualMemoryTable[1].Length = 0x0;
+ mVirtualMemoryTable[1].Attributes = 0x0;
+
+ *VirtualMemoryMap = mVirtualMemoryTable;
+}
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