7136d5491e
Due to the way we inherited the formerly fixed PCDs to describe the system memory base and size from ArmPlatformPkg, we ended up with a MemoryInit PEIM that relies on dynamic PCDs to communicate the size of system memory between the constructor of one of its library dependencies and the core module. This is unnecessary, and forces us to incorporate the PCD PEIM as well, for no good reason. So instead, let's use a HOB. Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
125 lines
3.9 KiB
C
125 lines
3.9 KiB
C
/** @file
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Copyright (c) 2014-2017, Linaro Limited. All rights reserved.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Uefi.h>
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#include <Pi/PiMultiPhase.h>
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#include <Library/ArmLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Library/MemoryAllocationLib.h>
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// Number of Virtual Memory Map Descriptors
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#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 5
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//
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// mach-virt's core peripherals such as the UART, the GIC and the RTC are
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// all mapped in the 'miscellaneous device I/O' region, which we just map
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// in its entirety rather than device by device. Note that it does not
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// cover any of the NOR flash banks or PCI resource windows.
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//
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#define MACH_VIRT_PERIPH_BASE 0x08000000
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#define MACH_VIRT_PERIPH_SIZE SIZE_128MB
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/**
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Default library constructur that obtains the memory size from a PCD.
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@return Always returns RETURN_SUCCESS
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**/
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RETURN_STATUS
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EFIAPI
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QemuVirtMemInfoLibConstructor (
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VOID
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)
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{
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UINT64 Size;
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VOID *Hob;
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Size = PcdGet64 (PcdSystemMemorySize);
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Hob = BuildGuidDataHob (&gArmVirtSystemMemorySizeGuid, &Size, sizeof Size);
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ASSERT (Hob != NULL);
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return RETURN_SUCCESS;
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}
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/**
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Return the Virtual Memory Map of your platform
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This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
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on your platform.
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@param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
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describing a Physical-to-Virtual Memory
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mapping. This array must be ended by a
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zero-filled entry. The allocated memory
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will not be freed.
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**/
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VOID
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ArmVirtGetMemoryMap (
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OUT ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
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)
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{
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ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
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VOID *MemorySizeHob;
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ASSERT (VirtualMemoryMap != NULL);
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MemorySizeHob = GetFirstGuidHob (&gArmVirtSystemMemorySizeGuid);
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ASSERT (MemorySizeHob != NULL);
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if (MemorySizeHob == NULL) {
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return;
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}
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VirtualMemoryTable = AllocatePool (
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sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
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MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
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);
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if (VirtualMemoryTable == NULL) {
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DEBUG ((DEBUG_ERROR, "%a: Error: Failed AllocatePool()\n", __FUNCTION__));
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return;
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}
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// System DRAM
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VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
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VirtualMemoryTable[0].VirtualBase = VirtualMemoryTable[0].PhysicalBase;
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VirtualMemoryTable[0].Length = *(UINT64 *)GET_GUID_HOB_DATA (MemorySizeHob);
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VirtualMemoryTable[0].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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DEBUG ((
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DEBUG_INFO,
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"%a: Dumping System DRAM Memory Map:\n"
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"\tPhysicalBase: 0x%lX\n"
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"\tVirtualBase: 0x%lX\n"
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"\tLength: 0x%lX\n",
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__FUNCTION__,
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VirtualMemoryTable[0].PhysicalBase,
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VirtualMemoryTable[0].VirtualBase,
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VirtualMemoryTable[0].Length
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));
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// Memory mapped peripherals (UART, RTC, GIC, virtio-mmio, etc)
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VirtualMemoryTable[1].PhysicalBase = MACH_VIRT_PERIPH_BASE;
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VirtualMemoryTable[1].VirtualBase = MACH_VIRT_PERIPH_BASE;
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VirtualMemoryTable[1].Length = MACH_VIRT_PERIPH_SIZE;
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VirtualMemoryTable[1].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
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// Map the FV region as normal executable memory
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VirtualMemoryTable[2].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
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VirtualMemoryTable[2].VirtualBase = VirtualMemoryTable[2].PhysicalBase;
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VirtualMemoryTable[2].Length = FixedPcdGet32 (PcdFvSize);
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VirtualMemoryTable[2].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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// End of Table
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ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
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*VirtualMemoryMap = VirtualMemoryTable;
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}
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