CpuMmuInit.c File Reference

#include <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/CacheMaintenanceLib.h>
#include <Library/CpuMmuLib.h>
#include <Library/DebugLib.h>
#include <Register/LoongArch64/Csr.h>
#include <Register/LoongArch64/Cpucfg.h>

Go to the source code of this file.

Macros
#define	DEFAULT_BIT_WIDTH_PER_LEVEL   (EFI_PAGE_SHIFT - 3)

Functions
STATIC UINT8	DecidePageWalkConfiguration (IN OUT UINT64 *PageWalkCfg OPTIONAL, IN UINT8 BitWidth)
EFI_STATUS EFIAPI	ConfigureMemoryManagementUnit (IN EFI_MEMORY_DESCRIPTOR *MemoryTable)

Detailed Description

CPU Memory Map Unit Initialization library instance.

Copyright (c) 2024 Loongson Technology Corporation Limited. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file CpuMmuInit.c.

Macro Definition Documentation

DEFAULT_BIT_WIDTH_PER_LEVEL

#define DEFAULT_BIT_WIDTH_PER_LEVEL   (EFI_PAGE_SHIFT - 3)

Definition at line 30 of file CpuMmuInit.c.

Function Documentation

ConfigureMemoryManagementUnit()

EFI_STATUS EFIAPI ConfigureMemoryManagementUnit

(

IN EFI_MEMORY_DESCRIPTOR *

MemoryTable

)

Create a page table and initialize the memory management unit(MMU).

Parameters

[in]

MemoryTable

A pointer to a memory ragion table.

Return values

EFI_SUCCESS

Configure MMU successfully. EFI_INVALID_PARAMETER MemoryTable is NULL. EFI_UNSUPPORTED MemoryRegionMap failed or out of memory space or size not aligned or MaxLivel out of bound.

Definition at line 121 of file CpuMmuInit.c.

DecidePageWalkConfiguration()

STATIC UINT8 DecidePageWalkConfiguration	(	IN OUT UINT64 *PageWalkCfg	OPTIONAL,
		IN UINT8	BitWidth
	)

Decided page walker width, level.

Parameters

[in,out]	PageWalkCfg	Page walker value instance.
[in]	BitWidt	The bit width what you want, 0 is means use the default bit width.

Return values

PageTableLevelNum

The max page table level.

Definition at line 42 of file CpuMmuInit.c.