initrd.c File Reference

#include <Fs/initrd.h>
#include <aucon.h>
#include <Fs/vdisk.h>
#include <Fs/vfs.h>
#include <Fs/Dev/devfs.h>
#include <Mm/vmmngr.h>
#include <string.h>
#include <Mm/kmalloc.h>
#include <_null.h>
#include <Fs/Fat/Fat.h>
#include <Mm/pmmngr.h>
#include <Drivers/uart.h>

Include dependency graph for initrd.c:

Macros
#define	RAMDISK_SECTOR_SIZE   512
#define	RAMDISK_MAPPING_START   0xFFFFC00000900000

Functions
void	AuRamdiskRead (uint64_t lba, size_t count, uint8_t *buffer)
	AuRamdiskRead – read data from ramdisk.
void	AuRamdiskWrite (uint64_t lba, size_t count, uint8_t *buffer)
	AuRamdiskWrite – write data to ramdisk.
int	AuRamdiskReadCallback (AuVDisk *vdisk, uint64_t lba, uint32_t count, uint64_t *buffer)
int	AuRamdiskWriteCallback (AuVDisk *vdisk, uint64_t lba, uint32_t count, uint64_t *buffer)
void	AuInitrdInitialize (KERNEL_BOOT_INFO *info)
	AuInitrdInitialize – initialize ramdisk.

Variables
uint64_t	ramdisk_start
uint64_t	ramdisk_end

Detailed Description

BSD 2-Clause License

Copyright (c) 2022-2023, Manas Kamal Choudhury All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Macro Definition Documentation

RAMDISK_MAPPING_START

#define RAMDISK_MAPPING_START   0xFFFFC00000900000

RAMDISK_SECTOR_SIZE

#define RAMDISK_SECTOR_SIZE   512

Function Documentation

AuInitrdInitialize()

void AuInitrdInitialize

(

KERNEL_BOOT_INFO *

info

)

AuInitrdInitialize – initialize ramdisk.

Parameters

info	– Pointer to Kernel Boot information

okay before full initialization, we need to grab all the physical address from the ramdisk pointer and map it to kernel higher half address

AuRamdiskRead()

void AuRamdiskRead	(	uint64_t	lba,
		size_t	count,
		uint8_t *	buffer
	)

AuRamdiskRead – read data from ramdisk.

Parameters

lba	– LBA address
count	– number of sectors to read
buffer	– Pointer to buffer to write to

AuRamdiskReadCallback()

int AuRamdiskReadCallback	(	AuVDisk *	vdisk,
		uint64_t	lba,
		uint32_t	count,
		uint64_t *	buffer
	)

AuRamdiskWrite()

void AuRamdiskWrite	(	uint64_t	lba,
		size_t	count,
		uint8_t *	buffer
	)

AuRamdiskWrite – write data to ramdisk.

Parameters

lba	– LBA address
count	– number of sectors to write
buffer	– Pointer to buffer from write to

AuRamdiskWriteCallback()

int AuRamdiskWriteCallback	(	AuVDisk *	vdisk,
		uint64_t	lba,
		uint32_t	count,
		uint64_t *	buffer
	)

Variable Documentation

ramdisk_end

uint64_t ramdisk_end

ramdisk_start

uint64_t ramdisk_start