ramdisk.c File Reference

#include "ramdisk.h"
#include "dtb.h"
#include "physm.h"
#include "ctype.h"
#include "vmmngr.h"
#include "pe.h"
#include "aurora.h"

Include dependency graph for ramdisk.c:

Macros
#define	SECTOR_SIZE   512
#define	FAT_EOC_MARK   0xFFFFFFF8

Typedefs
typedef void(*	entry) ()

Functions
void	LBRamdiskReadSector (uint32_t lba, size_t counts, uint8_t *buffer)
struct	__attribute__ ((packed))
uint64_t	FatClusterToSector (uint64_t cluster)
void	FatToDOSFilename (const char *filename, char *fname, unsigned int fname_len)
uint32_t	ExtractEFICluster ()
uint32_t	ExtractXeneva (uint32_t parentCluster)
uint64_t	align_to_page (uint64_t size)
uint32_t	ExtractKernel (uint32_t parentClust)
uint32_t	FatReadFAT (uint64_t clusterIndex)
void	ReadKernelFile (uint32_t firstCluster)
void	LoadKernelFile ()
void	LBRamdiskInitialize ()
void	LBRamdiskJumpToKernel (uint64_t stack, size_t stacksz, KERNEL_BOOT_INFO *info)
uint64_t	LBRamdiskGetStartAddress ()
uint64_t	LBRamdiskGetEndAddress ()

Variables
uint64_t	ramdisk_start
uint64_t	ramdisk_end
uint64_t	sectorPerCluster
uint64_t	RootSector
uint64_t	ClusterBeginLBA
uint64_t	sectPerFAT32
uint64_t	fatBeginLBA
uint64_t	kernelSize
uint8_t	ScratchPad [4096]
uint64_t	kernelAddr = 0xFFFFC00000000000
uint64_t	loadAddr = 0xFFFFD00000000000
uint64_t	loadAddrLast
entry	ent

Macro Definition Documentation

FAT_EOC_MARK

#define FAT_EOC_MARK   0xFFFFFFF8

SECTOR_SIZE

#define SECTOR_SIZE   512

Typedef Documentation

entry

typedef void(* entry) ()

Function Documentation

__attribute__()

struct __attribute__

(

(packed)

)

align_to_page()

uint64_t align_to_page

(

uint64_t

size

)

ExtractEFICluster()

uint32_t ExtractEFICluster

(

)

ExtractKernel()

uint32_t ExtractKernel

(

uint32_t

parentClust

)

ExtractXeneva()

uint32_t ExtractXeneva

(

uint32_t

parentCluster

)

FatClusterToSector()

uint64_t FatClusterToSector

(

uint64_t

cluster

)

FatReadFAT()

uint32_t FatReadFAT

(

uint64_t

clusterIndex

)

FatToDOSFilename()

void FatToDOSFilename	(	const char *	filename,
		char *	fname,
		unsigned int	fname_len
	)

FatToDOSFilename – converts a given filename to MSDOS file name format

Parameters

filename	– filename for conversion
fname	– pointer to the buffer to store the conversion
fname_length	– manly 11 buffer[0-8] – filename, buffer[9-11] – file extension

LBRamdiskGetEndAddress()

uint64_t LBRamdiskGetEndAddress

(

)

LBRamdiskGetStartAddress()

uint64_t LBRamdiskGetStartAddress

(

)

LBRamdiskInitialize()

void LBRamdiskInitialize

(

)

BSD 2-Clause License

Copyright (c) 2022-2025, 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.

LBRamdiskJumpToKernel()

void LBRamdiskJumpToKernel	(	uint64_t	stack,
		size_t	stacksz,
		KERNEL_BOOT_INFO *	info
	)

LBRamdiskReadSector()

void LBRamdiskReadSector	(	uint32_t	lba,
		size_t	counts,
		uint8_t *	buffer
	)

LoadKernelFile()

void LoadKernelFile

(

)

ReadKernelFile()

void ReadKernelFile

(

uint32_t

firstCluster

)

Variable Documentation

ClusterBeginLBA

uint64_t ClusterBeginLBA

ent

entry ent

fatBeginLBA

uint64_t fatBeginLBA

kernelAddr

uint64_t kernelAddr = 0xFFFFC00000000000

kernelSize

uint64_t kernelSize

loadAddr

uint64_t loadAddr = 0xFFFFD00000000000

loadAddrLast

uint64_t loadAddrLast

ramdisk_end

uint64_t ramdisk_end

ramdisk_start

uint64_t ramdisk_start

BSD 2-Clause License

Copyright (c) 2022-2025, 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.

RootSector

uint64_t RootSector

ScratchPad

uint8_t ScratchPad[4096]

sectorPerCluster

uint64_t sectorPerCluster

sectPerFAT32

uint64_t sectPerFAT32