Add boot record abstraction and MBR implementation
This commit is contained in:
parent
15ea32dbcd
commit
317d90baf8
65
inc/kernel/filesystem/bootrecords.h
Normal file
65
inc/kernel/filesystem/bootrecords.h
Normal file
|
@ -0,0 +1,65 @@
|
|||
#pragma once
|
||||
#include <stdint.h>
|
||||
#include <stddef.h>
|
||||
|
||||
/************************
|
||||
*** Team Kitty, 2021 ***
|
||||
*** Chroma ***
|
||||
***********************/
|
||||
|
||||
/**
|
||||
* @brief Abstract class for partition table implementations.
|
||||
* The partition table implements a way to store and handle the boot record for any system.
|
||||
* ! Do not instantiate!
|
||||
*/
|
||||
class BasePartitionTable {
|
||||
public:
|
||||
|
||||
// Initialize the partition object
|
||||
virtual void Init() = 0;
|
||||
|
||||
// Get the amount of partitions in the table
|
||||
virtual uint8_t GetPartitions() = 0;
|
||||
|
||||
// Get the offset which, when added to the start of the disk, will provide the start of the given partition.
|
||||
virtual size_t GetPartitionStart(uint8_t PartitionID) = 0;
|
||||
// Get the length of the given partition on disk.
|
||||
virtual size_t GetPartitionSize(uint8_t PartitionID) = 0;
|
||||
|
||||
private:
|
||||
|
||||
static BasePartitionTable* Primary;
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @brief A BasePartitionTable implementation for MBR (BIOS) systems.
|
||||
*/
|
||||
class MBRPartitionTable : public BasePartitionTable {
|
||||
public:
|
||||
|
||||
// Initialize the partition object
|
||||
virtual void Init() override;
|
||||
|
||||
// Get the amount of partitions in the table
|
||||
virtual uint8_t GetPartitions() override;
|
||||
|
||||
// Get the offset which, when added to the start of the disk, will provide the start of the given partition.
|
||||
virtual size_t GetPartitionStart(uint8_t PartitionID) override;
|
||||
// Get the length of the given partition on disk.
|
||||
virtual size_t GetPartitionSize(uint8_t PartitionID) override;
|
||||
|
||||
private:
|
||||
|
||||
// An MBR Partition Table Entry
|
||||
struct MBREntry {
|
||||
uint8_t Status; // 0x80 for "active", 0x00 for inactive, all other values are invalid.
|
||||
uint8_t CHS_First[3]; // Cylinder-Head-Sector address of the first sector in this partition.
|
||||
uint8_t Type; // Partition type. https://en.wikipedia.org/wiki/Partition_type
|
||||
uint8_t CHS_Last[3]; // Cylinder-Head-Sector address of the last sector in this partition.
|
||||
uint32_t LBA_First; // LBA of the first sector in this partition
|
||||
uint32_t SectorCount; // Total count of sectors in this partition
|
||||
} __attribute__((packed));
|
||||
|
||||
MBREntry* Entries;
|
||||
};
|
|
@ -13,7 +13,7 @@
|
|||
* ! Do not instantiate!
|
||||
*/
|
||||
|
||||
class FileSystem {
|
||||
class BaseFileSystem {
|
||||
public:
|
||||
virtual void Init(size_t Sector, size_t Size) = 0;
|
||||
virtual const char* GetName() = 0;
|
||||
|
|
Loading…
Reference in New Issue
Block a user