Nigel
50bf952a49
- Added boot device info parsing to the kernel - Added a pointer in the kernel to our pre-kernel BootInfo structure - Created a layout for the FAT driver - Created a layout for the virtual filesystem - Separated IDE driver from the basic atapio driver. This will ensure we are not using one or the other - The create_harddrive shell script will now actually build a harddrive image of the kernel - The virtual filesystem initializes and creates a filesystem structure for every FAT16 partition in the master boot record
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
#pragma once
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#include <stdint-gcc.h>
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#include "PartitionTableEntry.h"
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#include "../../../memory/KernelHeap.h"
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#include "../../ata pio/ATAPIO.h"
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struct MBR {
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uint8_t code [440];
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uint32_t uniqueID;
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uint16_t Reserved;
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struct PartitionTableEntry TableEntries[4];
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uint16_t ValidBootsector;
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}__attribute__((packed));
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inline MBR* GetPartitions(bool DEBUG = false){
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const int C = 0;
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const int H = 0;
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const int HPC = 16;
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const int SPT = 63;
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int S =1;
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uint32_t LBA = (C*HPC+H) * SPT + (S-1);
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MBR* mbr =(MBR*) malloc(sizeof (MBR));
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ATAPIO::Read(ATAPIO_PORT::Primary, DEVICE_DRIVE::MASTER, LBA, (uint16_t*)mbr);
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printf("MBR (In Memory) Address 0x%x, Size = %d\n", mbr, sizeof (MBR));
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if(DEBUG){
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printf("BootSector: 0x%x\n", mbr->ValidBootsector );
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for( int i = 0 ; i < 4 ; i ++){
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PartitionTableEntry PT = mbr->TableEntries[i];
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printf("Partition %d [ %d sectors, PartitionType: 0x%x, 0x%x, \nLBA Start: 0x%x ]\n" ,
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i, PT.Number_sectors_inPartition, PT.PartitionType, mbr->uniqueID, PT.LBA_partition_start );
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}
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}
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return mbr;
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}
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