Nigel
fb2a19e11d
The proper reading of folders and files is not yet implemented. Although it is close.
136 lines
4.4 KiB
C++
136 lines
4.4 KiB
C++
#include "kernel.h"
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#define GB4 524288
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#define GB2 262144
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extern "C" void kernel_main (void);
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extern "C" void early_main(unsigned long magic, unsigned long addr){
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/** initialize terminal interface */
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kterm_init();
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if (magic != MULTIBOOT_BOOTLOADER_MAGIC){
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printf("Invalid magic number: 0x%x\n", magic);
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return;
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}
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CheckMBT( (multiboot_info_t *) addr);
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multiboot_info_t* mbt = (multiboot_info_t*) addr;
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/* Are mmap_* valid? */
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if (CHECK_FLAG(mbt->flags, 6)){
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PhysicalMemoryManager_initialise( mbt->mmap_addr, GB2/* Seriously dangerous hardcoded memory value*/);
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PhysicalMemoryManager_initialise_available_regions(mbt->mmap_addr, mbt->mmap_addr + mbt->mmap_length);
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PhysicalMemoryManager_deinitialise_kernel();
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extern uint8_t* kernel_begin;
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extern uint8_t* kernel_end;
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printf("Kernel MemoryMap:\n");
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printf("kernel: 0x%x - 0x%x\n", &kernel_begin , &kernel_end);
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}
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initGDT();
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kernel_main();
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}
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extern "C" void kernel_main (void) {
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printf("call to init serial\n");
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init_serial();
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print_serial("Serial port initialized!");
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RSDPTR* rsd = FindRSD();
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RSDT* rsd_table = getRSDT(rsd);
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// Enumerate the PCI bus
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PCI_Enumerate();
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TestIDEController();
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int devNumber = 0 ;
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for ( auto device : ide_devices){
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if (!device.Reserved)
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continue;
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printf("Device %d\n" , devNumber);
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printf (" Device on Channel: (0x%x) %s\n" ,device.Channel, device.Channel == 0 ? "Primary" : "Secondary");
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printf (" Device drive:(0x%x) %s\n" , device.Drive, device.Drive? "Slave" : "Master");
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printf (" Device Type:(0x%x) %s\n" , device.Type, device.Type ? "ATAPI" : "ATA");
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devNumber ++;
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}
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enum BUS_PORT {
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Primary= 0x1f0,
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Secondary = 0x170
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};
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ATA_DEVICE::Identify((uint16_t) BUS_PORT::Primary, DEVICE_DRIVE::MASTER);
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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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printf("LBA: %d\n" , LBA);
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uint16_t buffer [256];
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ATA_DEVICE::Read(BUS_PORT::Primary, DEVICE_DRIVE::MASTER, LBA, buffer);
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MBR* mbr = (MBR*) buffer;
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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: %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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// Find the super block
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uint16_t superBlock[256];
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ATA_DEVICE::Read(BUS_PORT::Primary, DEVICE_DRIVE::MASTER, mbr->TableEntries[0].LBA_partition_start, superBlock);
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BiosParameterBlock* bpb = (BiosParameterBlock*) superBlock;
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printf("\nBPB: Bytes per Sector %d\n", bpb->BytesPerSector );
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printf("OEM ID: %s\n", bpb->OEM_id);
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printf("Bytes per sector: %d\n", bpb->BytesPerSector);
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printf("Sectors per cluster: %d\n", bpb->SectorsPerCluster);
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printf("Reserved sectors: %d\n", bpb->ReservedSectors);
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printf("Number of FAT: %d\n", bpb->NumberOfFileAllocationTables);
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printf("Number of Dir entries: %d\n", bpb->NumberOfDirectoryEntries);
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printf("Total Sectors in volume: %d\n", bpb->TotalSectorsInLogicalVolume);
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printf("Sectors per FAT: %d\n", bpb->NumberOfSectorsPerFAT);
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uint32_t PartitionAddress = mbr->TableEntries[0].LBA_partition_start *512 ;
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uint32_t RootDirAddress = PartitionAddress + ((bpb->ReservedSectors + bpb->NumberOfSectorsPerFAT * bpb->NumberOfFileAllocationTables ) * bpb->BytesPerSector);
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uint32_t RootDirLBA =RootDirAddress/512;
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uint16_t RootDir [16];
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ATA_DEVICE::Read(BUS_PORT::Primary, DEVICE_DRIVE::MASTER,RootDirLBA, (uint16_t*) RootDir );
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while (true){
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//Read time indefinetely
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read_rtc();
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printf( "UTC time: %02d-%02d-%02d %02d:%02d:%02d [ Formatted as YY-MM-DD h:mm:ss]\r" ,year, month, day, hour, minute, second);
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delay(1000);
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}
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}
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