src folder -> source folder; makes merging with dev a bit easier.
This commit is contained in:
291
source/kernel/kernel.cpp
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291
source/kernel/kernel.cpp
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#include "kernel.h"
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#define GB4 524288
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#define GB2 262144
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extern "C" void wait_until_shutdown(){
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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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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 BiosParameter block
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uint16_t biosparameterblock[256];
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ATA_DEVICE::Read(BUS_PORT::Primary, DEVICE_DRIVE::MASTER, mbr->TableEntries[0].LBA_partition_start, biosparameterblock);
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BiosParameterBlock* bpb = (BiosParameterBlock*) biosparameterblock;
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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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/**
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* @brief File Allocation Table
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*/
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uint32_t FATAddress = mbr->TableEntries[0].LBA_partition_start + bpb->ReservedSectors ;
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uint16_t FAT[256];
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ATA_DEVICE::Read(BUS_PORT::Primary, DEVICE_DRIVE::MASTER, FATAddress, FAT );
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// Show data in terminal
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for(int i = 0; i < 256; i++ ) {
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printf("%x ", FAT[i]);
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}
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kterm_put('\n');
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uint32_t RootDirectoryRegion = FATAddress + ( bpb->NumberOfFileAllocationTables * bpb->NumberOfSectorsPerFAT );
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uint32_t DataRegion = RootDirectoryRegion + ((bpb->NumberOfDirectoryEntries * 32) / bpb->BytesPerSector );
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uint16_t data2 [256];
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ATA_DEVICE::Read(BUS_PORT::Primary, DEVICE_DRIVE::MASTER, RootDirectoryRegion, data2 );
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DirectoryEntry* RootDirectory = (DirectoryEntry*) data2;
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// List files in root
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for(int i= 0; i < bpb->NumberOfDirectoryEntries ; i++ )
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{
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DirectoryEntry* entry = (DirectoryEntry*)((uint32_t) RootDirectory + (i * sizeof(DirectoryEntry)));
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if( entry->filename[0] == (uint8_t) 0x00 )
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break; // There are no more entries in this directory or the entry is free
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if( entry->attribute & 0x01 == 0x01 || entry->attribute & 0x20 == 0x20)
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continue; // Skip listing if hidden or Achieve flag is set
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// Print the filename;
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for( int n = 0; n < 8; n++ ){
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if(entry->filename[n] == 0x20)
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break;
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kterm_put(entry->filename[n]);
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}kterm_put('\n');
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for( int n = 0; n < 3; n++){
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kterm_put(entry->Extension[n]);
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}kterm_put('\n');
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printf("Attribute: %x \n" , entry->attribute);
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printf("FileSize: %d Bytes\n", entry->FilesizeInBytes);
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if( entry->FilesizeInBytes != 0x0 || entry->attribute & 0x8 == 0x0){
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printf("Show contents");
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printf( "Start cluster of the file: 0x%x\n" , entry->StartingCluster);
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printf("IS it only 1 cluster? %s\n" , FAT[i] == 0xFFFF? "Yes": "No" );
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uint32_t sector = DataRegion + ((entry->StartingCluster - 0x02 ) * bpb->SectorsPerCluster);
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uint16_t dataBlob [256];
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ATA_DEVICE::Read(BUS_PORT::Primary, DEVICE_DRIVE::MASTER, sector, dataBlob );
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for( int n = 0; n < 256; n++)
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{
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kterm_put(dataBlob[n] & 0x00ff);
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kterm_put(dataBlob[n] >> 8);
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}kterm_put('\n');
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}
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printf("======================\n");
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}
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wait_until_shutdown();
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}
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extern "C" void early_main(unsigned long magic, unsigned long addr){
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/**
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* Initialize terminal interface
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* NOTE: This should be done later on , the magic value should be checked first.
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*/
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kterm_init();
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/**
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* Check Multiboot magic number
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* NOTE: Printf call should not be a thing this early on ...
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*/
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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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/**
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* Use the address given as an argument as the pointer
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* to a Multiboot information structure.
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*/
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multiboot_info_t* mbt = (multiboot_info_t*) addr;
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/**
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* Construct our own bootInfo structure
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*/
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BootInfo bootinfo = {};
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/*
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If we got a memory map from our bootloader we
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should be parsing it to find out the memory regions available.
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*/
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if (CHECK_FLAG(mbt->flags, 6))
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{
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/*
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Setup Physical memory managment
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*/
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MemoryInfo meminfo = {};
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bootinfo.memory = &meminfo;
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mapMultibootMemoryMap(bootinfo.memory , mbt);
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printf("Memory size: 0x%x bytes\n", bootinfo.memory->TotalMemory );
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PhysicalMemory memAlloc = PhysicalMemory{};
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memAlloc.setup(bootinfo.memory );
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/*
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Mark already in use sections
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*/
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// Mark kernel memory as used
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printf("Kernel Begin Pointer: 0x%x, Kernel end pointer: 0x%x\n", kernel_begin , kernel_end );
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multiboot_memory_map_t *mmap = (multiboot_memory_map_t*) mbt->mmap_addr;
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for (; (unsigned long) mmap < mbt->mmap_addr + mbt->mmap_length; mmap = (multiboot_memory_map_t *) ((unsigned long) mmap + mmap->size + sizeof(mmap->size))){
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if ( mmap->type == MULTIBOOT_MEMORY_AVAILABLE){
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} else{
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printf("allocate region: 0x%x, size : 0x%x bytes\n", (unsigned) mmap->addr,(unsigned) mmap->len );
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memAlloc.allocate_region((unsigned)mmap->addr , (unsigned)mmap->len);
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}
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}
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printf("allocate region: 0x%x, size : 0x%x bytes\n", kernel_begin, kernel_end - kernel_begin );
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memAlloc.allocate_region(kernel_end, kernel_end - kernel_begin);
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// test alloc_block
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uint8_t* memory = (uint8_t*) memAlloc.allocate_block();
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printf("Got a new pointer: 0x%x\n", memory);
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uint8_t* memory2 = (uint8_t*) memAlloc.allocate_block();
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printf("Got a new pointer: 0x%x\n", memory2);
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memAlloc.free_block((void*) memory);
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uint8_t* newBlockPlse = (uint8_t*) memAlloc.allocate_block();
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// memAlloc.free_block((void*) memory);
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}
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initGDT();
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init_idt();
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// Enable interrupts
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asm volatile("STI");
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init_serial();
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pit_initialise();
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CheckMBT( (multiboot_info_t *) addr);
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startSuperVisorTerminal(&bootinfo);
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kernel_main();
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}
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