Method ATADiskDevice

Kernel/src/storage/atadrive.cpp:10–41

namespace ATA{
    ATADiskDevice::ATADiskDevice(int port, int drive) {
        this->port = port;
        this->drive = drive;

        prdBufferPhys = Memory::AllocatePhysicalMemoryBlock();
        prdBuffer = (uint8_t*)Memory::KernelAllocate4KPages(1);

        prdtPhys = Memory::AllocatePhysicalMemoryBlock();
        prdt = (uint64_t*)Memory::GetIOMapping(prdtPhys);

        Memory::KernelMapVirtualMemory4K(prdBufferPhys, (uintptr_t)prdBuffer, 1);
        Memory::KernelMapVirtualMemory4K(prdtPhys, (uintptr_t)prdt, 1);

        prd = ATA_PRD_BUFFER((uint64_t)prdBufferPhys) | ((uint64_t)PAGE_SIZE_4K << 32) | ATA_PRD_END; // Assign the buffer, transfer size (4K) and designate the PRDT entry as the last one
        *prdt = prd;

        switch(GPT::Parse(this)){
        case 0:
            Log::Error("ATA Disk ");
            Log::Write(this->port ? "Secondary " : "Primary ");
            Log::Write(this->drive ? "Slave " : "Master ");
            Log::Write("has a corrupted or non-existant GPT. MBR disks are NOT supported.");
            break;
        case -1:
            Log::Error("Disk Error while Parsing GPT for ATA Disk ");
            Log::Write(this->port ? "Secondary " : "Primary ");
            Log::Write(this->drive ? "Slave " : "Master ");
            break;
        }

        InitializePartitions();
    }

    int ATADiskDevice::ReadDiskBlock(uint64_t lba, uint32_t count, void* _buffer){
        uint64_t blockCount = ((count / 512 * 512) < count) ? ((count / 512) + 1) : (count / 512);