BarinkOS/src/kernel/kernel.cpp

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#include "kernel.h"
#define GB4 524288
#define GB2 262144
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int memcmp( const void* ptr1, const void* ptr2, size_t num);
extern "C" void kernel_main (void);
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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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)){
PhysicalMemoryManager_initialise( mbt->mmap_addr, GB2/* Seriously dangerous hardcoded memory value*/);
PhysicalMemoryManager_initialise_available_regions(mbt->mmap_addr, mbt->mmap_addr + mbt->mmap_length);
PhysicalMemoryManager_deinitialise_kernel();
extern uint8_t* kernel_begin;
extern uint8_t* kernel_end;
printf("Kernel MemoryMap:\n");
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();
}
int memcmp( const void* ptr1, const void* ptr2, size_t num)
{
const unsigned char * cs = (const unsigned char*) ptr1;
const unsigned char * ct = (const unsigned char*) ptr2;
for (int i = 0 ; i < num ; i++, cs++, ct++ ){
if( *cs < *ct){
return -1;
} else if( *cs > *ct){
return 1;
}
}
return 0;
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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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// Enumerate the PCI bus
PCI_Enumerate();
TestIDEController();
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int devNumber = 0 ;
for ( auto device : ide_devices){
if (!device.Reserved)
continue;
printf("Device %d\n" , devNumber);
printf (" Device on Channel: (0x%x) %s\n" ,device.Channel, device.Channel == 0 ? "Primary" : "Secondary");
printf (" Device drive:(0x%x) %s\n" , device.Drive, device.Drive? "Slave" : "Master");
printf (" Device Type:(0x%x) %s\n" , device.Type, device.Type ? "ATAPI" : "ATA");
devNumber ++;
}
// ATAPI_DEVICE::isPacketDevice();
ATAPI_DEVICE::Identify(ATA_SECONDARY, DEVICE_DRIVE::MASTER);
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while (true){
//Read time indefinetely
read_rtc();
printf( "UTC time: %02d-%02d-%02d %02d:%02d:%02d [ Formatted as YY-MM-DD h:mm:ss]\r" ,year, month, day, hour, minute, second);
delay(1000);
}
}