83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
#include "kernel.h"
|
|
#define GB4 524288
|
|
#define GB2 262144
|
|
|
|
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){
|
|
/** initialize terminal interface */
|
|
kterm_init();
|
|
|
|
if (magic != MULTIBOOT_BOOTLOADER_MAGIC){
|
|
printf("Invalid magic number: 0x%x\n", magic);
|
|
return;
|
|
}
|
|
|
|
CheckMBT( (multiboot_info_t *) addr);
|
|
|
|
multiboot_info_t* mbt = (multiboot_info_t*) addr;
|
|
|
|
/* Are mmap_* valid? */
|
|
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);
|
|
}
|
|
|
|
initGDT();
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
extern "C" void kernel_main (void) {
|
|
|
|
printf("call to init serial\n");
|
|
init_serial();
|
|
print_serial("Serial port initialized!");
|
|
|
|
|
|
|
|
// Enumerate the PCI bus
|
|
PCI_Enumerate();
|
|
|
|
|
|
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);
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|