VIDEO_BUFFER 0xb8000
BASE_WRITE_PAGE 0x2000
#We will save early init information at BASE_WRITE_PAGE+4 (see memory init code)
BASE_WRITE_ADDR (BASE_WRITE_PAGE+128)
AP_FIRST_STACK (BASE_WRITE_ADDR)
AP_LAPIC_BASE_REGISTER (BASE_WRITE_ADDR+4)
AP_COUNT_PHYS_ADDR (BASE_WRITE_ADDR+8)
AP_KERNEL_PG_DIR (BASE_WRITE_ADDR+12)
AP_FINISH_CODE (BASE_WRITE_ADDR+16)
E820_MAP_COUNT (BASE_WRITE_ADDR+20)
E820_MAP_ADDRESS (BASE_WRITE_ADDR+24)
PROTECTED_MODE_STACK 0x1000
KERNEL_VIRT_ADDR 0x80000000
KERNEL_PGDIR_OFFSET (KERNEL_VIRT_ADDR>>20)
KERNEL_STACK_SIZE 0x2000
PAGE_SHIFT 12
PAGE_SIZE (1<<PAGE_SHIFT)
PAGE_MASK ~(PAGE_SIZE-1)
PGD_SHIFT 22
PGD_SIZE (1<<PGD_SHIFT)
PGD_MASK ~(PGD_SIZE-1)