/* \brief Handles archetecture-specific initialization for i586.
*
* This function initializes various tables, paging, and the initial heap,
* various timers, then passes the locations of modules and elf info (if any)
* to \ref kmain.
*
* @param mboot The multiboot header passed by a compliant bootloader.
* @param blarg At the moment, the initial stack placement. This parameter
* is unused and will be removed soon.
* @param magic The multiboot header checksum.
*/
void arch_init( multiboot_header_t *mboot, int blarg, int magic ){
void *modules = 0;
void *elfinfo = 0;
init_serial( );
// Take care of multiboot stuff...
if ( magic != 0x2badb002 )
panic( "Need multiboot-compliant bootloader to boot Helix kernel.\n" );
if ( mboot->flags & MULTIBOOT_FLAG_ELF )
elfinfo = &mboot->elf_headers;
if ( mboot->flags & MULTIBOOT_FLAG_MODS && mboot->mods_count ){
modules = *(int **)mboot->mods_addr;
early_placement = *(int *)(mboot->mods_addr + 4);
}
// Set up memory utils
init_tables( );
init_paging( mboot->mem_lower + mboot->mem_upper );
kheap = kmalloc_early( sizeof( mheap_t ), 0 );
init_heap( kheap, kernel_dir, 0xd0000000, PAGE_SIZE * 32 );
init_timer( );
kmain( 0, modules, elfinfo );
while( 1 ) asm volatile( "hlt" );
}
void init(void)
{
char *origen, *destino;
long i, largo;
/* Copiar el kernel */
destino = (char *) KERNEL_FCODE;
origen = (char *) POSICION_LOADER;
for(i=0 ; i < (long) &_code_size; i++)
*(destino+i) = *(origen+i);
__asm__ __volatile__ ("address_X: jmp (address_X - 0xff800000 + 5) ");
/* Copiar Datos */
destino = (char *) KERNEL_FDATA;
origen = (char *) POSICION_LOADER + (long) &_code_size;
largo= (long) &_data_size;
for(i=0; i < largo ; i++)
*(destino+i) = *(origen+i);
/* Una vez copiado todo en su lugar, saltamos a funcion ppal*/
kmain();
}
//! kernel entry point is called by boot loader
void __cdecl kernel_entry (multiboot_info* bootinfo) {
#ifdef ARCH_X86
// Set registers for protected mode
_asm {
cli
mov ax, 10h
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
}
#endif //ARCH_X86
//dx 레지스터에는 커널의 크기가 담겨 있다.
//다른값으로 씌워지기 전에 값을 얻어낸다.
_asm mov word ptr[g_kernelSize], dx
InitializeConstructors();
kmain (bootinfo);
Exit ();
console.Print("kernel_entry : Shutdown Complete. Halting system\n");
#ifdef ARCH_X86
_asm {
cli
hlt
}
#endif
for (;;);
}
void _start(void)
{
/* copy data from rom */
if (&__data_start != &__data_start_rom) {
unsigned int *src = &__data_start_rom;
unsigned int *dest = &__data_start;
while (dest != &__data_end)
*dest++ = *src++;
}
/* zero out bss */
unsigned int *bss = &__bss_start;
while (bss != &__bss_end)
*bss++ = 0;
kmain();
}
/* 0x1000 */
void _start(void)
{
clearscreen();
init_gdt();
print("Loading IDT\n");
init_idt();
print("Loading PIC\n");
init_pic();
print("Running kmain()\n");
sti;
kmain(); /* Call kernel's kmain() */
while (1)
{ /* Never return */
print("hlt;\n");
}
}
/* This is the first C function ever called.
* it gets called from the boot loader assembly */
void entry() {
kmain();
__asm__("cli\n\t"
"hlt");
}
extern "C" void handler_reset() {
setup_clock();
copy(&__data_start, &__data_end, &__data_load);
fill(&__bss_start, &__bss_end, 0);
kmain();
}
