void boot(void)
{
// note: function changes rsp, local stack variables can't be practically used
register char *temp1, *temp2;
uint32_t* modulep;
void* physfree;
__asm__(
"movq %%rsp, %0;"
"movq %1, %%rsp;"
:"=g"(loader_stack)
:"r"(&stack[INITIAL_STACK_SIZE])
);
setup_tss();
reload_gdt();
reload_idt();
irq_install();
timer_install();
keyboard_install();
__asm__("sti");
modulep = (uint32_t*)((char*)(uint64_t)loader_stack[3] + (uint64_t)&kernmem - (uint64_t)&physbase);
physfree = (void*)(uint64_t)loader_stack[4];
kphysfree = physfree;
mm_phy_init(modulep);
vmmgr_init();
vmmgr_page_allocator_init();
cls();
scheduler_init();
/*start(
(uint32_t*)((char*)(uint64_t)loader_stack[3] + (uint64_t)&kernmem - (uint64_t)&physbase),
&physbase,
(void*)(uint64_t)loader_stack[4]
);*/
for(
temp1 = "!!!!! start() returned !!!!!", temp2 = (char*)0xb8000;
*temp1;
temp1 += 1, temp2 += 2
) *temp2 = *temp1;
while(1);
}
void start(uint32_t* modulep, void* physbase, void* physfree)
{
//Memory Init
mm_init(modulep,physbase,physfree);
//Memory for PCI
pages_for_ahci_start_virtual = (uint64_t *)kmalloc_ahci(32*4096);
pages_for_ahci_start = (uint64_t *)PADDR(pages_for_ahci_start_virtual);
pages_for_ahci_start = (uint64_t *)(((uint64_t)pages_for_ahci_start+0x0FFF) & ~ 0x0FFF);
pages_for_ahci_start_virtual = (uint64_t *)(((uint64_t)pages_for_ahci_start_virtual+0x0FFF) & ~ 0x0FFF);
// print("\n vir %x %x", pages_for_ahci_start_virtual, pages_for_ahci_start_virtual + 32*4096);
// print("\n phy %x %x", pages_for_ahci_start, pages_for_ahci_start + 32*4096);
//Initial setup
reload_gdt();
reload_idt();
load_irq();
setup_tss();
print_line(30, 0, "Welcome To SBUnix");
//Kernel process that will be at 0th place in ready queue
struct task_struct *pcb0 = (struct task_struct *)kmalloc(sizeof(struct task_struct)); //kernel
pcb0->pml4e =(uint64_t)boot_pml4e; // kernel's page table
pcb0->cr3 = boot_cr3; // kernel's page table
pcb0->pid = 0; // I'm kernel init process so pid 0
pcb0->stack =(uint64_t *)stack; //my stack is already created by prof :)
process_count = 0; //at this point we don't have any other process in ready_queue so go ahead and create one and update this
sleeping_process_count = 0; // at this point no body is sleeping
// initialize processes queue
int i=0;
for(i=0;i<100;i++) {
zombie_queue[i] = 0; // no process is zombie
}
ready_queue[0] =(uint64_t )pcb0; //kernel
//User processes for test
char fname1[]="bin/sh"; //Shell program
// char fname2[]="bin/malloc"; //Scanf and malloc
// char fname3[]="bin/fork"; // Fork test
// char fname4[]="bin/fs"; // Fork test
// char fname5[]="bin/execvpe"; // Execvpe test
struct task_struct *pcb1 = malloc_pcb(fname1); // If you remove this shell wont start
// struct task_struct *pcb2 = malloc_pcb(fname5);
// struct task_struct *pcb3 = malloc_pcb(fname2);
// struct task_struct *pcb4 = malloc_pcb(fname3);
//struct task_struct *pcb5 = malloc_pcb(fname4);
//print("pcb1 %x pcb2 %x rsp1 %x rsp2 %x\n",pcb1,pcb2,pcb1->rsp,pcb2->rsp);
print("pointer %p",pcb1);
//print("pointer %p",pcb2);
//print("pointer %p",pcb3);
//print("pointer %p",pcb4);
//print("pointer %p",pcb5);
//Initialize tarfs and Hard disk file system
tarfs_init();
probe_port((HBA_MEM *)(0xFFFFFFFF00000000+(uintptr_t)bar5));
inialize_sata_table();
asm volatile("mov $0x2b,%ax");
asm volatile("ltr %ax");
init_timer();
__asm__("sti");
while(1);
}
