/* Page directory with kernel mappings only. */
uint32_t *base_page_dir;
-/* -mlfqs:
- If false (default), use round-robin scheduler.
- If true, use multi-level feedback queue scheduler. */
-bool enable_mlfqs;
-
#ifdef FILESYS
/* -f: Format the file system? */
static bool format_filesys;
{
uint32_t *pd, *pt;
size_t page;
+ extern char _start, _end_kernel_text;
pd = base_page_dir = palloc_get_page (PAL_ASSERT | PAL_ZERO);
pt = NULL;
for (page = 0; page < ram_pages; page++)
{
uintptr_t paddr = page * PGSIZE;
- void *vaddr = ptov (paddr);
+ char *vaddr = ptov (paddr);
size_t pde_idx = pd_no (vaddr);
size_t pte_idx = pt_no (vaddr);
+ bool in_kernel_text = &_start <= vaddr && vaddr < &_end_kernel_text;
if (pd[pde_idx] == 0)
{
pd[pde_idx] = pde_create (pt);
}
- pt[pte_idx] = pte_create_kernel (vaddr, true);
+ pt[pte_idx] = pte_create_kernel (vaddr, !in_kernel_text);
}
/* Store the physical address of the page directory into CR3
else if (!strcmp (name, "-rs"))
random_init (atoi (value));
else if (!strcmp (name, "-mlfqs"))
- enable_mlfqs = true;
+ thread_mlfqs = true;
#ifdef USERPROG
else if (!strcmp (name, "-ul"))
user_page_limit = atoi (value);
/* Powers down the machine we're running on,
- as long as we're running on Bochs or qemu. */
+ as long as we're running on Bochs or QEMU. */
void
power_off (void)
{
for (p = s; *p != '\0'; p++)
outb (0x8900, *p);
+ asm ("cli; hlt");
+ printf ("still running...\n");
for (;;);
}