kinfo_t *pre_init(u32_t magic, u32_t ebx)
{
/* Clear BSS */
memset(&_edata, 0, (u32_t)&_end - (u32_t)&_edata);
omap3_ser_init();
/* Get our own copy boot params pointed to by ebx.
* Here we find out whether we should do serial output.
*/
get_parameters(ebx, &kinfo);
/* Make and load a pagetable that will map the kernel
* to where it should be; but first a 1:1 mapping so
* this code stays where it should be.
*/
dcache_clean(); /* clean the caches */
pg_clear();
pg_identity(&kinfo);
kinfo.freepde_start = pg_mapkernel();
pg_load();
vm_enable_paging();
/* Done, return boot info so it can be passed to kmain(). */
return &kinfo;
}
kinfo_t *pre_init(u32_t magic, u32_t ebx)
{
/* Get our own copy boot params pointed to by ebx.
* Here we find out whether we should do serial output.
*/
get_parameters(ebx, &kinfo);
assert(magic == MULTIBOOT_BOOTLOADER_MAGIC);
/* Make and load a pagetable that will map the kernel
* to where it should be; but first a 1:1 mapping so
* this code stays where it should be.
*/
pg_clear();
pg_identity(&kinfo);
kinfo.freepde_start = pg_mapkernel();
pg_load();
vm_enable_paging();
/* Done, return boot info so it can be passed to kmain(). */
return &kinfo;
}
int vm_init(void)
{
slock_init(&global_mem_lock);
#ifdef __ALLOW_VM_SHARE__
vm_share_init(); /* Setup shared memory */
#endif
/**
* The boot loader has handled all of the messy work for us.
* All we need to do is pick up the free map head and kernel
* page directory.
*/
/* The boot strap directly mapped in the null guard page */
vm_unmappage(0x0, k_pgdir);
vmflags_t dir_flags = VM_DIR_READ | VM_DIR_WRIT;
vmflags_t tbl_flags = VM_TBL_READ | VM_TBL_WRIT;
/* Map pages in for our kernel stack */
vm_mappages(KVM_KSTACK_S, KVM_KSTACK_E - KVM_KSTACK_S, k_pgdir,
dir_flags, tbl_flags);
/* Add bootstrap code to the memory pool */
int boot2_s = PGROUNDDOWN(KVM_BOOT2_S) + PGSIZE;
int boot2_e = PGROUNDUP(KVM_BOOT2_E);
int x;
for(x = boot2_s;x < boot2_e;x += PGSIZE)
pfree(x);
/* Clear the TLB */
vm_enable_paging(k_pgdir);
return 0;
}
void segmentation2paging(struct proc * current)
{
/* switch to the current process page tables before turning paging on */
switch_address_space(current);
vm_enable_paging();
}