void __init paging_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES];
unsigned long lastpfn;
pagetable_init();
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
lastpfn = max_low_pfn;
free_area_init_nodes(max_zone_pfns);
}
/*
* paging_init() continues the virtual memory environment setup which
* was begun by the code in arch/head.S.
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory.
*/
void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES];
memset(zones_size, 0, sizeof(zones_size));
pagetable_init();
pgd_current = swapper_pg_dir;
zones_size[ZONE_NORMAL] = max_mapnr;
/* pass the memory from the bootmem allocator to the main allocator */
free_area_init(zones_size);
flush_dcache_range((unsigned long)empty_zero_page,
(unsigned long)empty_zero_page + PAGE_SIZE);
}
void loader_main(struct multiboot_info *mb)
{
multiboot_module_t *mod;
multiboot_memory_map_t *mmap;
uint32_t kernel_entry, kernel_end;
uint64_t max_addr = 0;
uint64_t max_avail = 0;
int m = 0;
serial_init();
printk("Memory map from multiboot info:\n");
for (mmap = (multiboot_memory_map_t *)mb->mmap_addr;
(uint32_t)mmap < mb->mmap_addr + mb->mmap_length; mmap++) {
m += mmap->len;
printk("%d 0x%llx - 0x%llx [%d] (%d)\n", mmap->size,
mmap->addr,
mmap->addr + mmap->len, m/1024, mmap->type);
max_addr = mmap->addr + mmap->len;
if ( mmap->type == MULTIBOOT_MEMORY_AVAILABLE )
max_avail = max_addr;
}
mod = (multiboot_module_t *) mb->mods_addr;
printk("Found: %s\n", (char *)mod->cmdline);
/* update mod_end with room for bss... we really should find the
bss and fill it with zeros so the kernel doesn't need to worry
about doing the zeroing. */
mod->mod_end = elf_get_end(mod->mod_start);
kernel_entry = elf_get_entry(mod->mod_start);
printk("mod_start: 0x%lx\n", mod->mod_start);
printk("mod_end: 0x%lx\n", mod->mod_end);
printk("max_addr: 0x%llx\n", max_addr);
printk("max_avail: 0x%llx\n", max_avail);
kernel_end = ((mod->mod_end & PAGE_MASK) + PAGE_SIZE);
pagetable_init(max_addr, kernel_end);
gdt_init();
to64_jump(kernel_entry, (uint32_t)mb, max_avail - 8);
}
/*
* paging_init() sets up the page tables - note that the first 8MB are
* already mapped by head.S.
*
* This routines also unmaps the page at virtual kernel address 0, so
* that we can trap those pesky NULL-reference errors in the kernel.
*/
void __init paging_init(void)
{
#ifdef CONFIG_X86_PAE
set_nx();
if (nx_enabled)
printk("NX (Execute Disable) protection: active\n");
#endif
pagetable_init();
load_cr3(swapper_pg_dir);
#ifdef CONFIG_X86_PAE
/*
* We will bail out later - printk doesn't work right now so
* the user would just see a hanging kernel.
*/
if (cpu_has_pae)
set_in_cr4(X86_CR4_PAE);
#endif
__flush_tlb_all();
kmap_init();
}
