C++ (Cpp) pmd_alloc_kernel Examples

Example #1

File: ioremap.c Project: dmgerman/linux-pre-history

static int remap_area_pages(unsigned long address, unsigned long phys_addr,
				 unsigned long size, unsigned long flags)
{
	pgd_t * dir;
	unsigned long end = address + size;

	phys_addr -= address;
	dir = pgd_offset(&init_mm, address);
	flush_cache_all();
	if (address >= end)
		BUG();
	do {
		pmd_t *pmd = pmd_alloc_kernel(dir, address);
		if (!pmd)
			return -ENOMEM;
		if (remap_area_pmd(pmd, address, end - address,
					 phys_addr + address, flags))
			return -ENOMEM;
		set_pgdir(address, *dir);
		address = (address + PGDIR_SIZE) & PGDIR_MASK;
		dir++;
	} while (address && (address < end));
	flush_tlb_all();
	return 0;
}

Example #2

int vmalloc_area_pages(unsigned long address, unsigned long size, pgprot_t prot)
{
	pgd_t * dir;
	unsigned long end = address + size;

	dir = pgd_offset_k(address);
	flush_cache_all();
	while (address < end) {
		pmd_t *pmd;
		pgd_t olddir = *dir;

		pmd = pmd_alloc_kernel(dir, address);
		if (!pmd)
			return -ENOMEM;
		if (alloc_area_pmd(pmd, address, end - address, prot))
			return -ENOMEM;
		if (pgd_val(olddir) != pgd_val(*dir))
			set_pgdir(address, *dir);
		address = (address + PGDIR_SIZE) & PGDIR_MASK;
		dir++;
	}
	flush_tlb_all();
	return 0;
}