tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifdef CONFIG_MMU
2
3/* the upper-most page table pointer */
4extern pmd_t *top_pmd;
5
6#define TOP_PTE(x) pte_offset_kernel(top_pmd, x)
7
8static inline pmd_t *pmd_off_k(unsigned long virt)
9{
10 return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
11}
12
13struct mem_type {
14 pteval_t prot_pte;
15 pmdval_t prot_l1;
16 pmdval_t prot_sect;
17 unsigned int domain;
18};
19
20const struct mem_type *get_mem_type(unsigned int type);
21
22extern void __flush_dcache_page(struct address_space *mapping, struct page *page);
23
24/*
25 * ARM specific vm_struct->flags bits.
26 */
27
28/* (super)section-mapped I/O regions used by ioremap()/iounmap() */
29#define VM_ARM_SECTION_MAPPING 0x80000000
30
31/* permanent static mappings from iotable_init() */
32#define VM_ARM_STATIC_MAPPING 0x40000000
33
34/* mapping type (attributes) for permanent static mappings */
35#define VM_ARM_MTYPE(mt) ((mt) << 20)
36#define VM_ARM_MTYPE_MASK (0x1f << 20)
37
38#endif
39
40#ifdef CONFIG_ZONE_DMA
41extern u32 arm_dma_limit;
42#else
43#define arm_dma_limit ((u32)~0)
44#endif
45
46void __init bootmem_init(void);
47void arm_mm_memblock_reserve(void);