1#ifdef CONFIG_MMU 2#include <linux/list.h> 3#include <linux/vmalloc.h> 4 5#include <asm/pgtable.h> 6 7/* the upper-most page table pointer */ 8extern pmd_t *top_pmd; 9 10/* 11 * 0xffff8000 to 0xffffffff is reserved for any ARM architecture 12 * specific hacks for copying pages efficiently, while 0xffff4000 13 * is reserved for VIPT aliasing flushing by generic code. 14 * 15 * Note that we don't allow VIPT aliasing caches with SMP. 16 */ 17#define COPYPAGE_MINICACHE 0xffff8000 18#define COPYPAGE_V6_FROM 0xffff8000 19#define COPYPAGE_V6_TO 0xffffc000 20/* PFN alias flushing, for VIPT caches */ 21#define FLUSH_ALIAS_START 0xffff4000 22 23static inline void set_top_pte(unsigned long va, pte_t pte) 24{ 25 pte_t *ptep = pte_offset_kernel(top_pmd, va); 26 set_pte_ext(ptep, pte, 0); 27 local_flush_tlb_kernel_page(va); 28} 29 30static inline pte_t get_top_pte(unsigned long va) 31{ 32 pte_t *ptep = pte_offset_kernel(top_pmd, va); 33 return *ptep; 34} 35 36static inline pmd_t *pmd_off_k(unsigned long virt) 37{ 38 return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt); 39} 40 41struct mem_type { 42 pteval_t prot_pte; 43 pteval_t prot_pte_s2; 44 pmdval_t prot_l1; 45 pmdval_t prot_sect; 46 unsigned int domain; 47}; 48 49const struct mem_type *get_mem_type(unsigned int type); 50 51extern void __flush_dcache_page(struct address_space *mapping, struct page *page); 52 53/* 54 * ARM specific vm_struct->flags bits. 55 */ 56 57/* (super)section-mapped I/O regions used by ioremap()/iounmap() */ 58#define VM_ARM_SECTION_MAPPING 0x80000000 59 60/* permanent static mappings from iotable_init() */ 61#define VM_ARM_STATIC_MAPPING 0x40000000 62 63/* empty mapping */ 64#define VM_ARM_EMPTY_MAPPING 0x20000000 65 66/* mapping type (attributes) for permanent static mappings */ 67#define VM_ARM_MTYPE(mt) ((mt) << 20) 68#define VM_ARM_MTYPE_MASK (0x1f << 20) 69 70/* consistent regions used by dma_alloc_attrs() */ 71#define VM_ARM_DMA_CONSISTENT 0x20000000 72 73 74struct static_vm { 75 struct vm_struct vm; 76 struct list_head list; 77}; 78 79extern struct list_head static_vmlist; 80extern struct static_vm *find_static_vm_vaddr(void *vaddr); 81extern __init void add_static_vm_early(struct static_vm *svm); 82 83#endif 84 85#ifdef CONFIG_ZONE_DMA 86extern phys_addr_t arm_dma_limit; 87extern unsigned long arm_dma_pfn_limit; 88#else 89#define arm_dma_limit ((phys_addr_t)~0) 90#define arm_dma_pfn_limit (~0ul >> PAGE_SHIFT) 91#endif 92 93extern phys_addr_t arm_lowmem_limit; 94 95void __init bootmem_init(void); 96void arm_mm_memblock_reserve(void); 97void dma_contiguous_remap(void); 98 99unsigned long __clear_cr(unsigned long mask); 100