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