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 */ 8 extern 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 23 static 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 30 static 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 36 static inline pmd_t *pmd_off_k(unsigned long virt) 37 { 38 return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt); 39 } 40 41 struct 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 49 const struct mem_type *get_mem_type(unsigned int type); 50 51 extern 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 74 struct static_vm { 75 struct vm_struct vm; 76 struct list_head list; 77 }; 78 79 extern struct list_head static_vmlist; 80 extern struct static_vm *find_static_vm_vaddr(void *vaddr); 81 extern __init void add_static_vm_early(struct static_vm *svm); 82 83 #endif 84 85 #ifdef CONFIG_ZONE_DMA 86 extern phys_addr_t arm_dma_limit; 87 extern 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 93 extern phys_addr_t arm_lowmem_limit; 94 95 void __init bootmem_init(void); 96 void arm_mm_memblock_reserve(void); 97 void dma_contiguous_remap(void); 98 99 unsigned long __clear_cr(unsigned long mask); 100