13ff1559eSRussell King #ifdef CONFIG_MMU 2ed8fd218SJoonsoo Kim #include <linux/list.h> 3ed8fd218SJoonsoo Kim #include <linux/vmalloc.h> 43ff1559eSRussell King 55f0fbf9eSNicolas Pitre /* the upper-most page table pointer */ 61b2e2b73SRussell King extern pmd_t *top_pmd; 71b2e2b73SRussell King 8de27c308SRussell King /* 9de27c308SRussell King * 0xffff8000 to 0xffffffff is reserved for any ARM architecture 10de27c308SRussell King * specific hacks for copying pages efficiently, while 0xffff4000 11de27c308SRussell King * is reserved for VIPT aliasing flushing by generic code. 12de27c308SRussell King * 13de27c308SRussell King * Note that we don't allow VIPT aliasing caches with SMP. 14de27c308SRussell King */ 15de27c308SRussell King #define COPYPAGE_MINICACHE 0xffff8000 16de27c308SRussell King #define COPYPAGE_V6_FROM 0xffff8000 17de27c308SRussell King #define COPYPAGE_V6_TO 0xffffc000 18de27c308SRussell King /* PFN alias flushing, for VIPT caches */ 19de27c308SRussell King #define FLUSH_ALIAS_START 0xffff4000 20de27c308SRussell King 2167ece144SRussell King static inline void set_top_pte(unsigned long va, pte_t pte) 2267ece144SRussell King { 2360db4fcfSRussell King pte_t *ptep = pte_offset_kernel(top_pmd, va); 2460db4fcfSRussell King set_pte_ext(ptep, pte, 0); 2567ece144SRussell King local_flush_tlb_kernel_page(va); 2667ece144SRussell King } 2767ece144SRussell King 280d31fe47SRussell King static inline pte_t get_top_pte(unsigned long va) 290d31fe47SRussell King { 3060db4fcfSRussell King pte_t *ptep = pte_offset_kernel(top_pmd, va); 3160db4fcfSRussell King return *ptep; 320d31fe47SRussell King } 330d31fe47SRussell King 341b2e2b73SRussell King static inline pmd_t *pmd_off_k(unsigned long virt) 351b2e2b73SRussell King { 36cc780af5SRussell King return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt); 371b2e2b73SRussell King } 381b2e2b73SRussell King 39b29e9f5eSRussell King struct mem_type { 40f6e3354dSRussell King pteval_t prot_pte; 41442e70c0SCatalin Marinas pmdval_t prot_l1; 42442e70c0SCatalin Marinas pmdval_t prot_sect; 43b29e9f5eSRussell King unsigned int domain; 44b29e9f5eSRussell King }; 45b29e9f5eSRussell King 46b29e9f5eSRussell King const struct mem_type *get_mem_type(unsigned int type); 47b29e9f5eSRussell King 487b0a1003SRussell King extern void __flush_dcache_page(struct address_space *mapping, struct page *page); 497b0a1003SRussell King 50576d2f25SNicolas Pitre /* 51576d2f25SNicolas Pitre * ARM specific vm_struct->flags bits. 52576d2f25SNicolas Pitre */ 53576d2f25SNicolas Pitre 54576d2f25SNicolas Pitre /* (super)section-mapped I/O regions used by ioremap()/iounmap() */ 55576d2f25SNicolas Pitre #define VM_ARM_SECTION_MAPPING 0x80000000 56576d2f25SNicolas Pitre 57576d2f25SNicolas Pitre /* permanent static mappings from iotable_init() */ 58576d2f25SNicolas Pitre #define VM_ARM_STATIC_MAPPING 0x40000000 59576d2f25SNicolas Pitre 60a849088aSRussell King /* empty mapping */ 61a849088aSRussell King #define VM_ARM_EMPTY_MAPPING 0x20000000 62a849088aSRussell King 63576d2f25SNicolas Pitre /* mapping type (attributes) for permanent static mappings */ 64576d2f25SNicolas Pitre #define VM_ARM_MTYPE(mt) ((mt) << 20) 65576d2f25SNicolas Pitre #define VM_ARM_MTYPE_MASK (0x1f << 20) 66576d2f25SNicolas Pitre 67e9da6e99SMarek Szyprowski /* consistent regions used by dma_alloc_attrs() */ 68e9da6e99SMarek Szyprowski #define VM_ARM_DMA_CONSISTENT 0x20000000 69e9da6e99SMarek Szyprowski 70ed8fd218SJoonsoo Kim 71ed8fd218SJoonsoo Kim struct static_vm { 72ed8fd218SJoonsoo Kim struct vm_struct vm; 73ed8fd218SJoonsoo Kim struct list_head list; 74ed8fd218SJoonsoo Kim }; 75ed8fd218SJoonsoo Kim 76ed8fd218SJoonsoo Kim extern struct list_head static_vmlist; 77ed8fd218SJoonsoo Kim extern struct static_vm *find_static_vm_vaddr(void *vaddr); 78ed8fd218SJoonsoo Kim extern __init void add_static_vm_early(struct static_vm *svm); 79ed8fd218SJoonsoo Kim 803ff1559eSRussell King #endif 813ff1559eSRussell King 82022ae537SRussell King #ifdef CONFIG_ZONE_DMA 834986e5c7SMarek Szyprowski extern phys_addr_t arm_dma_limit; 844dcfa600SRussell King extern unsigned long arm_dma_pfn_limit; 85022ae537SRussell King #else 8609b2ad13SRussell King #define arm_dma_limit ((phys_addr_t)~0) 874dcfa600SRussell King #define arm_dma_pfn_limit (~0ul >> PAGE_SHIFT) 88022ae537SRussell King #endif 89022ae537SRussell King 90c7909509SMarek Szyprowski extern phys_addr_t arm_lowmem_limit; 91c7909509SMarek Szyprowski 928d717a52SRussell King void __init bootmem_init(void); 932778f620SRussell King void arm_mm_memblock_reserve(void); 94c7909509SMarek Szyprowski void dma_contiguous_remap(void); 95