13ff1559eSRussell King #ifdef CONFIG_MMU 23ff1559eSRussell King 35f0fbf9eSNicolas Pitre /* the upper-most page table pointer */ 41b2e2b73SRussell King extern pmd_t *top_pmd; 51b2e2b73SRussell King 6de27c308SRussell King /* 7de27c308SRussell King * 0xffff8000 to 0xffffffff is reserved for any ARM architecture 8de27c308SRussell King * specific hacks for copying pages efficiently, while 0xffff4000 9de27c308SRussell King * is reserved for VIPT aliasing flushing by generic code. 10de27c308SRussell King * 11de27c308SRussell King * Note that we don't allow VIPT aliasing caches with SMP. 12de27c308SRussell King */ 13de27c308SRussell King #define COPYPAGE_MINICACHE 0xffff8000 14de27c308SRussell King #define COPYPAGE_V6_FROM 0xffff8000 15de27c308SRussell King #define COPYPAGE_V6_TO 0xffffc000 16de27c308SRussell King /* PFN alias flushing, for VIPT caches */ 17de27c308SRussell King #define FLUSH_ALIAS_START 0xffff4000 18de27c308SRussell King 1967ece144SRussell King static inline void set_top_pte(unsigned long va, pte_t pte) 2067ece144SRussell King { 2160db4fcfSRussell King pte_t *ptep = pte_offset_kernel(top_pmd, va); 2260db4fcfSRussell King set_pte_ext(ptep, pte, 0); 2367ece144SRussell King local_flush_tlb_kernel_page(va); 2467ece144SRussell King } 2567ece144SRussell King 260d31fe47SRussell King static inline pte_t get_top_pte(unsigned long va) 270d31fe47SRussell King { 2860db4fcfSRussell King pte_t *ptep = pte_offset_kernel(top_pmd, va); 2960db4fcfSRussell King return *ptep; 300d31fe47SRussell King } 310d31fe47SRussell King 321b2e2b73SRussell King static inline pmd_t *pmd_off_k(unsigned long virt) 331b2e2b73SRussell King { 34cc780af5SRussell King return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt); 351b2e2b73SRussell King } 361b2e2b73SRussell King 37b29e9f5eSRussell King struct mem_type { 38f6e3354dSRussell King pteval_t prot_pte; 39442e70c0SCatalin Marinas pmdval_t prot_l1; 40442e70c0SCatalin Marinas pmdval_t prot_sect; 41b29e9f5eSRussell King unsigned int domain; 42b29e9f5eSRussell King }; 43b29e9f5eSRussell King 44b29e9f5eSRussell King const struct mem_type *get_mem_type(unsigned int type); 45b29e9f5eSRussell King 467b0a1003SRussell King extern void __flush_dcache_page(struct address_space *mapping, struct page *page); 477b0a1003SRussell King 48576d2f25SNicolas Pitre /* 49576d2f25SNicolas Pitre * ARM specific vm_struct->flags bits. 50576d2f25SNicolas Pitre */ 51576d2f25SNicolas Pitre 52576d2f25SNicolas Pitre /* (super)section-mapped I/O regions used by ioremap()/iounmap() */ 53576d2f25SNicolas Pitre #define VM_ARM_SECTION_MAPPING 0x80000000 54576d2f25SNicolas Pitre 55576d2f25SNicolas Pitre /* permanent static mappings from iotable_init() */ 56576d2f25SNicolas Pitre #define VM_ARM_STATIC_MAPPING 0x40000000 57576d2f25SNicolas Pitre 58576d2f25SNicolas Pitre /* mapping type (attributes) for permanent static mappings */ 59576d2f25SNicolas Pitre #define VM_ARM_MTYPE(mt) ((mt) << 20) 60576d2f25SNicolas Pitre #define VM_ARM_MTYPE_MASK (0x1f << 20) 61576d2f25SNicolas Pitre 62e9da6e99SMarek Szyprowski /* consistent regions used by dma_alloc_attrs() */ 63e9da6e99SMarek Szyprowski #define VM_ARM_DMA_CONSISTENT 0x20000000 64e9da6e99SMarek Szyprowski 653ff1559eSRussell King #endif 663ff1559eSRussell King 67022ae537SRussell King #ifdef CONFIG_ZONE_DMA 684986e5c7SMarek Szyprowski extern phys_addr_t arm_dma_limit; 69022ae537SRussell King #else 7009b2ad13SRussell King #define arm_dma_limit ((phys_addr_t)~0) 71022ae537SRussell King #endif 72022ae537SRussell King 73c7909509SMarek Szyprowski extern phys_addr_t arm_lowmem_limit; 74c7909509SMarek Szyprowski 758d717a52SRussell King void __init bootmem_init(void); 762778f620SRussell King void arm_mm_memblock_reserve(void); 77c7909509SMarek Szyprowski void dma_contiguous_remap(void); 78