3 /* the upper-most page table pointer */
7 * 0xffff8000 to 0xffffffff is reserved for any ARM architecture
8 * specific hacks for copying pages efficiently, while 0xffff4000
9 * is reserved for VIPT aliasing flushing by generic code.
11 * Note that we don't allow VIPT aliasing caches with SMP.
13 #define COPYPAGE_MINICACHE 0xffff8000
14 #define COPYPAGE_V6_FROM 0xffff8000
15 #define COPYPAGE_V6_TO 0xffffc000
16 /* PFN alias flushing, for VIPT caches */
17 #define FLUSH_ALIAS_START 0xffff4000
19 static inline void set_top_pte(unsigned long va
, pte_t pte
)
21 pte_t
*ptep
= pte_offset_kernel(top_pmd
, va
);
22 set_pte_ext(ptep
, pte
, 0);
23 local_flush_tlb_kernel_page(va
);
26 static inline pte_t
get_top_pte(unsigned long va
)
28 pte_t
*ptep
= pte_offset_kernel(top_pmd
, va
);
32 static inline pmd_t
*pmd_off_k(unsigned long virt
)
34 return pmd_offset(pud_offset(pgd_offset_k(virt
), virt
), virt
);
44 const struct mem_type
*get_mem_type(unsigned int type
);
46 extern void __flush_dcache_page(struct address_space
*mapping
, struct page
*page
);
49 * ARM specific vm_struct->flags bits.
52 /* (super)section-mapped I/O regions used by ioremap()/iounmap() */
53 #define VM_ARM_SECTION_MAPPING 0x80000000
55 /* permanent static mappings from iotable_init() */
56 #define VM_ARM_STATIC_MAPPING 0x40000000
59 #define VM_ARM_EMPTY_MAPPING 0x20000000
61 /* mapping type (attributes) for permanent static mappings */
62 #define VM_ARM_MTYPE(mt) ((mt) << 20)
63 #define VM_ARM_MTYPE_MASK (0x1f << 20)
65 /* consistent regions used by dma_alloc_attrs() */
66 #define VM_ARM_DMA_CONSISTENT 0x20000000
70 #ifdef CONFIG_ZONE_DMA
71 extern phys_addr_t arm_dma_limit
;
73 #define arm_dma_limit ((phys_addr_t)~0)
76 extern phys_addr_t arm_lowmem_limit
;
78 void __init
bootmem_init(void);
79 void arm_mm_memblock_reserve(void);
80 void dma_contiguous_remap(void);