diff options
Diffstat (limited to 'arch/arm/mm/mm.h')
| -rw-r--r-- | arch/arm/mm/mm.h | 58 |
1 files changed, 55 insertions, 3 deletions
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h index 70f6d3ea483..ce727d47275 100644 --- a/arch/arm/mm/mm.h +++ b/arch/arm/mm/mm.h @@ -1,9 +1,37 @@ #ifdef CONFIG_MMU +#include <linux/list.h> +#include <linux/vmalloc.h> + +#include <asm/pgtable.h> /* the upper-most page table pointer */ extern pmd_t *top_pmd; -#define TOP_PTE(x) pte_offset_kernel(top_pmd, x) +/* + * 0xffff8000 to 0xffffffff is reserved for any ARM architecture + * specific hacks for copying pages efficiently, while 0xffff4000 + * is reserved for VIPT aliasing flushing by generic code. + * + * Note that we don't allow VIPT aliasing caches with SMP. + */ +#define COPYPAGE_MINICACHE 0xffff8000 +#define COPYPAGE_V6_FROM 0xffff8000 +#define COPYPAGE_V6_TO 0xffffc000 +/* PFN alias flushing, for VIPT caches */ +#define FLUSH_ALIAS_START 0xffff4000 + +static inline void set_top_pte(unsigned long va, pte_t pte) +{ + pte_t *ptep = pte_offset_kernel(top_pmd, va); + set_pte_ext(ptep, pte, 0); + local_flush_tlb_kernel_page(va); +} + +static inline pte_t get_top_pte(unsigned long va) +{ + pte_t *ptep = pte_offset_kernel(top_pmd, va); + return *ptep; +} static inline pmd_t *pmd_off_k(unsigned long virt) { @@ -12,6 +40,7 @@ static inline pmd_t *pmd_off_k(unsigned long virt) struct mem_type { pteval_t prot_pte; + pteval_t prot_pte_s2; pmdval_t prot_l1; pmdval_t prot_sect; unsigned int domain; @@ -31,17 +60,40 @@ extern void __flush_dcache_page(struct address_space *mapping, struct page *page /* permanent static mappings from iotable_init() */ #define VM_ARM_STATIC_MAPPING 0x40000000 +/* empty mapping */ +#define VM_ARM_EMPTY_MAPPING 0x20000000 + /* mapping type (attributes) for permanent static mappings */ #define VM_ARM_MTYPE(mt) ((mt) << 20) #define VM_ARM_MTYPE_MASK (0x1f << 20) +/* consistent regions used by dma_alloc_attrs() */ +#define VM_ARM_DMA_CONSISTENT 0x20000000 + + +struct static_vm { + struct vm_struct vm; + struct list_head list; +}; + +extern struct list_head static_vmlist; +extern struct static_vm *find_static_vm_vaddr(void *vaddr); +extern __init void add_static_vm_early(struct static_vm *svm); + #endif #ifdef CONFIG_ZONE_DMA -extern u32 arm_dma_limit; +extern phys_addr_t arm_dma_limit; +extern unsigned long arm_dma_pfn_limit; #else -#define arm_dma_limit ((u32)~0) +#define arm_dma_limit ((phys_addr_t)~0) +#define arm_dma_pfn_limit (~0ul >> PAGE_SHIFT) #endif +extern phys_addr_t arm_lowmem_limit; + void __init bootmem_init(void); void arm_mm_memblock_reserve(void); +void dma_contiguous_remap(void); + +unsigned long __clear_cr(unsigned long mask); |