[deliverable/linux.git] / arch / arm / mm / mm.h

#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;

/*
 * 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)
{
	return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
}

struct mem_type {
	pteval_t prot_pte;
	pteval_t prot_pte_s2;
	pmdval_t prot_l1;
	pmdval_t prot_sect;
	unsigned int domain;
};

const struct mem_type *get_mem_type(unsigned int type);

extern void __flush_dcache_page(struct address_space *mapping, struct page *page);

/*
 * ARM specific vm_struct->flags bits.
 */

/* (super)section-mapped I/O regions used by ioremap()/iounmap() */
#define VM_ARM_SECTION_MAPPING	0x80000000

/* 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 phys_addr_t arm_dma_limit;
extern unsigned long arm_dma_pfn_limit;
#else
#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);
Commit	Line	Data
	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);