linux/arch/arm/mm/mm.h

#ifdef CONFIG_MMU

/* the upper-most page table pointer */
extern pmd_t *top_pmd;

#define TOP_PTE(x)	pte_offset_kernel(top_pmd, x)

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;
	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);

#endif

#ifdef CONFIG_ZONE_DMA
extern u32 arm_dma_limit;
#else
#define arm_dma_limit ((u32)~0)
#endif

void __init bootmem_init(void);
void arm_mm_memblock_reserve(void);
[ARM] Fix nommu build Fix warnings and errors in arch/arm/mm for nommu build. Remove commented out function prototype in pgtable-nommu.h Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2006-11-30 21:53:54 +08:00			`#ifdef CONFIG_MMU`

[ARM] fixmap support This is the minimum fixmap interface expected to be implemented by architectures supporting highmem. We have a second level page table already allocated and covering 0xfff00000-0xffffffff because the exception vector page is located at 0xffff0000, and various cache tricks already use some entries above 0xffff0000. Therefore the PTEs covering 0xfff00000-0xfffeffff are free to be used. However the XScale cache flushing code already uses virtual addresses between 0xfffe0000 and 0xfffeffff. So this reserves the 0xfff00000-0xfffdffff range for fixmap stuff. The Documentation/arm/memory.txt information is updated accordingly, including the information about the actual top of DMA memory mapping region which didn't match the code. Signed-off-by: Nicolas Pitre <nico@marvell.com> 2008-09-17 01:05:53 +08:00			`/* the upper-most page table pointer */`
[ARM] Cleanup arch/arm/mm a little Move top_pmd into arch/arm/mm/mm.h - nothing outside arch/arm/mm references it. Move the repeated definition of TOP_PTE into mm/mm.h, as well as a few function prototypes. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2006-08-22 00:06:38 +08:00			`extern pmd_t *top_pmd;`

			`#define TOP_PTE(x) pte_offset_kernel(top_pmd, x)`

			`static inline pmd_t *pmd_off_k(unsigned long virt)`
			`{`
ARM: kill pmd_off() pmd_off() has only one user, so lets consolidate this into its only user. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-05-27 02:50:30 +08:00			`return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);`
[ARM] Cleanup arch/arm/mm a little Move top_pmd into arch/arm/mm/mm.h - nothing outside arch/arm/mm references it. Move the repeated definition of TOP_PTE into mm/mm.h, as well as a few function prototypes. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2006-08-22 00:06:38 +08:00			`}`

[ARM] mm 5: Use mem_types table in ioremap We really want to be using the memory type table in ioremap, so we only have to do the CPU type fixups in one place. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2007-04-21 17:47:29 +08:00			`struct mem_type {`
ARM: pgtable: introduce pteval_t to represent a pte value This makes everywhere dealing with pte values use the same type. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2010-11-16 08:22:09 +08:00			`pteval_t prot_pte;`
ARM: 7076/1: LPAE: Add (pte\|pmd)val_t type definitions as u32 This patch defines the (pte\|pmd)val_t as u32 and changes the page table types to be based on these. The PMD bits are converted to the corresponding type using the _AT macro. The flush_pmd_entry/clean_pmd_entry argument was changed to (void *) to allow them to be used with both PGD and PMD pointers and avoid code duplication. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-09-06 00:51:56 +08:00			`pmdval_t prot_l1;`
			`pmdval_t prot_sect;`
[ARM] mm 5: Use mem_types table in ioremap We really want to be using the memory type table in ioremap, so we only have to do the CPU type fixups in one place. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2007-04-21 17:47:29 +08:00			`unsigned int domain;`
			`};`

			`const struct mem_type *get_mem_type(unsigned int type);`

ARM: Reduce __flush_dcache_page() visibility Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2009-10-24 21:11:59 +08:00			`extern void __flush_dcache_page(struct address_space mapping, struct page page);`

[ARM] Fix nommu build Fix warnings and errors in arch/arm/mm for nommu build. Remove commented out function prototype in pgtable-nommu.h Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2006-11-30 21:53:54 +08:00			`#endif`

ARM: dma: replace ISA_DMA_THRESHOLD with a variable ISA_DMA_THRESHOLD has been unused by non-arch code, so lets now get rid of it from ARM by replacing it with arm_dma_zone_mask. Move dma_supported() and dma_set_mask() out of line, and have dma_supported() check this new variable instead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-07-09 04:26:59 +08:00			`#ifdef CONFIG_ZONE_DMA`
			`extern u32 arm_dma_limit;`
			`#else`
			`#define arm_dma_limit ((u32)~0)`
			`#endif`

ARM: Convert platform reservations to use LMB rather than bootmem Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2010-05-23 02:47:18 +08:00			`void __init bootmem_init(void);`
ARM: initial LMB trial Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2010-07-09 23:27:52 +08:00			`void arm_mm_memblock_reserve(void);`