diff options
Diffstat (limited to 'arch/metag/include/asm/page.h')
| -rw-r--r-- | arch/metag/include/asm/page.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/arch/metag/include/asm/page.h b/arch/metag/include/asm/page.h new file mode 100644 index 000000000000..1e8e281b8bb7 --- /dev/null +++ b/arch/metag/include/asm/page.h @@ -0,0 +1,128 @@ +#ifndef _METAG_PAGE_H +#define _METAG_PAGE_H + +#include <linux/const.h> + +#include <asm/metag_mem.h> + +/* PAGE_SHIFT determines the page size */ +#if defined(CONFIG_PAGE_SIZE_4K) +#define PAGE_SHIFT 12 +#elif defined(CONFIG_PAGE_SIZE_8K) +#define PAGE_SHIFT 13 +#elif defined(CONFIG_PAGE_SIZE_16K) +#define PAGE_SHIFT 14 +#endif + +#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE-1)) + +#if defined(CONFIG_HUGETLB_PAGE_SIZE_8K) +# define HPAGE_SHIFT 13 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_16K) +# define HPAGE_SHIFT 14 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_32K) +# define HPAGE_SHIFT 15 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) +# define HPAGE_SHIFT 16 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_128K) +# define HPAGE_SHIFT 17 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K) +# define HPAGE_SHIFT 18 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) +# define HPAGE_SHIFT 19 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1M) +# define HPAGE_SHIFT 20 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_2M) +# define HPAGE_SHIFT 21 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4M) +# define HPAGE_SHIFT 22 +#endif + +#ifdef CONFIG_HUGETLB_PAGE +# define HPAGE_SIZE (1UL << HPAGE_SHIFT) +# define HPAGE_MASK (~(HPAGE_SIZE-1)) +# define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT) +/* + * We define our own hugetlb_get_unmapped_area so we don't corrupt 2nd level + * page tables with normal pages in them. + */ +# define HUGEPT_SHIFT (22) +# define HUGEPT_ALIGN (1 << HUGEPT_SHIFT) +# define HUGEPT_MASK (HUGEPT_ALIGN - 1) +# define ALIGN_HUGEPT(x) ALIGN(x, HUGEPT_ALIGN) +# define HAVE_ARCH_HUGETLB_UNMAPPED_AREA +#endif + +#ifndef __ASSEMBLY__ + +/* On the Meta, we would like to know if the address (heap) we have is + * in local or global space. + */ +#define is_global_space(addr) ((addr) > 0x7fffffff) +#define is_local_space(addr) (!is_global_space(addr)) + +extern void clear_page(void *to); +extern void copy_page(void *to, void *from); + +#define clear_user_page(page, vaddr, pg) clear_page(page) +#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) + +/* + * These are used to make use of C type-checking.. + */ +typedef struct { unsigned long pte; } pte_t; +typedef struct { unsigned long pgd; } pgd_t; +typedef struct { unsigned long pgprot; } pgprot_t; +typedef struct page *pgtable_t; + +#define pte_val(x) ((x).pte) +#define pgd_val(x) ((x).pgd) +#define pgprot_val(x) ((x).pgprot) + +#define __pte(x) ((pte_t) { (x) }) +#define __pgd(x) ((pgd_t) { (x) }) +#define __pgprot(x) ((pgprot_t) { (x) }) + +/* The kernel must now ALWAYS live at either 0xC0000000 or 0x40000000 - that + * being either global or local space. + */ +#define PAGE_OFFSET (CONFIG_PAGE_OFFSET) + +#if PAGE_OFFSET >= LINGLOBAL_BASE +#define META_MEMORY_BASE LINGLOBAL_BASE +#define META_MEMORY_LIMIT LINGLOBAL_LIMIT +#else +#define META_MEMORY_BASE LINLOCAL_BASE +#define META_MEMORY_LIMIT LINLOCAL_LIMIT +#endif + +/* Offset between physical and virtual mapping of kernel memory. */ +extern unsigned int meta_memoffset; + +#define __pa(x) ((unsigned long)(((unsigned long)(x)) - meta_memoffset)) +#define __va(x) ((void *)((unsigned long)(((unsigned long)(x)) + meta_memoffset))) + +extern unsigned long pfn_base; +#define ARCH_PFN_OFFSET (pfn_base) +#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) +#define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT) +#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) +#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) +#ifdef CONFIG_FLATMEM +extern unsigned long max_pfn; +extern unsigned long min_low_pfn; +#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_pfn) +#endif + +#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) + +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#include <asm-generic/memory_model.h> +#include <asm-generic/getorder.h> + +#endif /* __ASSMEBLY__ */ + +#endif /* _METAG_PAGE_H */ |