diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-frv/page.h | |
download | lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-frv/page.h')
-rw-r--r-- | include/asm-frv/page.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/include/asm-frv/page.h b/include/asm-frv/page.h new file mode 100644 index 000000000000..f7914f1782b0 --- /dev/null +++ b/include/asm-frv/page.h @@ -0,0 +1,105 @@ +#ifndef _ASM_PAGE_H +#define _ASM_PAGE_H + +#ifdef __KERNEL__ + +#include <linux/config.h> +#include <asm/virtconvert.h> +#include <asm/mem-layout.h> +#include <asm/sections.h> +#include <asm/setup.h> + +#ifndef __ASSEMBLY__ + +#define get_user_page(vaddr) __get_free_page(GFP_KERNEL) +#define free_user_page(page, addr) free_page(addr) + +#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) +#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) + +#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) +#define copy_user_page(vto, vfrom, vaddr, topg) memcpy((vto), (vfrom), PAGE_SIZE) + +/* + * These are used to make use of C type-checking.. + */ +typedef struct { unsigned long pte; } pte_t; +typedef struct { unsigned long ste[64];} pmd_t; +typedef struct { pmd_t pue[1]; } pud_t; +typedef struct { pud_t pge[1]; } pgd_t; +typedef struct { unsigned long pgprot; } pgprot_t; + +#define pte_val(x) ((x).pte) +#define pmd_val(x) ((x).ste[0]) +#define pud_val(x) ((x).pue[0]) +#define pgd_val(x) ((x).pge[0]) +#define pgprot_val(x) ((x).pgprot) + +#define __pte(x) ((pte_t) { (x) } ) +#define __pmd(x) ((pmd_t) { (x) } ) +#define __pud(x) ((pud_t) { (x) } ) +#define __pgd(x) ((pgd_t) { (x) } ) +#define __pgprot(x) ((pgprot_t) { (x) } ) +#define PTE_MASK PAGE_MASK + +/* to align the pointer to the (next) page boundary */ +#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) + +/* Pure 2^n version of get_order */ +static inline int get_order(unsigned long size) __attribute_const__; +static inline int get_order(unsigned long size) +{ + int order; + + size = (size - 1) >> (PAGE_SHIFT - 1); + order = -1; + do { + size >>= 1; + order++; + } while (size); + return order; +} + +#define devmem_is_allowed(pfn) 1 + +#define __pa(vaddr) virt_to_phys((void *) vaddr) +#define __va(paddr) phys_to_virt((unsigned long) paddr) + +#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) + +extern unsigned long max_low_pfn; +extern unsigned long min_low_pfn; +extern unsigned long max_pfn; + +#ifdef CONFIG_MMU +#define pfn_to_page(pfn) (mem_map + (pfn)) +#define page_to_pfn(page) ((unsigned long) ((page) - mem_map)) +#define pfn_valid(pfn) ((pfn) < max_mapnr) + +#else +#define pfn_to_page(pfn) (&mem_map[(pfn) - (PAGE_OFFSET >> PAGE_SHIFT)]) +#define page_to_pfn(page) ((PAGE_OFFSET >> PAGE_SHIFT) + (unsigned long) ((page) - mem_map)) +#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn) + +#endif + +#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) +#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) + + +#ifdef CONFIG_MMU +#define VM_DATA_DEFAULT_FLAGS \ + (VM_READ | VM_WRITE | \ + ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) +#endif + +#endif /* __ASSEMBLY__ */ + +#endif /* __KERNEL__ */ + +#ifdef CONFIG_CONTIGUOUS_PAGE_ALLOC +#define WANT_PAGE_VIRTUAL 1 +#endif + +#endif /* _ASM_PAGE_H */ |