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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-cris/page.h | |
download | kernel_goldelico_gta04-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip kernel_goldelico_gta04-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel_goldelico_gta04-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-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-cris/page.h')
-rw-r--r-- | include/asm-cris/page.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/include/asm-cris/page.h b/include/asm-cris/page.h new file mode 100644 index 0000000..ddd8915 --- /dev/null +++ b/include/asm-cris/page.h @@ -0,0 +1,105 @@ +#ifndef _CRIS_PAGE_H +#define _CRIS_PAGE_H + +#include <linux/config.h> +#include <asm/arch/page.h> + +/* PAGE_SHIFT determines the page size */ +#define PAGE_SHIFT 13 +#ifndef __ASSEMBLY__ +#define PAGE_SIZE (1UL << PAGE_SHIFT) +#else +#define PAGE_SIZE (1 << PAGE_SHIFT) +#endif +#define PAGE_MASK (~(PAGE_SIZE-1)) + +#ifdef __KERNEL__ + +#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) +#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) + +#define clear_user_page(page, vaddr, pg) clear_page(page) +#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) + +#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) +#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE + +/* + * These are used to make use of C type-checking.. + */ +#ifndef __ASSEMBLY__ +typedef struct { unsigned long pte; } pte_t; +typedef struct { unsigned long pmd; } pmd_t; +typedef struct { unsigned long pgd; } pgd_t; +typedef struct { unsigned long pgprot; } pgprot_t; +#endif + +#define pte_val(x) ((x).pte) +#define pmd_val(x) ((x).pmd) +#define pgd_val(x) ((x).pgd) +#define pgprot_val(x) ((x).pgprot) + +#define __pte(x) ((pte_t) { (x) } ) +#define __pmd(x) ((pmd_t) { (x) } ) +#define __pgd(x) ((pgd_t) { (x) } ) +#define __pgprot(x) ((pgprot_t) { (x) } ) + +/* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */ +/* for that before indexing into the page table starting at mem_map */ +#define pfn_to_page(pfn) (mem_map + ((pfn) - (PAGE_OFFSET >> PAGE_SHIFT))) +#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + (PAGE_OFFSET >> PAGE_SHIFT)) +#define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr) + +/* to index into the page map. our pages all start at physical addr PAGE_OFFSET so + * we can let the map start there. notice that we subtract PAGE_OFFSET because + * we start our mem_map there - in other ports they map mem_map physically and + * use __pa instead. in our system both the physical and virtual address of DRAM + * is too high to let mem_map start at 0, so we do it this way instead (similar + * to arm and m68k I think) + */ + +#define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)) +#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr) +#define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT) + +/* convert a page (based on mem_map and forward) to a physical address + * do this by figuring out the virtual address and then use __pa + */ + +#define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) + +/* to align the pointer to the (next) page boundary */ +#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) + +#ifndef __ASSEMBLY__ + +#define BUG() do { \ + printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ +} while (0) + +#define PAGE_BUG(page) do { \ + BUG(); \ +} while (0) + +/* Pure 2^n version of get_order */ +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; +} +#endif /* __ASSEMBLY__ */ + +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#endif /* __KERNEL__ */ + +#endif /* _CRIS_PAGE_H */ + |