diff options
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-m32r/page.h |
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-m32r/page.h')
-rw-r--r-- | include/asm-m32r/page.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/include/asm-m32r/page.h b/include/asm-m32r/page.h new file mode 100644 index 00000000000..1c6abb9f3f1 --- /dev/null +++ b/include/asm-m32r/page.h @@ -0,0 +1,115 @@ +#ifndef _ASM_M32R_PAGE_H +#define _ASM_M32R_PAGE_H + +#include <linux/config.h> + +/* PAGE_SHIFT determines the page size */ +#define PAGE_SHIFT 12 +#define PAGE_SIZE (1UL << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE-1)) + +#ifdef __KERNEL__ +#ifndef __ASSEMBLY__ + +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) + +#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.. + */ +typedef struct { unsigned long pte; } pte_t; +typedef struct { unsigned long pmd; } pmd_t; +typedef struct { unsigned long pgd; } pgd_t; +#define pte_val(x) ((x).pte) +#define PTE_MASK PAGE_MASK + +typedef struct { unsigned long pgprot; } pgprot_t; + +#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) } ) + +#endif /* !__ASSEMBLY__ */ + +/* to align the pointer to the (next) page boundary */ +#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) + +/* + * This handles the memory map.. We could make this a config + * option, but too many people screw it up, and too few need + * it. + * + * A __PAGE_OFFSET of 0xC0000000 means that the kernel has + * a virtual address space of one gigabyte, which limits the + * amount of physical memory you can use to about 950MB. + * + * If you want more physical memory than this then see the CONFIG_HIGHMEM4G + * and CONFIG_HIGHMEM64G options in the kernel configuration. + */ + + +/* This handles the memory map.. */ + +#ifndef __ASSEMBLY__ + +/* 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 __MEMORY_START CONFIG_MEMORY_START +#define __MEMORY_SIZE CONFIG_MEMORY_SIZE + +#ifdef CONFIG_MMU +#define __PAGE_OFFSET (0x80000000) +#else +#define __PAGE_OFFSET (0x00000000) +#endif + +#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) +#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) +#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) + +#ifndef CONFIG_DISCONTIGMEM +#define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT) +#define pfn_to_page(pfn) (mem_map + ((pfn) - PFN_BASE)) +#define page_to_pfn(page) \ + ((unsigned long)((page) - mem_map) + PFN_BASE) +#define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr) +#endif /* !CONFIG_DISCONTIGMEM */ + +#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) +#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) + +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC ) + +#define devmem_is_allowed(x) 1 + +#endif /* __KERNEL__ */ + +#endif /* _ASM_M32R_PAGE_H */ + |