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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-v850/page.h | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
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-v850/page.h')
-rw-r--r-- | include/asm-v850/page.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/include/asm-v850/page.h b/include/asm-v850/page.h new file mode 100644 index 0000000..06085b0 --- /dev/null +++ b/include/asm-v850/page.h @@ -0,0 +1,146 @@ +/* + * include/asm-v850/page.h -- VM ops + * + * Copyright (C) 2001,02,03 NEC Electronics Corporation + * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org> + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + * Written by Miles Bader <miles@gnu.org> + */ + +#ifndef __V850_PAGE_H__ +#define __V850_PAGE_H__ + +#include <asm/machdep.h> + + +#define PAGE_SHIFT 12 +#define PAGE_SIZE (1UL << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE-1)) + + +/* + * PAGE_OFFSET -- the first address of the first page of memory. For archs with + * no MMU this corresponds to the first free page in physical memory (aligned + * on a page boundary). + */ +#ifndef PAGE_OFFSET +#define PAGE_OFFSET 0x0000000 +#endif + + +#ifdef __KERNEL__ +#ifndef __ASSEMBLY__ + +#define STRICT_MM_TYPECHECKS + +#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(addr, vaddr, page) \ + do { clear_page(addr); \ + flush_dcache_page(page); \ + } while (0) +#define copy_user_page(to, from, vaddr, page) \ + do { copy_page(to, from); \ + flush_dcache_page(page); \ + } while (0) + +#ifdef STRICT_MM_TYPECHECKS +/* + * 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; +typedef struct { unsigned long pgprot; } pgprot_t; + +#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) } ) + +#else /* !STRICT_MM_TYPECHECKS */ +/* + * .. while these make it easier on the compiler + */ + +typedef unsigned long pte_t; +typedef unsigned long pmd_t; +typedef unsigned long pgd_t; +typedef unsigned long pgprot_t; + +#define pte_val(x) (x) +#define pmd_val(x) (x) +#define pgd_val(x) (x) +#define pgprot_val(x) (x) + +#define __pte(x) (x) +#define __pmd(x) (x) +#define __pgd(x) (x) +#define __pgprot(x) (x) + +#endif /* STRICT_MM_TYPECHECKS */ + +#endif /* !__ASSEMBLY__ */ + + +/* to align the pointer to the (next) page boundary */ +#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) + + +#ifndef __ASSEMBLY__ + +/* Pure 2^n version of get_order */ +extern __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__ */ + + +/* No current v850 processor has virtual memory. */ +#define __virt_to_phys(addr) (addr) +#define __phys_to_virt(addr) (addr) + +#define virt_to_pfn(kaddr) (__virt_to_phys (kaddr) >> PAGE_SHIFT) +#define pfn_to_virt(pfn) __phys_to_virt ((pfn) << PAGE_SHIFT) + +#define MAP_NR(kaddr) \ + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) +#define virt_to_page(kaddr) (mem_map + MAP_NR (kaddr)) +#define page_to_virt(page) \ + ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) + +#define pfn_to_page(pfn) virt_to_page (pfn_to_virt (pfn)) +#define page_to_pfn(page) virt_to_pfn (page_to_virt (page)) + +#define virt_addr_valid(kaddr) \ + (((void *)(kaddr) >= (void *)PAGE_OFFSET) && MAP_NR (kaddr) < max_mapnr) + + +#define __pa(x) __virt_to_phys ((unsigned long)(x)) +#define __va(x) ((void *)__phys_to_virt ((unsigned long)(x))) + + +#endif /* KERNEL */ + +#endif /* __V850_PAGE_H__ */ |