88 lines
2.4 KiB
C
Executable File
88 lines
2.4 KiB
C
Executable File
/* $Id: //BBN_Linux/Branch/Branch_for_Rel_TP_ASEAN_20161216/tclinux_phoenix/bootrom/bootram/include/asm/page.h#1 $
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*
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* Definitions for page handling
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1994 - 1999 by Ralf Baechle
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*/
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#ifndef __ASM_PAGE_H
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#define __ASM_PAGE_H
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/* PAGE_SHIFT determines the page size */
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#define PAGE_SHIFT 12
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#define PAGE_SIZE (1UL << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#ifdef __KERNEL__
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#ifndef _LANGUAGE_ASSEMBLY
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#define BUG() do { printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); *(int *)0=0; } while (0)
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#define PAGE_BUG(page) do { BUG(); } while (0)
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extern void (*_clear_page)(void * page);
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extern void (*_copy_page)(void * to, void * from);
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#define clear_page(page) _clear_page(page)
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#define copy_page(to, from) _copy_page(to, from)
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#define clear_user_page(page, vaddr) clear_page(page)
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#define copy_user_page(to, from, vaddr) copy_page(to, from)
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/*
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* These are used to make use of C type-checking..
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*/
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long pmd; } pmd_t;
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typedef struct { unsigned long pgd; } pgd_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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#define pte_val(x) ((x).pte)
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#define pmd_val(x) ((x).pmd)
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#define pgd_val(x) ((x).pgd)
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#define pgprot_val(x) ((x).pgprot)
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#define __pte(x) ((pte_t) { (x) } )
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#define __pme(x) ((pme_t) { (x) } )
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#define __pgd(x) ((pgd_t) { (x) } )
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#define __pgprot(x) ((pgprot_t) { (x) } )
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/* Pure 2^n version of get_order */
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extern __inline__ int get_order(unsigned long size)
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{
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int order;
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size = (size-1) >> (PAGE_SHIFT-1);
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order = -1;
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do {
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size >>= 1;
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order++;
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} while (size);
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return order;
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}
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#endif /* _LANGUAGE_ASSEMBLY */
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/* to align the pointer to the (next) page boundary */
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#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
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/*
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* This handles the memory map.
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* We handle pages at KSEG0 for kernels with 32 bit address space.
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*/
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#define PAGE_OFFSET 0x80000000UL
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#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
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#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
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#define virt_to_page(kaddr) (mem_map + (__pa(kaddr) >> PAGE_SHIFT))
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#define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
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#define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT) //lobo add
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#endif /* defined (__KERNEL__) */
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#endif /* __ASM_PAGE_H */
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