forked from Minki/linux
b0e86f0a3b
- Move alignment to page size of init data outside ifdef for BLK_DEV_INITRD. The reservation up to page size of memory after init data was previously not done if BLK_DEV_INITRD was undefined. This caused a kernel oops when init memory pages were freed after startup, data placed in the same page as the last init memory would also be freed and reused, with disastrous results. - Use macros for initcalls and .text sections. - Replace hardcoded page size constant with PAGE_SIZE define. - Change include/asm-cris/page.h to use the _AC macro to instead of testing __ASSEMBLY__. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Mikael Starvik <mikael.starvik@axis.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
#ifndef _CRIS_PAGE_H
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#define _CRIS_PAGE_H
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#ifdef __KERNEL__
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#include <asm/arch/page.h>
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#include <linux/const.h>
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/* PAGE_SHIFT determines the page size */
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#define PAGE_SHIFT 13
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#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
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#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
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#define clear_user_page(page, vaddr, pg) clear_page(page)
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#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
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#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
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alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
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#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
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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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#ifndef __ASSEMBLY__
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typedef struct { unsigned long pte; } pte_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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#endif
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#define pte_val(x) ((x).pte)
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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 __pgd(x) ((pgd_t) { (x) } )
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#define __pgprot(x) ((pgprot_t) { (x) } )
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/* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */
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/* for that before indexing into the page table starting at mem_map */
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#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
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#define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr)
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/* to index into the page map. our pages all start at physical addr PAGE_OFFSET so
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* we can let the map start there. notice that we subtract PAGE_OFFSET because
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* we start our mem_map there - in other ports they map mem_map physically and
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* use __pa instead. in our system both the physical and virtual address of DRAM
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* is too high to let mem_map start at 0, so we do it this way instead (similar
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* to arm and m68k I think)
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*/
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#define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT))
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#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
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#define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT)
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/* convert a page (based on mem_map and forward) to a physical address
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* do this by figuring out the virtual address and then use __pa
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*/
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#define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
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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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#ifndef __ASSEMBLY__
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#endif /* __ASSEMBLY__ */
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#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#include <asm-generic/memory_model.h>
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#include <asm-generic/page.h>
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#endif /* __KERNEL__ */
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#endif /* _CRIS_PAGE_H */
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