Skip to content
Snippets Groups Projects
Select Git revision
  • 07d17f09691e549fac0101333eebe0161a472b50
  • vme-testing default
  • ci-test
  • master
  • remoteproc
  • am625-sk-ov5640
  • pcal6534-upstreaming
  • lps22df-upstreaming
  • msc-upstreaming
  • imx8mp
  • iio/noa1305
  • vme-next
  • vme-next-4.14-rc4
  • v4.14-rc4
  • v4.14-rc3
  • v4.14-rc2
  • v4.14-rc1
  • v4.13
  • vme-next-4.13-rc7
  • v4.13-rc7
  • v4.13-rc6
  • v4.13-rc5
  • v4.13-rc4
  • v4.13-rc3
  • v4.13-rc2
  • v4.13-rc1
  • v4.12
  • v4.12-rc7
  • v4.12-rc6
  • v4.12-rc5
  • v4.12-rc4
  • v4.12-rc3
32 results

page.h

Blame
  • page.h 6.62 KiB
    /*
     * 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.
     *
     * Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle
     * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
     */
    #ifndef _ASM_PAGE_H
    #define _ASM_PAGE_H
    
    #include <spaces.h>
    #include <linux/const.h>
    #include <linux/kernel.h>
    #include <asm/mipsregs.h>
    
    /*
     * PAGE_SHIFT determines the page size
     */
    #ifdef CONFIG_PAGE_SIZE_4KB
    #define PAGE_SHIFT	12
    #endif
    #ifdef CONFIG_PAGE_SIZE_8KB
    #define PAGE_SHIFT	13
    #endif
    #ifdef CONFIG_PAGE_SIZE_16KB
    #define PAGE_SHIFT	14
    #endif
    #ifdef CONFIG_PAGE_SIZE_32KB
    #define PAGE_SHIFT	15
    #endif
    #ifdef CONFIG_PAGE_SIZE_64KB
    #define PAGE_SHIFT	16
    #endif
    #define PAGE_SIZE	(_AC(1,UL) << PAGE_SHIFT)
    #define PAGE_MASK	(~((1 << PAGE_SHIFT) - 1))
    
    /*
     * This is used for calculating the real page sizes
     * for FTLB or VTLB + FTLB configurations.
     */
    static inline unsigned int page_size_ftlb(unsigned int mmuextdef)
    {
    	switch (mmuextdef) {
    	case MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT:
    		if (PAGE_SIZE == (1 << 30))
    			return 5;
    		if (PAGE_SIZE == (1llu << 32))
    			return 6;
    		if (PAGE_SIZE > (256 << 10))
    			return 7; /* reserved */
    			/* fall through */
    	case MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT:
    		return (PAGE_SHIFT - 10) / 2;
    	default:
    		panic("Invalid FTLB configuration with Conf4_mmuextdef=%d value\n",
    		      mmuextdef >> 14);
    	}
    }
    
    #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
    #define HPAGE_SHIFT	(PAGE_SHIFT + PAGE_SHIFT - 3)
    #define HPAGE_SIZE	(_AC(1,UL) << HPAGE_SHIFT)
    #define HPAGE_MASK	(~(HPAGE_SIZE - 1))
    #define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
    #else /* !CONFIG_MIPS_HUGE_TLB_SUPPORT */
    #define HPAGE_SHIFT	({BUILD_BUG(); 0; })
    #define HPAGE_SIZE	({BUILD_BUG(); 0; })
    #define HPAGE_MASK	({BUILD_BUG(); 0; })
    #define HUGETLB_PAGE_ORDER	({BUILD_BUG(); 0; })
    #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */
    
    #include <linux/pfn.h>
    
    extern void build_clear_page(void);
    extern void build_copy_page(void);
    
    /*
     * It's normally defined only for FLATMEM config but it's
     * used in our early mem init code for all memory models.
     * So always define it.
     */
    #define ARCH_PFN_OFFSET		PFN_UP(PHYS_OFFSET)
    
    extern void clear_page(void * page);
    extern void copy_page(void * to, void * from);
    
    extern unsigned long shm_align_mask;
    
    static inline unsigned long pages_do_alias(unsigned long addr1,
    	unsigned long addr2)
    {
    	return (addr1 ^ addr2) & shm_align_mask;
    }
    
    struct page;
    
    static inline void clear_user_page(void *addr, unsigned long vaddr,
    	struct page *page)
    {
    	extern void (*flush_data_cache_page)(unsigned long addr);
    
    	clear_page(addr);
    	if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
    		flush_data_cache_page((unsigned long)addr);
    }
    
    struct vm_area_struct;
    extern void copy_user_highpage(struct page *to, struct page *from,
    	unsigned long vaddr, struct vm_area_struct *vma);
    
    #define __HAVE_ARCH_COPY_USER_HIGHPAGE
    
    /*
     * These are used to make use of C type-checking..
     */
    #ifdef CONFIG_PHYS_ADDR_T_64BIT
      #ifdef CONFIG_CPU_MIPS32
        typedef struct { unsigned long pte_low, pte_high; } pte_t;
        #define pte_val(x)	  ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
        #define __pte(x)	  ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
      #else
         typedef struct { unsigned long long pte; } pte_t;
         #define pte_val(x) ((x).pte)
         #define __pte(x)	((pte_t) { (x) } )
      #endif
    #else
    typedef struct { unsigned long pte; } pte_t;
    #define pte_val(x)	((x).pte)
    #define __pte(x)	((pte_t) { (x) } )
    #endif
    typedef struct page *pgtable_t;
    
    /*
     * Right now we don't support 4-level pagetables, so all pud-related
     * definitions come from <asm-generic/pgtable-nopud.h>.
     */
    
    /*
     * Finall the top of the hierarchy, the pgd
     */
    typedef struct { unsigned long pgd; } pgd_t;
    #define pgd_val(x)	((x).pgd)
    #define __pgd(x)	((pgd_t) { (x) } )
    
    /*
     * Manipulate page protection bits
     */
    typedef struct { unsigned long pgprot; } pgprot_t;
    #define pgprot_val(x)	((x).pgprot)
    #define __pgprot(x)	((pgprot_t) { (x) } )
    
    /*
     * On R4000-style MMUs where a TLB entry is mapping a adjacent even / odd
     * pair of pages we only have a single global bit per pair of pages.  When
     * writing to the TLB make sure we always have the bit set for both pages
     * or none.  This macro is used to access the `buddy' of the pte we're just
     * working on.
     */
    #define ptep_buddy(x)	((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
    
    /*
     * __pa()/__va() should be used only during mem init.
     */
    #ifdef CONFIG_64BIT
    #define __pa(x)								\
    ({									\
        unsigned long __x = (unsigned long)(x);				\
        __x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x);			\
    })
    #else
    #define __pa(x)								\
        ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
    #endif
    #define __va(x)		((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
    #include <asm/io.h>
    
    /*
     * RELOC_HIDE was originally added by 6007b903dfe5f1d13e0c711ac2894bdd4a61b1ad
     * (lmo) rsp. 8431fd094d625b94d364fe393076ccef88e6ce18 (kernel.org).  The
     * discussion can be found in lkml posting
     * <a2ebde260608230500o3407b108hc03debb9da6e62c@mail.gmail.com> which is
     * archived at http://lists.linuxcoding.com/kernel/2006-q3/msg17360.html
     *
     * It is unclear if the misscompilations mentioned in
     * http://lkml.org/lkml/2010/8/8/138 also affect MIPS so we keep this one
     * until GCC 3.x has been retired before we can apply
     * https://patchwork.linux-mips.org/patch/1541/
     */
    
    #ifndef __pa_symbol
    #define __pa_symbol(x)	__pa(RELOC_HIDE((unsigned long)(x), 0))
    #endif
    
    #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
    
    #ifdef CONFIG_FLATMEM
    
    static inline int pfn_valid(unsigned long pfn)
    {
    	/* avoid <linux/mm.h> include hell */
    	extern unsigned long max_mapnr;
    	unsigned long pfn_offset = ARCH_PFN_OFFSET;
    
    	return pfn >= pfn_offset && pfn < max_mapnr;
    }
    
    #elif defined(CONFIG_SPARSEMEM)
    
    /* pfn_valid is defined in linux/mmzone.h */
    
    #elif defined(CONFIG_NEED_MULTIPLE_NODES)
    
    #define pfn_valid(pfn)							\
    ({									\
    	unsigned long __pfn = (pfn);					\
    	int __n = pfn_to_nid(__pfn);					\
    	((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn +		\
    			       NODE_DATA(__n)->node_spanned_pages)	\
    		    : 0);						\
    })
    
    #endif
    
    #define virt_to_page(kaddr)	pfn_to_page(PFN_DOWN(virt_to_phys((void *)     \
    								  (kaddr))))
    
    extern int __virt_addr_valid(const volatile void *kaddr);
    #define virt_addr_valid(kaddr)						\
    	__virt_addr_valid((const volatile void *) (kaddr))
    
    #define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
    				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
    
    #define UNCAC_ADDR(addr)	((addr) - PAGE_OFFSET + UNCAC_BASE)
    #define CAC_ADDR(addr)		((addr) - UNCAC_BASE + PAGE_OFFSET)
    
    #include <asm-generic/memory_model.h>
    #include <asm-generic/getorder.h>
    
    #endif /* _ASM_PAGE_H */