175 lines
4.9 KiB
C
175 lines
4.9 KiB
C
/* $Id: page.h,v 1.39 2002/02/09 19:49:31 davem Exp $ */
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#ifndef _SPARC64_PAGE_H
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#define _SPARC64_PAGE_H
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#include <linux/config.h>
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#include <asm/const.h>
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#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
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#define PAGE_SHIFT 13
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#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
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#define PAGE_SHIFT 16
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#elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
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#define PAGE_SHIFT 19
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#elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
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#define PAGE_SHIFT 22
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#else
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#error No page size specified in kernel configuration
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#endif
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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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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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extern void _clear_page(void *page);
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#define clear_page(X) _clear_page((void *)(X))
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struct page;
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extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
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#define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
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extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
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/* Unlike sparc32, sparc64's parameter passing API is more
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* sane in that structures which as small enough are passed
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* in registers instead of on the stack. Thus, setting
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* STRICT_MM_TYPECHECKS does not generate worse code so
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* let's enable it to get the type checking.
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*/
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#define STRICT_MM_TYPECHECKS
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#ifdef STRICT_MM_TYPECHECKS
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/* These are used to make use of C type-checking.. */
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long iopte; } iopte_t;
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typedef struct { unsigned int pmd; } pmd_t;
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typedef struct { unsigned int 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 iopte_val(x) ((x).iopte)
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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 __iopte(x) ((iopte_t) { (x) } )
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#define __pmd(x) ((pmd_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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#else
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/* .. while these make it easier on the compiler */
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typedef unsigned long pte_t;
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typedef unsigned long iopte_t;
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typedef unsigned int pmd_t;
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typedef unsigned int pgd_t;
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typedef unsigned long pgprot_t;
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#define pte_val(x) (x)
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#define iopte_val(x) (x)
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#define pmd_val(x) (x)
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#define pgd_val(x) (x)
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#define pgprot_val(x) (x)
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#define __pte(x) (x)
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#define __iopte(x) (x)
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#define __pmd(x) (x)
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#define __pgd(x) (x)
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#define __pgprot(x) (x)
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#endif /* (STRICT_MM_TYPECHECKS) */
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#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
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#define HPAGE_SHIFT 22
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
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#define HPAGE_SHIFT 19
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
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#define HPAGE_SHIFT 16
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#endif
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#ifdef CONFIG_HUGETLB_PAGE
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#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
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#define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
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#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
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#define ARCH_HAS_SETCLEAR_HUGE_PTE
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#define ARCH_HAS_HUGETLB_PREFAULT_HOOK
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#endif
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#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
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(_AC(0x0000000070000000,UL)) : (PAGE_OFFSET))
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#endif /* !(__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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/* We used to stick this into a hard-coded global register (%g4)
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* but that does not make sense anymore.
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*/
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#define PAGE_OFFSET _AC(0xFFFFF80000000000,UL)
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#ifndef __ASSEMBLY__
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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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/* PFNs are real physical page numbers. However, mem_map only begins to record
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* per-page information starting at pfn_base. This is to handle systems where
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* the first physical page in the machine is at some huge physical address,
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* such as 4GB. This is common on a partitioned E10000, for example.
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*/
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extern struct page *pfn_to_page(unsigned long pfn);
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extern unsigned long page_to_pfn(struct page *);
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
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#define pfn_valid(pfn) (((pfn)-(pfn_base)) < max_mapnr)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#define virt_to_phys __pa
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#define phys_to_virt __va
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/* The following structure is used to hold the physical
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* memory configuration of the machine. This is filled in
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* probe_memory() and is later used by mem_init() to set up
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* mem_map[]. We statically allocate SPARC_PHYS_BANKS of
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* these structs, this is arbitrary. The entry after the
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* last valid one has num_bytes==0.
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*/
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struct sparc_phys_banks {
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unsigned long base_addr;
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unsigned long num_bytes;
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};
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#define SPARC_PHYS_BANKS 32
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extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
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/* Pure 2^n version of get_order */
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static __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 /* !(__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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#endif /* !(__KERNEL__) */
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#endif /* !(_SPARC64_PAGE_H) */
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