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- #ifndef _I386_PAGE_H
- #define _I386_PAGE_H
- #ifdef __KERNEL__
- #ifndef __ASSEMBLY__
- /*
- * These are used to make use of C type-checking..
- */
- extern int nx_enabled;
- #endif /* !__ASSEMBLY__ */
- #ifndef __ASSEMBLY__
- struct vm_area_struct;
- /*
- * This much address space is reserved for vmalloc() and iomap()
- * as well as fixmap mappings.
- */
- extern unsigned int __VMALLOC_RESERVE;
- extern int sysctl_legacy_va_layout;
- extern int page_is_ram(unsigned long pagenr);
- #endif /* __ASSEMBLY__ */
- #define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE)
- #define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE)
- #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
- /* __pa_symbol should be used for C visible symbols.
- This seems to be the official gcc blessed way to do such arithmetic. */
- #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x),0))
- #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
- #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
- #ifdef CONFIG_FLATMEM
- #define pfn_valid(pfn) ((pfn) < max_mapnr)
- #endif /* CONFIG_FLATMEM */
- #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
- #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
- #include <asm-generic/memory_model.h>
- #include <asm-generic/page.h>
- #define __HAVE_ARCH_GATE_AREA 1
- #endif /* __KERNEL__ */
- #endif /* _I386_PAGE_H */
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