#ifndef _PPC_PAGE_H#define _PPC_PAGE_H #include <asm/asm-compat.h> /* PAGE_SHIFT determines the page size */#define PAGE_SHIFT	12#define PAGE_SIZE	(ASM_CONST(1) << PAGE_SHIFT) /* * Subtle: this is an int (not an unsigned long) and so it * gets extended to 64 bits the way want (i.e. with 1s).  -- paulus */#define PAGE_MASK	(~((1 << PAGE_SHIFT) - 1)) #ifdef __KERNEL__ /* This must match what is in arch/ppc/Makefile */#define PAGE_OFFSET	CONFIG_KERNEL_START#define KERNELBASE	PAGE_OFFSET#define is_kernel_addr(x)	((x) >= PAGE_OFFSET) #ifndef __ASSEMBLY__ /* * The basic type of a PTE - 64 bits for those CPUs with > 32 bit * physical addressing.  For now this just the IBM PPC440. */#ifdef CONFIG_PTE_64BITtypedef unsigned long long pte_basic_t;#define PTE_SHIFT	(PAGE_SHIFT - 3)	/* 512 ptes per page */#define PTE_FMT		"%16Lx"#elsetypedef unsigned long pte_basic_t;#define PTE_SHIFT	(PAGE_SHIFT - 2)	/* 1024 ptes per page */#define PTE_FMT		"%.8lx"#endif /* align addr on a size boundary - adjust address up/down if needed */#define _ALIGN_UP(addr,size)	(((addr)+((size)-1))&(~((size)-1)))#define _ALIGN_DOWN(addr,size)	((addr)&(~((size)-1))) /* align addr on a size boundary - adjust address up if needed */#define _ALIGN(addr,size)     _ALIGN_UP(addr,size) /* to align the pointer to the (next) page boundary */#define PAGE_ALIGN(addr)	_ALIGN(addr, PAGE_SIZE)  #undef STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS/* * These are used to make use of C type-checking.. */typedef struct { pte_basic_t pte; } pte_t;typedef struct { unsigned long pmd; } pmd_t;typedef struct { unsigned long pgd; } pgd_t;typedef struct { unsigned long pgprot; } pgprot_t; #define pte_val(x)	((x).pte)#define pmd_val(x)	((x).pmd)#define pgd_val(x)	((x).pgd)#define pgprot_val(x)	((x).pgprot) #define __pte(x)	((pte_t) { (x) } )#define __pmd(x)	((pmd_t) { (x) } )#define __pgd(x)	((pgd_t) { (x) } )#define __pgprot(x)	((pgprot_t) { (x) } ) #else/* * .. while these make it easier on the compiler */typedef pte_basic_t pte_t;typedef unsigned long pmd_t;typedef unsigned long pgd_t;typedef unsigned long pgprot_t; #define pte_val(x)	(x)#define pmd_val(x)	(x)#define pgd_val(x)	(x)#define pgprot_val(x)	(x) #define __pte(x)	(x)#define __pmd(x)	(x)#define __pgd(x)	(x)#define __pgprot(x)	(x) #endif struct page;extern void clear_pages(void *page, int order);static inline void clear_page(void *page) { clear_pages(page, 0); }extern void copy_page(void *to, void *from);extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);extern void copy_user_page(void *to, void *from, unsigned long vaddr,			   struct page *pg); #ifndef CONFIG_APUS#define PPC_MEMSTART	0#define PPC_PGSTART	0#define PPC_MEMOFFSET	PAGE_OFFSET#elseextern unsigned long ppc_memstart;extern unsigned long ppc_pgstart;extern unsigned long ppc_memoffset;#define PPC_MEMSTART	ppc_memstart#define PPC_PGSTART	ppc_pgstart#define PPC_MEMOFFSET	ppc_memoffset#endif #if defined(CONFIG_APUS) && !defined(MODULE)/* map phys->virtual and virtual->phys for RAM pages */static inline unsigned long ___pa(unsigned long v){	unsigned long p;	asm volatile ("1: addis %0, %1, %2;"		      ".section \".vtop_fixup\",\"aw\";"		      ".align  1;"		      ".long   1b;"		      ".previous;"		      : "=r" (p)		      : "b" (v), "K" (((-PAGE_OFFSET) >> 16) & 0xffff)); 	return p;}static inline void* ___va(unsigned long p){	unsigned long v;	asm volatile ("1: addis %0, %1, %2;"		      ".section \".ptov_fixup\",\"aw\";"		      ".align  1;"		      ".long   1b;"		      ".previous;"		      : "=r" (v)		      : "b" (p), "K" (((PAGE_OFFSET) >> 16) & 0xffff)); 	return (void*) v;}#else#define ___pa(vaddr) ((vaddr)-PPC_MEMOFFSET)#define ___va(paddr) ((paddr)+PPC_MEMOFFSET)#endif extern int page_is_ram(unsigned long pfn); #define __pa(x) ___pa((unsigned long)(x))#define __va(x) ((void *)(___va((unsigned long)(x)))) #define ARCH_PFN_OFFSET		(PPC_PGSTART)#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)#define page_to_virt(page)	__va(page_to_pfn(page) << PAGE_SHIFT) #define pfn_valid(pfn)		(((pfn) - PPC_PGSTART) < max_mapnr)#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT) /* Pure 2^n version of get_order */extern __inline__ int get_order(unsigned long size){	int lz; 	size = (size-1) >> PAGE_SHIFT;	asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size));	return 32 - lz;} #endif /* __ASSEMBLY__ */ #define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) /* We do define AT_SYSINFO_EHDR but don't use the gate mecanism */#define __HAVE_ARCH_GATE_AREA		1 #include <asm-generic/memory_model.h>#endif /* __KERNEL__ */#endif /* _PPC_PAGE_H */