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[/] [or1k/] [tags/] [LINUX_2_4_26_OR32/] [linux/] [linux-2.4/] [include/] [asm-ppc/] [page.h] - Rev 1765
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#ifndef _PPC_PAGE_H #define _PPC_PAGE_H /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT 12 #define PAGE_SIZE (1UL << 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__ #include <linux/config.h> #define PAGE_OFFSET CONFIG_KERNEL_START #define KERNELBASE 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_64BIT typedef unsigned long long pte_basic_t; #define PTE_SHIFT (PAGE_SHIFT - 3) /* 512 ptes per page */ #define PTE_FMT "%16Lx" #else typedef unsigned long pte_basic_t; #define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */ #define PTE_FMT "%.8lx" #endif #include <asm/system.h> /* for xmon definition */ #ifdef CONFIG_XMON #define BUG() do { \ printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ xmon(0); \ } while (0) #else #define BUG() do { \ printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ __asm__ __volatile__(".long 0x0"); \ } while (0) #endif #define PAGE_BUG(page) do { BUG(); } while (0) #define 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 unsigned long 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 /* align addr on a size boundry - adjust address up if needed -- Cort */ #define _ALIGN(addr,size) (((addr)+(size)-1)&(~((size)-1))) /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) extern void clear_page(void *page); extern void copy_page(void *to, void *from); extern void clear_user_page(void *page, unsigned long vaddr); extern void copy_user_page(void *to, void *from, unsigned long vaddr); extern unsigned long ppc_memstart; extern unsigned long ppc_memoffset; #ifndef CONFIG_APUS #define PPC_MEMSTART 0 #define PPC_MEMOFFSET PAGE_OFFSET #else #define PPC_MEMSTART ppc_memstart #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 #define __pa(x) ___pa((unsigned long)(x)) #define __va(x) ((void *)(___va((unsigned long)(x)))) #define MAP_PAGE_RESERVED (1<<15) #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr)-PAGE_OFFSET) >> PAGE_SHIFT)) #define VALID_PAGE(page) (((page) - mem_map) < max_mapnr) extern unsigned long get_zero_page_fast(void); /* Pure 2^n version of get_order */ extern __inline__ int get_order(unsigned long size) { int order; size = (size-1) >> (PAGE_SHIFT-1); order = -1; do { size >>= 1; order++; } while (size); return order; } #endif /* __ASSEMBLY__ */ #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #endif /* __KERNEL__ */ #endif /* _PPC_PAGE_H */