/* $Id: page.h,v 1.43 1998/05/11 08:40:11 davem Exp $ * page.h: Various defines and such for MMU operations on the Sparc for * the Linux kernel. * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) */ #ifndef _SPARC_PAGE_H #define _SPARC_PAGE_H #include #ifdef CONFIG_SUN4 #define PAGE_SHIFT 13 #else #define PAGE_SHIFT 12 #endif #define PAGE_SIZE (1 << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #ifdef __KERNEL__ #include #include /* for KERNBASE */ #include /* This is always 2048*sizeof(long), doesn't change with PAGE_SIZE */ #define TASK_UNION_SIZE 8192 #ifndef __ASSEMBLY__ #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) extern unsigned long page_offset; BTFIXUPDEF_SETHI_INIT(page_offset,0xf0000000) #ifdef MODULE #define PAGE_OFFSET (page_offset) #else #define PAGE_OFFSET BTFIXUP_SETHI(page_offset) #endif /* translate between physical and virtual addresses */ BTFIXUPDEF_CALL_CONST(unsigned long, mmu_v2p, unsigned long) BTFIXUPDEF_CALL_CONST(unsigned long, mmu_p2v, unsigned long) #define mmu_v2p(vaddr) BTFIXUP_CALL(mmu_v2p)(vaddr) #define mmu_p2v(paddr) BTFIXUP_CALL(mmu_p2v)(paddr) #define __pa(x) (mmu_v2p((unsigned long)(x))) #define __va(x) ((void *)(mmu_p2v((unsigned long)(x)))) /* The following structure is used to hold the physical * memory configuration of the machine. This is filled in * probe_memory() and is later used by mem_init() to set up * mem_map[]. We statically allocate SPARC_PHYS_BANKS of * these structs, this is arbitrary. The entry after the * last valid one has num_bytes==0. */ struct sparc_phys_banks { unsigned long base_addr; unsigned long num_bytes; }; #define SPARC_PHYS_BANKS 32 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS]; /* Cache alias structure. Entry is valid if context != -1. */ struct cache_palias { unsigned long vaddr; int context; }; extern struct cache_palias *sparc_aliases; /* passing structs on the Sparc slow us down tremendously... */ /* #define STRICT_MM_TYPECHECKS */ #ifdef STRICT_MM_TYPECHECKS /* * These are used to make use of C type-checking.. */ typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long iopte; } iopte_t; typedef struct { unsigned long pmd; } pmd_t; typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long ctxd; } ctxd_t; typedef struct { unsigned long pgprot; } pgprot_t; typedef struct { unsigned long iopgprot; } iopgprot_t; #define pte_val(x) ((x).pte) #define iopte_val(x) ((x).iopte) #define pmd_val(x) ((x).pmd) #define pgd_val(x) ((x).pgd) #define ctxd_val(x) ((x).ctxd) #define pgprot_val(x) ((x).pgprot) #define iopgprot_val(x) ((x).iopgprot) #define __pte(x) ((pte_t) { (x) } ) #define __iopte(x) ((iopte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __ctxd(x) ((ctxd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) #define __iopgprot(x) ((iopgprot_t) { (x) } ) #elif CONFIG_AP1000_DEBUG typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long iopte; } iopte_t; typedef struct { unsigned long pmd; } pmd_t; typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long ctxd; } ctxd_t; typedef struct { unsigned long pgprot; } pgprot_t; typedef struct { unsigned long iopgprot; } iopgprot_t; static inline unsigned long __get_val(unsigned long x) { if ((x & 0xF0000000) == (8<<28)) return x & 0x0FFFFFFF; return x; } static inline unsigned long __set_val(unsigned long x) { if ((x & 0xF0000000) == (0<<28)) return x | 0x80000000; return x; } #define __pte_val(x) ((x).pte) #define __iopte_val(x) ((x).iopte) #define __pmd_val(x) ((x).pmd) #define __pgd_val(x) ((x).pgd) #define __ctxd_val(x) ((x).ctxd) #define __pgprot_val(x) ((x).pgprot) #define __iopgprot_val(x) ((x).iopgprot) #define ___pte(x) ((pte_t) { (x) } ) #define ___iopte(x) ((iopte_t) { (x) } ) #define ___pmd(x) ((pmd_t) { (x) } ) #define ___pgd(x) ((pgd_t) { (x) } ) #define ___ctxd(x) ((ctxd_t) { (x) } ) #define ___pgprot(x) ((pgprot_t) { (x) } ) #define ___iopgprot(x) ((iopgprot_t) { (x) } ) #define pte_val(x) __get_val(__pte_val(x)) #define iopte_val(x) __get_val(__iopte_val(x)) #define pmd_val(x) __get_val(__pmd_val(x)) #define pgd_val(x) __get_val(__pgd_val(x)) #define ctxd_val(x) __get_val(__ctxd_val(x)) #define pgprot_val(x) __get_val(__pgprot_val(x)) #define iopgprot_val(x) __get_val(__iopgprot_val(x)) #define __pte(x) ___pte(__set_val(x)) #define __iopte(x) ___iopte(__set_val(x)) #define __pmd(x) ___pmd(__set_val(x)) #define __pgd(x) ___pgd(__set_val(x)) #define __ctxd(x) ___ctxd(__set_val(x)) #define __pgprot(x) ___pgprot(x) #define __iopgprot(x) ___iopgprot(__set_val(x)) #elif CONFIG_AP1000 typedef unsigned long pte_t; typedef unsigned long iopte_t; typedef unsigned long pmd_t; typedef unsigned long pgd_t; typedef unsigned long ctxd_t; typedef unsigned long pgprot_t; typedef unsigned long iopgprot_t; static inline unsigned long __get_val(unsigned long x) { #if 0 extern void ap_panic(char *fmt,...); if (x && (x & 0xF0000000) == 0) { ap_panic("get_val got 0x%x\n",x); } #endif if ((x & 0xF0000000) == (8<<28)) return x & 0x0FFFFFFF; return x; } static inline unsigned long __set_val(unsigned long x) { #if 0 extern void ap_panic(char *fmt,...); if ((x & 0xF0000000) == (8<<28)) { ap_panic("set_val got 0x%x\n",x); } #endif if ((x & 0xF0000000) == (0<<28)) return x | 0x80000000; return x; } #define __pte_val(x) (x) #define __iopte_val(x) (x) #define __pmd_val(x) (x) #define __pgd_val(x) (x) #define __ctxd_val(x) (x) #define __pgprot_val(x) (x) #define __iopgprot_val(x) (x) #define ___pte(x) ((pte_t) { (x) } ) #define ___iopte(x) ((iopte_t) { (x) } ) #define ___pmd(x) ((pmd_t) { (x) } ) #define ___pgd(x) ((pgd_t) { (x) } ) #define ___ctxd(x) ((ctxd_t) { (x) } ) #define ___pgprot(x) ((pgprot_t) { (x) } ) #define ___iopgprot(x) ((iopgprot_t) { (x) } ) #define pte_val(x) __get_val(__pte_val(x)) #define iopte_val(x) __get_val(__iopte_val(x)) #define pmd_val(x) __get_val(__pmd_val(x)) #define pgd_val(x) __get_val(__pgd_val(x)) #define ctxd_val(x) __get_val(__ctxd_val(x)) #define pgprot_val(x) __get_val(__pgprot_val(x)) #define iopgprot_val(x) __get_val(__iopgprot_val(x)) #define __pte(x) ___pte(__set_val(x)) #define __iopte(x) ___iopte(__set_val(x)) #define __pmd(x) ___pmd(__set_val(x)) #define __pgd(x) ___pgd(__set_val(x)) #define __ctxd(x) ___ctxd(__set_val(x)) #define __pgprot(x) ___pgprot(x) #define __iopgprot(x) ___iopgprot(__set_val(x)) #else /* * .. while these make it easier on the compiler */ typedef unsigned long pte_t; typedef unsigned long iopte_t; typedef unsigned long pmd_t; typedef unsigned long pgd_t; typedef unsigned long ctxd_t; typedef unsigned long pgprot_t; typedef unsigned long iopgprot_t; #define pte_val(x) (x) #define iopte_val(x) (x) #define pmd_val(x) (x) #define pgd_val(x) (x) #define ctxd_val(x) (x) #define pgprot_val(x) (x) #define iopgprot_val(x) (x) #define __pte(x) (x) #define __iopte(x) (x) #define __pmd(x) (x) #define __pgd(x) (x) #define __ctxd(x) (x) #define __pgprot(x) (x) #define __iopgprot(x) (x) #endif extern unsigned long sparc_unmapped_base; BTFIXUPDEF_SETHI(sparc_unmapped_base) #define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base) /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) /* Now, to allow for very large physical memory configurations we * place the page pool both above the kernel and below the kernel. */ #define MAP_NR(addr) ((((unsigned long) (addr)) - PAGE_OFFSET) >> PAGE_SHIFT) #else /* !(__ASSEMBLY__) */ #define __pgprot(x) (x) #endif /* !(__ASSEMBLY__) */ #endif /* __KERNEL__ */ #endif /* _SPARC_PAGE_H */