170 lines
4.6 KiB
C
170 lines
4.6 KiB
C
/* $Id: page.h,v 1.55 2000/10/30 21:01:41 davem Exp $
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* page.h: Various defines and such for MMU operations on the Sparc for
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* the Linux kernel.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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#ifndef _SPARC_PAGE_H
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#define _SPARC_PAGE_H
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#include <linux/config.h>
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#ifdef CONFIG_SUN4
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#define PAGE_SHIFT 13
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#else
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#define PAGE_SHIFT 12
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#endif
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#ifndef __ASSEMBLY__
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/* I have my suspicions... -DaveM */
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#define PAGE_SIZE (1UL << PAGE_SHIFT)
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#else
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#define PAGE_SIZE (1 << PAGE_SHIFT)
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#endif
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#ifdef __KERNEL__
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#include <asm/btfixup.h>
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#ifndef __ASSEMBLY__
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#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
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#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
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#define clear_user_page(addr, vaddr, page) \
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do { clear_page(addr); \
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sparc_flush_page_to_ram(page); \
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} while (0)
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#define copy_user_page(to, from, vaddr, page) \
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do { copy_page(to, from); \
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sparc_flush_page_to_ram(page); \
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} while (0)
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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+1];
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/* Cache alias structure. Entry is valid if context != -1. */
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struct cache_palias {
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unsigned long vaddr;
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int context;
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};
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extern struct cache_palias *sparc_aliases;
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/* passing structs on the Sparc slow us down tremendously... */
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/* #define STRICT_MM_TYPECHECKS */
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#ifdef STRICT_MM_TYPECHECKS
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/*
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* These are used to make use of C type-checking..
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*/
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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 long pmdv[16]; } pmd_t;
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typedef struct { unsigned long pgd; } pgd_t;
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typedef struct { unsigned long ctxd; } ctxd_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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typedef struct { unsigned long iopgprot; } iopgprot_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).pmdv[0])
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#define pgd_val(x) ((x).pgd)
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#define ctxd_val(x) ((x).ctxd)
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#define pgprot_val(x) ((x).pgprot)
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#define iopgprot_val(x) ((x).iopgprot)
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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) } ) */ /* XXX procedure with loop */
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#define __pgd(x) ((pgd_t) { (x) } )
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#define __ctxd(x) ((ctxd_t) { (x) } )
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#define __pgprot(x) ((pgprot_t) { (x) } )
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#define __iopgprot(x) ((iopgprot_t) { (x) } )
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#else
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/*
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* .. while these make it easier on the compiler
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*/
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typedef unsigned long pte_t;
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typedef unsigned long iopte_t;
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typedef struct { unsigned long pmdv[16]; } pmd_t;
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typedef unsigned long pgd_t;
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typedef unsigned long ctxd_t;
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typedef unsigned long pgprot_t;
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typedef unsigned long iopgprot_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).pmdv[0])
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#define pgd_val(x) (x)
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#define ctxd_val(x) (x)
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#define pgprot_val(x) (x)
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#define iopgprot_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) */ /* XXX later */
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#define __pgd(x) (x)
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#define __ctxd(x) (x)
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#define __pgprot(x) (x)
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#define __iopgprot(x) (x)
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#endif
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extern unsigned long sparc_unmapped_base;
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BTFIXUPDEF_SETHI(sparc_unmapped_base)
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#define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base)
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#else /* !(__ASSEMBLY__) */
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#define __pgprot(x) (x)
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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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#define PAGE_OFFSET 0xf0000000
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#ifndef __ASSEMBLY__
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extern unsigned long phys_base;
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extern unsigned long pfn_base;
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#endif
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#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base)
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#define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))
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#define virt_to_phys __pa
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#define phys_to_virt __va
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#define pfn_to_page(pfn) (mem_map + ((pfn)-(pfn_base)))
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#define page_to_pfn(page) ((unsigned long)(((page) - mem_map) + pfn_base))
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#define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT)))
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#define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
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#define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
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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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#include <asm-generic/page.h>
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#endif /* _SPARC_PAGE_H */
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