158 lines
4.3 KiB
C
158 lines
4.3 KiB
C
/*
|
|
* 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
|
|
|
|
#define PAGE_SHIFT 12
|
|
|
|
#ifndef __ASSEMBLY__
|
|
/* I have my suspicions... -DaveM */
|
|
#define PAGE_SIZE (1UL << PAGE_SHIFT)
|
|
#else
|
|
#define PAGE_SIZE (1 << PAGE_SHIFT)
|
|
#endif
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
|
|
#include <asm/btfixup.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
|
|
#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
|
|
#define clear_user_page(addr, vaddr, page) \
|
|
do { clear_page(addr); \
|
|
sparc_flush_page_to_ram(page); \
|
|
} while (0)
|
|
#define copy_user_page(to, from, vaddr, page) \
|
|
do { copy_page(to, from); \
|
|
sparc_flush_page_to_ram(page); \
|
|
} while (0)
|
|
|
|
/* The following structure is used to hold the physical
|
|
* memory configuration of the machine. This is filled in
|
|
* prom_meminit() and is later used by mem_init() to set up
|
|
* mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 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+1];
|
|
|
|
/* Cache alias structure. Entry is valid if context != -1. */
|
|
struct cache_palias {
|
|
unsigned long vaddr;
|
|
int context;
|
|
};
|
|
|
|
/* 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 pmdv[16]; } 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).pmdv[0])
|
|
#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) } ) */ /* XXX procedure with loop */
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __ctxd(x) ((ctxd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
#define __iopgprot(x) ((iopgprot_t) { (x) } )
|
|
|
|
#else
|
|
/*
|
|
* .. while these make it easier on the compiler
|
|
*/
|
|
typedef unsigned long pte_t;
|
|
typedef unsigned long iopte_t;
|
|
typedef struct { unsigned long pmdv[16]; } 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).pmdv[0])
|
|
#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) */ /* XXX later */
|
|
#define __pgd(x) (x)
|
|
#define __ctxd(x) (x)
|
|
#define __pgprot(x) (x)
|
|
#define __iopgprot(x) (x)
|
|
|
|
#endif
|
|
|
|
typedef struct page *pgtable_t;
|
|
|
|
extern unsigned long sparc_unmapped_base;
|
|
|
|
BTFIXUPDEF_SETHI(sparc_unmapped_base)
|
|
|
|
#define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base)
|
|
|
|
#else /* !(__ASSEMBLY__) */
|
|
|
|
#define __pgprot(x) (x)
|
|
|
|
#endif /* !(__ASSEMBLY__) */
|
|
|
|
#define PAGE_OFFSET 0xf0000000
|
|
#ifndef __ASSEMBLY__
|
|
extern unsigned long phys_base;
|
|
extern unsigned long pfn_base;
|
|
#endif
|
|
#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base)
|
|
#define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))
|
|
|
|
#define virt_to_phys __pa
|
|
#define phys_to_virt __va
|
|
|
|
#define ARCH_PFN_OFFSET (pfn_base)
|
|
#define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT)))
|
|
|
|
#define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
|
|
#define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/getorder.h>
|
|
|
|
#endif /* _SPARC_PAGE_H */
|