Release 4.14 arch/sparc/include/asm/page_32.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * 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 <linux/const.h>


#define PAGE_SHIFT   12

#define PAGE_SIZE    (_AC(1, UL) << PAGE_SHIFT)

#define PAGE_MASK    (~(PAGE_SIZE-1))

#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];

/* 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 __pmd(x)	((pmd_t) { { (x) }, })

#define __iopte(x)	((iopte_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) } )

#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 __pmd(x)	((pmd_t) { { (x) }, })

#define __iopte(x)	(x)

#define __pgd(x)	(x)

#define __ctxd(x)	(x)

#define __pgprot(x)	(x)

#define __iopgprot(x)	(x)

#endif


typedef struct page *pgtable_t;


#define TASK_UNMAPPED_BASE	0x50000000

#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)	pfn_to_page(__pa(kaddr) >> 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 */
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Directory: arch/sparc/include/asm

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