minix/include/ddekit/pgtab.h
Ben Gras 6a73e85ad1 retire _PROTOTYPE
. only good for obsolete K&R support
	. also remove a stray ansi.h and the proto cmd
2012-03-25 16:17:10 +02:00

90 lines
2.1 KiB
C

/*
* \brief Virtual page-table facility
* \author Thomas Friebel <tf13@os.inf.tu-dresden.de>
* \author Christian Helmuth <ch12@os.inf.tu-dresden.de>
* \date 2006-11-03
*/
#ifndef _DDEKIT_PGTAB_H
#define _DDEKIT_PGTAB_H
#include <ddekit/ddekit.h>
#include <ddekit/types.h>
/* FIXME Region types may be defined by pgtab users. Do we really need them
* here? */
enum ddekit_pgtab_type
{
PTE_TYPE_OTHER, PTE_TYPE_LARGE, PTE_TYPE_UMA, PTE_TYPE_CONTIG
};
/**
* Set virtual->physical mapping for VM region
*
* \param virt virtual start address for region
* \param phys physical start address for region
* \param pages number of pages in region
* \param type pgtab type for region
*/
void ddekit_pgtab_set_region(void *virt, ddekit_addr_t phys, int pages,
int type);
/**
* Set virtual->physical mapping for VM region given a specific size in bytes.
*
* Internally, DDEKit manages regions with pages. However, DDEs do not need to tangle
* with the underlying mechanism and therefore can use this function that takes care
* of translating a size to an amount of pages.
*/
void ddekit_pgtab_set_region_with_size(void *virt, ddekit_addr_t phys,
int size, int type);
/**
* Clear virtual->physical mapping for VM region
*
* \param virt virtual start address for region
* \param type pgtab type for region
*/
void ddekit_pgtab_clear_region(void *virt, int type);
/**
* Get physical address for virtual address
*
* \param virt virtual address
*
* \return physical address
*/
ddekit_addr_t ddekit_pgtab_get_physaddr(const void *virt);
/**
* Get virtual address for physical address
*
* \param physical physical address
*
* \return virtual address
*/
ddekit_addr_t ddekit_pgtab_get_virtaddr(const ddekit_addr_t physical);
/**
* Get type of VM region.
*
* \param virt virtual address
* \return VM region type
*/
int ddekit_pgtab_get_type(const void *virt);
/**
* Get size of VM region.
*
* \param virt virtual address
*
* \return VM region size (in bytes)
*/
int ddekit_pgtab_get_size(const void *virt);
#endif