minix/include/ddekit/pgtab.h

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2011-02-25 13:31:20 +01:00
/*
* \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
*/
_PROTOTYPE( 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.
*/
_PROTOTYPE( 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
*/
_PROTOTYPE( void ddekit_pgtab_clear_region,
(void *virt, int type));
/**
* Get physical address for virtual address
*
* \param virt virtual address
*
* \return physical address
*/
_PROTOTYPE( ddekit_addr_t ddekit_pgtab_get_physaddr, (const void *virt));
/**
* Get virtual address for physical address
*
* \param physical physical address
*
* \return virtual address
*/
_PROTOTYPE( 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
*/
_PROTOTYPE( int ddekit_pgtab_get_type, (const void *virt));
/**
* Get size of VM region.
*
* \param virt virtual address
*
* \return VM region size (in bytes)
*/
_PROTOTYPE( int ddekit_pgtab_get_size, (const void *virt));
#endif