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/*
* \brief Virtual page-table facility
* \author Thomas Friebel <tf13@os.inf.tu-dresden.de>
* \author Christian Helmuth <ch12@os.inf.tu-dresden.de>
* \date 2006-11-01
*
* This implementation uses l4rm (especially the AVL tree and userptr) to
* manage virt->phys mappings. Each mapping region is represented by one
* pgtab_object that is kept in the l4rm region userptr.
*
* For this to work, dataspaces must be attached to l4rm regions!
*/
#include <mach.h>
#include "ddekit/pgtab.h"
#include "config.h"
/*****************************
** Page-table facility API **
*****************************/
/**
* Get physical address for virtual address
*
* \param virtual virtual address
* \return physical address or 0
*/
ddekit_addr_t ddekit_pgtab_get_physaddr(const void *virtual)
{
extern int virt_to_phys (vm_address_t addr);
return virt_to_phys ((vm_address_t) virtual);
}
/**
* Get virtual address for physical address
*
* \param physical physical address
* \return virtual address or 0
*/
ddekit_addr_t ddekit_pgtab_get_virtaddr(const ddekit_addr_t physical)
{
extern int phys_to_virt (vm_address_t addr);
return phys_to_virt (physical);
}
// TODO
int ddekit_pgtab_get_type(const void *virtual)
{
#if 0
/* find pgtab object */
struct pgtab_object *p = l4rm_get_userptr(virtual);
if (!p) {
/* XXX this is verbose */
LOG_Error("no virt->phys mapping for %p", virtual);
return -1;
}
return p->type;
#endif
return 0;
}
//TODO
int ddekit_pgtab_get_size(const void *virtual)
{
#if 0
/* find pgtab object */
struct pgtab_object *p = l4rm_get_userptr(virtual);
if (!p) {
/* XXX this is verbose */
LOG_Error("no virt->phys mapping for %p", virtual);
return -1;
}
return p->size;
#endif
return 0;
}
/**
* Clear virtual->physical mapping for VM region
*
* \param virtual virtual start address for region
* \param type pgtab type for region
*/
void ddekit_pgtab_clear_region(void *virtual, int type)
{
}
/**
* Set virtual->physical mapping for VM region
*
* \param virtual virtual start address for region
* \param physical physical start address for region
* \param pages number of pages in region
* \param type pgtab type for region
*/
void ddekit_pgtab_set_region(void *virtual, ddekit_addr_t physical, int pages, int type)
{
}
void ddekit_pgtab_set_region_with_size(void *virt, ddekit_addr_t phys, int size, int type)
{
}
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