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