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< div id = "projectname" > MyOS Kernel
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< a href = "#nested-classes" > Data Structures< / a > |
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< a href = "#func-members" > Functions< / a > |
< a href = "#var-members" > Variables< / a > < / div >
< div class = "headertitle" >
< div class = "title" > paging.c File Reference< / div > < / div >
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< div class = "contents" >
< div class = "textblock" > < code > #include " < a class = "el" href = "pmem_8h_source.html" > ../../pmem.h< / a > " < / code > < br / >
< code > #include " < a class = "el" href = "vga__err_8h_source.html" > ../../vga_err.h< / a > " < / code > < br / >
< code > #include " < a class = "el" href = "halt_8h_source.html" > ../halt.h< / a > " < / code > < br / >
< code > #include " < a class = "el" href = "paging_8h_source.html" > ../paging.h< / a > " < / code > < br / >
< code > #include " arch_consts.h" < / code > < br / >
< code > #include < stdint.h> < / code > < br / >
< code > #include < stdlib.h> < / code > < br / >
< / div > < table class = "memberdecls" >
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< tr class = "heading" > < td colspan = "2" > < h2 class = "groupheader" > < a name = "nested-classes" > < / a >
Data Structures< / h2 > < / td > < / tr >
< tr class = "memitem:" > < td class = "memItemLeft" align = "right" valign = "top" > struct   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "structpg__struct__entry.html" > pg_struct_entry< / a > < / td > < / tr >
< tr class = "separator:" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< / table > < table class = "memberdecls" >
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< tr class = "heading" > < td colspan = "2" > < h2 class = "groupheader" > < a name = "func-members" > < / a >
Functions< / h2 > < / td > < / tr >
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< tr class = "memitem:a348bcf40a7b8895924343598c3bf5f23" > < td class = "memItemLeft" align = "right" valign = "top" > char  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a348bcf40a7b8895924343598c3bf5f23" > is_page_present< / a > (size_t page)< / td > < / tr >
< tr class = "separator:a348bcf40a7b8895924343598c3bf5f23" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
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< tr class = "memitem:a2370886c08cc1b84fa1d81fc8022db9b" > < td class = "memItemLeft" align = "right" valign = "top" > void  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a2370886c08cc1b84fa1d81fc8022db9b" > map_pages< / a > (void *virt_addr_ptr, void *phys_addr_ptr, int num_pages, char usr, char wr)< / td > < / tr >
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< tr class = "memitem:a64db1d6c4d8861128d9e6e7f671213d8" > < td class = "memItemLeft" align = "right" valign = "top" > void *  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a64db1d6c4d8861128d9e6e7f671213d8" > alloc_pages< / a > (int num_pages)< / td > < / tr >
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< tr class = "memitem:a65a7667a1f8f74a06df63ece822c70d2" > < td class = "memItemLeft" align = "right" valign = "top" > void *  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a65a7667a1f8f74a06df63ece822c70d2" > virt_to_phys< / a > (void *virt_addr_arg)< / td > < / tr >
< tr class = "separator:a65a7667a1f8f74a06df63ece822c70d2" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:a0f831aadf41672c296645a7b0df4a5c6" > < td class = "memItemLeft" align = "right" valign = "top" > void  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a0f831aadf41672c296645a7b0df4a5c6" > alloc_pages_virt< / a > (int num_pages, void *addr)< / td > < / tr >
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< tr class = "memitem:abaa0040e698c54cc890b55894bbff094" > < td class = "memItemLeft" align = "right" valign = "top" > static void  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#abaa0040e698c54cc890b55894bbff094" > invl_page< / a > (void *addr)< / td > < / tr >
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< tr class = "memitem:a8b1cb213f5783b7137f40279db762ffc" > < td class = "memItemLeft" align = "right" valign = "top" > void *  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a8b1cb213f5783b7137f40279db762ffc" > paging_new_address_space< / a > ()< / td > < / tr >
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< tr class="memitem:aee63ef1cb665a5aa68a15ab2461d20cd">< td class = "memItemLeft" align = "right" valign = "top" > void  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#aee63ef1cb665a5aa68a15ab2461d20cd" > load_address_space< / a > (void *address_space)< / td > < / tr >
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< tr class = "memitem:a8b40f4b94c1ee447f4f59b8e1c7d7227" > < td class = "memItemLeft" align = "right" valign = "top" > void  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a8b40f4b94c1ee447f4f59b8e1c7d7227" > unmap_pages< / a > (void *start_virt, int num_pages, int free_phys)< / td > < / tr >
< tr class = "separator:a8b40f4b94c1ee447f4f59b8e1c7d7227" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
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< tr class = "memitem:a569adfd13ea3c63741f64108821b1712" > < td class = "memItemLeft" align = "right" valign = "top" > void  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a569adfd13ea3c63741f64108821b1712" > paging_init< / a > ()< / td > < / tr >
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< tr class = "memitem:a7554d075a99f52e3303d1ffd90d8c166" > < td class = "memItemLeft" align = "right" valign = "top" > void *  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a7554d075a99f52e3303d1ffd90d8c166" > get_address_space< / a > ()< / td > < / tr >
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< tr class = "memitem:a6acaea424d9bee06bf95ceb299d75a11" > < td class = "memItemLeft" align = "right" valign = "top" > void  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a6acaea424d9bee06bf95ceb299d75a11" > dealloc_pages< / a > (int num_pages, void *addr)< / td > < / tr >
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< / table > < table class = "memberdecls" >
< tr class = "heading" > < td colspan = "2" > < h2 class = "groupheader" > < a name = "var-members" > < / a >
Variables< / h2 > < / td > < / tr >
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static < a class = "el" href = "structpg__struct__entry.html" > pg_struct_entry< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a9fe26a02cdadc98e2deb18ea3862c813" > page_directory< / a > [1024]< / td > < / tr >
< tr class = "memdesc:a9fe26a02cdadc98e2deb18ea3862c813" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > The kernel process's page directory. < br / > < / td > < / tr >
< tr class = "separator:a9fe26a02cdadc98e2deb18ea3862c813" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
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static < a class = "el" href = "structpg__struct__entry.html" > pg_struct_entry< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a98670d5ebec84e70de69dde9a247304c" > kern_page_tables< / a > [NUM_KERN_FRAMES]< / td > < / tr >
< tr class = "memdesc:a98670d5ebec84e70de69dde9a247304c" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > The page tables where the kernel binary is mapped in. < br / > < / td > < / tr >
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static < a class = "el" href = "structpg__struct__entry.html" > pg_struct_entry< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a6ef171b143c62a15b8f632ff06b06795" > kstack_page_tables< / a > [218 *1024]< / td > < / tr >
< tr class = "memdesc:a6ef171b143c62a15b8f632ff06b06795" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Page tables for thread kernel stacks. < br / > < / td > < / tr >
< tr class = "separator:a6ef171b143c62a15b8f632ff06b06795" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
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static < a class = "el" href = "structpg__struct__entry.html" > pg_struct_entry< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#af5bb44d01ce436047dece3cb3cd589bc" > kmalloc_page_tables< / a > [4 *1024]< / td > < / tr >
< tr class = "memdesc:af5bb44d01ce436047dece3cb3cd589bc" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Page tables for the kmalloc heap. < br / > < / td > < / tr >
< tr class = "separator:af5bb44d01ce436047dece3cb3cd589bc" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
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static < a class = "el" href = "structpg__struct__entry.html" > pg_struct_entry< / a > *  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#a279cfd77cb8461801dceb90ac39bed76" > pagdirmap< / a > =(< a class = "el" href = "structpg__struct__entry.html" > pg_struct_entry< / a > *)0xFFFFF000< / td > < / tr >
< tr class = "memdesc:a279cfd77cb8461801dceb90ac39bed76" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Pointer to the page directory entries in the recursive mapping. < br / > < / td > < / tr >
< tr class = "separator:a279cfd77cb8461801dceb90ac39bed76" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
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static < a class = "el" href = "structpg__struct__entry.html" > pg_struct_entry< / a > *  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "paging_8c.html#adbd791d7bd73da84723b77373c041a88" > page_table_map< / a > =(< a class = "el" href = "structpg__struct__entry.html" > pg_struct_entry< / a > *)0xFFC00000< / td > < / tr >
< tr class = "memdesc:adbd791d7bd73da84723b77373c041a88" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Pointer to the page table entries in the recursive mapping. < br / > < / td > < / tr >
< tr class = "separator:adbd791d7bd73da84723b77373c041a88" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
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< / table >
< h2 class = "groupheader" > Function Documentation< / h2 >
< a id = "a64db1d6c4d8861128d9e6e7f671213d8" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a64db1d6c4d8861128d9e6e7f671213d8" > ◆ < / a > < / span > alloc_pages()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > void* alloc_pages < / td >
< td > (< / td >
< td class = "paramtype" > int  < / td >
< td class = "paramname" > < em > num_pages< / em > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
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< p > Allocate virtual pages & map them to newly allocated physical memory. < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
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< table class = "params" >
< tr > < td class = "paramname" > num_pages< / td > < td > The number of pages to allocate. < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "section return" > < dt > Returns< / dt > < dd > a pointer to the allocated pages. < / dd > < / dl >
< / div >
< / div >
< a id = "a0f831aadf41672c296645a7b0df4a5c6" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a0f831aadf41672c296645a7b0df4a5c6" > ◆ < / a > < / span > alloc_pages_virt()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > void alloc_pages_virt < / td >
< td > (< / td >
< td class = "paramtype" > int  < / td >
< td class = "paramname" > < em > num_pages< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > void *  < / td >
< td class = "paramname" > < em > addr< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
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< p > Allocate virtual pages at a specific address & map them to newly allocated physical memory. < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
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< table class = "params" >
< tr > < td class = "paramname" > num_pages< / td > < td > The number of pages to allocate. < / td > < / tr >
< tr > < td class = "paramname" > addr< / td > < td > The adress to start allocation at. < / td > < / tr >
< / table >
< / dd >
< / dl >
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< / div >
< / div >
< a id = "a6acaea424d9bee06bf95ceb299d75a11" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a6acaea424d9bee06bf95ceb299d75a11" > ◆ < / a > < / span > dealloc_pages()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > void dealloc_pages < / td >
< td > (< / td >
< td class = "paramtype" > int  < / td >
< td class = "paramname" > < em > num_pages< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > void *  < / td >
< td class = "paramname" > < em > addr< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Deallocate the physical memory for pages and unmap them < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > num_pages< / td > < td > The number of pages to deallocate. < / td > < / tr >
< tr > < td class = "paramname" > addr< / td > < td > The adress to start deallocation at. < / td > < / tr >
< / table >
< / dd >
< / dl >
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< / div >
< / div >
< a id = "a1675ea0f8e4994b4fbbbe3984ca522b1" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a1675ea0f8e4994b4fbbbe3984ca522b1" > ◆ < / a > < / span > find_free_pages()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > void* find_free_pages < / td >
< td > (< / td >
< td class = "paramtype" > int  < / td >
< td class = "paramname" > < em > num_pages< / em > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Finds free virtual pages and returns the start address < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > num_pages< / td > < td > The minimum size of the free area < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "section return" > < dt > Returns< / dt > < dd > the start of the free area < / dd > < / dl >
< / div >
< / div >
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< a id = "a7554d075a99f52e3303d1ffd90d8c166" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a7554d075a99f52e3303d1ffd90d8c166" > ◆ < / a > < / span > get_address_space()< / h2 >
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< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
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< td class = "memname" > void* get_address_space < / td >
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< td > (< / td >
< td class = "paramname" > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Get the current address space < / p > < dl class = "section return" > < dt > Returns< / dt > < dd > a pointer to the current address space in physical memory. < / dd > < / dl >
< / div >
< / div >
< a id = "abaa0040e698c54cc890b55894bbff094" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#abaa0040e698c54cc890b55894bbff094" > ◆ < / a > < / span > invl_page()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "mlabels" >
< tr >
< td class = "mlabels-left" >
< table class = "memname" >
< tr >
< td class = "memname" > static void invl_page < / td >
< td > (< / td >
< td class = "paramtype" > void *  < / td >
< td class = "paramname" > < em > addr< / em > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / td >
< td class = "mlabels-right" >
< span class = "mlabels" > < span class = "mlabel" > static< / span > < / span > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Invalidates a page in the TLB, < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > addr< / td > < td > The address of the page to invalidate. < / td > < / tr >
< / table >
< / dd >
< / dl >
< / div >
< / div >
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< a id = "a348bcf40a7b8895924343598c3bf5f23" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a348bcf40a7b8895924343598c3bf5f23" > ◆ < / a > < / span > is_page_present()< / h2 >
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< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
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< td class = "memname" > char is_page_present < / td >
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< td > (< / td >
< td class = "paramtype" > size_t  < / td >
< td class = "paramname" > < em > page< / em > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Checks whether a page is present < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > page< / td > < td > The page number to check < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "section return" > < dt > Returns< / dt > < dd > Whether the page is present < / dd > < / dl >
< / div >
< / div >
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< a id = "aee63ef1cb665a5aa68a15ab2461d20cd" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#aee63ef1cb665a5aa68a15ab2461d20cd" > ◆ < / a > < / span > load_address_space()< / h2 >
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< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > void load_address_space < / td >
< td > (< / td >
< td class = "paramtype" > void *  < / td >
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< td class = "paramname" > < em > address_space< / em > < / td > < td > )< / td >
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< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Load an address space < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
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< tr > < td class = "paramname" > address_space< / td > < td > The address space to load < / td > < / tr >
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< / table >
< / dd >
< / dl >
< / div >
< / div >
< a id = "a2370886c08cc1b84fa1d81fc8022db9b" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a2370886c08cc1b84fa1d81fc8022db9b" > ◆ < / a > < / span > map_pages()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > void map_pages < / td >
< td > (< / td >
< td class = "paramtype" > void *  < / td >
< td class = "paramname" > < em > virt_addr_ptr< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > void *  < / td >
< td class = "paramname" > < em > phys_addr_ptr< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > int  < / td >
< td class = "paramname" > < em > num_pages< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > char  < / td >
< td class = "paramname" > < em > usr< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > char  < / td >
< td class = "paramname" > < em > wr< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Map virtual pages to physical frames. < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > virt_addr_ptr< / td > < td > The start of the virtual range to map. < / td > < / tr >
< tr > < td class = "paramname" > phys_addr_ptr< / td > < td > The start of the physical range to map. < / td > < / tr >
< tr > < td class = "paramname" > num_pages< / td > < td > The number of pages to map. < / td > < / tr >
< tr > < td class = "paramname" > usr< / td > < td > Are the pages acessible by user mode code < / td > < / tr >
< tr > < td class = "paramname" > wr< / td > < td > Are the pages writable by user mode code (kernel always has write permissions) < / td > < / tr >
< / table >
< / dd >
< / dl >
< / div >
< / div >
< a id = "a569adfd13ea3c63741f64108821b1712" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a569adfd13ea3c63741f64108821b1712" > ◆ < / a > < / span > paging_init()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > void paging_init < / td >
< td > (< / td >
< td class = "paramname" > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Initialize paging < / p >
< / div >
< / div >
< a id = "a8b1cb213f5783b7137f40279db762ffc" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a8b1cb213f5783b7137f40279db762ffc" > ◆ < / a > < / span > paging_new_address_space()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > void* paging_new_address_space < / td >
< td > (< / td >
< td class = "paramname" > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Create a new address space < / p > < dl class = "section return" > < dt > Returns< / dt > < dd > a pointer to the new address space in physical memory. < / dd > < / dl >
< / div >
< / div >
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< a id = "a8b40f4b94c1ee447f4f59b8e1c7d7227" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a8b40f4b94c1ee447f4f59b8e1c7d7227" > ◆ < / a > < / span > unmap_pages()< / h2 >
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< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > void unmap_pages < / td >
< td > (< / td >
< td class = "paramtype" > void *  < / td >
< td class = "paramname" > < em > start_virt< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > int  < / td >
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< td class = "paramname" > < em > num_pages< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > int  < / td >
< td class = "paramname" > < em > free_phys< / em >   < / td >
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< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Unmap virtual pages, < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > start_virt< / td > < td > The start of the virtual range to unmap. < / td > < / tr >
< tr > < td class = "paramname" > num_pages< / td > < td > The number of pages to map. < / td > < / tr >
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< tr > < td class = "paramname" > free_phys< / td > < td > Also free the physical pages the virtual pages are mapped to. < / td > < / tr >
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< / table >
< / dd >
< / dl >
< / div >
< / div >
< a id = "a65a7667a1f8f74a06df63ece822c70d2" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a65a7667a1f8f74a06df63ece822c70d2" > ◆ < / a > < / span > virt_to_phys()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > void* virt_to_phys < / td >
< td > (< / td >
< td class = "paramtype" > void *  < / td >
< td class = "paramname" > < em > virt_addr< / em > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Convert a virtual address to a physical one. < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > virt_addr< / td > < td > The virtual address to convert < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "section return" > < dt > Returns< / dt > < dd > the physical adress it maps to, or NULL if it is not mapped. < / dd > < / dl >
< / div >
< / div >
< / div > <!-- contents -->
< / div > <!-- doc - content -->
<!-- start footer part -->
< div id = "nav-path" class = "navpath" > <!-- id is needed for treeview function! -->
< ul >
< li class = "navelem" > < a class = "el" href = "dir_dc43877d82dd332f9fb2071fcca799d6.html" > kernel< / a > < / li > < li class = "navelem" > < a class = "el" href = "dir_de6efc35b99b831d558bda0d93c38d37.html" > cpu< / a > < / li > < li class = "navelem" > < a class = "el" href = "dir_4f1b1f9de0a2e79802f54c784fb69b12.html" > i386< / a > < / li > < li class = "navelem" > < a class = "el" href = "paging_8c.html" > paging.c< / a > < / li >
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< li class = "footer" > Generated by < a href = "http://www.doxygen.org/index.html" > < img class = "footer" src = "doxygen.svg" width = "104" height = "31" alt = "doxygen" / > < / a > 1.8.20 < / li >
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< / ul >
< / div >
< / body >
< / html >
