forked from xt-sys/exectos
96 lines
2.1 KiB
C++
96 lines
2.1 KiB
C++
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtoskrnl/mm/colors.cc
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* DESCRIPTION: Memory manager page coloring subsystem
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* DEVELOPERS: Aiken Harris <harraiken91@gmail.com>
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*/
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#include <xtos.hh>
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/**
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* Computes & initializes the system's page coloring.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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MM::Colors::ComputePageColoring(VOID)
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{
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UNIMPLEMENTED;
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/* Compute L2 paging colors and mask */
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PagingColors = MM_PAGING_COLORS;
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PagingColorsMask = PagingColors - 1;
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}
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/**
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* Retrieves a pointer to the color table for a specific page list and color.
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*
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* @param PageList
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* The page list type (e.g., FreePageList, ZeroedPageList).
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*
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* @param Color
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* Supplies the specific color index.
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*
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* @return This routine returns a pointer to the corresponding MMCOLOR_TABLES structure.
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*
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* @since XT 1.0
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*/
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XTAPI
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PMMCOLOR_TABLES
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MM::Colors::GetFreePages(MMPAGELISTS PageList,
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ULONG Color)
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{
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/* Return a pointer to the requested color table entry */
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return &FreePages[PageList][Color];
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}
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/**
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* Retrieves the next available color for page coloring.
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*
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* @return This routine returns the next color value, ensuring it stays within the valid color range.
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*
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* @since XT 1.0
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*/
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XTAPI
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ULONG
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MM::Colors::GetNextColor()
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{
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/* Increment the color counter and wrap it around using the mask */
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return ((++PagingColors) & PagingColorsMask);
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}
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/**
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* Retrieves the total number of page colors configured in the system.
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*
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* @return This routine returns the number of page colors.
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*
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* @since XT 1.0
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*/
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XTAPI
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ULONG
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MM::Colors::GetPagingColors()
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{
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/* Return the total number of page colors */
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return PagingColors;
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}
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/**
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* Retrieves the bitmask used for calculating a page's color.
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*
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* @return This routine returns the page color mask.
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*
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* @since XT 1.0
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*/
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XTAPI
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ULONG
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MM::Colors::GetPagingColorsMask()
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{
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/* Return the mask used for page coloring calculations */
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return PagingColorsMask;
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}
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