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[kernel] Move the page table cache into page_table

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Further chipping away at page_manager: the cache of pages to be used as
page tables gets moved to a static in page_table.
This commit is contained in:
Justin C. Miller
2020-09-17 21:30:05 -07:00
parent 09575370ce
commit ac67111b83
7 changed files with 86 additions and 71 deletions
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10
src/kernel/page_manager.h
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@@ -90,15 +90,6 @@ public:
inline page_table * get_kernel_pml4() { return m_kernel_pml4; }
private:
/// Allocate a page for a page table, or pull one from the cache
/// \returns An empty page mapped in page space
page_table * get_table_page();
/// Return a set of mapped contiguous pages to the page cache.
/// \arg pages Pointer to the first page to be returned
/// \arg count Number of pages in the range
void free_table_pages(void *pages, size_t count);
/// Helper function to allocate a new page table. If table entry `i` in
/// table `base` is empty, allocate a new page table and point `base[i]` at
/// it.
@@ -138,7 +129,6 @@ private:
page_table_indices index = {});
page_table *m_kernel_pml4; ///< The PML4 of just kernel pages
free_page_header *m_page_cache; ///< Cache of free pages to use for tables
frame_allocator &m_frames;