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| author | Tom <tomut@yahoo.com> | 2021-07-07 19:50:05 -0600 |
|---|---|---|
| committer | Andreas Kling <kling@serenityos.org> | 2021-07-08 11:43:34 +0200 |
| commit | 87dc4c3d2c21762d85c77b7b9588ff889cafb5ac (patch) | |
| tree | 03b6c4ca2c580060e3d0c2a1ffe398c5b53a51ac /Kernel/VM/PageDirectory.cpp | |
| parent | ad5d9d648b835f665e7a3e3eb0847c651d9c8c20 (diff) | |
| download | serenity-87dc4c3d2c21762d85c77b7b9588ff889cafb5ac.zip | |
Kernel: Move PhysicalPage classes out of the heap into an array
By moving the PhysicalPage classes out of the kernel heap into a static
array, one for each physical page, we can avoid the added overhead and
easily find them by indexing into an array.
This also wraps the PhysicalPage into a PhysicalPageEntry, which allows
us to re-use each slot with information where to find the next free
page.
Diffstat (limited to 'Kernel/VM/PageDirectory.cpp')
| -rw-r--r-- | Kernel/VM/PageDirectory.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Kernel/VM/PageDirectory.cpp b/Kernel/VM/PageDirectory.cpp index 5bc2da0f6d..3fd515697f 100644 --- a/Kernel/VM/PageDirectory.cpp +++ b/Kernel/VM/PageDirectory.cpp @@ -37,9 +37,12 @@ extern "C" PageDirectoryEntry boot_pd3[1024]; UNMAP_AFTER_INIT PageDirectory::PageDirectory() { - m_range_allocator.initialize_with_range(VirtualAddress(KERNEL_BASE + 0x02000000), 0x2f000000); + m_range_allocator.initialize_with_range(VirtualAddress(KERNEL_BASE + KERNEL_PD_OFFSET), KERNEL_PD_END - (KERNEL_BASE + KERNEL_PD_OFFSET)); m_identity_range_allocator.initialize_with_range(VirtualAddress(FlatPtr(0x00000000)), 0x00200000); +} +UNMAP_AFTER_INIT void PageDirectory::allocate_kernel_directory() +{ // Adopt the page tables already set up by boot.S #if ARCH(X86_64) PhysicalAddress boot_pml4t_paddr(virtual_to_low_physical((FlatPtr)boot_pml4t)); |