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Map the page bitmap to virtual memory

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This commit is contained in:
apio 2022-12-07 10:58:59 +01:00
parent 1ebd892c16
commit dad95a8160
Signed by: apio
GPG Key ID: B8A7D06E42258954
1 changed files with 11 additions and 0 deletions
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11
kernel/src/memory/MemoryManager.cpp
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@ -99,6 +99,17 @@ namespace MemoryManager
init_physical_frame_allocator(); init_physical_frame_allocator();
KernelVM::init(); KernelVM::init();
MMU::setup_initial_page_directory(); MMU::setup_initial_page_directory();
// NOTE: We force these operations to succeed, because if we can't map the frame bitmap to virtual memory
// there's no point in continuing.
auto bitmap_pages = g_frame_bitmap.size_in_bytes() / ARCH_PAGE_SIZE;
auto virtual_bitmap_base = KernelVM::alloc_several_pages(bitmap_pages).release_value();
map_frames_at(virtual_bitmap_base, (u64)g_frame_bitmap.location(), bitmap_pages,
MMU::ReadWrite | MMU::NoExecute)
.release_value();
g_frame_bitmap.initialize((void*)virtual_bitmap_base, g_frame_bitmap.size_in_bytes());
} }
void lock_frame(u64 frame) void lock_frame(u64 frame)