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[kernel] Replace buffer_cache with vm_area_buffers

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In order to reduce the amount of tracked state, now use the
vm_area_buffers instead of a VMA with buffer_cache on top.
This commit is contained in:
Justin C. Miller
2020-09-27 15:34:24 -07:00
parent 67ebc58812
commit f7f8bb3f45
14 changed files with 161 additions and 120 deletions
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15
src/kernel/memory_bootstrap.cpp
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@@ -38,6 +38,18 @@ frame_allocator &g_frame_allocator = __g_frame_allocator_storage.value;
static kutil::no_construct<vm_area_open> __g_kernel_heap_area_storage;
vm_area_open &g_kernel_heap_area = __g_kernel_heap_area_storage.value;
vm_area_buffers g_kernel_stacks {
memory::kernel_max_stacks,
vm_space::kernel_space(),
vm_flags::write,
memory::kernel_stack_pages};
vm_area_buffers g_kernel_buffers {
memory::kernel_max_buffers,
vm_space::kernel_space(),
vm_flags::write,
memory::kernel_buffer_pages};
void * operator new(size_t size) { return g_kernel_heap.allocate(size); }
void * operator new [] (size_t size) { return g_kernel_heap.allocate(size); }
void operator delete (void *p) noexcept { return g_kernel_heap.free(p); }
@@ -136,6 +148,9 @@ memory_initialize_post_ctors(args::header *kargs)
if (current_bytes)
g_kernel_space.commit(current_start, current_bytes);
*/
vm_space &vm = vm_space::kernel_space();
vm.add(memory::stacks_start, &g_kernel_stacks);
vm.add(memory::buffers_start, &g_kernel_buffers);
g_frame_allocator.free(
reinterpret_cast<uintptr_t>(kargs->page_table_cache),