43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
#include "memory/kernel_vmm.h"
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#include "debug/debug.h"
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#include "memory/paging_util.h"
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namespace {
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KernelVmm* gKernelVmm = nullptr;
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}
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KernelVmm::KernelVmm() {
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if (gKernelVmm) {
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panic("KernelVmm double init.");
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}
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gKernelVmm = this;
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stack_manager_ = glcr::MakeUnique<KernelStackManager>();
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stack_manager_->SetupInterruptStack();
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}
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uint64_t KernelVmm::AcquireSlabHeapRegion(uint64_t slab_size_bytes) {
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return gKernelVmm->AcquireSlabHeapRegionInternal(slab_size_bytes);
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}
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uint64_t KernelVmm::AcquireKernelStack() {
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return gKernelVmm->stack_manager_->AllocateKernelStack();
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}
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void KernelVmm::FreeKernelStack(uint64_t stack_addr) {
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return gKernelVmm->stack_manager_->FreeKernelStack(stack_addr);
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}
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uint64_t KernelVmm::AcquireSlabHeapRegionInternal(uint64_t slab_size_bytes) {
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uint64_t next_slab = next_slab_heap_page_;
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if (next_slab >= kKernelBuddyHeapEnd) {
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panic("Slab heap overrun");
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}
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next_slab_heap_page_ += slab_size_bytes;
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// TODO: Consider handling this as a part of a page-fault handler
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// rather than auto mapping all over the place.
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EnsureResident(next_slab, slab_size_bytes);
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return next_slab;
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}
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