Move VirtualMemory to AddressSpace Object

zion/object/address_space.cpp

@@ -0,0 +1,35 @@
+#include "object/address_space.h"
+
+#include "memory/kernel_stack_manager.h"
+#include "memory/paging_util.h"
+#include "memory/physical_memory.h"
+
+extern KernelStackManager* gKernelStackManager;
+
+AddressSpace AddressSpace::ForRoot() {
+  uint64_t cr3 = 0;
+  asm volatile("mov %%cr3, %0;" : "=r"(cr3));
+  return {cr3};
+}
+
+AddressSpace::AddressSpace() {
+  cr3_ = phys_mem::AllocatePage();
+  InitializePml4(cr3_);
+}
+
+uint64_t AddressSpace::AllocateUserStack() {
+  return user_stacks_.NewUserStack();
+}
+
+uint64_t AddressSpace::GetNextMemMapAddr(uint64_t size) {
+  uint64_t addr = next_memmap_addr_;
+  next_memmap_addr_ += size;
+  if (next_memmap_addr_ >= 0x30'00000000) {
+    panic("OOM: Memmap");
+  }
+  return addr;
+}
+
+uint64_t* AddressSpace::AllocateKernelStack() {
+  return gKernelStackManager->AllocateKernelStack();
+}