[Mammoth] Move remaining classes to a shared folder.

lib/mammoth/util/memory_region.cpp

@@ -0,0 +1,70 @@
+#include "util/memory_region.h"
+
+#include <zcall.h>
+
+#include "util/debug.h"
+#include "util/init.h"
+
+OwnedMemoryRegion::OwnedMemoryRegion(OwnedMemoryRegion&& other)
+    : OwnedMemoryRegion(other.vmmo_cap_, other.vaddr_, other.size_) {
+  other.vmmo_cap_ = 0;
+  other.vaddr_ = 0;
+  other.size_ = 0;
+}
+
+OwnedMemoryRegion& OwnedMemoryRegion::operator=(OwnedMemoryRegion&& other) {
+  if (vmmo_cap_) {
+    check(ZCapRelease(vmmo_cap_));
+  }
+  vmmo_cap_ = other.vmmo_cap_;
+  vaddr_ = other.vaddr_;
+  size_ = other.size_;
+  other.vmmo_cap_ = 0;
+  other.vaddr_ = 0;
+  other.size_ = 0;
+  return *this;
+}
+
+OwnedMemoryRegion::~OwnedMemoryRegion() {
+  if (vmmo_cap_ != 0) {
+    check(ZAddressSpaceUnmap(gSelfVmasCap, vaddr_, vaddr_ + size_));
+    check(ZCapRelease(vmmo_cap_));
+  }
+}
+
+OwnedMemoryRegion OwnedMemoryRegion::FromCapability(z_cap_t vmmo_cap) {
+  uint64_t vaddr;
+  check(ZAddressSpaceMap(gSelfVmasCap, 0, vmmo_cap, &vaddr));
+
+  uint64_t size;
+  check(ZMemoryObjectInspect(vmmo_cap, &size));
+  // FIXME: get the size here.
+  return OwnedMemoryRegion(vmmo_cap, vaddr, size);
+}
+
+OwnedMemoryRegion OwnedMemoryRegion::ContiguousPhysical(uint64_t size,
+                                                        uint64_t* paddr) {
+  uint64_t vmmo_cap;
+  check(ZMemoryObjectCreateContiguous(size, &vmmo_cap, paddr));
+
+  uint64_t vaddr;
+  check(ZAddressSpaceMap(gSelfVmasCap, 0, vmmo_cap, &vaddr));
+
+  return OwnedMemoryRegion(vmmo_cap, vaddr, size);
+}
+
+OwnedMemoryRegion OwnedMemoryRegion::DirectPhysical(uint64_t paddr,
+                                                    uint64_t size) {
+  uint64_t vmmo_cap;
+  check(ZMemoryObjectCreatePhysical(paddr, size, &vmmo_cap));
+
+  uint64_t vaddr;
+  check(ZAddressSpaceMap(gSelfVmasCap, 0, vmmo_cap, &vaddr));
+  return OwnedMemoryRegion(vmmo_cap, vaddr, size);
+}
+
+z_cap_t OwnedMemoryRegion::DuplicateCap() {
+  z_cap_t cap;
+  check(ZCapDuplicate(vmmo_cap_, kZionPerm_All, &cap));
+  return cap;
+}