1 files changed, 39 insertions, 0 deletions
diff --git a/memory/phys.c b/memory/phys.c
new file mode 100644
index 0000000..4d9dbc1
--- /dev/null
+++ b/memory/phys.c
@@ -0,0 +1,39 @@
+#include "memory.h"
+#include "zone.h"
+#include "jove.h"
+
+void
+pm_reserve(physptr_t start, physptr_t end)
+{
+    size_t zone = pm_zone_for(start);
+    size_t limit = pm_zone_bound_upper(zone);
+
+    if(end > limit) {
+        pm_reserve(limit, end);
+        end = limit;
+    }
+    pm_zone_resv(MEM_ZONE_STANDARD, start, end);
+}
+
+void 
+pm_release(physptr_t start, physptr_t end)
+{
+    size_t zone = pm_zone_for(start);
+    size_t limit = pm_zone_bound_upper(zone);
+
+    if(end > limit) {
+        pm_release(limit, end);
+        end = limit;
+    }
+    pm_zone_free(MEM_ZONE_STANDARD, start, end);
+}
+
+physptr_t
+pm_alloc(size_t pages)
+{
+    if(pm_zone_pages_free(MEM_ZONE_HIGHER) >= pages)
+        return pm_zone_alloc(MEM_ZONE_HIGHER, pages);
+    if(pm_zone_pages_free(MEM_ZONE_STANDARD) >= pages)
+        return pm_zone_alloc(MEM_ZONE_STANDARD, pages);
+    kpanic("Kernel ran out of physical memory!\n");
+}