1 files changed, 52 insertions, 0 deletions
diff --git a/mem/zone.h b/mem/zone.h
new file mode 100644
index 0000000..7e863bf
--- /dev/null
+++ b/mem/zone.h
@@ -0,0 +1,52 @@
+#ifndef JOVE_MEM_ZONE_H
+#define JOVE_MEM_ZONE_H 1
+
+#include <stdint.h>
+#include "lib/buddymap.h"
+
+enum {
+    MEM_ZONE_STANDARD = 0, /* First GiB of physical memory. */
+    MEM_ZONE_HIGHER,
+    MEM_ZONE_COUNT
+};
+
+#define MEM_ZONE_STANDARD_BASE 0
+#define MEM_ZONE_STANDARD_LIMIT (1 * GiB)
+#define MEM_ZONE_HIGHER_BASE MEM_ZONE_STANDARD_LIMIT
+
+#define MEM_BUDDY_ORDERS 12
+struct PhysicalMemoryZone
+{
+    const char *name;
+
+    uintptr_t base;
+    uintptr_t limit;
+
+    size_t npages_total;
+    size_t npages_free;
+
+    struct BuddyMap freemap;
+};
+
+/** Using a given zone, reserve a range of physical addresses
+ * @param zone identifier of zone to modify
+ * @param base starting address to reserve
+ * @param limit ending address to reserve*/
+void mem_zone_resv(size_t zone, uintptr_t base, uintptr_t limit);
+
+/** Using a given zone, free a range of physical addresses
+ * @param zone identifier of zone to modify
+ * @param base starting address to free
+ * @param limit ending address to free*/
+void mem_zone_free(size_t zone, uintptr_t base, uintptr_t limit);
+
+/** Allocate a number of pages from the given zone
+ * @param zone identifier of the zone to modify
+ * @param pages number of pages to allocate
+ * @return physical memory address of allocation
+ *         zero if allocation failed*/
+uintptr_t mem_zone_alloc(size_t zone, size_t pages);
+
+void mem_zone_setup_standard(void);
+
+#endif