memblock can now self re-allocate its internal buffers

memory allocated by memblock_alloc() can now be limited to a certain region.

sandbox/vm/vm_bootstrap.c

@@ -0,0 +1,34 @@
+#include <limits.h>
+#include <socks/vm.h>
+#include <socks/memblock.h>
+#include <stddef.h>
+#include <limits.h>
+
+/* One vm_pg_data_t per NUMA node. Right now we're only worrying about a single node */
+static vm_pg_data_t node_data = {};
+
+kern_status_t vm_bootstrap(const vm_region_t *mem_map, size_t nr_mem_map_entries)
+{
+	uintptr_t pmap_min = UINTPTR_MAX, pmap_max = 0x0;
+
+	for (size_t i = 0; i < nr_mem_map_entries; i++) {
+		if (mem_map[i].r_base < pmap_min) {
+			pmap_min = mem_map[i].r_base;
+		}
+
+		if (mem_map[i].r_limit > pmap_max) {
+			pmap_max = mem_map[i].r_limit;
+		}
+	}
+
+	memblock_add(pmap_min, pmap_max);
+
+
+	for (size_t i = 0; i < nr_mem_map_entries; i++) {
+		if (mem_map[i].r_status == VM_REGION_RESERVED) {
+			memblock_reserve(mem_map[i].r_base, mem_map[i].r_limit);
+		}
+	}
+
+	return KERN_OK;
+}