1 files changed, 61 insertions, 0 deletions
diff --git a/phys.h b/phys.h
new file mode 100644
index 0000000..5b06521
--- /dev/null
+++ b/phys.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2011 Richard Braun.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Page allocator.
+ */
+
+#ifndef _PHYS_H
+#define _PHYS_H
+
+#include "list.h"
+
+/*
+ * Page frame number.
+ */
+typedef unsigned long phys_pfn_t;
+
+/*
+ * Page descriptor.
+ */
+struct phys_page {
+    struct phys_seg *seg;
+    phys_pfn_t pfn;
+    unsigned int level;
+    struct list node;
+};
+
+void phys_init(void);
+
+struct phys_page * phys_alloc_pages(phys_pfn_t size);
+
+void phys_free_pages(struct phys_page *page, phys_pfn_t size);
+
+phys_pfn_t phys_alloc(phys_pfn_t size);
+
+void phys_free(phys_pfn_t pfn, phys_pfn_t size);
+
+void phys_info(void);
+
+#endif /* _PHYS_H */