Initial commit

include/l4/generic/physmem.h

@@ -0,0 +1,45 @@
+/*
+ * Boot time memory initialisation and memory allocator interface.
+ *
+ * Copyright (C) 2007 Bahadir Balban
+ *
+ */
+#ifndef __GENERIC_PHYSMEM_H__
+#define __GENERIC_PHYSMEM_H__
+
+#include <l4/lib/list.h>
+#include INC_PLAT(offsets.h)
+#include INC_GLUE(memory.h)
+
+#define PHYSMEM_TOTAL_PAGES	((PHYS_MEM_END - PHYS_MEM_START) >> PAGE_BITS)
+
+/* A compact memory descriptor to determine used/unused pages in the system */
+struct page_bitmap {
+	unsigned long pfn_start;
+	unsigned long pfn_end;
+	unsigned int map[PHYSMEM_TOTAL_PAGES >> 5];
+};
+
+/* Describes a portion of physical memory. */
+struct memdesc {
+	unsigned int start;
+	unsigned int end;
+	unsigned int free_cur;
+	unsigned int free_end;
+	unsigned int numpages;
+};
+
+#if defined(__KERNEL__)
+/* Describes bitmap of used/unused state for all physical pages */
+extern struct page_bitmap page_map;
+extern struct memdesc physmem;
+#endif
+
+/* Sets the global page map as used/unused. Aligns input when needed. */
+int set_page_map(unsigned long start, int numpages, int val);
+
+/* Memory allocator interface */
+void physmem_init(void);
+void memory_init(void);
+
+#endif /* __GENERIC_PHYSMEM_H__ */