Changeset 587:bb97b4d6ac69

Timestamp:

06/07/08 22:58:15 (7 months ago)

Author:

David Anderson <dave@…>

Branch:

default

Message:

Add ROM free space to the memory map definitions.

Location:

nxos

Files:

• base/memmap.h (modified) (2 diffs)
• systems/appkernel.lds (modified) (2 diffs)

nxos/base/memmap.h

@@ -59 +59 @@
 extern U8 __stack_start__;
 extern U8 __stack_end__;
+
+extern U8 __rom_end__;
 
 extern U8 __boot_from_samba__;
@@ -156 +158 @@
 /*@}*/
 
+/** @name ROM userspace section.
+ *
+ * The ROM userspace section is the portion of ROM that is not used by
+ * the kernel. Application kernels are free to do whatever they want
+ * with this area, and it will not affect the Baseplate in any way.
+ *
+ * @note One possible use of this free ROM is to use the filesystem
+ * library to store files in the free space.
+ */
+/*@{*/
+#define NX_ROM_USERSPACE_START SYMADDR(__rom_userspace_start__)
+#define NX_ROM_USERSPACE_END ((U8*)0x140000)
+#define NX_ROM_USERSPACE_SIZE SECSIZE(NX_ROM_USERSPACE_START, NX_ROM_USERSPACE_END)
+/*@}*/
+
 /** @name Boot method
  *

nxos/systems/appkernel.lds

@@ +1 @@
+/* Copyright (c) 2007,2008 the NxOS developers
+ *
+ * See AUTHORS for a full list of the developers.
+ *
+ * Redistribution of this file is permitted under
+ * the terms of the GNU Public License (GPL) version 2.
+ */
+
 /* NXT linker script source.
  *
@@ -124 +132 @@
   SAMBA_ONLY > ram
 
-  ROM_ONLY __rom_end__ = ADDR(.text) + SIZEOF(.text) ;
+  ROM_ONLY __rom_userspace_start__ = ADDR(.text) + SIZEOF(.text);
+  SAMBA_ONLY __rom_userspace_start__ = 0;
 
   __text_start__ = ADDR(.text);