18 Jul
2007
18 Jul
'07
9:44 a.m.
:) Marc
--
Marc Jones
Senior Software Engineer
(970) 226-9684 Office
mailto:Marc.Jones@amd.com
http://www.amd.com/embeddedprocessors
Add execute in place to lar. Allows code to be run from the ROM.
Signed-off-by: Marc Jones marc.jones@amd.com
Index: LinuxBIOSv3/include/lar.h
===================================================================
--- LinuxBIOSv3.orig/include/lar.h 2007-07-18 10:37:02.000000000 -0600
+++ LinuxBIOSv3/include/lar.h 2007-07-17 13:29:12.000000000 -0600
@@ -76,5 +76,6 @@
int find_file(struct mem_file *archive, char *filename, struct mem_file *result);
int copy_file(struct mem_file *archive, char *filename, void *where);
int run_file(struct mem_file *archive, char *filename, void *where);
+int execute_in_place(struct mem_file *archive, char *filename);
#endif /* LAR_H */
Index: LinuxBIOSv3/lib/lar.c
===================================================================
--- LinuxBIOSv3.orig/lib/lar.c 2007-07-18 10:37:12.000000000 -0600
+++ LinuxBIOSv3/lib/lar.c 2007-07-17 13:26:55.000000000 -0600
@@ -3,6 +3,7 @@
*
* Copyright (C) 2006-2007 coresystems GmbH
* (Written by Stefan Reinauer stepan@coresystems.de for coresystems GmbH)
+ * Copyright (C) 2007 Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -103,16 +104,41 @@
return 1;
}
+
+/**
+ * Find the file in the LAR header, copy it to the desired location,
+ * and execute it. A location of 0xFFFFFFFF means execute in place (XIP).
+ */
int run_file(struct mem_file *archive, char *filename, void *where)
{
int (*v) (void);
+ struct mem_file result;
- if (copy_file(archive, filename, where)) {
- printk(BIOS_INFO, "LAR: Run file %s failed: No such file.\n",
- filename);
- return 1;
+ if ((u32) where != 0xFFFFFFFF) {
+ if (copy_file(archive, filename, where)) {
+ printk(BIOS_INFO,
+ "LAR: Run file %s failed: No such file.\n",
+ filename);
+ return 1;
+ }
+ } else { /* XIP */
+ if (find_file(archive, filename, &result)) {
+ printk(BIOS_INFO,
+ "LAR: Run file %s failed: No such file.\n",
+ filename);
+ return 1;
+ }
+ where = result.start;
}
v = where;
return v();
}
+
+/**
+ * Call run_file() to execute in place.
+ */
+int execute_in_place(struct mem_file *archive, char *filename)
+{
+ return run_file(archive, filename, (void *) 0xFFFFFFFF);
+}
\ No newline at end of file