diff --git a/include/lar.h b/include/lar.h index a6dc0af7a3..4601a49629 100644 --- a/include/lar.h +++ b/include/lar.h @@ -76,5 +76,6 @@ struct mem_file { 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 */ diff --git a/lib/lar.c b/lib/lar.c index 459373abf7..7b969213fa 100644 --- a/lib/lar.c +++ b/lib/lar.c @@ -3,6 +3,7 @@ * * Copyright (C) 2006-2007 coresystems GmbH * (Written by Stefan Reinauer 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 @@ int copy_file(struct mem_file *archive, char *filename, void *where) 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); +}