x86: Move do_go_exec() out of board.c
--
Changes for v2:
- None
diff --git a/arch/x86/lib/cmd_boot.c b/arch/x86/lib/cmd_boot.c
new file mode 100644
index 0000000..a81a9a3
--- /dev/null
+++ b/arch/x86/lib/cmd_boot.c
@@ -0,0 +1,64 @@
+/*
+ * (C) Copyright 2008-2011
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ *
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <malloc.h>
+#include <asm/u-boot-x86.h>
+
+unsigned long do_go_exec(ulong (*entry)(int, char * const []),
+ int argc, char * const argv[])
+{
+ unsigned long ret = 0;
+ char **argv_tmp;
+
+ /*
+ * x86 does not use a dedicated register to pass the pointer to
+ * the global_data, so it is instead passed as argv[-1]. By using
+ * argv[-1], the called 'Application' can use the contents of
+ * argv natively. However, to safely use argv[-1] a new copy of
+ * argv is needed with the extra element
+ */
+ argv_tmp = malloc(sizeof(char *) * (argc + 1));
+
+ if (argv_tmp) {
+ argv_tmp[0] = (char *)gd;
+
+ memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
+
+ ret = (entry) (argc, &argv_tmp[1]);
+ free(argv_tmp);
+ }
+
+ return ret;
+}