add the possibility to have a arch specific 'go' command. Some

architectures need this (e.g. blackfin and i386)

arch/blackfin/lib/board.c

@@ -32,7 +32,7 @@
 #include <init.h>
 #include <environment.h>
 #include <mem_malloc.h>
-#include "blackfin_board.h"
+#include <asm/cpu.h>
 
 int blackfin_mem_malloc_init(void)
 {
@@ -43,8 +43,13 @@ int blackfin_mem_malloc_init(void)
 
 core_initcall(blackfin_mem_malloc_init);
 
-void reset_cpu(ulong ignored)
+int arch_execute(unsigned long address, int argc, char *argv[])
 {
-	printf("do not ave a reset function\n");
-	while (1);
+	int ret;
+
+	icache_disable();
+	ret = ((ulong (*)(int, char *[]))address) (argc, &argv[0]);
+	icache_enable();
+
+	return ret;
 }

commands/go.c

@@ -34,7 +34,7 @@ int do_go (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	int     rcode = 0;
 
 	if (argc < 2) {
-		printf ("Usage:\n%s\n", cmdtp->usage);
+		u_boot_cmd_usage(cmdtp);
 		return 1;
 	}
 
@@ -42,26 +42,11 @@ int do_go (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 	printf ("## Starting application at 0x%08lX ...\n", addr);
 
-	/*
-	 * pass address parameter as argv[0] (aka command name),
-	 * and all remaining args
-	 */
-#if defined(CONFIG_I386)
-	/*
-	 * x86 does not use a dedicated register to pass the pointer
-	 * to the global_data
-	 */
-	argv[0] = (char *)gd;
-#endif
-#if !defined(CONFIG_NIOS)
-	rc = ((ulong (*)(int, char *[]))addr) (--argc, &argv[1]);
+#ifdef ARCH_HAS_EXECUTE
+	rc = arch_execute(addr, argc, &argv[1]);
 #else
-	/*
-	 * Nios function pointers are address >> 1
-	 */
-	rc = ((ulong (*)(int, char *[]))(addr>>1)) (--argc, &argv[1]);
+	rc = ((ulong (*)(int, char *[]))addr) (--argc, &argv[1]);
 #endif
-	if (rc != 0) rcode = 1;
 
 	printf ("## Application terminated, rc = 0x%lX\n", rc);
 	return rcode;

include/common.h

@@ -164,6 +164,8 @@ int parse_area_spec(const char *str, ulong *start, ulong *size);
 /* Just like simple_strtoul(), but this one honors a K/M/G suffix */
 unsigned long strtoul_suffix(const char *str, char **endp, int base);
 
-extern void start_uboot(void);
+void start_uboot(void);
+
+int arch_execute(unsigned long address, int argc, char *argv[]);
 
 #endif	/* __COMMON_H_ */