1 /*
2 * U-boot - boot.c - misc boot helper functions
3 *
4 * Copyright (c) 2005-2008 Analog Devices Inc.
5 *
6 * (C) Copyright 2000-2004
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 *
9 * Licensed under the GPL-2 or later.
10 */
11
12 #include <common.h>
13 #include <command.h>
14 #include <image.h>
15 #include <asm/blackfin.h>
16
17 #ifdef SHARED_RESOURCES
18 extern void swap_to(int device_id);
19 #endif
20
make_command_line(void)21 static char *make_command_line(void)
22 {
23 char *dest = (char *)CONFIG_LINUX_CMDLINE_ADDR;
24 char *bootargs = getenv("bootargs");
25
26 if (bootargs == NULL)
27 return NULL;
28
29 strncpy(dest, bootargs, CONFIG_LINUX_CMDLINE_SIZE);
30 dest[CONFIG_LINUX_CMDLINE_SIZE - 1] = 0;
31 return dest;
32 }
33
34 extern ulong bfin_poweron_retx;
35
do_bootm_linux(int flag,int argc,char * argv[],bootm_headers_t * images)36 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
37 {
38 int (*appl) (char *cmdline);
39 char *cmdline;
40
41 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
42 return 1;
43
44 #ifdef SHARED_RESOURCES
45 swap_to(FLASH);
46 #endif
47
48 appl = (int (*)(char *))images->ep;
49
50 printf("Starting Kernel at = %p\n", appl);
51 cmdline = make_command_line();
52 icache_disable();
53 dcache_disable();
54 asm __volatile__(
55 "RETX = %[retx];"
56 "CALL (%0);"
57 :
58 : "p"(appl), "q0"(cmdline), [retx] "d"(bfin_poweron_retx)
59 );
60 /* does not return */
61
62 return 1;
63 }
64