lib_blackfin/bootm.c

   1 /*
   2  * U-boot - bf533_linux.c
   3  *
   4  * Copyright (c) 2005-2007 Analog Devices Inc.
   5  *
   6  * (C) Copyright 2000-2004
   7  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  25  * MA 02110-1301 USA
  26  */
  27
  28 /* Dummy functions, currently not in Use */
  29
  30 #include <common.h>
  31 #include <command.h>
  32 #include <image.h>
  33 #include <zlib.h>
  34 #include <asm/byteorder.h>
  35
  36 #define LINUX_MAX_ENVS          256
  37 #define LINUX_MAX_ARGS          256
  38
  39 #define CMD_LINE_ADDR 0xFF900000        /* L1 scratchpad */
  40
  41 #ifdef SHARED_RESOURCES
  42 extern void swap_to(int device_id);
  43 #endif
  44
  45 extern void flush_instruction_cache(void);
  46 extern void flush_data_cache(void);
  47 static char *make_command_line(void);
  48
  49 void do_bootm_linux(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
  50                     image_header_t *hdr, int verify)
  51 {
  52         int (*appl) (char *cmdline);
  53         char *cmdline;
  54
  55 #ifdef SHARED_RESOURCES
  56         swap_to(FLASH);
  57 #endif
  58
  59         appl = (int (*)(char *))image_get_ep (hdr);
  60         printf("Starting Kernel at = %x\n", appl);
  61         cmdline = make_command_line();
  62         if (icache_status()) {
  63                 flush_instruction_cache();
  64                 icache_disable();
  65         }
  66         if (dcache_status()) {
  67                 flush_data_cache();
  68                 dcache_disable();
  69         }
  70         (*appl) (cmdline);
  71 }
  72
  73 char *make_command_line(void)
  74 {
  75         char *dest = (char *)CMD_LINE_ADDR;
  76         char *bootargs;
  77
  78         if ((bootargs = getenv("bootargs")) == NULL)
  79                 return NULL;
  80
  81         strncpy(dest, bootargs, 0x1000);
  82         dest[0xfff] = 0;
  83         return dest;
  84 }