lib_blackfin/bf533_linux.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 image_header_t header;
  46 extern void flush_instruction_cache(void);
  47 extern void flush_data_cache(void);
  48 static char *make_command_line(void);
  49
  50 void do_bootm_linux(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
  51                     ulong addr, ulong * len_ptr, int verify)
  52 {
  53         int (*appl) (char *cmdline);
  54         char *cmdline;
  55
  56 #ifdef SHARED_RESOURCES
  57         swap_to(FLASH);
  58 #endif
  59
  60         appl = (int (*)(char *))ntohl(header.ih_ep);
  61         printf("Starting Kernel at = %x\n", appl);
  62         cmdline = make_command_line();
  63         if (icache_status()) {
  64                 flush_instruction_cache();
  65                 icache_disable();
  66         }
  67         if (dcache_status()) {
  68                 flush_data_cache();
  69                 dcache_disable();
  70         }
  71         (*appl) (cmdline);
  72 }
  73
  74 char *make_command_line(void)
  75 {
  76         char *dest = (char *)CMD_LINE_ADDR;
  77         char *bootargs;
  78
  79         if ((bootargs = getenv("bootargs")) == NULL)
  80                 return NULL;
  81
  82         strncpy(dest, bootargs, 0x1000);
  83         dest[0xfff] = 0;
  84         return dest;
  85 }