LXR uboot/arch/openrisc/lib/bootm.c

   1/*
   2 * (C) Copyright 2011 Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
   3 *
   4 * Based on microblaze implementation by:
   5 * (C) Copyright 2007 Michal Simek
   6 * (C) Copyright 2004 Atmark Techno, Inc.
   7 *
   8 * Michal  SIMEK <monstr@monstr.eu>
   9 * Yasushi SHOJI <yashi@atmark-techno.com>
  10 *
  11 * See file CREDITS for list of people who contributed to this
  12 * project.
  13 *
  14 * This program is free software; you can redistribute it and/or
  15 * modify it under the terms of the GNU General Public License as
  16 * published by the Free Software Foundation; either version 2 of
  17 * the License, or (at your option) any later version.
  18 *
  19 * This program is distributed in the hope that it will be useful,
  20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 * GNU General Public License for more details.
  23 *
  24 * You should have received a copy of the GNU General Public License
  25 * along with this program; if not, write to the Free Software
  26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27 * MA 02111-1307 USA
  28 */
  29
  30#include <common.h>
  31#include <command.h>
  32#include <image.h>
  33#include <u-boot/zlib.h>
  34#include <asm/byteorder.h>
  35
  36DECLARE_GLOBAL_DATA_PTR;
  37
  38int do_bootm_linux(int flag, int argc, char * const argv[],
  39                        bootm_headers_t *images)
  40{
  41        void    (*kernel) (unsigned int);
  42        ulong   rd_data_start, rd_data_end;
  43
  44        if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  45                return 1;
  46
  47        int     ret;
  48
  49        char    *of_flat_tree = NULL;
  50#if defined(CONFIG_OF_LIBFDT)
  51        /* did generic code already find a device tree? */
  52        if (images->ft_len)
  53                of_flat_tree = images->ft_addr;
  54#endif
  55
  56        kernel = (void (*)(unsigned int))images->ep;
  57
  58        /* find ramdisk */
  59        ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_OPENRISC,
  60                        &rd_data_start, &rd_data_end);
  61        if (ret)
  62                return 1;
  63
  64        show_boot_progress(15);
  65
  66        if (!of_flat_tree && argc > 3)
  67                of_flat_tree = (char *)simple_strtoul(argv[3], NULL, 16);
  68#ifdef DEBUG
  69        printf("## Transferring control to Linux (at address 0x%08lx) " \
  70                                "ramdisk 0x%08lx, FDT 0x%08lx...\n",
  71                (ulong) kernel, rd_data_start, (ulong) of_flat_tree);
  72#endif
  73        if (dcache_status() || icache_status())
  74                flush_cache((ulong)kernel, max(checkdcache(), checkicache()));
  75
  76        /*
  77         * Linux Kernel Parameters (passing device tree):
  78         * r3: pointer to the fdt, followed by the board info data
  79         */
  80        kernel((unsigned int) of_flat_tree);
  81        /* does not return */
  82
  83        return 1;
  84}
  85