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

   1/*
   2 * (C) Copyright 2007 Michal Simek
   3 * (C) Copyright 2004 Atmark Techno, Inc.
   4 *
   5 * Michal  SIMEK <monstr@monstr.eu>
   6 * Yasushi SHOJI <yashi@atmark-techno.com>
   7 *
   8 * See file CREDITS for list of people who contributed to this
   9 * project.
  10 *
  11 * This program is free software; you can redistribute it and/or
  12 * modify it under the terms of the GNU General Public License as
  13 * published by the Free Software Foundation; either version 2 of
  14 * the License, or (at your option) any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24 * MA 02111-1307 USA
  25 */
  26
  27#include <common.h>
  28#include <command.h>
  29#include <image.h>
  30#include <u-boot/zlib.h>
  31#include <asm/byteorder.h>
  32
  33DECLARE_GLOBAL_DATA_PTR;
  34
  35int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
  36{
  37        /* First parameter is mapped to $r5 for kernel boot args */
  38        void    (*theKernel) (char *, ulong, ulong);
  39        char    *commandline = getenv ("bootargs");
  40        ulong   rd_data_start, rd_data_end;
  41
  42        if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  43                return 1;
  44
  45        int     ret;
  46
  47        char    *of_flat_tree = NULL;
  48#if defined(CONFIG_OF_LIBFDT)
  49        /* did generic code already find a device tree? */
  50        if (images->ft_len)
  51                of_flat_tree = images->ft_addr;
  52#endif
  53
  54        theKernel = (void (*)(char *, ulong, ulong))images->ep;
  55
  56        /* find ramdisk */
  57        ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_MICROBLAZE,
  58                        &rd_data_start, &rd_data_end);
  59        if (ret)
  60                return 1;
  61
  62        show_boot_progress (15);
  63
  64        if (!of_flat_tree && argc > 3)
  65                of_flat_tree = (char *)simple_strtoul(argv[3], NULL, 16);
  66#ifdef DEBUG
  67        printf ("## Transferring control to Linux (at address 0x%08lx) " \
  68                                "ramdisk 0x%08lx, FDT 0x%08lx...\n",
  69                (ulong) theKernel, rd_data_start, (ulong) of_flat_tree);
  70#endif
  71
  72#ifdef XILINX_USE_DCACHE
  73#ifdef XILINX_DCACHE_BYTE_SIZE
  74        flush_cache(0, XILINX_DCACHE_BYTE_SIZE);
  75#else
  76#warning please rebuild BSPs and update configuration
  77        flush_cache(0, 32768);
  78#endif
  79#endif
  80        /*
  81         * Linux Kernel Parameters (passing device tree):
  82         * r5: pointer to command line
  83         * r6: pointer to ramdisk
  84         * r7: pointer to the fdt, followed by the board info data
  85         */
  86        theKernel (commandline, rd_data_start, (ulong) of_flat_tree);
  87        /* does not return */
  88
  89        return 1;
  90}
  91