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 * SPDX-License-Identifier:     GPL-2.0+
   9 */
  10
  11#include <common.h>
  12#include <command.h>
  13#include <fdt_support.h>
  14#include <image.h>
  15#include <u-boot/zlib.h>
  16#include <asm/byteorder.h>
  17
  18DECLARE_GLOBAL_DATA_PTR;
  19
  20int arch_fixup_fdt(void *blob)
  21{
  22        return 0;
  23}
  24
  25int do_bootm_linux(int flag, int argc, char * const argv[],
  26                   bootm_headers_t *images)
  27{
  28        /* First parameter is mapped to $r5 for kernel boot args */
  29        void    (*thekernel) (char *, ulong, ulong);
  30        char    *commandline = getenv("bootargs");
  31        ulong   rd_data_start, rd_data_end;
  32
  33        /*
  34         * allow the PREP bootm subcommand, it is required for bootm to work
  35         */
  36        if (flag & BOOTM_STATE_OS_PREP)
  37                return 0;
  38
  39        if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  40                return 1;
  41
  42        int     ret;
  43
  44        char    *of_flat_tree = NULL;
  45#if defined(CONFIG_OF_LIBFDT)
  46        /* did generic code already find a device tree? */
  47        if (images->ft_len)
  48                of_flat_tree = images->ft_addr;
  49#endif
  50
  51        thekernel = (void (*)(char *, ulong, ulong))images->ep;
  52
  53        /* find ramdisk */
  54        ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE,
  55                        &rd_data_start, &rd_data_end);
  56        if (ret)
  57                return 1;
  58
  59        bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  60
  61        if (!of_flat_tree && argc > 1)
  62                of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
  63
  64        /* fixup the initrd now that we know where it should be */
  65        if (images->rd_start && images->rd_end && of_flat_tree)
  66                ret = fdt_initrd(of_flat_tree, images->rd_start,
  67                                 images->rd_end);
  68                if (ret)
  69                        return 1;
  70
  71#ifdef DEBUG
  72        printf("## Transferring control to Linux (at address 0x%08lx) ",
  73               (ulong)thekernel);
  74        printf("ramdisk 0x%08lx, FDT 0x%08lx...\n",
  75               rd_data_start, (ulong) of_flat_tree);
  76#endif
  77
  78#ifdef XILINX_USE_DCACHE
  79        flush_cache(0, XILINX_DCACHE_BYTE_SIZE);
  80#endif
  81        /*
  82         * Linux Kernel Parameters (passing device tree):
  83         * r5: pointer to command line
  84         * r6: pointer to ramdisk
  85         * r7: pointer to the fdt, followed by the board info data
  86         */
  87        thekernel(commandline, rd_data_start, (ulong)of_flat_tree);
  88        /* does not return */
  89
  90        return 1;
  91}
  92