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

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2007 Michal Simek
   4 * (C) Copyright 2004 Atmark Techno, Inc.
   5 *
   6 * Michal  SIMEK <monstr@monstr.eu>
   7 * Yasushi SHOJI <yashi@atmark-techno.com>
   8 */
   9
  10#include <common.h>
  11#include <command.h>
  12#include <fdt_support.h>
  13#include <image.h>
  14#include <u-boot/zlib.h>
  15#include <asm/byteorder.h>
  16
  17int do_bootm_linux(int flag, int argc, char * const argv[],
  18                   bootm_headers_t *images)
  19{
  20        /* First parameter is mapped to $r5 for kernel boot args */
  21        void    (*thekernel) (char *, ulong, ulong);
  22        char    *commandline = env_get("bootargs");
  23        ulong   rd_data_start, rd_data_end;
  24
  25        /*
  26         * allow the PREP bootm subcommand, it is required for bootm to work
  27         */
  28        if (flag & BOOTM_STATE_OS_PREP)
  29                return 0;
  30
  31        if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  32                return 1;
  33
  34        int     ret;
  35
  36        char    *of_flat_tree = NULL;
  37#if defined(CONFIG_OF_LIBFDT)
  38        /* did generic code already find a device tree? */
  39        if (images->ft_len)
  40                of_flat_tree = images->ft_addr;
  41#endif
  42
  43        thekernel = (void (*)(char *, ulong, ulong))images->ep;
  44
  45        /* find ramdisk */
  46        ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE,
  47                        &rd_data_start, &rd_data_end);
  48        if (ret)
  49                return 1;
  50
  51        bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  52
  53        if (!of_flat_tree && argc > 1)
  54                of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
  55
  56        /* fixup the initrd now that we know where it should be */
  57        if (images->rd_start && images->rd_end && of_flat_tree) {
  58                ret = fdt_initrd(of_flat_tree, images->rd_start,
  59                                 images->rd_end);
  60                if (ret)
  61                        return 1;
  62        }
  63
  64#ifdef DEBUG
  65        printf("## Transferring control to Linux (at address 0x%08lx) ",
  66               (ulong)thekernel);
  67        printf("ramdisk 0x%08lx, FDT 0x%08lx...\n",
  68               rd_data_start, (ulong) of_flat_tree);
  69#endif
  70
  71#ifdef XILINX_USE_DCACHE
  72        flush_cache(0, XILINX_DCACHE_BYTE_SIZE);
  73#endif
  74        /*
  75         * Linux Kernel Parameters (passing device tree):
  76         * r5: pointer to command line
  77         * r6: pointer to ramdisk
  78         * r7: pointer to the fdt, followed by the board info data
  79         */
  80        thekernel(commandline, rd_data_start, (ulong)of_flat_tree);
  81        /* does not return */
  82
  83        return 1;
  84}
  85