arch/sh/lib/zimageboot.c

   1 /*
   2  * (C) Copyright 2010
   3  *   Renesas Solutions Corp.
   4  *   Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 /*
  10  * Linux SuperH zImage loading and boot
  11  */
  12
  13 #include <common.h>
  14 #include <asm/io.h>
  15 #include <asm/zimage.h>
  16
  17 int do_sh_zimageboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  18 {
  19         ulong (*zboot_entry)(int, char * const []) = NULL;
  20         char *s0, *s1;
  21         unsigned char *param = NULL;
  22         char *cmdline;
  23         char *bootargs;
  24
  25         disable_interrupts();
  26
  27         if (argc >= 3) {
  28                 /* argv[1] holds the address of the zImage */
  29                 s0 = argv[1];
  30                 /* argv[2] holds the address of zero page */
  31                 s1 = argv[2];
  32         } else {
  33                 goto exit;
  34         }
  35
  36         if (s0)
  37                 zboot_entry = (ulong (*)(int, char * const []))simple_strtoul(s0, NULL, 16);
  38
  39         /* empty_zero_page */
  40         if (s1)
  41                 param = (unsigned char*)simple_strtoul(s1, NULL, 16);
  42
  43         /* Linux kernel command line */
  44         cmdline = (char *)param + COMMAND_LINE;
  45         bootargs = getenv("bootargs");
  46
  47         /* Clear zero page */
  48         memset(param, 0, 0x1000);
  49
  50         /* Set commandline */
  51         strcpy(cmdline, bootargs);
  52
  53         /* Boot */
  54         zboot_entry(0, NULL);
  55
  56 exit:
  57         return -1;
  58 }
  59
  60 U_BOOT_CMD(
  61         zimageboot, 3, 0,       do_sh_zimageboot,
  62         "Boot zImage for Renesas SH",
  63         ""
  64 );