LXR uboot/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
  17int 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 = env_get("bootargs");
  46
  47        /* Clear zero page */
  48        /* cppcheck-suppress nullPointer */
  49        memset(param, 0, 0x1000);
  50
  51        /* Set commandline */
  52        strcpy(cmdline, bootargs);
  53
  54        /* Boot */
  55        zboot_entry(0, NULL);
  56
  57exit:
  58        return -1;
  59}
  60
  61U_BOOT_CMD(
  62        zimageboot, 3, 0,       do_sh_zimageboot,
  63        "Boot zImage for Renesas SH",
  64        ""
  65);
  66