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

   1/*
   2 * (C) Copyright 2003
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * (c) Copyright 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
   6 * (c) Copyright 2008 Renesas Solutions Corp.
   7 *
   8 * SPDX-License-Identifier:     GPL-2.0+
   9 */
  10
  11#include <common.h>
  12#include <command.h>
  13#include <asm/byteorder.h>
  14#include <asm/zimage.h>
  15
  16#ifdef CONFIG_SYS_DEBUG
  17static void hexdump(unsigned char *buf, int len)
  18{
  19        int i;
  20
  21        for (i = 0; i < len; i++) {
  22                if ((i % 16) == 0)
  23                        printf("%s%08x: ", i ? "\n" : "",
  24                                                        (unsigned int)&buf[i]);
  25                printf("%02x ", buf[i]);
  26        }
  27        printf("\n");
  28}
  29#endif
  30
  31#ifdef CONFIG_SH_SDRAM_OFFSET
  32#define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET)
  33#else
  34#define GET_INITRD_START(initrd, linux) (initrd - linux)
  35#endif
  36
  37static void set_sh_linux_param(unsigned long param_addr, unsigned long data)
  38{
  39        *(unsigned long *)(param_addr) = data;
  40}
  41
  42static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base)
  43{
  44        unsigned long val = 0;
  45        char *p = strstr(cmdline, key);
  46        if (p) {
  47                p += strlen(key);
  48                val = simple_strtol(p, NULL, base);
  49        }
  50        return val;
  51}
  52
  53int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
  54{
  55        /* Linux kernel load address */
  56        void (*kernel) (void) = (void (*)(void))images->ep;
  57        /* empty_zero_page */
  58        unsigned char *param
  59                = (unsigned char *)image_get_load(images->legacy_hdr_os);
  60        /* Linux kernel command line */
  61        char *cmdline = (char *)param + COMMAND_LINE;
  62        /* PAGE_SIZE */
  63        unsigned long size = images->ep - (unsigned long)param;
  64        char *bootargs = getenv("bootargs");
  65
  66        /*
  67         * allow the PREP bootm subcommand, it is required for bootm to work
  68         */
  69        if (flag & BOOTM_STATE_OS_PREP)
  70                return 0;
  71
  72        if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  73                return 1;
  74
  75        /* Clear zero page */
  76        memset(param, 0, size);
  77
  78        /* Set commandline */
  79        strcpy(cmdline, bootargs);
  80
  81        /* Initrd */
  82        if (images->rd_start || images->rd_end) {
  83                unsigned long ramdisk_flags = 0;
  84                int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10);
  85                if (val == 1)
  86                                ramdisk_flags |= RD_PROMPT;
  87                else
  88                                ramdisk_flags &= ~RD_PROMPT;
  89
  90                val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
  91                if (val == 1)
  92                                ramdisk_flags |= RD_DOLOAD;
  93                else
  94                                ramdisk_flags &= ~RD_DOLOAD;
  95
  96                set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001);
  97                set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags);
  98                set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200);
  99                set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001);
 100                set_sh_linux_param((unsigned long)param + INITRD_START,
 101                        GET_INITRD_START(images->rd_start, CONFIG_SYS_SDRAM_BASE));
 102                set_sh_linux_param((unsigned long)param + INITRD_SIZE,
 103                        images->rd_end - images->rd_start);
 104        }
 105
 106        /* Boot kernel */
 107        kernel();
 108
 109        /* does not return */
 110        return 1;
 111}
 112