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annotate packages/hal/sh/arch/current/src/redboot_linux_exec.c @ 1661:431860e2ee69

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Improve Linux 'exec' to be sensitive to load failures
author gthomas
date Thu, 27 May 2004 13:22:05 +0000
parents 060f6b8274f3
children 74dbf4c3f2e1
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1 //==========================================================================
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2 //
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3 // redboot_linux_exec.c
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4 //
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5 // RedBoot exec command for Linux booting
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6 //
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7 //==========================================================================
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
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12 // Copyright (C) 2004 Gary Thomas
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13 //
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14 // eCos is free software; you can redistribute it and/or modify it under
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15 // the terms of the GNU General Public License as published by the Free
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16 // Software Foundation; either version 2 or (at your option) any later version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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19 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License along
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24 // with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use macros
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28 // or inline functions from this file, or you compile this file and link it
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29 // with other works to produce a work based on this file, this file does not
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30 // by itself cause the resulting work to be covered by the GNU General Public
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31 // License. However the source code for this file must still be made available
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32 // in accordance with section (3) of the GNU General Public License.
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33 //
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34 // This exception does not invalidate any other reasons why a work based on
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35 // this file might be covered by the GNU General Public License.
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36 //
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37 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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38 // at http://sources.redhat.com/ecos/ecos-license/
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39 // -------------------------------------------
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40 //####ECOSGPLCOPYRIGHTEND####
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41 //==========================================================================
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42 //#####DESCRIPTIONBEGIN####
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43 //
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44 // Author(s): t@keshi.org
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45 // Contributors: t@keshi.org, jskov
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46 // Date: 2001-06-19
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47 // Purpose: RedBoot exec command for Linux booting
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48 //
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49 //####DESCRIPTIONEND####
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50 //
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51 //===========================================================================
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52
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53 #include <redboot.h>
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54
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55 #include <cyg/infra/cyg_type.h>
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56 #include <cyg/hal/hal_intr.h>
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57 #include <cyg/hal/hal_cache.h>
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58
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59 #ifdef CYGPKG_IO_ETH_DRIVERS
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60 #include <cyg/io/eth/eth_drv.h> // Logical driver interfaces
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61 #endif
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62
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63 #define xstr(s) str(s)
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64 #define str(s...) #s
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65
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66 struct parmblock {
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67 cyg_uint32 mount_rdonly;
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68 cyg_uint32 ramdisk_flags;
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69 cyg_uint32 orig_root_dev;
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70 cyg_uint32 loader_type;
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71 cyg_uint32 initrd_start;
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72 cyg_uint32 initrd_size;
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73 };
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74
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75 static void do_exec(int argc, char *argv[]);
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76 RedBoot_cmd("exec",
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77 "Execute an image",
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78 "[-b <parameter block addr>] [-m <mount rdonly flags>]\n"
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79 " [-f <ramdisk flags>] [-r <root device>] [-l <loader type>]\n"
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80 " [-i <initrd start addr>] [-j <initrd size>] [-c \"kernel command line\"]\n"
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81 " [<entry point>]",
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82 do_exec
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83 );
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84
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85 static void
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86 do_exec(int argc, char *argv[])
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87 {
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88 cyg_uint32 entry = CYGDAT_REDBOOT_SH_LINUX_BOOT_ENTRY;
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89 cyg_uint32 base_addr = CYGDAT_REDBOOT_SH_LINUX_BOOT_BASE_ADDR;
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90 cyg_uint32 mount_rdonly = CYGDAT_REDBOOT_SH_LINUX_BOOT_MOUNT_RDONLY;
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91 cyg_uint32 ramdisk_flags = CYGDAT_REDBOOT_SH_LINUX_BOOT_RAMDISK_FLAGS;
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92 cyg_uint32 orig_root_dev = CYGDAT_REDBOOT_SH_LINUX_BOOT_ORIG_ROOT_DEV;
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93 cyg_uint32 loader_type = CYGDAT_REDBOOT_SH_LINUX_BOOT_LOADER_TYPE;
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94 cyg_uint32 initrd_start = CYGDAT_REDBOOT_SH_LINUX_BOOT_INITRD_START;
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95 cyg_uint32 initrd_size = CYGDAT_REDBOOT_SH_LINUX_BOOT_INITRD_SIZE;
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96 char *cmd_line = xstr(CYGDAT_REDBOOT_SH_LINUX_BOOT_COMMAND_LINE);
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97
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98 bool base_addr_set, mount_rdonly_set, ramdisk_flags_set;
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99 bool orig_root_dev_set, loader_type_set;
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100 bool initrd_start_set, initrd_size_set, cmd_line_set;
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101
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102 struct option_info opts[8];
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103 struct parmblock *pb;
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104 char *pcmd;
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105 int oldints;
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106
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107 init_opts(&opts[0], 'b', true, OPTION_ARG_TYPE_NUM,
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108 (void **)&base_addr, &base_addr_set, "base address");
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109 init_opts(&opts[1], 'm', true, OPTION_ARG_TYPE_NUM,
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110 (void **)&mount_rdonly, &mount_rdonly_set, "mount_rdonly");
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111 init_opts(&opts[2], 'f', true, OPTION_ARG_TYPE_NUM,
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112 (void **)&ramdisk_flags, &ramdisk_flags_set, "ramdisk_flags");
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113 init_opts(&opts[3], 'r', true, OPTION_ARG_TYPE_NUM,
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114 (void **)&orig_root_dev, &orig_root_dev_set, "orig_root_dev");
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115 init_opts(&opts[4], 'l', true, OPTION_ARG_TYPE_NUM,
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116 (void **)&loader_type, &loader_type_set, "loader_type");
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117 init_opts(&opts[5], 'i', true, OPTION_ARG_TYPE_NUM,
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118 (void **)&initrd_start, &initrd_start_set, "initrd_start");
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119 init_opts(&opts[6], 'j', true, OPTION_ARG_TYPE_NUM,
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120 (void **)&initrd_size, &initrd_size_set, "initrd_size");
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121 init_opts(&opts[7], 'c', true, OPTION_ARG_TYPE_STR,
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122 (void **)&cmd_line, &cmd_line_set, "kernel command line");
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123
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124 if (!scan_opts(argc, argv, 1, opts, 8, (void *)&entry,
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125 OPTION_ARG_TYPE_NUM, "entry address"))
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126 return;
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127 if (entry == (unsigned long)NO_MEMORY) {
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128 diag_printf("Can't execute Linux - invalid entry address\n");
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129 return;
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130 }
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131
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132 diag_printf("Now booting linux kernel:\n");
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133 diag_printf(" Base address 0x%08x Entry 0x%08x\n", base_addr, entry);
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134 diag_printf(" Cmdline : %s\n", cmd_line);
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135
822
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136 #ifdef CYGPKG_IO_ETH_DRIVERS
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137 eth_drv_stop();
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138 #endif
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139
208
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140 HAL_DISABLE_INTERRUPTS(oldints);
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141 HAL_DCACHE_SYNC();
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142 HAL_ICACHE_DISABLE();
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143 HAL_DCACHE_DISABLE();
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144 HAL_DCACHE_SYNC();
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145 HAL_ICACHE_INVALIDATE_ALL();
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146 HAL_DCACHE_INVALIDATE_ALL();
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147
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148 pb = (struct parmblock *)base_addr;
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149 if (mount_rdonly_set) {
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150 pb->mount_rdonly = mount_rdonly;
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151 diag_printf(" MOUNT_RDONLY : 0x%08x\n", mount_rdonly);
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152 }
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153 if (ramdisk_flags_set) {
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154 pb->ramdisk_flags = ramdisk_flags;
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155 diag_printf(" RAMDISK_FLAGS : 0x%08x\n", ramdisk_flags);
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156 }
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157 if (orig_root_dev_set) {
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158 pb->orig_root_dev = orig_root_dev;
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159 diag_printf(" ORIG_ROOT_DEV : 0x%08x\n", orig_root_dev);
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160 }
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161 if (loader_type_set) {
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162 pb->loader_type = loader_type;
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163 diag_printf(" LOADER_TYPE : 0x%08x\n", loader_type);
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164 }
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165 if (initrd_start_set) {
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166 pb->initrd_start = initrd_start;
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167 pb->initrd_size = initrd_size;
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168 diag_printf(" INITRD_START : 0x%08x\n", initrd_start);
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169 diag_printf(" INITRD_SIZE : 0x%08x\n", initrd_size);
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170 }
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171
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172 pcmd = (char *)(base_addr + 0x100);
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173 while ((*pcmd++ = *cmd_line++));
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174
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175 asm ("jmp @%0\n\tnop" : : "r" (entry));
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176 }