include/image.h

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #ifndef __IMAGE_H__
  25 #define __IMAGE_H__
  26
  27 /*
  28  * Operating System Codes
  29  */
  30 #define IH_OS_INVALID           0       /* Invalid OS   */
  31 #define IH_OS_OPENBSD           1       /* OpenBSD      */
  32 #define IH_OS_NETBSD            2       /* NetBSD       */
  33 #define IH_OS_FREEBSD           3       /* FreeBSD      */
  34 #define IH_OS_4_4BSD            4       /* 4.4BSD       */
  35 #define IH_OS_LINUX             5       /* Linux        */
  36 #define IH_OS_SVR4              6       /* SVR4         */
  37 #define IH_OS_ESIX              7       /* Esix         */
  38 #define IH_OS_SOLARIS           8       /* Solaris      */
  39 #define IH_OS_IRIX              9       /* Irix         */
  40 #define IH_OS_SCO               10      /* SCO          */
  41 #define IH_OS_DELL              11      /* Dell         */
  42 #define IH_OS_NCR               12      /* NCR          */
  43 #define IH_OS_LYNXOS            13      /* LynxOS       */
  44 #define IH_OS_VXWORKS           14      /* VxWorks      */
  45 #define IH_OS_PSOS              15      /* pSOS         */
  46 #define IH_OS_QNX               16      /* QNX          */
  47 #define IH_OS_U_BOOT            17      /* Firmware     */
  48
  49 /*
  50  * CPU Architecture Codes (supported by Linux)
  51  */
  52 #define IH_CPU_INVALID          0       /* Invalid CPU  */
  53 #define IH_CPU_ALPHA            1       /* Alpha        */
  54 #define IH_CPU_ARM              2       /* ARM          */
  55 #define IH_CPU_I386             3       /* Intel x86    */
  56 #define IH_CPU_IA64             4       /* IA64         */
  57 #define IH_CPU_MIPS             5       /* MIPS         */
  58 #define IH_CPU_MIPS64           6       /* MIPS  64 Bit */
  59 #define IH_CPU_PPC              7       /* PowerPC      */
  60 #define IH_CPU_S390             8       /* IBM S390     */
  61 #define IH_CPU_SH               9       /* SuperH       */
  62 #define IH_CPU_SPARC            10      /* Sparc        */
  63 #define IH_CPU_SPARC64          11      /* Sparc 64 Bit */
  64
  65 /*
  66  * Image Types
  67  *
  68  * "Standalone Programs" are directly runnable in the environment
  69  *      provided by U-Boot; it is expected that (if they behave
  70  *      well) you can continue to work in U-Boot after return from
  71  *      the Standalone Program.
  72  * "OS Kernel Images" are usually images of some Embedded OS which
  73  *      will take over control completely. Usually these programs
  74  *      will install their own set of exception handlers, device
  75  *      drivers, set up the MMU, etc. - this means, that you cannot
  76  *      expect to re-enter U-Boot except by resetting the CPU.
  77  * "RAMDisk Images" are more or less just data blocks, and their
  78  *      parameters (address, size) are passed to an OS kernel that is
  79  *      being started.
  80  * "Multi-File Images" contain several images, typically an OS
  81  *      (Linux) kernel image and one or more data images like
  82  *      RAMDisks. This construct is useful for instance when you want
  83  *      to boot over the network using BOOTP etc., where the boot
  84  *      server provides just a single image file, but you want to get
  85  *      for instance an OS kernel and a RAMDisk image.
  86  *
  87  *      "Multi-File Images" start with a list of image sizes, each
  88  *      image size (in bytes) specified by an "uint32_t" in network
  89  *      byte order. This list is terminated by an "(uint32_t)0".
  90  *      Immediately after the terminating 0 follow the images, one by
  91  *      one, all aligned on "uint32_t" boundaries (size rounded up to
  92  *      a multiple of 4 bytes).
  93  *
  94  * "Firmware Images" are binary images containing firmware (like
  95  *      U-Boot or FPGA images) which usually will be programmed to
  96  *      flash memory.
  97  *
  98  * "Script files" are command sequences that will be executed by
  99  *      U-Boot's command interpreter; this feature is especially
 100  *      useful when you configure U-Boot to use a real shell (hush)
 101  *      as command interpreter.
 102  */
 103
 104 #define IH_TYPE_INVALID         0       /* Invalid Image                */
 105 #define IH_TYPE_STANDALONE      1       /* Standalone Program           */
 106 #define IH_TYPE_KERNEL          2       /* OS Kernel Image              */
 107 #define IH_TYPE_RAMDISK         3       /* RAMDisk Image                */
 108 #define IH_TYPE_MULTI           4       /* Multi-File Image             */
 109 #define IH_TYPE_FIRMWARE        5       /* Firmware Image               */
 110 #define IH_TYPE_SCRIPT          6       /* Script file                  */
 111
 112 /*
 113  * Compression Types
 114  */
 115 #define IH_COMP_NONE            0       /*  No   Compression Used       */
 116 #define IH_COMP_GZIP            1       /* gzip  Compression Used       */
 117 #define IH_COMP_BZIP2           2       /* bzip2 Compression Used       */
 118
 119 #define IH_MAGIC        0x27051956      /* Image Magic Number           */
 120 #define IH_NMLEN                32      /* Image Name Length            */
 121
 122 #ifdef __CYGWIN__
 123 typedef unsigned long uint32_t;
 124 typedef unsigned char uint8_t;
 125 #endif /* __CYGWIN__ */
 126
 127 /*
 128  * all data in network byte order (aka natural aka bigendian)
 129  */
 130
 131 typedef struct image_header {
 132         uint32_t        ih_magic;       /* Image Header Magic Number    */
 133         uint32_t        ih_hcrc;        /* Image Header CRC Checksum    */
 134         uint32_t        ih_time;        /* Image Creation Timestamp     */
 135         uint32_t        ih_size;        /* Image Data Size              */
 136         uint32_t        ih_load;        /* Data  Load  Address          */
 137         uint32_t        ih_ep;          /* Entry Point Address          */
 138         uint32_t        ih_dcrc;        /* Image Data CRC Checksum      */
 139         uint8_t         ih_os;          /* Operating System             */
 140         uint8_t         ih_arch;        /* CPU architecture             */
 141         uint8_t         ih_type;        /* Image Type                   */
 142         uint8_t         ih_comp;        /* Compression Type             */
 143         uint8_t         ih_name[IH_NMLEN];      /* Image Name           */
 144 } image_header_t;
 145
 146
 147 #endif  /* __IMAGE_H__ */