arch/xtensa/include/asm/bootparam.h

   1 /*
   2  * include/asm-xtensa/bootparam.h
   3  *
   4  * Definition of the Linux/Xtensa boot parameter structure
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  *
  10  * Copyright (C) 2001 - 2005  Tensilica Inc.
  11  *
  12  * (Concept borrowed from the 68K port)
  13  */
  14
  15 #ifndef _XTENSA_BOOTPARAM_H
  16 #define _XTENSA_BOOTPARAM_H
  17
  18 #define BP_VERSION 0x0001
  19
  20 #define BP_TAG_COMMAND_LINE     0x1001  /* command line (0-terminated string)*/
  21 #define BP_TAG_INITRD           0x1002  /* ramdisk addr and size (bp_meminfo) */
  22 #define BP_TAG_MEMORY           0x1003  /* memory addr and size (bp_meminfo) */
  23 #define BP_TAG_SERIAL_BAUSRATE  0x1004  /* baud rate of current console. */
  24 #define BP_TAG_SERIAL_PORT      0x1005  /* serial device of current console */
  25
  26 #define BP_TAG_FIRST            0x7B0B  /* first tag with a version number */
  27 #define BP_TAG_LAST             0x7E0B  /* last tag */
  28
  29 #ifndef __ASSEMBLY__
  30
  31 /* All records are aligned to 4 bytes */
  32
  33 typedef struct bp_tag {
  34   unsigned short id;            /* tag id */
  35   unsigned short size;          /* size of this record excluding the structure*/
  36   unsigned long data[0];        /* data */
  37 } bp_tag_t;
  38
  39 typedef struct meminfo {
  40   unsigned long type;
  41   unsigned long start;
  42   unsigned long end;
  43 } meminfo_t;
  44
  45 #define SYSMEM_BANKS_MAX 5
  46
  47 #define MEMORY_TYPE_CONVENTIONAL        0x1000
  48 #define MEMORY_TYPE_NONE                0x2000
  49
  50 typedef struct sysmem_info {
  51   int nr_banks;
  52   meminfo_t bank[SYSMEM_BANKS_MAX];
  53 } sysmem_info_t;
  54
  55 extern sysmem_info_t sysmem;
  56
  57 #endif
  58 #endif
  59
  60
  61