include/asm-microblaze/global_data.h

   1 /*
   2  * (C) Copyright 2004 Atmark Techno, Inc.
   3  *
   4  * Yasushi SHOJI <yashi@atmark-techno.com>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #ifndef __ASM_GBL_DATA_H
  26 #define __ASM_GBL_DATA_H
  27 /*
  28  * The following data structure is placed in some memory wich is
  29  * available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
  30  * some locked parts of the data cache) to allow for a minimum set of
  31  * global variables during system initialization (until we have set
  32  * up the memory controller so that we can use RAM).
  33  *
  34  * Keep it *SMALL* and remember to set CFG_GBL_DATA_SIZE > sizeof(gd_t)
  35  */
  36
  37 typedef struct  global_data {
  38         bd_t            *bd;
  39         unsigned long   flags;
  40         unsigned long   baudrate;
  41         unsigned long   have_console;   /* serial_init() was called */
  42         unsigned long   reloc_off;      /* Relocation Offset */
  43         unsigned long   env_addr;       /* Address  of Environment struct */
  44         unsigned long   env_valid;      /* Checksum of Environment valid? */
  45         unsigned long   fb_base;        /* base address of frame buffer */
  46         void            **jt;           /* jump table */
  47 } gd_t;
  48
  49 /*
  50  * Global Data Flags
  51  */
  52 #define GD_FLG_RELOC    0x00001         /* Code was relocated to RAM            */
  53 #define GD_FLG_DEVINIT  0x00002         /* Devices have been initialized        */
  54 #define GD_FLG_SILENT   0x00004         /* Silent mode                          */
  55 #define GD_FLG_POSTFAIL 0x00008         /* Critical POST test failed            */
  56
  57 #define DECLARE_GLOBAL_DATA_PTR     register volatile gd_t *gd asm ("r31")
  58
  59 #endif /* __ASM_GBL_DATA_H */