arch/arm/include/asm/global_data.h

   1 /*
   2  * (C) Copyright 2002-2010
   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 __ASM_GBL_DATA_H
  25 #define __ASM_GBL_DATA_H
  26 /*
  27  * The following data structure is placed in some memory wich is
  28  * available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
  29  * some locked parts of the data cache) to allow for a minimum set of
  30  * global variables during system initialization (until we have set
  31  * up the memory controller so that we can use RAM).
  32  *
  33  * Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
  34  */
  35
  36 typedef struct  global_data {
  37         bd_t            *bd;
  38         unsigned long   flags;
  39         unsigned long   baudrate;
  40         unsigned long   have_console;   /* serial_init() was called */
  41         unsigned long   env_addr;       /* Address  of Environment struct */
  42         unsigned long   env_valid;      /* Checksum of Environment valid? */
  43         unsigned long   fb_base;        /* base address of frame buffer */
  44 #ifdef CONFIG_VFD
  45         unsigned char   vfd_type;       /* display type */
  46 #endif
  47 #ifdef CONFIG_FSL_ESDHC
  48         unsigned long   sdhc_clk;
  49 #endif
  50 #ifdef CONFIG_AT91FAMILY
  51         /* "static data" needed by at91's clock.c */
  52         unsigned long   cpu_clk_rate_hz;
  53         unsigned long   main_clk_rate_hz;
  54         unsigned long   mck_rate_hz;
  55         unsigned long   plla_rate_hz;
  56         unsigned long   pllb_rate_hz;
  57         unsigned long   at91_pllb_usb_init;
  58 #endif
  59 #ifdef CONFIG_ARM
  60         /* "static data" needed by most of timer.c on ARM platforms */
  61         unsigned long   timer_rate_hz;
  62         unsigned long   tbl;
  63         unsigned long   tbu;
  64         unsigned long long      timer_reset_value;
  65         unsigned long   lastinc;
  66 #endif
  67         unsigned long   relocaddr;      /* Start address of U-Boot in RAM */
  68         phys_size_t     ram_size;       /* RAM size */
  69         unsigned long   mon_len;        /* monitor len */
  70         unsigned long   irq_sp;         /* irq stack pointer */
  71         unsigned long   start_addr_sp;  /* start_addr_stackpointer */
  72         unsigned long   reloc_off;
  73 #if !(defined(CONFIG_SYS_NO_ICACHE) && defined(CONFIG_SYS_NO_DCACHE))
  74         unsigned long   tlb_addr;
  75 #endif
  76         void            **jt;           /* jump table */
  77         char            env_buf[32];    /* buffer for getenv() before reloc. */
  78 } gd_t;
  79
  80 /*
  81  * Global Data Flags
  82  */
  83 #define GD_FLG_RELOC            0x00001 /* Code was relocated to RAM            */
  84 #define GD_FLG_DEVINIT          0x00002 /* Devices have been initialized        */
  85 #define GD_FLG_SILENT           0x00004 /* Silent mode                          */
  86 #define GD_FLG_POSTFAIL         0x00008 /* Critical POST test failed            */
  87 #define GD_FLG_POSTSTOP         0x00010 /* POST seqeunce aborted                */
  88 #define GD_FLG_LOGINIT          0x00020 /* Log Buffer has been initialized      */
  89 #define GD_FLG_DISABLE_CONSOLE  0x00040 /* Disable console (in & out)           */
  90 #define GD_FLG_ENV_READY        0x00080 /* Environment imported into hash table */
  91
  92 #define DECLARE_GLOBAL_DATA_PTR     register volatile gd_t *gd asm ("r8")
  93
  94 #endif /* __ASM_GBL_DATA_H */