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 #ifndef __ASSEMBLY__ 37 38 typedef struct global_data { 39 bd_t *bd; 40 unsigned long flags; 41 unsigned long baudrate; 42 unsigned long have_console; /* serial_init() was called */ 43 unsigned long reloc_off; /* Relocation Offset */ 44 unsigned long load_off; /* Load Offset */ 45 unsigned long env_addr; /* Address of Environment struct */ 46 unsigned long env_valid; /* Checksum of Environment valid? */ 47 unsigned long cpu_clk; /* CPU clock in Hz! */ 48 unsigned long bus_clk; 49 unsigned long relocaddr; /* Start address of U-Boot in RAM */ 50 unsigned long start_addr_sp; /* start_addr_stackpointer */ 51 phys_size_t ram_size; /* RAM size */ 52 unsigned long reset_status; /* reset status register at boot */ 53 void **jt; /* jump table */ 54 char env_buf[32]; /* buffer for getenv() before reloc. */ 55 } gd_t; 56 57 extern gd_t *gd; 58 59 #endif 60 61 /* Word Offsets into Global Data - MUST match struct gd_t */ 62 #define GD_BD 0 63 #define GD_FLAGS 1 64 #define GD_BAUDRATE 2 65 #define GD_HAVE_CONSOLE 3 66 #define GD_RELOC_OFF 4 67 #define GD_LOAD_OFF 5 68 #define GD_ENV_ADDR 6 69 #define GD_ENV_VALID 7 70 #define GD_CPU_CLK 8 71 #define GD_BUS_CLK 9 72 #define GD_RELOC_ADDR 10 73 #define GD_START_ADDR_SP 11 74 #define GD_RAM_SIZE 12 75 #define GD_RESET_STATUS 13 76 #define GD_JT 14 77 78 #define GD_SIZE 15 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 #define GD_FLG_COLD_BOOT 0x00100 /* Cold Boot */ 92 #define GD_FLG_WARM_BOOT 0x00200 /* Warm Boot */ 93 94 #if 0 95 #define DECLARE_GLOBAL_DATA_PTR 96 #else 97 #define XTRN_DECLARE_GLOBAL_DATA_PTR extern 98 #define DECLARE_GLOBAL_DATA_PTR XTRN_DECLARE_GLOBAL_DATA_PTR \ 99 gd_t *gd 100 #endif 101 102 #endif /* __ASM_GBL_DATA_H */ 103