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 #ifdef CONFIG_PRE_CONSOLE_BUFFER 44 unsigned long precon_buf_idx; /* Pre-Console buffer index */ 45 #endif 46 unsigned long reloc_off; /* Relocation Offset */ 47 unsigned long load_off; /* Load Offset */ 48 unsigned long env_addr; /* Address of Environment struct */ 49 unsigned long env_valid; /* Checksum of Environment valid? */ 50 unsigned long cpu_clk; /* CPU clock in Hz! */ 51 unsigned long bus_clk; 52 unsigned long relocaddr; /* Start address of U-Boot in RAM */ 53 unsigned long start_addr_sp; /* start_addr_stackpointer */ 54 phys_size_t ram_size; /* RAM size */ 55 unsigned long reset_status; /* reset status register at boot */ 56 void **jt; /* jump table */ 57 char env_buf[32]; /* buffer for getenv() before reloc. */ 58 } gd_t; 59 60 extern gd_t *gd; 61 62 #endif 63 64 /* Word Offsets into Global Data - MUST match struct gd_t */ 65 #define GD_BD 0 66 #define GD_FLAGS 1 67 #define GD_BAUDRATE 2 68 #define GD_HAVE_CONSOLE 3 69 #define GD_RELOC_OFF 4 70 #define GD_LOAD_OFF 5 71 #define GD_ENV_ADDR 6 72 #define GD_ENV_VALID 7 73 #define GD_CPU_CLK 8 74 #define GD_BUS_CLK 9 75 #define GD_RELOC_ADDR 10 76 #define GD_START_ADDR_SP 11 77 #define GD_RAM_SIZE 12 78 #define GD_RESET_STATUS 13 79 #define GD_JT 14 80 81 #define GD_SIZE 15 82 83 /* 84 * Global Data Flags 85 */ 86 #define GD_FLG_RELOC 0x00001 /* Code was relocated to RAM */ 87 #define GD_FLG_DEVINIT 0x00002 /* Devices have been initialized */ 88 #define GD_FLG_SILENT 0x00004 /* Silent mode */ 89 #define GD_FLG_POSTFAIL 0x00008 /* Critical POST test failed */ 90 #define GD_FLG_POSTSTOP 0x00010 /* POST seqeunce aborted */ 91 #define GD_FLG_LOGINIT 0x00020 /* Log Buffer has been initialized */ 92 #define GD_FLG_DISABLE_CONSOLE 0x00040 /* Disable console (in & out) */ 93 #define GD_FLG_ENV_READY 0x00080 /* Environment imported into hash table */ 94 #define GD_FLG_COLD_BOOT 0x00100 /* Cold Boot */ 95 #define GD_FLG_WARM_BOOT 0x00200 /* Warm Boot */ 96 97 #if 0 98 #define DECLARE_GLOBAL_DATA_PTR 99 #else 100 #define XTRN_DECLARE_GLOBAL_DATA_PTR extern 101 #define DECLARE_GLOBAL_DATA_PTR XTRN_DECLARE_GLOBAL_DATA_PTR \ 102 gd_t *gd 103 #endif 104 105 #endif /* __ASM_GBL_DATA_H */ 106