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 /* NOTE: gd_addr MUST be first member of struct global_data! */ 40 unsigned long gd_addr; /* Location of Global Data */ 41 bd_t *bd; 42 unsigned long flags; 43 unsigned long baudrate; 44 unsigned long have_console; /* serial_init() was called */ 45 #ifdef CONFIG_PRE_CONSOLE_BUFFER 46 unsigned long precon_buf_idx; /* Pre-Console buffer index */ 47 #endif 48 unsigned long reloc_off; /* Relocation Offset */ 49 unsigned long load_off; /* Load Offset */ 50 unsigned long env_addr; /* Address of Environment struct */ 51 unsigned long env_valid; /* Checksum of Environment valid? */ 52 unsigned long cpu_clk; /* CPU clock in Hz! */ 53 unsigned long bus_clk; 54 unsigned long relocaddr; /* Start address of U-Boot in RAM */ 55 unsigned long start_addr_sp; /* start_addr_stackpointer */ 56 unsigned long gdt_addr; /* Location of GDT */ 57 unsigned long new_gd_addr; /* New location of Global Data */ 58 phys_size_t ram_size; /* RAM size */ 59 unsigned long reset_status; /* reset status register at boot */ 60 void **jt; /* jump table */ 61 char env_buf[32]; /* buffer for getenv() before reloc. */ 62 } gd_t; 63 64 static inline gd_t *get_fs_gd_ptr(void) 65 { 66 gd_t *gd_ptr; 67 68 asm volatile("fs movl 0, %0\n" : "=r" (gd_ptr)); 69 70 return gd_ptr; 71 } 72 73 #define gd get_fs_gd_ptr() 74 75 #endif 76 77 /* 78 * Global Data Flags 79 */ 80 #define GD_FLG_RELOC 0x00001 /* Code was relocated to RAM */ 81 #define GD_FLG_DEVINIT 0x00002 /* Devices have been initialized */ 82 #define GD_FLG_SILENT 0x00004 /* Silent mode */ 83 #define GD_FLG_POSTFAIL 0x00008 /* Critical POST test failed */ 84 #define GD_FLG_POSTSTOP 0x00010 /* POST seqeunce aborted */ 85 #define GD_FLG_LOGINIT 0x00020 /* Log Buffer has been initialized */ 86 #define GD_FLG_DISABLE_CONSOLE 0x00040 /* Disable console (in & out) */ 87 #define GD_FLG_ENV_READY 0x00080 /* Environment imported into hash table */ 88 89 #define DECLARE_GLOBAL_DATA_PTR 90 91 #endif /* __ASM_GBL_DATA_H */ 92