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 34 #ifndef __ASSEMBLY__ 35 36 typedef struct global_data { 37 /* NOTE: gd_addr MUST be first member of struct global_data! */ 38 unsigned long gd_addr; /* Location of 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 unsigned long gdt_addr; /* Location of GDT */ 55 unsigned long new_gd_addr; /* New location of Global Data */ 56 phys_size_t ram_size; /* RAM size */ 57 unsigned long reset_status; /* reset status register at boot */ 58 void **jt; /* jump table */ 59 char env_buf[32]; /* buffer for getenv() before reloc. */ 60 } gd_t; 61 62 static inline gd_t *get_fs_gd_ptr(void) 63 { 64 gd_t *gd_ptr; 65 66 asm volatile("fs movl 0, %0\n" : "=r" (gd_ptr)); 67 68 return gd_ptr; 69 } 70 71 #define gd get_fs_gd_ptr() 72 73 #endif 74 75 #include <asm-generic/global_data_flags.h> 76 77 #define DECLARE_GLOBAL_DATA_PTR 78 79 #endif /* __ASM_GBL_DATA_H */ 80