1 /* 2 * (C) Copyright 2011 3 * Graeme Russ, <graeme.russ@gmail.com> 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 #include <common.h> 24 #include <command.h> 25 #include <stdio_dev.h> 26 #include <version.h> 27 #include <malloc.h> 28 #include <net.h> 29 #include <ide.h> 30 #include <serial.h> 31 #include <status_led.h> 32 #include <asm/processor.h> 33 #include <asm/u-boot-x86.h> 34 35 #include <asm/init_helpers.h> 36 37 DECLARE_GLOBAL_DATA_PTR; 38 39 /************************************************************************ 40 * Init Utilities * 41 ************************************************************************ 42 * Some of this code should be moved into the core functions, 43 * or dropped completely, 44 * but let's get it working (again) first... 45 */ 46 47 int display_banner(void) 48 { 49 printf("\n\n%s\n\n", version_string); 50 51 return 0; 52 } 53 54 int display_dram_config(void) 55 { 56 int i; 57 58 puts("DRAM Configuration:\n"); 59 60 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { 61 printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start); 62 print_size(gd->bd->bi_dram[i].size, "\n"); 63 } 64 65 return 0; 66 } 67 68 int init_baudrate_f(void) 69 { 70 gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE); 71 return 0; 72 } 73 74 int calculate_relocation_address(void) 75 { 76 ulong text_start = (ulong)&__text_start; 77 ulong bss_end = (ulong)&__bss_end; 78 ulong dest_addr; 79 80 /* 81 * NOTE: All destination address are rounded down to 16-byte 82 * boundary to satisfy various worst-case alignment 83 * requirements 84 */ 85 86 /* Global Data is at top of available memory */ 87 dest_addr = gd->ram_size; 88 dest_addr -= GENERATED_GBL_DATA_SIZE; 89 dest_addr &= ~15; 90 gd->new_gd_addr = dest_addr; 91 92 /* GDT is below Global Data */ 93 dest_addr -= X86_GDT_SIZE; 94 dest_addr &= ~15; 95 gd->gdt_addr = dest_addr; 96 97 /* Stack is below GDT */ 98 gd->start_addr_sp = dest_addr; 99 100 /* U-Boot is below the stack */ 101 dest_addr -= CONFIG_SYS_STACK_SIZE; 102 dest_addr -= (bss_end - text_start); 103 dest_addr &= ~15; 104 gd->relocaddr = dest_addr; 105 gd->reloc_off = (dest_addr - text_start); 106 107 return 0; 108 } 109 110 int copy_gd_to_ram_f_r(void) 111 { 112 gd_t *ram_gd; 113 114 /* 115 * Global data is still in temporary memory (the CPU cache). 116 * calculate_relocation_address() has set gd->new_gd_addr to 117 * where the global data lives in RAM but getting it there 118 * safely is a bit tricky due to the 'F-Segment Hack' that 119 * we need to use for x86 120 */ 121 ram_gd = (gd_t *)gd->new_gd_addr; 122 memcpy((void *)ram_gd, gd, sizeof(gd_t)); 123 124 /* 125 * Reload the Global Descriptor Table so FS points to the 126 * in-RAM copy of Global Data (calculate_relocation_address() 127 * has already calculated the in-RAM location of the GDT) 128 */ 129 ram_gd->gd_addr = (ulong)ram_gd; 130 init_gd(ram_gd, (u64 *)gd->gdt_addr); 131 132 return 0; 133 } 134 135 int init_cache_f_r(void) 136 { 137 /* Initialise the CPU cache(s) */ 138 return init_cache(); 139 } 140 141 int set_reloc_flag_r(void) 142 { 143 gd->flags = GD_FLG_RELOC; 144 145 return 0; 146 } 147 148 int mem_malloc_init_r(void) 149 { 150 mem_malloc_init(((gd->relocaddr - CONFIG_SYS_MALLOC_LEN)+3)&~3, 151 CONFIG_SYS_MALLOC_LEN); 152 153 return 0; 154 } 155 156 bd_t bd_data; 157 158 int init_bd_struct_r(void) 159 { 160 gd->bd = &bd_data; 161 memset(gd->bd, 0, sizeof(bd_t)); 162 163 return 0; 164 } 165 166 #ifndef CONFIG_SYS_NO_FLASH 167 int flash_init_r(void) 168 { 169 ulong size; 170 171 puts("Flash: "); 172 173 /* configure available FLASH banks */ 174 size = flash_init(); 175 176 print_size(size, "\n"); 177 178 return 0; 179 } 180 #endif 181 182 #ifdef CONFIG_STATUS_LED 183 int status_led_set_r(void) 184 { 185 status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING); 186 187 return 0; 188 } 189 #endif 190 191 int set_load_addr_r(void) 192 { 193 /* Initialize from environment */ 194 load_addr = getenv_ulong("loadaddr", 16, load_addr); 195 196 return 0; 197 } 198