2 * Copyright (c) 2011 The Chromium OS Authors.
4 * (C) Copyright 2002-2006
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
9 * Marius Groeger <mgroeger@sysgo.de>
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 * This file was taken from ARM and changed to remove things we don't
32 * need. This is most of it, so have tried to avoid being over-zealous!
33 * For example, we want to have an emulation of the 'DRAM' used by
36 * has been talk upstream of unifying the architectures w.r.t board.c,
37 * so the less change here the better.
43 #include <stdio_dev.h>
44 #include <timestamp.h>
50 DECLARE_GLOBAL_DATA_PTR;
54 /************************************************************************
56 ************************************************************************
57 * Some of this code should be moved into the core functions,
58 * or dropped completely,
59 * but let's get it working (again) first...
62 static int display_banner(void)
70 * Configure and report on the DRAM configuration, which in our case is
73 static int display_dram_config(void)
78 debug("RAM Configuration:\n");
80 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
82 printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
83 print_size(gd->bd->bi_dram[i].size, "\n");
85 size += gd->bd->bi_dram[i].size;
88 print_size(size, "\n");
93 * Breathe some life into the board...
95 * Initialize a serial port as console, and carry out some hardware
98 * The first part of initialization is running from Flash memory;
99 * its main purpose is to initialize the RAM so that we
100 * can relocate the monitor code to RAM.
104 * All attempts to come up with a "common" initialization sequence
105 * that works for all boards and architectures failed: some of the
106 * requirements are just _too_ different. To get rid of the resulting
107 * mess of board dependent #ifdef'ed code we now make the whole
108 * initialization sequence configurable to the user.
110 * The requirements for any new initalization function is simple: it
111 * receives a pointer to the "global data" structure as it's only
112 * argument, and returns an integer return code, where 0 means
113 * "continue" and != 0 means "fatal error, hang the system".
115 typedef int (init_fnc_t) (void);
117 void __dram_init_banksize(void)
119 gd->bd->bi_dram[0].start = 0;
120 gd->bd->bi_dram[0].size = gd->ram_size;
123 void dram_init_banksize(void)
124 __attribute__((weak, alias("__dram_init_banksize")));
126 init_fnc_t *init_sequence[] = {
127 #if defined(CONFIG_ARCH_CPU_INIT)
128 arch_cpu_init, /* basic arch cpu dependent setup */
130 #if defined(CONFIG_BOARD_EARLY_INIT_F)
133 timer_init, /* initialize timer */
134 env_init, /* initialize environment */
135 serial_init, /* serial communications setup */
136 console_init_f, /* stage 1 init of console */
137 display_banner, /* say that we are here */
138 #if defined(CONFIG_DISPLAY_CPUINFO)
139 print_cpuinfo, /* display cpu info (and speed) */
141 #if defined(CONFIG_DISPLAY_BOARDINFO)
142 checkboard, /* display board info */
144 dram_init, /* configure available RAM banks */
148 void board_init_f(ulong bootflag)
150 init_fnc_t **init_fnc_ptr;
152 unsigned long addr_sp, addr, size;
157 memset((void *)gd, 0, sizeof(gd_t));
159 #if defined(CONFIG_OF_EMBED)
160 /* Get a pointer to the FDT */
161 gd->fdt_blob = _binary_dt_dtb_start;
162 #elif defined(CONFIG_OF_SEPARATE)
163 /* FDT is at end of image */
164 gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE);
167 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
168 if ((*init_fnc_ptr)() != 0)
172 size = CONFIG_SYS_SDRAM_SIZE;
173 mem = os_malloc(CONFIG_SYS_SDRAM_SIZE);
177 addr = (ulong)(mem + size);
180 * reserve memory for malloc() arena
182 addr_sp = addr - TOTAL_MALLOC_LEN;
183 debug("Reserving %dk for malloc() at: %08lx\n",
184 TOTAL_MALLOC_LEN >> 10, addr_sp);
186 * (permanently) allocate a Board Info struct
187 * and a permanent copy of the "global" data
189 addr_sp -= sizeof(bd_t);
190 gd->bd = (bd_t *) addr_sp;
191 debug("Reserving %zu Bytes for Board Info at: %08lx\n",
192 sizeof(bd_t), addr_sp);
194 /* Ram ist board specific, so move it to board code ... */
195 dram_init_banksize();
196 display_dram_config(); /* and display it */
198 /* We don't relocate, so just run the post-relocation code */
199 board_init_r(NULL, 0);
201 /* NOTREACHED - no way out of command loop except booting */
204 /************************************************************************
206 * This is the next part if the initialization sequence: we are now
207 * running from RAM and have a "normal" C environment, i. e. global
208 * data can be written, BSS has been cleared, the stack size in not
209 * that critical any more, etc.
211 ************************************************************************
214 void board_init_r(gd_t *id, ulong dest_addr)
220 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
222 #ifdef CONFIG_SERIAL_MULTI
227 post_output_backlog();
230 /* The Malloc area is at the top of simulated DRAM */
231 mem_malloc_init((ulong)gd->ram_buf + gd->ram_size - TOTAL_MALLOC_LEN,
234 /* initialize environment */
238 gd->bd->bi_ip_addr = getenv_IPaddr("ipaddr");
240 stdio_init(); /* get the devices list going. */
244 console_init_r(); /* fully init console as a device */
246 #if defined(CONFIG_DISPLAY_BOARDINFO_LATE)
250 #if defined(CONFIG_ARCH_MISC_INIT)
251 /* miscellaneous arch dependent initialisations */
254 #if defined(CONFIG_MISC_INIT_R)
255 /* miscellaneous platform dependent initialisations */
259 /* set up exceptions */
261 /* enable exceptions */
264 #ifdef CONFIG_BOARD_LATE_INIT
269 post_run(NULL, POST_RAM | post_bootmode_get(0));
272 sandbox_main_loop_init();
275 * For now, run the main loop. Later we might let this be done
276 * in the main program.
281 /* NOTREACHED - no way out of command loop except booting */
286 puts("### ERROR ### Please RESET the board ###\n");