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>
48 DECLARE_GLOBAL_DATA_PTR;
50 /************************************************************************
52 ************************************************************************
53 * Some of this code should be moved into the core functions,
54 * or dropped completely,
55 * but let's get it working (again) first...
58 static int display_banner(void)
66 * Configure and report on the DRAM configuration, which in our case is
69 static int display_dram_config(void)
74 debug("RAM Configuration:\n");
76 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
78 printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
79 print_size(gd->bd->bi_dram[i].size, "\n");
81 size += gd->bd->bi_dram[i].size;
84 print_size(size, "\n");
89 * Breathe some life into the board...
91 * Initialize a serial port as console, and carry out some hardware
94 * The first part of initialization is running from Flash memory;
95 * its main purpose is to initialize the RAM so that we
96 * can relocate the monitor code to RAM.
100 * All attempts to come up with a "common" initialization sequence
101 * that works for all boards and architectures failed: some of the
102 * requirements are just _too_ different. To get rid of the resulting
103 * mess of board dependent #ifdef'ed code we now make the whole
104 * initialization sequence configurable to the user.
106 * The requirements for any new initalization function is simple: it
107 * receives a pointer to the "global data" structure as it's only
108 * argument, and returns an integer return code, where 0 means
109 * "continue" and != 0 means "fatal error, hang the system".
111 typedef int (init_fnc_t) (void);
113 void __dram_init_banksize(void)
115 gd->bd->bi_dram[0].start = 0;
116 gd->bd->bi_dram[0].size = gd->ram_size;
119 void dram_init_banksize(void)
120 __attribute__((weak, alias("__dram_init_banksize")));
122 init_fnc_t *init_sequence[] = {
123 #if defined(CONFIG_ARCH_CPU_INIT)
124 arch_cpu_init, /* basic arch cpu dependent setup */
126 #if defined(CONFIG_BOARD_EARLY_INIT_F)
129 timer_init, /* initialize timer */
130 env_init, /* initialize environment */
131 serial_init, /* serial communications setup */
132 console_init_f, /* stage 1 init of console */
133 display_banner, /* say that we are here */
134 #if defined(CONFIG_DISPLAY_CPUINFO)
135 print_cpuinfo, /* display cpu info (and speed) */
137 #if defined(CONFIG_DISPLAY_BOARDINFO)
138 checkboard, /* display board info */
140 dram_init, /* configure available RAM banks */
144 void board_init_f(ulong bootflag)
146 init_fnc_t **init_fnc_ptr;
148 unsigned long addr_sp, addr, size;
150 gd = malloc(sizeof(gd_t));
153 memset((void *)gd, 0, sizeof(gd_t));
155 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
156 if ((*init_fnc_ptr)() != 0)
160 size = CONFIG_SYS_SDRAM_SIZE;
164 addr = (ulong)(mem + size);
167 * reserve memory for malloc() arena
169 addr_sp = addr - TOTAL_MALLOC_LEN;
170 debug("Reserving %dk for malloc() at: %08lx\n",
171 TOTAL_MALLOC_LEN >> 10, addr_sp);
173 * (permanently) allocate a Board Info struct
174 * and a permanent copy of the "global" data
176 addr_sp -= sizeof(bd_t);
177 gd->bd = (bd_t *) addr_sp;
178 debug("Reserving %zu Bytes for Board Info at: %08lx\n",
179 sizeof(bd_t), addr_sp);
181 /* Ram ist board specific, so move it to board code ... */
182 dram_init_banksize();
183 display_dram_config(); /* and display it */
185 /* We don't relocate, so just run the post-relocation code */
186 board_init_r(NULL, 0);
188 /* NOTREACHED - no way out of command loop except booting */
191 /************************************************************************
193 * This is the next part if the initialization sequence: we are now
194 * running from RAM and have a "normal" C environment, i. e. global
195 * data can be written, BSS has been cleared, the stack size in not
196 * that critical any more, etc.
198 ************************************************************************
201 void board_init_r(gd_t *id, ulong dest_addr)
207 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
209 #ifdef CONFIG_SERIAL_MULTI
214 post_output_backlog();
217 #if 0 /* Sandbox uses system malloc for now */
218 /* The Malloc area is immediately below the monitor copy in DRAM */
219 malloc_start = dest_addr - TOTAL_MALLOC_LEN;
220 mem_malloc_init(malloc_start, TOTAL_MALLOC_LEN);
223 /* initialize environment */
227 gd->bd->bi_ip_addr = getenv_IPaddr("ipaddr");
229 stdio_init(); /* get the devices list going. */
233 console_init_r(); /* fully init console as a device */
235 #if defined(CONFIG_DISPLAY_BOARDINFO_LATE)
239 #if defined(CONFIG_ARCH_MISC_INIT)
240 /* miscellaneous arch dependent initialisations */
243 #if defined(CONFIG_MISC_INIT_R)
244 /* miscellaneous platform dependent initialisations */
248 /* set up exceptions */
250 /* enable exceptions */
253 #ifdef BOARD_LATE_INIT
258 post_run(NULL, POST_RAM | post_bootmode_get(0));
262 * For now, run the main loop. Later we might let this be done
263 * in the main program.
268 /* NOTREACHED - no way out of command loop except booting */
273 puts("### ERROR ### Please RESET the board ###\n");