summaryrefslogtreecommitdiff
path: root/arch/mips/lib/board.c
blob: f19f198ae98eab8f4069727d94cdc8141eb0c201 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
/*
 * (C) Copyright 2003
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <command.h>
#include <malloc.h>
#include <serial.h>
#include <stdio_dev.h>
#include <version.h>
#include <net.h>
#include <environment.h>
#include <nand.h>
#include <onenand_uboot.h>
#include <spi.h>

#ifdef CONFIG_BITBANGMII
#include <miiphy.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

ulong monitor_flash_len;

static char *failed = "*** failed ***\n";

/*
 * mips_io_port_base is the begin of the address space to which x86 style
 * I/O ports are mapped.
 */
const unsigned long mips_io_port_base = -1;

int __board_early_init_f(void)
{
	/*
	 * Nothing to do in this dummy implementation
	 */
	return 0;
}
int board_early_init_f(void)
	__attribute__((weak, alias("__board_early_init_f")));

static int init_func_ram(void)
{
#ifdef	CONFIG_BOARD_TYPES
	int board_type = gd->board_type;
#else
	int board_type = 0;	/* use dummy arg */
#endif
	puts("DRAM:  ");

	gd->ram_size = initdram(board_type);
	if (gd->ram_size > 0) {
		print_size(gd->ram_size, "\n");
		return 0;
	}
	puts(failed);
	return 1;
}

static int display_banner(void)
{

	printf("\n\n%s\n\n", version_string);
	return 0;
}

#ifndef CONFIG_SYS_NO_FLASH
static void display_flash_config(ulong size)
{
	puts("Flash: ");
	print_size(size, "\n");
}
#endif

static int init_baudrate(void)
{
	gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
	return 0;
}


/*
 * Breath some life into the board...
 *
 * The first part of initialization is running from Flash memory;
 * its main purpose is to initialize the RAM so that we
 * can relocate the monitor code to RAM.
 */

/*
 * All attempts to come up with a "common" initialization sequence
 * that works for all boards and architectures failed: some of the
 * requirements are just _too_ different. To get rid of the resulting
 * mess of board dependend #ifdef'ed code we now make the whole
 * initialization sequence configurable to the user.
 *
 * The requirements for any new initalization function is simple: it
 * receives a pointer to the "global data" structure as it's only
 * argument, and returns an integer return code, where 0 means
 * "continue" and != 0 means "fatal error, hang the system".
 */
typedef int (init_fnc_t)(void);

init_fnc_t *init_sequence[] = {
	board_early_init_f,
	timer_init,
	env_init,		/* initialize environment */
#ifdef CONFIG_INCA_IP
	incaip_set_cpuclk,	/* set cpu clock according to env. variable */
#endif
	init_baudrate,		/* initialize baudrate settings */
	serial_init,		/* serial communications setup */
	console_init_f,
	display_banner,		/* say that we are here */
	checkboard,
	init_func_ram,
	NULL,
};


void board_init_f(ulong bootflag)
{
	gd_t gd_data, *id;
	bd_t *bd;
	init_fnc_t **init_fnc_ptr;
	ulong addr, addr_sp, len;
	ulong *s;

	/* Pointer is writable since we allocated a register for it.
	 */
	gd = &gd_data;
	/* compiler optimization barrier needed for GCC >= 3.4 */
	__asm__ __volatile__("" : : : "memory");

	memset((void *)gd, 0, sizeof(gd_t));

	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
		if ((*init_fnc_ptr)() != 0)
			hang();
	}

	/*
	 * Now that we have DRAM mapped and working, we can
	 * relocate the code and continue running from DRAM.
	 */
	addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;

	/* We can reserve some RAM "on top" here.
	 */

	/* round down to next 4 kB limit.
	 */
	addr &= ~(4096 - 1);
	debug("Top of RAM usable for U-Boot at: %08lx\n", addr);

	/* Reserve memory for U-Boot code, data & bss
	 * round down to next 16 kB limit
	 */
	len = bss_end() - CONFIG_SYS_MONITOR_BASE;
	addr -= len;
	addr &= ~(16 * 1024 - 1);

	debug("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);

	 /* Reserve memory for malloc() arena.
	 */
	addr_sp = addr - TOTAL_MALLOC_LEN;
	debug("Reserving %dk for malloc() at: %08lx\n",
			TOTAL_MALLOC_LEN >> 10, addr_sp);

	/*
	 * (permanently) allocate a Board Info struct
	 * and a permanent copy of the "global" data
	 */
	addr_sp -= sizeof(bd_t);
	bd = (bd_t *)addr_sp;
	gd->bd = bd;
	debug("Reserving %zu Bytes for Board Info at: %08lx\n",
			sizeof(bd_t), addr_sp);

	addr_sp -= sizeof(gd_t);
	id = (gd_t *)addr_sp;
	debug("Reserving %zu Bytes for Global Data at: %08lx\n",
			sizeof(gd_t), addr_sp);

	/* Reserve memory for boot params.
	 */
	addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
	bd->bi_boot_params = addr_sp;
	debug("Reserving %dk for boot params() at: %08lx\n",
			CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);

	/*
	 * Finally, we set up a new (bigger) stack.
	 *
	 * Leave some safety gap for SP, force alignment on 16 byte boundary
	 * Clear initial stack frame
	 */
	addr_sp -= 16;
	addr_sp &= ~0xF;
	s = (ulong *)addr_sp;
	*s-- = 0;
	*s-- = 0;
	addr_sp = (ulong)s;
	debug("Stack Pointer at: %08lx\n", addr_sp);

	/*
	 * Save local variables to board info struct
	 */
	bd->bi_memstart	= CONFIG_SYS_SDRAM_BASE;	/* start of DRAM */
	bd->bi_memsize	= gd->ram_size;		/* size of DRAM in bytes */
	bd->bi_baudrate	= gd->baudrate;		/* Console Baudrate */

	memcpy(id, (void *)gd, sizeof(gd_t));

	relocate_code(addr_sp, id, addr);

	/* NOTREACHED - relocate_code() does not return */
}

/*
 * This is the next part if the initialization sequence: we are now
 * running from RAM and have a "normal" C environment, i. e. global
 * data can be written, BSS has been cleared, the stack size in not
 * that critical any more, etc.
 */

void board_init_r(gd_t *id, ulong dest_addr)
{
#ifndef CONFIG_SYS_NO_FLASH
	ulong size;
#endif
	bd_t *bd;

	gd = id;
	gd->flags |= GD_FLG_RELOC;	/* tell others: relocation done */

	debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);

	gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;

	monitor_flash_len = image_copy_end() - dest_addr;

	serial_initialize();

	bd = gd->bd;

	/* The Malloc area is immediately below the monitor copy in DRAM */
	mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
			TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);

#ifndef CONFIG_SYS_NO_FLASH
	/* configure available FLASH banks */
	size = flash_init();
	display_flash_config(size);
	bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
	bd->bi_flashsize = size;

#if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
	bd->bi_flashoffset = monitor_flash_len;	/* reserved area for U-Boot */
#else
	bd->bi_flashoffset = 0;
#endif
#else
	bd->bi_flashstart = 0;
	bd->bi_flashsize = 0;
	bd->bi_flashoffset = 0;
#endif

#ifdef CONFIG_CMD_NAND
	puts("NAND:  ");
	nand_init();		/* go init the NAND */
#endif

#if defined(CONFIG_CMD_ONENAND)
	onenand_init();
#endif

	/* relocate environment function pointers etc. */
	env_relocate();

#if defined(CONFIG_PCI)
	/*
	 * Do pci configuration
	 */
	pci_init();
#endif

/** leave this here (after malloc(), environment and PCI are working) **/
	/* Initialize stdio devices */
	stdio_init();

	jumptable_init();

	/* Initialize the console (after the relocation and devices init) */
	console_init_r();
/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/

	/* Initialize from environment */
	load_addr = getenv_ulong("loadaddr", 16, load_addr);

#ifdef CONFIG_CMD_SPI
	puts("SPI:   ");
	spi_init();		/* go init the SPI */
	puts("ready\n");
#endif

#if defined(CONFIG_MISC_INIT_R)
	/* miscellaneous platform dependent initialisations */
	misc_init_r();
#endif

#ifdef CONFIG_BITBANGMII
	bb_miiphy_init();
#endif
#if defined(CONFIG_CMD_NET)
	puts("Net:   ");
	eth_initialize(gd->bd);
#endif

	/* main_loop() can return to retry autoboot, if so just run it again. */
	for (;;)
		main_loop();

	/* NOTREACHED - no way out of command loop except booting */
}

void hang(void)
{
	puts("### ERROR ### Please RESET the board ###\n");
	for (;;)
		;
}