summaryrefslogtreecommitdiff
path: root/common/spl/spl.c
blob: 93f9bd13fcd9b4995c2d69fa3293180f3a48bedc (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
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
/*
 * (C) Copyright 2010
 * Texas Instruments, <www.ti.com>
 *
 * Aneesh V <aneesh@ti.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
#include <common.h>
#include <dm.h>
#include <spl.h>
#include <asm/u-boot.h>
#include <nand.h>
#include <fat.h>
#include <version.h>
#include <i2c.h>
#include <image.h>
#include <malloc.h>
#include <dm/root.h>
#include <linux/compiler.h>

DECLARE_GLOBAL_DATA_PTR;

#ifndef CONFIG_SYS_UBOOT_START
#define CONFIG_SYS_UBOOT_START	CONFIG_SYS_TEXT_BASE
#endif
#ifndef CONFIG_SYS_MONITOR_LEN
/* Unknown U-Boot size, let's assume it will not be more than 200 KB */
#define CONFIG_SYS_MONITOR_LEN	(200 * 1024)
#endif

u32 *boot_params_ptr = NULL;
struct spl_image_info spl_image;

/* Define board data structure */
static bd_t bdata __attribute__ ((section(".data")));

/*
 * Default function to determine if u-boot or the OS should
 * be started. This implementation always returns 1.
 *
 * Please implement your own board specific funcion to do this.
 *
 * RETURN
 * 0 to not start u-boot
 * positive if u-boot should start
 */
#ifdef CONFIG_SPL_OS_BOOT
__weak int spl_start_uboot(void)
{
	puts("SPL: Please implement spl_start_uboot() for your board\n");
	puts("SPL: Direct Linux boot not active!\n");
	return 1;
}
#endif

/*
 * Weak default function for board specific cleanup/preparation before
 * Linux boot. Some boards/platforms might not need it, so just provide
 * an empty stub here.
 */
__weak void spl_board_prepare_for_linux(void)
{
	/* Nothing to do! */
}

void spl_set_header_raw_uboot(void)
{
	spl_image.size = CONFIG_SYS_MONITOR_LEN;
	spl_image.entry_point = CONFIG_SYS_UBOOT_START;
	spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
	spl_image.os = IH_OS_U_BOOT;
	spl_image.name = "U-Boot";
}

int spl_parse_image_header(const struct image_header *header)
{
	u32 header_size = sizeof(struct image_header);

	if (image_get_magic(header) == IH_MAGIC) {
		if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) {
			/*
			 * On some system (e.g. powerpc), the load-address and
			 * entry-point is located at address 0. We can't load
			 * to 0-0x40. So skip header in this case.
			 */
			spl_image.load_addr = image_get_load(header);
			spl_image.entry_point = image_get_ep(header);
			spl_image.size = image_get_data_size(header);
		} else {
			spl_image.entry_point = image_get_load(header);
			/* Load including the header */
			spl_image.load_addr = spl_image.entry_point -
				header_size;
			spl_image.size = image_get_data_size(header) +
				header_size;
		}
		spl_image.os = image_get_os(header);
		spl_image.name = image_get_name(header);
		debug("spl: payload image: %.*s load addr: 0x%x size: %d\n",
			(int)sizeof(spl_image.name), spl_image.name,
			spl_image.load_addr, spl_image.size);
	} else {
#ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE
		/*
		 * CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the
		 * code which loads images in SPL cannot guarantee that
		 * absolutely all read errors will be reported.
		 * An example is the LPC32XX MLC NAND driver, which
		 * will consider that a completely unreadable NAND block
		 * is bad, and thus should be skipped silently.
		 */
		panic("** no mkimage signature but raw image not supported");
#elif defined(CONFIG_SPL_ABORT_ON_RAW_IMAGE)
		/* Signature not found, proceed to other boot methods. */
		return -EINVAL;
#else
		/* Signature not found - assume u-boot.bin */
		debug("mkimage signature not found - ih_magic = %x\n",
			header->ih_magic);
		spl_set_header_raw_uboot();
#endif
	}
	return 0;
}

__weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
{
	typedef void __noreturn (*image_entry_noargs_t)(void);

	image_entry_noargs_t image_entry =
		(image_entry_noargs_t)(unsigned long)spl_image->entry_point;

	debug("image entry point: 0x%X\n", spl_image->entry_point);
	image_entry();
}

#ifdef CONFIG_SPL_RAM_DEVICE
static int spl_ram_load_image(void)
{
	const struct image_header *header;

	/*
	 * Get the header.  It will point to an address defined by handoff
	 * which will tell where the image located inside the flash. For
	 * now, it will temporary fixed to address pointed by U-Boot.
	 */
	header = (struct image_header *)
		(CONFIG_SYS_TEXT_BASE -	sizeof(struct image_header));

	spl_parse_image_header(header);

	return 0;
}
#endif

int spl_init(void)
{
	int ret;

	debug("spl_init()\n");
#if defined(CONFIG_SYS_MALLOC_F_LEN)
	gd->malloc_limit = CONFIG_SYS_MALLOC_F_LEN;
	gd->malloc_ptr = 0;
#endif
	if (CONFIG_IS_ENABLED(OF_CONTROL)) {
		ret = fdtdec_setup();
		if (ret) {
			debug("fdtdec_setup() returned error %d\n", ret);
			return ret;
		}
	}
	if (IS_ENABLED(CONFIG_SPL_DM)) {
		ret = dm_init_and_scan(true);
		if (ret) {
			debug("dm_init_and_scan() returned error %d\n", ret);
			return ret;
		}
	}
	gd->flags |= GD_FLG_SPL_INIT;

	return 0;
}

#ifndef BOOT_DEVICE_NONE
#define BOOT_DEVICE_NONE 0xdeadbeef
#endif

static u32 spl_boot_list[] = {
	BOOT_DEVICE_NONE,
	BOOT_DEVICE_NONE,
	BOOT_DEVICE_NONE,
	BOOT_DEVICE_NONE,
	BOOT_DEVICE_NONE,
};

__weak void board_boot_order(u32 *spl_boot_list)
{
	spl_boot_list[0] = spl_boot_device();
}

#ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
__weak void spl_board_announce_boot_device(void) { }
#endif

#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
struct boot_device_name {
	u32 boot_dev;
	const char *name;
};

struct boot_device_name boot_name_table[] = {
#ifdef CONFIG_SPL_RAM_DEVICE
	{ BOOT_DEVICE_RAM, "RAM" },
#endif
#ifdef CONFIG_SPL_MMC_SUPPORT
	{ BOOT_DEVICE_MMC1, "MMC1" },
	{ BOOT_DEVICE_MMC2, "MMC2" },
	{ BOOT_DEVICE_MMC2_2, "MMC2_2" },
#endif
#ifdef CONFIG_SPL_NAND_SUPPORT
	{ BOOT_DEVICE_NAND, "NAND" },
#endif
#ifdef CONFIG_SPL_ONENAND_SUPPORT
	{ BOOT_DEVICE_ONENAND, "OneNAND" },
#endif
#ifdef CONFIG_SPL_NOR_SUPPORT
	{ BOOT_DEVICE_NOR, "NOR" },
#endif
#ifdef CONFIG_SPL_YMODEM_SUPPORT
	{ BOOT_DEVICE_UART, "UART" },
#endif
#ifdef CONFIG_SPL_SPI_SUPPORT
	{ BOOT_DEVICE_SPI, "SPI" },
#endif
#ifdef CONFIG_SPL_ETH_SUPPORT
#ifdef CONFIG_SPL_ETH_DEVICE
	{ BOOT_DEVICE_CPGMAC, "eth device" },
#else
	{ BOOT_DEVICE_CPGMAC, "net" },
#endif
#endif
#ifdef CONFIG_SPL_USBETH_SUPPORT
	{ BOOT_DEVICE_USBETH, "USB eth" },
#endif
#ifdef CONFIG_SPL_USB_SUPPORT
	{ BOOT_DEVICE_USB, "USB" },
#endif
#ifdef CONFIG_SPL_SATA_SUPPORT
	{ BOOT_DEVICE_SATA, "SATA" },
#endif
	/* Keep this entry last */
	{ BOOT_DEVICE_NONE, "unknown boot device" },
};

static void announce_boot_device(u32 boot_device)
{
	int i;

	puts("Trying to boot from ");

#ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
	if (boot_device == BOOT_DEVICE_BOARD) {
		spl_board_announce_boot_device();
		puts("\n");
		return;
	}
#endif
	for (i = 0; i < ARRAY_SIZE(boot_name_table) - 1; i++) {
		if (boot_name_table[i].boot_dev == boot_device)
			break;
	}

	printf("%s\n", boot_name_table[i].name);
}
#else
static inline void announce_boot_device(u32 boot_device) { }
#endif

static int spl_load_image(u32 boot_device)
{
	switch (boot_device) {
#ifdef CONFIG_SPL_RAM_DEVICE
	case BOOT_DEVICE_RAM:
		return spl_ram_load_image();
#endif
#ifdef CONFIG_SPL_MMC_SUPPORT
	case BOOT_DEVICE_MMC1:
	case BOOT_DEVICE_MMC2:
	case BOOT_DEVICE_MMC2_2:
		return spl_mmc_load_image(boot_device);
#endif
#ifdef CONFIG_SPL_NAND_SUPPORT
	case BOOT_DEVICE_NAND:
		return spl_nand_load_image();
#endif
#ifdef CONFIG_SPL_ONENAND_SUPPORT
	case BOOT_DEVICE_ONENAND:
		return spl_onenand_load_image();
#endif
#ifdef CONFIG_SPL_NOR_SUPPORT
	case BOOT_DEVICE_NOR:
		return spl_nor_load_image();
#endif
#ifdef CONFIG_SPL_YMODEM_SUPPORT
	case BOOT_DEVICE_UART:
		return spl_ymodem_load_image();
#endif
#ifdef CONFIG_SPL_SPI_SUPPORT
	case BOOT_DEVICE_SPI:
		return spl_spi_load_image();
#endif
#ifdef CONFIG_SPL_ETH_SUPPORT
	case BOOT_DEVICE_CPGMAC:
#ifdef CONFIG_SPL_ETH_DEVICE
		return spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
#else
		return spl_net_load_image(NULL);
#endif
#endif
#ifdef CONFIG_SPL_USBETH_SUPPORT
	case BOOT_DEVICE_USBETH:
		return spl_net_load_image("usb_ether");
#endif
#ifdef CONFIG_SPL_USB_SUPPORT
	case BOOT_DEVICE_USB:
		return spl_usb_load_image();
#endif
#ifdef CONFIG_SPL_SATA_SUPPORT
	case BOOT_DEVICE_SATA:
		return spl_sata_load_image();
#endif
#ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
	case BOOT_DEVICE_BOARD:
		return spl_board_load_image();
#endif
	default:
#if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
		puts("SPL: Unsupported Boot Device!\n");
#endif
		return -ENODEV;
	}

	return -EINVAL;
}

void board_init_r(gd_t *dummy1, ulong dummy2)
{
	int i;

	debug(">>spl:board_init_r()\n");

#if defined(CONFIG_SYS_SPL_MALLOC_START)
	mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
			CONFIG_SYS_SPL_MALLOC_SIZE);
	gd->flags |= GD_FLG_FULL_MALLOC_INIT;
#endif
	if (!(gd->flags & GD_FLG_SPL_INIT)) {
		if (spl_init())
			hang();
	}
#ifndef CONFIG_PPC
	/*
	 * timer_init() does not exist on PPC systems. The timer is initialized
	 * and enabled (decrementer) in interrupt_init() here.
	 */
	timer_init();
#endif

#ifdef CONFIG_SPL_BOARD_INIT
	spl_board_init();
#endif

	board_boot_order(spl_boot_list);
	for (i = 0; i < ARRAY_SIZE(spl_boot_list) &&
			spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
		announce_boot_device(spl_boot_list[i]);
		if (!spl_load_image(spl_boot_list[i]))
			break;
	}

	if (i == ARRAY_SIZE(spl_boot_list) ||
	    spl_boot_list[i] == BOOT_DEVICE_NONE) {
		puts("SPL: failed to boot from all boot devices\n");
		hang();
	}

	switch (spl_image.os) {
	case IH_OS_U_BOOT:
		debug("Jumping to U-Boot\n");
		break;
#ifdef CONFIG_SPL_OS_BOOT
	case IH_OS_LINUX:
		debug("Jumping to Linux\n");
		spl_board_prepare_for_linux();
		jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
#endif
	default:
		debug("Unsupported OS image.. Jumping nevertheless..\n");
	}
#if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
	debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
	      gd->malloc_ptr / 1024);
#endif

	debug("loaded - jumping to U-Boot...");
	jump_to_image_no_args(&spl_image);
}

/*
 * This requires UART clocks to be enabled.  In order for this to work the
 * caller must ensure that the gd pointer is valid.
 */
void preloader_console_init(void)
{
	gd->bd = &bdata;
	gd->baudrate = CONFIG_BAUDRATE;

	serial_init();		/* serial communications setup */

	gd->have_console = 1;

	puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
			U_BOOT_TIME ")\n");
#ifdef CONFIG_SPL_DISPLAY_PRINT
	spl_display_print();
#endif
}

/**
 * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
 *
 * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
 * for the main board_init_r() execution. This is typically because we need
 * more stack space for things like the MMC sub-system.
 *
 * This function calculates the stack position, copies the global_data into
 * place, sets the new gd (except for ARM, for which setting GD within a C
 * function may not always work) and returns the new stack position. The
 * caller is responsible for setting up the sp register and, in the case
 * of ARM, setting up gd.
 *
 * All of this is done using the same layout and alignments as done in
 * board_init_f_init_reserve() / board_init_f_alloc_reserve().
 *
 * @return new stack location, or 0 to use the same stack
 */
ulong spl_relocate_stack_gd(void)
{
#ifdef CONFIG_SPL_STACK_R
	gd_t *new_gd;
	ulong ptr = CONFIG_SPL_STACK_R_ADDR;

#ifdef CONFIG_SPL_SYS_MALLOC_SIMPLE
	if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
		if (!(gd->flags & GD_FLG_SPL_INIT))
			panic_str("spl_init must be called before heap reloc");

		ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
		gd->malloc_base = ptr;
		gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
		gd->malloc_ptr = 0;
	}
#endif
	/* Get stack position: use 8-byte alignment for ABI compliance */
	ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
	new_gd = (gd_t *)ptr;
	memcpy(new_gd, (void *)gd, sizeof(gd_t));
#if !defined(CONFIG_ARM)
	gd = new_gd;
#endif
	return ptr;
#else
	return 0;
#endif
}