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1 /*
2  * (C) Copyright 2010
3  * Texas Instruments, <www.ti.com>
4  *
5  * Aneesh V <aneesh@ti.com>
6  *
7  * SPDX-License-Identifier:     GPL-2.0+
8  */
9
10 #include <common.h>
11 #include <dm.h>
12 #include <spl.h>
13 #include <asm/u-boot.h>
14 #include <nand.h>
15 #include <fat.h>
16 #include <version.h>
17 #include <image.h>
18 #include <malloc.h>
19 #include <dm/root.h>
20 #include <linux/compiler.h>
21 #include <fdt_support.h>
22
23 DECLARE_GLOBAL_DATA_PTR;
24
25 #ifndef CONFIG_SYS_UBOOT_START
26 #define CONFIG_SYS_UBOOT_START  CONFIG_SYS_TEXT_BASE
27 #endif
28 #ifndef CONFIG_SYS_MONITOR_LEN
29 /* Unknown U-Boot size, let's assume it will not be more than 200 KB */
30 #define CONFIG_SYS_MONITOR_LEN  (200 * 1024)
31 #endif
32
33 u32 *boot_params_ptr = NULL;
34
35 /* Define board data structure */
36 static bd_t bdata __attribute__ ((section(".data")));
37
38 /*
39  * Board-specific Platform code can reimplement show_boot_progress () if needed
40  */
41 __weak void show_boot_progress(int val) {}
42
43 /*
44  * Default function to determine if u-boot or the OS should
45  * be started. This implementation always returns 1.
46  *
47  * Please implement your own board specific funcion to do this.
48  *
49  * RETURN
50  * 0 to not start u-boot
51  * positive if u-boot should start
52  */
53 #ifdef CONFIG_SPL_OS_BOOT
54 __weak int spl_start_uboot(void)
55 {
56         puts("SPL: Please implement spl_start_uboot() for your board\n");
57         puts("SPL: Direct Linux boot not active!\n");
58         return 1;
59 }
60
61 /* weak default platform specific function to initialize
62  * dram banks
63  */
64 __weak int dram_init_banksize(void)
65 {
66         return 0;
67 }
68
69 /*
70  * Weak default function for arch specific zImage check. Return zero
71  * and fill start and end address if image is recognized.
72  */
73 int __weak bootz_setup(ulong image, ulong *start, ulong *end)
74 {
75          return 1;
76 }
77 #endif
78
79 void spl_fixup_fdt(void)
80 {
81 #if defined(CONFIG_SPL_OF_LIBFDT) && defined(CONFIG_SYS_SPL_ARGS_ADDR)
82         void *fdt_blob = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
83         int err;
84
85         err = fdt_check_header(fdt_blob);
86         if (err < 0) {
87                 printf("fdt_root: %s\n", fdt_strerror(err));
88                 return;
89         }
90
91         /* fixup the memory dt node */
92         err = fdt_shrink_to_minimum(fdt_blob, 0);
93         if (err == 0) {
94                 printf("spl: fdt_shrink_to_minimum err - %d\n", err);
95                 return;
96         }
97
98         err = arch_fixup_fdt(fdt_blob);
99         if (err) {
100                 printf("spl: arch_fixup_fdt err - %d\n", err);
101                 return;
102         }
103 #endif
104 }
105
106 /*
107  * Weak default function for board specific cleanup/preparation before
108  * Linux boot. Some boards/platforms might not need it, so just provide
109  * an empty stub here.
110  */
111 __weak void spl_board_prepare_for_linux(void)
112 {
113         /* Nothing to do! */
114 }
115
116 __weak void spl_board_prepare_for_boot(void)
117 {
118         /* Nothing to do! */
119 }
120
121 void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
122 {
123         spl_image->size = CONFIG_SYS_MONITOR_LEN;
124         spl_image->entry_point = CONFIG_SYS_UBOOT_START;
125         spl_image->load_addr = CONFIG_SYS_TEXT_BASE;
126         spl_image->os = IH_OS_U_BOOT;
127         spl_image->name = "U-Boot";
128 }
129
130 int spl_parse_image_header(struct spl_image_info *spl_image,
131                            const struct image_header *header)
132 {
133         if (image_get_magic(header) == IH_MAGIC) {
134 #ifdef CONFIG_SPL_LEGACY_IMAGE_SUPPORT
135                 u32 header_size = sizeof(struct image_header);
136
137                 if (spl_image->flags & SPL_COPY_PAYLOAD_ONLY) {
138                         /*
139                          * On some system (e.g. powerpc), the load-address and
140                          * entry-point is located at address 0. We can't load
141                          * to 0-0x40. So skip header in this case.
142                          */
143                         spl_image->load_addr = image_get_load(header);
144                         spl_image->entry_point = image_get_ep(header);
145                         spl_image->size = image_get_data_size(header);
146                 } else {
147                         spl_image->entry_point = image_get_load(header);
148                         /* Load including the header */
149                         spl_image->load_addr = spl_image->entry_point -
150                                 header_size;
151                         spl_image->size = image_get_data_size(header) +
152                                 header_size;
153                 }
154                 spl_image->os = image_get_os(header);
155                 spl_image->name = image_get_name(header);
156                 debug("spl: payload image: %.*s load addr: 0x%lx size: %d\n",
157                         IH_NMLEN, spl_image->name,
158                         spl_image->load_addr, spl_image->size);
159 #else
160                 /* LEGACY image not supported */
161                 debug("Legacy boot image support not enabled, proceeding to other boot methods\n");
162                 return -EINVAL;
163 #endif
164         } else {
165 #ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE
166                 /*
167                  * CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the
168                  * code which loads images in SPL cannot guarantee that
169                  * absolutely all read errors will be reported.
170                  * An example is the LPC32XX MLC NAND driver, which
171                  * will consider that a completely unreadable NAND block
172                  * is bad, and thus should be skipped silently.
173                  */
174                 panic("** no mkimage signature but raw image not supported");
175 #endif
176
177 #ifdef CONFIG_SPL_OS_BOOT
178                 ulong start, end;
179
180                 if (!bootz_setup((ulong)header, &start, &end)) {
181                         spl_image->name = "Linux";
182                         spl_image->os = IH_OS_LINUX;
183                         spl_image->load_addr = CONFIG_SYS_LOAD_ADDR;
184                         spl_image->entry_point = CONFIG_SYS_LOAD_ADDR;
185                         spl_image->size = end - start;
186                         debug("spl: payload zImage, load addr: 0x%lx size: %d\n",
187                               spl_image->load_addr, spl_image->size);
188                         return 0;
189                 }
190 #endif
191
192 #ifdef CONFIG_SPL_RAW_IMAGE_SUPPORT
193                 /* Signature not found - assume u-boot.bin */
194                 debug("mkimage signature not found - ih_magic = %x\n",
195                         header->ih_magic);
196                 spl_set_header_raw_uboot(spl_image);
197 #else
198                 /* RAW image not supported, proceed to other boot methods. */
199                 debug("Raw boot image support not enabled, proceeding to other boot methods\n");
200                 return -EINVAL;
201 #endif
202         }
203
204         return 0;
205 }
206
207 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
208 {
209         typedef void __noreturn (*image_entry_noargs_t)(void);
210
211         image_entry_noargs_t image_entry =
212                 (image_entry_noargs_t)spl_image->entry_point;
213
214         debug("image entry point: 0x%lX\n", spl_image->entry_point);
215         image_entry();
216 }
217
218 static int spl_common_init(bool setup_malloc)
219 {
220         int ret;
221
222         debug("spl_early_init()\n");
223
224 #if CONFIG_VAL(SYS_MALLOC_F_LEN)
225         if (setup_malloc) {
226 #ifdef CONFIG_MALLOC_F_ADDR
227                 gd->malloc_base = CONFIG_MALLOC_F_ADDR;
228 #endif
229                 gd->malloc_limit = CONFIG_VAL(SYS_MALLOC_F_LEN);
230                 gd->malloc_ptr = 0;
231         }
232 #endif
233         ret = bootstage_init(true);
234         if (ret) {
235                 debug("%s: Failed to set up bootstage: ret=%d\n", __func__,
236                       ret);
237                 return ret;
238         }
239         bootstage_mark_name(BOOTSTAGE_ID_START_SPL, "spl");
240         if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
241                 ret = fdtdec_setup();
242                 if (ret) {
243                         debug("fdtdec_setup() returned error %d\n", ret);
244                         return ret;
245                 }
246         }
247         if (CONFIG_IS_ENABLED(DM)) {
248                 bootstage_start(BOOTSTATE_ID_ACCUM_DM_SPL, "dm_spl");
249                 /* With CONFIG_SPL_OF_PLATDATA, bring in all devices */
250                 ret = dm_init_and_scan(!CONFIG_IS_ENABLED(OF_PLATDATA));
251                 bootstage_accum(BOOTSTATE_ID_ACCUM_DM_SPL);
252                 if (ret) {
253                         debug("dm_init_and_scan() returned error %d\n", ret);
254                         return ret;
255                 }
256         }
257
258         return 0;
259 }
260
261 void spl_set_bd(void)
262 {
263         if (!gd->bd)
264                 gd->bd = &bdata;
265 }
266
267 int spl_early_init(void)
268 {
269         int ret;
270
271         ret = spl_common_init(true);
272         if (ret)
273                 return ret;
274         gd->flags |= GD_FLG_SPL_EARLY_INIT;
275
276         return 0;
277 }
278
279 int spl_init(void)
280 {
281         int ret;
282         bool setup_malloc = !(IS_ENABLED(CONFIG_SPL_STACK_R) &&
283                         IS_ENABLED(CONFIG_SPL_SYS_MALLOC_SIMPLE));
284
285         if (!(gd->flags & GD_FLG_SPL_EARLY_INIT)) {
286                 ret = spl_common_init(setup_malloc);
287                 if (ret)
288                         return ret;
289         }
290         gd->flags |= GD_FLG_SPL_INIT;
291
292         return 0;
293 }
294
295 #ifndef BOOT_DEVICE_NONE
296 #define BOOT_DEVICE_NONE 0xdeadbeef
297 #endif
298
299 __weak void board_boot_order(u32 *spl_boot_list)
300 {
301         spl_boot_list[0] = spl_boot_device();
302 }
303
304 static struct spl_image_loader *spl_ll_find_loader(uint boot_device)
305 {
306         struct spl_image_loader *drv =
307                 ll_entry_start(struct spl_image_loader, spl_image_loader);
308         const int n_ents =
309                 ll_entry_count(struct spl_image_loader, spl_image_loader);
310         struct spl_image_loader *entry;
311
312         for (entry = drv; entry != drv + n_ents; entry++) {
313                 if (boot_device == entry->boot_device)
314                         return entry;
315         }
316
317         /* Not found */
318         return NULL;
319 }
320
321 static int spl_load_image(struct spl_image_info *spl_image,
322                           struct spl_image_loader *loader)
323 {
324         struct spl_boot_device bootdev;
325
326         bootdev.boot_device = loader->boot_device;
327         bootdev.boot_device_name = NULL;
328
329         return loader->load_image(spl_image, &bootdev);
330 }
331
332 /**
333  * boot_from_devices() - Try loading an booting U-Boot from a list of devices
334  *
335  * @spl_image: Place to put the image details if successful
336  * @spl_boot_list: List of boot devices to try
337  * @count: Number of elements in spl_boot_list
338  * @return 0 if OK, -ve on error
339  */
340 static int boot_from_devices(struct spl_image_info *spl_image,
341                              u32 spl_boot_list[], int count)
342 {
343         int i;
344
345         for (i = 0; i < count && spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
346                 struct spl_image_loader *loader;
347
348                 loader = spl_ll_find_loader(spl_boot_list[i]);
349 #if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
350                 if (loader)
351                         printf("Trying to boot from %s\n", loader->name);
352                 else
353                         puts("SPL: Unsupported Boot Device!\n");
354 #endif
355                 if (loader && !spl_load_image(spl_image, loader))
356                         return 0;
357         }
358
359         return -ENODEV;
360 }
361
362 void board_init_r(gd_t *dummy1, ulong dummy2)
363 {
364         u32 spl_boot_list[] = {
365                 BOOT_DEVICE_NONE,
366                 BOOT_DEVICE_NONE,
367                 BOOT_DEVICE_NONE,
368                 BOOT_DEVICE_NONE,
369                 BOOT_DEVICE_NONE,
370         };
371         struct spl_image_info spl_image;
372
373         debug(">>spl:board_init_r()\n");
374
375         spl_set_bd();
376
377 #ifdef CONFIG_SPL_OS_BOOT
378         dram_init_banksize();
379 #endif
380
381 #if defined(CONFIG_SYS_SPL_MALLOC_START)
382         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
383                         CONFIG_SYS_SPL_MALLOC_SIZE);
384         gd->flags |= GD_FLG_FULL_MALLOC_INIT;
385 #endif
386         if (!(gd->flags & GD_FLG_SPL_INIT)) {
387                 if (spl_init())
388                         hang();
389         }
390 #if !defined(CONFIG_PPC) && !defined(CONFIG_ARCH_MX6)
391         /*
392          * timer_init() does not exist on PPC systems. The timer is initialized
393          * and enabled (decrementer) in interrupt_init() here.
394          */
395         timer_init();
396 #endif
397
398 #ifdef CONFIG_SPL_BOARD_INIT
399         spl_board_init();
400 #endif
401
402         memset(&spl_image, '\0', sizeof(spl_image));
403 #ifdef CONFIG_SYS_SPL_ARGS_ADDR
404         spl_image.arg = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
405 #endif
406         board_boot_order(spl_boot_list);
407
408         if (boot_from_devices(&spl_image, spl_boot_list,
409                               ARRAY_SIZE(spl_boot_list))) {
410                 puts("SPL: failed to boot from all boot devices\n");
411                 hang();
412         }
413
414 #ifdef CONFIG_CPU_V7M
415         spl_image.entry_point |= 0x1;
416 #endif
417         switch (spl_image.os) {
418         case IH_OS_U_BOOT:
419                 debug("Jumping to U-Boot\n");
420                 break;
421 #ifdef CONFIG_SPL_OS_BOOT
422         case IH_OS_LINUX:
423                 debug("Jumping to Linux\n");
424                 spl_fixup_fdt();
425                 spl_board_prepare_for_linux();
426                 jump_to_image_linux(&spl_image);
427 #endif
428         default:
429                 debug("Unsupported OS image.. Jumping nevertheless..\n");
430         }
431 #if CONFIG_VAL(SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
432         debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
433               gd->malloc_ptr / 1024);
434 #endif
435 #ifdef CONFIG_BOOTSTAGE_STASH
436         int ret;
437
438         bootstage_mark_name(BOOTSTAGE_ID_END_SPL, "end_spl");
439         ret = bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH_ADDR,
440                               CONFIG_BOOTSTAGE_STASH_SIZE);
441         if (ret)
442                 debug("Failed to stash bootstage: err=%d\n", ret);
443 #endif
444
445         if (CONFIG_IS_ENABLED(ATF_SUPPORT)) {
446                 debug("loaded - jumping to U-Boot via ATF BL31.\n");
447                 bl31_entry();
448         }
449
450         debug("loaded - jumping to U-Boot...\n");
451         spl_board_prepare_for_boot();
452         jump_to_image_no_args(&spl_image);
453 }
454
455 /*
456  * This requires UART clocks to be enabled.  In order for this to work the
457  * caller must ensure that the gd pointer is valid.
458  */
459 void preloader_console_init(void)
460 {
461         gd->baudrate = CONFIG_BAUDRATE;
462
463         serial_init();          /* serial communications setup */
464
465         gd->have_console = 1;
466
467         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
468                         U_BOOT_TIME ")\n");
469 #ifdef CONFIG_SPL_DISPLAY_PRINT
470         spl_display_print();
471 #endif
472 }
473
474 /**
475  * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
476  *
477  * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
478  * for the main board_init_r() execution. This is typically because we need
479  * more stack space for things like the MMC sub-system.
480  *
481  * This function calculates the stack position, copies the global_data into
482  * place, sets the new gd (except for ARM, for which setting GD within a C
483  * function may not always work) and returns the new stack position. The
484  * caller is responsible for setting up the sp register and, in the case
485  * of ARM, setting up gd.
486  *
487  * All of this is done using the same layout and alignments as done in
488  * board_init_f_init_reserve() / board_init_f_alloc_reserve().
489  *
490  * @return new stack location, or 0 to use the same stack
491  */
492 ulong spl_relocate_stack_gd(void)
493 {
494 #ifdef CONFIG_SPL_STACK_R
495         gd_t *new_gd;
496         ulong ptr = CONFIG_SPL_STACK_R_ADDR;
497
498 #if defined(CONFIG_SPL_SYS_MALLOC_SIMPLE) && CONFIG_VAL(SYS_MALLOC_F_LEN)
499         if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
500                 ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
501                 gd->malloc_base = ptr;
502                 gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
503                 gd->malloc_ptr = 0;
504         }
505 #endif
506         /* Get stack position: use 8-byte alignment for ABI compliance */
507         ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
508         new_gd = (gd_t *)ptr;
509         memcpy(new_gd, (void *)gd, sizeof(gd_t));
510 #if CONFIG_IS_ENABLED(DM)
511         dm_fixup_for_gd_move(new_gd);
512 #endif
513 #if !defined(CONFIG_ARM)
514         gd = new_gd;
515 #endif
516         return ptr;
517 #else
518         return 0;
519 #endif
520 }