xref: /rk3399_rockchip-uboot/arch/arm/lib/bootm.c (revision 7e044b9aeceaa3c07ba4dd8939761bd87f4c8300) 
1 /* Copyright (C) 2011
2  * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
3  *  - Added prep subcommand support
4  *  - Reorganized source - modeled after powerpc version
5  *
6  * (C) Copyright 2002
7  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8  * Marius Groeger <mgroeger@sysgo.de>
9  *
10  * Copyright (C) 2001  Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
11  *
12  * SPDX-License-Identifier:	GPL-2.0+
13  */
14 
15 #include <common.h>
16 #include <command.h>
17 #include <amp.h>
18 #include <dm.h>
19 #include <dm/root.h>
20 #include <image.h>
21 #include <u-boot/zlib.h>
22 #include <asm/byteorder.h>
23 #include <linux/libfdt.h>
24 #include <mapmem.h>
25 #include <fdt_support.h>
26 #include <asm/bootm.h>
27 #include <asm/secure.h>
28 #include <linux/compiler.h>
29 #include <bootm.h>
30 #include <vxworks.h>
31 
32 #ifdef CONFIG_ARMV7_NONSEC
33 #include <asm/armv7.h>
34 #endif
35 #include <asm/setup.h>
36 #include <asm/arch/rockchip_smccc.h>
37 
38 DECLARE_GLOBAL_DATA_PTR;
39 
40 static struct tag *params;
41 
42 static ulong get_sp(void)
43 {
44 	ulong ret;
45 
46 	asm("mov %0, sp" : "=r"(ret) : );
47 	return ret;
48 }
49 
50 void arch_lmb_reserve(struct lmb *lmb)
51 {
52 	ulong sp;
53 
54 	/*
55 	 * Booting a (Linux) kernel image
56 	 *
57 	 * Allocate space for command line and board info - the
58 	 * address should be as high as possible within the reach of
59 	 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
60 	 * memory, which means far enough below the current stack
61 	 * pointer.
62 	 */
63 	sp = get_sp();
64 	debug("## Current stack ends at 0x%08lx ", sp);
65 
66 	/* adjust sp by 4K to be safe */
67 	sp -= 4096;
68 	lmb_reserve(lmb, sp,
69 		    gd->ram_top - sp);
70 }
71 
72 __weak void board_quiesce_devices(void *images)
73 {
74 }
75 
76 /**
77  * announce_and_cleanup() - Print message and prepare for kernel boot
78  *
79  * @fake: non-zero to do everything except actually boot
80  */
81 static void announce_and_cleanup(bootm_headers_t *images, int fake)
82 {
83 	ulong us;
84 
85 	bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
86 #ifdef CONFIG_BOOTSTAGE_FDT
87 	bootstage_fdt_add_report();
88 #endif
89 #ifdef CONFIG_BOOTSTAGE_REPORT
90 	bootstage_report();
91 #endif
92 
93 #ifdef CONFIG_USB_DEVICE
94 	udc_disconnect();
95 #endif
96 
97 	board_quiesce_devices(images);
98 
99 	/* Flush all console data */
100 	flushc();
101 
102 	/*
103 	 * Call remove function of all devices with a removal flag set.
104 	 * This may be useful for last-stage operations, like cancelling
105 	 * of DMA operation or releasing device internal buffers.
106 	 */
107 	dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
108 
109 	cleanup_before_linux();
110 
111 	us = (get_ticks() - gd->sys_start_tick) / (COUNTER_FREQUENCY / 1000000);
112 	printf("Total: %ld.%ld ms\n", us / 1000, us % 1000);
113 
114 	printf("\nStarting kernel ...%s\n\n", fake ?
115 		"(fake run for tracing)" : "");
116 }
117 
118 static void setup_start_tag (bd_t *bd)
119 {
120 	params = (struct tag *)bd->bi_boot_params;
121 
122 	params->hdr.tag = ATAG_CORE;
123 	params->hdr.size = tag_size (tag_core);
124 
125 	params->u.core.flags = 0;
126 	params->u.core.pagesize = 0;
127 	params->u.core.rootdev = 0;
128 
129 	params = tag_next (params);
130 }
131 
132 static void setup_memory_tags(bd_t *bd)
133 {
134 	int i;
135 
136 	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
137 		params->hdr.tag = ATAG_MEM;
138 		params->hdr.size = tag_size (tag_mem32);
139 
140 		params->u.mem.start = bd->bi_dram[i].start;
141 		params->u.mem.size = bd->bi_dram[i].size;
142 
143 		params = tag_next (params);
144 	}
145 }
146 
147 static void setup_commandline_tag(bd_t *bd, char *commandline)
148 {
149 	char *p;
150 
151 	if (!commandline)
152 		return;
153 
154 	/* eat leading white space */
155 	for (p = commandline; *p == ' '; p++);
156 
157 	/* skip non-existent command lines so the kernel will still
158 	 * use its default command line.
159 	 */
160 	if (*p == '\0')
161 		return;
162 
163 	params->hdr.tag = ATAG_CMDLINE;
164 	params->hdr.size =
165 		(sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
166 
167 	strcpy (params->u.cmdline.cmdline, p);
168 
169 	params = tag_next (params);
170 }
171 
172 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
173 {
174 	/* an ATAG_INITRD node tells the kernel where the compressed
175 	 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
176 	 */
177 	params->hdr.tag = ATAG_INITRD2;
178 	params->hdr.size = tag_size (tag_initrd);
179 
180 	params->u.initrd.start = initrd_start;
181 	params->u.initrd.size = initrd_end - initrd_start;
182 
183 	params = tag_next (params);
184 }
185 
186 static void setup_serial_tag(struct tag **tmp)
187 {
188 	struct tag *params = *tmp;
189 	struct tag_serialnr serialnr;
190 
191 	get_board_serial(&serialnr);
192 	params->hdr.tag = ATAG_SERIAL;
193 	params->hdr.size = tag_size (tag_serialnr);
194 	params->u.serialnr.low = serialnr.low;
195 	params->u.serialnr.high= serialnr.high;
196 	params = tag_next (params);
197 	*tmp = params;
198 }
199 
200 static void setup_revision_tag(struct tag **in_params)
201 {
202 	u32 rev = 0;
203 
204 	rev = get_board_rev();
205 	params->hdr.tag = ATAG_REVISION;
206 	params->hdr.size = tag_size (tag_revision);
207 	params->u.revision.rev = rev;
208 	params = tag_next (params);
209 }
210 
211 static void setup_end_tag(bd_t *bd)
212 {
213 	params->hdr.tag = ATAG_NONE;
214 	params->hdr.size = 0;
215 }
216 
217 __weak void setup_board_tags(struct tag **in_params) {}
218 
219 #ifdef CONFIG_ARM64
220 static void do_nonsec_virt_switch(void)
221 {
222 	smp_kick_all_cpus();
223 	dcache_disable();	/* flush cache before swtiching to EL2 */
224 }
225 #endif
226 
227 /* Subcommand: PREP */
228 static void boot_prep_linux(bootm_headers_t *images)
229 {
230 	char *commandline = env_get("bootargs");
231 
232 	if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
233 #ifdef CONFIG_OF_LIBFDT
234 		debug("using: FDT\n");
235 		if (image_setup_linux(images)) {
236 			printf("FDT creation failed! hanging...");
237 			hang();
238 		}
239 #endif
240 	} else if (BOOTM_ENABLE_TAGS) {
241 		debug("using: ATAGS\n");
242 		setup_start_tag(gd->bd);
243 		if (BOOTM_ENABLE_SERIAL_TAG)
244 			setup_serial_tag(&params);
245 		if (BOOTM_ENABLE_CMDLINE_TAG)
246 			setup_commandline_tag(gd->bd, commandline);
247 		if (BOOTM_ENABLE_REVISION_TAG)
248 			setup_revision_tag(&params);
249 		if (BOOTM_ENABLE_MEMORY_TAGS)
250 			setup_memory_tags(gd->bd);
251 		if (BOOTM_ENABLE_INITRD_TAG) {
252 			/*
253 			 * In boot_ramdisk_high(), it may relocate ramdisk to
254 			 * a specified location. And set images->initrd_start &
255 			 * images->initrd_end to relocated ramdisk's start/end
256 			 * addresses. So use them instead of images->rd_start &
257 			 * images->rd_end when possible.
258 			 */
259 			if (images->initrd_start && images->initrd_end) {
260 				setup_initrd_tag(gd->bd, images->initrd_start,
261 						 images->initrd_end);
262 			} else if (images->rd_start && images->rd_end) {
263 				setup_initrd_tag(gd->bd, images->rd_start,
264 						 images->rd_end);
265 			}
266 		}
267 		setup_board_tags(&params);
268 		setup_end_tag(gd->bd);
269 	} else {
270 		printf("FDT and ATAGS support not compiled in - hanging\n");
271 		hang();
272 	}
273 }
274 
275 __weak bool armv7_boot_nonsec_default(void)
276 {
277 #ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT
278 	return false;
279 #else
280 	return true;
281 #endif
282 }
283 
284 #ifdef CONFIG_ARMV7_NONSEC
285 bool armv7_boot_nonsec(void)
286 {
287 	char *s = env_get("bootm_boot_mode");
288 	bool nonsec = armv7_boot_nonsec_default();
289 
290 	if (s && !strcmp(s, "sec"))
291 		nonsec = false;
292 
293 	if (s && !strcmp(s, "nonsec"))
294 		nonsec = true;
295 
296 	return nonsec;
297 }
298 #endif
299 
300 #ifdef CONFIG_ARM64
301 __weak void update_os_arch_secondary_cores(uint8_t os_arch)
302 {
303 }
304 
305 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1
306 static void switch_to_el1(void)
307 {
308 	if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
309 	    (images.os.arch == IH_ARCH_ARM))
310 		armv8_switch_to_el1(0, (u64)gd->bd->bi_arch_number,
311 				    (u64)images.ft_addr, 0,
312 				    (u64)images.ep,
313 				    ES_TO_AARCH32);
314 	else
315 		armv8_switch_to_el1((u64)images.ft_addr, 0, 0, 0,
316 				    images.ep,
317 				    ES_TO_AARCH64);
318 }
319 #endif
320 #endif
321 
322 #ifdef CONFIG_ARM64_SWITCH_TO_AARCH32
323 static int arm64_switch_aarch32(bootm_headers_t *images)
324 {
325 	void *fdt = images->ft_addr;
326 	ulong mpidr;
327 	int ret, es_flag;
328 	int nodeoff, tmp;
329 	int num = -1;
330 
331 	/* arm aarch32 SVC */
332 	images->os.arch = IH_ARCH_ARM;
333 	es_flag = PE_STATE(0, 0, 0, 0);
334 
335 	nodeoff = fdt_path_offset(fdt, "/cpus");
336 	if (nodeoff < 0) {
337 		printf("couldn't find /cpus\n");
338 		return nodeoff;
339 	}
340 
341 	/* config all nonboot cpu state */
342 	for (tmp = fdt_first_subnode(fdt, nodeoff);
343 	     tmp >= 0;
344 	     tmp = fdt_next_subnode(fdt, tmp)) {
345 		const struct fdt_property *prop;
346 		int len;
347 
348 		prop = fdt_get_property(fdt, tmp, "device_type", &len);
349 		if (!prop)
350 			continue;
351 		if (len < 4)
352 			continue;
353 		if (strcmp(prop->data, "cpu"))
354 			continue;
355 		/* skip boot(first) cpu */
356 		num++;
357 		if (num == 0)
358 			continue;
359 
360 		mpidr = (ulong)fdtdec_get_addr_size_auto_parent(fdt,
361 					nodeoff, tmp, "reg", 0, NULL, false);
362 		ret = sip_smc_amp_cfg(AMP_PE_STATE, mpidr, es_flag, 0);
363 		if (ret) {
364 			printf("CPU@%lx init AArch32 failed: %d\n", mpidr, ret);
365 			continue;
366 		}
367 	}
368 
369 	return es_flag;
370 }
371 #endif
372 
373 /* Subcommand: GO */
374 static void boot_jump_linux(bootm_headers_t *images, int flag)
375 {
376 #ifdef CONFIG_ARM64
377 	void (*kernel_entry)(void *fdt_addr, void *res0, void *res1,
378 			void *res2);
379 	int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
380 	int es_flag = 0;
381 
382 #if defined(CONFIG_AMP)
383 	es_flag = arm64_switch_amp_pe(images);
384 #elif defined(CONFIG_ARM64_SWITCH_TO_AARCH32)
385 	es_flag = arm64_switch_aarch32(images);
386 #endif
387 	kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1,
388 				void *res2))images->ep;
389 
390 	debug("## Transferring control to Linux (at address %lx)...\n",
391 		(ulong) kernel_entry);
392 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
393 
394 	announce_and_cleanup(images, fake);
395 
396 	if (!fake) {
397 #ifdef CONFIG_ARMV8_PSCI
398 		armv8_setup_psci();
399 #endif
400 		do_nonsec_virt_switch();
401 
402 		update_os_arch_secondary_cores(images->os.arch);
403 
404 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1
405 		armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
406 				    (u64)switch_to_el1, ES_TO_AARCH64);
407 #else
408 		if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
409 		    (images->os.arch == IH_ARCH_ARM))
410 			armv8_switch_to_el2(0, (u64)gd->bd->bi_arch_number,
411 					    (u64)images->ft_addr, es_flag,
412 					    (u64)images->ep,
413 					    ES_TO_AARCH32);
414 		else
415 			armv8_switch_to_el2((u64)images->ft_addr, 0, 0, es_flag,
416 					    images->ep,
417 					    ES_TO_AARCH64);
418 #endif
419 	}
420 #else
421 	unsigned long machid = gd->bd->bi_arch_number;
422 	char *s;
423 	void (*kernel_entry)(int zero, int arch, uint params);
424 	unsigned long r2;
425 	int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
426 
427 	kernel_entry = (void (*)(int, int, uint))images->ep;
428 #ifdef CONFIG_CPU_V7M
429 	ulong addr = (ulong)kernel_entry | 1;
430 	kernel_entry = (void *)addr;
431 #endif
432 	s = env_get("machid");
433 	if (s) {
434 		if (strict_strtoul(s, 16, &machid) < 0) {
435 			debug("strict_strtoul failed!\n");
436 			return;
437 		}
438 		printf("Using machid 0x%lx from environment\n", machid);
439 	}
440 
441 	debug("## Transferring control to Linux (at address %08lx)" \
442 		"...\n", (ulong) kernel_entry);
443 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
444 	announce_and_cleanup(images, fake);
445 
446 	if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
447 		r2 = (unsigned long)images->ft_addr;
448 	else
449 		r2 = gd->bd->bi_boot_params;
450 
451 	if (!fake) {
452 #ifdef CONFIG_ARMV7_NONSEC
453 		if (armv7_boot_nonsec()) {
454 			armv7_init_nonsec();
455 			secure_ram_addr(_do_nonsec_entry)(kernel_entry,
456 							  0, machid, r2);
457 		} else
458 #endif
459 			kernel_entry(0, machid, r2);
460 	}
461 #endif
462 }
463 
464 /* Main Entry point for arm bootm implementation
465  *
466  * Modeled after the powerpc implementation
467  * DIFFERENCE: Instead of calling prep and go at the end
468  * they are called if subcommand is equal 0.
469  */
470 int do_bootm_linux(int flag, int argc, char * const argv[],
471 		   bootm_headers_t *images)
472 {
473 	/* No need for those on ARM */
474 	if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
475 		return -1;
476 
477 	if (flag & BOOTM_STATE_OS_PREP) {
478 		boot_prep_linux(images);
479 		return 0;
480 	}
481 
482 	if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
483 		boot_jump_linux(images, flag);
484 		return 0;
485 	}
486 
487 	boot_prep_linux(images);
488 	boot_jump_linux(images, flag);
489 	return 0;
490 }
491 
492 #if defined(CONFIG_BOOTM_VXWORKS)
493 void boot_prep_vxworks(bootm_headers_t *images)
494 {
495 #if defined(CONFIG_OF_LIBFDT)
496 	int off;
497 
498 	if (images->ft_addr) {
499 		off = fdt_path_offset(images->ft_addr, "/memory");
500 		if (off < 0) {
501 			if (arch_fixup_fdt(images->ft_addr))
502 				puts("## WARNING: fixup memory failed!\n");
503 		}
504 	}
505 #endif
506 	cleanup_before_linux();
507 }
508 void boot_jump_vxworks(bootm_headers_t *images)
509 {
510 	/* ARM VxWorks requires device tree physical address to be passed */
511 	((void (*)(void *))images->ep)(images->ft_addr);
512 }
513 #endif
514