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15#include <common.h>
16#include <command.h>
17#include <dm/device.h>
18#include <dm/root.h>
19#include <image.h>
20#include <u-boot/zlib.h>
21#include <asm/byteorder.h>
22#include <libfdt.h>
23#include <mapmem.h>
24#include <fdt_support.h>
25#include <asm/bootm.h>
26#include <asm/secure.h>
27#include <linux/compiler.h>
28#include <bootm.h>
29#include <vxworks.h>
30
31#ifdef CONFIG_ARMV7_NONSEC
32#include <asm/armv7.h>
33#endif
34
35DECLARE_GLOBAL_DATA_PTR;
36
37static struct tag *params;
38
39static ulong get_sp(void)
40{
41 ulong ret;
42
43 asm("mov %0, sp" : "=r"(ret) : );
44 return ret;
45}
46
47void arch_lmb_reserve(struct lmb *lmb)
48{
49 ulong sp;
50
51
52
53
54
55
56
57
58
59
60 sp = get_sp();
61 debug("## Current stack ends at 0x%08lx ", sp);
62
63
64 sp -= 4096;
65 lmb_reserve(lmb, sp,
66 gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
67}
68
69__weak void board_quiesce_devices(void)
70{
71}
72
73
74
75
76
77
78static void announce_and_cleanup(int fake)
79{
80 printf("\nStarting kernel ...%s\n\n", fake ?
81 "(fake run for tracing)" : "");
82 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
83#ifdef CONFIG_BOOTSTAGE_FDT
84 bootstage_fdt_add_report();
85#endif
86#ifdef CONFIG_BOOTSTAGE_REPORT
87 bootstage_report();
88#endif
89
90#ifdef CONFIG_USB_DEVICE
91 udc_disconnect();
92#endif
93
94 board_quiesce_devices();
95
96
97
98
99
100
101 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
102
103 cleanup_before_linux();
104}
105
106static void setup_start_tag (bd_t *bd)
107{
108 params = (struct tag *)bd->bi_boot_params;
109
110 params->hdr.tag = ATAG_CORE;
111 params->hdr.size = tag_size (tag_core);
112
113 params->u.core.flags = 0;
114 params->u.core.pagesize = 0;
115 params->u.core.rootdev = 0;
116
117 params = tag_next (params);
118}
119
120static void setup_memory_tags(bd_t *bd)
121{
122 int i;
123
124 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
125 params->hdr.tag = ATAG_MEM;
126 params->hdr.size = tag_size (tag_mem32);
127
128 params->u.mem.start = bd->bi_dram[i].start;
129 params->u.mem.size = bd->bi_dram[i].size;
130
131 params = tag_next (params);
132 }
133}
134
135static void setup_commandline_tag(bd_t *bd, char *commandline)
136{
137 char *p;
138
139 if (!commandline)
140 return;
141
142
143 for (p = commandline; *p == ' '; p++);
144
145
146
147
148 if (*p == '\0')
149 return;
150
151 params->hdr.tag = ATAG_CMDLINE;
152 params->hdr.size =
153 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
154
155 strcpy (params->u.cmdline.cmdline, p);
156
157 params = tag_next (params);
158}
159
160static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
161{
162
163
164
165 params->hdr.tag = ATAG_INITRD2;
166 params->hdr.size = tag_size (tag_initrd);
167
168 params->u.initrd.start = initrd_start;
169 params->u.initrd.size = initrd_end - initrd_start;
170
171 params = tag_next (params);
172}
173
174static void setup_serial_tag(struct tag **tmp)
175{
176 struct tag *params = *tmp;
177 struct tag_serialnr serialnr;
178
179 get_board_serial(&serialnr);
180 params->hdr.tag = ATAG_SERIAL;
181 params->hdr.size = tag_size (tag_serialnr);
182 params->u.serialnr.low = serialnr.low;
183 params->u.serialnr.high= serialnr.high;
184 params = tag_next (params);
185 *tmp = params;
186}
187
188static void setup_revision_tag(struct tag **in_params)
189{
190 u32 rev = 0;
191
192 rev = get_board_rev();
193 params->hdr.tag = ATAG_REVISION;
194 params->hdr.size = tag_size (tag_revision);
195 params->u.revision.rev = rev;
196 params = tag_next (params);
197}
198
199static void setup_end_tag(bd_t *bd)
200{
201 params->hdr.tag = ATAG_NONE;
202 params->hdr.size = 0;
203}
204
205__weak void setup_board_tags(struct tag **in_params) {}
206
207#ifdef CONFIG_ARM64
208static void do_nonsec_virt_switch(void)
209{
210 smp_kick_all_cpus();
211 dcache_disable();
212}
213#endif
214
215
216static void boot_prep_linux(bootm_headers_t *images)
217{
218 char *commandline = getenv("bootargs");
219
220 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
221#ifdef CONFIG_OF_LIBFDT
222 debug("using: FDT\n");
223 if (image_setup_linux(images)) {
224 printf("FDT creation failed! hanging...");
225 hang();
226 }
227#endif
228 } else if (BOOTM_ENABLE_TAGS) {
229 debug("using: ATAGS\n");
230 setup_start_tag(gd->bd);
231 if (BOOTM_ENABLE_SERIAL_TAG)
232 setup_serial_tag(¶ms);
233 if (BOOTM_ENABLE_CMDLINE_TAG)
234 setup_commandline_tag(gd->bd, commandline);
235 if (BOOTM_ENABLE_REVISION_TAG)
236 setup_revision_tag(¶ms);
237 if (BOOTM_ENABLE_MEMORY_TAGS)
238 setup_memory_tags(gd->bd);
239 if (BOOTM_ENABLE_INITRD_TAG) {
240
241
242
243
244
245
246
247 if (images->initrd_start && images->initrd_end) {
248 setup_initrd_tag(gd->bd, images->initrd_start,
249 images->initrd_end);
250 } else if (images->rd_start && images->rd_end) {
251 setup_initrd_tag(gd->bd, images->rd_start,
252 images->rd_end);
253 }
254 }
255 setup_board_tags(¶ms);
256 setup_end_tag(gd->bd);
257 } else {
258 printf("FDT and ATAGS support not compiled in - hanging\n");
259 hang();
260 }
261}
262
263__weak bool armv7_boot_nonsec_default(void)
264{
265#ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT
266 return false;
267#else
268 return true;
269#endif
270}
271
272#ifdef CONFIG_ARMV7_NONSEC
273bool armv7_boot_nonsec(void)
274{
275 char *s = getenv("bootm_boot_mode");
276 bool nonsec = armv7_boot_nonsec_default();
277
278 if (s && !strcmp(s, "sec"))
279 nonsec = false;
280
281 if (s && !strcmp(s, "nonsec"))
282 nonsec = true;
283
284 return nonsec;
285}
286#endif
287
288#ifdef CONFIG_ARM64
289__weak void update_os_arch_secondary_cores(uint8_t os_arch)
290{
291}
292
293#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
294static void switch_to_el1(void)
295{
296 if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
297 (images.os.arch == IH_ARCH_ARM))
298 armv8_switch_to_el1(0, (u64)gd->bd->bi_arch_number,
299 (u64)images.ft_addr, 0,
300 (u64)images.ep,
301 ES_TO_AARCH32);
302 else
303 armv8_switch_to_el1((u64)images.ft_addr, 0, 0, 0,
304 images.ep,
305 ES_TO_AARCH64);
306}
307#endif
308#endif
309
310
311static void boot_jump_linux(bootm_headers_t *images, int flag)
312{
313#ifdef CONFIG_ARM64
314 void (*kernel_entry)(void *fdt_addr, void *res0, void *res1,
315 void *res2);
316 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
317
318 kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1,
319 void *res2))images->ep;
320
321 debug("## Transferring control to Linux (at address %lx)...\n",
322 (ulong) kernel_entry);
323 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
324
325 announce_and_cleanup(fake);
326
327 if (!fake) {
328#ifdef CONFIG_ARMV8_PSCI
329 armv8_setup_psci();
330#endif
331 do_nonsec_virt_switch();
332
333 update_os_arch_secondary_cores(images->os.arch);
334
335#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
336 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
337 (u64)switch_to_el1, ES_TO_AARCH64);
338#else
339 if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
340 (images->os.arch == IH_ARCH_ARM))
341 armv8_switch_to_el2(0, (u64)gd->bd->bi_arch_number,
342 (u64)images->ft_addr, 0,
343 (u64)images->ep,
344 ES_TO_AARCH32);
345 else
346 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
347 images->ep,
348 ES_TO_AARCH64);
349#endif
350 }
351#else
352 unsigned long machid = gd->bd->bi_arch_number;
353 char *s;
354 void (*kernel_entry)(int zero, int arch, uint params);
355 unsigned long r2;
356 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
357
358 kernel_entry = (void (*)(int, int, uint))images->ep;
359#ifdef CONFIG_CPU_V7M
360 ulong addr = (ulong)kernel_entry | 1;
361 kernel_entry = (void *)addr;
362#endif
363 s = getenv("machid");
364 if (s) {
365 if (strict_strtoul(s, 16, &machid) < 0) {
366 debug("strict_strtoul failed!\n");
367 return;
368 }
369 printf("Using machid 0x%lx from environment\n", machid);
370 }
371
372 debug("## Transferring control to Linux (at address %08lx)" \
373 "...\n", (ulong) kernel_entry);
374 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
375 announce_and_cleanup(fake);
376
377 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
378 r2 = (unsigned long)images->ft_addr;
379 else
380 r2 = gd->bd->bi_boot_params;
381
382 if (!fake) {
383#ifdef CONFIG_ARMV7_NONSEC
384 if (armv7_boot_nonsec()) {
385 armv7_init_nonsec();
386 secure_ram_addr(_do_nonsec_entry)(kernel_entry,
387 0, machid, r2);
388 } else
389#endif
390 kernel_entry(0, machid, r2);
391 }
392#endif
393}
394
395
396
397
398
399
400
401int do_bootm_linux(int flag, int argc, char * const argv[],
402 bootm_headers_t *images)
403{
404
405 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
406 return -1;
407
408 if (flag & BOOTM_STATE_OS_PREP) {
409 boot_prep_linux(images);
410 return 0;
411 }
412
413 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
414 boot_jump_linux(images, flag);
415 return 0;
416 }
417
418 boot_prep_linux(images);
419 boot_jump_linux(images, flag);
420 return 0;
421}
422
423#if defined(CONFIG_BOOTM_VXWORKS)
424void boot_prep_vxworks(bootm_headers_t *images)
425{
426#if defined(CONFIG_OF_LIBFDT)
427 int off;
428
429 if (images->ft_addr) {
430 off = fdt_path_offset(images->ft_addr, "/memory");
431 if (off < 0) {
432 if (arch_fixup_fdt(images->ft_addr))
433 puts("## WARNING: fixup memory failed!\n");
434 }
435 }
436#endif
437 cleanup_before_linux();
438}
439void boot_jump_vxworks(bootm_headers_t *images)
440{
441
442 ((void (*)(void *))images->ep)(images->ft_addr);
443}
444#endif
445