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Simon Schwarz0a672d42012-03-15 04:01:45 +00001/* 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 *
wdenkc6097192002-11-03 00:24:07 +00006 * (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 *
Wolfgang Denk1a459662013-07-08 09:37:19 +020012 * SPDX-License-Identifier: GPL-2.0+
wdenkc6097192002-11-03 00:24:07 +000013 */
14
15#include <common.h>
16#include <command.h>
wdenkc6097192002-11-03 00:24:07 +000017#include <image.h>
Jean-Christophe PLAGNIOL-VILLARDa31e0912009-04-04 12:49:11 +020018#include <u-boot/zlib.h>
wdenkc6097192002-11-03 00:24:07 +000019#include <asm/byteorder.h>
John Rigby2d1916e2010-10-13 13:57:36 -060020#include <libfdt.h>
Joe Hershberger0eb25b62015-03-22 17:08:59 -050021#include <mapmem.h>
John Rigby2d1916e2010-10-13 13:57:36 -060022#include <fdt_support.h>
Simon Schwarz0a672d42012-03-15 04:01:45 +000023#include <asm/bootm.h>
Marc Zyngierf510aea2014-07-12 14:24:03 +010024#include <asm/secure.h>
Pali Rohár89e6f132012-10-19 02:00:04 +000025#include <linux/compiler.h>
Eric Nelson8d196e52014-09-30 15:40:01 -070026#include <bootm.h>
27#include <vxworks.h>
wdenkc6097192002-11-03 00:24:07 +000028
Jan Kiszka104d6fb2015-04-21 07:18:24 +020029#ifdef CONFIG_ARMV7_NONSEC
Andre Przywarabb975452013-09-19 18:06:43 +020030#include <asm/armv7.h>
31#endif
32
Wolfgang Denkd87080b2006-03-31 18:32:53 +020033DECLARE_GLOBAL_DATA_PTR;
34
wdenkc6097192002-11-03 00:24:07 +000035static struct tag *params;
John Rigby2d1916e2010-10-13 13:57:36 -060036
Simon Schwarz0a672d42012-03-15 04:01:45 +000037static ulong get_sp(void)
38{
39 ulong ret;
40
41 asm("mov %0, sp" : "=r"(ret) : );
42 return ret;
43}
44
John Rigby2d1916e2010-10-13 13:57:36 -060045void arch_lmb_reserve(struct lmb *lmb)
46{
47 ulong sp;
48
49 /*
50 * Booting a (Linux) kernel image
51 *
52 * Allocate space for command line and board info - the
53 * address should be as high as possible within the reach of
54 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
55 * memory, which means far enough below the current stack
56 * pointer.
57 */
58 sp = get_sp();
59 debug("## Current stack ends at 0x%08lx ", sp);
60
Rob Herringfcfa6962012-06-28 03:54:11 +000061 /* adjust sp by 4K to be safe */
62 sp -= 4096;
John Rigby2d1916e2010-10-13 13:57:36 -060063 lmb_reserve(lmb, sp,
64 gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
65}
66
Simon Glassbce1b922013-06-19 21:15:10 -070067/**
68 * announce_and_cleanup() - Print message and prepare for kernel boot
69 *
70 * @fake: non-zero to do everything except actually boot
71 */
72static void announce_and_cleanup(int fake)
Simon Schwarz0a672d42012-03-15 04:01:45 +000073{
Simon Glassbce1b922013-06-19 21:15:10 -070074 printf("\nStarting kernel ...%s\n\n", fake ?
75 "(fake run for tracing)" : "");
Simon Schwarz0a672d42012-03-15 04:01:45 +000076 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
Simon Glass94fd1312012-09-28 08:56:37 +000077#ifdef CONFIG_BOOTSTAGE_FDT
Mela Custodio91290cf2014-02-20 00:16:56 +090078 bootstage_fdt_add_report();
Simon Glass94fd1312012-09-28 08:56:37 +000079#endif
Simon Schwarz0a672d42012-03-15 04:01:45 +000080#ifdef CONFIG_BOOTSTAGE_REPORT
81 bootstage_report();
82#endif
83
84#ifdef CONFIG_USB_DEVICE
85 udc_disconnect();
86#endif
87 cleanup_before_linux();
88}
89
wdenk5779d8d2003-12-06 23:55:10 +000090static void setup_start_tag (bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +000091{
Simon Schwarz0a672d42012-03-15 04:01:45 +000092 params = (struct tag *)bd->bi_boot_params;
wdenkc6097192002-11-03 00:24:07 +000093
wdenk5779d8d2003-12-06 23:55:10 +000094 params->hdr.tag = ATAG_CORE;
95 params->hdr.size = tag_size (tag_core);
wdenkc6097192002-11-03 00:24:07 +000096
wdenk5779d8d2003-12-06 23:55:10 +000097 params->u.core.flags = 0;
98 params->u.core.pagesize = 0;
99 params->u.core.rootdev = 0;
wdenkc6097192002-11-03 00:24:07 +0000100
wdenk5779d8d2003-12-06 23:55:10 +0000101 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +0000102}
wdenkc6097192002-11-03 00:24:07 +0000103
Simon Schwarz0a672d42012-03-15 04:01:45 +0000104static void setup_memory_tags(bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +0000105{
wdenk5779d8d2003-12-06 23:55:10 +0000106 int i;
wdenkc6097192002-11-03 00:24:07 +0000107
wdenk5779d8d2003-12-06 23:55:10 +0000108 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
109 params->hdr.tag = ATAG_MEM;
110 params->hdr.size = tag_size (tag_mem32);
wdenkc6097192002-11-03 00:24:07 +0000111
wdenk5779d8d2003-12-06 23:55:10 +0000112 params->u.mem.start = bd->bi_dram[i].start;
113 params->u.mem.size = bd->bi_dram[i].size;
wdenkc6097192002-11-03 00:24:07 +0000114
wdenk5779d8d2003-12-06 23:55:10 +0000115 params = tag_next (params);
116 }
wdenkc6097192002-11-03 00:24:07 +0000117}
118
Simon Schwarz0a672d42012-03-15 04:01:45 +0000119static void setup_commandline_tag(bd_t *bd, char *commandline)
wdenkc6097192002-11-03 00:24:07 +0000120{
wdenk5779d8d2003-12-06 23:55:10 +0000121 char *p;
wdenkc6097192002-11-03 00:24:07 +0000122
wdenk109c0e32004-03-23 21:43:07 +0000123 if (!commandline)
124 return;
125
wdenk5779d8d2003-12-06 23:55:10 +0000126 /* eat leading white space */
127 for (p = commandline; *p == ' '; p++);
wdenkc6097192002-11-03 00:24:07 +0000128
wdenk5779d8d2003-12-06 23:55:10 +0000129 /* skip non-existent command lines so the kernel will still
130 * use its default command line.
131 */
132 if (*p == '\0')
133 return;
wdenkc6097192002-11-03 00:24:07 +0000134
wdenk5779d8d2003-12-06 23:55:10 +0000135 params->hdr.tag = ATAG_CMDLINE;
136 params->hdr.size =
137 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
wdenkc6097192002-11-03 00:24:07 +0000138
wdenk5779d8d2003-12-06 23:55:10 +0000139 strcpy (params->u.cmdline.cmdline, p);
wdenkc6097192002-11-03 00:24:07 +0000140
wdenk5779d8d2003-12-06 23:55:10 +0000141 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +0000142}
wdenkc6097192002-11-03 00:24:07 +0000143
Simon Schwarz0a672d42012-03-15 04:01:45 +0000144static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
wdenkc6097192002-11-03 00:24:07 +0000145{
wdenk5779d8d2003-12-06 23:55:10 +0000146 /* an ATAG_INITRD node tells the kernel where the compressed
147 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
148 */
wdenk498b8db2004-04-18 22:26:17 +0000149 params->hdr.tag = ATAG_INITRD2;
wdenk5779d8d2003-12-06 23:55:10 +0000150 params->hdr.size = tag_size (tag_initrd);
wdenkc6097192002-11-03 00:24:07 +0000151
wdenk5779d8d2003-12-06 23:55:10 +0000152 params->u.initrd.start = initrd_start;
153 params->u.initrd.size = initrd_end - initrd_start;
wdenkc6097192002-11-03 00:24:07 +0000154
wdenk5779d8d2003-12-06 23:55:10 +0000155 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +0000156}
wdenkc6097192002-11-03 00:24:07 +0000157
Simon Glassc19d13b2013-05-08 08:06:02 +0000158static void setup_serial_tag(struct tag **tmp)
wdenk3a574cb2005-05-19 22:39:42 +0000159{
160 struct tag *params = *tmp;
161 struct tag_serialnr serialnr;
wdenk3a574cb2005-05-19 22:39:42 +0000162
163 get_board_serial(&serialnr);
164 params->hdr.tag = ATAG_SERIAL;
165 params->hdr.size = tag_size (tag_serialnr);
166 params->u.serialnr.low = serialnr.low;
167 params->u.serialnr.high= serialnr.high;
168 params = tag_next (params);
169 *tmp = params;
170}
wdenk3a574cb2005-05-19 22:39:42 +0000171
Simon Glassc19d13b2013-05-08 08:06:02 +0000172static void setup_revision_tag(struct tag **in_params)
wdenk289f9322005-01-12 00:15:14 +0000173{
174 u32 rev = 0;
wdenk289f9322005-01-12 00:15:14 +0000175
176 rev = get_board_rev();
wdenk289f9322005-01-12 00:15:14 +0000177 params->hdr.tag = ATAG_REVISION;
178 params->hdr.size = tag_size (tag_revision);
179 params->u.revision.rev = rev;
180 params = tag_next (params);
181}
wdenk289f9322005-01-12 00:15:14 +0000182
Simon Schwarz0a672d42012-03-15 04:01:45 +0000183static void setup_end_tag(bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +0000184{
wdenk5779d8d2003-12-06 23:55:10 +0000185 params->hdr.tag = ATAG_NONE;
186 params->hdr.size = 0;
wdenkc6097192002-11-03 00:24:07 +0000187}
188
Pali Rohár89e6f132012-10-19 02:00:04 +0000189__weak void setup_board_tags(struct tag **in_params) {}
190
Marc Zyngierf510aea2014-07-12 14:24:03 +0100191#ifdef CONFIG_ARM64
Andre Przywarabb975452013-09-19 18:06:43 +0200192static void do_nonsec_virt_switch(void)
193{
David Feng0ae76532013-12-14 11:47:35 +0800194 smp_kick_all_cpus();
York Sundcd468b2015-01-06 13:18:42 -0800195 dcache_disable(); /* flush cache before swtiching to EL2 */
David Feng0ae76532013-12-14 11:47:35 +0800196 armv8_switch_to_el2();
197#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
198 armv8_switch_to_el1();
199#endif
Andre Przywarabb975452013-09-19 18:06:43 +0200200}
Marc Zyngierf510aea2014-07-12 14:24:03 +0100201#endif
Andre Przywarabb975452013-09-19 18:06:43 +0200202
Simon Schwarz0a672d42012-03-15 04:01:45 +0000203/* Subcommand: PREP */
204static void boot_prep_linux(bootm_headers_t *images)
205{
Simon Schwarz0a672d42012-03-15 04:01:45 +0000206 char *commandline = getenv("bootargs");
Simon Schwarz0a672d42012-03-15 04:01:45 +0000207
Simon Glassc19d13b2013-05-08 08:06:02 +0000208 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000209#ifdef CONFIG_OF_LIBFDT
Simon Schwarz0a672d42012-03-15 04:01:45 +0000210 debug("using: FDT\n");
Simon Glass6caa1952013-05-08 08:06:03 +0000211 if (image_setup_linux(images)) {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000212 printf("FDT creation failed! hanging...");
213 hang();
214 }
Simon Schwarz0a672d42012-03-15 04:01:45 +0000215#endif
Simon Glassc19d13b2013-05-08 08:06:02 +0000216 } else if (BOOTM_ENABLE_TAGS) {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000217 debug("using: ATAGS\n");
218 setup_start_tag(gd->bd);
Simon Glassc19d13b2013-05-08 08:06:02 +0000219 if (BOOTM_ENABLE_SERIAL_TAG)
220 setup_serial_tag(&params);
221 if (BOOTM_ENABLE_CMDLINE_TAG)
222 setup_commandline_tag(gd->bd, commandline);
223 if (BOOTM_ENABLE_REVISION_TAG)
224 setup_revision_tag(&params);
225 if (BOOTM_ENABLE_MEMORY_TAGS)
226 setup_memory_tags(gd->bd);
227 if (BOOTM_ENABLE_INITRD_TAG) {
Jeffy Chenf7ee0712016-01-14 10:19:36 +0800228 /*
229 * In boot_ramdisk_high(), it may relocate ramdisk to
230 * a specified location. And set images->initrd_start &
231 * images->initrd_end to relocated ramdisk's start/end
232 * addresses. So use them instead of images->rd_start &
233 * images->rd_end when possible.
234 */
235 if (images->initrd_start && images->initrd_end) {
236 setup_initrd_tag(gd->bd, images->initrd_start,
237 images->initrd_end);
238 } else if (images->rd_start && images->rd_end) {
Simon Glassc19d13b2013-05-08 08:06:02 +0000239 setup_initrd_tag(gd->bd, images->rd_start,
240 images->rd_end);
241 }
242 }
Pali Rohár89e6f132012-10-19 02:00:04 +0000243 setup_board_tags(&params);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000244 setup_end_tag(gd->bd);
Simon Glassc19d13b2013-05-08 08:06:02 +0000245 } else {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000246 printf("FDT and ATAGS support not compiled in - hanging\n");
247 hang();
Simon Schwarz0a672d42012-03-15 04:01:45 +0000248 }
249}
250
Jan Kiszka104d6fb2015-04-21 07:18:24 +0200251#ifdef CONFIG_ARMV7_NONSEC
Ian Campbell97a81962014-12-21 09:45:11 +0000252bool armv7_boot_nonsec(void)
Hans de Goede8bc347e2014-11-14 09:34:31 +0100253{
254 char *s = getenv("bootm_boot_mode");
255#ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT
256 bool nonsec = false;
257#else
258 bool nonsec = true;
259#endif
260
261 if (s && !strcmp(s, "sec"))
262 nonsec = false;
263
264 if (s && !strcmp(s, "nonsec"))
265 nonsec = true;
266
267 return nonsec;
268}
269#endif
270
Simon Schwarz0a672d42012-03-15 04:01:45 +0000271/* Subcommand: GO */
Simon Glassbce1b922013-06-19 21:15:10 -0700272static void boot_jump_linux(bootm_headers_t *images, int flag)
Simon Schwarz0a672d42012-03-15 04:01:45 +0000273{
David Feng0ae76532013-12-14 11:47:35 +0800274#ifdef CONFIG_ARM64
Tom Rini3f1b6be2014-08-14 06:42:35 -0400275 void (*kernel_entry)(void *fdt_addr, void *res0, void *res1,
276 void *res2);
David Feng0ae76532013-12-14 11:47:35 +0800277 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
278
Tom Rini3f1b6be2014-08-14 06:42:35 -0400279 kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1,
280 void *res2))images->ep;
David Feng0ae76532013-12-14 11:47:35 +0800281
282 debug("## Transferring control to Linux (at address %lx)...\n",
283 (ulong) kernel_entry);
284 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
285
286 announce_and_cleanup(fake);
287
Marc Zyngierc19e0dd2014-07-12 14:23:58 +0100288 if (!fake) {
289 do_nonsec_virt_switch();
Tom Rini3f1b6be2014-08-14 06:42:35 -0400290 kernel_entry(images->ft_addr, NULL, NULL, NULL);
Marc Zyngierc19e0dd2014-07-12 14:23:58 +0100291 }
David Feng0ae76532013-12-14 11:47:35 +0800292#else
Simon Schwarz0a672d42012-03-15 04:01:45 +0000293 unsigned long machid = gd->bd->bi_arch_number;
294 char *s;
295 void (*kernel_entry)(int zero, int arch, uint params);
Stephen Warren17239972012-04-19 11:34:00 +0000296 unsigned long r2;
Simon Glassbce1b922013-06-19 21:15:10 -0700297 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000298
299 kernel_entry = (void (*)(int, int, uint))images->ep;
300
301 s = getenv("machid");
302 if (s) {
Peng Fanbc3c89b2015-11-24 16:54:20 +0800303 if (strict_strtoul(s, 16, &machid) < 0) {
304 debug("strict_strtoul failed!\n");
305 return;
306 }
Simon Schwarz0a672d42012-03-15 04:01:45 +0000307 printf("Using machid 0x%lx from environment\n", machid);
308 }
309
310 debug("## Transferring control to Linux (at address %08lx)" \
311 "...\n", (ulong) kernel_entry);
312 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
Simon Glassbce1b922013-06-19 21:15:10 -0700313 announce_and_cleanup(fake);
Stephen Warren17239972012-04-19 11:34:00 +0000314
Simon Glassc19d13b2013-05-08 08:06:02 +0000315 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
Stephen Warren17239972012-04-19 11:34:00 +0000316 r2 = (unsigned long)images->ft_addr;
317 else
Stephen Warren17239972012-04-19 11:34:00 +0000318 r2 = gd->bd->bi_boot_params;
319
Marc Zyngierc19e0dd2014-07-12 14:23:58 +0100320 if (!fake) {
Jan Kiszka104d6fb2015-04-21 07:18:24 +0200321#ifdef CONFIG_ARMV7_NONSEC
Ian Campbell97a81962014-12-21 09:45:11 +0000322 if (armv7_boot_nonsec()) {
Hans de Goede8bc347e2014-11-14 09:34:31 +0100323 armv7_init_nonsec();
324 secure_ram_addr(_do_nonsec_entry)(kernel_entry,
325 0, machid, r2);
326 } else
Marc Zyngierf510aea2014-07-12 14:24:03 +0100327#endif
Hans de Goede8bc347e2014-11-14 09:34:31 +0100328 kernel_entry(0, machid, r2);
Marc Zyngierc19e0dd2014-07-12 14:23:58 +0100329 }
David Feng0ae76532013-12-14 11:47:35 +0800330#endif
Simon Schwarz0a672d42012-03-15 04:01:45 +0000331}
332
333/* Main Entry point for arm bootm implementation
334 *
335 * Modeled after the powerpc implementation
336 * DIFFERENCE: Instead of calling prep and go at the end
337 * they are called if subcommand is equal 0.
338 */
Eric Nelson8d196e52014-09-30 15:40:01 -0700339int do_bootm_linux(int flag, int argc, char * const argv[],
340 bootm_headers_t *images)
Simon Schwarz0a672d42012-03-15 04:01:45 +0000341{
342 /* No need for those on ARM */
343 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
344 return -1;
345
346 if (flag & BOOTM_STATE_OS_PREP) {
347 boot_prep_linux(images);
348 return 0;
349 }
350
Simon Glassbce1b922013-06-19 21:15:10 -0700351 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
352 boot_jump_linux(images, flag);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000353 return 0;
354 }
355
356 boot_prep_linux(images);
Simon Glassbce1b922013-06-19 21:15:10 -0700357 boot_jump_linux(images, flag);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000358 return 0;
John Rigby2d1916e2010-10-13 13:57:36 -0600359}
Marek Vasut44f074c2012-03-14 21:52:45 +0000360
Miao Yan871a57b2013-11-28 17:51:38 +0800361#if defined(CONFIG_BOOTM_VXWORKS)
362void boot_prep_vxworks(bootm_headers_t *images)
363{
364#if defined(CONFIG_OF_LIBFDT)
365 int off;
366
367 if (images->ft_addr) {
368 off = fdt_path_offset(images->ft_addr, "/memory");
369 if (off < 0) {
Michal Simeke2f88df2016-07-28 09:06:41 +0200370#ifdef CONFIG_ARCH_FIXUP_FDT
Ma Haijune29607e2014-07-12 14:24:06 +0100371 if (arch_fixup_fdt(images->ft_addr))
Miao Yan871a57b2013-11-28 17:51:38 +0800372 puts("## WARNING: fixup memory failed!\n");
Michal Simeke2f88df2016-07-28 09:06:41 +0200373#endif
Miao Yan871a57b2013-11-28 17:51:38 +0800374 }
375 }
376#endif
377 cleanup_before_linux();
378}
379void boot_jump_vxworks(bootm_headers_t *images)
380{
381 /* ARM VxWorks requires device tree physical address to be passed */
382 ((void (*)(void *))images->ep)(images->ft_addr);
383}
384#endif