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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>
21#include <fdt_support.h>
Simon Schwarz0a672d42012-03-15 04:01:45 +000022#include <asm/bootm.h>
Pali Rohár89e6f132012-10-19 02:00:04 +000023#include <linux/compiler.h>
wdenkc6097192002-11-03 00:24:07 +000024
Andre Przywarad4296882013-09-19 18:06:45 +020025#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
Andre Przywarabb975452013-09-19 18:06:43 +020026#include <asm/armv7.h>
27#endif
28
Wolfgang Denkd87080b2006-03-31 18:32:53 +020029DECLARE_GLOBAL_DATA_PTR;
30
wdenkc6097192002-11-03 00:24:07 +000031static struct tag *params;
John Rigby2d1916e2010-10-13 13:57:36 -060032
Simon Schwarz0a672d42012-03-15 04:01:45 +000033static ulong get_sp(void)
34{
35 ulong ret;
36
37 asm("mov %0, sp" : "=r"(ret) : );
38 return ret;
39}
40
John Rigby2d1916e2010-10-13 13:57:36 -060041void arch_lmb_reserve(struct lmb *lmb)
42{
43 ulong sp;
44
45 /*
46 * Booting a (Linux) kernel image
47 *
48 * Allocate space for command line and board info - the
49 * address should be as high as possible within the reach of
50 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
51 * memory, which means far enough below the current stack
52 * pointer.
53 */
54 sp = get_sp();
55 debug("## Current stack ends at 0x%08lx ", sp);
56
Rob Herringfcfa6962012-06-28 03:54:11 +000057 /* adjust sp by 4K to be safe */
58 sp -= 4096;
John Rigby2d1916e2010-10-13 13:57:36 -060059 lmb_reserve(lmb, sp,
60 gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
61}
62
Simon Glassbce1b922013-06-19 21:15:10 -070063/**
64 * announce_and_cleanup() - Print message and prepare for kernel boot
65 *
66 * @fake: non-zero to do everything except actually boot
67 */
68static void announce_and_cleanup(int fake)
Simon Schwarz0a672d42012-03-15 04:01:45 +000069{
Simon Glassbce1b922013-06-19 21:15:10 -070070 printf("\nStarting kernel ...%s\n\n", fake ?
71 "(fake run for tracing)" : "");
Simon Schwarz0a672d42012-03-15 04:01:45 +000072 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
Simon Glass94fd1312012-09-28 08:56:37 +000073#ifdef CONFIG_BOOTSTAGE_FDT
Simon Glassbce1b922013-06-19 21:15:10 -070074 if (flag == BOOTM_STATE_OS_FAKE_GO)
75 bootstage_fdt_add_report();
Simon Glass94fd1312012-09-28 08:56:37 +000076#endif
Simon Schwarz0a672d42012-03-15 04:01:45 +000077#ifdef CONFIG_BOOTSTAGE_REPORT
78 bootstage_report();
79#endif
80
81#ifdef CONFIG_USB_DEVICE
82 udc_disconnect();
83#endif
84 cleanup_before_linux();
85}
86
wdenk5779d8d2003-12-06 23:55:10 +000087static void setup_start_tag (bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +000088{
Simon Schwarz0a672d42012-03-15 04:01:45 +000089 params = (struct tag *)bd->bi_boot_params;
wdenkc6097192002-11-03 00:24:07 +000090
wdenk5779d8d2003-12-06 23:55:10 +000091 params->hdr.tag = ATAG_CORE;
92 params->hdr.size = tag_size (tag_core);
wdenkc6097192002-11-03 00:24:07 +000093
wdenk5779d8d2003-12-06 23:55:10 +000094 params->u.core.flags = 0;
95 params->u.core.pagesize = 0;
96 params->u.core.rootdev = 0;
wdenkc6097192002-11-03 00:24:07 +000097
wdenk5779d8d2003-12-06 23:55:10 +000098 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +000099}
wdenkc6097192002-11-03 00:24:07 +0000100
Simon Schwarz0a672d42012-03-15 04:01:45 +0000101static void setup_memory_tags(bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +0000102{
wdenk5779d8d2003-12-06 23:55:10 +0000103 int i;
wdenkc6097192002-11-03 00:24:07 +0000104
wdenk5779d8d2003-12-06 23:55:10 +0000105 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
106 params->hdr.tag = ATAG_MEM;
107 params->hdr.size = tag_size (tag_mem32);
wdenkc6097192002-11-03 00:24:07 +0000108
wdenk5779d8d2003-12-06 23:55:10 +0000109 params->u.mem.start = bd->bi_dram[i].start;
110 params->u.mem.size = bd->bi_dram[i].size;
wdenkc6097192002-11-03 00:24:07 +0000111
wdenk5779d8d2003-12-06 23:55:10 +0000112 params = tag_next (params);
113 }
wdenkc6097192002-11-03 00:24:07 +0000114}
115
Simon Schwarz0a672d42012-03-15 04:01:45 +0000116static void setup_commandline_tag(bd_t *bd, char *commandline)
wdenkc6097192002-11-03 00:24:07 +0000117{
wdenk5779d8d2003-12-06 23:55:10 +0000118 char *p;
wdenkc6097192002-11-03 00:24:07 +0000119
wdenk109c0e32004-03-23 21:43:07 +0000120 if (!commandline)
121 return;
122
wdenk5779d8d2003-12-06 23:55:10 +0000123 /* eat leading white space */
124 for (p = commandline; *p == ' '; p++);
wdenkc6097192002-11-03 00:24:07 +0000125
wdenk5779d8d2003-12-06 23:55:10 +0000126 /* skip non-existent command lines so the kernel will still
127 * use its default command line.
128 */
129 if (*p == '\0')
130 return;
wdenkc6097192002-11-03 00:24:07 +0000131
wdenk5779d8d2003-12-06 23:55:10 +0000132 params->hdr.tag = ATAG_CMDLINE;
133 params->hdr.size =
134 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
wdenkc6097192002-11-03 00:24:07 +0000135
wdenk5779d8d2003-12-06 23:55:10 +0000136 strcpy (params->u.cmdline.cmdline, p);
wdenkc6097192002-11-03 00:24:07 +0000137
wdenk5779d8d2003-12-06 23:55:10 +0000138 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +0000139}
wdenkc6097192002-11-03 00:24:07 +0000140
Simon Schwarz0a672d42012-03-15 04:01:45 +0000141static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
wdenkc6097192002-11-03 00:24:07 +0000142{
wdenk5779d8d2003-12-06 23:55:10 +0000143 /* an ATAG_INITRD node tells the kernel where the compressed
144 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
145 */
wdenk498b8db2004-04-18 22:26:17 +0000146 params->hdr.tag = ATAG_INITRD2;
wdenk5779d8d2003-12-06 23:55:10 +0000147 params->hdr.size = tag_size (tag_initrd);
wdenkc6097192002-11-03 00:24:07 +0000148
wdenk5779d8d2003-12-06 23:55:10 +0000149 params->u.initrd.start = initrd_start;
150 params->u.initrd.size = initrd_end - initrd_start;
wdenkc6097192002-11-03 00:24:07 +0000151
wdenk5779d8d2003-12-06 23:55:10 +0000152 params = tag_next (params);
wdenkc6097192002-11-03 00:24:07 +0000153}
wdenkc6097192002-11-03 00:24:07 +0000154
Simon Glassc19d13b2013-05-08 08:06:02 +0000155static void setup_serial_tag(struct tag **tmp)
wdenk3a574cb2005-05-19 22:39:42 +0000156{
157 struct tag *params = *tmp;
158 struct tag_serialnr serialnr;
wdenk3a574cb2005-05-19 22:39:42 +0000159
160 get_board_serial(&serialnr);
161 params->hdr.tag = ATAG_SERIAL;
162 params->hdr.size = tag_size (tag_serialnr);
163 params->u.serialnr.low = serialnr.low;
164 params->u.serialnr.high= serialnr.high;
165 params = tag_next (params);
166 *tmp = params;
167}
wdenk3a574cb2005-05-19 22:39:42 +0000168
Simon Glassc19d13b2013-05-08 08:06:02 +0000169static void setup_revision_tag(struct tag **in_params)
wdenk289f9322005-01-12 00:15:14 +0000170{
171 u32 rev = 0;
wdenk289f9322005-01-12 00:15:14 +0000172
173 rev = get_board_rev();
wdenk289f9322005-01-12 00:15:14 +0000174 params->hdr.tag = ATAG_REVISION;
175 params->hdr.size = tag_size (tag_revision);
176 params->u.revision.rev = rev;
177 params = tag_next (params);
178}
wdenk289f9322005-01-12 00:15:14 +0000179
Simon Schwarz0a672d42012-03-15 04:01:45 +0000180static void setup_end_tag(bd_t *bd)
wdenkc6097192002-11-03 00:24:07 +0000181{
wdenk5779d8d2003-12-06 23:55:10 +0000182 params->hdr.tag = ATAG_NONE;
183 params->hdr.size = 0;
wdenkc6097192002-11-03 00:24:07 +0000184}
185
Pali Rohár89e6f132012-10-19 02:00:04 +0000186__weak void setup_board_tags(struct tag **in_params) {}
187
Andre Przywarabb975452013-09-19 18:06:43 +0200188static void do_nonsec_virt_switch(void)
189{
190#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
191 if (armv7_switch_nonsec() == 0)
Andre Przywarad4296882013-09-19 18:06:45 +0200192#ifdef CONFIG_ARMV7_VIRT
193 if (armv7_switch_hyp() == 0)
194 debug("entered HYP mode\n");
195#else
Andre Przywarabb975452013-09-19 18:06:43 +0200196 debug("entered non-secure state\n");
197#endif
Andre Przywarad4296882013-09-19 18:06:45 +0200198#endif
Andre Przywarabb975452013-09-19 18:06:43 +0200199}
200
Simon Schwarz0a672d42012-03-15 04:01:45 +0000201/* Subcommand: PREP */
202static void boot_prep_linux(bootm_headers_t *images)
203{
Simon Schwarz0a672d42012-03-15 04:01:45 +0000204 char *commandline = getenv("bootargs");
Simon Schwarz0a672d42012-03-15 04:01:45 +0000205
Simon Glassc19d13b2013-05-08 08:06:02 +0000206 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000207#ifdef CONFIG_OF_LIBFDT
Simon Schwarz0a672d42012-03-15 04:01:45 +0000208 debug("using: FDT\n");
Simon Glass6caa1952013-05-08 08:06:03 +0000209 if (image_setup_linux(images)) {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000210 printf("FDT creation failed! hanging...");
211 hang();
212 }
Simon Schwarz0a672d42012-03-15 04:01:45 +0000213#endif
Simon Glassc19d13b2013-05-08 08:06:02 +0000214 } else if (BOOTM_ENABLE_TAGS) {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000215 debug("using: ATAGS\n");
216 setup_start_tag(gd->bd);
Simon Glassc19d13b2013-05-08 08:06:02 +0000217 if (BOOTM_ENABLE_SERIAL_TAG)
218 setup_serial_tag(&params);
219 if (BOOTM_ENABLE_CMDLINE_TAG)
220 setup_commandline_tag(gd->bd, commandline);
221 if (BOOTM_ENABLE_REVISION_TAG)
222 setup_revision_tag(&params);
223 if (BOOTM_ENABLE_MEMORY_TAGS)
224 setup_memory_tags(gd->bd);
225 if (BOOTM_ENABLE_INITRD_TAG) {
226 if (images->rd_start && images->rd_end) {
227 setup_initrd_tag(gd->bd, images->rd_start,
228 images->rd_end);
229 }
230 }
Pali Rohár89e6f132012-10-19 02:00:04 +0000231 setup_board_tags(&params);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000232 setup_end_tag(gd->bd);
Simon Glassc19d13b2013-05-08 08:06:02 +0000233 } else {
Simon Schwarz0a672d42012-03-15 04:01:45 +0000234 printf("FDT and ATAGS support not compiled in - hanging\n");
235 hang();
Simon Schwarz0a672d42012-03-15 04:01:45 +0000236 }
Andre Przywarabb975452013-09-19 18:06:43 +0200237 do_nonsec_virt_switch();
Simon Schwarz0a672d42012-03-15 04:01:45 +0000238}
239
240/* Subcommand: GO */
Simon Glassbce1b922013-06-19 21:15:10 -0700241static void boot_jump_linux(bootm_headers_t *images, int flag)
Simon Schwarz0a672d42012-03-15 04:01:45 +0000242{
243 unsigned long machid = gd->bd->bi_arch_number;
244 char *s;
245 void (*kernel_entry)(int zero, int arch, uint params);
Stephen Warren17239972012-04-19 11:34:00 +0000246 unsigned long r2;
Simon Glassbce1b922013-06-19 21:15:10 -0700247 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000248
249 kernel_entry = (void (*)(int, int, uint))images->ep;
250
251 s = getenv("machid");
252 if (s) {
253 strict_strtoul(s, 16, &machid);
254 printf("Using machid 0x%lx from environment\n", machid);
255 }
256
257 debug("## Transferring control to Linux (at address %08lx)" \
258 "...\n", (ulong) kernel_entry);
259 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
Simon Glassbce1b922013-06-19 21:15:10 -0700260 announce_and_cleanup(fake);
Stephen Warren17239972012-04-19 11:34:00 +0000261
Simon Glassc19d13b2013-05-08 08:06:02 +0000262 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
Stephen Warren17239972012-04-19 11:34:00 +0000263 r2 = (unsigned long)images->ft_addr;
264 else
Stephen Warren17239972012-04-19 11:34:00 +0000265 r2 = gd->bd->bi_boot_params;
266
Simon Glassbce1b922013-06-19 21:15:10 -0700267 if (!fake)
268 kernel_entry(0, machid, r2);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000269}
270
271/* Main Entry point for arm bootm implementation
272 *
273 * Modeled after the powerpc implementation
274 * DIFFERENCE: Instead of calling prep and go at the end
275 * they are called if subcommand is equal 0.
276 */
277int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
278{
279 /* No need for those on ARM */
280 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
281 return -1;
282
283 if (flag & BOOTM_STATE_OS_PREP) {
284 boot_prep_linux(images);
285 return 0;
286 }
287
Simon Glassbce1b922013-06-19 21:15:10 -0700288 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
289 boot_jump_linux(images, flag);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000290 return 0;
291 }
292
293 boot_prep_linux(images);
Simon Glassbce1b922013-06-19 21:15:10 -0700294 boot_jump_linux(images, flag);
Simon Schwarz0a672d42012-03-15 04:01:45 +0000295 return 0;
John Rigby2d1916e2010-10-13 13:57:36 -0600296}
Marek Vasut44f074c2012-03-14 21:52:45 +0000297
298#ifdef CONFIG_CMD_BOOTZ
299
300struct zimage_header {
301 uint32_t code[9];
302 uint32_t zi_magic;
303 uint32_t zi_start;
304 uint32_t zi_end;
305};
306
307#define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818
308
Simon Glassa5266d62013-07-04 13:26:10 -0700309int bootz_setup(ulong image, ulong *start, ulong *end)
Marek Vasut44f074c2012-03-14 21:52:45 +0000310{
Simon Glassa5266d62013-07-04 13:26:10 -0700311 struct zimage_header *zi;
Marek Vasut44f074c2012-03-14 21:52:45 +0000312
Simon Glassa5266d62013-07-04 13:26:10 -0700313 zi = (struct zimage_header *)map_sysmem(image, 0);
Marek Vasut44f074c2012-03-14 21:52:45 +0000314 if (zi->zi_magic != LINUX_ARM_ZIMAGE_MAGIC) {
315 puts("Bad Linux ARM zImage magic!\n");
316 return 1;
317 }
318
Simon Glassa5266d62013-07-04 13:26:10 -0700319 *start = zi->zi_start;
320 *end = zi->zi_end;
Marek Vasut44f074c2012-03-14 21:52:45 +0000321
Simon Glassa5266d62013-07-04 13:26:10 -0700322 printf("Kernel image @ %#08lx [ %#08lx - %#08lx ]\n", image, *start,
323 *end);
Marek Vasut44f074c2012-03-14 21:52:45 +0000324
325 return 0;
326}
Simon Glassa5266d62013-07-04 13:26:10 -0700327
Marek Vasut44f074c2012-03-14 21:52:45 +0000328#endif /* CONFIG_CMD_BOOTZ */