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Tom Rini10e47792018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
wdenk591dda52002-11-18 00:14:45 +00002/*
Gabe Black1cf51212011-12-05 12:09:23 +00003 * Copyright (c) 2011 The Chromium OS Authors.
wdenk591dda52002-11-18 00:14:45 +00004 * (C) Copyright 2002
Albert ARIBAUD60fbc8d2011-08-04 18:45:45 +02005 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
wdenk591dda52002-11-18 00:14:45 +00006 */
7
wdenk57b2d802003-06-27 21:31:46 +00008/*
Graeme Russ45fc1d82011-04-13 19:43:26 +10009 * Linux x86 zImage and bzImage loading
wdenk57b2d802003-06-27 21:31:46 +000010 *
11 * based on the procdure described in
wdenk591dda52002-11-18 00:14:45 +000012 * linux/Documentation/i386/boot.txt
13 */
14
15#include <common.h>
Simon Glass83c2e492019-08-01 09:46:50 -060016#include <env.h>
Ivan Gorinov901bb0b2018-03-26 18:06:54 -070017#include <malloc.h>
Bin Menge1029252018-01-30 05:01:16 -080018#include <asm/acpi_table.h>
wdenk591dda52002-11-18 00:14:45 +000019#include <asm/io.h>
20#include <asm/ptrace.h>
21#include <asm/zimage.h>
wdenk591dda52002-11-18 00:14:45 +000022#include <asm/byteorder.h>
Simon Glassaa83f2b2014-10-19 21:11:20 -060023#include <asm/bootm.h>
Graeme Russ1bab1042010-04-24 00:05:49 +100024#include <asm/bootparam.h>
Vadim Bendebury8cd22c82012-10-23 18:04:34 +000025#ifdef CONFIG_SYS_COREBOOT
26#include <asm/arch/timestamp.h>
27#endif
Stefan Reinauer2e5225e2012-10-23 18:04:37 +000028#include <linux/compiler.h>
Ivan Gorinov901bb0b2018-03-26 18:06:54 -070029#include <linux/libfdt.h>
wdenk591dda52002-11-18 00:14:45 +000030
31/*
32 * Memory lay-out:
wdenk57b2d802003-06-27 21:31:46 +000033 *
wdenk591dda52002-11-18 00:14:45 +000034 * relative to setup_base (which is 0x90000 currently)
wdenk57b2d802003-06-27 21:31:46 +000035 *
36 * 0x0000-0x7FFF Real mode kernel
wdenk591dda52002-11-18 00:14:45 +000037 * 0x8000-0x8FFF Stack and heap
38 * 0x9000-0x90FF Kernel command line
39 */
Graeme Russ883c6032011-11-08 02:33:15 +000040#define DEFAULT_SETUP_BASE 0x90000
41#define COMMAND_LINE_OFFSET 0x9000
42#define HEAP_END_OFFSET 0x8e00
wdenk591dda52002-11-18 00:14:45 +000043
Graeme Russ883c6032011-11-08 02:33:15 +000044#define COMMAND_LINE_SIZE 2048
wdenk591dda52002-11-18 00:14:45 +000045
46static void build_command_line(char *command_line, int auto_boot)
47{
48 char *env_command_line;
wdenk57b2d802003-06-27 21:31:46 +000049
wdenk591dda52002-11-18 00:14:45 +000050 command_line[0] = '\0';
wdenk57b2d802003-06-27 21:31:46 +000051
Simon Glass64b723f2017-08-03 12:22:12 -060052 env_command_line = env_get("bootargs");
wdenk57b2d802003-06-27 21:31:46 +000053
wdenk591dda52002-11-18 00:14:45 +000054 /* set console= argument if we use a serial console */
Graeme Russ883c6032011-11-08 02:33:15 +000055 if (!strstr(env_command_line, "console=")) {
Simon Glass64b723f2017-08-03 12:22:12 -060056 if (!strcmp(env_get("stdout"), "serial")) {
wdenk57b2d802003-06-27 21:31:46 +000057
wdenk591dda52002-11-18 00:14:45 +000058 /* We seem to use serial console */
wdenk57b2d802003-06-27 21:31:46 +000059 sprintf(command_line, "console=ttyS0,%s ",
Simon Glass64b723f2017-08-03 12:22:12 -060060 env_get("baudrate"));
wdenk591dda52002-11-18 00:14:45 +000061 }
62 }
wdenk57b2d802003-06-27 21:31:46 +000063
Graeme Russ883c6032011-11-08 02:33:15 +000064 if (auto_boot)
wdenk591dda52002-11-18 00:14:45 +000065 strcat(command_line, "auto ");
wdenk57b2d802003-06-27 21:31:46 +000066
Graeme Russ883c6032011-11-08 02:33:15 +000067 if (env_command_line)
wdenk591dda52002-11-18 00:14:45 +000068 strcat(command_line, env_command_line);
wdenk57b2d802003-06-27 21:31:46 +000069
wdenk591dda52002-11-18 00:14:45 +000070 printf("Kernel command line: \"%s\"\n", command_line);
71}
72
Gabe Black540c2622011-12-05 12:09:26 +000073static int kernel_magic_ok(struct setup_header *hdr)
wdenk591dda52002-11-18 00:14:45 +000074{
Graeme Russ1bab1042010-04-24 00:05:49 +100075 if (KERNEL_MAGIC != hdr->boot_flag) {
Gabe Black1cf51212011-12-05 12:09:23 +000076 printf("Error: Invalid Boot Flag "
77 "(found 0x%04x, expected 0x%04x)\n",
78 hdr->boot_flag, KERNEL_MAGIC);
wdenk591dda52002-11-18 00:14:45 +000079 return 0;
Graeme Russ1bab1042010-04-24 00:05:49 +100080 } else {
81 printf("Valid Boot Flag\n");
Gabe Black540c2622011-12-05 12:09:26 +000082 return 1;
wdenk591dda52002-11-18 00:14:45 +000083 }
Gabe Black540c2622011-12-05 12:09:26 +000084}
wdenk57b2d802003-06-27 21:31:46 +000085
Gabe Black540c2622011-12-05 12:09:26 +000086static int get_boot_protocol(struct setup_header *hdr)
87{
88 if (hdr->header == KERNEL_V2_MAGIC) {
Graeme Russ1bab1042010-04-24 00:05:49 +100089 printf("Magic signature found\n");
Gabe Black540c2622011-12-05 12:09:26 +000090 return hdr->version;
wdenk591dda52002-11-18 00:14:45 +000091 } else {
92 /* Very old kernel */
Graeme Russ1bab1042010-04-24 00:05:49 +100093 printf("Magic signature not found\n");
Gabe Black540c2622011-12-05 12:09:26 +000094 return 0x0100;
wdenk591dda52002-11-18 00:14:45 +000095 }
Gabe Black540c2622011-12-05 12:09:26 +000096}
97
Ivan Gorinov901bb0b2018-03-26 18:06:54 -070098static int setup_device_tree(struct setup_header *hdr, const void *fdt_blob)
99{
100 int bootproto = get_boot_protocol(hdr);
101 struct setup_data *sd;
102 int size;
103
104 if (bootproto < 0x0209)
105 return -ENOTSUPP;
106
107 if (!fdt_blob)
108 return 0;
109
110 size = fdt_totalsize(fdt_blob);
111 if (size < 0)
112 return -EINVAL;
113
114 size += sizeof(struct setup_data);
115 sd = (struct setup_data *)malloc(size);
116 if (!sd) {
117 printf("Not enough memory for DTB setup data\n");
118 return -ENOMEM;
119 }
120
121 sd->next = hdr->setup_data;
122 sd->type = SETUP_DTB;
123 sd->len = fdt_totalsize(fdt_blob);
124 memcpy(sd->data, fdt_blob, sd->len);
125 hdr->setup_data = (unsigned long)sd;
126
127 return 0;
128}
129
Gabe Black540c2622011-12-05 12:09:26 +0000130struct boot_params *load_zimage(char *image, unsigned long kernel_size,
Simon Glassd98a5bd2014-10-10 08:21:56 -0600131 ulong *load_addressp)
Gabe Black540c2622011-12-05 12:09:26 +0000132{
133 struct boot_params *setup_base;
134 int setup_size;
135 int bootproto;
136 int big_image;
137
138 struct boot_params *params = (struct boot_params *)image;
139 struct setup_header *hdr = &params->hdr;
140
141 /* base address for real-mode segment */
142 setup_base = (struct boot_params *)DEFAULT_SETUP_BASE;
143
144 if (!kernel_magic_ok(hdr))
145 return 0;
wdenk57b2d802003-06-27 21:31:46 +0000146
wdenk591dda52002-11-18 00:14:45 +0000147 /* determine size of setup */
Graeme Russ1bab1042010-04-24 00:05:49 +1000148 if (0 == hdr->setup_sects) {
149 printf("Setup Sectors = 0 (defaulting to 4)\n");
wdenk591dda52002-11-18 00:14:45 +0000150 setup_size = 5 * 512;
151 } else {
Graeme Russ1bab1042010-04-24 00:05:49 +1000152 setup_size = (hdr->setup_sects + 1) * 512;
wdenk591dda52002-11-18 00:14:45 +0000153 }
wdenk57b2d802003-06-27 21:31:46 +0000154
Graeme Russ1bab1042010-04-24 00:05:49 +1000155 printf("Setup Size = 0x%8.8lx\n", (ulong)setup_size);
156
Graeme Russ883c6032011-11-08 02:33:15 +0000157 if (setup_size > SETUP_MAX_SIZE)
wdenk591dda52002-11-18 00:14:45 +0000158 printf("Error: Setup is too large (%d bytes)\n", setup_size);
wdenk57b2d802003-06-27 21:31:46 +0000159
Gabe Black540c2622011-12-05 12:09:26 +0000160 /* determine boot protocol version */
161 bootproto = get_boot_protocol(hdr);
162
163 printf("Using boot protocol version %x.%02x\n",
164 (bootproto & 0xff00) >> 8, bootproto & 0xff);
165
166 if (bootproto >= 0x0200) {
167 if (hdr->setup_sects >= 15) {
168 printf("Linux kernel version %s\n",
169 (char *)params +
170 hdr->kernel_version + 0x200);
171 } else {
172 printf("Setup Sectors < 15 - "
173 "Cannot print kernel version.\n");
174 }
175 }
176
wdenk591dda52002-11-18 00:14:45 +0000177 /* Determine image type */
Graeme Russ883c6032011-11-08 02:33:15 +0000178 big_image = (bootproto >= 0x0200) &&
179 (hdr->loadflags & BIG_KERNEL_FLAG);
wdenk57b2d802003-06-27 21:31:46 +0000180
Graeme Russ1bab1042010-04-24 00:05:49 +1000181 /* Determine load address */
Gabe Black1cf51212011-12-05 12:09:23 +0000182 if (big_image)
Simon Glassd98a5bd2014-10-10 08:21:56 -0600183 *load_addressp = BZIMAGE_LOAD_ADDR;
Gabe Black1cf51212011-12-05 12:09:23 +0000184 else
Simon Glassd98a5bd2014-10-10 08:21:56 -0600185 *load_addressp = ZIMAGE_LOAD_ADDR;
wdenk57b2d802003-06-27 21:31:46 +0000186
Gabe Blackc67a9482011-12-05 12:09:24 +0000187 printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base);
188 memset(setup_base, 0, sizeof(*setup_base));
189 setup_base->hdr = params->hdr;
wdenk57b2d802003-06-27 21:31:46 +0000190
Gabe Black540c2622011-12-05 12:09:26 +0000191 if (bootproto >= 0x0204)
192 kernel_size = hdr->syssize * 16;
193 else
194 kernel_size -= setup_size;
wdenk57b2d802003-06-27 21:31:46 +0000195
wdenk57b2d802003-06-27 21:31:46 +0000196 if (bootproto == 0x0100) {
Graeme Russ883c6032011-11-08 02:33:15 +0000197 /*
198 * A very old kernel MUST have its real-mode code
199 * loaded at 0x90000
200 */
Simon Glassca37a392017-01-16 07:03:35 -0700201 if ((ulong)setup_base != 0x90000) {
wdenk591dda52002-11-18 00:14:45 +0000202 /* Copy the real-mode kernel */
Graeme Russ883c6032011-11-08 02:33:15 +0000203 memmove((void *)0x90000, setup_base, setup_size);
204
wdenk591dda52002-11-18 00:14:45 +0000205 /* Copy the command line */
Graeme Russ883c6032011-11-08 02:33:15 +0000206 memmove((void *)0x99000,
Gabe Black1cf51212011-12-05 12:09:23 +0000207 (u8 *)setup_base + COMMAND_LINE_OFFSET,
Graeme Russ883c6032011-11-08 02:33:15 +0000208 COMMAND_LINE_SIZE);
wdenk57b2d802003-06-27 21:31:46 +0000209
Graeme Russ883c6032011-11-08 02:33:15 +0000210 /* Relocated */
Gabe Black1cf51212011-12-05 12:09:23 +0000211 setup_base = (struct boot_params *)0x90000;
wdenk591dda52002-11-18 00:14:45 +0000212 }
wdenk57b2d802003-06-27 21:31:46 +0000213
wdenk591dda52002-11-18 00:14:45 +0000214 /* It is recommended to clear memory up to the 32K mark */
Gabe Black1cf51212011-12-05 12:09:23 +0000215 memset((u8 *)0x90000 + setup_size, 0,
216 SETUP_MAX_SIZE - setup_size);
wdenk591dda52002-11-18 00:14:45 +0000217 }
wdenk57b2d802003-06-27 21:31:46 +0000218
Gabe Black540c2622011-12-05 12:09:26 +0000219 if (big_image) {
220 if (kernel_size > BZIMAGE_MAX_SIZE) {
221 printf("Error: bzImage kernel too big! "
222 "(size: %ld, max: %d)\n",
223 kernel_size, BZIMAGE_MAX_SIZE);
224 return 0;
225 }
226 } else if ((kernel_size) > ZIMAGE_MAX_SIZE) {
227 printf("Error: zImage kernel too big! (size: %ld, max: %d)\n",
228 kernel_size, ZIMAGE_MAX_SIZE);
229 return 0;
230 }
231
Simon Glassd98a5bd2014-10-10 08:21:56 -0600232 printf("Loading %s at address %lx (%ld bytes)\n",
233 big_image ? "bzImage" : "zImage", *load_addressp, kernel_size);
Gabe Black540c2622011-12-05 12:09:26 +0000234
Simon Glassd98a5bd2014-10-10 08:21:56 -0600235 memmove((void *)*load_addressp, image + setup_size, kernel_size);
Gabe Black540c2622011-12-05 12:09:26 +0000236
237 return setup_base;
238}
239
240int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
241 unsigned long initrd_addr, unsigned long initrd_size)
242{
243 struct setup_header *hdr = &setup_base->hdr;
244 int bootproto = get_boot_protocol(hdr);
245
Gabe Black540c2622011-12-05 12:09:26 +0000246 setup_base->e820_entries = install_e820_map(
247 ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
Graeme Russ1bab1042010-04-24 00:05:49 +1000248
Gabe Black540c2622011-12-05 12:09:26 +0000249 if (bootproto == 0x0100) {
250 setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
251 setup_base->screen_info.cl_offset = COMMAND_LINE_OFFSET;
252 }
wdenk591dda52002-11-18 00:14:45 +0000253 if (bootproto >= 0x0200) {
Graeme Russ1bab1042010-04-24 00:05:49 +1000254 hdr->type_of_loader = 8;
255
wdenk591dda52002-11-18 00:14:45 +0000256 if (initrd_addr) {
Gabe Black1cf51212011-12-05 12:09:23 +0000257 printf("Initial RAM disk at linear address "
258 "0x%08lx, size %ld bytes\n",
wdenk591dda52002-11-18 00:14:45 +0000259 initrd_addr, initrd_size);
wdenk57b2d802003-06-27 21:31:46 +0000260
Graeme Russ1bab1042010-04-24 00:05:49 +1000261 hdr->ramdisk_image = initrd_addr;
262 hdr->ramdisk_size = initrd_size;
wdenk591dda52002-11-18 00:14:45 +0000263 }
264 }
wdenk57b2d802003-06-27 21:31:46 +0000265
wdenk591dda52002-11-18 00:14:45 +0000266 if (bootproto >= 0x0201) {
Graeme Russ1bab1042010-04-24 00:05:49 +1000267 hdr->heap_end_ptr = HEAP_END_OFFSET;
268 hdr->loadflags |= HEAP_FLAG;
wdenk591dda52002-11-18 00:14:45 +0000269 }
wdenk57b2d802003-06-27 21:31:46 +0000270
Simon Glass4b4f2732014-10-19 21:11:21 -0600271 if (cmd_line) {
272 if (bootproto >= 0x0202) {
273 hdr->cmd_line_ptr = (uintptr_t)cmd_line;
274 } else if (bootproto >= 0x0200) {
275 setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
276 setup_base->screen_info.cl_offset =
277 (uintptr_t)cmd_line - (uintptr_t)setup_base;
Graeme Russ1bab1042010-04-24 00:05:49 +1000278
Simon Glass4b4f2732014-10-19 21:11:21 -0600279 hdr->setup_move_size = 0x9100;
280 }
281
282 /* build command line at COMMAND_LINE_OFFSET */
283 build_command_line(cmd_line, auto_boot);
wdenk591dda52002-11-18 00:14:45 +0000284 }
wdenk591dda52002-11-18 00:14:45 +0000285
Andy Shevchenko8b7adf82018-01-10 19:40:14 +0200286#ifdef CONFIG_INTEL_MID
287 if (bootproto >= 0x0207)
288 hdr->hardware_subarch = X86_SUBARCH_INTEL_MID;
289#endif
290
Andy Shevchenkod87a21d2019-09-13 18:42:00 +0300291#ifdef CONFIG_GENERATE_ACPI_TABLE
292 setup_base->acpi_rsdp_addr = acpi_get_rsdp_addr();
293#endif
294
Ivan Gorinov901bb0b2018-03-26 18:06:54 -0700295 setup_device_tree(hdr, (const void *)env_get_hex("fdtaddr", 0));
Bin Mengf6d504f2015-07-06 16:31:36 +0800296 setup_video(&setup_base->screen_info);
297
Bin Meng106dcfc2018-08-23 08:24:10 -0700298#ifdef CONFIG_EFI_STUB
299 setup_efi_info(&setup_base->efi_info);
300#endif
301
Gabe Black540c2622011-12-05 12:09:26 +0000302 return 0;
wdenk591dda52002-11-18 00:14:45 +0000303}
304
Graeme Russ81d90dd2011-12-23 10:20:55 +1100305void setup_pcat_compatibility(void)
306 __attribute__((weak, alias("__setup_pcat_compatibility")));
307
308void __setup_pcat_compatibility(void)
309{
310}
311
Graeme Russ883c6032011-11-08 02:33:15 +0000312int do_zboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
Graeme Russ1bab1042010-04-24 00:05:49 +1000313{
Gabe Black540c2622011-12-05 12:09:26 +0000314 struct boot_params *base_ptr;
Graeme Russ3134be22010-10-07 20:03:19 +1100315 void *bzImage_addr = NULL;
Simon Glassd98a5bd2014-10-10 08:21:56 -0600316 ulong load_address;
Graeme Russ3134be22010-10-07 20:03:19 +1100317 char *s;
Graeme Russ1bab1042010-04-24 00:05:49 +1000318 ulong bzImage_size = 0;
Gabe Black69b49ee2011-12-05 12:09:27 +0000319 ulong initrd_addr = 0;
320 ulong initrd_size = 0;
Graeme Russ1bab1042010-04-24 00:05:49 +1000321
322 disable_interrupts();
323
324 /* Setup board for maximum PC/AT Compatibility */
325 setup_pcat_compatibility();
326
Gabe Black1cf51212011-12-05 12:09:23 +0000327 if (argc >= 2) {
Graeme Russ3134be22010-10-07 20:03:19 +1100328 /* argv[1] holds the address of the bzImage */
329 s = argv[1];
Gabe Black1cf51212011-12-05 12:09:23 +0000330 } else {
Simon Glass64b723f2017-08-03 12:22:12 -0600331 s = env_get("fileaddr");
Gabe Black1cf51212011-12-05 12:09:23 +0000332 }
Graeme Russ1bab1042010-04-24 00:05:49 +1000333
Graeme Russ3134be22010-10-07 20:03:19 +1100334 if (s)
335 bzImage_addr = (void *)simple_strtoul(s, NULL, 16);
336
Gabe Black69b49ee2011-12-05 12:09:27 +0000337 if (argc >= 3) {
Graeme Russ3134be22010-10-07 20:03:19 +1100338 /* argv[2] holds the size of the bzImage */
Graeme Russ1bab1042010-04-24 00:05:49 +1000339 bzImage_size = simple_strtoul(argv[2], NULL, 16);
Gabe Black69b49ee2011-12-05 12:09:27 +0000340 }
341
342 if (argc >= 4)
343 initrd_addr = simple_strtoul(argv[3], NULL, 16);
344 if (argc >= 5)
345 initrd_size = simple_strtoul(argv[4], NULL, 16);
Graeme Russ1bab1042010-04-24 00:05:49 +1000346
Gabe Black1cf51212011-12-05 12:09:23 +0000347 /* Lets look for */
Gabe Black540c2622011-12-05 12:09:26 +0000348 base_ptr = load_zimage(bzImage_addr, bzImage_size, &load_address);
Graeme Russ1bab1042010-04-24 00:05:49 +1000349
Graeme Russ883c6032011-11-08 02:33:15 +0000350 if (!base_ptr) {
Simon Glassddf446b2014-10-10 08:21:59 -0600351 puts("## Kernel loading failed ...\n");
Gabe Black540c2622011-12-05 12:09:26 +0000352 return -1;
Graeme Russ1bab1042010-04-24 00:05:49 +1000353 }
Gabe Black540c2622011-12-05 12:09:26 +0000354 if (setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET,
Gabe Black69b49ee2011-12-05 12:09:27 +0000355 0, initrd_addr, initrd_size)) {
Simon Glassddf446b2014-10-10 08:21:59 -0600356 puts("Setting up boot parameters failed ...\n");
Gabe Black540c2622011-12-05 12:09:26 +0000357 return -1;
358 }
359
Gabe Black540c2622011-12-05 12:09:26 +0000360 /* we assume that the kernel is in place */
Simon Glassd98a5bd2014-10-10 08:21:56 -0600361 return boot_linux_kernel((ulong)base_ptr, load_address, false);
Graeme Russ1bab1042010-04-24 00:05:49 +1000362}
363
364U_BOOT_CMD(
Gabe Black69b49ee2011-12-05 12:09:27 +0000365 zboot, 5, 0, do_zboot,
Graeme Russ1bab1042010-04-24 00:05:49 +1000366 "Boot bzImage",
Gabe Black69b49ee2011-12-05 12:09:27 +0000367 "[addr] [size] [initrd addr] [initrd size]\n"
368 " addr - The optional starting address of the bzimage.\n"
369 " If not set it defaults to the environment\n"
370 " variable \"fileaddr\".\n"
371 " size - The optional size of the bzimage. Defaults to\n"
372 " zero.\n"
373 " initrd addr - The address of the initrd image to use, if any.\n"
374 " initrd size - The size of the initrd image to use, if any.\n"
Graeme Russ1bab1042010-04-24 00:05:49 +1000375);