2 * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
3 * - Added prep subcommand support
4 * - Reorganized source - modeled after powerpc version
7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8 * Marius Groeger <mgroeger@sysgo.de>
10 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
12 * SPDX-License-Identifier: GPL-2.0+
18 #include <u-boot/zlib.h>
19 #include <asm/byteorder.h>
21 #include <fdt_support.h>
22 #include <asm/bootm.h>
23 #include <linux/compiler.h>
25 #if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
26 #include <asm/armv7.h>
29 DECLARE_GLOBAL_DATA_PTR;
31 static struct tag *params;
33 static ulong get_sp(void)
37 asm("mov %0, sp" : "=r"(ret) : );
41 void arch_lmb_reserve(struct lmb *lmb)
46 * Booting a (Linux) kernel image
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
55 debug("## Current stack ends at 0x%08lx ", sp);
57 /* adjust sp by 4K to be safe */
60 gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
64 * announce_and_cleanup() - Print message and prepare for kernel boot
66 * @fake: non-zero to do everything except actually boot
68 static void announce_and_cleanup(int fake)
70 printf("\nStarting kernel ...%s\n\n", fake ?
71 "(fake run for tracing)" : "");
72 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
73 #ifdef CONFIG_BOOTSTAGE_FDT
74 if (flag == BOOTM_STATE_OS_FAKE_GO)
75 bootstage_fdt_add_report();
77 #ifdef CONFIG_BOOTSTAGE_REPORT
81 #ifdef CONFIG_USB_DEVICE
84 cleanup_before_linux();
87 static void setup_start_tag (bd_t *bd)
89 params = (struct tag *)bd->bi_boot_params;
91 params->hdr.tag = ATAG_CORE;
92 params->hdr.size = tag_size (tag_core);
94 params->u.core.flags = 0;
95 params->u.core.pagesize = 0;
96 params->u.core.rootdev = 0;
98 params = tag_next (params);
101 static void setup_memory_tags(bd_t *bd)
105 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
106 params->hdr.tag = ATAG_MEM;
107 params->hdr.size = tag_size (tag_mem32);
109 params->u.mem.start = bd->bi_dram[i].start;
110 params->u.mem.size = bd->bi_dram[i].size;
112 params = tag_next (params);
116 static void setup_commandline_tag(bd_t *bd, char *commandline)
123 /* eat leading white space */
124 for (p = commandline; *p == ' '; p++);
126 /* skip non-existent command lines so the kernel will still
127 * use its default command line.
132 params->hdr.tag = ATAG_CMDLINE;
134 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
136 strcpy (params->u.cmdline.cmdline, p);
138 params = tag_next (params);
141 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
143 /* an ATAG_INITRD node tells the kernel where the compressed
144 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
146 params->hdr.tag = ATAG_INITRD2;
147 params->hdr.size = tag_size (tag_initrd);
149 params->u.initrd.start = initrd_start;
150 params->u.initrd.size = initrd_end - initrd_start;
152 params = tag_next (params);
155 static void setup_serial_tag(struct tag **tmp)
157 struct tag *params = *tmp;
158 struct tag_serialnr serialnr;
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);
169 static void setup_revision_tag(struct tag **in_params)
173 rev = get_board_rev();
174 params->hdr.tag = ATAG_REVISION;
175 params->hdr.size = tag_size (tag_revision);
176 params->u.revision.rev = rev;
177 params = tag_next (params);
180 static void setup_end_tag(bd_t *bd)
182 params->hdr.tag = ATAG_NONE;
183 params->hdr.size = 0;
186 __weak void setup_board_tags(struct tag **in_params) {}
188 static void do_nonsec_virt_switch(void)
190 #if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
191 if (armv7_switch_nonsec() == 0)
192 #ifdef CONFIG_ARMV7_VIRT
193 if (armv7_switch_hyp() == 0)
194 debug("entered HYP mode\n");
196 debug("entered non-secure state\n");
202 armv8_switch_to_el2();
203 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1
204 armv8_switch_to_el1();
209 /* Subcommand: PREP */
210 static void boot_prep_linux(bootm_headers_t *images)
212 char *commandline = getenv("bootargs");
214 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
215 #ifdef CONFIG_OF_LIBFDT
216 debug("using: FDT\n");
217 if (image_setup_linux(images)) {
218 printf("FDT creation failed! hanging...");
222 } else if (BOOTM_ENABLE_TAGS) {
223 debug("using: ATAGS\n");
224 setup_start_tag(gd->bd);
225 if (BOOTM_ENABLE_SERIAL_TAG)
226 setup_serial_tag(¶ms);
227 if (BOOTM_ENABLE_CMDLINE_TAG)
228 setup_commandline_tag(gd->bd, commandline);
229 if (BOOTM_ENABLE_REVISION_TAG)
230 setup_revision_tag(¶ms);
231 if (BOOTM_ENABLE_MEMORY_TAGS)
232 setup_memory_tags(gd->bd);
233 if (BOOTM_ENABLE_INITRD_TAG) {
234 if (images->rd_start && images->rd_end) {
235 setup_initrd_tag(gd->bd, images->rd_start,
239 setup_board_tags(¶ms);
240 setup_end_tag(gd->bd);
242 printf("FDT and ATAGS support not compiled in - hanging\n");
245 do_nonsec_virt_switch();
249 static void boot_jump_linux(bootm_headers_t *images, int flag)
252 void (*kernel_entry)(void *fdt_addr);
253 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
255 kernel_entry = (void (*)(void *fdt_addr))images->ep;
257 debug("## Transferring control to Linux (at address %lx)...\n",
258 (ulong) kernel_entry);
259 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
261 announce_and_cleanup(fake);
264 kernel_entry(images->ft_addr);
266 unsigned long machid = gd->bd->bi_arch_number;
268 void (*kernel_entry)(int zero, int arch, uint params);
270 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
272 kernel_entry = (void (*)(int, int, uint))images->ep;
274 s = getenv("machid");
276 strict_strtoul(s, 16, &machid);
277 printf("Using machid 0x%lx from environment\n", machid);
280 debug("## Transferring control to Linux (at address %08lx)" \
281 "...\n", (ulong) kernel_entry);
282 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
283 announce_and_cleanup(fake);
285 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
286 r2 = (unsigned long)images->ft_addr;
288 r2 = gd->bd->bi_boot_params;
291 kernel_entry(0, machid, r2);
295 /* Main Entry point for arm bootm implementation
297 * Modeled after the powerpc implementation
298 * DIFFERENCE: Instead of calling prep and go at the end
299 * they are called if subcommand is equal 0.
301 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
303 /* No need for those on ARM */
304 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
307 if (flag & BOOTM_STATE_OS_PREP) {
308 boot_prep_linux(images);
312 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
313 boot_jump_linux(images, flag);
317 boot_prep_linux(images);
318 boot_jump_linux(images, flag);
322 #ifdef CONFIG_CMD_BOOTZ
324 struct zimage_header {
331 #define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818
333 int bootz_setup(ulong image, ulong *start, ulong *end)
335 struct zimage_header *zi;
337 zi = (struct zimage_header *)map_sysmem(image, 0);
338 if (zi->zi_magic != LINUX_ARM_ZIMAGE_MAGIC) {
339 puts("Bad Linux ARM zImage magic!\n");
343 *start = zi->zi_start;
346 printf("Kernel image @ %#08lx [ %#08lx - %#08lx ]\n", image, *start,
352 #endif /* CONFIG_CMD_BOOTZ */
354 #if defined(CONFIG_BOOTM_VXWORKS)
355 void boot_prep_vxworks(bootm_headers_t *images)
357 #if defined(CONFIG_OF_LIBFDT)
360 if (images->ft_addr) {
361 off = fdt_path_offset(images->ft_addr, "/memory");
363 if (arch_fixup_memory_node(images->ft_addr))
364 puts("## WARNING: fixup memory failed!\n");
368 cleanup_before_linux();
370 void boot_jump_vxworks(bootm_headers_t *images)
372 /* ARM VxWorks requires device tree physical address to be passed */
373 ((void (*)(void *))images->ep)(images->ft_addr);