1 // SPDX-License-Identifier: GPL-2.0+
3 * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
4 * - Added prep subcommand support
5 * - Reorganized source - modeled after powerpc version
8 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
9 * Marius Groeger <mgroeger@sysgo.de>
11 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
19 #include <u-boot/zlib.h>
20 #include <asm/byteorder.h>
21 #include <linux/libfdt.h>
23 #include <fdt_support.h>
24 #include <asm/bootm.h>
25 #include <asm/secure.h>
26 #include <linux/compiler.h>
30 #ifdef CONFIG_ARMV7_NONSEC
31 #include <asm/armv7.h>
33 #include <asm/setup.h>
35 DECLARE_GLOBAL_DATA_PTR;
37 static struct tag *params;
39 static ulong get_sp(void)
43 asm("mov %0, sp" : "=r"(ret) : );
47 void arch_lmb_reserve(struct lmb *lmb)
53 * Booting a (Linux) kernel image
55 * Allocate space for command line and board info - the
56 * address should be as high as possible within the reach of
57 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
58 * memory, which means far enough below the current stack
62 debug("## Current stack ends at 0x%08lx ", sp);
64 /* adjust sp by 4K to be safe */
66 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
67 if (sp < gd->bd->bi_dram[bank].start)
69 bank_end = gd->bd->bi_dram[bank].start +
70 gd->bd->bi_dram[bank].size;
73 lmb_reserve(lmb, sp, bank_end - sp);
78 __weak void board_quiesce_devices(void)
83 * announce_and_cleanup() - Print message and prepare for kernel boot
85 * @fake: non-zero to do everything except actually boot
87 static void announce_and_cleanup(int fake)
89 printf("\nStarting kernel ...%s\n\n", fake ?
90 "(fake run for tracing)" : "");
91 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
92 #ifdef CONFIG_BOOTSTAGE_FDT
93 bootstage_fdt_add_report();
95 #ifdef CONFIG_BOOTSTAGE_REPORT
99 #ifdef CONFIG_USB_DEVICE
103 board_quiesce_devices();
106 * Call remove function of all devices with a removal flag set.
107 * This may be useful for last-stage operations, like cancelling
108 * of DMA operation or releasing device internal buffers.
110 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
112 cleanup_before_linux();
115 static void setup_start_tag (bd_t *bd)
117 params = (struct tag *)bd->bi_boot_params;
119 params->hdr.tag = ATAG_CORE;
120 params->hdr.size = tag_size (tag_core);
122 params->u.core.flags = 0;
123 params->u.core.pagesize = 0;
124 params->u.core.rootdev = 0;
126 params = tag_next (params);
129 static void setup_memory_tags(bd_t *bd)
133 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
134 params->hdr.tag = ATAG_MEM;
135 params->hdr.size = tag_size (tag_mem32);
137 params->u.mem.start = bd->bi_dram[i].start;
138 params->u.mem.size = bd->bi_dram[i].size;
140 params = tag_next (params);
144 static void setup_commandline_tag(bd_t *bd, char *commandline)
151 /* eat leading white space */
152 for (p = commandline; *p == ' '; p++);
154 /* skip non-existent command lines so the kernel will still
155 * use its default command line.
160 params->hdr.tag = ATAG_CMDLINE;
162 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
164 strcpy (params->u.cmdline.cmdline, p);
166 params = tag_next (params);
169 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
171 /* an ATAG_INITRD node tells the kernel where the compressed
172 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
174 params->hdr.tag = ATAG_INITRD2;
175 params->hdr.size = tag_size (tag_initrd);
177 params->u.initrd.start = initrd_start;
178 params->u.initrd.size = initrd_end - initrd_start;
180 params = tag_next (params);
183 static void setup_serial_tag(struct tag **tmp)
185 struct tag *params = *tmp;
186 struct tag_serialnr serialnr;
188 get_board_serial(&serialnr);
189 params->hdr.tag = ATAG_SERIAL;
190 params->hdr.size = tag_size (tag_serialnr);
191 params->u.serialnr.low = serialnr.low;
192 params->u.serialnr.high= serialnr.high;
193 params = tag_next (params);
197 static void setup_revision_tag(struct tag **in_params)
201 rev = get_board_rev();
202 params->hdr.tag = ATAG_REVISION;
203 params->hdr.size = tag_size (tag_revision);
204 params->u.revision.rev = rev;
205 params = tag_next (params);
208 static void setup_end_tag(bd_t *bd)
210 params->hdr.tag = ATAG_NONE;
211 params->hdr.size = 0;
214 __weak void setup_board_tags(struct tag **in_params) {}
217 static void do_nonsec_virt_switch(void)
220 dcache_disable(); /* flush cache before swtiching to EL2 */
224 /* Subcommand: PREP */
225 static void boot_prep_linux(bootm_headers_t *images)
227 char *commandline = env_get("bootargs");
229 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
230 #ifdef CONFIG_OF_LIBFDT
231 debug("using: FDT\n");
232 if (image_setup_linux(images)) {
233 printf("FDT creation failed! hanging...");
237 } else if (BOOTM_ENABLE_TAGS) {
238 debug("using: ATAGS\n");
239 setup_start_tag(gd->bd);
240 if (BOOTM_ENABLE_SERIAL_TAG)
241 setup_serial_tag(¶ms);
242 if (BOOTM_ENABLE_CMDLINE_TAG)
243 setup_commandline_tag(gd->bd, commandline);
244 if (BOOTM_ENABLE_REVISION_TAG)
245 setup_revision_tag(¶ms);
246 if (BOOTM_ENABLE_MEMORY_TAGS)
247 setup_memory_tags(gd->bd);
248 if (BOOTM_ENABLE_INITRD_TAG) {
250 * In boot_ramdisk_high(), it may relocate ramdisk to
251 * a specified location. And set images->initrd_start &
252 * images->initrd_end to relocated ramdisk's start/end
253 * addresses. So use them instead of images->rd_start &
254 * images->rd_end when possible.
256 if (images->initrd_start && images->initrd_end) {
257 setup_initrd_tag(gd->bd, images->initrd_start,
259 } else if (images->rd_start && images->rd_end) {
260 setup_initrd_tag(gd->bd, images->rd_start,
264 setup_board_tags(¶ms);
265 setup_end_tag(gd->bd);
267 printf("FDT and ATAGS support not compiled in - hanging\n");
272 __weak bool armv7_boot_nonsec_default(void)
274 #ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT
281 #ifdef CONFIG_ARMV7_NONSEC
282 bool armv7_boot_nonsec(void)
284 char *s = env_get("bootm_boot_mode");
285 bool nonsec = armv7_boot_nonsec_default();
287 if (s && !strcmp(s, "sec"))
290 if (s && !strcmp(s, "nonsec"))
298 __weak void update_os_arch_secondary_cores(uint8_t os_arch)
302 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1
303 static void switch_to_el1(void)
305 if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
306 (images.os.arch == IH_ARCH_ARM))
307 armv8_switch_to_el1(0, (u64)gd->bd->bi_arch_number,
308 (u64)images.ft_addr, 0,
312 armv8_switch_to_el1((u64)images.ft_addr, 0, 0, 0,
320 static void boot_jump_linux(bootm_headers_t *images, int flag)
323 void (*kernel_entry)(void *fdt_addr, void *res0, void *res1,
325 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
327 kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1,
328 void *res2))images->ep;
330 debug("## Transferring control to Linux (at address %lx)...\n",
331 (ulong) kernel_entry);
332 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
334 announce_and_cleanup(fake);
337 #ifdef CONFIG_ARMV8_PSCI
340 do_nonsec_virt_switch();
342 update_os_arch_secondary_cores(images->os.arch);
344 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1
345 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
346 (u64)switch_to_el1, ES_TO_AARCH64);
348 if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
349 (images->os.arch == IH_ARCH_ARM))
350 armv8_switch_to_el2(0, (u64)gd->bd->bi_arch_number,
351 (u64)images->ft_addr, 0,
355 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
361 unsigned long machid = gd->bd->bi_arch_number;
363 void (*kernel_entry)(int zero, int arch, uint params);
365 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
367 kernel_entry = (void (*)(int, int, uint))images->ep;
368 #ifdef CONFIG_CPU_V7M
369 ulong addr = (ulong)kernel_entry | 1;
370 kernel_entry = (void *)addr;
372 s = env_get("machid");
374 if (strict_strtoul(s, 16, &machid) < 0) {
375 debug("strict_strtoul failed!\n");
378 printf("Using machid 0x%lx from environment\n", machid);
381 debug("## Transferring control to Linux (at address %08lx)" \
382 "...\n", (ulong) kernel_entry);
383 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
384 announce_and_cleanup(fake);
386 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
387 r2 = (unsigned long)images->ft_addr;
389 r2 = gd->bd->bi_boot_params;
392 #ifdef CONFIG_ARMV7_NONSEC
393 if (armv7_boot_nonsec()) {
395 secure_ram_addr(_do_nonsec_entry)(kernel_entry,
399 kernel_entry(0, machid, r2);
404 /* Main Entry point for arm bootm implementation
406 * Modeled after the powerpc implementation
407 * DIFFERENCE: Instead of calling prep and go at the end
408 * they are called if subcommand is equal 0.
410 int do_bootm_linux(int flag, int argc, char * const argv[],
411 bootm_headers_t *images)
413 /* No need for those on ARM */
414 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
417 if (flag & BOOTM_STATE_OS_PREP) {
418 boot_prep_linux(images);
422 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
423 boot_jump_linux(images, flag);
427 boot_prep_linux(images);
428 boot_jump_linux(images, flag);
432 #if defined(CONFIG_BOOTM_VXWORKS)
433 void boot_prep_vxworks(bootm_headers_t *images)
435 #if defined(CONFIG_OF_LIBFDT)
438 if (images->ft_addr) {
439 off = fdt_path_offset(images->ft_addr, "/memory");
441 if (arch_fixup_fdt(images->ft_addr))
442 puts("## WARNING: fixup memory failed!\n");
446 cleanup_before_linux();
448 void boot_jump_vxworks(bootm_headers_t *images)
450 #if defined(CONFIG_ARM64) && defined(CONFIG_ARMV8_PSCI)
455 /* ARM VxWorks requires device tree physical address to be passed */
456 ((void (*)(void *))images->ep)(images->ft_addr);