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>
22 #include <fdt_support.h>
23 #include <asm/bootm.h>
24 #include <asm/secure.h>
25 #include <linux/compiler.h>
29 #ifdef CONFIG_ARMV7_NONSEC
30 #include <asm/armv7.h>
33 DECLARE_GLOBAL_DATA_PTR;
35 static struct tag *params;
37 static ulong get_sp(void)
41 asm("mov %0, sp" : "=r"(ret) : );
45 void arch_lmb_reserve(struct lmb *lmb)
50 * Booting a (Linux) kernel image
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
59 debug("## Current stack ends at 0x%08lx ", sp);
61 /* adjust sp by 4K to be safe */
64 gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
67 __weak void board_quiesce_devices(void)
72 * announce_and_cleanup() - Print message and prepare for kernel boot
74 * @fake: non-zero to do everything except actually boot
76 static void announce_and_cleanup(int fake)
78 printf("\nStarting kernel ...%s\n\n", fake ?
79 "(fake run for tracing)" : "");
80 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
81 #ifdef CONFIG_BOOTSTAGE_FDT
82 bootstage_fdt_add_report();
84 #ifdef CONFIG_BOOTSTAGE_REPORT
88 #ifdef CONFIG_USB_DEVICE
92 board_quiesce_devices();
94 cleanup_before_linux();
97 static void setup_start_tag (bd_t *bd)
99 params = (struct tag *)bd->bi_boot_params;
101 params->hdr.tag = ATAG_CORE;
102 params->hdr.size = tag_size (tag_core);
104 params->u.core.flags = 0;
105 params->u.core.pagesize = 0;
106 params->u.core.rootdev = 0;
108 params = tag_next (params);
111 static void setup_memory_tags(bd_t *bd)
115 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
116 params->hdr.tag = ATAG_MEM;
117 params->hdr.size = tag_size (tag_mem32);
119 params->u.mem.start = bd->bi_dram[i].start;
120 params->u.mem.size = bd->bi_dram[i].size;
122 params = tag_next (params);
126 static void setup_commandline_tag(bd_t *bd, char *commandline)
133 /* eat leading white space */
134 for (p = commandline; *p == ' '; p++);
136 /* skip non-existent command lines so the kernel will still
137 * use its default command line.
142 params->hdr.tag = ATAG_CMDLINE;
144 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
146 strcpy (params->u.cmdline.cmdline, p);
148 params = tag_next (params);
151 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
153 /* an ATAG_INITRD node tells the kernel where the compressed
154 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
156 params->hdr.tag = ATAG_INITRD2;
157 params->hdr.size = tag_size (tag_initrd);
159 params->u.initrd.start = initrd_start;
160 params->u.initrd.size = initrd_end - initrd_start;
162 params = tag_next (params);
165 static void setup_serial_tag(struct tag **tmp)
167 struct tag *params = *tmp;
168 struct tag_serialnr serialnr;
170 get_board_serial(&serialnr);
171 params->hdr.tag = ATAG_SERIAL;
172 params->hdr.size = tag_size (tag_serialnr);
173 params->u.serialnr.low = serialnr.low;
174 params->u.serialnr.high= serialnr.high;
175 params = tag_next (params);
179 static void setup_revision_tag(struct tag **in_params)
183 rev = get_board_rev();
184 params->hdr.tag = ATAG_REVISION;
185 params->hdr.size = tag_size (tag_revision);
186 params->u.revision.rev = rev;
187 params = tag_next (params);
190 static void setup_end_tag(bd_t *bd)
192 params->hdr.tag = ATAG_NONE;
193 params->hdr.size = 0;
196 __weak void setup_board_tags(struct tag **in_params) {}
199 static void do_nonsec_virt_switch(void)
202 dcache_disable(); /* flush cache before swtiching to EL2 */
203 armv8_switch_to_el2();
204 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1
205 armv8_switch_to_el1();
210 /* Subcommand: PREP */
211 static void boot_prep_linux(bootm_headers_t *images)
213 char *commandline = getenv("bootargs");
215 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
216 #ifdef CONFIG_OF_LIBFDT
217 debug("using: FDT\n");
218 if (image_setup_linux(images)) {
219 printf("FDT creation failed! hanging...");
223 } else if (BOOTM_ENABLE_TAGS) {
224 debug("using: ATAGS\n");
225 setup_start_tag(gd->bd);
226 if (BOOTM_ENABLE_SERIAL_TAG)
227 setup_serial_tag(¶ms);
228 if (BOOTM_ENABLE_CMDLINE_TAG)
229 setup_commandline_tag(gd->bd, commandline);
230 if (BOOTM_ENABLE_REVISION_TAG)
231 setup_revision_tag(¶ms);
232 if (BOOTM_ENABLE_MEMORY_TAGS)
233 setup_memory_tags(gd->bd);
234 if (BOOTM_ENABLE_INITRD_TAG) {
236 * In boot_ramdisk_high(), it may relocate ramdisk to
237 * a specified location. And set images->initrd_start &
238 * images->initrd_end to relocated ramdisk's start/end
239 * addresses. So use them instead of images->rd_start &
240 * images->rd_end when possible.
242 if (images->initrd_start && images->initrd_end) {
243 setup_initrd_tag(gd->bd, images->initrd_start,
245 } else if (images->rd_start && images->rd_end) {
246 setup_initrd_tag(gd->bd, images->rd_start,
250 setup_board_tags(¶ms);
251 setup_end_tag(gd->bd);
253 printf("FDT and ATAGS support not compiled in - hanging\n");
258 __weak bool armv7_boot_nonsec_default(void)
260 #ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT
267 #ifdef CONFIG_ARMV7_NONSEC
268 bool armv7_boot_nonsec(void)
270 char *s = getenv("bootm_boot_mode");
271 bool nonsec = armv7_boot_nonsec_default();
273 if (s && !strcmp(s, "sec"))
276 if (s && !strcmp(s, "nonsec"))
284 static void boot_jump_linux(bootm_headers_t *images, int flag)
287 void (*kernel_entry)(void *fdt_addr, void *res0, void *res1,
289 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
291 kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1,
292 void *res2))images->ep;
294 debug("## Transferring control to Linux (at address %lx)...\n",
295 (ulong) kernel_entry);
296 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
298 announce_and_cleanup(fake);
301 do_nonsec_virt_switch();
302 kernel_entry(images->ft_addr, NULL, NULL, NULL);
305 unsigned long machid = gd->bd->bi_arch_number;
307 void (*kernel_entry)(int zero, int arch, uint params);
309 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
311 kernel_entry = (void (*)(int, int, uint))images->ep;
313 s = getenv("machid");
315 if (strict_strtoul(s, 16, &machid) < 0) {
316 debug("strict_strtoul failed!\n");
319 printf("Using machid 0x%lx from environment\n", machid);
322 debug("## Transferring control to Linux (at address %08lx)" \
323 "...\n", (ulong) kernel_entry);
324 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
325 announce_and_cleanup(fake);
327 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
328 r2 = (unsigned long)images->ft_addr;
330 r2 = gd->bd->bi_boot_params;
333 #ifdef CONFIG_ARMV7_NONSEC
334 if (armv7_boot_nonsec()) {
336 secure_ram_addr(_do_nonsec_entry)(kernel_entry,
340 kernel_entry(0, machid, r2);
345 /* Main Entry point for arm bootm implementation
347 * Modeled after the powerpc implementation
348 * DIFFERENCE: Instead of calling prep and go at the end
349 * they are called if subcommand is equal 0.
351 int do_bootm_linux(int flag, int argc, char * const argv[],
352 bootm_headers_t *images)
354 /* No need for those on ARM */
355 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
358 if (flag & BOOTM_STATE_OS_PREP) {
359 boot_prep_linux(images);
363 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
364 boot_jump_linux(images, flag);
368 boot_prep_linux(images);
369 boot_jump_linux(images, flag);
373 #if defined(CONFIG_BOOTM_VXWORKS)
374 void boot_prep_vxworks(bootm_headers_t *images)
376 #if defined(CONFIG_OF_LIBFDT)
379 if (images->ft_addr) {
380 off = fdt_path_offset(images->ft_addr, "/memory");
382 #ifdef CONFIG_ARCH_FIXUP_FDT
383 if (arch_fixup_fdt(images->ft_addr))
384 puts("## WARNING: fixup memory failed!\n");
389 cleanup_before_linux();
391 void boot_jump_vxworks(bootm_headers_t *images)
393 /* ARM VxWorks requires device tree physical address to be passed */
394 ((void (*)(void *))images->ep)(images->ft_addr);