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+
19 #include <u-boot/zlib.h>
20 #include <asm/byteorder.h>
22 #include <fdt_support.h>
23 #include <asm/bootm.h>
24 #include <asm/secure.h>
25 #include <linux/compiler.h>
27 #if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
28 #include <asm/armv7.h>
31 DECLARE_GLOBAL_DATA_PTR;
33 static struct tag *params;
35 static ulong get_sp(void)
39 asm("mov %0, sp" : "=r"(ret) : );
43 void arch_lmb_reserve(struct lmb *lmb)
48 * Booting a (Linux) kernel image
50 * Allocate space for command line and board info - the
51 * address should be as high as possible within the reach of
52 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
53 * memory, which means far enough below the current stack
57 debug("## Current stack ends at 0x%08lx ", sp);
59 /* adjust sp by 4K to be safe */
62 gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
66 * announce_and_cleanup() - Print message and prepare for kernel boot
68 * @fake: non-zero to do everything except actually boot
70 static void announce_and_cleanup(int fake)
72 printf("\nStarting kernel ...%s\n\n", fake ?
73 "(fake run for tracing)" : "");
74 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
75 #ifdef CONFIG_BOOTSTAGE_FDT
76 bootstage_fdt_add_report();
78 #ifdef CONFIG_BOOTSTAGE_REPORT
82 #ifdef CONFIG_USB_DEVICE
85 cleanup_before_linux();
88 static void setup_start_tag (bd_t *bd)
90 params = (struct tag *)bd->bi_boot_params;
92 params->hdr.tag = ATAG_CORE;
93 params->hdr.size = tag_size (tag_core);
95 params->u.core.flags = 0;
96 params->u.core.pagesize = 0;
97 params->u.core.rootdev = 0;
99 params = tag_next (params);
102 static void setup_memory_tags(bd_t *bd)
106 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
107 params->hdr.tag = ATAG_MEM;
108 params->hdr.size = tag_size (tag_mem32);
110 params->u.mem.start = bd->bi_dram[i].start;
111 params->u.mem.size = bd->bi_dram[i].size;
113 params = tag_next (params);
117 static void setup_commandline_tag(bd_t *bd, char *commandline)
124 /* eat leading white space */
125 for (p = commandline; *p == ' '; p++);
127 /* skip non-existent command lines so the kernel will still
128 * use its default command line.
133 params->hdr.tag = ATAG_CMDLINE;
135 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
137 strcpy (params->u.cmdline.cmdline, p);
139 params = tag_next (params);
142 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
144 /* an ATAG_INITRD node tells the kernel where the compressed
145 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
147 params->hdr.tag = ATAG_INITRD2;
148 params->hdr.size = tag_size (tag_initrd);
150 params->u.initrd.start = initrd_start;
151 params->u.initrd.size = initrd_end - initrd_start;
153 params = tag_next (params);
156 static void setup_serial_tag(struct tag **tmp)
158 struct tag *params = *tmp;
159 struct tag_serialnr serialnr;
161 get_board_serial(&serialnr);
162 params->hdr.tag = ATAG_SERIAL;
163 params->hdr.size = tag_size (tag_serialnr);
164 params->u.serialnr.low = serialnr.low;
165 params->u.serialnr.high= serialnr.high;
166 params = tag_next (params);
170 static void setup_revision_tag(struct tag **in_params)
174 rev = get_board_rev();
175 params->hdr.tag = ATAG_REVISION;
176 params->hdr.size = tag_size (tag_revision);
177 params->u.revision.rev = rev;
178 params = tag_next (params);
181 static void setup_end_tag(bd_t *bd)
183 params->hdr.tag = ATAG_NONE;
184 params->hdr.size = 0;
187 __weak void setup_board_tags(struct tag **in_params) {}
190 static void do_nonsec_virt_switch(void)
193 flush_dcache_all(); /* flush cache before swtiching to EL2 */
194 armv8_switch_to_el2();
195 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1
196 armv8_switch_to_el1();
201 /* Subcommand: PREP */
202 static void boot_prep_linux(bootm_headers_t *images)
204 char *commandline = getenv("bootargs");
206 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
207 #ifdef CONFIG_OF_LIBFDT
208 debug("using: FDT\n");
209 if (image_setup_linux(images)) {
210 printf("FDT creation failed! hanging...");
214 } else if (BOOTM_ENABLE_TAGS) {
215 debug("using: ATAGS\n");
216 setup_start_tag(gd->bd);
217 if (BOOTM_ENABLE_SERIAL_TAG)
218 setup_serial_tag(¶ms);
219 if (BOOTM_ENABLE_CMDLINE_TAG)
220 setup_commandline_tag(gd->bd, commandline);
221 if (BOOTM_ENABLE_REVISION_TAG)
222 setup_revision_tag(¶ms);
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,
231 setup_board_tags(¶ms);
232 setup_end_tag(gd->bd);
234 printf("FDT and ATAGS support not compiled in - hanging\n");
240 static void boot_jump_linux(bootm_headers_t *images, int flag)
243 void (*kernel_entry)(void *fdt_addr, void *res0, void *res1,
245 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
247 kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1,
248 void *res2))images->ep;
250 debug("## Transferring control to Linux (at address %lx)...\n",
251 (ulong) kernel_entry);
252 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
254 announce_and_cleanup(fake);
257 do_nonsec_virt_switch();
258 kernel_entry(images->ft_addr, NULL, NULL, NULL);
261 unsigned long machid = gd->bd->bi_arch_number;
263 void (*kernel_entry)(int zero, int arch, uint params);
265 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
267 kernel_entry = (void (*)(int, int, uint))images->ep;
269 s = getenv("machid");
271 strict_strtoul(s, 16, &machid);
272 printf("Using machid 0x%lx from environment\n", machid);
275 debug("## Transferring control to Linux (at address %08lx)" \
276 "...\n", (ulong) kernel_entry);
277 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
278 announce_and_cleanup(fake);
280 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
281 r2 = (unsigned long)images->ft_addr;
283 r2 = gd->bd->bi_boot_params;
286 #if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
288 secure_ram_addr(_do_nonsec_entry)(kernel_entry,
291 kernel_entry(0, machid, r2);
297 /* Main Entry point for arm bootm implementation
299 * Modeled after the powerpc implementation
300 * DIFFERENCE: Instead of calling prep and go at the end
301 * they are called if subcommand is equal 0.
303 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
305 /* No need for those on ARM */
306 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
309 if (flag & BOOTM_STATE_OS_PREP) {
310 boot_prep_linux(images);
314 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
315 boot_jump_linux(images, flag);
319 boot_prep_linux(images);
320 boot_jump_linux(images, flag);
324 #ifdef CONFIG_CMD_BOOTZ
326 struct zimage_header {
333 #define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818
335 int bootz_setup(ulong image, ulong *start, ulong *end)
337 struct zimage_header *zi;
339 zi = (struct zimage_header *)map_sysmem(image, 0);
340 if (zi->zi_magic != LINUX_ARM_ZIMAGE_MAGIC) {
341 puts("Bad Linux ARM zImage magic!\n");
345 *start = zi->zi_start;
348 printf("Kernel image @ %#08lx [ %#08lx - %#08lx ]\n", image, *start,
354 #endif /* CONFIG_CMD_BOOTZ */
356 #if defined(CONFIG_BOOTM_VXWORKS)
357 void boot_prep_vxworks(bootm_headers_t *images)
359 #if defined(CONFIG_OF_LIBFDT)
362 if (images->ft_addr) {
363 off = fdt_path_offset(images->ft_addr, "/memory");
365 if (arch_fixup_fdt(images->ft_addr))
366 puts("## WARNING: fixup memory failed!\n");
370 cleanup_before_linux();
372 void boot_jump_vxworks(bootm_headers_t *images)
374 /* ARM VxWorks requires device tree physical address to be passed */
375 ((void (*)(void *))images->ep)(images->ft_addr);