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>
29 #if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
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);
68 * announce_and_cleanup() - Print message and prepare for kernel boot
70 * @fake: non-zero to do everything except actually boot
72 static void announce_and_cleanup(int fake)
74 printf("\nStarting kernel ...%s\n\n", fake ?
75 "(fake run for tracing)" : "");
76 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
77 #ifdef CONFIG_BOOTSTAGE_FDT
78 bootstage_fdt_add_report();
80 #ifdef CONFIG_BOOTSTAGE_REPORT
84 #ifdef CONFIG_USB_DEVICE
87 cleanup_before_linux();
90 static void setup_start_tag (bd_t *bd)
92 params = (struct tag *)bd->bi_boot_params;
94 params->hdr.tag = ATAG_CORE;
95 params->hdr.size = tag_size (tag_core);
97 params->u.core.flags = 0;
98 params->u.core.pagesize = 0;
99 params->u.core.rootdev = 0;
101 params = tag_next (params);
104 static void setup_memory_tags(bd_t *bd)
108 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
109 params->hdr.tag = ATAG_MEM;
110 params->hdr.size = tag_size (tag_mem32);
112 params->u.mem.start = bd->bi_dram[i].start;
113 params->u.mem.size = bd->bi_dram[i].size;
115 params = tag_next (params);
119 static void setup_commandline_tag(bd_t *bd, char *commandline)
126 /* eat leading white space */
127 for (p = commandline; *p == ' '; p++);
129 /* skip non-existent command lines so the kernel will still
130 * use its default command line.
135 params->hdr.tag = ATAG_CMDLINE;
137 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
139 strcpy (params->u.cmdline.cmdline, p);
141 params = tag_next (params);
144 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
146 /* an ATAG_INITRD node tells the kernel where the compressed
147 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
149 params->hdr.tag = ATAG_INITRD2;
150 params->hdr.size = tag_size (tag_initrd);
152 params->u.initrd.start = initrd_start;
153 params->u.initrd.size = initrd_end - initrd_start;
155 params = tag_next (params);
158 static void setup_serial_tag(struct tag **tmp)
160 struct tag *params = *tmp;
161 struct tag_serialnr serialnr;
163 get_board_serial(&serialnr);
164 params->hdr.tag = ATAG_SERIAL;
165 params->hdr.size = tag_size (tag_serialnr);
166 params->u.serialnr.low = serialnr.low;
167 params->u.serialnr.high= serialnr.high;
168 params = tag_next (params);
172 static void setup_revision_tag(struct tag **in_params)
176 rev = get_board_rev();
177 params->hdr.tag = ATAG_REVISION;
178 params->hdr.size = tag_size (tag_revision);
179 params->u.revision.rev = rev;
180 params = tag_next (params);
183 static void setup_end_tag(bd_t *bd)
185 params->hdr.tag = ATAG_NONE;
186 params->hdr.size = 0;
189 __weak void setup_board_tags(struct tag **in_params) {}
192 static void do_nonsec_virt_switch(void)
195 flush_dcache_all(); /* flush cache before swtiching to EL2 */
196 armv8_switch_to_el2();
197 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1
198 armv8_switch_to_el1();
203 /* Subcommand: PREP */
204 static void boot_prep_linux(bootm_headers_t *images)
206 char *commandline = getenv("bootargs");
208 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
209 #ifdef CONFIG_OF_LIBFDT
210 debug("using: FDT\n");
211 if (image_setup_linux(images)) {
212 printf("FDT creation failed! hanging...");
216 } else if (BOOTM_ENABLE_TAGS) {
217 debug("using: ATAGS\n");
218 setup_start_tag(gd->bd);
219 if (BOOTM_ENABLE_SERIAL_TAG)
220 setup_serial_tag(¶ms);
221 if (BOOTM_ENABLE_CMDLINE_TAG)
222 setup_commandline_tag(gd->bd, commandline);
223 if (BOOTM_ENABLE_REVISION_TAG)
224 setup_revision_tag(¶ms);
225 if (BOOTM_ENABLE_MEMORY_TAGS)
226 setup_memory_tags(gd->bd);
227 if (BOOTM_ENABLE_INITRD_TAG) {
228 if (images->rd_start && images->rd_end) {
229 setup_initrd_tag(gd->bd, images->rd_start,
233 setup_board_tags(¶ms);
234 setup_end_tag(gd->bd);
236 printf("FDT and ATAGS support not compiled in - hanging\n");
242 static void boot_jump_linux(bootm_headers_t *images, int flag)
245 void (*kernel_entry)(void *fdt_addr, void *res0, void *res1,
247 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
249 kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1,
250 void *res2))images->ep;
252 debug("## Transferring control to Linux (at address %lx)...\n",
253 (ulong) kernel_entry);
254 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
256 announce_and_cleanup(fake);
259 do_nonsec_virt_switch();
260 kernel_entry(images->ft_addr, NULL, NULL, NULL);
263 unsigned long machid = gd->bd->bi_arch_number;
265 void (*kernel_entry)(int zero, int arch, uint params);
267 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
269 kernel_entry = (void (*)(int, int, uint))images->ep;
271 s = getenv("machid");
273 strict_strtoul(s, 16, &machid);
274 printf("Using machid 0x%lx from environment\n", machid);
277 debug("## Transferring control to Linux (at address %08lx)" \
278 "...\n", (ulong) kernel_entry);
279 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
280 announce_and_cleanup(fake);
282 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
283 r2 = (unsigned long)images->ft_addr;
285 r2 = gd->bd->bi_boot_params;
288 #if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
290 secure_ram_addr(_do_nonsec_entry)(kernel_entry,
293 kernel_entry(0, machid, r2);
299 /* Main Entry point for arm bootm implementation
301 * Modeled after the powerpc implementation
302 * DIFFERENCE: Instead of calling prep and go at the end
303 * they are called if subcommand is equal 0.
305 int do_bootm_linux(int flag, int argc, char * const argv[],
306 bootm_headers_t *images)
308 /* No need for those on ARM */
309 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
312 if (flag & BOOTM_STATE_OS_PREP) {
313 boot_prep_linux(images);
317 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
318 boot_jump_linux(images, flag);
322 boot_prep_linux(images);
323 boot_jump_linux(images, flag);
327 #ifdef CONFIG_CMD_BOOTZ
329 struct zimage_header {
336 #define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818
338 int bootz_setup(ulong image, ulong *start, ulong *end)
340 struct zimage_header *zi;
342 zi = (struct zimage_header *)map_sysmem(image, 0);
343 if (zi->zi_magic != LINUX_ARM_ZIMAGE_MAGIC) {
344 puts("Bad Linux ARM zImage magic!\n");
348 *start = zi->zi_start;
351 printf("Kernel image @ %#08lx [ %#08lx - %#08lx ]\n", image, *start,
357 #endif /* CONFIG_CMD_BOOTZ */
359 #if defined(CONFIG_BOOTM_VXWORKS)
360 void boot_prep_vxworks(bootm_headers_t *images)
362 #if defined(CONFIG_OF_LIBFDT)
365 if (images->ft_addr) {
366 off = fdt_path_offset(images->ft_addr, "/memory");
368 if (arch_fixup_fdt(images->ft_addr))
369 puts("## WARNING: fixup memory failed!\n");
373 cleanup_before_linux();
375 void boot_jump_vxworks(bootm_headers_t *images)
377 /* ARM VxWorks requires device tree physical address to be passed */
378 ((void (*)(void *))images->ep)(images->ft_addr);