1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2011 Andes Technology Corporation
4 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
5 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
13 #include <u-boot/zlib.h>
14 #include <asm/byteorder.h>
15 #include <asm/bootm.h>
17 DECLARE_GLOBAL_DATA_PTR;
19 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
20 defined(CONFIG_CMDLINE_TAG) || \
21 defined(CONFIG_INITRD_TAG) || \
22 defined(CONFIG_SERIAL_TAG) || \
23 defined(CONFIG_REVISION_TAG)
24 static void setup_start_tag(bd_t *bd);
26 # ifdef CONFIG_SETUP_MEMORY_TAGS
27 static void setup_memory_tags(bd_t *bd);
29 static void setup_commandline_tag(bd_t *bd, char *commandline);
31 # ifdef CONFIG_INITRD_TAG
32 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
34 static void setup_end_tag(bd_t *bd);
36 static struct tag *params;
37 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
39 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
43 int machid = bd->bi_arch_number;
44 void (*theKernel)(int zero, int arch, uint params);
46 #ifdef CONFIG_CMDLINE_TAG
47 char *commandline = env_get("bootargs");
51 * allow the PREP bootm subcommand, it is required for bootm to work
53 if (flag & BOOTM_STATE_OS_PREP)
56 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
59 theKernel = (void (*)(int, int, uint))images->ep;
61 s = env_get("machid");
63 machid = simple_strtoul(s, NULL, 16);
64 printf("Using machid 0x%x from environment\n", machid);
67 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
69 debug("## Transferring control to Linux (at address %08lx) ...\n",
72 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
73 #ifdef CONFIG_OF_LIBFDT
74 debug("using: FDT\n");
75 if (image_setup_linux(images)) {
76 printf("FDT creation failed! hanging...");
80 } else if (BOOTM_ENABLE_TAGS) {
81 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
82 defined(CONFIG_CMDLINE_TAG) || \
83 defined(CONFIG_INITRD_TAG) || \
84 defined(CONFIG_SERIAL_TAG) || \
85 defined(CONFIG_REVISION_TAG)
87 #ifdef CONFIG_SERIAL_TAG
88 setup_serial_tag(¶ms);
90 #ifdef CONFIG_REVISION_TAG
91 setup_revision_tag(¶ms);
93 #ifdef CONFIG_SETUP_MEMORY_TAGS
94 setup_memory_tags(bd);
96 #ifdef CONFIG_CMDLINE_TAG
97 setup_commandline_tag(bd, commandline);
99 #ifdef CONFIG_INITRD_TAG
100 if (images->rd_start && images->rd_end)
101 setup_initrd_tag(bd, images->rd_start, images->rd_end);
106 /* we assume that the kernel is in place */
107 printf("\nStarting kernel ...\n\n");
109 #ifdef CONFIG_USB_DEVICE
111 extern void udc_disconnect(void);
116 cleanup_before_linux();
117 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
118 theKernel(0, machid, (unsigned long)images->ft_addr);
120 theKernel(0, machid, bd->bi_boot_params);
121 /* does not return */
126 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
127 defined(CONFIG_CMDLINE_TAG) || \
128 defined(CONFIG_INITRD_TAG) || \
129 defined(CONFIG_SERIAL_TAG) || \
130 defined(CONFIG_REVISION_TAG)
131 static void setup_start_tag(bd_t *bd)
133 params = (struct tag *)bd->bi_boot_params;
135 params->hdr.tag = ATAG_CORE;
136 params->hdr.size = tag_size(tag_core);
138 params->u.core.flags = 0;
139 params->u.core.pagesize = 0;
140 params->u.core.rootdev = 0;
142 params = tag_next(params);
145 #ifdef CONFIG_SETUP_MEMORY_TAGS
146 static void setup_memory_tags(bd_t *bd)
150 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
151 params->hdr.tag = ATAG_MEM;
152 params->hdr.size = tag_size(tag_mem32);
154 params->u.mem.start = bd->bi_dram[i].start;
155 params->u.mem.size = bd->bi_dram[i].size;
157 params = tag_next(params);
160 #endif /* CONFIG_SETUP_MEMORY_TAGS */
162 static void setup_commandline_tag(bd_t *bd, char *commandline)
169 /* eat leading white space */
170 for (p = commandline; *p == ' '; p++)
173 /* skip non-existent command lines so the kernel will still
174 * use its default command line.
179 params->hdr.tag = ATAG_CMDLINE;
181 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
183 strcpy(params->u.cmdline.cmdline, p)
186 params = tag_next(params);
189 #ifdef CONFIG_INITRD_TAG
190 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
192 /* an ATAG_INITRD node tells the kernel where the compressed
193 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
195 params->hdr.tag = ATAG_INITRD2;
196 params->hdr.size = tag_size(tag_initrd);
198 params->u.initrd.start = initrd_start;
199 params->u.initrd.size = initrd_end - initrd_start;
201 params = tag_next(params);
203 #endif /* CONFIG_INITRD_TAG */
205 #ifdef CONFIG_SERIAL_TAG
206 void setup_serial_tag(struct tag **tmp)
208 struct tag *params = *tmp;
209 struct tag_serialnr serialnr;
210 void get_board_serial(struct tag_serialnr *serialnr);
212 get_board_serial(&serialnr);
213 params->hdr.tag = ATAG_SERIAL;
214 params->hdr.size = tag_size(tag_serialnr);
215 params->u.serialnr.low = serialnr.low;
216 params->u.serialnr.high = serialnr.high;
217 params = tag_next(params);
222 #ifdef CONFIG_REVISION_TAG
223 void setup_revision_tag(struct tag **in_params)
226 u32 get_board_rev(void);
228 rev = get_board_rev();
229 params->hdr.tag = ATAG_REVISION;
230 params->hdr.size = tag_size(tag_revision);
231 params->u.revision.rev = rev;
232 params = tag_next(params);
234 #endif /* CONFIG_REVISION_TAG */
236 static void setup_end_tag(bd_t *bd)
238 params->hdr.tag = ATAG_NONE;
239 params->hdr.size = 0;
242 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */