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>
15 #include <u-boot/zlib.h>
16 #include <asm/byteorder.h>
17 #include <asm/bootm.h>
19 DECLARE_GLOBAL_DATA_PTR;
21 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
22 defined(CONFIG_CMDLINE_TAG) || \
23 defined(CONFIG_INITRD_TAG) || \
24 defined(CONFIG_SERIAL_TAG) || \
25 defined(CONFIG_REVISION_TAG)
26 static void setup_start_tag(bd_t *bd);
28 # ifdef CONFIG_SETUP_MEMORY_TAGS
29 static void setup_memory_tags(bd_t *bd);
31 static void setup_commandline_tag(bd_t *bd, char *commandline);
33 # ifdef CONFIG_INITRD_TAG
34 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
36 static void setup_end_tag(bd_t *bd);
38 static struct tag *params;
39 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
41 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
45 int machid = bd->bi_arch_number;
46 void (*theKernel)(int zero, int arch, uint params);
48 #ifdef CONFIG_CMDLINE_TAG
49 char *commandline = env_get("bootargs");
53 * allow the PREP bootm subcommand, it is required for bootm to work
55 if (flag & BOOTM_STATE_OS_PREP)
58 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
61 theKernel = (void (*)(int, int, uint))images->ep;
63 s = env_get("machid");
65 machid = simple_strtoul(s, NULL, 16);
66 printf("Using machid 0x%x from environment\n", machid);
69 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
71 debug("## Transferring control to Linux (at address %08lx) ...\n",
74 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
75 #ifdef CONFIG_OF_LIBFDT
76 debug("using: FDT\n");
77 if (image_setup_linux(images)) {
78 printf("FDT creation failed! hanging...");
82 } else if (BOOTM_ENABLE_TAGS) {
83 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
84 defined(CONFIG_CMDLINE_TAG) || \
85 defined(CONFIG_INITRD_TAG) || \
86 defined(CONFIG_SERIAL_TAG) || \
87 defined(CONFIG_REVISION_TAG)
89 #ifdef CONFIG_SERIAL_TAG
90 setup_serial_tag(¶ms);
92 #ifdef CONFIG_REVISION_TAG
93 setup_revision_tag(¶ms);
95 #ifdef CONFIG_SETUP_MEMORY_TAGS
96 setup_memory_tags(bd);
98 #ifdef CONFIG_CMDLINE_TAG
99 setup_commandline_tag(bd, commandline);
101 #ifdef CONFIG_INITRD_TAG
102 if (images->rd_start && images->rd_end)
103 setup_initrd_tag(bd, images->rd_start, images->rd_end);
108 /* we assume that the kernel is in place */
109 printf("\nStarting kernel ...\n\n");
111 #ifdef CONFIG_USB_DEVICE
113 extern void udc_disconnect(void);
118 cleanup_before_linux();
119 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
120 theKernel(0, machid, (unsigned long)images->ft_addr);
122 theKernel(0, machid, bd->bi_boot_params);
123 /* does not return */
128 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
129 defined(CONFIG_CMDLINE_TAG) || \
130 defined(CONFIG_INITRD_TAG) || \
131 defined(CONFIG_SERIAL_TAG) || \
132 defined(CONFIG_REVISION_TAG)
133 static void setup_start_tag(bd_t *bd)
135 params = (struct tag *)bd->bi_boot_params;
137 params->hdr.tag = ATAG_CORE;
138 params->hdr.size = tag_size(tag_core);
140 params->u.core.flags = 0;
141 params->u.core.pagesize = 0;
142 params->u.core.rootdev = 0;
144 params = tag_next(params);
147 #ifdef CONFIG_SETUP_MEMORY_TAGS
148 static void setup_memory_tags(bd_t *bd)
152 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
153 params->hdr.tag = ATAG_MEM;
154 params->hdr.size = tag_size(tag_mem32);
156 params->u.mem.start = bd->bi_dram[i].start;
157 params->u.mem.size = bd->bi_dram[i].size;
159 params = tag_next(params);
162 #endif /* CONFIG_SETUP_MEMORY_TAGS */
164 static void setup_commandline_tag(bd_t *bd, char *commandline)
171 /* eat leading white space */
172 for (p = commandline; *p == ' '; p++)
175 /* skip non-existent command lines so the kernel will still
176 * use its default command line.
181 params->hdr.tag = ATAG_CMDLINE;
183 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
185 strcpy(params->u.cmdline.cmdline, p)
188 params = tag_next(params);
191 #ifdef CONFIG_INITRD_TAG
192 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
194 /* an ATAG_INITRD node tells the kernel where the compressed
195 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
197 params->hdr.tag = ATAG_INITRD2;
198 params->hdr.size = tag_size(tag_initrd);
200 params->u.initrd.start = initrd_start;
201 params->u.initrd.size = initrd_end - initrd_start;
203 params = tag_next(params);
205 #endif /* CONFIG_INITRD_TAG */
207 #ifdef CONFIG_SERIAL_TAG
208 void setup_serial_tag(struct tag **tmp)
210 struct tag *params = *tmp;
211 struct tag_serialnr serialnr;
212 void get_board_serial(struct tag_serialnr *serialnr);
214 get_board_serial(&serialnr);
215 params->hdr.tag = ATAG_SERIAL;
216 params->hdr.size = tag_size(tag_serialnr);
217 params->u.serialnr.low = serialnr.low;
218 params->u.serialnr.high = serialnr.high;
219 params = tag_next(params);
224 #ifdef CONFIG_REVISION_TAG
225 void setup_revision_tag(struct tag **in_params)
228 u32 get_board_rev(void);
230 rev = get_board_rev();
231 params->hdr.tag = ATAG_REVISION;
232 params->hdr.size = tag_size(tag_revision);
233 params->u.revision.rev = rev;
234 params = tag_next(params);
236 #endif /* CONFIG_REVISION_TAG */
238 static void setup_end_tag(bd_t *bd)
240 params->hdr.tag = ATAG_NONE;
241 params->hdr.size = 0;
244 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */