2 * Copyright (C) 2011 Andes Technology Corporation
3 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
4 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
6 * SPDX-License-Identifier: GPL-2.0+
12 #include <u-boot/zlib.h>
13 #include <asm/byteorder.h>
14 #include <asm/bootm.h>
16 DECLARE_GLOBAL_DATA_PTR;
18 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
19 defined(CONFIG_CMDLINE_TAG) || \
20 defined(CONFIG_INITRD_TAG) || \
21 defined(CONFIG_SERIAL_TAG) || \
22 defined(CONFIG_REVISION_TAG)
23 static void setup_start_tag(bd_t *bd);
25 # ifdef CONFIG_SETUP_MEMORY_TAGS
26 static void setup_memory_tags(bd_t *bd);
28 static void setup_commandline_tag(bd_t *bd, char *commandline);
30 # ifdef CONFIG_INITRD_TAG
31 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
33 static void setup_end_tag(bd_t *bd);
35 static struct tag *params;
36 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
38 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
42 int machid = bd->bi_arch_number;
43 void (*theKernel)(int zero, int arch, uint params);
45 #ifdef CONFIG_CMDLINE_TAG
46 char *commandline = env_get("bootargs");
50 * allow the PREP bootm subcommand, it is required for bootm to work
52 if (flag & BOOTM_STATE_OS_PREP)
55 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
58 theKernel = (void (*)(int, int, uint))images->ep;
60 s = env_get("machid");
62 machid = simple_strtoul(s, NULL, 16);
63 printf("Using machid 0x%x from environment\n", machid);
66 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
68 debug("## Transferring control to Linux (at address %08lx) ...\n",
71 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
72 #ifdef CONFIG_OF_LIBFDT
73 debug("using: FDT\n");
74 if (image_setup_linux(images)) {
75 printf("FDT creation failed! hanging...");
79 } else if (BOOTM_ENABLE_TAGS) {
80 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
81 defined(CONFIG_CMDLINE_TAG) || \
82 defined(CONFIG_INITRD_TAG) || \
83 defined(CONFIG_SERIAL_TAG) || \
84 defined(CONFIG_REVISION_TAG)
86 #ifdef CONFIG_SERIAL_TAG
87 setup_serial_tag(¶ms);
89 #ifdef CONFIG_REVISION_TAG
90 setup_revision_tag(¶ms);
92 #ifdef CONFIG_SETUP_MEMORY_TAGS
93 setup_memory_tags(bd);
95 #ifdef CONFIG_CMDLINE_TAG
96 setup_commandline_tag(bd, commandline);
98 #ifdef CONFIG_INITRD_TAG
99 if (images->rd_start && images->rd_end)
100 setup_initrd_tag(bd, images->rd_start, images->rd_end);
105 /* we assume that the kernel is in place */
106 printf("\nStarting kernel ...\n\n");
108 #ifdef CONFIG_USB_DEVICE
110 extern void udc_disconnect(void);
115 cleanup_before_linux();
116 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
117 theKernel(0, machid, (unsigned long)images->ft_addr);
119 theKernel(0, machid, bd->bi_boot_params);
120 /* does not return */
125 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
126 defined(CONFIG_CMDLINE_TAG) || \
127 defined(CONFIG_INITRD_TAG) || \
128 defined(CONFIG_SERIAL_TAG) || \
129 defined(CONFIG_REVISION_TAG)
130 static void setup_start_tag(bd_t *bd)
132 params = (struct tag *)bd->bi_boot_params;
134 params->hdr.tag = ATAG_CORE;
135 params->hdr.size = tag_size(tag_core);
137 params->u.core.flags = 0;
138 params->u.core.pagesize = 0;
139 params->u.core.rootdev = 0;
141 params = tag_next(params);
144 #ifdef CONFIG_SETUP_MEMORY_TAGS
145 static void setup_memory_tags(bd_t *bd)
149 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
150 params->hdr.tag = ATAG_MEM;
151 params->hdr.size = tag_size(tag_mem32);
153 params->u.mem.start = bd->bi_dram[i].start;
154 params->u.mem.size = bd->bi_dram[i].size;
156 params = tag_next(params);
159 #endif /* CONFIG_SETUP_MEMORY_TAGS */
161 static void setup_commandline_tag(bd_t *bd, char *commandline)
168 /* eat leading white space */
169 for (p = commandline; *p == ' '; p++)
172 /* skip non-existent command lines so the kernel will still
173 * use its default command line.
178 params->hdr.tag = ATAG_CMDLINE;
180 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
182 strcpy(params->u.cmdline.cmdline, p)
185 params = tag_next(params);
188 #ifdef CONFIG_INITRD_TAG
189 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
191 /* an ATAG_INITRD node tells the kernel where the compressed
192 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
194 params->hdr.tag = ATAG_INITRD2;
195 params->hdr.size = tag_size(tag_initrd);
197 params->u.initrd.start = initrd_start;
198 params->u.initrd.size = initrd_end - initrd_start;
200 params = tag_next(params);
202 #endif /* CONFIG_INITRD_TAG */
204 #ifdef CONFIG_SERIAL_TAG
205 void setup_serial_tag(struct tag **tmp)
207 struct tag *params = *tmp;
208 struct tag_serialnr serialnr;
209 void get_board_serial(struct tag_serialnr *serialnr);
211 get_board_serial(&serialnr);
212 params->hdr.tag = ATAG_SERIAL;
213 params->hdr.size = tag_size(tag_serialnr);
214 params->u.serialnr.low = serialnr.low;
215 params->u.serialnr.high = serialnr.high;
216 params = tag_next(params);
221 #ifdef CONFIG_REVISION_TAG
222 void setup_revision_tag(struct tag **in_params)
225 u32 get_board_rev(void);
227 rev = get_board_rev();
228 params->hdr.tag = ATAG_REVISION;
229 params->hdr.size = tag_size(tag_revision);
230 params->u.revision.rev = rev;
231 params = tag_next(params);
233 #endif /* CONFIG_REVISION_TAG */
235 static void setup_end_tag(bd_t *bd)
237 params->hdr.tag = ATAG_NONE;
238 params->hdr.size = 0;
241 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */