2 * (C) Copyright 2008 - 2013 Tensilica Inc.
3 * (C) Copyright 2014 Cadence Design Systems Inc.
5 * SPDX-License-Identifier: GPL-2.0+
10 #include <u-boot/zlib.h>
11 #include <asm/byteorder.h>
12 #include <asm/addrspace.h>
13 #include <asm/bootparam.h>
14 #include <asm/cache.h>
17 DECLARE_GLOBAL_DATA_PTR;
20 * Setup boot-parameters.
23 static struct bp_tag *setup_first_tag(struct bp_tag *params)
25 params->id = BP_TAG_FIRST;
26 params->size = sizeof(long);
27 *(unsigned long *)¶ms->data = BP_VERSION;
29 return bp_tag_next(params);
32 static struct bp_tag *setup_last_tag(struct bp_tag *params)
34 params->id = BP_TAG_LAST;
37 return bp_tag_next(params);
40 static struct bp_tag *setup_memory_tag(struct bp_tag *params)
42 struct bd_info *bd = gd->bd;
45 params->id = BP_TAG_MEMORY;
46 params->size = sizeof(struct meminfo);
47 mem = (struct meminfo *)params->data;
48 mem->type = MEMORY_TYPE_CONVENTIONAL;
49 mem->start = bd->bi_memstart;
50 mem->end = bd->bi_memstart + bd->bi_memsize;
52 printf(" MEMORY: tag:0x%04x, type:0X%lx, start:0X%lx, end:0X%lx\n",
53 BP_TAG_MEMORY, mem->type, mem->start, mem->end);
55 return bp_tag_next(params);
58 static struct bp_tag *setup_commandline_tag(struct bp_tag *params,
66 len = strlen(cmdline);
68 params->id = BP_TAG_COMMAND_LINE;
69 params->size = (len + 3) & -4;
70 strcpy((char *)params->data, cmdline);
72 printf(" COMMAND_LINE: tag:0x%04x, size:%u, data:'%s'\n",
73 BP_TAG_COMMAND_LINE, params->size, cmdline);
75 return bp_tag_next(params);
78 static struct bp_tag *setup_ramdisk_tag(struct bp_tag *params,
79 unsigned long rd_start,
84 if (rd_start == rd_end)
87 /* Add a single banked memory */
89 params->id = BP_TAG_INITRD;
90 params->size = sizeof(struct meminfo);
92 mem = (struct meminfo *)params->data;
93 mem->type = MEMORY_TYPE_CONVENTIONAL;
94 mem->start = PHYSADDR(rd_start);
95 mem->end = PHYSADDR(rd_end);
97 printf(" INITRD: tag:0x%x, type:0X%04lx, start:0X%lx, end:0X%lx\n",
98 BP_TAG_INITRD, mem->type, mem->start, mem->end);
100 return bp_tag_next(params);
103 static struct bp_tag *setup_serial_tag(struct bp_tag *params)
105 params->id = BP_TAG_SERIAL_BAUDRATE;
106 params->size = sizeof(unsigned long);
107 params->data[0] = gd->baudrate;
109 printf(" SERIAL_BAUDRATE: tag:0x%04x, size:%u, baudrate:%lu\n",
110 BP_TAG_SERIAL_BAUDRATE, params->size, params->data[0]);
112 return bp_tag_next(params);
115 #ifdef CONFIG_OF_LIBFDT
117 static struct bp_tag *setup_fdt_tag(struct bp_tag *params, void *fdt_start)
119 params->id = BP_TAG_FDT;
120 params->size = sizeof(unsigned long);
121 params->data[0] = (unsigned long)fdt_start;
123 printf(" FDT: tag:0x%04x, size:%u, start:0x%lx\n",
124 BP_TAG_FDT, params->size, params->data[0]);
126 return bp_tag_next(params);
135 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
137 struct bp_tag *params, *params_start;
138 ulong initrd_start, initrd_end;
139 char *commandline = getenv("bootargs");
141 if (!(flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)))
144 show_boot_progress(15);
146 if (images->rd_start) {
147 initrd_start = images->rd_start;
148 initrd_end = images->rd_end;
154 params_start = (struct bp_tag *)gd->bd->bi_boot_params;
155 params = params_start;
156 params = setup_first_tag(params);
157 params = setup_memory_tag(params);
158 params = setup_commandline_tag(params, commandline);
159 params = setup_serial_tag(params);
162 params = setup_ramdisk_tag(params, initrd_start, initrd_end);
164 #ifdef CONFIG_OF_LIBFDT
166 params = setup_fdt_tag(params, images->ft_addr);
171 params = setup_last_tag(params);
173 show_boot_progress(15);
175 printf("Transferring Control to Linux @0x%08lx ...\n\n",
178 flush_dcache_range((unsigned long)params_start, (unsigned long)params);
180 if (flag & BOOTM_STATE_OS_FAKE_GO)
184 * _start() in vmlinux expects boot params in register a2.
186 * Disable/delete your u-boot breakpoints before stepping into linux.
188 asm volatile ("mov a2, %0\n\t"
190 : : "a" (params_start), "a" (images->ep)
193 /* Does not return */