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>
15 DECLARE_GLOBAL_DATA_PTR;
17 int arch_fixup_fdt(void *blob)
23 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
24 defined(CONFIG_CMDLINE_TAG) || \
25 defined(CONFIG_INITRD_TAG) || \
26 defined(CONFIG_SERIAL_TAG) || \
27 defined(CONFIG_REVISION_TAG)
28 static void setup_start_tag(bd_t *bd);
30 # ifdef CONFIG_SETUP_MEMORY_TAGS
31 static void setup_memory_tags(bd_t *bd);
33 static void setup_commandline_tag(bd_t *bd, char *commandline);
35 # ifdef CONFIG_INITRD_TAG
36 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
38 static void setup_end_tag(bd_t *bd);
40 static struct tag *params;
41 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
43 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
47 int machid = bd->bi_arch_number;
48 void (*theKernel)(int zero, int arch, uint params);
50 #ifdef CONFIG_CMDLINE_TAG
51 char *commandline = getenv("bootargs");
55 * allow the PREP bootm subcommand, it is required for bootm to work
57 if (flag & BOOTM_STATE_OS_PREP)
60 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
63 theKernel = (void (*)(int, int, uint))images->ep;
67 machid = simple_strtoul(s, NULL, 16);
68 printf("Using machid 0x%x from environment\n", machid);
71 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
73 debug("## Transferring control to Linux (at address %08lx) ...\n",
76 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
77 defined(CONFIG_CMDLINE_TAG) || \
78 defined(CONFIG_INITRD_TAG) || \
79 defined(CONFIG_SERIAL_TAG) || \
80 defined(CONFIG_REVISION_TAG)
82 #ifdef CONFIG_SERIAL_TAG
83 setup_serial_tag(¶ms);
85 #ifdef CONFIG_REVISION_TAG
86 setup_revision_tag(¶ms);
88 #ifdef CONFIG_SETUP_MEMORY_TAGS
89 setup_memory_tags(bd);
91 #ifdef CONFIG_CMDLINE_TAG
92 setup_commandline_tag(bd, commandline);
94 #ifdef CONFIG_INITRD_TAG
95 if (images->rd_start && images->rd_end)
96 setup_initrd_tag(bd, images->rd_start, images->rd_end);
101 /* we assume that the kernel is in place */
102 printf("\nStarting kernel ...\n\n");
104 #ifdef CONFIG_USB_DEVICE
106 extern void udc_disconnect(void);
111 cleanup_before_linux();
113 theKernel(0, machid, bd->bi_boot_params);
114 /* does not return */
120 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
121 defined(CONFIG_CMDLINE_TAG) || \
122 defined(CONFIG_INITRD_TAG) || \
123 defined(CONFIG_SERIAL_TAG) || \
124 defined(CONFIG_REVISION_TAG)
125 static void setup_start_tag(bd_t *bd)
127 params = (struct tag *)bd->bi_boot_params;
129 params->hdr.tag = ATAG_CORE;
130 params->hdr.size = tag_size(tag_core);
132 params->u.core.flags = 0;
133 params->u.core.pagesize = 0;
134 params->u.core.rootdev = 0;
136 params = tag_next(params);
140 #ifdef CONFIG_SETUP_MEMORY_TAGS
141 static void setup_memory_tags(bd_t *bd)
145 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
146 params->hdr.tag = ATAG_MEM;
147 params->hdr.size = tag_size(tag_mem32);
149 params->u.mem.start = bd->bi_dram[i].start;
150 params->u.mem.size = bd->bi_dram[i].size;
152 params = tag_next(params);
155 #endif /* CONFIG_SETUP_MEMORY_TAGS */
158 static void setup_commandline_tag(bd_t *bd, char *commandline)
165 /* eat leading white space */
166 for (p = commandline; *p == ' '; p++)
169 /* skip non-existent command lines so the kernel will still
170 * use its default command line.
175 params->hdr.tag = ATAG_CMDLINE;
177 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
179 strcpy(params->u.cmdline.cmdline, p)
182 params = tag_next(params);
186 #ifdef CONFIG_INITRD_TAG
187 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
189 /* an ATAG_INITRD node tells the kernel where the compressed
190 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
192 params->hdr.tag = ATAG_INITRD2;
193 params->hdr.size = tag_size(tag_initrd);
195 params->u.initrd.start = initrd_start;
196 params->u.initrd.size = initrd_end - initrd_start;
198 params = tag_next(params);
200 #endif /* CONFIG_INITRD_TAG */
202 #ifdef CONFIG_SERIAL_TAG
203 void setup_serial_tag(struct tag **tmp)
205 struct tag *params = *tmp;
206 struct tag_serialnr serialnr;
207 void get_board_serial(struct tag_serialnr *serialnr);
209 get_board_serial(&serialnr);
210 params->hdr.tag = ATAG_SERIAL;
211 params->hdr.size = tag_size(tag_serialnr);
212 params->u.serialnr.low = serialnr.low;
213 params->u.serialnr.high = serialnr.high;
214 params = tag_next(params);
219 #ifdef CONFIG_REVISION_TAG
220 void setup_revision_tag(struct tag **in_params)
223 u32 get_board_rev(void);
225 rev = get_board_rev();
226 params->hdr.tag = ATAG_REVISION;
227 params->hdr.size = tag_size(tag_revision);
228 params->u.revision.rev = rev;
229 params = tag_next(params);
231 #endif /* CONFIG_REVISION_TAG */
234 static void setup_end_tag(bd_t *bd)
236 params->hdr.tag = ATAG_NONE;
237 params->hdr.size = 0;
240 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */