common: Move hang() to the same header as panic()
[oweals/u-boot.git] / arch / nds32 / lib / bootm.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
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>
6  */
7
8 #include <common.h>
9 #include <command.h>
10 #include <env.h>
11 #include <hang.h>
12 #include <image.h>
13 #include <u-boot/zlib.h>
14 #include <asm/byteorder.h>
15 #include <asm/bootm.h>
16
17 DECLARE_GLOBAL_DATA_PTR;
18
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);
25
26 # ifdef CONFIG_SETUP_MEMORY_TAGS
27 static void setup_memory_tags(bd_t *bd);
28 # endif
29 static void setup_commandline_tag(bd_t *bd, char *commandline);
30
31 # ifdef CONFIG_INITRD_TAG
32 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
33 # endif
34 static void setup_end_tag(bd_t *bd);
35
36 static struct tag *params;
37 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
38
39 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
40 {
41         bd_t    *bd = gd->bd;
42         char    *s;
43         int     machid = bd->bi_arch_number;
44         void    (*theKernel)(int zero, int arch, uint params);
45
46 #ifdef CONFIG_CMDLINE_TAG
47         char *commandline = env_get("bootargs");
48 #endif
49
50         /*
51          * allow the PREP bootm subcommand, it is required for bootm to work
52          */
53         if (flag & BOOTM_STATE_OS_PREP)
54                 return 0;
55
56         if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
57                 return 1;
58
59         theKernel = (void (*)(int, int, uint))images->ep;
60
61         s = env_get("machid");
62         if (s) {
63                 machid = simple_strtoul(s, NULL, 16);
64                 printf("Using machid 0x%x from environment\n", machid);
65         }
66
67         bootstage_mark(BOOTSTAGE_ID_RUN_OS);
68
69         debug("## Transferring control to Linux (at address %08lx) ...\n",
70                (ulong)theKernel);
71
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...");
77                         hang();
78                 }
79 #endif
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)
86         setup_start_tag(bd);
87 #ifdef CONFIG_SERIAL_TAG
88         setup_serial_tag(&params);
89 #endif
90 #ifdef CONFIG_REVISION_TAG
91         setup_revision_tag(&params);
92 #endif
93 #ifdef CONFIG_SETUP_MEMORY_TAGS
94         setup_memory_tags(bd);
95 #endif
96 #ifdef CONFIG_CMDLINE_TAG
97         setup_commandline_tag(bd, commandline);
98 #endif
99 #ifdef CONFIG_INITRD_TAG
100         if (images->rd_start && images->rd_end)
101                 setup_initrd_tag(bd, images->rd_start, images->rd_end);
102 #endif
103         setup_end_tag(bd);
104 #endif
105
106         /* we assume that the kernel is in place */
107         printf("\nStarting kernel ...\n\n");
108
109 #ifdef CONFIG_USB_DEVICE
110         {
111                 extern void udc_disconnect(void);
112                 udc_disconnect();
113         }
114 #endif
115         }
116         cleanup_before_linux();
117         if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
118                 theKernel(0, machid, (unsigned long)images->ft_addr);
119         else
120                 theKernel(0, machid, bd->bi_boot_params);
121         /* does not return */
122
123         return 1;
124 }
125
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)
132 {
133         params = (struct tag *)bd->bi_boot_params;
134
135         params->hdr.tag = ATAG_CORE;
136         params->hdr.size = tag_size(tag_core);
137
138         params->u.core.flags = 0;
139         params->u.core.pagesize = 0;
140         params->u.core.rootdev = 0;
141
142         params = tag_next(params);
143 }
144
145 #ifdef CONFIG_SETUP_MEMORY_TAGS
146 static void setup_memory_tags(bd_t *bd)
147 {
148         int i;
149
150         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
151                 params->hdr.tag = ATAG_MEM;
152                 params->hdr.size = tag_size(tag_mem32);
153
154                 params->u.mem.start = bd->bi_dram[i].start;
155                 params->u.mem.size = bd->bi_dram[i].size;
156
157                 params = tag_next(params);
158         }
159 }
160 #endif /* CONFIG_SETUP_MEMORY_TAGS */
161
162 static void setup_commandline_tag(bd_t *bd, char *commandline)
163 {
164         char *p;
165
166         if (!commandline)
167                 return;
168
169         /* eat leading white space */
170         for (p = commandline; *p == ' '; p++)
171                 ;
172
173         /* skip non-existent command lines so the kernel will still
174          * use its default command line.
175          */
176         if (*p == '\0')
177                 return;
178
179         params->hdr.tag = ATAG_CMDLINE;
180         params->hdr.size =
181                 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
182
183         strcpy(params->u.cmdline.cmdline, p)
184                 ;
185
186         params = tag_next(params);
187 }
188
189 #ifdef CONFIG_INITRD_TAG
190 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
191 {
192         /* an ATAG_INITRD node tells the kernel where the compressed
193          * ramdisk can be found. ATAG_RDIMG is a better name, actually.
194          */
195         params->hdr.tag = ATAG_INITRD2;
196         params->hdr.size = tag_size(tag_initrd);
197
198         params->u.initrd.start = initrd_start;
199         params->u.initrd.size = initrd_end - initrd_start;
200
201         params = tag_next(params);
202 }
203 #endif /* CONFIG_INITRD_TAG */
204
205 #ifdef CONFIG_SERIAL_TAG
206 void setup_serial_tag(struct tag **tmp)
207 {
208         struct tag *params = *tmp;
209         struct tag_serialnr serialnr;
210         void get_board_serial(struct tag_serialnr *serialnr);
211
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);
218         *tmp = params;
219 }
220 #endif
221
222 #ifdef CONFIG_REVISION_TAG
223 void setup_revision_tag(struct tag **in_params)
224 {
225         u32 rev = 0;
226         u32 get_board_rev(void);
227
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);
233 }
234 #endif  /* CONFIG_REVISION_TAG */
235
236 static void setup_end_tag(bd_t *bd)
237 {
238         params->hdr.tag = ATAG_NONE;
239         params->hdr.size = 0;
240 }
241
242 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */