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1 /*
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>
5  * Rick Chen, Andes Technology Corporation <rick@andestech.com>
6  *
7  * SPDX-License-Identifier:     GPL-2.0+
8  */
9
10 #include <common.h>
11 #include <command.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 int arch_fixup_fdt(void *blob)
20 {
21         return 0;
22 }
23
24 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
25         defined(CONFIG_CMDLINE_TAG) || \
26         defined(CONFIG_INITRD_TAG) || \
27         defined(CONFIG_SERIAL_TAG) || \
28         defined(CONFIG_REVISION_TAG)
29 static void setup_start_tag(bd_t *bd);
30
31 # ifdef CONFIG_SETUP_MEMORY_TAGS
32 static void setup_memory_tags(bd_t *bd);
33 # endif
34 static void setup_commandline_tag(bd_t *bd, char *commandline);
35
36 # ifdef CONFIG_INITRD_TAG
37 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
38 # endif
39 static void setup_end_tag(bd_t *bd);
40
41 static struct tag *params;
42 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
43
44 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
45 {
46         bd_t    *bd = gd->bd;
47         char    *s;
48         int     machid = bd->bi_arch_number;
49         void    (*theKernel)(int zero, int arch, uint params);
50
51 #ifdef CONFIG_CMDLINE_TAG
52         char *commandline = env_get("bootargs");
53 #endif
54
55         /*
56          * allow the PREP bootm subcommand, it is required for bootm to work
57          */
58         if (flag & BOOTM_STATE_OS_PREP)
59                 return 0;
60
61         if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
62                 return 1;
63
64         theKernel = (void (*)(int, int, uint))images->ep;
65
66         s = env_get("machid");
67         if (s) {
68                 machid = simple_strtoul(s, NULL, 16);
69                 printf("Using machid 0x%x from environment\n", machid);
70         }
71
72         bootstage_mark(BOOTSTAGE_ID_RUN_OS);
73
74         debug("## Transferring control to Linux (at address %08lx) ...\n",
75                (ulong)theKernel);
76
77         if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
78 #ifdef CONFIG_OF_LIBFDT
79                 debug("using: FDT\n");
80                 if (image_setup_linux(images)) {
81                         printf("FDT creation failed! hanging...");
82                         hang();
83                 }
84 #endif
85         } else if (BOOTM_ENABLE_TAGS) {
86 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
87         defined(CONFIG_CMDLINE_TAG) || \
88         defined(CONFIG_INITRD_TAG) || \
89         defined(CONFIG_SERIAL_TAG) || \
90         defined(CONFIG_REVISION_TAG)
91         setup_start_tag(bd);
92 #ifdef CONFIG_SERIAL_TAG
93         setup_serial_tag(&params);
94 #endif
95 #ifdef CONFIG_REVISION_TAG
96         setup_revision_tag(&params);
97 #endif
98 #ifdef CONFIG_SETUP_MEMORY_TAGS
99         setup_memory_tags(bd);
100 #endif
101 #ifdef CONFIG_CMDLINE_TAG
102         setup_commandline_tag(bd, commandline);
103 #endif
104 #ifdef CONFIG_INITRD_TAG
105         if (images->rd_start && images->rd_end)
106                 setup_initrd_tag(bd, images->rd_start, images->rd_end);
107 #endif
108         setup_end_tag(bd);
109 #endif
110
111         /* we assume that the kernel is in place */
112         printf("\nStarting kernel ...\n\n");
113
114 #ifdef CONFIG_USB_DEVICE
115         {
116                 extern void udc_disconnect(void);
117                 udc_disconnect();
118         }
119 #endif
120         }
121         cleanup_before_linux();
122         if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
123                 theKernel(0, machid, (unsigned long)images->ft_addr);
124         else
125         theKernel(0, machid, bd->bi_boot_params);
126         /* does not return */
127
128         return 1;
129 }
130
131 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
132         defined(CONFIG_CMDLINE_TAG) || \
133         defined(CONFIG_INITRD_TAG) || \
134         defined(CONFIG_SERIAL_TAG) || \
135         defined(CONFIG_REVISION_TAG)
136 static void setup_start_tag(bd_t *bd)
137 {
138         params = (struct tag *)bd->bi_boot_params;
139
140         params->hdr.tag = ATAG_CORE;
141         params->hdr.size = tag_size(tag_core);
142
143         params->u.core.flags = 0;
144         params->u.core.pagesize = 0;
145         params->u.core.rootdev = 0;
146
147         params = tag_next(params);
148 }
149
150 #ifdef CONFIG_SETUP_MEMORY_TAGS
151 static void setup_memory_tags(bd_t *bd)
152 {
153         int i;
154
155         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
156                 params->hdr.tag = ATAG_MEM;
157                 params->hdr.size = tag_size(tag_mem32);
158
159                 params->u.mem.start = bd->bi_dram[i].start;
160                 params->u.mem.size = bd->bi_dram[i].size;
161
162                 params = tag_next(params);
163         }
164 }
165 #endif /* CONFIG_SETUP_MEMORY_TAGS */
166
167 static void setup_commandline_tag(bd_t *bd, char *commandline)
168 {
169         char *p;
170
171         if (!commandline)
172                 return;
173
174         /* eat leading white space */
175         for (p = commandline; *p == ' '; p++)
176                 ;
177
178         /* skip non-existent command lines so the kernel will still
179          * use its default command line.
180          */
181         if (*p == '\0')
182                 return;
183
184         params->hdr.tag = ATAG_CMDLINE;
185         params->hdr.size =
186                 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
187
188         strcpy(params->u.cmdline.cmdline, p)
189                 ;
190
191         params = tag_next(params);
192 }
193
194 #ifdef CONFIG_INITRD_TAG
195 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
196 {
197         /* an ATAG_INITRD node tells the kernel where the compressed
198          * ramdisk can be found. ATAG_RDIMG is a better name, actually.
199          */
200         params->hdr.tag = ATAG_INITRD2;
201         params->hdr.size = tag_size(tag_initrd);
202
203         params->u.initrd.start = initrd_start;
204         params->u.initrd.size = initrd_end - initrd_start;
205
206         params = tag_next(params);
207 }
208 #endif /* CONFIG_INITRD_TAG */
209
210 #ifdef CONFIG_SERIAL_TAG
211 void setup_serial_tag(struct tag **tmp)
212 {
213         void get_board_serial(struct tag_serialnr *serialnr);
214         struct tag *params;
215         struct tag_serialnr serialnr;
216
217         params = *tmp;
218         get_board_serial(&serialnr);
219         params->hdr.tag = ATAG_SERIAL;
220         params->hdr.size = tag_size(tag_serialnr);
221         params->u.serialnr.low = serialnr.low;
222         params->u.serialnr.high = serialnr.high;
223         params = tag_next(params);
224         *tmp = params;
225 }
226 #endif
227
228 #ifdef CONFIG_REVISION_TAG
229 void setup_revision_tag(struct tag **in_params)
230 {
231         u32 get_board_rev(void);
232         u32 rev;
233
234         rev = get_board_rev();
235         params->hdr.tag = ATAG_REVISION;
236         params->hdr.size = tag_size(tag_revision);
237         params->u.revision.rev = rev;
238         params = tag_next(params);
239 }
240 #endif  /* CONFIG_REVISION_TAG */
241
242 static void setup_end_tag(bd_t *bd)
243 {
244         params->hdr.tag = ATAG_NONE;
245         params->hdr.size = 0;
246 }
247
248 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */