xref: /openbmc/u-boot/cmd/cramfs.c (revision 413ab5b0)
1 /*
2  * SPDX-License-Identifier:	GPL-2.0+
3  *
4  * based on: cmd_jffs2.c
5  *
6  * 	Add support for a CRAMFS located in RAM
7  */
8 
9 
10 /*
11  * CRAMFS support
12  */
13 #include <common.h>
14 #include <command.h>
15 #include <malloc.h>
16 #include <mapmem.h>
17 #include <linux/list.h>
18 #include <linux/ctype.h>
19 #include <jffs2/jffs2.h>
20 #include <jffs2/load_kernel.h>
21 #include <cramfs/cramfs_fs.h>
22 #include <asm/io.h>
23 
24 /* enable/disable debugging messages */
25 #define	DEBUG_CRAMFS
26 #undef	DEBUG_CRAMFS
27 
28 #ifdef  DEBUG_CRAMFS
29 # define DEBUGF(fmt, args...)	printf(fmt ,##args)
30 #else
31 # define DEBUGF(fmt, args...)
32 #endif
33 
34 #include <flash.h>
35 
36 #ifndef CONFIG_MTD_NOR_FLASH
37 # define OFFSET_ADJUSTMENT	0
38 #else
39 # define OFFSET_ADJUSTMENT	(flash_info[id.num].start[0])
40 #endif
41 
42 #ifndef CONFIG_FS_JFFS2
43 #include <linux/stat.h>
44 char *mkmodestr(unsigned long mode, char *str)
45 {
46 	static const char *l = "xwr";
47 	int mask = 1, i;
48 	char c;
49 
50 	switch (mode & S_IFMT) {
51 		case S_IFDIR:    str[0] = 'd'; break;
52 		case S_IFBLK:    str[0] = 'b'; break;
53 		case S_IFCHR:    str[0] = 'c'; break;
54 		case S_IFIFO:    str[0] = 'f'; break;
55 		case S_IFLNK:    str[0] = 'l'; break;
56 		case S_IFSOCK:   str[0] = 's'; break;
57 		case S_IFREG:    str[0] = '-'; break;
58 		default:         str[0] = '?';
59 	}
60 
61 	for(i = 0; i < 9; i++) {
62 		c = l[i%3];
63 		str[9-i] = (mode & mask)?c:'-';
64 		mask = mask<<1;
65 	}
66 
67 	if(mode & S_ISUID) str[3] = (mode & S_IXUSR)?'s':'S';
68 	if(mode & S_ISGID) str[6] = (mode & S_IXGRP)?'s':'S';
69 	if(mode & S_ISVTX) str[9] = (mode & S_IXOTH)?'t':'T';
70 	str[10] = '\0';
71 	return str;
72 }
73 #endif /* CONFIG_FS_JFFS2 */
74 
75 extern int cramfs_check (struct part_info *info);
76 extern int cramfs_load (char *loadoffset, struct part_info *info, char *filename);
77 extern int cramfs_ls (struct part_info *info, char *filename);
78 extern int cramfs_info (struct part_info *info);
79 
80 /***************************************************/
81 /* U-Boot commands				   */
82 /***************************************************/
83 
84 /**
85  * Routine implementing fsload u-boot command. This routine tries to load
86  * a requested file from cramfs filesystem at location 'cramfsaddr'.
87  * cramfsaddr is an evironment variable.
88  *
89  * @param cmdtp command internal data
90  * @param flag command flag
91  * @param argc number of arguments supplied to the command
92  * @param argv arguments list
93  * @return 0 on success, 1 otherwise
94  */
95 int do_cramfs_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
96 {
97 	char *filename;
98 	int size;
99 	ulong offset = load_addr;
100 	char *offset_virt;
101 
102 	struct part_info part;
103 	struct mtd_device dev;
104 	struct mtdids id;
105 
106 	ulong addr;
107 	addr = simple_strtoul(env_get("cramfsaddr"), NULL, 16);
108 
109 	/* hack! */
110 	/* cramfs_* only supports NOR flash chips */
111 	/* fake the device type */
112 	id.type = MTD_DEV_TYPE_NOR;
113 	id.num = 0;
114 	dev.id = &id;
115 	part.dev = &dev;
116 	/* fake the address offset */
117 	part.offset = (u64)(uintptr_t) map_sysmem(addr - OFFSET_ADJUSTMENT, 0);
118 
119 	/* pre-set Boot file name */
120 	filename = env_get("bootfile");
121 	if (!filename)
122 		filename = "uImage";
123 
124 	if (argc == 2) {
125 		filename = argv[1];
126 	}
127 	if (argc == 3) {
128 		offset = simple_strtoul(argv[1], NULL, 0);
129 		load_addr = offset;
130 		filename = argv[2];
131 	}
132 
133 	offset_virt = map_sysmem(offset, 0);
134 	size = 0;
135 	if (cramfs_check(&part))
136 		size = cramfs_load (offset_virt, &part, filename);
137 
138 	if (size > 0) {
139 		printf("### CRAMFS load complete: %d bytes loaded to 0x%lx\n",
140 			size, offset);
141 		env_set_hex("filesize", size);
142 	} else {
143 		printf("### CRAMFS LOAD ERROR<%x> for %s!\n", size, filename);
144 	}
145 
146 	unmap_sysmem(offset_virt);
147 	unmap_sysmem((void *)(uintptr_t)part.offset);
148 
149 	return !(size > 0);
150 }
151 
152 /**
153  * Routine implementing u-boot ls command which lists content of a given
154  * directory at location 'cramfsaddr'.
155  * cramfsaddr is an evironment variable.
156  *
157  * @param cmdtp command internal data
158  * @param flag command flag
159  * @param argc number of arguments supplied to the command
160  * @param argv arguments list
161  * @return 0 on success, 1 otherwise
162  */
163 int do_cramfs_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
164 {
165 	char *filename = "/";
166 	int ret;
167 	struct part_info part;
168 	struct mtd_device dev;
169 	struct mtdids id;
170 
171 	ulong addr;
172 	addr = simple_strtoul(env_get("cramfsaddr"), NULL, 16);
173 
174 	/* hack! */
175 	/* cramfs_* only supports NOR flash chips */
176 	/* fake the device type */
177 	id.type = MTD_DEV_TYPE_NOR;
178 	id.num = 0;
179 	dev.id = &id;
180 	part.dev = &dev;
181 	/* fake the address offset */
182 	part.offset = (u64)(uintptr_t) map_sysmem(addr - OFFSET_ADJUSTMENT, 0);
183 
184 	if (argc == 2)
185 		filename = argv[1];
186 
187 	ret = 0;
188 	if (cramfs_check(&part))
189 		ret = cramfs_ls (&part, filename);
190 	unmap_sysmem((void *)(uintptr_t)part.offset);
191 
192 	return ret ? 0 : 1;
193 }
194 
195 /* command line only */
196 
197 /***************************************************/
198 U_BOOT_CMD(
199 	cramfsload,	3,	0,	do_cramfs_load,
200 	"load binary file from a filesystem image",
201 	"[ off ] [ filename ]\n"
202 	"    - load binary file from address 'cramfsaddr'\n"
203 	"      with offset 'off'\n"
204 );
205 U_BOOT_CMD(
206 	cramfsls,	2,	1,	do_cramfs_ls,
207 	"list files in a directory (default /)",
208 	"[ directory ]\n"
209 	"    - list files in a directory.\n"
210 );
211