2 * fs_of.c - an implementation for OpenFirmware supported filesystems
4 * Copyright (C) 2001, 2002 Ethan Benson
6 * Copyright (C) 1999 Benjamin Herrenschmidt
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 * BrokenFirmware cannot "read" from the network. We use tftp "load"
25 * method for network boot for now, we may provide our own NFS
26 * implementation in a later version. That means that we allocate a
27 * huge block of memory for the entire file before loading it. We use
28 * the location where the kernel puts RTAS, it's not used by the
29 * bootloader and if freed when the kernel is booted. This will have
30 * to be changed if we plan to instanciate RTAS in the bootloader
41 #include "partition.h"
42 #include "fdisk-part.h"
47 #define LOAD_BUFFER_POS 0x1000000
48 #define LOAD_BUFFER_SIZE 0x1800000
50 static int of_open(struct boot_file_t* file,
51 struct partition_t* part, struct boot_fspec_t* fspec);
52 static int of_read(struct boot_file_t* file, unsigned int size, void* buffer);
53 static int of_seek(struct boot_file_t* file, unsigned int newpos);
54 static int of_close(struct boot_file_t* file);
57 static int of_net_open(struct boot_file_t* file,
58 struct partition_t* part, struct boot_fspec_t* fspec);
59 static int of_net_read(struct boot_file_t* file, unsigned int size, void* buffer);
60 static int of_net_seek(struct boot_file_t* file, unsigned int newpos);
61 static unsigned int of_net_ino_size(struct boot_file_t* file);
64 struct fs_t of_filesystem =
73 struct fs_t of_net_filesystem =
84 of_open(struct boot_file_t* file,
85 struct partition_t* part, struct boot_fspec_t* fspec)
87 static char buffer[1024];
94 strncpy(buffer, fspec->dev, 768);
97 if (part->sys_ind == LINUX_RAID || part->sys_ind == LINUX_NATIVE) {
98 DEBUG_F("skipping because partition is tagged %08x\n",
100 DEBUG_LEAVE(FILE_ERR_BAD_FSYS);
101 return FILE_ERR_BAD_FSYS;
104 sprintf(pn, "%02d", part->part_number);
107 if (fspec->file && strlen(fspec->file)) {
110 filename = strdup(fspec->file);
111 for (p = filename; *p; p++)
114 strcat(buffer, filename);
118 DEBUG_F("opening: \"%s\"\n", buffer);
120 file->of_device = prom_open(buffer);
122 DEBUG_F("file->of_device = %p\n", file->of_device);
126 if ((file->of_device == PROM_INVALID_HANDLE) || (file->of_device == 0))
128 DEBUG_LEAVE(FILE_ERR_BAD_FSYS);
129 return FILE_ERR_BAD_FSYS;
132 DEBUG_LEAVE(FILE_ERR_OK);
137 of_net_open(struct boot_file_t* file,
138 struct partition_t* part, struct boot_fspec_t* fspec)
140 static char buffer[1024];
141 char *filename = NULL;
148 if (fspec->file && strlen(fspec->file)) {
149 filename = strdup(fspec->file);
150 for (p = filename; *p; p++)
155 DEBUG_F("siaddr <%s>; filename <%s>; ciaddr <%s>; giaddr <%s>;"
157 fspec->siaddr, filename, fspec->ciaddr, fspec->giaddr,
160 strncpy(buffer, fspec->dev, 768);
161 /* If we didn't get a ':' include one */
162 if (fspec->dev[strlen(fspec->dev)-1] != ':')
165 /* If /packages/cas exists the we have a "new skool" tftp.
166 * This means that siaddr is the tftp server and that we can add
167 * {tftp,bootp}_retrys, subnet mask and tftp block size to the load
169 new_tftp = (prom_finddevice("/packages/cas") != PROM_INVALID_HANDLE);
170 DEBUG_F("Using %s tftp style\n", (new_tftp? "new": "old"));
173 strcat(buffer, fspec->siaddr);
176 if (fspec->is_ipv6 && (strstr(filename, "filename=") == NULL))
177 strcat(buffer, "filename=");
179 strcat(buffer, filename);
181 strcat(buffer, fspec->ciaddr);
183 strcat(buffer, fspec->giaddr);
185 strcat(buffer, fspec->bootp_retries);
187 strcat(buffer, fspec->tftp_retries);
189 strcat(buffer, fspec->subnetmask);
191 strcat(buffer, fspec->addl_params);
194 strcat(buffer, filename);
197 DEBUG_F("Opening: \"%s\"\n", buffer);
199 file->of_device = prom_open(buffer);
201 DEBUG_F("file->of_device = %p\n", file->of_device);
204 if ((file->of_device == PROM_INVALID_HANDLE) || (file->of_device == 0))
206 DEBUG_LEAVE(FILE_ERR_BAD_FSYS);
207 return FILE_ERR_BAD_FSYS;
211 file->buffer = prom_claim_chunk((void *)LOAD_BUFFER_POS,
212 LOAD_BUFFER_SIZE, 0);
213 if (file->buffer == (void *)-1) {
214 prom_printf("Can't claim memory for TFTP download\n");
215 prom_close(file->of_device);
216 DEBUG_LEAVE(FILE_IOERR);
219 memset(file->buffer, 0, LOAD_BUFFER_SIZE);
223 file->len = prom_loadmethod(file->of_device, file->buffer);
225 DEBUG_F("result: %Ld\n", file->len);
227 DEBUG_LEAVE(FILE_ERR_OK);
232 of_read(struct boot_file_t* file, unsigned int size, void* buffer)
236 count = prom_read(file->of_device, buffer, size);
242 of_net_read(struct boot_file_t* file, unsigned int size, void* buffer)
244 unsigned int count, av;
246 av = file->len - file->pos;
247 count = size > av ? av : size;
248 memcpy(buffer, file->buffer + file->pos, count);
254 of_seek(struct boot_file_t* file, unsigned int newpos)
256 if (prom_seek(file->of_device, newpos)) {
261 return FILE_CANT_SEEK;
265 of_net_seek(struct boot_file_t* file, unsigned int newpos)
267 file->pos = (newpos > file->len) ? file->len : newpos;
272 of_close(struct boot_file_t* file)
276 DEBUG_F("<@%p>\n", file->of_device);
279 prom_release(file->buffer, LOAD_BUFFER_SIZE);
281 prom_close(file->of_device);
282 DEBUG_F("of_close called\n");
289 of_net_ino_size(struct boot_file_t* file)
296 * c-file-style: "k&r"