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);
63 struct fs_t of_filesystem =
72 struct fs_t of_net_filesystem =
82 of_open(struct boot_file_t* file,
83 struct partition_t* part, struct boot_fspec_t* fspec)
85 static char buffer[1024];
92 strncpy(buffer, fspec->dev, 768);
95 if (part->sys_ind == LINUX_RAID) {
96 DEBUG_F("skipping because partition is marked LINUX_RAID\n");
97 DEBUG_LEAVE(FILE_ERR_BAD_FSYS);
98 return FILE_ERR_BAD_FSYS;
101 sprintf(pn, "%02d", part->part_number);
104 if (fspec->file && strlen(fspec->file)) {
107 filename = strdup(fspec->file);
108 for (p = filename; *p; p++)
111 strcat(buffer, filename);
115 DEBUG_F("opening: \"%s\"\n", buffer);
117 file->of_device = prom_open(buffer);
119 DEBUG_F("file->of_device = %p\n", file->of_device);
123 if ((file->of_device == PROM_INVALID_HANDLE) || (file->of_device == 0))
125 DEBUG_LEAVE(FILE_ERR_BAD_FSYS);
126 return FILE_ERR_BAD_FSYS;
129 DEBUG_LEAVE(FILE_ERR_OK);
134 of_net_open(struct boot_file_t* file,
135 struct partition_t* part, struct boot_fspec_t* fspec)
137 static char buffer[1024];
138 char *filename = NULL;
145 if (fspec->file && strlen(fspec->file)) {
146 filename = strdup(fspec->file);
147 for (p = filename; *p; p++)
152 DEBUG_F("siaddr <%s>; filename <%s>; ciaddr <%s>; giaddr <%s>;"
154 fspec->siaddr, filename, fspec->ciaddr, fspec->giaddr,
157 strncpy(buffer, fspec->dev, 768);
158 /* If we didn't get a ':' include one */
159 if (fspec->dev[strlen(fspec->dev)-1] != ':')
162 /* If /packages/cas exists the we have a "new skool" tftp.
163 * This means that siaddr is the tftp server and that we can add
164 * {tftp,bootp}_retrys, subnet mask and tftp block size to the load
166 new_tftp = (prom_finddevice("/packages/cas") != PROM_INVALID_HANDLE);
167 DEBUG_F("Using %s tftp style\n", (new_tftp? "new": "old"));
170 strcat(buffer, fspec->siaddr);
173 if (fspec->is_ipv6 && (strstr(filename, "filename=") == NULL))
174 strcat(buffer, "filename=");
176 strcat(buffer, filename);
178 strcat(buffer, fspec->ciaddr);
180 strcat(buffer, fspec->giaddr);
182 strcat(buffer, fspec->bootp_retries);
184 strcat(buffer, fspec->tftp_retries);
186 strcat(buffer, fspec->subnetmask);
188 strcat(buffer, fspec->addl_params);
191 strcat(buffer, filename);
194 DEBUG_F("Opening: \"%s\"\n", buffer);
196 file->of_device = prom_open(buffer);
198 DEBUG_F("file->of_device = %p\n", file->of_device);
201 if ((file->of_device == PROM_INVALID_HANDLE) || (file->of_device == 0))
203 DEBUG_LEAVE(FILE_ERR_BAD_FSYS);
204 return FILE_ERR_BAD_FSYS;
208 file->buffer = prom_claim_chunk((void *)LOAD_BUFFER_POS,
209 LOAD_BUFFER_SIZE, 0);
210 if (file->buffer == (void *)-1) {
211 prom_printf("Can't claim memory for TFTP download\n");
212 prom_close(file->of_device);
213 DEBUG_LEAVE(FILE_IOERR);
216 memset(file->buffer, 0, LOAD_BUFFER_SIZE);
220 file->len = prom_loadmethod(file->of_device, file->buffer);
222 DEBUG_F("result: %Ld\n", file->len);
224 DEBUG_LEAVE(FILE_ERR_OK);
229 of_read(struct boot_file_t* file, unsigned int size, void* buffer)
233 count = prom_read(file->of_device, buffer, size);
239 of_net_read(struct boot_file_t* file, unsigned int size, void* buffer)
241 unsigned int count, av;
243 av = file->len - file->pos;
244 count = size > av ? av : size;
245 memcpy(buffer, file->buffer + file->pos, count);
251 of_seek(struct boot_file_t* file, unsigned int newpos)
253 if (prom_seek(file->of_device, newpos)) {
258 return FILE_CANT_SEEK;
262 of_net_seek(struct boot_file_t* file, unsigned int newpos)
264 file->pos = (newpos > file->len) ? file->len : newpos;
269 of_close(struct boot_file_t* file)
273 DEBUG_F("<@%p>\n", file->of_device);
276 prom_release(file->buffer, LOAD_BUFFER_SIZE);
278 prom_close(file->of_device);
279 DEBUG_F("of_close called\n");
287 * c-file-style: "k&r"