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_SIZE 0x1800000
49 static int of_open(struct boot_file_t* file,
50 struct partition_t* part, struct boot_fspec_t* fspec);
51 static int of_read(struct boot_file_t* file, unsigned int size, void* buffer);
52 static int of_seek(struct boot_file_t* file, unsigned int newpos);
53 static int of_close(struct boot_file_t* file);
56 static int of_net_open(struct boot_file_t* file,
57 struct partition_t* part, struct boot_fspec_t* fspec);
58 static int of_net_read(struct boot_file_t* file, unsigned int size, void* buffer);
59 static int of_net_seek(struct boot_file_t* file, unsigned int newpos);
60 static unsigned int of_net_ino_size(struct boot_file_t* file);
63 struct fs_t of_filesystem =
72 struct fs_t of_net_filesystem =
83 of_open(struct boot_file_t* file,
84 struct partition_t* part, struct boot_fspec_t* fspec)
86 static char buffer[1024];
93 strncpy(buffer, fspec->dev, 768);
96 if (part->sys_ind == LINUX_RAID || part->sys_ind == LINUX_NATIVE) {
97 DEBUG_F("skipping because partition is tagged %08x\n",
99 DEBUG_LEAVE(FILE_ERR_BAD_FSYS);
100 return FILE_ERR_BAD_FSYS;
103 sprintf(pn, "%02d", part->part_number);
106 if (fspec->file && strlen(fspec->file)) {
109 filename = strdup(fspec->file);
110 for (p = filename; *p; p++)
113 strcat(buffer, filename);
117 DEBUG_F("opening: \"%s\"\n", buffer);
119 file->of_device = prom_open(buffer);
121 DEBUG_F("file->of_device = %p\n", file->of_device);
125 if ((file->of_device == PROM_INVALID_HANDLE) || (file->of_device == 0))
127 DEBUG_LEAVE(FILE_ERR_BAD_FSYS);
128 return FILE_ERR_BAD_FSYS;
131 DEBUG_LEAVE(FILE_ERR_OK);
136 of_net_open(struct boot_file_t* file,
137 struct partition_t* part, struct boot_fspec_t* fspec)
139 static char buffer[1024];
140 char *filename = NULL;
147 if (fspec->file && strlen(fspec->file)) {
148 filename = strdup(fspec->file);
149 for (p = filename; *p; p++)
154 DEBUG_F("siaddr <%s>; filename <%s>; ciaddr <%s>; giaddr <%s>;"
156 fspec->siaddr, filename, fspec->ciaddr, fspec->giaddr,
159 strncpy(buffer, fspec->dev, 768);
160 /* If we didn't get a ':' include one */
161 if (fspec->dev[strlen(fspec->dev)-1] != ':')
164 /* If /packages/cas exists the we have a "new skool" tftp.
165 * This means that siaddr is the tftp server and that we can add
166 * {tftp,bootp}_retrys, subnet mask and tftp block size to the load
168 new_tftp = (prom_finddevice("/packages/cas") != PROM_INVALID_HANDLE);
169 DEBUG_F("Using %s tftp style\n", (new_tftp? "new": "old"));
172 strcat(buffer, fspec->siaddr);
175 if (fspec->is_ipv6 && (strstr(filename, "filename=") == NULL))
176 strcat(buffer, "filename=");
178 strcat(buffer, filename);
180 strcat(buffer, fspec->ciaddr);
182 strcat(buffer, fspec->giaddr);
184 strcat(buffer, fspec->bootp_retries);
186 strcat(buffer, fspec->tftp_retries);
188 strcat(buffer, fspec->subnetmask);
190 strcat(buffer, fspec->addl_params);
193 strcat(buffer, filename);
196 DEBUG_F("Opening: \"%s\"\n", buffer);
198 file->of_device = prom_open(buffer);
200 DEBUG_F("file->of_device = %p\n", file->of_device);
203 if ((file->of_device == PROM_INVALID_HANDLE) || (file->of_device == 0))
205 DEBUG_LEAVE(FILE_ERR_BAD_FSYS);
206 return FILE_ERR_BAD_FSYS;
210 file->buffer = prom_claim_chunk_top(LOAD_BUFFER_SIZE, 0);
211 if (file->buffer == (void *)-1) {
212 prom_printf("Can't claim memory for TFTP download\n");
213 prom_close(file->of_device);
214 DEBUG_LEAVE(FILE_IOERR);
217 memset(file->buffer, 0, LOAD_BUFFER_SIZE);
221 file->len = prom_loadmethod(file->of_device, file->buffer);
223 DEBUG_F("result: %Ld\n", file->len);
225 DEBUG_LEAVE(FILE_ERR_OK);
230 of_read(struct boot_file_t* file, unsigned int size, void* buffer)
234 count = prom_read(file->of_device, buffer, size);
240 of_net_read(struct boot_file_t* file, unsigned int size, void* buffer)
242 unsigned int count, av;
244 av = file->len - file->pos;
245 count = size > av ? av : size;
246 memcpy(buffer, file->buffer + file->pos, count);
252 of_seek(struct boot_file_t* file, unsigned int newpos)
254 if (prom_seek(file->of_device, newpos)) {
259 return FILE_CANT_SEEK;
263 of_net_seek(struct boot_file_t* file, unsigned int newpos)
265 file->pos = (newpos > file->len) ? file->len : newpos;
270 of_close(struct boot_file_t* file)
274 DEBUG_F("<@%p>\n", file->of_device);
277 prom_release(file->buffer, LOAD_BUFFER_SIZE);
279 prom_close(file->of_device);
280 DEBUG_F("of_close called\n");
287 of_net_ino_size(struct boot_file_t* file)
294 * c-file-style: "k&r"