/*
- * $Id: cmdlinepart.c,v 1.18 2005/06/07 15:04:26 joern Exp $
+ * $Id: cmdlinepart.c,v 1.19 2005/11/07 11:14:19 gleixner Exp $
*
* Read flash partition table from command line
*
* Copyright 2002 SYSGO Real-Time Solutions GmbH
*
* The format for the command line is as follows:
- *
+ *
* mtdparts=<mtddef>[;<mtddef]
* <mtddef> := <mtd-id>:<partdef>[,<partdef>]
* <partdef> := <size>[@offset][<name>][ro]
* <mtd-id> := unique name used in mapping driver/device (mtd->name)
* <size> := standard linux memsize OR "-" to denote all remaining space
* <name> := '(' NAME ')'
- *
+ *
* Examples:
- *
+ *
* 1 NOR Flash, with 1 single writable partition:
* edb7312-nor:-
- *
+ *
* 1 NOR Flash with 2 partitions, 1 NAND with one
* edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home)
*/
/* special size referring to all the remaining space in a partition */
-#define SIZE_REMAINING 0xffffffff
+#define SIZE_REMAINING UINT_MAX
+#define OFFSET_CONTINUOUS UINT_MAX
struct cmdline_mtd_partition {
struct cmdline_mtd_partition *next;
/*
* Parse one partition definition for an MTD. Since there can be many
- * comma separated partition definitions, this function calls itself
+ * comma separated partition definitions, this function calls itself
* recursively until no more partition definitions are found. Nice side
* effect: the memory to keep the mtd_partition structs and the names
* is allocated upon the last definition being found. At that point the
* syntax has been verified ok.
*/
-static struct mtd_partition * newpart(char *s,
+static struct mtd_partition * newpart(char *s,
char **retptr,
int *num_parts,
- int this_part,
- unsigned char **extra_mem_ptr,
+ int this_part,
+ unsigned char **extra_mem_ptr,
int extra_mem_size)
{
struct mtd_partition *parts;
unsigned long size;
- unsigned long offset = 0;
+ unsigned long offset = OFFSET_CONTINUOUS;
char *name;
int name_len;
unsigned char *extra_mem;
mask_flags = 0; /* this is going to be a regular partition */
delim = 0;
/* check for offset */
- if (*s == '@')
+ if (*s == '@')
{
s++;
offset = memparse(s, &s);
{
delim = ')';
}
-
+
if (delim)
{
char *p;
name = NULL;
name_len = 13; /* Partition_000 */
}
-
+
/* record name length for memory allocation later */
extra_mem_size += name_len + 1;
/* test for options */
- if (strncmp(s, "ro", 2) == 0)
+ if (strncmp(s, "ro", 2) == 0)
{
mask_flags |= MTD_WRITEABLE;
s += 2;
return NULL;
}
/* more partitions follow, parse them */
- if ((parts = newpart(s + 1, &s, num_parts,
+ if ((parts = newpart(s + 1, &s, num_parts,
this_part + 1, &extra_mem, extra_mem_size)) == 0)
return NULL;
}
*num_parts = this_part + 1;
alloc_size = *num_parts * sizeof(struct mtd_partition) +
extra_mem_size;
- parts = kmalloc(alloc_size, GFP_KERNEL);
+ parts = kzalloc(alloc_size, GFP_KERNEL);
if (!parts)
{
printk(KERN_ERR ERRP "out of memory\n");
return NULL;
}
- memset(parts, 0, alloc_size);
extra_mem = (unsigned char *)(parts + *num_parts);
}
/* enter this partition (offset will be calculated later if it is zero at this point) */
extra_mem += name_len + 1;
dbg(("partition %d: name <%s>, offset %x, size %x, mask flags %x\n",
- this_part,
+ this_part,
parts[this_part].name,
parts[this_part].offset,
parts[this_part].size,
return parts;
}
-/*
- * Parse the command line.
+/*
+ * Parse the command line.
*/
static int mtdpart_setup_real(char *s)
{
dbg(("parsing <%s>\n", p+1));
- /*
+ /*
* parse one mtd. have it reserve memory for the
* struct cmdline_mtd_partition and the mtd-id string.
*/
&num_parts, /* out: number of parts */
0, /* first partition */
(unsigned char**)&this_mtd, /* out: extra mem */
- mtd_id_len + 1 + sizeof(*this_mtd) +
+ mtd_id_len + 1 + sizeof(*this_mtd) +
sizeof(void*)-1 /*alignment*/);
if(!parts)
{
}
/* align this_mtd */
- this_mtd = (struct cmdline_mtd_partition *)
+ this_mtd = (struct cmdline_mtd_partition *)
ALIGN((unsigned long)this_mtd, sizeof(void*));
- /* enter results */
+ /* enter results */
this_mtd->parts = parts;
this_mtd->num_parts = num_parts;
this_mtd->mtd_id = (char*)(this_mtd + 1);
strlcpy(this_mtd->mtd_id, mtd_id, mtd_id_len + 1);
/* link into chain */
- this_mtd->next = partitions;
+ this_mtd->next = partitions;
partitions = this_mtd;
- dbg(("mtdid=<%s> num_parts=<%d>\n",
+ dbg(("mtdid=<%s> num_parts=<%d>\n",
this_mtd->mtd_id, this_mtd->num_parts));
-
+
/* EOS - we're done */
if (*s == 0)
* information. It returns partitions for the requested mtd device, or
* the first one in the chain if a NULL mtd_id is passed in.
*/
-static int parse_cmdline_partitions(struct mtd_info *master,
+static int parse_cmdline_partitions(struct mtd_info *master,
struct mtd_partition **pparts,
unsigned long origin)
{
{
for(i = 0, offset = 0; i < part->num_parts; i++)
{
- if (!part->parts[i].offset)
+ if (part->parts[i].offset == OFFSET_CONTINUOUS)
part->parts[i].offset = offset;
else
offset = part->parts[i].offset;
part->parts[i].size = master->size - offset;
if (offset + part->parts[i].size > master->size)
{
- printk(KERN_WARNING ERRP
+ printk(KERN_WARNING ERRP
"%s: partitioning exceeds flash size, truncating\n",
part->mtd_id);
part->parts[i].size = master->size - offset;
}
-/*
- * This is the handler for our kernel parameter, called from
+/*
+ * This is the handler for our kernel parameter, called from
* main.c::checksetup(). Note that we can not yet kmalloc() anything,
* so we only save the commandline for later processing.
*
* This function needs to be visible for bootloaders.
*/
-int mtdpart_setup(char *s)
+static int mtdpart_setup(char *s)
{
cmdline = s;
return 1;
git.openpandora.org / pandora-kernel.git / blobdiff