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remoteproc: refactor rproc_elf_find_rsc_table()

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Refactor rproc_elf_find_rsc_table() and split out the scanning
for the section header named resource table. This is done to
prepare for loading firmware once.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-by: Ido Yariv <ido@wizery.com>
[small function name change to make the code easier to read]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
This commit is contained in:
Sjur Brændeland 2013-02-21 18:15:33 +01:00 committed by Ohad Ben-Cohen
parent f6161aa153
commit f665b2cd3f
1 changed files with 47 additions and 30 deletions
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77
drivers/remoteproc/remoteproc_elf_loader.c
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@ -208,41 +208,22 @@ rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
return ret;
}
/**
* rproc_elf_find_rsc_table() - find the resource table
* @rproc: the rproc handle
* @fw: the ELF firmware image
* @tablesz: place holder for providing back the table size
*
* This function finds the resource table inside the remote processor's
* firmware. It is used both upon the registration of @rproc (in order
* to look for and register the supported virito devices), and when the
* @rproc is booted.
*
* Returns the pointer to the resource table if it is found, and write its
* size into @tablesz. If a valid table isn't found, NULL is returned
* (and @tablesz isn't set).
*/
static struct resource_table *
rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
int *tablesz)
static struct elf32_shdr *
find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size)
{
struct elf32_hdr *ehdr;
struct elf32_shdr *shdr;
const char *name_table;
struct device *dev = &rproc->dev;
struct resource_table *table = NULL;
int i;
const u8 *elf_data = fw->data;
const char *name_table;
struct resource_table *table = NULL;
const u8 *elf_data = (void *)ehdr;
ehdr = (struct elf32_hdr *)elf_data;
/* look for the resource table and handle it */
shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff);
name_table = elf_data + shdr[ehdr->e_shstrndx].sh_offset;
/* look for the resource table and handle it */
for (i = 0; i < ehdr->e_shnum; i++, shdr++) {
int size = shdr->sh_size;
int offset = shdr->sh_offset;
u32 size = shdr->sh_size;
u32 offset = shdr->sh_offset;
if (strcmp(name_table + shdr->sh_name, ".resource_table"))
continue;
@ -250,7 +231,7 @@ rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
table = (struct resource_table *)(elf_data + offset);
/* make sure we have the entire table */
if (offset + size > fw->size) {
if (offset + size > fw_size || offset + size < size) {
dev_err(dev, "resource table truncated\n");
return NULL;
}
@ -280,10 +261,46 @@ rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
return NULL;
}
*tablesz = shdr->sh_size;
break;
return shdr;
}
return NULL;
}
/**
* rproc_elf_find_rsc_table() - find the resource table
* @rproc: the rproc handle
* @fw: the ELF firmware image
* @tablesz: place holder for providing back the table size
*
* This function finds the resource table inside the remote processor's
* firmware. It is used both upon the registration of @rproc (in order
* to look for and register the supported virito devices), and when the
* @rproc is booted.
*
* Returns the pointer to the resource table if it is found, and write its
* size into @tablesz. If a valid table isn't found, NULL is returned
* (and @tablesz isn't set).
*/
static struct resource_table *
rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
int *tablesz)
{
struct elf32_hdr *ehdr;
struct elf32_shdr *shdr;
struct device *dev = &rproc->dev;
struct resource_table *table = NULL;
const u8 *elf_data = fw->data;
ehdr = (struct elf32_hdr *)elf_data;
shdr = find_table(dev, ehdr, fw->size);
if (!shdr)
return NULL;
table = (struct resource_table *)(elf_data + shdr->sh_offset);
*tablesz = shdr->sh_size;
return table;
}