From 95f9578163bc25bcbf391420373cf797d5321830 Mon Sep 17 00:00:00 2001 From: Sjur Brændeland Date: Thu, 21 Feb 2013 18:15:34 +0100 Subject: remoteproc: add find_loaded_rsc_table firmware ops MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add function find_loaded_rsc_table to firmware ops. This function returns the location of the resource table in shared memory after loading. Signed-off-by: Sjur Brændeland Acked-by: Ido Yariv [align function name with existing terminology, update commit log] [document new function, rebase patch, small cleanups] Signed-off-by: Ohad Ben-Cohen --- drivers/remoteproc/remoteproc_elf_loader.c | 25 +++++++++++++++++++++++++ drivers/remoteproc/remoteproc_internal.h | 15 ++++++++++++++- 2 files changed, 39 insertions(+), 1 deletion(-) (limited to 'drivers/remoteproc') diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c index 774e5f768bf..ce283a5b42a 100644 --- a/drivers/remoteproc/remoteproc_elf_loader.c +++ b/drivers/remoteproc/remoteproc_elf_loader.c @@ -304,9 +304,34 @@ rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw, return table; } +/** + * rproc_elf_find_loaded_rsc_table() - find the loaded resource table + * @rproc: the rproc handle + * @fw: the ELF firmware image + * + * This function finds the location of the loaded resource table. Don't + * call this function if the table wasn't loaded yet - it's a bug if you do. + * + * Returns the pointer to the resource table if it is found or NULL otherwise. + * If the table wasn't loaded yet the result is unspecified. + */ +static struct resource_table * +rproc_elf_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw) +{ + struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; + struct elf32_shdr *shdr; + + shdr = find_table(&rproc->dev, ehdr, fw->size); + if (!shdr) + return NULL; + + return rproc_da_to_va(rproc, shdr->sh_addr, shdr->sh_size); +} + const struct rproc_fw_ops rproc_elf_fw_ops = { .load = rproc_elf_load_segments, .find_rsc_table = rproc_elf_find_rsc_table, + .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table, .sanity_check = rproc_elf_sanity_check, .get_boot_addr = rproc_elf_get_boot_addr }; diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h index 7bb66482d06..157e762c157 100644 --- a/drivers/remoteproc/remoteproc_internal.h +++ b/drivers/remoteproc/remoteproc_internal.h @@ -27,7 +27,8 @@ struct rproc; /** * struct rproc_fw_ops - firmware format specific operations. - * @find_rsc_table: finds the resource table inside the firmware image + * @find_rsc_table: find the resource table inside the firmware image + * @find_loaded_rsc_table: find the loaded resouce table * @load: load firmeware to memory, where the remote processor * expects to find it * @sanity_check: sanity check the fw image @@ -37,6 +38,8 @@ struct rproc_fw_ops { struct resource_table *(*find_rsc_table) (struct rproc *rproc, const struct firmware *fw, int *tablesz); + struct resource_table *(*find_loaded_rsc_table)(struct rproc *rproc, + const struct firmware *fw); int (*load)(struct rproc *rproc, const struct firmware *fw); int (*sanity_check)(struct rproc *rproc, const struct firmware *fw); u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); @@ -102,6 +105,16 @@ struct resource_table *rproc_find_rsc_table(struct rproc *rproc, return NULL; } +static inline +struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc, + const struct firmware *fw) +{ + if (rproc->fw_ops->find_loaded_rsc_table) + return rproc->fw_ops->find_loaded_rsc_table(rproc, fw); + + return NULL; +} + extern const struct rproc_fw_ops rproc_elf_fw_ops; #endif /* REMOTEPROC_INTERNAL_H */ -- cgit v1.2.3-18-g5258