diff options
author | Sjur Brændeland <sjur.brandeland@stericsson.com> | 2012-07-15 08:25:27 (GMT) |
---|---|---|
committer | Ohad Ben-Cohen <ohad@wizery.com> | 2012-07-15 08:25:27 (GMT) |
commit | 72854fb042b15b6139031a59c4725b3d86708352 (patch) | |
tree | fc2c5271ad363024481ae905334db308b4fe4ab5 /drivers/remoteproc/remoteproc_core.c | |
parent | 3e5f9eb5d91e430ca908a61615f9a89c189a0d4e (diff) | |
download | linux-72854fb042b15b6139031a59c4725b3d86708352.tar.xz |
remoteproc: Move Elf related functions to separate file
Prepare for introduction of custom firmware loaders by
moving all ELF related handling into a separate file.
The functions: rproc_find_rsc_table(), rproc_fw_sanity_check(),
rproc_find_rsc_table() and rproc_get_boot_addr() are moved
to the new file remoteproc_elf_loader.c. The function
rproc_da_to_va() is made non-static and is declared in
remoteproc_internal.h
No functional changes are introduced in this patch.
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
[ohad: rebase, fix kerneldoc, put prototypes in remoteproc_internal.h]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Diffstat (limited to 'drivers/remoteproc/remoteproc_core.c')
-rw-r--r-- | drivers/remoteproc/remoteproc_core.c | 249 |
1 files changed, 1 insertions, 248 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 3173e21..c68b3bb5 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -149,7 +149,7 @@ static void rproc_disable_iommu(struct rproc *rproc) * but only on kernel direct mapped RAM memory. Instead, we're just using * here the output of the DMA API, which should be more correct. */ -static void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) +void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) { struct rproc_mem_entry *carveout; void *ptr = NULL; @@ -173,96 +173,6 @@ static void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) return ptr; } -/** - * rproc_load_segments() - load firmware segments to memory - * @rproc: remote processor which will be booted using these fw segments - * @fw: the ELF firmware image - * - * This function loads the firmware segments to memory, where the remote - * processor expects them. - * - * Some remote processors will expect their code and data to be placed - * in specific device addresses, and can't have them dynamically assigned. - * - * We currently support only those kind of remote processors, and expect - * the program header's paddr member to contain those addresses. We then go - * through the physically contiguous "carveout" memory regions which we - * allocated (and mapped) earlier on behalf of the remote processor, - * and "translate" device address to kernel addresses, so we can copy the - * segments where they are expected. - * - * Currently we only support remote processors that required carveout - * allocations and got them mapped onto their iommus. Some processors - * might be different: they might not have iommus, and would prefer to - * directly allocate memory for every segment/resource. This is not yet - * supported, though. - */ -static int -rproc_load_segments(struct rproc *rproc, const struct firmware *fw) -{ - struct device *dev = &rproc->dev; - struct elf32_hdr *ehdr; - struct elf32_phdr *phdr; - int i, ret = 0; - const u8 *elf_data = fw->data; - - ehdr = (struct elf32_hdr *)elf_data; - phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff); - - /* go through the available ELF segments */ - for (i = 0; i < ehdr->e_phnum; i++, phdr++) { - u32 da = phdr->p_paddr; - u32 memsz = phdr->p_memsz; - u32 filesz = phdr->p_filesz; - u32 offset = phdr->p_offset; - void *ptr; - - if (phdr->p_type != PT_LOAD) - continue; - - dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n", - phdr->p_type, da, memsz, filesz); - - if (filesz > memsz) { - dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n", - filesz, memsz); - ret = -EINVAL; - break; - } - - if (offset + filesz > fw->size) { - dev_err(dev, "truncated fw: need 0x%x avail 0x%x\n", - offset + filesz, fw->size); - ret = -EINVAL; - break; - } - - /* grab the kernel address for this device address */ - ptr = rproc_da_to_va(rproc, da, memsz); - if (!ptr) { - dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz); - ret = -EINVAL; - break; - } - - /* put the segment where the remote processor expects it */ - if (phdr->p_filesz) - memcpy(ptr, elf_data + phdr->p_offset, filesz); - - /* - * Zero out remaining memory for this segment. - * - * This isn't strictly required since dma_alloc_coherent already - * did this for us. albeit harmless, we may consider removing - * this. - */ - if (memsz > filesz) - memset(ptr + filesz, 0, memsz - filesz); - } - - return ret; -} - int rproc_alloc_vring(struct rproc_vdev *rvdev, int i) { struct rproc *rproc = rvdev->rproc; @@ -817,85 +727,6 @@ rproc_handle_virtio_rsc(struct rproc *rproc, struct resource_table *table, int l } /** - * rproc_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_find_rsc_table(struct rproc *rproc, const struct firmware *fw, - int *tablesz) -{ - 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; - - ehdr = (struct elf32_hdr *)elf_data; - 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; - - if (strcmp(name_table + shdr->sh_name, ".resource_table")) - continue; - - table = (struct resource_table *)(elf_data + offset); - - /* make sure we have the entire table */ - if (offset + size > fw->size) { - dev_err(dev, "resource table truncated\n"); - return NULL; - } - - /* make sure table has at least the header */ - if (sizeof(struct resource_table) > size) { - dev_err(dev, "header-less resource table\n"); - return NULL; - } - - /* we don't support any version beyond the first */ - if (table->ver != 1) { - dev_err(dev, "unsupported fw ver: %d\n", table->ver); - return NULL; - } - - /* make sure reserved bytes are zeroes */ - if (table->reserved[0] || table->reserved[1]) { - dev_err(dev, "non zero reserved bytes\n"); - return NULL; - } - - /* make sure the offsets array isn't truncated */ - if (table->num * sizeof(table->offset[0]) + - sizeof(struct resource_table) > size) { - dev_err(dev, "resource table incomplete\n"); - return NULL; - } - - *tablesz = shdr->sh_size; - break; - } - - return table; -} - -/** * rproc_resource_cleanup() - clean up and free all acquired resources * @rproc: rproc handle * @@ -938,84 +769,6 @@ static void rproc_resource_cleanup(struct rproc *rproc) } } -/* make sure this fw image is sane */ -static int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw) -{ - const char *name = rproc->firmware; - struct device *dev = &rproc->dev; - struct elf32_hdr *ehdr; - char class; - - if (!fw) { - dev_err(dev, "failed to load %s\n", name); - return -EINVAL; - } - - if (fw->size < sizeof(struct elf32_hdr)) { - dev_err(dev, "Image is too small\n"); - return -EINVAL; - } - - ehdr = (struct elf32_hdr *)fw->data; - - /* We only support ELF32 at this point */ - class = ehdr->e_ident[EI_CLASS]; - if (class != ELFCLASS32) { - dev_err(dev, "Unsupported class: %d\n", class); - return -EINVAL; - } - - /* We assume the firmware has the same endianess as the host */ -# ifdef __LITTLE_ENDIAN - if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) { -# else /* BIG ENDIAN */ - if (ehdr->e_ident[EI_DATA] != ELFDATA2MSB) { -# endif - dev_err(dev, "Unsupported firmware endianess\n"); - return -EINVAL; - } - - if (fw->size < ehdr->e_shoff + sizeof(struct elf32_shdr)) { - dev_err(dev, "Image is too small\n"); - return -EINVAL; - } - - if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { - dev_err(dev, "Image is corrupted (bad magic)\n"); - return -EINVAL; - } - - if (ehdr->e_phnum == 0) { - dev_err(dev, "No loadable segments\n"); - return -EINVAL; - } - - if (ehdr->e_phoff > fw->size) { - dev_err(dev, "Firmware size is too small\n"); - return -EINVAL; - } - - return 0; -} - -/** - * rproc_get_boot_addr() - Get rproc's boot address. - * @rproc: the remote processor handle - * @fw: the ELF firmware image - * - * This function returns the entry point address of the ELF - * image. - * - * Note that the boot address is not a configurable property of all remote - * processors. Some will always boot at a specific hard-coded address. - */ -u32 rproc_get_boot_addr(struct rproc *rproc, const struct firmware *fw) -{ - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; - - return ehdr->e_entry; -} - /* * take a firmware and boot a remote processor with it. */ |