2 * Qualcomm Peripheral Image Loader
4 * Copyright (C) 2016 Linaro Ltd
5 * Copyright (C) 2015 Sony Mobile Communications Inc
6 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #include <linux/elf.h>
19 #include <linux/firmware.h>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/remoteproc.h>
23 #include <linux/sizes.h>
24 #include <linux/slab.h>
26 #include "remoteproc_internal.h"
27 #include "qcom_mdt_loader.h"
30 * qcom_mdt_parse() - extract useful parameters from the mdt header
31 * @fw: firmware handle
32 * @fw_addr: optional reference for base of the firmware's memory region
33 * @fw_size: optional reference for size of the firmware's memory region
34 * @fw_relocate: optional reference for flagging if the firmware is relocatable
36 * Returns 0 on success, negative errno otherwise.
38 int qcom_mdt_parse(const struct firmware *fw, phys_addr_t *fw_addr,
39 size_t *fw_size, bool *fw_relocate)
41 const struct elf32_phdr *phdrs;
42 const struct elf32_phdr *phdr;
43 const struct elf32_hdr *ehdr;
44 phys_addr_t min_addr = (phys_addr_t)ULLONG_MAX;
45 phys_addr_t max_addr = 0;
46 bool relocate = false;
49 ehdr = (struct elf32_hdr *)fw->data;
50 phdrs = (struct elf32_phdr *)(ehdr + 1);
52 for (i = 0; i < ehdr->e_phnum; i++) {
55 if (phdr->p_type != PT_LOAD)
58 if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
64 if (phdr->p_flags & QCOM_MDT_RELOCATABLE)
67 if (phdr->p_paddr < min_addr)
68 min_addr = phdr->p_paddr;
70 if (phdr->p_paddr + phdr->p_memsz > max_addr)
71 max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
77 *fw_size = max_addr - min_addr;
79 *fw_relocate = relocate;
83 EXPORT_SYMBOL_GPL(qcom_mdt_parse);
86 * qcom_mdt_load() - load the firmware which header is defined in fw
87 * @rproc: rproc handle
88 * @fw: frimware object for the header
89 * @firmware: filename of the firmware, for building .bXX names
91 * Returns 0 on success, negative errno otherwise.
93 int qcom_mdt_load(struct rproc *rproc,
94 const struct firmware *fw,
97 const struct elf32_phdr *phdrs;
98 const struct elf32_phdr *phdr;
99 const struct elf32_hdr *ehdr;
100 const struct firmware *seg_fw;
107 ehdr = (struct elf32_hdr *)fw->data;
108 phdrs = (struct elf32_phdr *)(ehdr + 1);
110 fw_name_len = strlen(firmware);
111 if (fw_name_len <= 4)
114 fw_name = kstrdup(firmware, GFP_KERNEL);
118 for (i = 0; i < ehdr->e_phnum; i++) {
121 if (phdr->p_type != PT_LOAD)
124 if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
130 ptr = rproc_da_to_va(rproc, phdr->p_paddr, phdr->p_memsz);
132 dev_err(&rproc->dev, "segment outside memory range\n");
137 if (phdr->p_filesz) {
138 sprintf(fw_name + fw_name_len - 3, "b%02d", i);
139 ret = request_firmware(&seg_fw, fw_name, &rproc->dev);
141 dev_err(&rproc->dev, "failed to load %s\n",
146 memcpy(ptr, seg_fw->data, seg_fw->size);
148 release_firmware(seg_fw);
151 if (phdr->p_memsz > phdr->p_filesz)
152 memset(ptr + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
159 EXPORT_SYMBOL_GPL(qcom_mdt_load);
161 MODULE_DESCRIPTION("Firmware parser for Qualcomm MDT format");
162 MODULE_LICENSE("GPL v2");