1 /* 2 * Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com> 3 * Copyright (C) 2011 Kees Cook <keescook@chromium.org> 4 * Copyright (C) 2011 Google, Inc. 5 * 6 * This software is licensed under the terms of the GNU General Public 7 * License version 2, as published by the Free Software Foundation, and 8 * may be copied, distributed, and modified under those terms. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 */ 16 17 #ifndef __LINUX_PSTORE_RAM_H__ 18 #define __LINUX_PSTORE_RAM_H__ 19 20 #include <linux/compiler.h> 21 #include <linux/device.h> 22 #include <linux/init.h> 23 #include <linux/kernel.h> 24 #include <linux/list.h> 25 #include <linux/types.h> 26 27 struct persistent_ram_buffer; 28 struct rs_control; 29 30 struct persistent_ram_ecc_info { 31 int block_size; 32 int ecc_size; 33 int symsize; 34 int poly; 35 }; 36 37 struct persistent_ram_zone { 38 phys_addr_t paddr; 39 size_t size; 40 void *vaddr; 41 struct persistent_ram_buffer *buffer; 42 size_t buffer_size; 43 44 /* ECC correction */ 45 char *par_buffer; 46 char *par_header; 47 struct rs_control *rs_decoder; 48 int corrected_bytes; 49 int bad_blocks; 50 struct persistent_ram_ecc_info ecc_info; 51 52 char *old_log; 53 size_t old_log_size; 54 }; 55 56 struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size, 57 u32 sig, struct persistent_ram_ecc_info *ecc_info, 58 unsigned int memtype); 59 void persistent_ram_free(struct persistent_ram_zone *prz); 60 void persistent_ram_zap(struct persistent_ram_zone *prz); 61 62 int persistent_ram_write(struct persistent_ram_zone *prz, const void *s, 63 unsigned int count); 64 int persistent_ram_write_user(struct persistent_ram_zone *prz, 65 const void __user *s, unsigned int count); 66 67 void persistent_ram_save_old(struct persistent_ram_zone *prz); 68 size_t persistent_ram_old_size(struct persistent_ram_zone *prz); 69 void *persistent_ram_old(struct persistent_ram_zone *prz); 70 void persistent_ram_free_old(struct persistent_ram_zone *prz); 71 ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz, 72 char *str, size_t len); 73 74 /* 75 * Ramoops platform data 76 * @mem_size memory size for ramoops 77 * @mem_address physical memory address to contain ramoops 78 */ 79 80 struct ramoops_platform_data { 81 unsigned long mem_size; 82 phys_addr_t mem_address; 83 unsigned int mem_type; 84 unsigned long record_size; 85 unsigned long console_size; 86 unsigned long ftrace_size; 87 unsigned long pmsg_size; 88 int dump_oops; 89 struct persistent_ram_ecc_info ecc_info; 90 }; 91 92 #endif 93