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/device.h> 21 #include <linux/kernel.h> 22 #include <linux/list.h> 23 #include <linux/types.h> 24 #include <linux/init.h> 25 26 struct persistent_ram_buffer; 27 struct rs_control; 28 29 struct persistent_ram_zone { 30 phys_addr_t paddr; 31 size_t size; 32 void *vaddr; 33 struct persistent_ram_buffer *buffer; 34 size_t buffer_size; 35 36 /* ECC correction */ 37 char *par_buffer; 38 char *par_header; 39 struct rs_control *rs_decoder; 40 int corrected_bytes; 41 int bad_blocks; 42 int ecc_block_size; 43 int ecc_size; 44 45 char *old_log; 46 size_t old_log_size; 47 }; 48 49 struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, 50 size_t size, u32 sig, 51 int ecc_size); 52 void persistent_ram_free(struct persistent_ram_zone *prz); 53 void persistent_ram_zap(struct persistent_ram_zone *prz); 54 55 int persistent_ram_write(struct persistent_ram_zone *prz, const void *s, 56 unsigned int count); 57 58 void persistent_ram_save_old(struct persistent_ram_zone *prz); 59 size_t persistent_ram_old_size(struct persistent_ram_zone *prz); 60 void *persistent_ram_old(struct persistent_ram_zone *prz); 61 void persistent_ram_free_old(struct persistent_ram_zone *prz); 62 ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz, 63 char *str, size_t len); 64 65 /* 66 * Ramoops platform data 67 * @mem_size memory size for ramoops 68 * @mem_address physical memory address to contain ramoops 69 */ 70 71 struct ramoops_platform_data { 72 unsigned long mem_size; 73 unsigned long mem_address; 74 unsigned long record_size; 75 unsigned long console_size; 76 unsigned long ftrace_size; 77 int dump_oops; 78 int ecc_size; 79 }; 80 81 #endif 82