| /* |
| * Copyright (C) 2011 Google, Inc. |
| * |
| * This software is licensed under the terms of the GNU General Public |
| * License version 2, as published by the Free Software Foundation, and |
| * may be copied, distributed, and modified under those terms. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| #ifndef __LINUX_PERSISTENT_RAM_H__ |
| #define __LINUX_PERSISTENT_RAM_H__ |
| |
| #include <linux/device.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/types.h> |
| |
| struct persistent_ram_buffer; |
| |
| struct persistent_ram_descriptor { |
| const char *name; |
| phys_addr_t size; |
| }; |
| |
| struct persistent_ram { |
| phys_addr_t start; |
| phys_addr_t size; |
| |
| int num_descs; |
| struct persistent_ram_descriptor *descs; |
| |
| struct list_head node; |
| }; |
| |
| struct persistent_ram_zone { |
| struct list_head node; |
| void *vaddr; |
| struct persistent_ram_buffer *buffer; |
| size_t buffer_size; |
| |
| /* ECC correction */ |
| bool ecc; |
| char *par_buffer; |
| char *par_header; |
| struct rs_control *rs_decoder; |
| int corrected_bytes; |
| int bad_blocks; |
| int ecc_block_size; |
| int ecc_size; |
| int ecc_symsize; |
| int ecc_poly; |
| |
| char *old_log; |
| size_t old_log_size; |
| size_t old_log_footer_size; |
| bool early; |
| }; |
| |
| int persistent_ram_early_init(struct persistent_ram *ram); |
| |
| struct persistent_ram_zone *persistent_ram_init_ringbuffer(struct device *dev, |
| bool ecc); |
| |
| int persistent_ram_write(struct persistent_ram_zone *prz, const void *s, |
| unsigned int count); |
| |
| size_t persistent_ram_old_size(struct persistent_ram_zone *prz); |
| void *persistent_ram_old(struct persistent_ram_zone *prz); |
| void persistent_ram_free_old(struct persistent_ram_zone *prz); |
| ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz, |
| char *str, size_t len); |
| |
| #endif |