1 /* 2 * NVRAM definitions and access functions. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9 #ifndef _ASM_POWERPC_NVRAM_H 10 #define _ASM_POWERPC_NVRAM_H 11 12 13 #include <linux/errno.h> 14 #include <linux/list.h> 15 #include <uapi/asm/nvram.h> 16 17 #ifdef CONFIG_PPC_PSERIES 18 extern int nvram_write_error_log(char * buff, int length, 19 unsigned int err_type, unsigned int err_seq); 20 extern int nvram_read_error_log(char * buff, int length, 21 unsigned int * err_type, unsigned int *err_seq); 22 extern int nvram_clear_error_log(void); 23 extern int pSeries_nvram_init(void); 24 #endif /* CONFIG_PPC_PSERIES */ 25 26 #ifdef CONFIG_MMIO_NVRAM 27 extern int mmio_nvram_init(void); 28 #else 29 static inline int mmio_nvram_init(void) 30 { 31 return -ENODEV; 32 } 33 #endif 34 35 extern int __init nvram_scan_partitions(void); 36 extern loff_t nvram_create_partition(const char *name, int sig, 37 int req_size, int min_size); 38 extern int nvram_remove_partition(const char *name, int sig, 39 const char *exceptions[]); 40 extern int nvram_get_partition_size(loff_t data_index); 41 extern loff_t nvram_find_partition(const char *name, int sig, int *out_size); 42 43 /* Return partition offset in nvram */ 44 extern int pmac_get_partition(int partition); 45 46 /* Direct access to XPRAM on PowerMacs */ 47 extern u8 pmac_xpram_read(int xpaddr); 48 extern void pmac_xpram_write(int xpaddr, u8 data); 49 50 /* Synchronize NVRAM */ 51 extern void nvram_sync(void); 52 53 /* Determine NVRAM size */ 54 extern ssize_t nvram_get_size(void); 55 56 /* Normal access to NVRAM */ 57 extern unsigned char nvram_read_byte(int i); 58 extern void nvram_write_byte(unsigned char c, int i); 59 #endif /* _ASM_POWERPC_NVRAM_H */ 60