arch/powerpc/include/asm/nvram.h

   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 */