mirror of https://gitee.com/openkylin/linux.git
99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
/*
|
|
* NVRAM definitions and access functions.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#ifndef _ASM_POWERPC_NVRAM_H
|
|
#define _ASM_POWERPC_NVRAM_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/list.h>
|
|
#include <uapi/asm/nvram.h>
|
|
|
|
/*
|
|
* Set oops header version to distinguish between old and new format header.
|
|
* lnx,oops-log partition max size is 4000, header version > 4000 will
|
|
* help in identifying new header.
|
|
*/
|
|
#define OOPS_HDR_VERSION 5000
|
|
|
|
struct err_log_info {
|
|
__be32 error_type;
|
|
__be32 seq_num;
|
|
};
|
|
|
|
struct nvram_os_partition {
|
|
const char *name;
|
|
int req_size; /* desired size, in bytes */
|
|
int min_size; /* minimum acceptable size (0 means req_size) */
|
|
long size; /* size of data portion (excluding err_log_info) */
|
|
long index; /* offset of data portion of partition */
|
|
bool os_partition; /* partition initialized by OS, not FW */
|
|
};
|
|
|
|
struct oops_log_info {
|
|
__be16 version;
|
|
__be16 report_length;
|
|
__be64 timestamp;
|
|
} __attribute__((packed));
|
|
|
|
extern struct nvram_os_partition oops_log_partition;
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
extern struct nvram_os_partition rtas_log_partition;
|
|
|
|
extern int nvram_write_error_log(char * buff, int length,
|
|
unsigned int err_type, unsigned int err_seq);
|
|
extern int nvram_read_error_log(char * buff, int length,
|
|
unsigned int * err_type, unsigned int *err_seq);
|
|
extern int nvram_clear_error_log(void);
|
|
extern int pSeries_nvram_init(void);
|
|
#endif /* CONFIG_PPC_PSERIES */
|
|
|
|
#ifdef CONFIG_MMIO_NVRAM
|
|
extern int mmio_nvram_init(void);
|
|
#else
|
|
static inline int mmio_nvram_init(void)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
extern int __init nvram_scan_partitions(void);
|
|
extern loff_t nvram_create_partition(const char *name, int sig,
|
|
int req_size, int min_size);
|
|
extern int nvram_remove_partition(const char *name, int sig,
|
|
const char *exceptions[]);
|
|
extern int nvram_get_partition_size(loff_t data_index);
|
|
extern loff_t nvram_find_partition(const char *name, int sig, int *out_size);
|
|
|
|
/* Return partition offset in nvram */
|
|
extern int pmac_get_partition(int partition);
|
|
|
|
/* Direct access to XPRAM on PowerMacs */
|
|
extern u8 pmac_xpram_read(int xpaddr);
|
|
extern void pmac_xpram_write(int xpaddr, u8 data);
|
|
|
|
/* Initialize NVRAM OS partition */
|
|
extern int __init nvram_init_os_partition(struct nvram_os_partition *part);
|
|
|
|
/* Initialize NVRAM oops partition */
|
|
extern void __init nvram_init_oops_partition(int rtas_partition_exists);
|
|
|
|
/* Read a NVRAM partition */
|
|
extern int nvram_read_partition(struct nvram_os_partition *part, char *buff,
|
|
int length, unsigned int *err_type,
|
|
unsigned int *error_log_cnt);
|
|
|
|
/* Write to NVRAM OS partition */
|
|
extern int nvram_write_os_partition(struct nvram_os_partition *part,
|
|
char *buff, int length,
|
|
unsigned int err_type,
|
|
unsigned int error_log_cnt);
|
|
|
|
#endif /* _ASM_POWERPC_NVRAM_H */
|