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powerpc/nvram: Move generic code for nvram and pstore

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With minor checks, we can move most of the code for nvram
under pseries to a common place to be re-used by other
powerpc platforms like powernv. This patch moves such
common code to arch/powerpc/kernel/nvram_64.c file.

Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
[mpe: Move select of ZLIB_DEFLATE to PPC64 to fix the build]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Hari Bathini
2015-02-06 01:06:04 +05:30
committed by Michael Ellerman
parent 3af229f207
commit 78989f0a55
6 changed files with 715 additions and 663 deletions
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50
arch/powerpc/include/asm/nvram.h
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@@ -9,12 +9,43 @@
#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,
@@ -50,6 +81,23 @@ extern void pmac_xpram_write(int xpaddr, u8 data);
/* Synchronize NVRAM */
extern void nvram_sync(void);
/* 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);
/* Determine NVRAM size */
extern ssize_t nvram_get_size(void);