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94 lines
2.8 KiB
94 lines
2.8 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* NVRAM definitions and access functions. |
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*/ |
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#ifndef _ASM_POWERPC_NVRAM_H |
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#define _ASM_POWERPC_NVRAM_H |
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#include <linux/types.h> |
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#include <linux/errno.h> |
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#include <linux/list.h> |
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#include <uapi/asm/nvram.h> |
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/* |
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* Set oops header version to distinguish between old and new format header. |
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* lnx,oops-log partition max size is 4000, header version > 4000 will |
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* help in identifying new header. |
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*/ |
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#define OOPS_HDR_VERSION 5000 |
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struct err_log_info { |
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__be32 error_type; |
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__be32 seq_num; |
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}; |
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struct nvram_os_partition { |
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const char *name; |
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int req_size; /* desired size, in bytes */ |
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int min_size; /* minimum acceptable size (0 means req_size) */ |
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long size; /* size of data portion (excluding err_log_info) */ |
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long index; /* offset of data portion of partition */ |
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bool os_partition; /* partition initialized by OS, not FW */ |
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}; |
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struct oops_log_info { |
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__be16 version; |
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__be16 report_length; |
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__be64 timestamp; |
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} __attribute__((packed)); |
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extern struct nvram_os_partition oops_log_partition; |
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#ifdef CONFIG_PPC_PSERIES |
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extern struct nvram_os_partition rtas_log_partition; |
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extern int nvram_write_error_log(char * buff, int length, |
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unsigned int err_type, unsigned int err_seq); |
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extern int nvram_read_error_log(char * buff, int length, |
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unsigned int * err_type, unsigned int *err_seq); |
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extern int nvram_clear_error_log(void); |
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extern int pSeries_nvram_init(void); |
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#endif /* CONFIG_PPC_PSERIES */ |
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#ifdef CONFIG_MMIO_NVRAM |
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extern int mmio_nvram_init(void); |
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#else |
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static inline int mmio_nvram_init(void) |
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{ |
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return -ENODEV; |
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} |
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#endif |
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extern int __init nvram_scan_partitions(void); |
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extern loff_t nvram_create_partition(const char *name, int sig, |
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int req_size, int min_size); |
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extern int nvram_remove_partition(const char *name, int sig, |
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const char *exceptions[]); |
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extern int nvram_get_partition_size(loff_t data_index); |
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extern loff_t nvram_find_partition(const char *name, int sig, int *out_size); |
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/* Return partition offset in nvram */ |
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extern int pmac_get_partition(int partition); |
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/* Direct access to XPRAM on PowerMacs */ |
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extern u8 pmac_xpram_read(int xpaddr); |
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extern void pmac_xpram_write(int xpaddr, u8 data); |
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/* Initialize NVRAM OS partition */ |
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extern int __init nvram_init_os_partition(struct nvram_os_partition *part); |
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/* Initialize NVRAM oops partition */ |
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extern void __init nvram_init_oops_partition(int rtas_partition_exists); |
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/* Read a NVRAM partition */ |
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extern int nvram_read_partition(struct nvram_os_partition *part, char *buff, |
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int length, unsigned int *err_type, |
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unsigned int *error_log_cnt); |
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/* Write to NVRAM OS partition */ |
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extern int nvram_write_os_partition(struct nvram_os_partition *part, |
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char *buff, int length, |
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unsigned int err_type, |
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unsigned int error_log_cnt); |
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#endif /* _ASM_POWERPC_NVRAM_H */
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