cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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nvram.h (2834B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * NVRAM definitions and access functions.
      4 */
      5#ifndef _ASM_POWERPC_NVRAM_H
      6#define _ASM_POWERPC_NVRAM_H
      7
      8#include <linux/types.h>
      9#include <linux/errno.h>
     10#include <linux/list.h>
     11#include <uapi/asm/nvram.h>
     12
     13/*
     14 * Set oops header version to distinguish between old and new format header.
     15 * lnx,oops-log partition max size is 4000, header version > 4000 will
     16 * help in identifying new header.
     17 */
     18#define OOPS_HDR_VERSION 5000
     19
     20struct err_log_info {
     21	__be32 error_type;
     22	__be32 seq_num;
     23};
     24
     25struct nvram_os_partition {
     26	const char *name;
     27	int req_size;	/* desired size, in bytes */
     28	int min_size;	/* minimum acceptable size (0 means req_size) */
     29	long size;	/* size of data portion (excluding err_log_info) */
     30	long index;	/* offset of data portion of partition */
     31	bool os_partition; /* partition initialized by OS, not FW */
     32};
     33
     34struct oops_log_info {
     35	__be16 version;
     36	__be16 report_length;
     37	__be64 timestamp;
     38} __attribute__((packed));
     39
     40extern struct nvram_os_partition oops_log_partition;
     41
     42#ifdef CONFIG_PPC_PSERIES
     43extern struct nvram_os_partition rtas_log_partition;
     44
     45extern int nvram_write_error_log(char * buff, int length,
     46					 unsigned int err_type, unsigned int err_seq);
     47extern int nvram_read_error_log(char * buff, int length,
     48					 unsigned int * err_type, unsigned int *err_seq);
     49extern int nvram_clear_error_log(void);
     50extern int pSeries_nvram_init(void);
     51#endif /* CONFIG_PPC_PSERIES */
     52
     53#ifdef CONFIG_MMIO_NVRAM
     54extern int mmio_nvram_init(void);
     55#else
     56static inline int mmio_nvram_init(void)
     57{
     58	return -ENODEV;
     59}
     60#endif
     61
     62extern int __init nvram_scan_partitions(void);
     63extern loff_t nvram_create_partition(const char *name, int sig,
     64				     int req_size, int min_size);
     65extern int nvram_remove_partition(const char *name, int sig,
     66					const char *exceptions[]);
     67extern int nvram_get_partition_size(loff_t data_index);
     68extern loff_t nvram_find_partition(const char *name, int sig, int *out_size);
     69
     70/* Return partition offset in nvram */
     71extern int	pmac_get_partition(int partition);
     72
     73/* Direct access to XPRAM on PowerMacs */
     74extern u8	pmac_xpram_read(int xpaddr);
     75extern void	pmac_xpram_write(int xpaddr, u8 data);
     76
     77/* Initialize NVRAM OS partition */
     78extern int __init nvram_init_os_partition(struct nvram_os_partition *part);
     79
     80/* Initialize NVRAM oops partition */
     81extern void __init nvram_init_oops_partition(int rtas_partition_exists);
     82
     83/* Read a NVRAM partition */
     84extern int nvram_read_partition(struct nvram_os_partition *part, char *buff,
     85				int length, unsigned int *err_type,
     86				unsigned int *error_log_cnt);
     87
     88/* Write to NVRAM OS partition */
     89extern int nvram_write_os_partition(struct nvram_os_partition *part,
     90				    char *buff, int length,
     91				    unsigned int err_type,
     92				    unsigned int error_log_cnt);
     93
     94#endif /* _ASM_POWERPC_NVRAM_H */