mirror of https://gitee.com/openkylin/linux.git
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
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* NVRAM definitions and access functions.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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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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/* Signatures for nvram partitions */
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#define NVRAM_SIG_SP 0x02 /* support processor */
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#define NVRAM_SIG_OF 0x50 /* open firmware config */
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#define NVRAM_SIG_FW 0x51 /* general firmware */
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#define NVRAM_SIG_HW 0x52 /* hardware (VPD) */
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#define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */
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#define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */
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#define NVRAM_SIG_SYS 0x70 /* system env vars */
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#define NVRAM_SIG_CFG 0x71 /* config data */
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#define NVRAM_SIG_ELOG 0x72 /* error log */
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#define NVRAM_SIG_VEND 0x7e /* vendor defined */
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#define NVRAM_SIG_FREE 0x7f /* Free space */
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#define NVRAM_SIG_OS 0xa0 /* OS defined */
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#define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */
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#ifdef __KERNEL__
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#include <linux/errno.h>
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#include <linux/list.h>
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#ifdef CONFIG_PPC_PSERIES
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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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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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#endif /* __KERNEL__ */
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/* PowerMac specific nvram stuffs */
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enum {
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pmac_nvram_OF, /* Open Firmware partition */
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pmac_nvram_XPRAM, /* MacOS XPRAM partition */
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pmac_nvram_NR /* MacOS Name Registry partition */
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};
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#ifdef __KERNEL__
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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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/* Synchronize NVRAM */
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extern void nvram_sync(void);
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/* Determine NVRAM size */
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extern ssize_t nvram_get_size(void);
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/* Normal access to NVRAM */
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extern unsigned char nvram_read_byte(int i);
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extern void nvram_write_byte(unsigned char c, int i);
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#endif
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/* Some offsets in XPRAM */
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#define PMAC_XPRAM_MACHINE_LOC 0xe4
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#define PMAC_XPRAM_SOUND_VOLUME 0x08
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/* Machine location structure in PowerMac XPRAM */
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struct pmac_machine_location {
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unsigned int latitude; /* 2+30 bit Fractional number */
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unsigned int longitude; /* 2+30 bit Fractional number */
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unsigned int delta; /* mix of GMT delta and DLS */
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};
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/*
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* /dev/nvram ioctls
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*
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* Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
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* definitely obsolete. Do not use it if you can avoid it
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*/
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#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
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_IOWR('p', 0x40, int)
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#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
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#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
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#endif /* _ASM_POWERPC_NVRAM_H */
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