mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 21:02:19 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
154 lines
4.6 KiB
C
154 lines
4.6 KiB
C
/*
|
|
* PreP compliant NVRAM access
|
|
*/
|
|
|
|
/* Corey Minyard (minyard@acm.org) - Stolen from PReP book. Per the
|
|
license I must say:
|
|
(C) Copyright (Corey Minyard), (1998). All rights reserved
|
|
*/
|
|
|
|
/* Structure map for NVRAM on PowerPC Reference Platform */
|
|
/* All fields are either character/byte strings which are valid either
|
|
endian or they are big-endian numbers.
|
|
|
|
There are a number of Date and Time fields which are in RTC format,
|
|
big-endian. These are stored in UT (GMT).
|
|
|
|
For enum's: if given in hex then they are bit significant, i.e. only
|
|
one bit is on for each enum.
|
|
*/
|
|
#ifdef __KERNEL__
|
|
#ifndef _PPC_PREP_NVRAM_H
|
|
#define _PPC_PREP_NVRAM_H
|
|
|
|
#define MAX_PREP_NVRAM 0x8000
|
|
#define PREP_NVRAM_AS0 0x74
|
|
#define PREP_NVRAM_AS1 0x75
|
|
#define PREP_NVRAM_DATA 0x77
|
|
|
|
#define NVSIZE 4096 /* size of NVRAM */
|
|
#define OSAREASIZE 512 /* size of OSArea space */
|
|
#define CONFSIZE 1024 /* guess at size of Configuration space */
|
|
|
|
typedef struct _SECURITY {
|
|
unsigned long BootErrCnt; /* Count of boot password errors */
|
|
unsigned long ConfigErrCnt; /* Count of config password errors */
|
|
unsigned long BootErrorDT[2]; /* Date&Time from RTC of last error in pw */
|
|
unsigned long ConfigErrorDT[2]; /* Date&Time from RTC of last error in pw */
|
|
unsigned long BootCorrectDT[2]; /* Date&Time from RTC of last correct pw */
|
|
unsigned long ConfigCorrectDT[2]; /* Date&Time from RTC of last correct pw */
|
|
unsigned long BootSetDT[2]; /* Date&Time from RTC of last set of pw */
|
|
unsigned long ConfigSetDT[2]; /* Date&Time from RTC of last set of pw */
|
|
unsigned char Serial[16]; /* Box serial number */
|
|
} SECURITY;
|
|
|
|
typedef enum _OS_ID {
|
|
Unknown = 0,
|
|
Firmware = 1,
|
|
AIX = 2,
|
|
NT = 3,
|
|
MKOS2 = 4,
|
|
MKAIX = 5,
|
|
Taligent = 6,
|
|
Solaris = 7,
|
|
MK = 12
|
|
} OS_ID;
|
|
|
|
typedef struct _ERROR_LOG {
|
|
unsigned char ErrorLogEntry[40]; /* To be architected */
|
|
} ERROR_LOG;
|
|
|
|
typedef enum _BOOT_STATUS {
|
|
BootStarted = 0x01,
|
|
BootFinished = 0x02,
|
|
RestartStarted = 0x04,
|
|
RestartFinished = 0x08,
|
|
PowerFailStarted = 0x10,
|
|
PowerFailFinished = 0x20,
|
|
ProcessorReady = 0x40,
|
|
ProcessorRunning = 0x80,
|
|
ProcessorStart = 0x0100
|
|
} BOOT_STATUS;
|
|
|
|
typedef struct _RESTART_BLOCK {
|
|
unsigned short Version;
|
|
unsigned short Revision;
|
|
unsigned long ResumeReserve1[2];
|
|
volatile unsigned long BootStatus;
|
|
unsigned long CheckSum; /* Checksum of RESTART_BLOCK */
|
|
void * RestartAddress;
|
|
void * SaveAreaAddr;
|
|
unsigned long SaveAreaLength;
|
|
} RESTART_BLOCK;
|
|
|
|
typedef enum _OSAREA_USAGE {
|
|
Empty = 0,
|
|
Used = 1
|
|
} OSAREA_USAGE;
|
|
|
|
typedef enum _PM_MODE {
|
|
Suspend = 0x80, /* Part of state is in memory */
|
|
Normal = 0x00 /* No power management in effect */
|
|
} PMMODE;
|
|
|
|
typedef struct _HEADER {
|
|
unsigned short Size; /* NVRAM size in K(1024) */
|
|
unsigned char Version; /* Structure map different */
|
|
unsigned char Revision; /* Structure map the same -may
|
|
be new values in old fields
|
|
in other words old code still works */
|
|
unsigned short Crc1; /* check sum from beginning of nvram to OSArea */
|
|
unsigned short Crc2; /* check sum of config */
|
|
unsigned char LastOS; /* OS_ID */
|
|
unsigned char Endian; /* B if big endian, L if little endian */
|
|
unsigned char OSAreaUsage; /* OSAREA_USAGE */
|
|
unsigned char PMMode; /* Shutdown mode */
|
|
RESTART_BLOCK RestartBlock;
|
|
SECURITY Security;
|
|
ERROR_LOG ErrorLog[2];
|
|
|
|
/* Global Environment information */
|
|
void * GEAddress;
|
|
unsigned long GELength;
|
|
|
|
/* Date&Time from RTC of last change to Global Environment */
|
|
unsigned long GELastWriteDT[2];
|
|
|
|
/* Configuration information */
|
|
void * ConfigAddress;
|
|
unsigned long ConfigLength;
|
|
|
|
/* Date&Time from RTC of last change to Configuration */
|
|
unsigned long ConfigLastWriteDT[2];
|
|
unsigned long ConfigCount; /* Count of entries in Configuration */
|
|
|
|
/* OS dependent temp area */
|
|
void * OSAreaAddress;
|
|
unsigned long OSAreaLength;
|
|
|
|
/* Date&Time from RTC of last change to OSAreaArea */
|
|
unsigned long OSAreaLastWriteDT[2];
|
|
} HEADER;
|
|
|
|
/* Here is the whole map of the NVRAM */
|
|
typedef struct _NVRAM_MAP {
|
|
HEADER Header;
|
|
unsigned char GEArea[NVSIZE-CONFSIZE-OSAREASIZE-sizeof(HEADER)];
|
|
unsigned char OSArea[OSAREASIZE];
|
|
unsigned char ConfigArea[CONFSIZE];
|
|
} NVRAM_MAP;
|
|
|
|
/* Routines to manipulate the NVRAM */
|
|
void init_prep_nvram(void);
|
|
char *prep_nvram_get_var(const char *name);
|
|
char *prep_nvram_first_var(void);
|
|
char *prep_nvram_next_var(char *name);
|
|
|
|
/* Routines to read and write directly to the NVRAM */
|
|
unsigned char prep_nvram_read_val(int addr);
|
|
void prep_nvram_write_val(int addr,
|
|
unsigned char val);
|
|
|
|
#endif /* _PPC_PREP_NVRAM_H */
|
|
#endif /* __KERNEL__ */
|