tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * PreP compliant NVRAM access
3 */
4
5#ifdef __KERNEL__
6#ifndef _PPC_NVRAM_H
7#define _PPC_NVRAM_H
8
9#define NVRAM_AS0 0x74
10#define NVRAM_AS1 0x75
11#define NVRAM_DATA 0x77
12
13
14/* RTC Offsets */
15
16#define MOTO_RTC_SECONDS 0x1FF9
17#define MOTO_RTC_MINUTES 0x1FFA
18#define MOTO_RTC_HOURS 0x1FFB
19#define MOTO_RTC_DAY_OF_WEEK 0x1FFC
20#define MOTO_RTC_DAY_OF_MONTH 0x1FFD
21#define MOTO_RTC_MONTH 0x1FFE
22#define MOTO_RTC_YEAR 0x1FFF
23#define MOTO_RTC_CONTROLA 0x1FF8
24#define MOTO_RTC_CONTROLB 0x1FF9
25
26/* PowerMac specific nvram stuffs */
27
28enum {
29 pmac_nvram_OF, /* Open Firmware partition */
30 pmac_nvram_XPRAM, /* MacOS XPRAM partition */
31 pmac_nvram_NR /* MacOS Name Registry partition */
32};
33
34/* Return partition offset in nvram */
35extern int pmac_get_partition(int partition);
36
37/* Direct access to XPRAM on PowerMacs */
38extern u8 pmac_xpram_read(int xpaddr);
39extern void pmac_xpram_write(int xpaddr, u8 data);
40
41/* Synchronize NVRAM */
42extern void nvram_sync(void);
43
44/* Normal access to NVRAM */
45extern unsigned char nvram_read_byte(int i);
46extern void nvram_write_byte(unsigned char c, int i);
47
48/* Some offsets in XPRAM */
49#define PMAC_XPRAM_MACHINE_LOC 0xe4
50#define PMAC_XPRAM_SOUND_VOLUME 0x08
51
52/* Machine location structure in PowerMac XPRAM */
53struct pmac_machine_location {
54 unsigned int latitude; /* 2+30 bit Fractional number */
55 unsigned int longitude; /* 2+30 bit Fractional number */
56 unsigned int delta; /* mix of GMT delta and DLS */
57};
58
59/*
60 * /dev/nvram ioctls
61 *
62 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
63 * definitely obsolete. Do not use it if you can avoid it
64 */
65
66#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
67 _IOWR('p', 0x40, int)
68
69#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
70#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
71
72#endif
73#endif /* __KERNEL__ */