5 * Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
14 * 2002/09/30 : bergner : Created
23 #include <linux/types.h>
27 * If the major version changes we are incompatible.
28 * Minor version changes are a hint.
30 #define SYSTEMCFG_MAJOR 1
31 #define SYSTEMCFG_MINOR 0
34 __u8 eye_catcher[16]; /* Eyecatcher: SYSTEMCFG:PPC64 0x00 */
35 struct { /* Systemcfg version numbers */
36 __u32 major; /* Major number 0x10 */
37 __u32 minor; /* Minor number 0x14 */
40 __u32 platform; /* Platform flags 0x18 */
41 __u32 processor; /* Processor type 0x1C */
42 __u64 processorCount; /* # of physical processors 0x20 */
43 __u64 physicalMemorySize; /* Size of real memory(B) 0x28 */
44 __u64 tb_orig_stamp; /* Timebase at boot 0x30 */
45 __u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */
46 __u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */
47 __u64 stamp_xsec; /* 0x48 */
48 __u64 tb_update_count; /* Timebase atomicity ctr 0x50 */
49 __u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */
50 __u32 tz_dsttime; /* Type of dst correction 0x5C */
51 __u32 dCacheL1Size; /* L1 d-cache size 0x60 */
52 __u32 dCacheL1LineSize; /* L1 d-cache line size 0x64 */
53 __u32 iCacheL1Size; /* L1 i-cache size 0x68 */
54 __u32 iCacheL1LineSize; /* L1 i-cache line size 0x6C */
55 __u8 reserved0[3984]; /* Reserve rest of page 0x70 */
59 extern struct systemcfg *systemcfg;
62 /* Processor Version Register (PVR) field extraction */
63 #define PVR_VER(pvr) (((pvr) >> 16) & 0xFFFF) /* Version field */
64 #define PVR_REV(pvr) (((pvr) >> 0) & 0xFFFF) /* Revison field */
66 /* Processor Version Numbers */
67 #define PV_NORTHSTAR 0x0033
68 #define PV_PULSAR 0x0034
69 #define PV_POWER4 0x0035
70 #define PV_ICESTAR 0x0036
71 #define PV_SSTAR 0x0037
72 #define PV_POWER4p 0x0038
73 #define PV_POWER4ul 0x0039
75 #define PV_630p 0x0041
77 /* Platforms supported by PPC64 */
78 #define PLATFORM_PSERIES 0x0100
79 #define PLATFORM_PSERIES_LPAR 0x0101
80 #define PLATFORM_ISERIES_LPAR 0x0201
83 static inline volatile struct systemcfg *systemcfg_init(void)
85 int fd = open("/proc/ppc64/systemcfg", O_RDONLY);
86 volatile struct systemcfg *ret;
90 ret = mmap(0, sizeof(struct systemcfg), PROT_READ, MAP_SHARED, fd, 0);
94 if (ret->version.major != SYSTEMCFG_MAJOR || ret->version.minor < SYSTEMCFG_MINOR) {
95 munmap((void *)ret, sizeof(struct systemcfg));
100 #endif /* __KERNEL__ */
102 #endif /* _SYSTEMCFG_H */