[mirror_ubuntu-jammy-kernel.git] / include / asm-powerpc / vdso_datapage.h

#ifndef _VDSO_DATAPAGE_H
#define _VDSO_DATAPAGE_H

/*
 * Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM
 * Copyright (C) 2005 Benjamin Herrenschmidy <benh@kernel.crashing.org>,
 * 		      IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */


/*
 * Note about this structure:
 *
 * This structure was historically called systemcfg and exposed to
 * userland via /proc/ppc64/systemcfg. Unfortunately, this became an
 * ABI issue as some proprietary software started relying on being able
 * to mmap() it, thus we have to keep the base layout at least for a
 * few kernel versions.
 *
 * However, since ppc32 doesn't suffer from this backward handicap,
 * a simpler version of the data structure is used there with only the
 * fields actually used by the vDSO.
 *
 */

/*
 * If the major version changes we are incompatible.
 * Minor version changes are a hint.
 */
#define SYSTEMCFG_MAJOR 1
#define SYSTEMCFG_MINOR 1

#ifndef __ASSEMBLY__

#include <linux/unistd.h>

#define SYSCALL_MAP_SIZE      ((__NR_syscalls + 31) / 32)

/*
 * So here is the ppc64 backward compatible version
 */

#ifdef CONFIG_PPC64

struct vdso_data {
	__u8  eye_catcher[16];		/* Eyecatcher: SYSTEMCFG:PPC64	0x00 */
	struct {			/* Systemcfg version numbers	     */
		__u32 major;		/* Major number			0x10 */
		__u32 minor;		/* Minor number			0x14 */
	} version;

	__u32 platform;			/* Platform flags		0x18 */
	__u32 processor;		/* Processor type		0x1C */
	__u64 processorCount;		/* # of physical processors	0x20 */
	__u64 physicalMemorySize;	/* Size of real memory(B)	0x28 */
	__u64 tb_orig_stamp;		/* Timebase at boot		0x30 */
	__u64 tb_ticks_per_sec;		/* Timebase tics / sec		0x38 */
	__u64 tb_to_xs;			/* Inverse of TB to 2^20	0x40 */
	__u64 stamp_xsec;		/*				0x48 */
	__u64 tb_update_count;		/* Timebase atomicity ctr	0x50 */
	__u32 tz_minuteswest;		/* Minutes west of Greenwich	0x58 */
	__u32 tz_dsttime;		/* Type of dst correction	0x5C */
	__u32 dcache_size;		/* L1 d-cache size		0x60 */
	__u32 dcache_line_size;		/* L1 d-cache line size		0x64 */
	__u32 icache_size;		/* L1 i-cache size		0x68 */
	__u32 icache_line_size;		/* L1 i-cache line size		0x6C */

	/* those additional ones don't have to be located anywhere
	 * special as they were not part of the original systemcfg
	 */
	__s64 wtom_clock_sec;			/* Wall to monotonic clock */
	__s32 wtom_clock_nsec;
   	__u32 syscall_map_64[SYSCALL_MAP_SIZE]; /* map of syscalls  */
   	__u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
};

#else /* CONFIG_PPC64 */

/*
 * And here is the simpler 32 bits version
 */
struct vdso_data {
	__u64 tb_orig_stamp;		/* Timebase at boot		0x30 */
	__u64 tb_ticks_per_sec;		/* Timebase tics / sec		0x38 */
	__u64 tb_to_xs;			/* Inverse of TB to 2^20	0x40 */
	__u64 stamp_xsec;		/*				0x48 */
	__u32 tb_update_count;		/* Timebase atomicity ctr	0x50 */
	__u32 tz_minuteswest;		/* Minutes west of Greenwich	0x58 */
	__u32 tz_dsttime;		/* Type of dst correction	0x5C */
	__s32 wtom_clock_sec;			/* Wall to monotonic clock */
	__s32 wtom_clock_nsec;
   	__u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
};

#endif /* CONFIG_PPC64 */

#ifdef __KERNEL__
extern struct vdso_data *vdso_data;
#endif

#endif /* __ASSEMBLY__ */

#endif /* _SYSTEMCFG_H */
Commit	Line	Data
a7f290da BH	1	#ifndef _VDSO_DATAPAGE_H
	2	#define _VDSO_DATAPAGE_H
	3
	4	/*
	5	* Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM
	6	* Copyright (C) 2005 Benjamin Herrenschmidy <benh@kernel.crashing.org>,
	7	* IBM Corp.
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License
	11	* as published by the Free Software Foundation; either version
	12	* 2 of the License, or (at your option) any later version.
	13	*/
	14
	15
	16	/*
	17	* Note about this structure:
	18	*
	19	* This structure was historically called systemcfg and exposed to
	20	* userland via /proc/ppc64/systemcfg. Unfortunately, this became an
	21	* ABI issue as some proprietary software started relying on being able
	22	* to mmap() it, thus we have to keep the base layout at least for a
	23	* few kernel versions.
	24	*
	25	* However, since ppc32 doesn't suffer from this backward handicap,
	26	* a simpler version of the data structure is used there with only the
	27	* fields actually used by the vDSO.
	28	*
	29	*/
	30
	31	/*
	32	* If the major version changes we are incompatible.
	33	* Minor version changes are a hint.
	34	*/
	35	#define SYSTEMCFG_MAJOR 1
	36	#define SYSTEMCFG_MINOR 1
	37
	38	#ifndef __ASSEMBLY__
	39
	40	#include <linux/unistd.h>
	41
	42	#define SYSCALL_MAP_SIZE ((__NR_syscalls + 31) / 32)
	43
	44	/*
	45	* So here is the ppc64 backward compatible version
	46	*/
	47
	48	#ifdef CONFIG_PPC64
	49
	50	struct vdso_data {
	51	__u8 eye_catcher[16]; /* Eyecatcher: SYSTEMCFG:PPC64 0x00 */
	52	struct { /* Systemcfg version numbers */
	53	__u32 major; /* Major number 0x10 */
	54	__u32 minor; /* Minor number 0x14 */
	55	} version;
	56
	57	__u32 platform; /* Platform flags 0x18 */
	58	__u32 processor; /* Processor type 0x1C */
	59	__u64 processorCount; /* # of physical processors 0x20 */
	60	__u64 physicalMemorySize; /* Size of real memory(B) 0x28 */
	61	__u64 tb_orig_stamp; /* Timebase at boot 0x30 */
	62	__u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */
	63	__u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */
	64	__u64 stamp_xsec; /* 0x48 */
65	__u64 tb_update_count; /* Timebase atomicity ctr 0x50 */
66	__u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */
67	__u32 tz_dsttime; /* Type of dst correction 0x5C */
68	__u32 dcache_size; /* L1 d-cache size 0x60 */
69	__u32 dcache_line_size; /* L1 d-cache line size 0x64 */
70	__u32 icache_size; /* L1 i-cache size 0x68 */
71	__u32 icache_line_size; /* L1 i-cache line size 0x6C */
72
73	/* those additional ones don't have to be located anywhere
74	* special as they were not part of the original systemcfg
75	*/
76	__s64 wtom_clock_sec; /* Wall to monotonic clock */
77	__s32 wtom_clock_nsec;
78	__u32 syscall_map_64[SYSCALL_MAP_SIZE]; /* map of syscalls */
79	__u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
80	};
81
82	#else /* CONFIG_PPC64 */
83
84	/*
85	* And here is the simpler 32 bits version
86	*/
87	struct vdso_data {
88	__u64 tb_orig_stamp; /* Timebase at boot 0x30 */
89	__u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */
90	__u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */
91	__u64 stamp_xsec; /* 0x48 */
92	__u32 tb_update_count; /* Timebase atomicity ctr 0x50 */
93	__u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */
94	__u32 tz_dsttime; /* Type of dst correction 0x5C */
95	__s32 wtom_clock_sec; /* Wall to monotonic clock */
96	__s32 wtom_clock_nsec;
97	__u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
98	};
99
100	#endif /* CONFIG_PPC64 */
101
102	#ifdef __KERNEL__
103	extern struct vdso_data *vdso_data;
104	#endif
105
106	#endif /* __ASSEMBLY__ */
107
108	#endif /* _SYSTEMCFG_H */