cpu.h revision 279189 
1/*-
2 * Copyright (C) 1995-1997 Wolfgang Solfrank.
3 * Copyright (C) 1995-1997 TooLs GmbH.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 *	$NetBSD: cpu.h,v 1.11 2000/05/26 21:19:53 thorpej Exp $
32 * $FreeBSD: head/sys/powerpc/include/cpu.h 279189 2015-02-22 21:40:27Z nwhitehorn $
33 */
34
35#ifndef _MACHINE_CPU_H_
36#define	_MACHINE_CPU_H_
37
38#include <machine/frame.h>
39#include <machine/pcb.h>
40#include <machine/psl.h>
41
42/*
43 * CPU Feature Attributes
44 *
45 * These are defined in the PowerPC ELF ABI for the AT_HWCAP vector,
46 * and are exported to userland via the machdep.cpu_features
47 * sysctl.
48 */
49
50extern int cpu_features;
51
52#define	PPC_FEATURE_32		0x80000000	/* Always true */
53#define	PPC_FEATURE_64		0x40000000	/* Defined on a 64-bit CPU */
54#define	PPC_FEATURE_HAS_ALTIVEC	0x10000000
55#define	PPC_FEATURE_HAS_FPU	0x08000000
56#define	PPC_FEATURE_HAS_MMU	0x04000000
57#define PPC_FEATURE_UNIFIED_CACHE 0x01000000
58#define PPC_FEATURE_HAS_VSX	0x00000080
59
60#define	PPC_FEATURE_BITMASK						\
61	"\20"								\
62	"\040PPC32\037PPC64\035ALTIVEC\034FPU\033MMU\031UNIFIEDCACHE"	\
63	"\010VSX"
64
65#define	TRAPF_USERMODE(frame)	(((frame)->srr1 & PSL_PR) != 0)
66#define	TRAPF_PC(frame)		((frame)->srr0)
67
68#define	cpu_swapout(p)
69#define	cpu_number()		0
70
71/*
72 * CTL_MACHDEP definitions.
73 */
74#define	CPU_CACHELINE	1
75
76static __inline u_int64_t
77get_cyclecount(void)
78{
79	u_int32_t _upper, _lower;
80	u_int64_t _time;
81
82	__asm __volatile(
83		"mftb %0\n"
84		"mftbu %1"
85		: "=r" (_lower), "=r" (_upper));
86
87	_time = (u_int64_t)_upper;
88	_time = (_time << 32) + _lower;
89	return (_time);
90}
91
92#define	cpu_getstack(td)	((td)->td_frame->fixreg[1])
93#define	cpu_spinwait()		__asm __volatile("or 27,27,27") /* yield */
94
95extern char btext[];
96extern char etext[];
97
98void	cpu_halt(void);
99void	cpu_reset(void);
100void	cpu_sleep(void);
101void	flush_disable_caches(void);
102void	fork_trampoline(void);
103void	swi_vm(void *);
104
105#endif	/* _MACHINE_CPU_H_ */
106