xref: /freebsd/sys/powerpc/include/cpu.h (revision 0782240958117692ab9861abb5483c9e64f6bc39)
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  * $FreeBSD$
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 
50 extern 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 
59 #define	PPC_FEATURE_BITMASK						\
60 	"\20"								\
61 	"\040PPC32\037PPC64\035ALTIVEC\034FPU\033MMU\031UNIFIEDCACHE"
62 
63 #define	TRAPF_USERMODE(frame)	(((frame)->srr1 & PSL_PR) != 0)
64 #define	TRAPF_PC(frame)		((frame)->srr0)
65 
66 #define	cpu_swapout(p)
67 #define	cpu_number()		0
68 
69 /*
70  * CTL_MACHDEP definitions.
71  */
72 #define	CPU_CACHELINE	1
73 
74 static __inline u_int64_t
75 get_cyclecount(void)
76 {
77 	u_int32_t _upper, _lower;
78 	u_int64_t _time;
79 
80 	__asm __volatile(
81 		"mftb %0\n"
82 		"mftbu %1"
83 		: "=r" (_lower), "=r" (_upper));
84 
85 	_time = (u_int64_t)_upper;
86 	_time = (_time << 32) + _lower;
87 	return (_time);
88 }
89 
90 #define	cpu_getstack(td)	((td)->td_frame->fixreg[1])
91 #define	cpu_spinwait()		/* nothing */
92 
93 extern char btext[];
94 extern char etext[];
95 
96 void	cpu_halt(void);
97 void	cpu_reset(void);
98 void	fork_trampoline(void);
99 void	swi_vm(void *);
100 
101 void	flush_disable_caches(void);
102 
103 #endif	/* _MACHINE_CPU_H_ */
104