asmacros.h revision 125081 
1/*-
2 * Copyright (c) 2001 Jake Burkholder.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/sparc64/include/asmacros.h 125081 2004-01-27 15:02:18Z kensmith $
27 */
28
29#ifndef	_MACHINE_ASMACROS_H_
30#define	_MACHINE_ASMACROS_H_
31
32#ifdef _KERNEL
33
34/*
35 * Normal and alternate %g6 point to the pcb of the current process.  Normal,
36 & alternate and interrupt %g7 point to per-cpu data.
37 */
38#define	PCB_REG		%g6
39#define	PCPU_REG	%g7
40
41/*
42 * Alternate %g5 points to a per-cpu panic stack, which is used as a last
43 * resort, and for temporarily saving alternate globals.
44 */
45#define	ASP_REG		%g5
46
47#ifdef LOCORE
48
49/*
50 * Atomically decrement an integer in memory.
51 */
52#define	ATOMIC_DEC_INT(r1, r2, r3) \
53	lduw	[r1], r2 ; \
549:	sub	r2, 1, r3 ; \
55	casa	[r1] ASI_N, r2, r3 ; \
56	cmp	r2, r3 ; \
57	bne,pn	%icc, 9b ; \
58	 mov	r3, r2
59
60/*
61 * Atomically increment an integer in memory.
62 */
63#define	ATOMIC_INC_INT(r1, r2, r3) \
64	lduw	[r1], r2 ; \
659:	add	r2, 1, r3 ; \
66	casa	[r1] ASI_N, r2, r3 ; \
67	cmp	r2, r3 ; \
68	bne,pn	%icc, 9b ; \
69	 mov	r3, r2
70
71/*
72 * Atomically increment an u_long in memory.
73 */
74#define	ATOMIC_INC_ULONG(r1, r2, r3) \
75	ldx	[r1], r2 ; \
769:	add	r2, 1, r3 ; \
77	casxa	[r1] ASI_N, r2, r3 ; \
78	cmp	r2, r3 ; \
79	bne,pn	%icc, 9b ; \
80	 mov	r3, r2
81
82/*
83 * Atomically clear a number of bits of an integer in memory.
84 */
85#define	ATOMIC_CLEAR_INT(r1, r2, r3, bits) \
86	lduw	[r1], r2 ; \
879:	andn	r2, bits, r3 ; \
88	casa	[r1] ASI_N, r2, r3 ; \
89	cmp	r2, r3 ; \
90	bne,pn	%icc, 9b ; \
91	 mov	r3, r2
92
93#define	PCPU(member)	PCPU_REG + PC_ ## member
94#define	PCPU_ADDR(member, reg) \
95	add	PCPU_REG, PC_ ## member, reg
96
97#define	DEBUGGER() \
98	ta	%xcc, 1
99
100#define	PANIC(msg, r1) \
101	.sect	.rodata ; \
1029:	.asciz	msg ; \
103	.previous ; \
104	SET(9b, r1, %o2) ; \
105	clr	%o1 ; \
106	clr	%o0 ; \
107	call	__panic ; \
108	 nop
109
110#ifdef INVARIANTS
111#define	KASSERT(r1, msg) \
112	brnz	r1, 8f ; \
113	 nop ; \
114	PANIC(msg, r1) ; \
1158:
116#else
117#define	KASSERT(r1, msg)
118#endif
119
120#define	PUTS(msg, r1) \
121	.sect	.rodata ; \
1229:	.asciz	msg ; \
123	.previous ; \
124	SET(9b, r1, %o0) ; \
125	call	printf ; \
126	 nop
127
128#define	_ALIGN_DATA	.align 8
129
130#define	DATA(name) \
131	.data ; \
132	_ALIGN_DATA ; \
133	.globl	name ; \
134	.type	name, @object ; \
135name:
136
137#define	EMPTY
138
139#endif /* LOCORE */
140
141#endif /* _KERNEL */
142
143#endif /* !_MACHINE_ASMACROS_H_ */
144