asmacros.h revision 89032 
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 89032 2002-01-08 04:34:20Z jake $
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/*
48 * MMU %g7 points to the user tsb.
49 */
50#define	TSB_REG		%g7
51
52#ifdef LOCORE
53
54/*
55 * Atomically decrement an integer in memory.
56 */
57#define	ATOMIC_DEC_INT(r1, r2, r3) \
58	lduw	[r1], r2 ; \
599:	sub	r2, 1, r3 ; \
60	casa	[r1] ASI_N, r2, r3 ; \
61	cmp	r2, r3 ; \
62	bne,pn	%xcc, 9b ; \
63	 mov	r3, r2
64
65/*
66 * Atomically increment an integer in memory.
67 */
68#define	ATOMIC_INC_INT(r1, r2, r3) \
69	lduw	[r1], r2 ; \
709:	add	r2, 1, r3 ; \
71	casa	[r1] ASI_N, r2, r3 ; \
72	cmp	r2, r3 ; \
73	bne,pn	%xcc, 9b ; \
74	 mov	r3, r2
75
76#define	PCPU(member)	%g7 + PC_ ## member
77#define	PCPU_ADDR(member, reg) add %g7, PC_ ## member, reg
78
79#define	DEBUGGER()	ta %xcc, 1
80
81#define	PANIC(msg, r1) \
82	.sect	.rodata ; \
839:	.asciz	msg ; \
84	.previous ; \
85	SET(9b, r1, %o0) ; \
86	call	panic ; \
87	 nop
88
89#ifdef INVARIANTS
90#define	KASSERT(r1, msg) \
91	brnz	r1, 8f ; \
92	 nop ; \
93	PANIC(msg, r1) ; \
948:
95#else
96#define	KASSERT(r1, msg)
97#endif
98
99#define	PUTS(msg, r1) \
100	.sect	.rodata ; \
1019:	.asciz	msg ; \
102	.previous ; \
103	SET(9b, r1, %o0) ; \
104	call	printf ; \
105	 nop
106
107/*
108 * If the kernel can be located above 4G, setx needs to be used to load
109 * symbol values, otherwise set is sufficient.
110 */
111#ifdef HIGH_KERNEL
112#define	SET(sym, tmp, dst) \
113	setx	sym, tmp, dst
114#else
115#define	SET(sym, tmp, dst) \
116	set	sym, dst
117#endif
118
119#endif /* LOCORE */
120
121#endif /* _KERNEL */
122
123#define	DATA(name) \
124	.data ; \
125	.globl	name ; \
126	.type	name, @object ; \
127name ## :
128
129#define	EMPTY
130
131#define	ENTRY(name) \
132	.text ; \
133	.align	16 ; \
134	.globl	name ; \
135	.type	name, @function ; \
136name ## :
137
138#define	END(name) \
139	.size	name, . - name
140
141#endif /* !_MACHINE_ASMACROS_H_ */
142