1/*	$NetBSD: locore.h,v 1.4 2010/05/23 18:49:14 martin Exp $	*/
2
3/*
4 * Copyright (c) 1996-2002 Eduardo Horvath
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR  ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR  BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 */
26
27#undef	CURLWP
28#undef	CPCB
29#undef	FPLWP
30
31#define	CURLWP	(CPUINFO_VA + CI_CURLWP)
32#define	CPCB	(CPUINFO_VA + CI_CPCB)
33#define	FPLWP	(CPUINFO_VA + CI_FPLWP)
34
35/*
36 * Here are some defines to try to maintain consistency but still
37 * support 32-and 64-bit compilers.
38 */
39#ifdef _LP64
40/* reg that points to base of data/text segment */
41#define	BASEREG	%g4
42/* first constants for storage allocation */
43#define LNGSZ		8
44#define LNGSHFT		3
45#define PTRSZ		8
46#define PTRSHFT		3
47#define POINTER		.xword
48#define ULONG		.xword
49/* Now instructions to load/store pointers & long ints */
50#define LDLNG		ldx
51#define LDULNG		ldx
52#define STLNG		stx
53#define STULNG		stx
54#define LDPTR		ldx
55#define LDPTRA		ldxa
56#define STPTR		stx
57#define STPTRA		stxa
58#define	CASPTR		casxa
59/* Now something to calculate the stack bias */
60#define STKB		BIAS
61#define	CCCR		%xcc
62#else
63#define	BASEREG		%g0
64#define LNGSZ		4
65#define LNGSHFT		2
66#define PTRSZ		4
67#define PTRSHFT		2
68#define POINTER		.word
69#define ULONG		.word
70/* Instructions to load/store pointers & long ints */
71#define LDLNG		ldsw
72#define LDULNG		lduw
73#define STLNG		stw
74#define STULNG		stw
75#define LDPTR		lduw
76#define LDPTRA		lduwa
77#define STPTR		stw
78#define STPTRA		stwa
79#define	CASPTR		casa
80#define STKB		0
81#define	CCCR		%icc
82#endif
83
84/* Give this real authority: reset the machine */
85#define NOTREACHED	sir
86
87/* if < 32, copy by bytes, memcpy, kcopy, ... */
88#define	BCOPY_SMALL	32
89
90/* use as needed to align things on longword boundaries */
91#define	_ALIGN	.align 8
92#define ICACHE_ALIGN	.align	32
93
94/* A few convenient abbreviations for trapframe fields. */
95#define	TF_G	TF_GLOBAL
96#define	TF_O	TF_OUT
97#define	TF_L	TF_LOCAL
98#define	TF_I	TF_IN
99
100/* Let us use same syntax as C code */
101#define Debugger()	ta	1; nop
102
103
104/*
105 * This macro will clear out a cache line before an explicit
106 * access to that location.  It's mostly used to make certain
107 * loads bypassing the D$ do not get stale D$ data.
108 *
109 * It uses a register with the address to clear and a temporary
110 * which is destroyed.
111 */
112#ifdef DCACHE_BUG
113#define DLFLUSH(a,t) \
114	andn	a, 0x3f, t; \
115	stxa	%g0, [ t ] ASI_DCACHE_TAG; \
116	membar	#Sync
117/* The following can be used if the pointer is 32-byte aligned */
118#define DLFLUSH2(t) \
119	stxa	%g0, [ t ] ASI_DCACHE_TAG; \
120	membar	#Sync
121#else
122#define DLFLUSH(a,t)
123#define DLFLUSH2(t)
124#endif
125
126
127/*
128 * Combine 2 regs -- used to convert 64-bit ILP32
129 * values to LP64.
130 */
131#define	COMBINE(r1, r2, d)	\
132	clruw	r2;		\
133	sllx	r1, 32, d;	\
134	or	d, r2, d
135
136/*
137 * Split 64-bit value in 1 reg into high and low halves.
138 * Used for ILP32 return values.
139 */
140#define	SPLIT(r0, r1)		\
141	srl	r0, 0, r1;	\
142	srlx	r0, 32, r0
143
144
145/*
146 * A handy macro for maintaining instrumentation counters.
147 * Note that this clobbers %o0, %o1 and %o2.  Normal usage is
148 * something like:
149 *	foointr:
150 *		TRAP_SETUP(...)		! makes %o registers safe
151 *		INCR(_C_LABEL(cnt)+V_FOO)	! count a foo
152 */
153#define INCR(what) \
154	sethi	%hi(what), %o0; \
155	or	%o0, %lo(what), %o0; \
15699:	\
157	lduw	[%o0], %o1; \
158	add	%o1, 1, %o2; \
159	casa	[%o0] ASI_P, %o1, %o2; \
160	cmp	%o1, %o2; \
161	bne,pn	%icc, 99b; \
162	 nop
163
164/*
165 * A couple of handy macros to save and restore globals to/from
166 * locals.  Since udivrem uses several globals, and it's called
167 * from vsprintf, we need to do this before and after doing a printf.
168 */
169#define GLOBTOLOC \
170	mov	%g1, %l1; \
171	mov	%g2, %l2; \
172	mov	%g3, %l3; \
173	mov	%g4, %l4; \
174	mov	%g5, %l5; \
175	mov	%g6, %l6; \
176	mov	%g7, %l7
177
178#define LOCTOGLOB \
179	mov	%l1, %g1; \
180	mov	%l2, %g2; \
181	mov	%l3, %g3; \
182	mov	%l4, %g4; \
183	mov	%l5, %g5; \
184	mov	%l6, %g6; \
185	mov	%l7, %g7
186
187/* Load strings address into register; NOTE: hidden local label 99 */
188#define LOAD_ASCIZ(reg, s)	\
189	set	99f, reg ;	\
190	.data ;			\
19199:	.asciz	s ;		\
192	_ALIGN ;		\
193	.text
194
195/*
196 * Handy stack conversion macros.
197 * They correctly switch to requested stack type
198 * regardless of the current stack.
199 */
200
201#define TO_STACK64(size)					\
202	save	%sp, size, %sp;					\
203	add	%sp, -BIAS, %o0; /* Convert to 64-bits */	\
204	andcc	%sp, 1, %g0; /* 64-bit stack? */		\
205	movz	%icc, %o0, %sp
206
207#define TO_STACK32(size)					\
208	save	%sp, size, %sp;					\
209	add	%sp, +BIAS, %o0; /* Convert to 32-bits */	\
210	andcc	%sp, 1, %g0; /* 64-bit stack? */		\
211	movnz	%icc, %o0, %sp
212
213#ifdef _LP64
214#define	STACKFRAME(size)	TO_STACK64(size)
215#else
216#define	STACKFRAME(size)	TO_STACK32(size)
217#endif
218
219/*
220 * Primitives
221 */
222#ifdef ENTRY
223#undef ENTRY
224#endif
225
226#ifdef GPROF
227	.globl	_mcount
228#define	ENTRY(x) \
229	.globl _C_LABEL(x); .proc 1; .type _C_LABEL(x),@function; \
230_C_LABEL(x): ; \
231	.data; \
232	.align 8; \
2330:	.uaword 0; .uaword 0; \
234	.text;	\
235	save	%sp, -CC64FSZ, %sp; \
236	sethi	%hi(0b), %o0; \
237	call	_mcount; \
238	or	%o0, %lo(0b), %o0; \
239	restore
240#else
241#define	ENTRY(x)	.globl _C_LABEL(x); .proc 1; \
242	.type _C_LABEL(x),@function; _C_LABEL(x):
243#endif
244#define	ALTENTRY(x)	.globl _C_LABEL(x); _C_LABEL(x):
245
246
247