1/* $NetBSD: frame.h,v 1.35 2024/01/13 17:07:26 thorpej Exp $ */
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: Utah $Hdr: frame.h 1.8 92/12/20$
37 *
38 * @(#)frame.h 8.1 (Berkeley) 6/10/93
39 */
40
41#ifndef _M68K_FRAME_H_
42#define _M68K_FRAME_H_
43
44#include <m68k/cpuframe.h>
45
46/* common frame size */
47#define CFSIZE (sizeof(struct frame) - sizeof(union F_u))
48#define NFMTSIZE 9
49
50#define FMT0 0x0
51#define FMT1 0x1
52#define FMT2 0x2
53#define FMT3 0x3
54#define FMT4 0x4
55#define FMT7 0x7
56#define FMT8 0x8
57#define FMT9 0x9
58#define FMTA 0xA
59#define FMTB 0xB
60
61/* frame specific info sizes */
62#define FMT0SIZE 0
63#define FMT1SIZE 0
64#define FMT2SIZE sizeof(struct fmt2)
65#define FMT3SIZE sizeof(struct fmt3)
66#define FMT4SIZE sizeof(struct fmt4)
67#define FMT7SIZE sizeof(struct fmt7)
68#define FMT8SIZE sizeof(struct fmt8)
69#define FMT9SIZE sizeof(struct fmt9)
70#define FMTASIZE sizeof(struct fmtA)
71#define FMTBSIZE sizeof(struct fmtB)
72
73/* 68010 SSW bits */
74#define SSW1_RR 0x8000
75#define SSW1_IF 0x2000
76#define SSW1_DF 0x1000
77#define SSW1_RM 0x0800
78#define SSW1_HI 0x0400
79#define SSW1_BX 0x0200
80#define SSW1_RW 0x0100
81#define SSW1_FCMASK 0x000F
82
83/* 68020/68030 SSW bits */
84#define SSW_RC 0x2000
85#define SSW_RB 0x1000
86#define SSW_DF 0x0100
87#define SSW_RM 0x0080
88#define SSW_RW 0x0040
89#define SSW_FCMASK 0x0007
90
91/* 68040 SSW bits */
92#define SSW4_CP 0x8000
93#define SSW4_CU 0x4000
94#define SSW4_CT 0x2000
95#define SSW4_CM 0x1000
96#define SSW4_MA 0x0800
97#define SSW4_ATC 0x0400
98#define SSW4_LK 0x0200
99#define SSW4_RW 0x0100
100#define SSW4_WBSV 0x0080 /* really in WB status, not SSW */
101#define SSW4_SZMASK 0x0060
102#define SSW4_SZLW 0x0000
103#define SSW4_SZB 0x0020
104#define SSW4_SZW 0x0040
105#define SSW4_SZLN 0x0060
106#define SSW4_TTMASK 0x0018
107#define SSW4_TTNOR 0x0000
108#define SSW4_TTM16 0x0008
109#define SSW4_TMMASK 0x0007
110#define SSW4_TMDCP 0x0000
111#define SSW4_TMUD 0x0001
112#define SSW4_TMUC 0x0002
113#define SSW4_TMKD 0x0005
114#define SSW4_TMKC 0x0006
115
116/* 060 Fault Status Long Word (FPSP) */
117
118#define FSLW_MA 0x08000000
119#define FSLW_LK 0x02000000
120#define FSLW_RW 0x01800000
121
122#define FSLW_RW_R 0x01000000
123#define FSLW_RW_W 0x00800000
124
125#define FSLW_SIZE 0x00600000
126/*
127 * We better define the FSLW_SIZE values here, as the table given in the
128 * MC68060UM/AD rev. 0/1 p. 8-23 is wrong, and was corrected in the errata
129 * document.
130 */
131#define FSLW_SIZE_LONG 0x00000000
132#define FSLW_SIZE_BYTE 0x00200000
133#define FSLW_SIZE_WORD 0x00400000
134#define FSLW_SIZE_MV16 0x00600000
135
136#define FLSW_TT 0x00180000
137#define FSLW_TM 0x00070000
138#define FSLW_TM_SV 0x00040000
139
140
141
142#define FSLW_IO 0x00008000
143#define FSLW_PBE 0x00004000
144#define FSLW_SBE 0x00002000
145#define FSLW_PTA 0x00001000
146#define FSLW_PTB 0x00000800
147#define FSLW_IL 0x00000400
148#define FSLW_PF 0x00000200
149#define FSLW_SP 0x00000100
150#define FSLW_WP 0x00000080
151#define FSLW_TWE 0x00000040
152#define FSLW_RE 0x00000020
153#define FSLW_WE 0x00000010
154#define FSLW_TTR 0x00000008
155#define FSLW_BPE 0x00000004
156#define FSLW_SEE 0x00000001
157
158/* struct fpframe060 */
159#define FPF6_FMT_NULL 0x00
160#define FPF6_FMT_IDLE 0x60
161#define FPF6_FMT_EXCP 0xe0
162
163#define FPF6_V_BSUN 0
164#define FPF6_V_INEX12 1
165#define FPF6_V_DZ 2
166#define FPF6_V_UNFL 3
167#define FPF6_V_OPERR 4
168#define FPF6_V_OVFL 5
169#define FPF6_V_SNAN 6
170#define FPF6_V_UNSUP 7
171
172#if defined(_KERNEL)
173
174#include <m68k/signal.h>
175
176#if defined(COMPAT_16)
177/*
178 * Stack frame layout when delivering a signal.
179 */
180struct sigframe_sigcontext {
181 int sf_ra; /* handler return address */
182 int sf_signum; /* signal number for handler */
183 int sf_code; /* additional info for handler */
184 struct sigcontext *sf_scp; /* context pointer for handler */
185 struct sigcontext sf_sc; /* actual context */
186 struct sigstate sf_state; /* state of the hardware */
187};
188#endif
189
190struct sigframe_siginfo {
191 int sf_ra; /* return address for handler */
192 int sf_signum; /* "signum" argument for handler */
193 siginfo_t *sf_sip; /* "sip" argument for handler */
194 ucontext_t *sf_ucp; /* "ucp" argument for handler */
195 siginfo_t sf_si; /* actual saved siginfo */
196 ucontext_t sf_uc; /* actual saved ucontext */
197};
198
199/*
200 * Utility function to relocate the initial frame, make room to restore an
201 * exception frame and reenter the syscall.
202 */
203void reenter_syscall(struct frame *, int) __attribute__((__noreturn__));
204
205/*
206 * Create an FPU "idle" frame for use by cpu_setmcontext()
207 */
208extern void m68k_make_fpu_idle_frame(void);
209extern struct fpframe m68k_cached_fpu_idle_frame;
210
211void *getframe(struct lwp *, int, int *);
212void buildcontext(struct lwp *, void *, void *);
213#ifdef COMPAT_16
214void sendsig_sigcontext(const ksiginfo_t *, const sigset_t *);
215#endif
216
217#ifdef M68040
218int m68040_writeback(struct frame *, int);
219#endif
220
221#if defined(__mc68010__)
222/*
223 * Restartable atomic sequence-cased compare-and-swap for atomic_cas ops
224 * and locking primitives. We defined this here because it manipulates a
225 * "clockframe" as prepared by interrupt handlers.
226 */
227extern char _atomic_cas_ras_start;
228extern char _atomic_cas_ras_end;
229
230#define ATOMIC_CAS_CHECK(cfp) \
231do { \
232 if (! CLKF_USERMODE(cfp) && \
233 (CLKF_PC(cfp) < (u_long)&_atomic_cas_ras_end && \
234 CLKF_PC(cfp) > (u_long)&_atomic_cas_ras_start)) { \
235 (cfp)->cf_pc = (u_long)&_atomic_cas_ras_start; \
236 } \
237} while (/*CONSTCOND*/0)
238#else
239#define ATOMIC_CAS_CHECK(cfp) /* nothing */
240#endif /* __mc68010__ */
241
242static inline void **
243getvbr(void)
244{
245 void **vbr;
246
247 __asm volatile("movc %%vbr,%0" : "=r" (vbr));
248
249 return vbr;
250}
251
252static inline void
253setvbr(void **vbr)
254{
255 __asm volatile("movc %0,%%vbr" : : "r" (vbr));
256}
257
258#endif /* _KERNEL */
259
260#endif /* _M68K_FRAME_H_ */