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frame.h revision 1.32
      1 /*	$NetBSD: frame.h,v 1.32 2023/09/26 12:46:30 tsutsui 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 #define	V_BUSERR	0x008
     74 #define	V_ADDRERR	0x00C
     75 #define	V_TRAP1		0x084
     76 
     77 /* 68010 SSW bits */
     78 #define SSW1_RR		0x8000
     79 #define SSW1_IF		0x2000
     80 #define SSW1_DF		0x1000
     81 #define SSW1_RM		0x0800
     82 #define SSW1_HI		0x0400
     83 #define SSW1_BX		0x0200
     84 #define SSW1_RW		0x0100
     85 #define SSW1_FCMASK	0x000F
     86 
     87 /* 68020/68030 SSW bits */
     88 #define	SSW_RC		0x2000
     89 #define	SSW_RB		0x1000
     90 #define	SSW_DF		0x0100
     91 #define	SSW_RM		0x0080
     92 #define	SSW_RW		0x0040
     93 #define	SSW_FCMASK	0x0007
     94 
     95 /* 68040 SSW bits */
     96 #define	SSW4_CP		0x8000
     97 #define	SSW4_CU		0x4000
     98 #define	SSW4_CT		0x2000
     99 #define	SSW4_CM		0x1000
    100 #define	SSW4_MA		0x0800
    101 #define	SSW4_ATC	0x0400
    102 #define	SSW4_LK		0x0200
    103 #define	SSW4_RW		0x0100
    104 #define SSW4_WBSV	0x0080	/* really in WB status, not SSW */
    105 #define	SSW4_SZMASK	0x0060
    106 #define	SSW4_SZLW	0x0000
    107 #define	SSW4_SZB	0x0020
    108 #define	SSW4_SZW	0x0040
    109 #define	SSW4_SZLN	0x0060
    110 #define	SSW4_TTMASK	0x0018
    111 #define	SSW4_TTNOR	0x0000
    112 #define	SSW4_TTM16	0x0008
    113 #define	SSW4_TMMASK	0x0007
    114 #define	SSW4_TMDCP	0x0000
    115 #define	SSW4_TMUD	0x0001
    116 #define	SSW4_TMUC	0x0002
    117 #define	SSW4_TMKD	0x0005
    118 #define	SSW4_TMKC	0x0006
    119 
    120 /* 060 Fault Status Long Word (FPSP) */
    121 
    122 #define FSLW_MA		0x08000000
    123 #define FSLW_LK		0x02000000
    124 #define FSLW_RW		0x01800000
    125 
    126 #define FSLW_RW_R	0x01000000
    127 #define FSLW_RW_W	0x00800000
    128 
    129 #define FSLW_SIZE	0x00600000
    130 /*
    131  * We better define the FSLW_SIZE values here, as the table given in the
    132  * MC68060UM/AD rev. 0/1 p. 8-23 is wrong, and was corrected in the errata
    133  * document.
    134  */
    135 #define FSLW_SIZE_LONG	0x00000000
    136 #define FSLW_SIZE_BYTE	0x00200000
    137 #define FSLW_SIZE_WORD	0x00400000
    138 #define FSLW_SIZE_MV16	0x00600000
    139 
    140 #define FLSW_TT		0x00180000
    141 #define FSLW_TM		0x00070000
    142 #define FSLW_TM_SV	0x00040000
    143 
    144 
    145 
    146 #define FSLW_IO		0x00008000
    147 #define FSLW_PBE	0x00004000
    148 #define FSLW_SBE	0x00002000
    149 #define FSLW_PTA	0x00001000
    150 #define FSLW_PTB 	0x00000800
    151 #define FSLW_IL 	0x00000400
    152 #define FSLW_PF 	0x00000200
    153 #define FSLW_SP 	0x00000100
    154 #define FSLW_WP 	0x00000080
    155 #define FSLW_TWE 	0x00000040
    156 #define FSLW_RE 	0x00000020
    157 #define FSLW_WE 	0x00000010
    158 #define FSLW_TTR 	0x00000008
    159 #define FSLW_BPE 	0x00000004
    160 #define FSLW_SEE 	0x00000001
    161 
    162 /* struct fpframe060 */
    163 #define FPF6_FMT_NULL	0x00
    164 #define FPF6_FMT_IDLE	0x60
    165 #define FPF6_FMT_EXCP	0xe0
    166 
    167 #define	FPF6_V_BSUN	0
    168 #define	FPF6_V_INEX12	1
    169 #define	FPF6_V_DZ	2
    170 #define	FPF6_V_UNFL	3
    171 #define	FPF6_V_OPERR	4
    172 #define	FPF6_V_OVFL	5
    173 #define	FPF6_V_SNAN	6
    174 #define	FPF6_V_UNSUP	7
    175 
    176 #if defined(_KERNEL)
    177 
    178 #include <m68k/signal.h>
    179 
    180 #if defined(COMPAT_16)
    181 /*
    182  * Stack frame layout when delivering a signal.
    183  */
    184 struct sigframe_sigcontext {
    185 	int	sf_ra;			/* handler return address */
    186 	int	sf_signum;		/* signal number for handler */
    187 	int	sf_code;		/* additional info for handler */
    188 	struct sigcontext *sf_scp;	/* context pointer for handler */
    189 	struct sigcontext sf_sc;	/* actual context */
    190 	struct sigstate sf_state;	/* state of the hardware */
    191 };
    192 #endif
    193 
    194 struct sigframe_siginfo {
    195 	int		sf_ra;		/* return address for handler */
    196 	int		sf_signum;	/* "signum" argument for handler */
    197 	siginfo_t	*sf_sip;	/* "sip" argument for handler */
    198 	ucontext_t	*sf_ucp;	/* "ucp" argument for handler */
    199 	siginfo_t	sf_si;		/* actual saved siginfo */
    200 	ucontext_t	sf_uc;		/* actual saved ucontext */
    201 };
    202 
    203 /*
    204  * Utility function to relocate the initial frame, make room to restore an
    205  * exception frame and reenter the syscall.
    206  */
    207 void	reenter_syscall(struct frame *, int) __attribute__((__noreturn__));
    208 
    209 /*
    210  * Create an FPU "idle" frame for use by cpu_setmcontext()
    211  */
    212 extern void m68k_make_fpu_idle_frame(void);
    213 extern struct fpframe m68k_cached_fpu_idle_frame;
    214 
    215 void	*getframe(struct lwp *, int, int *);
    216 void	buildcontext(struct lwp *, void *, void *);
    217 #ifdef COMPAT_16
    218 void	sendsig_sigcontext(const ksiginfo_t *, const sigset_t *);
    219 #endif
    220 
    221 #ifdef M68040
    222 int	m68040_writeback(struct frame *, int);
    223 #endif
    224 
    225 #if defined(__mc68010__)
    226 /*
    227  * Restartable atomic sequence-cased compare-and-swap for atomic_cas ops
    228  * and locking primitives.  We defined this here because it manipulates a
    229  * "clockframe" as prepared by interrupt handlers.
    230  */
    231 extern char	_atomic_cas_ras_start;
    232 extern char	_atomic_cas_ras_end;
    233 
    234 #define ATOMIC_CAS_CHECK(cfp)						\
    235 do {									\
    236 	if (! CLKF_USERMODE(cfp) &&					\
    237 	    (CLKF_PC(cfp) < (u_long)&_atomic_cas_ras_end &&		\
    238 	     CLKF_PC(cfp) > (u_long)&_atomic_cas_ras_start)) {		\
    239 	    	(cfp)->cf_pc = (u_long)&_atomic_cas_ras_start;		\
    240 	}								\
    241 } while (/*CONSTCOND*/0)
    242 #else
    243 #define	ATOMIC_CAS_CHECK(cfp)	/* nothing */
    244 #endif /* __mc68010__ */
    245 
    246 #endif	/* _KERNEL */
    247 
    248 #endif	/* _M68K_FRAME_H_ */
    249