[bpt/emacs.git] / src / m / alpha.h

/* machine description file For the alpha chip.
   Copyright (C) 1994 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */


/* The following line tells the configuration script what sort of 
   operating system this machine is likely to run.
   USUAL-OPSYS="note"

NOTE-START
Use -opsystem=osf1
NOTE-END

*/

#define BITS_PER_LONG 64

/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
   is the most significant byte.  */

#undef WORDS_BIG_ENDIAN

/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
 * group of arguments and treat it as an array of the arguments.  */

#define NO_ARG_ARRAY

/* Define WORD_MACHINE if addresses and such have
 * to be corrected before they can be used as byte counts.  */

/* #define WORD_MACHINE */

/* Now define a symbol for the cpu type, if your compiler
   does not define it automatically:
   Ones defined so far include vax, m68000, ns16000, pyramid,
   orion, tahoe, APOLLO and many others */

/* __alpha defined automatically */


/* Use type EMACS_INT rather than a union, to represent Lisp_Object */
/* This is desirable for most machines.  */

#define NO_UNION_TYPE

/* Define the type to use.  */
#define EMACS_INT long
#define EMACS_UINT unsigned long
#define SPECIAL_EMACS_INT

/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
   the 24-bit bit field into an int.  In other words, if bit fields
   are always unsigned.

   If you use NO_UNION_TYPE, this flag does not matter.  */

#define EXPLICIT_SIGN_EXTEND

/* Data type of load average, as read out of kmem.  */

#define LOAD_AVE_TYPE long

/* Convert that into an integer that is 100 for a load average of 1.0  */

#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)

/* Define CANNOT_DUMP on machines where unexec does not work.
   Then the function dump-emacs will not be defined
   and temacs will do (load "loadup") automatically unless told otherwise.  */

/* #define CANNOT_DUMP */

/* Define VIRT_ADDR_VARIES if the virtual addresses of
   pure and impure space as loaded can vary, and even their
   relative order cannot be relied on.

   Otherwise Emacs assumes that text space precedes data space,
   numerically.  */

/* #define VIRT_ADDR_VARIES */

/* Define C_ALLOCA if this machine does not support a true alloca
   and the one written in C should be used instead.
   Define HAVE_ALLOCA to say that the system provides a properly
   working alloca function and it should be used.
   Define neither one if an assembler-language alloca
   in the file alloca.s should be used.  */

#define HAVE_ALLOCA

/* GNU malloc and the relocating allocator do not work together
   with X.   [Who wrote that?]  */

/* May 1995: reportedly [Rainer Schoepf <schoepf@uni-mainz.de>] both the
   system and the gnu malloc system work with "alpha-dec-osf3.0" and
   "alpha-dec-osf3.2".  */

/* May 1995: it seems to me [Morten Welinder <terra@diku.dk>] that both
   mallocs work with "alpha-dec-osf2.0", but I daren't break anything
   right now.  Feel free to play if you want.  */

/* #define SYSTEM_MALLOC */

/* Define NO_REMAP if memory segmentation makes it not work well
   to change the boundary between the text section and data section
   when Emacs is dumped.  If you define this, the preloaded Lisp
   code will not be sharable; but that's better than failing completely.  */

#define NO_REMAP

/* Some really obscure 4.2-based systems (like Sequent DYNIX)
 * do not support asynchronous I/O (using SIGIO) on sockets,
 * even though it works fine on tty's.  If you have one of
 * these systems, define the following, and then use it in
 * config.h (or elsewhere) to decide when (not) to use SIGIO.
 *
 * You'd think this would go in an operating-system description file,
 * but since it only occurs on some, but not all, BSD systems, the
 * reasonable place to select for it is in the machine description
 * file.
 */

/* #define NO_SOCK_SIGIO */


#define HAVE_X11R4
#define HAVE_X11R5


/* Describe layout of the address space in an executing process.  */

#define TEXT_START    0x120000000
#define DATA_START    0x140000000

/* This is necessary for mem-limits.h, so that start_of_data gives
   the correct value */

#define DATA_SEG_BITS 0x140000000

#ifdef OSF1
#define ORDINARY_LINK

/* Some systems seem to have this, others don't.  */
#ifdef HAVE_LIBDNET
#define LIBS_MACHINE -ldnet
#else
#define LIBS_MACHINE -ldnet_stub
#endif
#endif /* OSF1 */

#if 0 /* Rainer Schoepf <schoepf@uni-mainz.de> says this loses with X11R6
	 since it has only shared libraries.  */
#ifndef __GNUC__
/* This apparently is for the system ld as opposed to Gnu ld.  */
#ifdef OSF1
#define LD_SWITCH_MACHINE      -non_shared
#endif
#endif
#endif /* 0 */

#ifdef OSF1
#define LIBS_DEBUG
#define START_FILES pre-crt0.o
#endif

#ifdef LINUX
/* This controls a conditional in main.  */
#define LINUX_SBRK_BUG
#endif

/* The program to be used for unexec. */

#define UNEXEC unexalpha.o


#define PNTR_COMPARISON_TYPE unsigned long

/* On the 64 bit architecture, we can use 60 bits for addresses */

#define VALBITS         60


/* This definition of MARKBIT is necessary because of the comparison of
   ARRAY_MARK_FLAG and MARKBIT in an #if in lisp.h, which cpp doesn't like. */

#define MARKBIT         0x8000000000000000L


/* Define XINT and XUINT so that they can take arguments of type int */

#define XINT(a)  (((long) (a) << (BITS_PER_LONG - VALBITS)) >> (BITS_PER_LONG - VALBITS))
#define XUINT(a) ((long) (a) & VALMASK)

/* Define XPNTR to avoid or'ing with DATA_SEG_BITS */

#define XPNTR(a) XUINT (a)

/* Declare malloc and realloc in a way that is clean.
   But not in makefiles!  */

#ifndef NOT_C_CODE
/* We need these because pointers are larger than the default ints.  */
#include <alloca.h>

/* Hack alert!  For reasons unknown to mankind the string.h file insists
   on defining bcopy etc. as taking char pointers as arguments.  With
   Emacs this produces an endless amount of warning which are harmless,
   but tends to flood the real errors.  This hack works around this problem
   by not prototyping.  */
#define bcopy string_h_bcopy
#define bzero string_h_bzero
#define bcmp  string_h_bcmp
#include <string.h>
#undef bcopy
#undef bzero
#undef bcmp

/* We need to prototype these for the lib-src programs even if we don't
   use the system malloc for the Emacs proper.  */
#ifdef _MALLOC_INTERNAL
/* These declarations are designed to match the ones in gmalloc.c.  */
#if defined (__STDC__) && __STDC__
extern void *malloc (), *realloc (), *calloc ();
#else
extern char *malloc (), *realloc (), *calloc ();
#endif
#else /* not _MALLOC_INTERNAL */
extern void *malloc (), *realloc (), *calloc ();
#endif /* not _MALLOC_INTERNAL */


extern long *xmalloc (), *xrealloc ();

#ifdef REL_ALLOC
#ifndef _MALLOC_INTERNAL
/* "char *" because ralloc.c defines it that way.  gmalloc.c thinks it
   is allowed to prototype these as "void *" so we don't prototype in
   that case.  You're right: it stinks!  */
extern char *r_alloc (), *r_re_alloc ();
extern void r_alloc_free ();
#endif /* not _MALLOC_INTERNAL */
#endif /* REL_ALLOC */

#endif /* not NOT_C_CODE */

#ifdef OSF1
#define PTY_ITERATION		for (i = 0; i < 1; i++) /* ick */
#define PTY_NAME_SPRINTF	/* none */
#define PTY_TTY_NAME_SPRINTF	/* none */
#define PTY_OPEN					\
  do							\
    {							\
      int dummy;					\
      SIGMASKTYPE mask;					\
      mask = sigblockx (SIGCHLD);			\
      if (-1 == openpty (&fd, &dummy, pty_name, 0, 0))	\
	fd = -1;					\
      sigsetmask (mask);				\
      close (dummy);					\
    }							\
  while (0)
#endif

#ifdef linux
#define COFF
/* Linux/Alpha doesn't like it if termio.h and termios.h get included
   simultaneously.  */
#define NO_TERMIO

#define TEXT_END ({ extern int _etext; &_etext; })
#define DATA_END ({ extern int _EDATA; &_EDATA; })
#endif
Commit	Line	Data
b061d5f1 RS	1	/* machine description file For the alpha chip.
	2	Copyright (C) 1994 Free Software Foundation, Inc.
	3
	4	This file is part of GNU Emacs.
	5
	6	GNU Emacs is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 1, or (at your option)
	9	any later version.
	10
	11	GNU Emacs is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GNU Emacs; see the file COPYING. If not, write to
3b7ad313 EN	18	the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
3b7ad313 EN	19	Boston, MA 02111-1307, USA. */
b061d5f1 RS	20
	21
	22	/* The following line tells the configuration script what sort of
	23	operating system this machine is likely to run.
	24	USUAL-OPSYS="note"
	25
	26	NOTE-START
	27	Use -opsystem=osf1
	28	NOTE-END
	29
	30	*/
	31
5964b664	32	#define BITS_PER_LONG 64
b061d5f1	33
74d3f806 KH	34	/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
	35	is the most significant byte. */
	36
	37	#undef WORDS_BIG_ENDIAN
	38
b061d5f1 RS	39	/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
	40	* group of arguments and treat it as an array of the arguments. */
	41
	42	#define NO_ARG_ARRAY
	43
	44	/* Define WORD_MACHINE if addresses and such have
	45	* to be corrected before they can be used as byte counts. */
	46
	47	/* #define WORD_MACHINE */
	48
	49	/* Now define a symbol for the cpu type, if your compiler
	50	does not define it automatically:
	51	Ones defined so far include vax, m68000, ns16000, pyramid,
	52	orion, tahoe, APOLLO and many others */
	53
	54	/* __alpha defined automatically */
	55
	56
	57	/* Use type EMACS_INT rather than a union, to represent Lisp_Object */
	58	/* This is desirable for most machines. */
	59
	60	#define NO_UNION_TYPE
	61
	62	/* Define the type to use. */
	63	#define EMACS_INT long
	64	#define EMACS_UINT unsigned long
fbe0154a	65	#define SPECIAL_EMACS_INT
b061d5f1 RS	66
	67	/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
	68	the 24-bit bit field into an int. In other words, if bit fields
	69	are always unsigned.
	70
	71	If you use NO_UNION_TYPE, this flag does not matter. */
	72
	73	#define EXPLICIT_SIGN_EXTEND
	74
	75	/* Data type of load average, as read out of kmem. */
	76
	77	#define LOAD_AVE_TYPE long
	78
	79	/* Convert that into an integer that is 100 for a load average of 1.0 */
	80
	81	#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
	82
	83	/* Define CANNOT_DUMP on machines where unexec does not work.
	84	Then the function dump-emacs will not be defined
	85	and temacs will do (load "loadup") automatically unless told otherwise. */
	86
	87	/* #define CANNOT_DUMP */
	88
	89	/* Define VIRT_ADDR_VARIES if the virtual addresses of
	90	pure and impure space as loaded can vary, and even their
	91	relative order cannot be relied on.
	92
	93	Otherwise Emacs assumes that text space precedes data space,
	94	numerically. */
	95
	96	/* #define VIRT_ADDR_VARIES */
	97
	98	/* Define C_ALLOCA if this machine does not support a true alloca
	99	and the one written in C should be used instead.
	100	Define HAVE_ALLOCA to say that the system provides a properly
	101	working alloca function and it should be used.
	102	Define neither one if an assembler-language alloca
	103	in the file alloca.s should be used. */
	104
	105	#define HAVE_ALLOCA
	106
	107	/* GNU malloc and the relocating allocator do not work together
352c01a5 KH	108	with X. [Who wrote that?] */
	109
	110	/* May 1995: reportedly [Rainer Schoepf <schoepf@uni-mainz.de>] both the
	111	system and the gnu malloc system work with "alpha-dec-osf3.0" and
	112	"alpha-dec-osf3.2". */
	113
	114	/* May 1995: it seems to me [Morten Welinder <terra@diku.dk>] that both
	115	mallocs work with "alpha-dec-osf2.0", but I daren't break anything
	116	right now. Feel free to play if you want. */
b061d5f1	117
76869384	118	/* #define SYSTEM_MALLOC */
b061d5f1 RS	119
	120	/* Define NO_REMAP if memory segmentation makes it not work well
	121	to change the boundary between the text section and data section
	122	when Emacs is dumped. If you define this, the preloaded Lisp
	123	code will not be sharable; but that's better than failing completely. */
	124
	125	#define NO_REMAP
	126
	127	/* Some really obscure 4.2-based systems (like Sequent DYNIX)
	128	* do not support asynchronous I/O (using SIGIO) on sockets,
	129	* even though it works fine on tty's. If you have one of
	130	* these systems, define the following, and then use it in
	131	* config.h (or elsewhere) to decide when (not) to use SIGIO.
	132	*
	133	* You'd think this would go in an operating-system description file,
	134	* but since it only occurs on some, but not all, BSD systems, the
	135	* reasonable place to select for it is in the machine description
	136	* file.
	137	*/
	138
	139	/* #define NO_SOCK_SIGIO */
	140
	141
	142	#define HAVE_X11R4
	143	#define HAVE_X11R5
	144
	145
	146	/* Describe layout of the address space in an executing process. */
	147
	148	#define TEXT_START 0x120000000
	149	#define DATA_START 0x140000000
	150
	151	/* This is necessary for mem-limits.h, so that start_of_data gives
	152	the correct value */
	153
	154	#define DATA_SEG_BITS 0x140000000
	155
1596f1c9	156	#ifdef OSF1
b061d5f1 RS	157	#define ORDINARY_LINK
b061d5f1 RS	158
a1e7cebf KH	159	/* Some systems seem to have this, others don't. */
	160	#ifdef HAVE_LIBDNET
	161	#define LIBS_MACHINE -ldnet
	162	#else
	163	#define LIBS_MACHINE -ldnet_stub
	164	#endif
1596f1c9	165	#endif /* OSF1 */
a1e7cebf	166
1ba29850 RS	167	#if 0 /* Rainer Schoepf <schoepf@uni-mainz.de> says this loses with X11R6
1ba29850 RS	168	since it has only shared libraries. */
352c01a5 KH	169	#ifndef __GNUC__
352c01a5 KH	170	/* This apparently is for the system ld as opposed to Gnu ld. */
5f8e11f9 RS	171	#ifdef OSF1
	172	#define LD_SWITCH_MACHINE -non_shared
	173	#endif
352c01a5	174	#endif
1ba29850	175	#endif /* 0 */
5f8e11f9	176
1596f1c9	177	#ifdef OSF1
b061d5f1 RS	178	#define LIBS_DEBUG
b061d5f1 RS	179	#define START_FILES pre-crt0.o
045f778e	180	#endif
b061d5f1	181
629aa3cb RS	182	#ifdef LINUX
	183	/* This controls a conditional in main. */
	184	#define LINUX_SBRK_BUG
	185	#endif
b061d5f1 RS	186
	187	/* The program to be used for unexec. */
	188
	189	#define UNEXEC unexalpha.o
	190
	191
	192	#define PNTR_COMPARISON_TYPE unsigned long
	193
308c7a07	194	/* On the 64 bit architecture, we can use 60 bits for addresses */
b061d5f1	195
308c7a07	196	#define VALBITS 60
b061d5f1 RS	197
	198
	199	/* This definition of MARKBIT is necessary because of the comparison of
	200	ARRAY_MARK_FLAG and MARKBIT in an #if in lisp.h, which cpp doesn't like. */
	201
	202	#define MARKBIT 0x8000000000000000L
	203
	204
	205	/* Define XINT and XUINT so that they can take arguments of type int */
	206
5964b664	207	#define XINT(a) (((long) (a) << (BITS_PER_LONG - VALBITS)) >> (BITS_PER_LONG - VALBITS))
a1e7cebf	208	#define XUINT(a) ((long) (a) & VALMASK)
b061d5f1 RS	209
	210	/* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
	211
	212	#define XPNTR(a) XUINT (a)
fbe0154a RS	213
	214	/* Declare malloc and realloc in a way that is clean.
	215	But not in makefiles! */
	216
	217	#ifndef NOT_C_CODE
fbe0154a RS	218	/* We need these because pointers are larger than the default ints. */
fbe0154a RS	219	#include <alloca.h>
d9780682 RS	220
	221	/* Hack alert! For reasons unknown to mankind the string.h file insists
	222	on defining bcopy etc. as taking char pointers as arguments. With
	223	Emacs this produces an endless amount of warning which are harmless,
	224	but tends to flood the real errors. This hack works around this problem
	225	by not prototyping. */
	226	#define bcopy string_h_bcopy
	227	#define bzero string_h_bzero
	228	#define bcmp string_h_bcmp
fbe0154a	229	#include <string.h>
d9780682 RS	230	#undef bcopy
	231	#undef bzero
	232	#undef bcmp
	233
352c01a5 KH	234	/* We need to prototype these for the lib-src programs even if we don't
352c01a5 KH	235	use the system malloc for the Emacs proper. */
76869384	236	#ifdef _MALLOC_INTERNAL
1ba29850 RS	237	/* These declarations are designed to match the ones in gmalloc.c. */
1ba29850 RS	238	#if defined (__STDC__) && __STDC__
6441db6b	239	extern void malloc (), realloc (), *calloc ();
1ba29850	240	#else
6441db6b	241	extern char malloc (), realloc (), *calloc ();
1ba29850	242	#endif
76869384	243	#else /* not _MALLOC_INTERNAL */
6441db6b	244	extern void malloc (), realloc (), *calloc ();
76869384 RS	245	#endif /* not _MALLOC_INTERNAL */
76869384 RS	246
352c01a5	247
fbe0154a	248	extern long xmalloc (), xrealloc ();
352c01a5 KH	249
	250	#ifdef REL_ALLOC
	251	#ifndef _MALLOC_INTERNAL
	252	/* "char *" because ralloc.c defines it that way. gmalloc.c thinks it
	253	is allowed to prototype these as "void *" so we don't prototype in
	254	that case. You're right: it stinks! */
	255	extern char r_alloc (), r_re_alloc ();
	256	extern void r_alloc_free ();
	257	#endif /* not _MALLOC_INTERNAL */
	258	#endif /* REL_ALLOC */
	259
352c01a5	260	#endif /* not NOT_C_CODE */
7a8b824c	261
1596f1c9	262	#ifdef OSF1
7a8b824c RS	263	#define PTY_ITERATION for (i = 0; i < 1; i++) /* ick */
	264	#define PTY_NAME_SPRINTF /* none */
	265	#define PTY_TTY_NAME_SPRINTF /* none */
	266	#define PTY_OPEN \
	267	do \
	268	{ \
	269	int dummy; \
cfbeebb0 KH	270	SIGMASKTYPE mask; \
cfbeebb0 KH	271	mask = sigblockx (SIGCHLD); \
7a8b824c RS	272	if (-1 == openpty (&fd, &dummy, pty_name, 0, 0)) \
7a8b824c RS	273	fd = -1; \
cfbeebb0	274	sigsetmask (mask); \
7a8b824c RS	275	close (dummy); \
	276	} \
	277	while (0)
1596f1c9	278	#endif
ee803128 RS	279
	280	#ifdef linux
	281	#define COFF
	282	/* Linux/Alpha doesn't like it if termio.h and termios.h get included
	283	simultaneously. */
	284	#define NO_TERMIO
	285
3a0b4260 RS	286	#define TEXT_END ({ extern int _etext; &_etext; })
3a0b4260 RS	287	#define DATA_END ({ extern int _EDATA; &_EDATA; })
ee803128	288	#endif