[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, 675 Mass Ave, Cambridge, MA 02139, 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

*/

/* The following three symbols give information on
 the size of various data types.  */

#define SHORTBITS 16		/* Number of bits in a short */

#define INTBITS 32		/* Number of bits in an int */

#define LONGBITS 64		/* Number of bits in a long */

/* 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 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. */

#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


#define ORDINARY_LINK

#define LIBS_DEBUG
#define START_FILES pre-crt0.o


/* 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 56 bits for addresses */

#define VALBITS         56


/* 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) << LONGBITS-VALBITS) >> LONGBITS-VALBITS)
#define XUINT(a)        ((long)(a) & VALMASK)

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

#define XPNTR(a) XUINT (a)
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
	18	the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
	19
	20
	21	/* The following line tells the configuration script what sort of
	22	operating system this machine is likely to run.
	23	USUAL-OPSYS="note"
	24
	25	NOTE-START
	26	Use -opsystem=osf1
	27	NOTE-END
	28
	29	*/
	30
	31	/* The following three symbols give information on
	32	the size of various data types. */
	33
	34	#define SHORTBITS 16 /* Number of bits in a short */
	35
	36	#define INTBITS 32 /* Number of bits in an int */
	37
	38	#define LONGBITS 64 /* Number of bits in a long */
	39
74d3f806 KH	40	/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
	41	is the most significant byte. */
	42
	43	#undef WORDS_BIG_ENDIAN
	44
b061d5f1 RS	45	/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
	46	* group of arguments and treat it as an array of the arguments. */
	47
	48	#define NO_ARG_ARRAY
	49
	50	/* Define WORD_MACHINE if addresses and such have
	51	* to be corrected before they can be used as byte counts. */
	52
	53	/* #define WORD_MACHINE */
	54
	55	/* Now define a symbol for the cpu type, if your compiler
	56	does not define it automatically:
	57	Ones defined so far include vax, m68000, ns16000, pyramid,
	58	orion, tahoe, APOLLO and many others */
	59
	60	/* __alpha defined automatically */
	61
	62
	63	/* Use type EMACS_INT rather than a union, to represent Lisp_Object */
	64	/* This is desirable for most machines. */
	65
	66	#define NO_UNION_TYPE
	67
	68	/* Define the type to use. */
	69	#define EMACS_INT long
	70	#define EMACS_UINT unsigned long
	71
	72	/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
	73	the 24-bit bit field into an int. In other words, if bit fields
	74	are always unsigned.
	75
	76	If you use NO_UNION_TYPE, this flag does not matter. */
	77
	78	#define EXPLICIT_SIGN_EXTEND
	79
	80	/* Data type of load average, as read out of kmem. */
	81
	82	#define LOAD_AVE_TYPE long
	83
	84	/* Convert that into an integer that is 100 for a load average of 1.0 */
	85
	86	#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
	87
	88	/* Define CANNOT_DUMP on machines where unexec does not work.
	89	Then the function dump-emacs will not be defined
	90	and temacs will do (load "loadup") automatically unless told otherwise. */
	91
	92	/* #define CANNOT_DUMP */
	93
	94	/* Define VIRT_ADDR_VARIES if the virtual addresses of
	95	pure and impure space as loaded can vary, and even their
	96	relative order cannot be relied on.
	97
	98	Otherwise Emacs assumes that text space precedes data space,
	99	numerically. */
	100
	101	/* #define VIRT_ADDR_VARIES */
	102
	103	/* Define C_ALLOCA if this machine does not support a true alloca
	104	and the one written in C should be used instead.
	105	Define HAVE_ALLOCA to say that the system provides a properly
	106	working alloca function and it should be used.
	107	Define neither one if an assembler-language alloca
	108	in the file alloca.s should be used. */
109
110	#define HAVE_ALLOCA
111
112	/* GNU malloc and the relocating allocator do not work together
113	with X. */
114
115	#define SYSTEM_MALLOC
116
117	/* Define NO_REMAP if memory segmentation makes it not work well
118	to change the boundary between the text section and data section
119	when Emacs is dumped. If you define this, the preloaded Lisp
120	code will not be sharable; but that's better than failing completely. */
121
122	#define NO_REMAP
123
124	/* Some really obscure 4.2-based systems (like Sequent DYNIX)
125	* do not support asynchronous I/O (using SIGIO) on sockets,
126	* even though it works fine on tty's. If you have one of
127	* these systems, define the following, and then use it in
128	* config.h (or elsewhere) to decide when (not) to use SIGIO.
129	*
130	* You'd think this would go in an operating-system description file,
131	* but since it only occurs on some, but not all, BSD systems, the
132	* reasonable place to select for it is in the machine description
133	* file.
134	*/
135
136	/* #define NO_SOCK_SIGIO */
137
138
139	#define HAVE_X11R4
140	#define HAVE_X11R5
141
142
143	/* Describe layout of the address space in an executing process. */
144
145	#define TEXT_START 0x120000000
146	#define DATA_START 0x140000000
147
148	/* This is necessary for mem-limits.h, so that start_of_data gives
149	the correct value */
150
151	#define DATA_SEG_BITS 0x140000000
152
153
154	#define ORDINARY_LINK
155
156	#define LIBS_DEBUG
157	#define START_FILES pre-crt0.o
158
159
160	/* The program to be used for unexec. */
161
162	#define UNEXEC unexalpha.o
163
164
165	#define PNTR_COMPARISON_TYPE unsigned long
166
167	/* On the 64 bit architecture, we can use 56 bits for addresses */
168
169	#define VALBITS 56
170
171
172	/* This definition of MARKBIT is necessary because of the comparison of
173	ARRAY_MARK_FLAG and MARKBIT in an #if in lisp.h, which cpp doesn't like. */
174
175	#define MARKBIT 0x8000000000000000L
176
177
178	/* Define XINT and XUINT so that they can take arguments of type int */
179
180	#define XINT(a) (((long)(a) << LONGBITS-VALBITS) >> LONGBITS-VALBITS)
181	#define XUINT(a) ((long)(a) & VALMASK)
182
183	/* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
184
185	#define XPNTR(a) XUINT (a)