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

/* machine description file For the powerpc Macintosh.
   Copyright (C) 1994, 2001, 2002 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.  */

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

#define 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 */

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

#define NO_UNION_TYPE

/* 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)

/* 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 */

#if defined(__OpenBSD__)
#define ORDINARY_LINK
#endif

#define UNEXEC unexelf.o

#define NO_TERMIO

#if defined (LINUX) || defined (__NetBSD__) || defined (__OpenBSD__)
# define TEXT_END ({ extern int _etext; &_etext; })
#endif

#if (defined (__NetBSD__) || defined (__OpenBSD__)) && defined (__ELF__)
#define HAVE_TEXT_START
#endif

/* NAKAJI Hiroyuki <nakaji@tutrp.tut.ac.jp> says this is needed
   For MkLinux/LinuxPPC.  */

#ifdef LINUX
#define LINKER $(CC) -nostdlib
#define LD_SWITCH_MACHINE -Xlinker -m -Xlinker elf32ppc
/* s/gnu-linux.h defines this to `-z nocombreloc' which does not work here
   because prefix-args is not used.  */
#undef LD_SWITCH_SYSTEM_TEMACS
#define LD_SWITCH_MACHINE_TEMACS -Xlinker -znocombreloc
#endif

#if 0  /* This breaks things on PPC GNU/Linux ecept for Yellowdog,
	  even with identical GCC, as, ld.  Let's take it out until we
	  know what's really going on here.  */
/* GCC 2.95 and newer on GNU/Linux PPC changed the load address to
   0x10000000.  */
#if defined __linux__
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
#define DATA_SEG_BITS  0x10000000
#endif
#endif
#endif /* 0 */

/* arch-tag: 41913e4e-e7d1-4023-aadb-210cc31712ed
   (do not change this comment) */
Commit	Line	Data
863c15b6	1	/* machine description file For the powerpc Macintosh.
d8f6d720	2	Copyright (C) 1994, 2001, 2002 Free Software Foundation, Inc.
863c15b6 DL	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, Inc., 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
	20
	21	/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
	22	is the most significant byte. */
	23
	24	#define WORDS_BIG_ENDIAN
	25
	26	/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
	27	* group of arguments and treat it as an array of the arguments. */
	28
	29	#define NO_ARG_ARRAY
	30
	31	/* Define WORD_MACHINE if addresses and such have
	32	* to be corrected before they can be used as byte counts. */
	33
	34	/* #define WORD_MACHINE */
	35
	36	/* Now define a symbol for the cpu type, if your compiler
	37	does not define it automatically:
	38	Ones defined so far include vax, m68000, ns16000, pyramid,
	39	orion, tahoe, APOLLO and many others */
	40
	41	/* Use type EMACS_INT rather than a union, to represent Lisp_Object */
	42	/* This is desirable for most machines. */
	43
	44	#define NO_UNION_TYPE
	45
	46	/* Data type of load average, as read out of kmem. */
	47
	48	#define LOAD_AVE_TYPE long
	49
	50	/* Convert that into an integer that is 100 for a load average of 1.0 */
	51
	52	#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
	53
863c15b6 DL	54	/* Some really obscure 4.2-based systems (like Sequent DYNIX)
	55	* do not support asynchronous I/O (using SIGIO) on sockets,
	56	* even though it works fine on tty's. If you have one of
	57	* these systems, define the following, and then use it in
	58	* config.h (or elsewhere) to decide when (not) to use SIGIO.
	59	*
	60	* You'd think this would go in an operating-system description file,
	61	* but since it only occurs on some, but not all, BSD systems, the
	62	* reasonable place to select for it is in the machine description
	63	* file.
	64	*/
	65
	66	/* #define NO_SOCK_SIGIO */
	67
69e82333	68	#if defined(__OpenBSD__)
863c15b6 DL	69	#define ORDINARY_LINK
	70	#endif
	71
	72	#define UNEXEC unexelf.o
	73
	74	#define NO_TERMIO
	75
	76	#if defined (LINUX) \|\| defined (__NetBSD__) \|\| defined (__OpenBSD__)
	77	# define TEXT_END ({ extern int _etext; &_etext; })
	78	#endif
	79
	80	#if (defined (__NetBSD__) \|\| defined (__OpenBSD__)) && defined (__ELF__)
	81	#define HAVE_TEXT_START
	82	#endif
2c8a6e9e GM	83
	84	/* NAKAJI Hiroyuki <nakaji@tutrp.tut.ac.jp> says this is needed
	85	For MkLinux/LinuxPPC. */
	86
	87	#ifdef LINUX
	88	#define LINKER $(CC) -nostdlib
	89	#define LD_SWITCH_MACHINE -Xlinker -m -Xlinker elf32ppc
6acf9baf EZ	90	/* s/gnu-linux.h defines this to `-z nocombreloc' which does not work here
	91	because prefix-args is not used. */
	92	#undef LD_SWITCH_SYSTEM_TEMACS
	93	#define LD_SWITCH_MACHINE_TEMACS -Xlinker -znocombreloc
2c8a6e9e	94	#endif
274704f7	95
a74b48cf GM	96	#if 0 /* This breaks things on PPC GNU/Linux ecept for Yellowdog,
	97	even with identical GCC, as, ld. Let's take it out until we
	98	know what's really going on here. */
881aa09c GM	99	/* GCC 2.95 and newer on GNU/Linux PPC changed the load address to
	100	0x10000000. */
	101	#if defined __linux__
	102	#if __GNUC__ > 2 \|\| (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
274704f7 GM	103	#define DATA_SEG_BITS 0x10000000
274704f7 GM	104	#endif
881aa09c	105	#endif
a74b48cf	106	#endif /* 0 */
6b61353c KH	107
	108	/* arch-tag: 41913e4e-e7d1-4023-aadb-210cc31712ed
	109	(do not change this comment) */