Determine FPU type during autoconfig.
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gwr
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dd6089fc52
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d57d569cad
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@ -1,4 +1,4 @@
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# $NetBSD: files.sun3.newconf,v 1.23 1995/03/10 02:31:35 gwr Exp $
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# $NetBSD: files.sun3.newconf,v 1.24 1995/03/24 17:27:12 gwr Exp $
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#
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# sun3-specific configuration info
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@ -29,15 +29,20 @@ file arch/m68k/fpe/fpu_emulate.c fpu_emulate
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file arch/m68k/m68k/copy.s
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file dev/cons.c
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#
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# Declare our "catch-all" root node.
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device mainbus at root {}
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# Misc. mainbus things (catch-all)
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# Control space hack
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device obctl at mainbus {addr = -1, [level = -1]}
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# Floating Point Unit
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device fpu at mainbus {}
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file arch/sun3/sun3/fpu.c fpu
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# Bus types
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#
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# The implementation of the bus_* functions in autoconfig.c
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# requires these all to agree with <autoconf.h> struct bus_loc
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#
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device mainbus at root {}
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# Control space hack
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device obctl at mainbus {addr = -1, [level = -1]}
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# On-board MEMory space
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device obmem at mainbus {addr = -1, [level = -1]}
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# On-board I/O space
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@ -1,12 +1,15 @@
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# $NetBSD: std.sun3,v 1.11 1995/02/11 21:01:21 gwr Exp $
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# $NetBSD: std.sun3,v 1.12 1995/03/24 17:27:15 gwr Exp $
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# Standard information for sun3's.
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machine sun3 m68k
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# The root node:
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mainbus0 at root
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# control space hack...
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obctl0 at mainbus?
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fpu0 at mainbus?
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# main memory
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obmem0 at mainbus?
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# device space
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@ -0,0 +1,135 @@
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/* $NetBSD: fpu.c,v 1.1 1995/03/24 17:27:37 gwr Exp $ */
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/*
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* Copyright (c) 1995 Gordon W. Ross
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* 4. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Gordon Ross
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Floating Point Unit (MC68881)
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* Probe for the FPU at autoconfig time.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <machine/autoconf.h>
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#include <machine/psl.h>
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#include <machine/cpu.h>
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#include <machine/frame.h>
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#include <machine/mon.h>
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#include <machine/control.h>
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#include <setjmp.h>
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#include "interreg.h"
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extern int fpu_type;
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extern int *nofault;
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int fpu_match __P((struct device *, void *vcf, void *args));
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void fpu_attach __P((struct device *, struct device *, void *));
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int fpu_probe();
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struct cfdriver fpucd = {
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NULL, "fpu", fpu_match, fpu_attach,
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DV_DULL, sizeof(struct device), 0 };
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int fpu_match(parent, vcf, args)
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struct device *parent;
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void *vcf, *args;
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{
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struct cfdata *cf = vcf;
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struct confargs *ca = args;
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/* This driver only supports one unit. */
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if (cf->cf_unit != 0)
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return (0);
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return (1);
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}
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static char *fpu_descr[] = {
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#ifdef FPU_EMULATE
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"emulator", /* 0 */
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#else
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"no math support", /* 0 */
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#endif
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"mc68881", /* 1 */
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"mc68882", /* 2 */
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"?" };
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void fpu_attach(parent, self, args)
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struct device *parent;
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struct device *self;
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void *args;
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{
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struct confargs *ca = args;
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char *descr;
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int enab_reg;
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/* Set the FPU bit in the "system enable register" */
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enab_reg = get_control_byte((char *) SYSTEM_ENAB);
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enab_reg |= SYSTEM_ENAB_FPP;
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set_control_byte((char *) SYSTEM_ENAB, enab_reg);
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fpu_type = fpu_probe();
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if ((0 <= fpu_type) && (fpu_type <= 2))
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descr = fpu_descr[fpu_type];
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else
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descr = "unknown type";
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printf(" (%s)\n", descr);
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if (fpu_type == 0) {
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/* Might as well turn the enable bit back off. */
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enab_reg = get_control_byte((char *) SYSTEM_ENAB);
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enab_reg &= ~SYSTEM_ENAB_FPP;
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set_control_byte((char *) SYSTEM_ENAB, enab_reg);
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}
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}
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int fpu_probe()
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{
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jmp_buf faultbuf;
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int null_fpframe[2];
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nofault = (int *) &faultbuf;
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if (setjmp(nofault)) {
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nofault = (int *) 0;
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return(0);
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}
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null_fpframe[0] = 0;
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null_fpframe[1] = 0;
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m68881_restore(null_fpframe);
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nofault = (int *) 0;
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return(1);
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: locore2.c,v 1.34 1995/02/13 22:24:26 gwr Exp $ */
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/* $NetBSD: locore2.c,v 1.35 1995/03/24 17:27:44 gwr Exp $ */
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/*
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* Copyright (c) 1994 Gordon W. Ross
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@ -77,13 +77,6 @@ unsigned char cpu_machine_id = 0;
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char *cpu_string = NULL;
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int cpu_has_vme = 0;
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/* XXX - Need real code to do this at startup. */
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#ifdef FPCOPROC
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int fpu_type = 1; /* XXX */
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#else
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int fpu_type = 0; /* XXX */
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#endif
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vm_offset_t high_segment_free_start = 0;
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vm_offset_t high_segment_free_end = 0;
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@ -760,18 +753,6 @@ void internal_configure()
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clock_init();
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}
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/* XXX - Move this into a real device driver. */
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void fpu_init()
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{
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int enab_reg;
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if (fpu_type) {
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enab_reg = get_control_byte((char *) SYSTEM_ENAB);
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enab_reg |= SYSTEM_ENAB_FPP;
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set_control_byte((char *) SYSTEM_ENAB, enab_reg);
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}
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}
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/*
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* This is called from locore.s just after the kernel is remapped
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* to its proper address, but before the call to main().
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@ -804,7 +785,4 @@ sun3_bootstrap()
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* it will not cause "spurrious level 7" complaints.
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*/
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initialize_vector_table();
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/* XXX - Move this into a real device driver. */
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fpu_init();
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: machdep.c,v 1.47 1995/03/10 02:24:42 gwr Exp $ */
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/* $NetBSD: machdep.c,v 1.48 1995/03/24 17:27:41 gwr Exp $ */
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/*
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* Copyright (c) 1994 Gordon W. Ross
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@ -99,10 +99,11 @@
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#include <setjmp.h>
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extern char *cpu_string;
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extern int fpu_type;
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int physmem;
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int cold;
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int fpu_type;
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/*
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* safepri is a safe priority for sleep to set for a spin-wait
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* during autoconfiguration or after a panic.
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@ -1,4 +1,4 @@
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/* $NetBSD: sun3_startup.c,v 1.34 1995/02/13 22:24:26 gwr Exp $ */
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/* $NetBSD: sun3_startup.c,v 1.35 1995/03/24 17:27:44 gwr Exp $ */
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/*
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* Copyright (c) 1994 Gordon W. Ross
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@ -77,13 +77,6 @@ unsigned char cpu_machine_id = 0;
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char *cpu_string = NULL;
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int cpu_has_vme = 0;
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/* XXX - Need real code to do this at startup. */
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#ifdef FPCOPROC
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int fpu_type = 1; /* XXX */
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#else
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int fpu_type = 0; /* XXX */
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#endif
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vm_offset_t high_segment_free_start = 0;
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vm_offset_t high_segment_free_end = 0;
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@ -760,18 +753,6 @@ void internal_configure()
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clock_init();
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}
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/* XXX - Move this into a real device driver. */
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void fpu_init()
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{
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int enab_reg;
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if (fpu_type) {
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enab_reg = get_control_byte((char *) SYSTEM_ENAB);
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enab_reg |= SYSTEM_ENAB_FPP;
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set_control_byte((char *) SYSTEM_ENAB, enab_reg);
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}
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}
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/*
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* This is called from locore.s just after the kernel is remapped
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* to its proper address, but before the call to main().
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@ -804,7 +785,4 @@ sun3_bootstrap()
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* it will not cause "spurrious level 7" complaints.
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*/
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initialize_vector_table();
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/* XXX - Move this into a real device driver. */
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fpu_init();
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}
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