40f5425d58
mips struct cpu_info and related macroes. The member was prepared for a hack in MD microtime(9) implementation but it has been superseded by MI timecounter(9).
485 lines
15 KiB
C
485 lines
15 KiB
C
/* $NetBSD: machdep.c,v 1.12 2008/05/26 15:59:29 tsutsui Exp $ */
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/*
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* Copyright (c) 2006 Urbana-Champaign Independent Media Center.
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* Copyright (c) 2006 Garrett D'Amore.
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* All rights reserved.
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*
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* Portions of this code were written by Garrett D'Amore for the
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* Champaign-Urbana Community Wireless Network Project.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions 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
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgements:
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* This product includes software developed by the Urbana-Champaign
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* Independent Media Center.
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* This product includes software developed by Garrett D'Amore.
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* 4. Urbana-Champaign Independent Media Center's name and Garrett
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* D'Amore's name 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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*
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* THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
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* MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT
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* MEDIA CENTER OR GARRETT D'AMORE 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;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 2006 Itronix Inc.
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* All rights reserved.
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*
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* Portions written by Garrett D'Amore for Itronix Inc.
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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 Itronix Inc. may not be used to endorse
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* or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department, The Mach Operating System project at
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* Carnegie-Mellon University and Ralph Campbell.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)machdep.c 8.3 (Berkeley) 1/12/94
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* from: Utah Hdr: machdep.c 1.63 91/04/24
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*/
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/*
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* Copyright (c) 1988 University of Utah.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department, The Mach Operating System project at
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* Carnegie-Mellon University and Ralph Campbell.
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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. 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 the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)machdep.c 8.3 (Berkeley) 1/12/94
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* from: Utah Hdr: machdep.c 1.63 91/04/24
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.12 2008/05/26 15:59:29 tsutsui Exp $");
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#include "opt_ddb.h"
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#include "opt_kgdb.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/buf.h>
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#include <sys/reboot.h>
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#include <sys/user.h>
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#include <sys/mount.h>
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#include <sys/kcore.h>
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#include <sys/boot_flag.h>
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#include <sys/termios.h>
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#include <sys/ksyms.h>
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#include <uvm/uvm_extern.h>
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#include <dev/cons.h>
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#include "ksyms.h"
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#if NKSYMS || defined(DDB) || defined(LKM)
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#include <machine/db_machdep.h>
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#include <ddb/db_extern.h>
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#endif
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#include <mips/cache.h>
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#include <mips/locore.h>
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#include <mips/cpuregs.h>
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#include <mips/atheros/include/ar531xvar.h>
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#include <mips/atheros/include/arbusvar.h>
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struct user *proc0paddr;
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/* Our exported CPU info; we can have only one. */
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struct cpu_info cpu_info_store;
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/* Maps for VM objects. */
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struct vm_map *exec_map = NULL;
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struct vm_map *mb_map = NULL;
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struct vm_map *phys_map = NULL;
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int physmem; /* # pages of physical memory */
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int maxmem; /* max memory per process */
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int mem_cluster_cnt;
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phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
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void mach_init(void); /* XXX */
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static void
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cal_timer(void)
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{
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uint32_t cntfreq;
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cntfreq = curcpu()->ci_cpu_freq = ar531x_cpu_freq();
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/* MIPS 4Kc CP0 counts every other clock */
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if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
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cntfreq /= 2;
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curcpu()->ci_cycles_per_hz = (cntfreq + hz / 2) / hz;
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/* Compute number of cycles per 1us (1/MHz). 0.5MHz is for roundup. */
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curcpu()->ci_divisor_delay = ((cntfreq + 500000) / 1000000);
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}
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void
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mach_init(void)
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{
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void *kernend;
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u_long first, last;
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void * v;
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uint32_t memsize;
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extern char edata[], end[]; /* XXX */
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/* clear the BSS segment */
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kernend = (void *)mips_round_page(end);
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memset(edata, 0, (char *)kernend - edata);
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/* setup early console */
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ar531x_early_console();
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/* set CPU model info for sysctl_hw */
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snprintf(cpu_model, 64, "%s", ar531x_cpuname());
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/*
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* Set up the exception vectors and CPU-specific function
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* vectors early on. We need the wbflush() vector set up
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* before comcnattach() is called (or at least before the
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* first printf() after that is called).
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* Sets up mips_cpu_flags that may be queried by other
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* functions called during startup.
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* Also clears the I+D caches.
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*/
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mips_vector_init();
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/*
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* Calibrate timers.
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*/
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cal_timer();
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/*
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* Set the VM page size.
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*/
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uvm_setpagesize();
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/*
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* Look at arguments passed to us and compute boothowto.
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*/
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boothowto = RB_AUTOBOOT;
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#ifdef KADB
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boothowto |= RB_KDB;
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#endif
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/*
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* This would be a good place to parse a boot command line, if
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* we got one from the bootloader. Right now we have no way to
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* get one from e.g. vxworks.
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*/
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/*
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* Determine the memory size.
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*
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* Note: Reserve the first page! That's where the trap
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* vectors are located.
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*/
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memsize = ar531x_memsize();
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printf("Memory size: 0x%08x\n", memsize);
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physmem = btoc(memsize);
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mem_clusters[mem_cluster_cnt].start = PAGE_SIZE;
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mem_clusters[mem_cluster_cnt].size =
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memsize - mem_clusters[mem_cluster_cnt].start;
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mem_cluster_cnt++;
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/*
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* Load the rest of the available pages into the VM system.
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*/
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first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
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last = mem_clusters[0].start + mem_clusters[0].size;
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uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
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VM_FREELIST_DEFAULT);
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/*
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* Initialize message buffer (at end of core).
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*/
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mips_init_msgbuf();
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/*
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* Initialize the virtual memory system.
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*/
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pmap_bootstrap();
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/*
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* Init mapping for u page(s) for proc0.
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*/
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v = (void *) uvm_pageboot_alloc(USPACE);
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lwp0.l_addr = proc0paddr = (struct user *)v;
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lwp0.l_md.md_regs = (struct frame *)((char *)v + USPACE) - 1;
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proc0paddr->u_pcb.pcb_context[11] =
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MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */
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/*
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* Initialize busses.
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*/
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ar531x_businit();
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/*
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* Turn off (ignore) the hardware watchdog. If we got this
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* far, then we shouldn't need it anymore.
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*/
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ar531x_wdog(0);
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/*
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* Turn off watchpoint that may have been enabled by the
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* PROM. VxWorks bootloader seems to leave one set.
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*/
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__asm volatile (
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"mtc0 $0, $" ___STRING(MIPS_COP_0_WATCH_LO) " \n\t"
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"nop\n\t"
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"nop\n\t");
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/*
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* Initialize debuggers, and break into them, if appropriate.
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*/
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#if NKSYMS || defined(DDB) || defined(LKM)
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ksyms_init(0, 0, 0);
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#endif
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#ifdef DDB
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if (boothowto & RB_KDB)
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Debugger();
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#endif
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}
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void
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consinit(void)
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{
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/*
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* Everything related to console initialization is done
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* in mach_init().
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*/
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ar531x_consinit();
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}
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void
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cpu_startup(void)
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{
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char pbuf[9];
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vaddr_t minaddr, maxaddr;
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#ifdef DEBUG
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extern int pmapdebug; /* XXX */
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int opmapdebug = pmapdebug;
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pmapdebug = 0; /* Shut up pmap debug during bootstrap */
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#endif
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/*
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* Good {morning,afternoon,evening,night}.
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*/
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printf("%s%s", copyright, version);
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printf("%s\n", cpu_model);
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format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
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printf("total memory = %s\n", pbuf);
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minaddr = 0;
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/*
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* Allocate a submap for exec arguments. This map effectively
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* limits the number of processes exec'ing at any time.
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*/
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exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
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16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);
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/*
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* Allocate a submap for physio
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*/
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phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
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VM_PHYS_SIZE, 0, FALSE, NULL);
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/*
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* No need to allocate an mbuf cluster submap. Mbuf clusters
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* are allocated via the pool allocator, and we use KSEG to
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* map those pages.
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*/
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#ifdef DEBUG
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pmapdebug = opmapdebug;
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#endif
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format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
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printf("avail memory = %s\n", pbuf);
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}
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void
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cpu_reboot(int howto, char *bootstr)
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{
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static int waittime = -1;
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/* Take a snapshot before clobbering any registers. */
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if (curproc)
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savectx((struct user *)curpcb);
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/* If "always halt" was specified as a boot flag, obey. */
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if (boothowto & RB_HALT)
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howto |= RB_HALT;
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boothowto = howto;
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/* If system is cold, just halt. */
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if (cold) {
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boothowto |= RB_HALT;
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goto haltsys;
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}
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if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) {
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waittime = 0;
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/*
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* Synchronize the disks....
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*/
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vfs_shutdown();
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/*
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* If we've been adjusting the clock, the todr
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* will be out of synch; adjust it now.
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*/
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resettodr();
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}
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/* Disable interrupts. */
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splhigh();
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if (boothowto & RB_DUMP)
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dumpsys();
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haltsys:
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/* Run any shutdown hooks. */
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doshutdownhooks();
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#if 0
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if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN)
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if (board && board->ab_poweroff)
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board->ab_poweroff();
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#endif
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/*
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* Firmware may autoboot (depending on settings), and we cannot pass
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* flags to it (at least I haven't figured out how to yet), so
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* we "pseudo-halt" now.
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*/
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if (boothowto & RB_HALT) {
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printf("\n");
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printf("The operating system has halted.\n");
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printf("Please press any key to reboot.\n\n");
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cnpollc(1); /* For proper keyboard command handling */
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cngetc();
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cnpollc(0);
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}
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printf("reseting board...\n\n");
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mips_icache_sync_all();
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mips_dcache_wbinv_all();
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__asm volatile("jr %0" :: "r"(MIPS_RESET_EXC_VEC));
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printf("Oops, back from reset\n\nSpinning...");
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for (;;)
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/* spin forever */ ; /* XXX */
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/*NOTREACHED*/
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}
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