484 lines
13 KiB
C
484 lines
13 KiB
C
/* $NetBSD: machdep.c,v 1.7 2002/08/25 20:21:36 thorpej Exp $ */
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/*
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* Copyright 2001, 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe and Simon Burge for Wasabi Systems, 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. 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 for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, 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 WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND 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) 1988 University of Utah.
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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. 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 "opt_ddb.h"
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#include "opt_execfmt.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 <uvm/uvm_extern.h>
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#include <dev/cons.h>
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#ifdef DDB
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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 <machine/cpu.h>
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#include <machine/psl.h>
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#include <machine/yamon.h>
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#include <evbmips/malta/autoconf.h>
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#include <evbmips/malta/maltareg.h>
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#include <evbmips/malta/maltavar.h>
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#include "com.h"
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#if NCOM > 0
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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int comcnrate = 38400; /* XXX should be config option */
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#endif /* NCOM > 0 */
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#define REGVAL(x) *((__volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x))))
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struct malta_config malta_configuration;
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/* For sysctl_hw. */
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extern char cpu_model[];
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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; /* Total physical memory */
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int netboot; /* Are we netbooting? */
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yamon_env_var *yamon_envp;
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phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
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int mem_cluster_cnt;
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void configure(void);
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void mach_init(int, char **, yamon_env_var *, u_long);
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/*
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* safepri is a safe priority for sleep to set for a spin-wait during
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* autoconfiguration or after a panic. Used as an argument to splx().
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*/
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int safepri = MIPS1_PSL_LOWIPL;
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extern struct user *proc0paddr;
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/*
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* Do all the stuff that locore normally does before calling main().
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*/
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void
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mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize)
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{
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struct malta_config *mcp = &malta_configuration;
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bus_space_handle_t sh;
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caddr_t kernend, v;
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u_long first, last;
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vsize_t size;
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char *cp;
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int i, howto;
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uint8_t *brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES);
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extern char edata[], end[];
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*brkres = 0; /* Disable BREAK==reset on console */
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/* Get the propaganda in early! */
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led_display_str("NetBSD");
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/*
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* Clear the BSS segment.
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*/
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kernend = (caddr_t)mips_round_page(end);
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memset(edata, 0, kernend - edata);
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/* save the yamon environment pointer */
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yamon_envp = envp;
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/* Use YAMON callbacks for early console I/O */
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cn_tab = &yamon_promcd;
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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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* Also clears the I+D caches.
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*/
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mips_vector_init();
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/* set the VM page size */
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uvm_setpagesize();
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physmem = btoc(memsize);
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gt_pci_init(&mcp->mc_pc, &mcp->mc_gt);
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malta_bus_io_init(&mcp->mc_iot, mcp);
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malta_bus_mem_init(&mcp->mc_memt, mcp);
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malta_dma_init(mcp);
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/*
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* Calibrate the timer, delay() relies on this.
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*/
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bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh);
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malta_cal_timer(&mcp->mc_iot, sh);
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bus_space_unmap(&mcp->mc_iot, sh, 2);
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#if NCOM > 0
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/*
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* Delay to allow firmware putchars to complete.
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* FIFO depth * character time.
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* character time = (1000000 / (defaultrate / 10))
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*/
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delay(160000000 / comcnrate);
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if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate, COM_FREQ,
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(TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0)
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panic("malta: unable to initialize serial console");
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#else
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panic("malta: not configured to use serial console");
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#endif /* NCOM > 0 */
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consinit();
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mem_clusters[0].start = 0;
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mem_clusters[0].size = ctob(physmem);
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mem_cluster_cnt = 1;
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strcpy(cpu_model, "MIPS Malta Evaluation Board");
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/*
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* XXX: check argv[0] - do something if "gdb"???
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*/
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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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for (i = 1; i < argc; i++) {
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for (cp = argv[i]; *cp; cp++) {
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/* Ignore superfluous '-', if there is one */
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if (*cp == '-')
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continue;
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howto = 0;
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BOOT_FLAG(*cp, howto);
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if (! howto)
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printf("bootflag '%c' not recognised\n", *cp);
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else
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boothowto |= howto;
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}
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}
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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 error 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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* Compute the size of system data structures. pmap_bootstrap()
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* needs some of this information.
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*/
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size = (vsize_t)allocsys(NULL, NULL);
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pmap_bootstrap();
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/*
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* Allocate space for proc0's USPACE.
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*/
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v = (caddr_t)uvm_pageboot_alloc(USPACE);
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proc0.p_addr = proc0paddr = (struct user *)v;
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proc0.p_md.md_regs = (struct frame *)(v + USPACE) - 1;
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curpcb = &proc0.p_addr->u_pcb;
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curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */
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/*
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* Allocate space for system data structures. These data structures
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* are allocated here instead of cpu_startup() because physical
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* memory is directly addressable. We don't have to map these into
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* virtual address space.
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*/
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v = (caddr_t)uvm_pageboot_alloc(size);
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if ((allocsys(v, NULL) - v) != size)
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panic("mach_init: table size inconsistency");
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/*
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* Initialize debuggers, and break into them, if appropriate.
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*/
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#ifdef DDB
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ddb_init(0, 0, 0);
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#endif
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if (boothowto & RB_KDB)
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#if defined(DDB)
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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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}
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/*
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* Allocate memory for variable-sized tables,
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*/
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void
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cpu_startup()
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{
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u_int i, base, residual;
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vaddr_t minaddr, maxaddr;
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vsize_t size;
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char pbuf[9];
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/*
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* Good {morning,afternoon,evening,night}.
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*/
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printf(version);
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format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
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printf("%s memory", pbuf);
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/*
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* Virtual memory is bootstrapped -- notify the bus spaces
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* that memory allocation is now safe.
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*/
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malta_configuration.mc_mallocsafe = 1;
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/*
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* Allocate virtual address space for file I/O buffers.
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* Note they are different than the array of headers, 'buf',
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* and usually occupy more virtual memory than physical.
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*/
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size = MAXBSIZE * nbuf;
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if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(size),
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NULL, UVM_UNKNOWN_OFFSET, 0,
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UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
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UVM_ADV_NORMAL, 0)) != 0)
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panic("startup: cannot allocate VM for buffers");
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minaddr = (vaddr_t)buffers;
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base = bufpages / nbuf;
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residual = bufpages % nbuf;
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for (i = 0; i < nbuf; i++) {
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vsize_t curbufsize;
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vaddr_t curbuf;
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struct vm_page *pg;
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/*
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* Each buffer has MAXBSIZE bytes of VM space allocated. Of
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* that MAXBSIZE space, we allocate and map (base+1) pages
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* for the first "residual" buffers, and then we allocate
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* "base" pages for the rest.
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*/
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curbuf = (vaddr_t) buffers + (i * MAXBSIZE);
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curbufsize = NBPG * ((i < residual) ? (base + 1) : base);
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while (curbufsize) {
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pg = uvm_pagealloc(NULL, 0, NULL, 0);
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if (pg == NULL)
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panic("cpu_startup: not enough memory for "
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"buffer cache");
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pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg),
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VM_PROT_READ|VM_PROT_WRITE);
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curbuf += PAGE_SIZE;
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curbufsize -= PAGE_SIZE;
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}
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}
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pmap_update(pmap_kernel());
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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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format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
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printf(", %s free", pbuf);
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format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG);
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printf(", %s in %u buffers\n", pbuf, nbuf);
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/*
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* Set up buffers, so they can be used to read disk labels.
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*/
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bufinit();
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}
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int waittime = -1;
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void
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cpu_reboot(howto, bootstr)
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int howto;
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char *bootstr;
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{
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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 (cold) {
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howto |= RB_HALT;
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goto haltsys;
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}
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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 ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
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waittime = 0;
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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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splhigh();
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if (howto & RB_DUMP)
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dumpsys();
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haltsys:
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doshutdownhooks();
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if (howto & 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("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting...");
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yamon_exit(boothowto);
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printf("Oops, back from yamon_exit()\n\nResetting...");
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REGVAL(MALTA_SOFTRES) = MALTA_GORESET;
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/*
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* Need a small delay here, otherwise we see the first few characters of
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* the warning below.
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*/
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delay(80000);
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printf("WARNING: reset failed!\nSpinning...");
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for (;;)
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/* spin forever */ ; /* XXX */
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}
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