465 lines
12 KiB
C
465 lines
12 KiB
C
/* $NetBSD: machdep.c,v 1.16 2011/08/24 19:03:02 macallan 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. 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>
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__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.16 2011/08/24 19:03:02 macallan Exp $");
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#include "opt_ddb.h"
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#include "opt_execfmt.h"
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#include "opt_modular.h"
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#include <sys/param.h>
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#include <sys/boot_flag.h>
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#include <sys/buf.h>
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#include <sys/cpu.h>
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#include <sys/device.h>
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#include <sys/kcore.h>
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#include <sys/kernel.h>
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#include <sys/ksyms.h>
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#include <sys/mount.h>
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#include <sys/reboot.h>
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#include <sys/systm.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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#include "ksyms.h"
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#if NKSYMS || defined(DDB) || defined(MODULAR)
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#include <mips/db_machdep.h>
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#include <ddb/db_extern.h>
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#endif
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#include <mips/locore.h>
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#include <mips/psl.h>
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#include <mips/bonito/bonitoreg.h>
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#include <evbmips/gdium/gdiumvar.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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struct gdium_config gdium_configuration = {
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.gc_bonito = {
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.bc_adbase = 11, /* magic */
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},
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};
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/* For sysctl_hw. */
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extern char cpu_model[];
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/* Maps for VM objects. */
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struct vm_map *phys_map = NULL;
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int netboot; /* Are we netbooting? */
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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 **, char **, void *);
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/*
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* For some reason, PMON doesn't assign a real address to the Ralink's BAR.
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* So we have to do it.
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*/
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static void
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gdium_pci_attach_hook(device_t parent, device_t self,
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struct pcibus_attach_args *pba)
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{
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const pcitag_t high_dev = pci_make_tag(pba->pba_pc, 0, 17, 1);
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const pcitag_t ralink_dev = pci_make_tag(pba->pba_pc, 0, 13, 0);
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bus_size_t high_size, ralink_size;
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pcireg_t v;
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/*
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* Get the highest PCI addr used from the last PCI dev.
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*/
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v = pci_conf_read(pba->pba_pc, high_dev, PCI_MAPREG_START);
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v &= PCI_MAPREG_MEM_ADDR_MASK;
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/*
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* Get the sizes of the map registers.
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*/
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pci_mapreg_info(pba->pba_pc, high_dev, PCI_MAPREG_START,
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PCI_MAPREG_MEM_TYPE_32BIT, NULL, &high_size, NULL);
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pci_mapreg_info(pba->pba_pc, ralink_dev, PCI_MAPREG_START,
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PCI_MAPREG_MEM_TYPE_32BIT, NULL, &ralink_size, NULL);
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/*
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* Position the ralink register space after the last device.
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*/
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v = (v + high_size + ralink_size - 1) & ~(ralink_size - 1);
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/*
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* Set the mapreg.
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*/
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pci_conf_write(pba->pba_pc, ralink_dev, PCI_MAPREG_START, v);
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#if 0
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/*
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* Why does linux do this?
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*/
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for (int dev = 15; dev <= 17; dev +=2) {
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for (int func = 0; func <= 1; func++) {
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pcitag_t usb_dev = pci_make_tag(pba->pba_pc, 0, dev, func);
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v = pci_conf_read(pba->pba_pc, usb_dev, 0xe0);
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v |= 3;
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pci_conf_write(pba->pba_pc, usb_dev, 0xe0, v);
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}
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}
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#endif
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}
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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, char **envp32, void *callvec)
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{
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struct gdium_config *gc = &gdium_configuration;
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void *kernend;
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#ifdef NOTYET
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char *cp;
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int howto;
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#endif
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int i;
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psize_t memsize;
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char *envp[128];
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int32_t *eptrs = (int32_t *)envp32;
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extern char edata[], end[];
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/*
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* Clear the BSS segment.
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*/
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kernend = (void *)mips_round_page(end);
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memset(edata, 0, (char *)kernend - edata);
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/*
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* the pointer array in envp32 is 32bit - we need to sign extend them
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* and put them into a list of actual pointers
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* Only strictly necessary on LP64 but it doesn't hurt in LP32, runs only
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* once at startup and I'd rather not pollute this file with another
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* #ifdef orgy
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*/
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i = 0;
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while ((eptrs[i] != 0) && (i < 128)) {
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envp[i] = (char *)(intptr_t)eptrs[i]; /* sign extend */
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i++;
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}
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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(NULL, false);
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/* set the VM page size */
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uvm_setpagesize();
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memsize = 256*1024*1024;
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physmem = btoc(memsize);
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bonito_pci_init(&gc->gc_pc, &gc->gc_bonito);
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/*
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* Override the null bonito_pci_attach_hook with our own to we can
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* fix the ralink (device 13).
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*/
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gc->gc_pc.pc_attach_hook = gdium_pci_attach_hook;
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gdium_bus_io_init(&gc->gc_iot, gc);
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gdium_bus_mem_init(&gc->gc_memt, gc);
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gdium_dma_init(gc);
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gdium_cnattach(gc);
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/*
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* Disable the 2nd PCI window since we don't need it.
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*/
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mips3_sd((uint64_t *)MIPS_PHYS_TO_KSEG1(BONITO_REGBASE + 0x158), 0xe);
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pci_conf_write(&gc->gc_pc, pci_make_tag(&gc->gc_pc, 0, 0, 0), 18, 0);
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/*
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* Get the timer from PMON.
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*/
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for (i = 0; envp[i] != NULL; i++) {
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if (!strncmp(envp[i], "cpuclock=", 9)) {
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curcpu()->ci_cpu_freq =
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strtoul(&envp[i][9], NULL, 10);
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break;
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}
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}
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if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
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curcpu()->ci_cpu_freq /= 2;
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/* Compute the number of ticks for hz. */
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curcpu()->ci_cycles_per_hz = (curcpu()->ci_cpu_freq + hz / 2) / hz;
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/* Compute the delay divisor. */
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curcpu()->ci_divisor_delay =
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((curcpu()->ci_cpu_freq + 500000) / 1000000);
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/*
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* Get correct cpu frequency if the CPU runs at twice the
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* external/cp0-count frequency.
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*/
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if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
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curcpu()->ci_cpu_freq *= 2;
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#ifdef DEBUG
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printf("Timer calibration: %lu cycles/sec\n",
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curcpu()->ci_cpu_freq);
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#endif
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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(&gc->gc_iot, MALTA_UART0ADR, comcnrate,
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COM_FREQ, COM_TYPE_NORMAL,
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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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#endif /* NCOM > 0 */
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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, "Gdium Liberty 1000");
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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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#ifdef NOTYET
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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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#endif
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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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mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend,
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mem_clusters, mem_cluster_cnt, NULL, 0);
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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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pmap_bootstrap();
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/*
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* Allocate uarea page for lwp0 and set it.
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*/
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mips_init_lwp0_uarea();
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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 defined(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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}
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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(void)
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{
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/*
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* Do the common startup items.
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*/
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cpu_startup_common();
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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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gdium_configuration.gc_mallocsafe = 1;
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}
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int waittime = -1;
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void
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cpu_reboot(int howto, char *bootstr)
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{
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/* Take a snapshot before clobbering any registers. */
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savectx(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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pmf_system_shutdown(boothowto);
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if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
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/*
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* Turning on GPIO1 as output will cause a powerdown.
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*/
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REGVAL(BONITO_GPIODATA) |= 2;
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REGVAL(BONITO_GPIOIE) &= ~2;
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}
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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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/*
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* Turning off GPIO2 as output will cause a reset.
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*/
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REGVAL(BONITO_GPIODATA) &= ~4;
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REGVAL(BONITO_GPIOIE) &= ~4;
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__asm__ __volatile__ (
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"\t.long 0x3c02bfc0\n"
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"\t.long 0x00400008\n"
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::: "v0");
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}
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