/* $OpenBSD: autoconf.c,v 1.43 2007/06/01 19:25:09 deraadt Exp $ */
/* $NetBSD: autoconf.c,v 1.45 1999/04/10 17:31:02 kleink Exp $ */
/*
* Copyright (c) 1996 Jason R. Thorpe. All rights reserved.
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: Utah $Hdr: autoconf.c 1.36 92/12/20$
*
* @(#)autoconf.c 8.2 (Berkeley) 1/12/94
*/
/*
* Setup the system to run on the current machine.
*
* cpu_configure() is called at boot time. Available
* devices are determined (from possibilities mentioned in ioconf.c),
* and the drivers are initialized.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/malloc.h>
#include <sys/extent.h>
#include <sys/mount.h>
#include <sys/queue.h>
#include <sys/reboot.h>
#include <sys/tty.h>
#include <dev/cons.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/vmparam.h>
#include <machine/cpu.h>
#include <machine/hp300spu.h>
#include <machine/intr.h>
#include <machine/pte.h>
#include <hp300/dev/dioreg.h>
#include <hp300/dev/diovar.h>
#include <hp300/dev/diodevs.h>
#include <hp300/dev/dmavar.h>
#include <hp300/dev/hpibvar.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <uvm/uvm_extern.h>
/*
* The following several variables are related to
* the configuration process, and are used in initializing
* the machine.
*/
struct extent *extio;
extern caddr_t internalhpib;
extern char *extiobase;
/* The boot device. */
struct device *bootdv;
/* The device we mount as root. */
struct device *root_device;
/* How we were booted. */
u_int bootdev;
/*
* This information is built during the autoconfig process.
* A little explanation about the way this works is in order.
*
* device_register() links all devices into dev_data_list.
* If the device is an hpib controller, it is also linked
* into dev_data_list_hpib. If the device is a scsi controller,
* it is also linked into dev_data_list_scsi.
*
* dev_data_list_hpib and dev_data_list_scsi are sorted
* by select code, from lowest to highest.
*
* After autoconfiguration is complete, we need to determine
* which device was the boot device. The boot block assigns
* controller unit numbers in order of select code. Thus,
* providing the controller is configured in the kernel, we
* can determine our version of controller unit number from
* the sorted hpib/scsi list.
*
* At this point, we know the controller (device type
* encoded in bootdev tells us "scsi disk", or "hpib tape",
* etc.). The next step is to find the device which
* has the following properties:
*
* - A child of the boot controller.
* - Same slave as encoded in bootdev.
* - Same physical unit as encoded in bootdev.
*
* Later, after we've set the root device in stone, we
* reverse the process to re-encode bootdev so it can be
* passed back to the boot block.
*/
struct dev_data {
LIST_ENTRY(dev_data) dd_list; /* dev_data_list */
LIST_ENTRY(dev_data) dd_clist; /* ctlr list */
struct device *dd_dev; /* device described by this entry */
int dd_scode; /* select code of device */
int dd_slave; /* ...or slave */
int dd_punit; /* and punit... */
};
typedef LIST_HEAD(, dev_data) ddlist_t;
ddlist_t dev_data_list; /* all dev_datas */
ddlist_t dev_data_list_hpib; /* hpib controller dev_datas */
ddlist_t dev_data_list_scsi; /* scsi controller dev_datas */
void findbootdev(void);
void findbootdev_slave(ddlist_t *, int, int, int);
void setbootdev(void);
static struct dev_data *dev_data_lookup(struct device *);
static void dev_data_insert(struct dev_data *, ddlist_t *);
static int device_match(const char *, const char *);
int mainbusmatch(struct device *, void *, void *);
void mainbusattach(struct device *, struct device *, void *);
int mainbussearch(struct device *, void *, void *);
struct cfattach mainbus_ca = {
sizeof(struct device), mainbusmatch, mainbusattach
};
struct cfdriver mainbus_cd = {
NULL, "mainbus", DV_DULL
};
int
mainbusmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
static int mainbus_matched = 0;
/* Allow only one instance. */
if (mainbus_matched)
return (0);
mainbus_matched = 1;
return (1);
}
void
mainbusattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
printf("\n");
/* Search for and attach children. */
config_search(mainbussearch, self, NULL);
}
int
mainbussearch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct cfdata *cf = match;
if ((*cf->cf_attach->ca_match)(parent, cf, NULL) > 0)
config_attach(parent, cf, NULL, NULL);
return (0);
}
/*
* Determine the device configuration for the running system.
*/
void
cpu_configure()
{
/*
* Initialize the dev_data_lists.
*/
LIST_INIT(&dev_data_list);
LIST_INIT(&dev_data_list_hpib);
LIST_INIT(&dev_data_list_scsi);
(void)splhigh();
if (config_rootfound("mainbus", "mainbus") == NULL)
panic("no mainbus found");
(void)spl0();
intr_printlevels();
/*
* Find boot device.
*/
if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
printf("WARNING: boot program didn't supply boot device.\n");
printf("Please update your boot program.\n");
} else {
findbootdev();
if (bootdv == NULL) {
printf("WARNING: can't find match for bootdev:\n");
printf(
"type = %d, ctlr = %d, slave = %d, punit = %d, part = %d\n",
B_TYPE(bootdev), B_ADAPTOR(bootdev),
B_CONTROLLER(bootdev), B_UNIT(bootdev),
B_PARTITION(bootdev));
bootdev = 0; /* invalidate bootdev */
} else {
printf("boot device: %s\n", bootdv->dv_xname);
}
}
cold = 0;
}
void
diskconf(void)
{
int bootpartition = 0;
/*
* If bootdev is bogus, ask the user anyhow.
*/
if (bootdev == 0)
boothowto |= RB_ASKNAME;
else
bootpartition = B_PARTITION(bootdev);
/*
* If we booted from tape, ask the user.
*/
if (bootdv != NULL && bootdv->dv_class == DV_TAPE)
boothowto |= RB_ASKNAME;
setroot(bootdv, bootpartition, RB_USERREQ);
dumpconf();
/*
* Set bootdev based on the device we booted from.
* This is given to the boot program when we reboot.
*/
setbootdev();
}
/**********************************************************************
* Code to find and set the boot device
**********************************************************************/
static int
device_match(const char *dvname, const char *template)
{
size_t len = strlen(template);
char unit;
if (strncmp(dvname, template, len) != 0)
return (1);
/* Check that we are immediately followed by an unit number. */
unit = dvname[len];
if (unit < '0' || unit > '9')
return (1);
return (0);
}
/*
* Register a device. We're passed the device and the arguments
* used to attach it. This is used to find the boot device.
*/
void
device_register(dev, aux)
struct device *dev;
void *aux;
{
struct dev_data *dd;
static int seen_netdevice = 0;
/*
* Allocate a dev_data structure and fill it in.
* This means making some tests twice, but we don't
* care; this doesn't really have to be fast.
*
* Note that we only really care about devices that
* we can mount as root.
*/
dd = (struct dev_data *)malloc(sizeof(struct dev_data),
M_DEVBUF, M_NOWAIT);
if (dd == NULL)
panic("device_register: can't allocate dev_data");
bzero(dd, sizeof(struct dev_data));
dd->dd_dev = dev;
/*
* BOOTROM and boot program can really only understand
* using the lowest select code network interface,
* so we ignore all but the first.
*/
if (dev->dv_class == DV_IFNET && seen_netdevice == 0) {
struct dio_attach_args *da = aux;
seen_netdevice = 1;
dd->dd_scode = da->da_scode;
goto linkup;
}
if (device_match(dev->dv_xname, "fhpib") == 0 ||
device_match(dev->dv_xname, "nhpib") == 0 ||
device_match(dev->dv_xname, "spc") == 0) {
struct dio_attach_args *da = aux;
dd->dd_scode = da->da_scode;
goto linkup;
}
if (device_match(dev->dv_xname, "hd") == 0) {
struct hpibbus_attach_args *ha = aux;
dd->dd_slave = ha->ha_slave;
dd->dd_punit = ha->ha_punit;
goto linkup;
}
if (device_match(dev->dv_xname, "cd") == 0 ||
device_match(dev->dv_xname, "sd") == 0 ||
device_match(dev->dv_xname, "st") == 0) {
struct scsi_attach_args *sa = aux;
dd->dd_slave = sa->sa_sc_link->target;
dd->dd_punit = sa->sa_sc_link->lun;
goto linkup;
}
/*
* Didn't need the dev_data.
*/
free(dd, M_DEVBUF);
return;
linkup:
LIST_INSERT_HEAD(&dev_data_list, dd, dd_list);
if (device_match(dev->dv_xname, "fhpib") == 0 ||
device_match(dev->dv_xname, "nhpib") == 0) {
dev_data_insert(dd, &dev_data_list_hpib);
return;
}
if (device_match(dev->dv_xname, "spc") == 0) {
dev_data_insert(dd, &dev_data_list_scsi);
return;
}
}
void
findbootdev()
{
int type, ctlr, slave, punit;
int scsiboot, hpibboot, netboot;
struct dev_data *dd;
bootdv = NULL;
if ((bootdev & B_MAGICMASK) != B_DEVMAGIC)
return;
type = B_TYPE(bootdev);
ctlr = B_ADAPTOR(bootdev);
slave = B_CONTROLLER(bootdev);
punit = B_UNIT(bootdev);
scsiboot = (type == 4); /* sd major */
hpibboot = (type == 0 || type == 2); /* ct/hd major */
netboot = (type == 6); /* le - special */
/*
* Check for network boot first, since it's a little
* different. The BOOTROM/boot program can only boot
* off of the first (lowest select code) ethernet
* device. device_register() knows this and only
* registers one DV_IFNET. This is a safe assumption
* since the code that finds devices on the DIO bus
* always starts at scode 0 and works its way up.
*/
if (netboot) {
LIST_FOREACH(dd, &dev_data_list, dd_list) {
if (dd->dd_dev->dv_class == DV_IFNET) {
/*
* Found it!
*/
bootdv = dd->dd_dev;
break;
}
}
return;
}
/*
* Check for HP-IB boots next.
*/
if (hpibboot) {
findbootdev_slave(&dev_data_list_hpib, ctlr,
slave, punit);
if (bootdv == NULL)
return;
#ifdef DIAGNOSTIC
/*
* Sanity check.
*/
if ((type == 0 &&
device_match(bootdv->dv_xname, "ct")) ||
(type == 2 &&
device_match(bootdv->dv_xname, "hd"))) {
printf("WARNING: boot device/type mismatch!\n");
printf("device = %s, type = %d\n",
bootdv->dv_xname, type);
bootdv = NULL;
}
#endif
return;
}
/*
* Check for SCSI boots last.
*/
if (scsiboot) {
findbootdev_slave(&dev_data_list_scsi, ctlr,
slave, punit);
if (bootdv == NULL)
return;
#ifdef DIAGNOSTIC
/*
* Sanity check.
*/
if (device_match(bootdv->dv_xname, "cd") != 0 &&
device_match(bootdv->dv_xname, "sd") != 0 &&
device_match(bootdv->dv_xname, "st") != 0) {
printf("WARNING: boot device/type mismatch!\n");
printf("device = %s, type = %d\n",
bootdv->dv_xname, type);
bootdv = NULL;
}
#endif
return;
}
/* Oof! */
printf("WARNING: UNKNOWN BOOT DEVICE TYPE = %d\n", type);
}
void
findbootdev_slave(ddlist, ctlr, slave, punit)
ddlist_t *ddlist;
int ctlr, slave, punit;
{
struct dev_data *cdd, *dd;
/*
* Find the booted controller.
*/
for (cdd = LIST_FIRST(ddlist); ctlr != 0 && cdd != LIST_END(ddlist);
cdd = LIST_NEXT(cdd, dd_clist))
ctlr--;
if (cdd == NULL) {
/*
* Oof, couldn't find it...
*/
return;
}
/*
* Now find the device with the right slave/punit
* that's a child of the controller.
*/
LIST_FOREACH(dd, &dev_data_list, dd_list) {
/*
* "sd" / "st" / "cd" -> "scsibus" -> "spc"
* "hd" -> "hpibbus" -> "fhpib"
*/
if (dd->dd_dev->dv_parent->dv_parent != cdd->dd_dev)
continue;
if (dd->dd_slave == slave &&
dd->dd_punit == punit) {
/*
* Found it!
*/
bootdv = dd->dd_dev;
break;
}
}
}
void
setbootdev()
{
struct dev_data *cdd, *dd;
int type, ctlr;
/*
* Note our magic numbers for type:
*
* 0 == ct
* 2 == hd
* 4 == scsi
* 6 == le
*
* All are bdevsw major numbers, except for le, which
* is just special. SCSI needs specific care since the
* ROM wants to see 4, but depending upon the real device
* we booted from, we might have a different major value.
*/
/*
* Start with a clean slate.
*/
bootdev = 0;
/*
* If we don't have a saveable root_device, just punt.
*/
if (root_device == NULL)
goto out;
dd = dev_data_lookup(root_device);
/*
* If the root device is network, we're done
* early.
*/
if (root_device->dv_class == DV_IFNET) {
bootdev = MAKEBOOTDEV(6, 0, 0, 0, 0);
goto out;
}
/*
* Determine device type.
*/
if (device_match(root_device->dv_xname, "hd") == 0)
type = 2;
else if (device_match(root_device->dv_xname, "cd") == 0 ||
device_match(root_device->dv_xname, "sd") == 0 ||
device_match(root_device->dv_xname, "st") == 0)
/* force scsi disk regardless of the actual device */
type = 4;
else {
printf("WARNING: strange root device!\n");
goto out;
}
/*
* Get parent's info.
*
* "hd" -> "hpibbus" -> "fhpib"
* "sd" / "cd" / "st" -> "scsibus" -> "spc"
*/
for (cdd = LIST_FIRST(&dev_data_list_hpib), ctlr = 0;
cdd != LIST_END(&dev_data_list_hpib);
cdd = LIST_NEXT(cdd, dd_clist), ctlr++) {
if (cdd->dd_dev == root_device->dv_parent->dv_parent) {
/*
* Found it!
*/
bootdev = MAKEBOOTDEV(type, ctlr, dd->dd_slave,
dd->dd_punit, DISKPART(rootdev));
break;
}
}
out:
/* Don't need this anymore. */
for (dd = LIST_FIRST(&dev_data_list);
dd != LIST_END(&dev_data_list); ) {
cdd = dd;
dd = LIST_NEXT(dd, dd_list);
free(cdd, M_DEVBUF);
}
}
/*
* Return the dev_data corresponding to the given device.
*/
static struct dev_data *
dev_data_lookup(dev)
struct device *dev;
{
struct dev_data *dd;
LIST_FOREACH(dd, &dev_data_list, dd_list)
if (dd->dd_dev == dev)
return (dd);
panic("dev_data_lookup");
}
/*
* Insert a dev_data into the provided list, sorted by select code.
*/
static void
dev_data_insert(dd, ddlist)
struct dev_data *dd;
ddlist_t *ddlist;
{
struct dev_data *de;
#ifdef DIAGNOSTIC
if (dd->dd_scode < 0 || dd->dd_scode > 255) {
panic("bogus select code for %s", dd->dd_dev->dv_xname);
}
#endif
/*
* Just insert at head if list is empty.
*/
if (LIST_EMPTY(ddlist)) {
LIST_INSERT_HEAD(ddlist, dd, dd_clist);
return;
}
/*
* Traverse the list looking for a device who's select code
* is greater than ours. When we find it, insert ourselves
* into the list before it.
*/
for (de = LIST_FIRST(ddlist);
LIST_NEXT(de, dd_clist) != LIST_END(ddlist);
de = LIST_NEXT(de, dd_clist)) {
if (de->dd_scode > dd->dd_scode) {
LIST_INSERT_BEFORE(de, dd, dd_clist);
return;
}
}
/*
* Our select code is greater than everyone else's. We go
* onto the end.
*/
LIST_INSERT_AFTER(de, dd, dd_clist);
}
/**********************************************************************
* Code to find and initialize the console
**********************************************************************/
/*
* Scan all select codes, passing the corresponding VA to (*func)().
* (*func)() is a driver-specific routine that looks for the console
* hardware.
*/
void
console_scan(func, arg)
int (*func)(int, caddr_t, void *);
void *arg;
{
int size, scode, sctop;
caddr_t pa, va;
/*
* Scan all select codes. Check each location for some
* hardware. If there's something there, call (*func)().
*/
sctop = DIO_SCMAX(machineid);
for (scode = 0; scode < sctop; ++scode) {
/*
* Skip over the select code hole and
* the internal HP-IB controller.
*/
if (DIO_INHOLE(scode) ||
((scode == 7) && internalhpib))
continue;
/* Map current PA. */
pa = dio_scodetopa(scode);
va = iomap(pa, PAGE_SIZE);
if (va == NULL)
continue;
/* Check to see if hardware exists. */
if (badaddr(va)) {
iounmap(va, PAGE_SIZE);
continue;
}
/*
* Hardware present, call callback. Driver returns
* size of region to map if console probe successful
* and worthwhile.
*/
size = (*func)(scode, va, arg);
iounmap(va, PAGE_SIZE);
if (size != 0 && conscode == scode) {
/* Free last mapping. */
if (convasize)
iounmap(conaddr, convasize);
convasize = 0;
/* Remap to correct size. */
va = iomap(pa, size);
if (va == NULL)
continue;
/* Save this state for next time. */
conaddr = va;
convasize = size;
}
}
}
int consolepass = -1;
/*
* Special version of cninit(). Actually, crippled somewhat.
* This version lets the drivers assign cn_tab.
*/
void
hp300_cninit(void)
{
struct consdev *cp;
extern struct consdev constab[];
if (++consolepass == 0) {
cn_tab = NULL;
/*
* Call all of the console probe functions.
*/
for (cp = constab; cp->cn_probe; cp++)
(*cp->cn_probe)(cp);
}
/*
* No console, we can handle it.
*/
if (cn_tab == NULL)
return;
/*
* Turn on the console.
*
* Note that we need to check for cn_init because DIO frame buffers
* will cause cn_tab to switch to wsdisplaycons, which does not
* have an cn_init function.
*/
if (cn_tab->cn_init != NULL) {
(*cn_tab->cn_init)(cn_tab);
}
}
/**********************************************************************
* Mapping functions
**********************************************************************/
/*
* Allocate/deallocate a cache-inhibited range of kernel virtual address
* space mapping the indicated physical address range [pa - pa+size)
*/
caddr_t
iomap(pa, size)
caddr_t pa;
int size;
{
vaddr_t iova, tva, off;
paddr_t ppa;
int error;
if (size <= 0)
return NULL;
ppa = trunc_page((paddr_t)pa);
off = (paddr_t)pa & PAGE_MASK;
size = round_page(off + size);
error = extent_alloc(extio, size, PAGE_SIZE, 0, EX_NOBOUNDARY,
EX_NOWAIT | EX_MALLOCOK, &iova);
if (error != 0)
return (NULL);
tva = iova;
while (size != 0) {
pmap_kenter_cache(tva, ppa, PG_RW | PG_CI);
size -= PAGE_SIZE;
tva += PAGE_SIZE;
ppa += PAGE_SIZE;
}
pmap_update(pmap_kernel());
return ((void *)(iova + off));
}
/*
* Unmap a previously mapped device.
*/
void
iounmap(va, size)
caddr_t va;
int size;
{
vaddr_t kva, off;
int error;
off = (vaddr_t)va & PAGE_MASK;
kva = trunc_page((vaddr_t)va);
size = round_page(off + size);
pmap_kremove(kva, size);
pmap_update(pmap_kernel());
error = extent_free(extio, kva, size, EX_NOWAIT);
#ifdef DIAGNOSTIC
if (error != 0)
printf("iounmap: extent_free failed\n");
#endif
}
struct nam2blk nam2blk[] = {
{ "ct", 0 },
{ "hd", 2 },
{ "sd", 4 },
{ "st", 7 },
{ "rd", 8 },
{ "cd", 9 },
{ NULL, -1 }
};
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