BBN-Vax-TCP/dev/autoconf.c
/* autoconf.c 4.31 81/07/05 */
/*
* Setup the system to run on the current machine.
*
* Configure() is called at boot time and initializes the uba and mba
* device tables and the memory controller monitoring. Available
* devices are determined (from possibilities mentioned in ioconf.c),
* and the drivers are initialized.
*
* N.B.: A lot of the conditionals based on processor type say
* #if VAX780
* and
* #if VAX750
* which may be incorrect after more processors are introduced if they
* are like either of these machines.
*
* TODO:
* use pcpu info about whether a ubasr exists
*/
#include "mba.h"
#include "../h/param.h"
#include "../h/systm.h"
#include "../h/map.h"
#include "../h/nexus.h"
#include "../h/pte.h"
#include "../h/buf.h"
#include "../h/mbareg.h"
#include "../h/mbavar.h"
#include "../h/dk.h"
#include "../h/vm.h"
#include "../h/ubareg.h"
#include "../h/ubavar.h"
#include "../h/mtpr.h"
#include "../h/cpu.h"
#include "../h/scb.h"
#include "../h/mem.h"
/*
* The following several variables are related to
* the configuration process, and are used in initializing
* the machine.
*/
int cold; /* if 1, still working on cold-start */
int nexnum; /* current nexus number */
int dkn; /* number of iostat dk numbers assigned so far */
/*
* Addresses of the (locore) routines which bootstrap us from
* hardware traps to C code. Filled into the system control block
* as necessary.
*/
#if NMBA > 0
int (*mbaintv[4])() = { Xmba0int, Xmba1int, Xmba2int, Xmba3int };
#endif
#if VAX780
int (*ubaintv[4])() = { Xua0int, Xua1int, Xua2int, Xua3int };
#endif
/*
* This allocates the space for the per-uba information,
* such as buffered data path usage.
*/
struct uba_hd uba_hd[MAXNUBA];
/*
* Determine mass storage and memory configuration for a machine.
* Get cpu type, and then switch out to machine specific procedures
* which will probe adaptors to see what is out there.
*/
configure()
{
union cpusid cpusid;
register struct percpu *ocp;
register int *ip;
extern char Sysbase[];
cpusid.cpusid = mfpr(SID);
for (ocp = percpu; ocp->pc_cputype; ocp++)
if (ocp->pc_cputype == cpusid.cpuany.cp_type) {
probenexus(ocp);
/*
* Write protect the scb. It is strange
* that this code is here, but this is as soon
* as we are done mucking with it, and the
* write-enable was done in assembly language
* to which we will never return.
*/
ip = (int *)Sysmap; *ip &= ~PG_PROT; *ip |= PG_KR;
mtpr(TBIS, Sysbase);
#if GENERIC
setconf();
#endif
cold = 0;
memenable();
return;
}
printf("cpu type %d not configured\n", cpusid.cpuany.cp_type);
asm("halt");
}
/*
* Probe nexus space, finding the interconnects
* and setting up and probing mba's and uba's for devices.
*/
/*ARGSUSED*/
probenexus(pcpu)
register struct percpu *pcpu;
{
register struct nexus *nxv;
struct nexus *nxp = pcpu->pc_nexbase;
union nexcsr nexcsr;
int i;
nexnum = 0, nxv = nexus;
for (; nexnum < pcpu->pc_nnexus; nexnum++, nxp++, nxv++) {
nxaccess(nxp, Nexmap[nexnum]);
if (badaddr((caddr_t)nxv, 4))
continue;
if (pcpu->pc_nextype && pcpu->pc_nextype[nexnum] != NEX_ANY)
nexcsr.nex_csr = pcpu->pc_nextype[nexnum];
else
nexcsr = nxv->nexcsr;
if (nexcsr.nex_csr&NEX_APD)
continue;
switch (nexcsr.nex_type) {
case NEX_MBA:
printf("mba%d at tr%d\n", nummba, nexnum);
if (nummba >= NMBA) {
printf("%d mba's", nummba);
goto unconfig;
}
#if NMBA > 0
mbafind(nxv, nxp);
nummba++;
#endif
break;
case NEX_UBA0:
case NEX_UBA1:
case NEX_UBA2:
case NEX_UBA3:
printf("uba%d at tr%d\n", numuba, nexnum);
if (numuba >= 4) {
printf("5 uba's");
goto unsupp;
}
#if VAX780
if (cpu == VAX_780)
setscbnex(ubaintv[numuba]);
#endif
i = nexcsr.nex_type - NEX_UBA0;
unifind((struct uba_regs *)nxv, (struct uba_regs *)nxp,
umem[i], pcpu->pc_umaddr[i], UMEMmap[i]);
#if VAX780
if (cpu == VAX_780)
((struct uba_regs *)nxv)->uba_cr =
UBACR_IFS|UBACR_BRIE|
UBACR_USEFIE|UBACR_SUEFIE;
#endif
numuba++;
break;
case NEX_DR32:
/* there can be more than one... are there other codes??? */
printf("dr32");
goto unsupp;
case NEX_MEM4:
case NEX_MEM4I:
case NEX_MEM16:
case NEX_MEM16I:
printf("mcr%d at tr%d\n", nmcr, nexnum);
if (nmcr >= 4) {
printf("5 mcr's");
goto unsupp;
}
mcraddr[nmcr++] = (struct mcr *)nxv;
break;
case NEX_MPM0:
case NEX_MPM1:
case NEX_MPM2:
case NEX_MPM3:
printf("mpm");
goto unsupp;
default:
printf("nexus type %x", nexcsr.nex_type);
unsupp:
printf(" unsupported (at tr %d)\n", nexnum);
continue;
unconfig:
printf(" not configured\n");
continue;
}
}
#if VAX780
if (cpu == VAX_780)
{ int ubawatch(); timeout(ubawatch, (caddr_t)0, hz); }
#endif
}
#if NMBA > 0
struct mba_device *mbaconfig();
/*
* Find devices attached to a particular mba
* and look for each device found in the massbus
* initialization tables.
*/
mbafind(nxv, nxp)
struct nexus *nxv, *nxp;
{
register struct mba_regs *mdp;
register struct mba_drv *mbd;
register struct mba_device *mi;
register struct mba_slave *ms;
int dn, dt;
struct mba_device fnd;
mdp = (struct mba_regs *)nxv;
mba_hd[nummba].mh_mba = mdp;
mba_hd[nummba].mh_physmba = (struct mba_regs *)nxp;
setscbnex(mbaintv[nummba]);
fnd.mi_mba = mdp;
fnd.mi_mbanum = nummba;
for (mbd = mdp->mba_drv, dn = 0; mbd < &mdp->mba_drv[8]; mbd++, dn++) {
dt = mbd->mbd_dt & 0xffff;
if (dt == 0)
continue;
if ((dt&MBDT_TYPE) == MBDT_TU78) {
printf("tm04/tu78 unsupported\n");
continue;
}
if (dt == MBDT_MOH)
continue;
fnd.mi_drive = dn;
if ((mi = mbaconfig(&fnd, dt)) && (dt & MBDT_TAP)) {
for (ms = mbsinit; ms->ms_driver; ms++)
if (ms->ms_driver == mi->mi_driver && ms->ms_alive == 0 &&
(ms->ms_ctlr == mi->mi_unit || ms->ms_ctlr=='?')) {
mbd->mbd_tc = ms->ms_slave;
dt = mbd->mbd_dt;
if (dt & MBDT_SPR) {
printf("%s%d at %s%d slave %d\n",
ms->ms_driver->md_sname,
ms->ms_unit,
mi->mi_driver->md_dname,
mi->mi_unit,
ms->ms_slave);
ms->ms_alive = 1;
ms->ms_ctlr = mi->mi_unit;
(*ms->ms_driver->md_slave)
(mi, ms);
}
}
}
}
mdp->mba_cr = MBCR_INIT;
mdp->mba_cr = MBCR_IE;
}
/*
* Have found a massbus device;
* see if it is in the configuration table.
* If so, fill in its data.
*/
struct mba_device *
mbaconfig(ni, type)
register struct mba_device *ni;
register int type;
{
register struct mba_device *mi;
register short *tp;
register struct mba_hd *mh;
for (mi = mbdinit; mi->mi_driver; mi++) {
if (mi->mi_alive)
continue;
tp = mi->mi_driver->md_type;
for (mi->mi_type = 0; *tp; tp++, mi->mi_type++)
if (*tp == (type&MBDT_TYPE))
goto found;
continue;
found:
#define match(fld) (ni->fld == mi->fld || mi->fld == '?')
if (!match(mi_drive) || !match(mi_mbanum))
continue;
printf("%s%d at mba%d drive %d",
mi->mi_driver->md_dname, mi->mi_unit,
ni->mi_mbanum, ni->mi_drive);
printf("\n");
mi->mi_alive = 1;
mh = &mba_hd[ni->mi_mbanum];
mi->mi_hd = mh;
mh->mh_mbip[ni->mi_drive] = mi;
mh->mh_ndrive++;
mi->mi_mba = ni->mi_mba;
mi->mi_drv = &mi->mi_mba->mba_drv[ni->mi_drive];
mi->mi_driver->md_info[mi->mi_unit] = mi;
mi->mi_mbanum = ni->mi_mbanum;
mi->mi_drive = ni->mi_drive;
if (mi->mi_dk && dkn < DK_NDRIVE)
mi->mi_dk = dkn++;
else
mi->mi_dk = -1;
(*mi->mi_driver->md_attach)(mi);
return (mi);
}
return (0);
}
#endif
/*
* Fixctlrmask fixes the masks of the driver ctlr routines
* which otherwise save r10 and r11 where the interrupt and br
* level are passed through.
*/
fixctlrmask()
{
register struct uba_ctlr *um;
register struct uba_device *ui;
register struct uba_driver *ud;
#define phys(a,b) ((b)(((int)(a))&0x7fffffff))
for (um = ubminit; ud = phys(um->um_driver, struct uba_driver *); um++)
*phys(ud->ud_probe, short *) &= ~0xc00;
for (ui = ubdinit; ud = phys(ui->ui_driver, struct uba_driver *); ui++)
*phys(ud->ud_probe, short *) &= ~0xc00;
}
/*
* Find devices on a UNIBUS.
* Uses per-driver routine to set <br,cvec> into <r11,r10>,
* and then fills in the tables, with help from a per-driver
* slave initialization routine.
*/
unifind(vubp, pubp, vumem, pumem, memmap)
struct uba_regs *vubp, *pubp;
caddr_t vumem, pumem;
struct pte *memmap;
{
#ifndef lint
register int br, cvec; /* MUST BE r11, r10 */
#else
/*
* Lint doesn't realize that these
* can be initialized asynchronously
* when devices interrupt.
*/
register int br = 0, cvec = 0;
#endif
register struct uba_device *ui;
register struct uba_ctlr *um;
u_short *reg, addr;
struct uba_hd *uhp;
struct uba_driver *udp;
int i, (**ivec)(), haveubasr = 0;
/*
* Initialize the UNIBUS, by freeing the map
* registers and the buffered data path registers
*/
uhp = &uba_hd[numuba];
uhp->uh_map = (struct map *)calloc(UAMSIZ * sizeof (struct map));
rminit(uhp->uh_map, NUBMREG, 1, "uba", UAMSIZ);
switch (cpu) {
#if VAX780
case VAX_780:
uhp->uh_bdpfree = (1<<NBDP780) - 1;
haveubasr = 1;
break;
#endif
#if VAX750
case VAX_750:
uhp->uh_bdpfree = (1<<NBDP750) - 1;
break;
#endif
#if VAX7ZZ
case VAX_7ZZ:
break;
#endif
}
/*
* Save virtual and physical addresses
* of adaptor, and allocate and initialize
* the UNIBUS interrupt vector.
*/
uhp->uh_uba = vubp;
uhp->uh_physuba = pubp;
/* HAVE TO DO SOMETHING SPECIAL FOR SECOND UNIBUS ON COMETS HERE */
if (numuba == 0)
uhp->uh_vec = UNIvec;
else
uhp->uh_vec = (int(**)())calloc(512);
for (i = 0; i < 128; i++)
uhp->uh_vec[i] =
scbentry(&catcher[i*2], SCB_ISTACK);
/* THIS IS A CHEAT: USING THE FACT THAT UMEM and NEXI ARE SAME SIZE */
nxaccess((struct nexus *)pumem, memmap);
#if VAX780
if (haveubasr) {
vubp->uba_sr = vubp->uba_sr;
vubp->uba_cr = UBACR_IFS|UBACR_BRIE;
}
#endif
/*
* Map the first page of UNIBUS i/o
* space to the first page of memory
* for devices which will need to dma
* output to produce an interrupt.
*/
*(int *)(&vubp->uba_map[0]) = UBAMR_MRV;
#define ubaddr(off) (u_short *)((int)vumem + ((off)&0x1fff))
/*
* Check each unibus mass storage controller.
* For each one which is potentially on this uba,
* see if it is really there, and if it is record it and
* then go looking for slaves.
*/
for (um = ubminit; udp = um->um_driver; um++) {
if (um->um_ubanum != numuba && um->um_ubanum != '?')
continue;
addr = (u_short)um->um_addr;
reg = ubaddr(addr);
if (badaddr((caddr_t)reg, 2))
continue;
#if VAX780
if (haveubasr && vubp->uba_sr) {
vubp->uba_sr = vubp->uba_sr;
continue;
}
#endif
cvec = 0x200;
i = (*udp->ud_probe)(reg);
#if VAX780
if (haveubasr && vubp->uba_sr) {
vubp->uba_sr = vubp->uba_sr;
continue;
}
#endif
if (i == 0)
continue;
printf("%s%d at uba%d csr %o ",
udp->ud_mname, um->um_ctlr, numuba, addr);
if (cvec == 0) {
printf("zero vector\n");
continue;
}
if (cvec == 0x200) {
printf("didn't interrupt\n");
continue;
}
printf("vec %o, ipl %x\n", cvec, br);
um->um_alive = 1;
um->um_ubanum = numuba;
um->um_hd = &uba_hd[numuba];
um->um_addr = (caddr_t)reg;
udp->ud_minfo[um->um_ctlr] = um;
for (ivec = um->um_intr; *ivec; ivec++) {
um->um_hd->uh_vec[cvec/4] =
scbentry(*ivec, SCB_ISTACK);
cvec += 4;
}
for (ui = ubdinit; ui->ui_driver; ui++) {
if (ui->ui_driver != udp || ui->ui_alive ||
ui->ui_ctlr != um->um_ctlr && ui->ui_ctlr != '?' ||
ui->ui_ubanum != numuba && ui->ui_ubanum != '?')
continue;
if ((*udp->ud_slave)(ui, reg)) {
ui->ui_alive = 1;
ui->ui_ctlr = um->um_ctlr;
ui->ui_ubanum = numuba;
ui->ui_hd = &uba_hd[numuba];
ui->ui_addr = (caddr_t)reg;
ui->ui_physaddr = pumem + (addr&0x1fff);
if (ui->ui_dk && dkn < DK_NDRIVE)
ui->ui_dk = dkn++;
else
ui->ui_dk = -1;
ui->ui_mi = um;
/* ui_type comes from driver */
udp->ud_dinfo[ui->ui_unit] = ui;
printf("%s%d at %s%d slave %d\n",
udp->ud_dname, ui->ui_unit,
udp->ud_mname, um->um_ctlr, ui->ui_slave);
(*udp->ud_attach)(ui);
}
}
}
/*
* Now look for non-mass storage peripherals.
*/
for (ui = ubdinit; udp = ui->ui_driver; ui++) {
if (ui->ui_ubanum != numuba && ui->ui_ubanum != '?' ||
ui->ui_alive || ui->ui_slave != -1)
continue;
addr = (u_short)ui->ui_addr;
reg = ubaddr(addr);
if (badaddr((caddr_t)reg, 2))
continue;
#if VAX780
if (haveubasr && vubp->uba_sr) {
vubp->uba_sr = vubp->uba_sr;
continue;
}
#endif
cvec = 0x200;
i = (*udp->ud_probe)(reg);
#if VAX780
if (haveubasr && vubp->uba_sr) {
vubp->uba_sr = vubp->uba_sr;
continue;
}
#endif
if (i == 0)
continue;
printf("%s%d at uba%d csr %o ",
ui->ui_driver->ud_dname, ui->ui_unit, numuba, addr);
if (cvec == 0) {
printf("zero vector\n");
continue;
}
if (cvec == 0x200) {
printf("didn't interrupt\n");
continue;
}
printf("vec %o, ipl %x\n", cvec, br);
ui->ui_hd = &uba_hd[numuba];
for (ivec = ui->ui_intr; *ivec; ivec++) {
ui->ui_hd->uh_vec[cvec/4] =
scbentry(*ivec, SCB_ISTACK);
cvec += 4;
}
ui->ui_alive = 1;
ui->ui_ubanum = numuba;
ui->ui_addr = (caddr_t)reg;
ui->ui_physaddr = pumem + (addr&0x1fff);
ui->ui_dk = -1;
/* ui_type comes from driver */
udp->ud_dinfo[ui->ui_unit] = ui;
(*udp->ud_attach)(ui);
}
}
setscbnex(fn)
int (*fn)();
{
register struct scb *scbp = &scb;
scbp->scb_ipl14[nexnum] = scbp->scb_ipl15[nexnum] =
scbp->scb_ipl16[nexnum] = scbp->scb_ipl17[nexnum] =
scbentry(fn, SCB_ISTACK);
}
/*
* Make a nexus accessible at physical address phys
* by mapping kernel ptes starting at pte.
*
* WE LEAVE ALL NEXI MAPPED; THIS IS PERHAPS UNWISE
* SINCE MISSING NEXI DONT RESPOND. BUT THEN AGAIN
* PRESENT NEXI DONT RESPOND TO ALL OF THEIR ADDRESS SPACE.
*/
nxaccess(physa, pte)
struct nexus *physa;
register struct pte *pte;
{
register int i = btop(sizeof (struct nexus));
register unsigned v = btop(physa);
do
*(int *)pte++ = PG_V|PG_KW|v++;
while (--i > 0);
mtpr(TBIA, 0);
}