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BSD 4_3 release
[unix-history] / usr / src / sys / vax / autoconf.c
/*
* Copyright (c) 1982,1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* @(#)autoconf.c 7.1 (Berkeley) 6/6/86
*/
/*
* 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.
*/
#include "mba.h"
#include "uba.h"
#include "pte.h"
#include "param.h"
#include "systm.h"
#include "map.h"
#include "buf.h"
#include "dk.h"
#include "vm.h"
#include "conf.h"
#include "dmap.h"
#include "reboot.h"
#include "cpu.h"
#include "mem.h"
#include "mtpr.h"
#include "nexus.h"
#include "scb.h"
#include "ioa.h"
#include "../vaxmba/mbareg.h"
#include "../vaxmba/mbavar.h"
#include "../vaxuba/ubareg.h"
#include "../vaxuba/ubavar.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 nsbi; /* current sbi number */
int dkn; /* number of iostat dk numbers assigned so far */
int cpuspeed = 1; /* relative cpu speed */
/*
* 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 };
#if NMBA > 4
Need to expand the table for more than 4 massbus adaptors
#endif
#endif
#if defined(VAX780) || defined(VAX8600)
int (*ubaintv[])() =
{
Xua0int, Xua1int, Xua2int, Xua3int,
#if NUBA > 4
Xua4int, Xua5int, Xua6int, Xua7int,
#endif
#if NUBA > 8
Need to expand the table for more than 8 unibus adaptors
#endif
};
#endif
/*
* This allocates the space for the per-uba information,
* such as buffered data path usage.
*/
struct uba_hd uba_hd[NUBA];
/*
* 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) {
cpuspeed = ocp->pc_cpuspeed;
probeio(ocp);
/*
* Write protect the scb and UNIBUS interrupt vectors.
* 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 + 1; *ip &= ~PG_PROT; *ip |= PG_KR;
ip++; *ip &= ~PG_PROT; *ip |= PG_KR;
#if NUBA > 1
ip++; *ip &= ~PG_PROT; *ip |= PG_KR;
#endif
mtpr(TBIS, Sysbase);
#if GENERIC
if ((boothowto & RB_ASKNAME) == 0)
setroot();
setconf();
#else
setroot();
#endif
/*
* Configure swap area and related system
* parameter based on device(s) used.
*/
swapconf();
cold = 0;
memenable();
return;
}
printf("cpu type %d not configured\n", cpusid.cpuany.cp_type);
asm("halt");
}
/*
* Probe the main IO bus(es).
* The percpu structure gives us a handle on the addresses and/or types.
*/
probeio(pcpu)
register struct percpu *pcpu;
{
register struct iobus *iob;
int ioanum;
ioanum = 0;
for (iob = pcpu->pc_io; ioanum < pcpu->pc_nioa; ioanum++, iob++) {
switch (iob->io_type) {
#if VAX780 || VAX750 || VAX730 || VAX630
case IO_SBI780:
case IO_CMI750:
case IO_XXX730:
case IO_QBUS:
probenexi((struct nexusconnect *)iob->io_details);
break;
#endif
#if VAX8600
case IO_ABUS:
probe_Abus(ioanum, iob);
break;
#endif
default:
if (iob->io_addr) {
printf(
"IO adaptor %d, type %d, at address 0x%x is unsupported\n",
ioanum, iob->io_type, iob->io_addr);
} else
printf("IO adaptor %d, type %d, is unsupported\n",
ioanum, iob->io_type);
break;
}
}
}
#if VAX8600
probe_Abus(ioanum, iob)
register struct iobus *iob;
{
register struct ioa *ioap;
union ioacsr ioacsr;
int type;
struct sbia_regs *sbiaregs;
ioap = &ioa[ioanum];
ioaccess(iob->io_addr, Ioamap[ioanum], iob->io_size);
if (badaddr((caddr_t)ioap, 4))
return;
ioacsr.ioa_csr = ioap->ioacsr.ioa_csr;
type = ioacsr.ioa_type & IOA_TYPMSK;
switch (type) {
case IOA_SBIA:
printf("SBIA%d at IO adaptor %d address 0x%x\n",
nsbi, ioanum, iob->io_addr);
probenexi((struct nexusconnect *)iob->io_details);
nsbi++;
sbiaregs = (struct sbia_regs *)ioap;
sbiaregs->sbi_errsum = -1;
sbiaregs->sbi_error = 0x1000;
sbiaregs->sbi_fltsts = 0xc0000;
break;
default:
printf("IOA%d at address 0x%x is unsupported (type = 0x%x)\n",
ioanum, iob->io_addr, ioacsr.ioa_type);
break;
}
}
#endif
/*
* Probe nexus space, finding the interconnects
* and setting up and probing mba's and uba's for devices.
*/
/*ARGSUSED*/
probenexi(pnc)
register struct nexusconnect *pnc;
{
register struct nexus *nxv;
struct nexus *nxp = pnc->psb_nexbase;
union nexcsr nexcsr;
int i;
nexnum = 0, nxv = &nexus[nsbi * NNEXSBI];
for (; nexnum < pnc->psb_nnexus; nexnum++, nxp++, nxv++) {
ioaccess((caddr_t)nxp, Nexmap[nsbi * NNEXSBI + nexnum],
sizeof(struct nexus));
if (badaddr((caddr_t)nxv, 4))
continue;
if (pnc->psb_nextype && pnc->psb_nextype[nexnum] != NEX_ANY)
nexcsr.nex_csr = pnc->psb_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 VAX750
if (numuba >= 2 && cpu == VAX_750) {
printf("More than 2 UBA's");
goto unsupp;
}
#endif
if (numuba >= NUBA) {
printf("%d uba's", ++numuba);
goto unconfig;
}
#if defined(VAX780) || defined(VAX8600)
if ((cpu == VAX_780) || (cpu == VAX_8600))
setscbnex(ubaintv[numuba]);
#endif
i = nexcsr.nex_type - NEX_UBA0;
unifind((struct uba_regs *)nxv, (struct uba_regs *)nxp,
umem[numuba], pnc->psb_umaddr[i], UMEMmap[numuba],
pnc->psb_haveubasr);
#if defined(VAX780) || defined(VAX8600)
if ((cpu == VAX_780) || (cpu == VAX_8600))
((struct uba_regs *)nxv)->uba_cr =
UBACR_IFS|UBACR_BRIE|
UBACR_USEFIE|UBACR_SUEFIE|
(((struct uba_regs *)nxv)->uba_cr&0x7c000000);
#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;
}
switch (cpu) {
case VAX_780:
mcrtype[nmcr] = M780C;
break;
case VAX_750:
mcrtype[nmcr] = M750;
break;
case VAX_730:
mcrtype[nmcr] = M730;
break;
}
mcraddr[nmcr++] = (struct mcr *)nxv;
break;
case NEX_MEM64I:
case NEX_MEM64L:
case NEX_MEM64LI:
case NEX_MEM256I:
case NEX_MEM256L:
case NEX_MEM256LI:
printf("mcr%d (el) at tr%d\n", nmcr, nexnum);
if (nmcr >= 4) {
printf("5 mcr's");
goto unsupp;
}
if (cpu == VAX_780)
mcrtype[nmcr] = M780EL;
mcraddr[nmcr++] = (struct mcr *)nxv;
if (nexcsr.nex_type != NEX_MEM64I &&
nexcsr.nex_type != NEX_MEM256I)
break;
/* fall into ... */
case NEX_MEM64U:
case NEX_MEM64UI:
case NEX_MEM256U:
case NEX_MEM256UI:
printf("mcr%d (eu) at tr%d\n", nmcr, nexnum);
if (nmcr >= 4) {
printf("5 mcr's");
goto unsupp;
}
if (cpu == VAX_780)
mcrtype[nmcr] = M780EU;
mcraddr[nmcr++] = (struct mcr *)nxv;
break;
case NEX_MPM0:
case NEX_MPM1:
case NEX_MPM2:
case NEX_MPM3:
printf("mpm");
goto unsupp;
case NEX_CI:
printf("ci");
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 (nummba > NMBA)
nummba = NMBA;
if (numuba > NUBA)
numuba = NUBA;
}
#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, sn;
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++) {
if ((mbd->mbd_ds&MBDS_DPR) == 0)
continue;
mdp->mba_sr |= MBSR_NED; /* si kludge */
dt = mbd->mbd_dt & 0xffff;
if (dt == 0)
continue;
if (mdp->mba_sr&MBSR_NED)
continue; /* si kludge */
if (dt == MBDT_MOH)
continue;
fnd.mi_drive = dn;
#define qeq(a, b) ( a == b || a == '?' )
if ((mi = mbaconfig(&fnd, dt)) && (dt & MBDT_TAP))
for (sn = 0; sn < 8; sn++) {
mbd->mbd_tc = sn;
for (ms = mbsinit; ms->ms_driver; ms++)
if (ms->ms_driver == mi->mi_driver &&
ms->ms_alive == 0 &&
qeq(ms->ms_ctlr, mi->mi_unit) &&
qeq(ms->ms_slave, sn) &&
(*ms->ms_driver->md_slave)(mi, ms, sn)) {
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
, sn
);
ms->ms_alive = 1;
ms->ms_ctlr = mi->mi_unit;
ms->ms_slave = sn;
}
}
}
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\n",
mi->mi_driver->md_dname, mi->mi_unit,
ni->mi_mbanum, ni->mi_drive);
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_mbanum = ni->mi_mbanum;
mi->mi_drive = ni->mi_drive;
/*
* If drive has never been seen before,
* give it a dkn for statistics.
*/
if (mi->mi_driver->md_info[mi->mi_unit] == 0) {
mi->mi_driver->md_info[mi->mi_unit] = mi;
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, haveubasr)
struct uba_regs *vubp, *pubp;
caddr_t vumem, pumem;
struct pte *memmap;
int haveubasr;
{
#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, *ap, addr;
struct uba_hd *uhp;
struct uba_driver *udp;
int i, (**ivec)();
caddr_t ualloc, zmemall();
extern int catcher[256];
#if VAX630
/*
* The map registers start right at 20088000 on the
* ka630, so we have to subtract out the 2k offset to make the
* pointers work..
*/
if (cpu == VAX_630) {
vubp = (struct uba_regs *)(((u_long)vubp)-0x800);
pubp = (struct uba_regs *)(((u_long)pubp)-0x800);
}
#endif
/*
* 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));
ubainitmaps(uhp);
/*
* Save virtual and physical addresses
* of adaptor, and allocate and initialize
* the UNIBUS interrupt vector.
*/
uhp->uh_uba = vubp;
uhp->uh_physuba = pubp;
/*
* On the 8600, can't use UNIvec;
* the vectors for the second SBI overlap it.
*/
if (cpu == VAX_8600)
uhp->uh_vec = (int(**)())calloc(512);
else if (numuba == 0)
uhp->uh_vec = UNIvec;
#if NUBA > 1
else if (numuba == 1)
uhp->uh_vec = UNI1vec;
else
uhp->uh_vec = (int(**)())calloc(512);
#endif
for (i = 0; i < 128; i++)
uhp->uh_vec[i] =
scbentry(&catcher[i*2], SCB_ISTACK);
/*
* Set last free interrupt vector for devices with
* programmable interrupt vectors. Use is to decrement
* this number and use result as interrupt vector.
*/
uhp->uh_lastiv = 0x200;
#if VAX630
/*
* Kludge time again. The q22 memory and device reg. address spaces
* are not physically contiguous, so we need 2 loops to map them
* into contiguous virtual space.
*/
if (cpu == VAX_630) {
ioaccess(pumem, memmap, (UBAPAGES-16)*NBPG);
ioaccess(0x20000000, memmap+(UBAPAGES-16), 16*NBPG);
} else
#endif
ioaccess(pumem, memmap, UBAPAGES * NBPG);
#if defined(VAX780) || defined(VAX8600)
if (haveubasr) {
vubp->uba_sr = vubp->uba_sr;
vubp->uba_cr = UBACR_IFS|UBACR_BRIE;
}
#endif
/*
* First configure devices that have unibus memory,
* allowing them to allocate the correct map registers.
*/
ubameminit(numuba);
/*
* Grab some memory to record the umem address space we allocate,
* so we can be sure not to place two devices at the same address.
*
* We could use just 1/8 of this (we only want a 1 bit flag) but
* we are going to give it back anyway, and that would make the
* code here bigger (which we can't give back), so ...
*
* One day, someone will make a unibus with something other than
* an 8K i/o address space, & screw this totally.
*/
ualloc = zmemall(memall, 8*1024);
if (ualloc == (caddr_t)0)
panic("no mem for unifind");
/*
* 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 ubaoff(off) ((off)&0x1fff)
#define ubaddr(off) (u_short *)((int)vumem + (ubaoff(off)|0x3e000))
/*
* 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;
/*
* use the particular address specified first,
* or if it is given as "0", of there is no device
* at that address, try all the standard addresses
* in the driver til we find it
*/
for (ap = udp->ud_addr; addr || (addr = *ap++); addr = 0) {
if (ualloc[ubaoff(addr)])
continue;
reg = ubaddr(addr);
if (badaddr((caddr_t)reg, 2))
continue;
#if defined(VAX780) || defined(VAX8600)
if (haveubasr && vubp->uba_sr) {
vubp->uba_sr = vubp->uba_sr;
continue;
}
#endif
cvec = 0x200;
i = (*udp->ud_probe)(reg, um->um_ctlr, um);
#if defined(VAX780) || defined(VAX8600)
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 + ubdevreg(addr);
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);
}
}
break;
}
}
/*
* 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;
for (ap = udp->ud_addr; addr || (addr = *ap++); addr = 0) {
if (ualloc[ubaoff(addr)])
continue;
reg = ubaddr(addr);
if (badaddr((caddr_t)reg, 2))
continue;
#if defined(VAX780) || defined(VAX8600)
if (haveubasr && vubp->uba_sr) {
vubp->uba_sr = vubp->uba_sr;
continue;
}
#endif
cvec = 0x200;
i = (*udp->ud_probe)(reg, ui);
#if defined(VAX780) || defined(VAX8600)
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);
while (--i >= 0)
ualloc[ubaoff(addr+i)] = 1;
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 + ubdevreg(addr);
ui->ui_dk = -1;
/* ui_type comes from driver */
udp->ud_dinfo[ui->ui_unit] = ui;
(*udp->ud_attach)(ui);
break;
}
}
#ifdef AUTO_DEBUG
printf("Unibus allocation map");
for (i = 0; i < 8*1024; ) {
register n, m;
if ((i % 128) == 0) {
printf("\n%6o:", i);
for (n = 0; n < 128; n++)
if (ualloc[i+n])
break;
if (n == 128) {
i += 128;
continue;
}
}
for (n = m = 0; n < 16; n++) {
m <<= 1;
m |= ualloc[i++];
}
printf(" %4x", m);
}
printf("\n");
#endif
wmemfree(ualloc, 8*1024);
}
setscbnex(fn)
int (*fn)();
{
register struct scb *scbp = &scb;
scbp = (struct scb *)((caddr_t)scbp + nsbi * 512);
scbp->scb_ipl14[nexnum] = scbp->scb_ipl15[nexnum] =
scbp->scb_ipl16[nexnum] = scbp->scb_ipl17[nexnum] =
scbentry(fn, SCB_ISTACK);
}
/*
* Make an IO register area accessible at physical address physa
* by mapping kernel ptes starting at pte.
*/
ioaccess(physa, pte, size)
caddr_t physa;
register struct pte *pte;
int size;
{
register int i = btop(size);
register unsigned v = btop(physa);
do
*(int *)pte++ = PG_V|PG_KW|v++;
while (--i > 0);
mtpr(TBIA, 0);
}
/*
* Configure swap space and related parameters.
*/
swapconf()
{
register struct swdevt *swp;
register int nblks;
for (swp = swdevt; swp->sw_dev; swp++) {
if (bdevsw[major(swp->sw_dev)].d_psize) {
nblks =
(*bdevsw[major(swp->sw_dev)].d_psize)(swp->sw_dev);
if (swp->sw_nblks == 0 || swp->sw_nblks > nblks)
swp->sw_nblks = nblks;
}
}
if (!cold) /* in case called for mba device */
return;
if (dumplo == 0 && bdevsw[major(dumpdev)].d_psize)
dumplo = (*bdevsw[major(dumpdev)].d_psize)(dumpdev) - physmem;
if (dumplo < 0)
dumplo = 0;
}
#define DOSWAP /* Change swdevt, argdev, and dumpdev too */
u_long bootdev; /* should be dev_t, but not until 32 bits */
static char devname[][2] = {
'h','p', /* 0 = hp */
0,0, /* 1 = ht */
'u','p', /* 2 = up */
'r','k', /* 3 = hk */
0,0, /* 4 = sw */
0,0, /* 5 = tm */
0,0, /* 6 = ts */
0,0, /* 7 = mt */
0,0, /* 8 = tu */
'r','a', /* 9 = ra */
0,0, /* 10 = ut */
'r','b', /* 11 = rb */
0,0, /* 12 = uu */
0,0, /* 13 = rx */
'r','l', /* 14 = rl */
};
#define PARTITIONMASK 0x7
#define PARTITIONSHIFT 3
/*
* Attempt to find the device from which we were booted.
* If we can do so, and not instructed not to do so,
* change rootdev to correspond to the load device.
*/
setroot()
{
int majdev, mindev, unit, part, adaptor;
dev_t temp, orootdev;
struct swdevt *swp;
if (boothowto & RB_DFLTROOT ||
(bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
return;
majdev = (bootdev >> B_TYPESHIFT) & B_TYPEMASK;
if (majdev > sizeof(devname) / sizeof(devname[0]))
return;
adaptor = (bootdev >> B_ADAPTORSHIFT) & B_ADAPTORMASK;
part = (bootdev >> B_PARTITIONSHIFT) & B_PARTITIONMASK;
unit = (bootdev >> B_UNITSHIFT) & B_UNITMASK;
if (majdev == 0) { /* MBA device */
#if NMBA > 0
register struct mba_device *mbap;
int mask;
/*
* The MBA number used at boot time is not necessarily the same as the
* MBA number used by the kernel. In order to change the rootdev we need to
* convert the boot MBA number to the kernel MBA number. The address space
* for an MBA used by the boot code is 0x20010000 + 0x2000 * MBA_number
* on the 78? and 86?0, 0xf28000 + 0x2000 * MBA_number on the 750.
* Therefore we can search the mba_hd table for the MBA that has the physical
* address corresponding to the boot MBA number.
*/
#define PHYSADRSHFT 13
#define PHYSMBAMASK780 0x7
#define PHYSMBAMASK750 0x3
switch (cpu) {
case VAX_780:
case VAX_8600:
default:
mask = PHYSMBAMASK780;
break;
case VAX_750:
mask = PHYSMBAMASK750;
break;
}
for (mbap = mbdinit; mbap->mi_driver; mbap++)
if (mbap->mi_alive && mbap->mi_drive == unit &&
(((long)mbap->mi_hd->mh_physmba >> PHYSADRSHFT)
& mask) == adaptor)
break;
if (mbap->mi_driver == 0)
return;
mindev = mbap->mi_unit;
#else
return;
#endif
} else {
register struct uba_device *ubap;
for (ubap = ubdinit; ubap->ui_driver; ubap++)
if (ubap->ui_alive && ubap->ui_slave == unit &&
ubap->ui_ubanum == adaptor &&
ubap->ui_driver->ud_dname[0] == devname[majdev][0] &&
ubap->ui_driver->ud_dname[1] == devname[majdev][1])
break;
if (ubap->ui_driver == 0)
return;
mindev = ubap->ui_unit;
}
mindev = (mindev << PARTITIONSHIFT) + part;
orootdev = rootdev;
rootdev = makedev(majdev, mindev);
/*
* If the original rootdev is the same as the one
* just calculated, don't need to adjust the swap configuration.
*/
if (rootdev == orootdev)
return;
printf("Changing root device to %c%c%d%c\n",
devname[majdev][0], devname[majdev][1],
mindev >> PARTITIONSHIFT, part + 'a');
#ifdef DOSWAP
mindev &= ~PARTITIONMASK;
for (swp = swdevt; swp->sw_dev; swp++) {
if (majdev == major(swp->sw_dev) &&
mindev == (minor(swp->sw_dev) & ~PARTITIONMASK)) {
temp = swdevt[0].sw_dev;
swdevt[0].sw_dev = swp->sw_dev;
swp->sw_dev = temp;
break;
}
}
if (swp->sw_dev == 0)
return;
/*
* If argdev and dumpdev were the same as the old primary swap
* device, move them to the new primary swap device.
*/
if (temp == dumpdev)
dumpdev = swdevt[0].sw_dev;
if (temp == argdev)
argdev = swdevt[0].sw_dev;
#endif
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.