379 lines
10 KiB
C
379 lines
10 KiB
C
/* $NetBSD: mem.c,v 1.5 2002/11/17 17:10:46 chs Exp $ */
|
|
|
|
/* $OpenBSD: mem.c,v 1.5 2001/05/05 20:56:36 art Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1998,1999 Michael Shalayeff
|
|
* All rights reserved.
|
|
*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Michael Shalayeff.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 MIND,
|
|
* 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.
|
|
*/
|
|
/*
|
|
* Copyright (c) 1991,1992,1994, The University of Utah and
|
|
* the Computer Systems Laboratory (CSL). All rights reserved.
|
|
*
|
|
* Subject to your agreements with CMU,
|
|
* permission to use, copy, modify and distribute this software and its
|
|
* documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
|
|
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
|
|
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
|
|
* improvements that they make and grant CSL redistribution rights.
|
|
*
|
|
* Utah $Hdr: mem.c 1.9 94/12/16$
|
|
*/
|
|
/*
|
|
* Mach Operating System
|
|
* Copyright (c) 1992 Carnegie Mellon University
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and its
|
|
* documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
|
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie Mellon
|
|
* the rights to redistribute these changes.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/device.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/file.h>
|
|
|
|
#include <uvm/uvm.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/iomod.h>
|
|
#include <machine/autoconf.h>
|
|
#include <machine/pmap.h>
|
|
|
|
#include <hp700/hp700/machdep.h>
|
|
#include <hp700/dev/cpudevs.h>
|
|
#include <hp700/dev/viper.h>
|
|
|
|
struct mem_softc {
|
|
struct device sc_dev;
|
|
|
|
volatile struct vi_trs *sc_vp;
|
|
};
|
|
|
|
int memmatch __P((struct device *, struct cfdata *, void *));
|
|
void memattach __P((struct device *, struct device *, void *));
|
|
|
|
CFATTACH_DECL(mem, sizeof(struct mem_softc),
|
|
memmatch, memattach, NULL, NULL);
|
|
|
|
extern struct cfdriver mem_cd;
|
|
|
|
dev_type_read(mmrw);
|
|
dev_type_ioctl(mmioctl);
|
|
dev_type_mmap(mmmmap);
|
|
|
|
const struct cdevsw mem_cdevsw = {
|
|
nullopen, nullclose, mmrw, mmrw, mmioctl,
|
|
nostop, notty, nopoll, mmmmap,
|
|
};
|
|
|
|
static caddr_t zeropage;
|
|
|
|
/* A lock for the vmmap, 16-byte aligned as PA-RISC semaphores must be. */
|
|
static int32_t vmmap_lock __attribute__ ((aligned (16))) = 1;
|
|
|
|
int
|
|
memmatch(parent, cf, aux)
|
|
struct device *parent;
|
|
struct cfdata *cf;
|
|
void *aux;
|
|
{
|
|
register struct confargs *ca = aux;
|
|
|
|
if (ca->ca_type.iodc_type != HPPA_TYPE_MEMORY ||
|
|
ca->ca_type.iodc_sv_model != HPPA_MEMORY_PDEP)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
memattach(parent, self, aux)
|
|
struct device *parent;
|
|
struct device *self;
|
|
void *aux;
|
|
{
|
|
struct pdc_iodc_minit pdc_minit PDC_ALIGNMENT;
|
|
register struct confargs *ca = aux;
|
|
register struct mem_softc *sc = (struct mem_softc *)self;
|
|
int err;
|
|
int pagezero_cookie;
|
|
|
|
printf (":");
|
|
|
|
pagezero_cookie = hp700_pagezero_map();
|
|
|
|
/* XXX check if we are dealing w/ Viper */
|
|
if (ca->ca_hpa == (hppa_hpa_t)VIPER_HPA) {
|
|
int s;
|
|
char bits[128];
|
|
|
|
sc->sc_vp = (struct vi_trs *)
|
|
&((struct iomod *)ca->ca_hpa)->priv_trs;
|
|
|
|
bitmask_snprintf(VI_CTRL, VIPER_BITS, bits, sizeof(bits));
|
|
printf (" viper rev %x, ctrl %s",
|
|
sc->sc_vp->vi_status.hw_rev,
|
|
bits);
|
|
|
|
s = splhigh();
|
|
VI_CTRL |= VI_CTRL_ANYDEN;
|
|
((struct vi_ctrl *)&VI_CTRL)->core_den = 0;
|
|
((struct vi_ctrl *)&VI_CTRL)->sgc0_den = 0;
|
|
((struct vi_ctrl *)&VI_CTRL)->sgc1_den = 0;
|
|
((struct vi_ctrl *)&VI_CTRL)->core_prf = 1;
|
|
sc->sc_vp->vi_control = VI_CTRL;
|
|
splx(s);
|
|
#ifdef DEBUG
|
|
bitmask_snprintf(VI_CTRL, VIPER_BITS, bits, sizeof(bits));
|
|
printf (" >> %s", bits);
|
|
#endif
|
|
} else
|
|
sc->sc_vp = NULL;
|
|
|
|
if ((err = pdc_call((iodcio_t)pdc, 0, PDC_IODC, PDC_IODC_NINIT,
|
|
&pdc_minit, ca->ca_hpa, PAGE0->imm_spa_size)) < 0)
|
|
pdc_minit.max_spa = PAGE0->imm_max_mem;
|
|
|
|
hp700_pagezero_unmap(pagezero_cookie);
|
|
|
|
printf (" size %d", pdc_minit.max_spa / (1024*1024));
|
|
if (pdc_minit.max_spa % (1024*1024))
|
|
printf (".%d", pdc_minit.max_spa % (1024*1024));
|
|
printf ("MB\n");
|
|
}
|
|
|
|
void
|
|
viper_setintrwnd(mask)
|
|
u_int32_t mask;
|
|
{
|
|
register struct mem_softc *sc;
|
|
|
|
sc = mem_cd.cd_devs[0];
|
|
|
|
if (sc->sc_vp)
|
|
sc->sc_vp->vi_intrwd;
|
|
}
|
|
|
|
void
|
|
viper_eisa_en()
|
|
{
|
|
register struct mem_softc *sc;
|
|
int pagezero_cookie;
|
|
|
|
sc = mem_cd.cd_devs[0];
|
|
|
|
pagezero_cookie = hp700_pagezero_map();
|
|
if (sc->sc_vp)
|
|
((struct vi_ctrl *)&VI_CTRL)->eisa_den = 0;
|
|
hp700_pagezero_unmap(pagezero_cookie);
|
|
}
|
|
|
|
int
|
|
mmrw(dev, uio, flags)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flags;
|
|
{
|
|
register u_int c;
|
|
register struct iovec *iov;
|
|
int error = 0;
|
|
int32_t lockheld = 0;
|
|
vaddr_t v, o;
|
|
vm_prot_t prot;
|
|
int rw;
|
|
|
|
while (uio->uio_resid > 0 && error == 0) {
|
|
iov = uio->uio_iov;
|
|
if (iov->iov_len == 0) {
|
|
uio->uio_iov++;
|
|
uio->uio_iovcnt--;
|
|
if (uio->uio_iovcnt < 0)
|
|
panic("mmrw");
|
|
continue;
|
|
}
|
|
switch (minor(dev)) {
|
|
|
|
case DEV_MEM: /* /dev/mem */
|
|
|
|
/* If the address isn't in RAM, bail. */
|
|
v = uio->uio_offset;
|
|
if (btoc(v) > totalphysmem) {
|
|
error = EFAULT;
|
|
/* this will break us out of the loop */
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* If the address is inside our large
|
|
* directly-mapped kernel BTLB entries,
|
|
* use kmem instead.
|
|
*/
|
|
if (v < virtual_start) {
|
|
goto use_kmem;
|
|
}
|
|
|
|
/*
|
|
* If we don't already hold the vmmap lock,
|
|
* acquire it.
|
|
*/
|
|
while (!lockheld) {
|
|
__asm __volatile(
|
|
" ldcw %1, %0 \n"
|
|
" comb,=,n %%r0, %0, 0 \n"
|
|
" sync \n"
|
|
: "=r" (lockheld), "+m" (vmmap_lock));
|
|
if (lockheld)
|
|
break;
|
|
error = tsleep((caddr_t)&vmmap_lock,
|
|
PZERO | PCATCH,
|
|
"mmrw", 0);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
/* Temporarily map the memory at vmmap. */
|
|
prot = uio->uio_rw == UIO_READ ? VM_PROT_READ :
|
|
VM_PROT_WRITE;
|
|
pmap_enter(pmap_kernel(), (vaddr_t)vmmap,
|
|
trunc_page(v), prot, prot|PMAP_WIRED);
|
|
pmap_update(pmap_kernel());
|
|
o = v & PGOFSET;
|
|
c = min(uio->uio_resid, (int)(PAGE_SIZE - o));
|
|
error = uiomove((caddr_t)vmmap + o, c, uio);
|
|
pmap_remove(pmap_kernel(), (vaddr_t)vmmap,
|
|
(vaddr_t)vmmap + PAGE_SIZE);
|
|
pmap_update(pmap_kernel());
|
|
break;
|
|
|
|
case DEV_KMEM: /* /dev/kmem */
|
|
v = uio->uio_offset;
|
|
use_kmem:
|
|
o = v & PGOFSET;
|
|
c = min(uio->uio_resid, (int)(PAGE_SIZE - o));
|
|
rw = (uio->uio_rw == UIO_READ) ? B_READ : B_WRITE;
|
|
if (!uvm_kernacc((caddr_t)v, c, rw)) {
|
|
error = EFAULT;
|
|
/* this will break us out of the loop */
|
|
continue;
|
|
}
|
|
error = uiomove((caddr_t)v, c, uio);
|
|
break;
|
|
|
|
case DEV_NULL: /* /dev/null */
|
|
if (uio->uio_rw == UIO_WRITE)
|
|
uio->uio_resid = 0;
|
|
return (0);
|
|
|
|
case DEV_ZERO: /* /dev/zero */
|
|
/* Write to /dev/zero is ignored. */
|
|
if (uio->uio_rw == UIO_WRITE) {
|
|
uio->uio_resid = 0;
|
|
return (0);
|
|
}
|
|
/*
|
|
* On the first call, allocate and zero a page
|
|
* of memory for use with /dev/zero.
|
|
*/
|
|
if (zeropage == NULL) {
|
|
zeropage = (caddr_t)
|
|
malloc(PAGE_SIZE, M_TEMP, M_WAITOK);
|
|
memset(zeropage, 0, PAGE_SIZE);
|
|
}
|
|
c = min(iov->iov_len, PAGE_SIZE);
|
|
error = uiomove(zeropage, c, uio);
|
|
break;
|
|
|
|
default:
|
|
return (ENXIO);
|
|
}
|
|
}
|
|
|
|
/* If we hold the vmmap lock, release it. */
|
|
if (lockheld) {
|
|
__asm __volatile(
|
|
" sync \n"
|
|
" stw %1, %0 \n"
|
|
: "+m" (vmmap_lock) : "r" (1));
|
|
wakeup((caddr_t)&vmmap_lock);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
paddr_t
|
|
mmmmap(dev, off, prot)
|
|
dev_t dev;
|
|
off_t off;
|
|
int prot;
|
|
{
|
|
if (minor(dev) != 0)
|
|
return (-1);
|
|
|
|
/*
|
|
* Allow access only in RAM.
|
|
*/
|
|
#if 0
|
|
if (off < ctob(firstusablepage) ||
|
|
off >= ctob(lastusablepage + 1))
|
|
return (-1);
|
|
#endif
|
|
return (btop(off));
|
|
}
|