File: [local] / sys / arch / sparc / sparc / mem.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:07:56 2008 UTC (16 years, 6 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
|
/* $OpenBSD: mem.c,v 1.21 2003/06/02 23:27:55 millert Exp $ */
/* $NetBSD: mem.c,v 1.13 1996/03/30 21:12:16 christos Exp $ */
/*
* 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.
*
* 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.
*
* @(#)mem.c 8.3 (Berkeley) 1/12/94
*/
/*
* Memory special file
*/
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sparc/sparc/vaddrs.h>
#include <machine/eeprom.h>
#include <machine/conf.h>
#include <uvm/uvm_extern.h>
extern vaddr_t prom_vstart;
extern vaddr_t prom_vend;
caddr_t zeropage;
vaddr_t mem_page;
/*ARGSUSED*/
int
mmopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
switch (minor(dev)) {
case 0:
case 1:
case 2:
case 11:
case 12:
return (0);
default:
return (ENXIO);
}
}
/*ARGSUSED*/
int
mmclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
return (0);
}
/*ARGSUSED*/
int
mmrw(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
int o;
paddr_t pa;
vaddr_t va;
int c;
struct iovec *iov;
int error = 0;
static int physlock;
if (minor(dev) == 0) {
/* lock against other uses of shared mem_page */
while (physlock > 0) {
physlock++;
error = tsleep((caddr_t)&physlock, PZERO | PCATCH,
"mmrw", 0);
if (error)
return (error);
}
physlock = 1;
if (mem_page == 0)
mem_page = uvm_km_valloc_wait(kernel_map, NBPG);
if (mem_page == 0)
panic("mmrw: out of space in kernel_map");
}
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)) {
/* minor device 0 is physical memory */
case 0:
pa = (paddr_t)uio->uio_offset;
if (!pmap_pa_exists(pa)) {
error = EFAULT;
goto unlock;
}
pmap_enter(pmap_kernel(), mem_page,
trunc_page(pa), uio->uio_rw == UIO_READ ?
VM_PROT_READ : VM_PROT_WRITE, PMAP_WIRED);
pmap_update(pmap_kernel());
o = uio->uio_offset & PGOFSET;
c = min(uio->uio_resid, (int)(NBPG - o));
error = uiomove((caddr_t)mem_page + o, c, uio);
pmap_remove(pmap_kernel(), mem_page, mem_page + NBPG);
pmap_update(pmap_kernel());
continue;
/* minor device 1 is kernel memory */
case 1:
va = (vaddr_t)uio->uio_offset;
if (va >= MSGBUF_VA && va < MSGBUF_VA+NBPG) {
c = min(iov->iov_len, 4096);
} else if (va >= prom_vstart && va < prom_vend &&
uio->uio_rw == UIO_READ) {
/* Allow read-only access to the PROM */
c = min(iov->iov_len, prom_vend - prom_vstart);
} else {
c = min(iov->iov_len, MAXPHYS);
if (!uvm_kernacc((caddr_t)va, c,
uio->uio_rw == UIO_READ ? B_READ : B_WRITE))
return (EFAULT);
}
error = uiomove((caddr_t)va, c, uio);
continue;
/* minor device 2 is EOF/RATHOLE */
case 2:
if (uio->uio_rw == UIO_WRITE)
uio->uio_resid = 0;
return (0);
/* XXX should add sbus, etc */
#if defined(SUN4)
/* minor device 11 (/dev/eeprom) is the old-style (a'la Sun 3) EEPROM */
case 11:
if (cputyp == CPU_SUN4)
error = eeprom_uio(uio);
else
error = ENXIO;
continue;
#endif /* SUN4 */
/* minor device 12 (/dev/zero) is source of nulls on read, rathole on write */
case 12:
if (uio->uio_rw == UIO_WRITE) {
uio->uio_resid = 0;
return 0;
}
if (zeropage == NULL) {
zeropage = (caddr_t)
malloc(PAGE_SIZE, M_TEMP, M_WAITOK);
bzero(zeropage, PAGE_SIZE);
}
c = min(iov->iov_len, PAGE_SIZE);
error = uiomove(zeropage, c, uio);
continue;
default:
return (ENXIO);
}
}
if (minor(dev) == 0) {
unlock:
if (physlock > 1)
wakeup((caddr_t)&physlock);
physlock = 0;
}
return (error);
}
paddr_t
mmmmap(dev, off, prot)
dev_t dev;
off_t off;
int prot;
{
return (-1);
}
/*ARGSUSED*/
int
mmioctl(dev, cmd, data, flags, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flags;
struct proc *p;
{
return (EOPNOTSUPP);
}