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/* $OpenBSD: pdc.c,v 1.1 1998/06/23 18:46:42 mickey Exp $ */
/*
* Copyright 1996 1995 by Open Software Foundation, Inc.
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation.
*
* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
/*
* Copyright (c) 1990 mt Xinu, Inc. All rights reserved.
* Copyright (c) 1990 University of Utah. All rights reserved.
*
* This file may be freely distributed in any form as long as
* this copyright notice is included.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Utah $Hdr: pdc.c 1.8 92/03/14$
*/
#include <sys/time.h>
#include "libsa.h"
#include <sys/reboot.h>
#include <sys/disklabel.h>
#include "dev_hppa.h"
#include <machine/pdc.h>
#include <machine/iodc.h>
#include <machine/iomod.h>
#include <machine/nvm.h>
#define MIN(a,b) ((a) < (b) ? (a) : (b))
/*
* Interface routines to initialize and access the PDC.
*/
int (*pdc)();
int pdcbuf[64] __attribute ((aligned(8))); /* PDC return buffer */
struct stable_storage sstor; /* contents of Stable Storage */
int sstorsiz; /* size of Stable Storage */
unsigned int rstaddr;
struct bootdata bd;
int bdsize = sizeof(struct bootdata);
unsigned int chasdata;
extern unsigned int howto, bootdev;
/*
* Initialize PDC and related variables.
*/
void
pdc_init()
{
int err;
/*
* Initialize important global variables (defined above).
*/
pdc = PAGE0->mem_pdc;
err = (*pdc)(PDC_STABLE, PDC_STABLE_SIZE, pdcbuf, 0, 0);
if (err >= 0) {
sstorsiz = MIN(pdcbuf[0],sizeof(sstor));
err = (*pdc)(PDC_STABLE, PDC_STABLE_READ, 0, &sstor, sstorsiz);
}
/*
* Now that we (may) have an output device, if we encountered
* an error reading Stable Storage (above), let them know.
*/
if (err)
printf("Stable storage PDC_STABLE Read Ret'd %d\n", err);
/*
* Clear the FAULT light (so we know when we get a real one)
*/
chasdata = PDC_OSTAT(PDC_OSTAT_BOOT) | 0xCEC0;
(void) (*pdc)(PDC_CHASSIS, PDC_CHASSIS_DISP, chasdata);
}
/*
* Read in `bootdev' and `howto' from Non-Volatile Memory.
*/
void
getbinfo()
{
int err;
/*
* Try to read bootdata from NVM through PDC.
* If successful, set `howto' and `bootdev'.
*/
if ((err = (*pdc)(PDC_NVM, PDC_NVM_READ, NVM_BOOTDATA, &bd, bdsize)) < 0) {
/*
* First, determine if this machine has Non-Volatile Memory.
* If not, just return (until we come up with a new plan)!
*/
if (err == -1) /* Nonexistent procedure */
return;
printf("NVM bootdata Read ret'd %d\n", err);
} else {
if (bd.cksum == NVM_BOOTCKSUM(bd)) {
/*
* The user may override the PDC auto-boot, setting
* an interactive boot. We give them this right by
* or'ing the bootaddr flags into `howto'.
*/
howto |= bd.flags;
bootdev = bd.device;
} else {
printf("NVM bootdata Bad Checksum (%x)\n", bd.cksum);
}
}
/*
* Reset the bootdata to defaults (if necessary).
*/
if (bd.flags != RB_AUTOBOOT || bd.device != 0) {
bd.flags = RB_AUTOBOOT;
bd.device = 0;
bd.cksum = NVM_BOOTCKSUM(bd);
if ((err = (*pdc)(PDC_NVM, PDC_NVM_WRITE, NVM_BOOTDATA,
&bd, bdsize)) < 0)
printf("NVM bootdata Write ret'd %d\n", err);
}
}
/*
* Generic READ/WRITE through IODC. Takes pointer to PDC device
* information, returns (positive) number of bytes actually read or
* the (negative) error condition, or zero if at "EOF".
*/
int
iodc_rw(maddr, daddr, count, func, pzdev)
char * maddr; /* io->i_ma = labelbuf */
unsigned int daddr;
unsigned int count; /* io->i_cc = DEV_BSIZE */
int func;
struct pz_device *pzdev;
{
register int offset;
register int xfer_cnt = 0;
register int ret;
if (pzdev == 0) /* default: use BOOT device */
pzdev = &PAGE0->mem_boot;
if (pzdev->pz_iodc_io == 0)
return(-1);
/*
* IODC arguments are constrained in a number of ways. If the
* request doesn't fit one or more of these constraints, we have
* to do the transfer to a buffer and copy it.
*/
if ((((int)maddr)&(MINIOSIZ-1))||(count&IOPGOFSET)||(daddr&IOPGOFSET))
for (; count > 0; count -= ret, maddr += ret, daddr += ret) {
offset = daddr & IOPGOFSET;
if ((ret = (*pzdev->pz_iodc_io)(pzdev->pz_hpa,
(func == F_READ)? IODC_IO_BOOTIN:
IODC_IO_BOOTOUT,
pzdev->pz_spa, pzdev->pz_layers, pdcbuf,
daddr - offset, btbuf, BTIOSIZ,
BTIOSIZ)) < 0)
return (ret);
if ((ret = pdcbuf[0]) == 0)
break;
if ((ret -= offset) > count)
ret = count;
bcopy(btbuf + offset, maddr, ret);
xfer_cnt += ret;
}
else
for (; count > 0; count -= ret, maddr += ret, daddr += ret) {
if ((offset = count) > MAXIOSIZ)
offset = MAXIOSIZ;
if ((ret = (*pzdev->pz_iodc_io)(pzdev->pz_hpa,
(func == F_READ)? IODC_IO_BOOTIN:
IODC_IO_BOOTOUT,
pzdev->pz_spa, pzdev->pz_layers,
pdcbuf, daddr, maddr, offset,
count)) < 0)
return (ret);
if ((ret = pdcbuf[0]) == 0)
break;
xfer_cnt += ret;
}
return (xfer_cnt);
}
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