NetBSD/sys/dev/arcbios/arcbios.c

214 lines
5.8 KiB
C

/* $NetBSD: arcbios.c,v 1.6 2002/09/06 13:18:43 gehenna Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: arcbios.c,v 1.6 2002/09/06 13:18:43 gehenna Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <dev/cons.h>
#include <sys/conf.h>
#include <dev/arcbios/arcbios.h>
#include <dev/arcbios/arcbiosvar.h>
const struct arcbios_spb *ARCBIOS_SPB;
const struct arcbios_fv *ARCBIOS;
char arcbios_sysid_vendor[ARCBIOS_SYSID_FIELDLEN + 1];
char arcbios_sysid_product[ARCBIOS_SYSID_FIELDLEN + 1];
char arcbios_system_identifier[64 + 1];
int arcbios_cngetc(dev_t);
void arcbios_cnputc(dev_t, int);
void arcbios_fetch_system_identifier(struct arcbios_component *,
struct arcbios_treewalk_context *);
struct consdev arcbios_cn = {
NULL, NULL, arcbios_cngetc, arcbios_cnputc, nullcnpollc, NULL,
NODEV, CN_NORMAL,
};
extern const struct cdevsw arcbios_cdevsw;
/*
* arcbios_init:
*
* Initialize the ARC BIOS.
*/
int
arcbios_init(vaddr_t pblkva)
{
int maj;
struct arcbios_sysid *sid;
ARCBIOS_SPB = (struct arcbios_spb *) pblkva;
switch (ARCBIOS_SPB->SPBSignature) {
case ARCBIOS_SPB_SIGNATURE:
case ARCBIOS_SPB_SIGNATURE_1:
/* Okay. */
break;
default:
/* Don't know what this is. */
return (1);
}
/* Initialize our pointer to the firmware vector. */
ARCBIOS = ARCBIOS_SPB->FirmwareVector;
/* Find the ARC BIOS console device major (needed by cnopen) */
maj = cdevsw_lookup_major(&arcbios_cdevsw);
arcbios_cn.cn_dev = makedev(maj, 0);
/* Initialize the bootstrap console. */
cn_tab = &arcbios_cn;
/*
* Fetch the system ID.
*/
sid = (*ARCBIOS->GetSystemId)();
if (sid != NULL) {
memcpy(arcbios_sysid_vendor, sid->VendorId,
sizeof(sid->VendorId));
arcbios_sysid_vendor[sizeof(sid->VendorId)] = '\0';
memcpy(arcbios_sysid_product, sid->ProductId,
sizeof(sid->ProductId));
arcbios_sysid_product[sizeof(sid->ProductId)] = '\0';
}
/*
* Fetch the identifier string from the `system' component.
* Machdep code will use this to initialize the system type.
*/
arcbios_tree_walk(arcbios_fetch_system_identifier, NULL);
return (0);
}
void
arcbios_fetch_system_identifier(struct arcbios_component *node,
struct arcbios_treewalk_context *atc)
{
switch (node->Class) {
case COMPONENT_CLASS_SystemClass:
arcbios_component_id_copy(node,
arcbios_system_identifier,
sizeof(arcbios_system_identifier));
atc->atc_terminate = 1;
break;
default:
break;
}
}
/****************************************************************************
* ARC component tree walking routines.
****************************************************************************/
static void
arcbios_subtree_walk(struct arcbios_component *node,
void (*func)(struct arcbios_component *, struct arcbios_treewalk_context *),
struct arcbios_treewalk_context *atc)
{
for (node = (*ARCBIOS->GetChild)(node);
node != NULL && atc->atc_terminate == 0;
node = (*ARCBIOS->GetPeer)(node)) {
(*func)(node, atc);
if (atc->atc_terminate)
return;
arcbios_subtree_walk(node, func, atc);
}
}
void
arcbios_tree_walk(void (*func)(struct arcbios_component *,
struct arcbios_treewalk_context *), void *cookie)
{
struct arcbios_treewalk_context atc;
atc.atc_cookie = cookie;
atc.atc_terminate = 0;
arcbios_subtree_walk(NULL, func, &atc);
}
void
arcbios_component_id_copy(struct arcbios_component *node,
char *dst, size_t dstsize)
{
dstsize--;
if (dstsize > node->IdentifierLength)
dstsize = node->IdentifierLength;
memcpy(dst, node->Identifier, dstsize);
dst[dstsize] = '\0';
}
/****************************************************************************
* Bootstrap console routines.
****************************************************************************/
int
arcbios_cngetc(dev_t dev)
{
uint32_t count;
char c;
(*ARCBIOS->Read)(ARCBIOS_STDIN, &c, 1, &count);
return (c);
}
void
arcbios_cnputc(dev_t dev, int c)
{
uint32_t count;
char ch = c;
(*ARCBIOS->Write)(ARCBIOS_STDOUT, &ch, 1, &count);
}