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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/fcntl.h>
#include <sys/promif.h>
#include <sys/prom_plat.h>
#include <sys/salib.h>
extern int is_sun4v;
/*
* Check if the CPU should default to 64-bit or not.
* UltraSPARC-1's default to 32-bit mode.
* Everything else defaults to 64-bit mode.
*/
/*
* Manufacturer codes for the CPUs we're interested in
*/
#define TI_JEDEC 0x17
#define SUNW_JEDEC 0x22
/*
* Implementation codes for the CPUs we're interested in
*/
#define IMPL_US_I 0x10
static pnode_t
visit(pnode_t node)
{
int impl, manu;
char name[32];
static char ultrasparc[] = "SUNW,UltraSPARC";
static char implementation[] = "implementation#";
static char manufacturer[] = "manufacturer#";
/*
* if name isn't 'SUNW,UltraSPARC', continue.
*/
if (prom_getproplen(node, "name") != sizeof (ultrasparc))
return ((pnode_t)0);
(void) prom_getprop(node, "name", name);
if (strncmp(name, ultrasparc, sizeof (ultrasparc)) != 0)
return ((pnode_t)0);
if (prom_getproplen(node, manufacturer) != sizeof (int))
return ((pnode_t)0);
(void) prom_getprop(node, manufacturer, (caddr_t)&manu);
if ((manu != SUNW_JEDEC) && (manu != TI_JEDEC))
return ((pnode_t)0);
if (prom_getproplen(node, implementation) != sizeof (int))
return ((pnode_t)0);
(void) prom_getprop(node, implementation, (caddr_t)&impl);
if (impl != IMPL_US_I)
return ((pnode_t)0);
return (node);
}
/*
* visit each node in the device tree, until we get a non-null answer
*/
static pnode_t
walk(pnode_t node)
{
pnode_t id;
if (visit(node))
return (node);
for (node = prom_childnode(node); node; node = prom_nextnode(node))
if ((id = walk(node)) != (pnode_t)0)
return (id);
return ((pnode_t)0);
}
/*
* Check if the CPU is an UltraSPARC-1 or not.
*/
int
cpu_is_ultrasparc_1(void)
{
static int cpu_checked;
static int cpu_default;
/*
* If we already checked or the machine is
* a sun4v, we already know the answer.
*/
if (!is_sun4v || cpu_checked == 0) {
if (walk(prom_rootnode()))
cpu_default = 1;
cpu_checked = 1;
}
return (cpu_default);
}
/*
* Retain a page or reclaim a previously retained page of physical
* memory for use by the prom upgrade. If successful, leave
* an indication that a page was retained by creating a boolean
* property in the root node.
*
* XXX: SUNW,retain doesn't work as expected on server systems,
* so we don't try to retain any memory on those systems.
*
* XXX: do a '0 to my-self' as a workaround for 4160914
*/
int dont_retain_memory;
void
retain_nvram_page(void)
{
unsigned long long phys = 0;
int len;
char name[32];
static char create_prop[] =
"0 to my-self dev / 0 0 \" boot-retained-page\" property";
static char ue10000[] = "SUNW,Ultra-Enterprise-10000";
static char ue[] = "SUNW,Ultra-Enterprise";
extern int verbosemode;
if (dont_retain_memory)
return;
if (!is_sun4v) {
len = prom_getproplen(prom_rootnode(), "name");
if ((len != -1) && (len <= sizeof (name))) {
(void) prom_getprop(prom_rootnode(), "name", name);
if ((strcmp(name, ue) == 0) ||
(strcmp(name, ue10000) == 0))
return;
}
}
if (prom_retain("OBPnvram", PAGESIZE, PAGESIZE, &phys) != 0) {
printf("prom_retain failed\n");
return;
}
if (verbosemode)
printf("retained OBPnvram page at 0x%llx\n", phys);
prom_interpret(create_prop, 0, 0, 0, 0, 0);
}
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