mach_descrip.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/machsystm.h>
#include <sys/vm.h>
#include <sys/cpu.h>
#include <sys/intreg.h>
#include <sys/machcpuvar.h>
#include <sys/machparam.h>
#include <vm/hat_sfmmu.h>
#include <vm/seg_kmem.h>
#include <sys/error.h>
#include <sys/hypervisor_api.h>
#include <sys/types.h>
#include <sys/kstat.h>
#ifdef MACH_DESC_DEBUG
#include <sys/promif.h> /* for prom_printf */
#endif
#include <sys/sysmacros.h>
#include <sys/mach_descrip.h>
/*
* Basic code to pull in the machine description from the Hypervisor
* An equivalent to this should really be available from mlsetup
* for really early info, but for the time being we are content to
* invoke this from startup_end once the VM system has been initialised.
* To do this we use the intrq allocator which means that
* this function should be called after intrq_init();
* We try and do this early enough however that it is useful to other
* components within the kernel.
* Also, user-level entities can grab the machine description via
* kstat and/or the mdesc device driver.
*/
machine_descrip_t machine_descrip;
#ifdef MACH_DESC_DEBUG
#define MDP(ARGS) prom_printf ARGS
static void
dump_buf(uint8_t *bufp, int size)
{
int i;
for (i = 0; i < size; i += 16) {
int j;
prom_printf("0x%04x :", i);
for (j = 0; j < 16 && (i+j) < size; j++)
prom_printf(" %02x", bufp[i+j]);
prom_printf("\n");
}
}
#else
#define MDP(x)
#endif
void
mach_descrip_init(void)
{
uint64_t md_size, ret;
MDP(("MD: Requesting buffer size\n"));
md_size = 0LL;
(void) hv_mach_desc((uint64_t)0, &md_size);
MDP(("MD: buffer size is %d\n", md_size));
/* Round allocated space to nearest page */
machine_descrip.space = P2ROUNDUP(md_size, PAGESIZE);
MDP(("MD: allocated space is %d\n", machine_descrip.space));
machine_descrip.va = contig_mem_alloc(machine_descrip.space);
if (machine_descrip.va == NULL)
cmn_err(CE_PANIC, "Allocation for machine description failed");
MDP(("MD: allocated va = 0x%p (size 0x%llx)\n",
machine_descrip.va, machine_descrip.space));
machine_descrip.pa = va_to_pa(machine_descrip.va);
MDP(("MD: allocated pa = 0x%llx\n", machine_descrip.pa));
ret = hv_mach_desc(machine_descrip.pa, &md_size);
MDP(("MD: HV return code = %ld\n", ret));
if (ret != H_EOK) {
MDP(("MD: Failed with code %ld from HV\n", ret));
machine_descrip.size = 0;
} else {
MDP(("MD: Grabbed %d bytes from HV\n", md_size));
#ifdef MACH_DESC_DEBUG
dump_buf((uint8_t *)machine_descrip.va, md_size);
#endif /* MACH_DESC_DEBUG */
machine_descrip.size = md_size;
/*
* Allocate the kstat to get at the data
*/
machine_descrip.ksp = kstat_create("unix", 0, "machdesc",
"misc",
KSTAT_TYPE_RAW,
(uint_t)machine_descrip.size,
KSTAT_FLAG_VIRTUAL);
if (machine_descrip.ksp == NULL) {
cmn_err(CE_PANIC,
"Failed to create kstat for machine description");
} else {
machine_descrip.ksp->ks_data = machine_descrip.va;
kstat_install(machine_descrip.ksp);
}
}
}