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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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Kernel/Debugger Interface (KDI) routines. Called during debugger under
* various system states (boot, while running, while the debugger has control).
* Functions intended for use while the debugger has control may not grab any
* locks or perform any functions that assume the availability of other system
* services.
*/
#include <sys/systm.h>
#include <sys/x86_archext.h>
#include <sys/kdi_impl.h>
#include <sys/smp_impldefs.h>
#include <sys/psm_types.h>
#include <sys/segments.h>
#include <sys/archsystm.h>
#include <sys/controlregs.h>
#include <sys/trap.h>
#include <sys/kobj.h>
#include <sys/kobj_impl.h>
#include <sys/clock_impl.h>
static void
kdi_system_claim(void)
{
lbolt_debug_entry();
psm_notifyf(PSM_DEBUG_ENTER);
}
static void
kdi_system_release(void)
{
psm_notifyf(PSM_DEBUG_EXIT);
lbolt_debug_return();
}
static cpu_t *
kdi_gdt2cpu(uintptr_t gdtbase)
{
cpu_t *cp = cpu_list;
if (cp == NULL)
return (NULL);
do {
if (gdtbase == (uintptr_t)cp->cpu_gdt)
return (cp);
} while ((cp = cp->cpu_next) != cpu_list);
return (NULL);
}
#if defined(__amd64)
uintptr_t
kdi_gdt2gsbase(uintptr_t gdtbase)
{
return ((uintptr_t)kdi_gdt2cpu(gdtbase));
}
#endif
static uintptr_t
kdi_get_userlimit(void)
{
return (_userlimit);
}
static int
kdi_get_cpuinfo(uint_t *vendorp, uint_t *familyp, uint_t *modelp)
{
desctbr_t gdtr;
cpu_t *cpu;
/*
* CPU doesn't work until the GDT and gs/GSBASE have been set up.
* Boot-loaded kmdb will call us well before then, so we have to
* find the current cpu_t the hard way.
*/
rd_gdtr(&gdtr);
if ((cpu = kdi_gdt2cpu(gdtr.dtr_base)) == NULL ||
!cpuid_checkpass(cpu, 1))
return (EAGAIN); /* cpuid isn't done yet */
*vendorp = cpuid_getvendor(cpu);
*familyp = cpuid_getfamily(cpu);
*modelp = cpuid_getmodel(cpu);
return (0);
}
void
kdi_idtr_set(gate_desc_t *idt, size_t limit)
{
desctbr_t idtr;
/*
* This rare case could happen if we entered kmdb whilst still on the
* fake CPU set up by boot_kdi_tmpinit(). We're trying to restore the
* kernel's IDT that we saved on entry, but it was from the fake cpu_t
* rather than the real IDT (which is still boot's). It's unpleasant,
* but we just encode knowledge that it's idt0 we want to restore.
*/
if (idt == NULL)
idt = idt0;
CPU->cpu_m.mcpu_idt = idt;
idtr.dtr_base = (uintptr_t)idt;
idtr.dtr_limit = limit;
kdi_idtr_write(&idtr);
}
static void
kdi_plat_call(void (*platfn)(void))
{
if (platfn != NULL)
platfn();
}
/*
* On Intel, most of these are shared between i86*, so this is really an
* arch_kdi_init().
*/
void
mach_kdi_init(kdi_t *kdi)
{
kdi->kdi_plat_call = kdi_plat_call;
kdi->kdi_kmdb_enter = kmdb_enter;
kdi->mkdi_activate = kdi_activate;
kdi->mkdi_deactivate = kdi_deactivate;
kdi->mkdi_idt_switch = kdi_idt_switch;
kdi->mkdi_update_drreg = kdi_update_drreg;
kdi->mkdi_set_debug_msrs = kdi_set_debug_msrs;
kdi->mkdi_get_userlimit = kdi_get_userlimit;
kdi->mkdi_get_cpuinfo = kdi_get_cpuinfo;
kdi->mkdi_stop_slaves = kdi_stop_slaves;
kdi->mkdi_start_slaves = kdi_start_slaves;
kdi->mkdi_slave_wait = kdi_slave_wait;
kdi->mkdi_memrange_add = kdi_memrange_add;
kdi->mkdi_reboot = kdi_reboot;
}
void
plat_kdi_init(kdi_t *kdi)
{
kdi->pkdi_system_claim = kdi_system_claim;
kdi->pkdi_system_release = kdi_system_release;
}
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