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/*
* 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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* 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>
static void
kdi_system_claim(void)
{
psm_notifyf(PSM_DEBUG_ENTER);
}
static void
kdi_system_release(void)
{
psm_notifyf(PSM_DEBUG_EXIT);
}
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)
static uintptr_t
kdi_gdt2gsbase(uintptr_t gdtbase)
{
return ((uintptr_t)kdi_gdt2cpu(gdtbase));
}
#endif
static void
kdi_cpu_iter(void (*iter)(cpu_t *, uint_t), uint_t arg)
{
cpu_t *cp;
mutex_enter(&cpu_lock);
cp = cpu_list;
do {
iter(cp, arg);
} while ((cp = cp->cpu_next) != cpu_list);
mutex_exit(&cpu_lock);
}
static gate_desc_t *
curidt(void)
{
desctbr_t idtdesc;
rd_idtr(&idtdesc);
return ((gate_desc_t *)idtdesc.dtr_base);
}
static void
kdi_idt_init_gate(gate_desc_t *gate, void (*hdlr)(void), uint_t dpl,
int useboot)
{
bzero(gate, sizeof (gate_desc_t));
#if defined(__amd64)
set_gatesegd(gate, hdlr, (useboot ? B64CODE_SEL : KCS_SEL), 0,
SDT_SYSIGT, dpl);
#else
set_gatesegd(gate, hdlr, (useboot ? BOOTCODE_SEL : KCS_SEL), 0,
SDT_SYSIGT, dpl);
#endif
}
static void
kdi_idt_read(gate_desc_t *idt, gate_desc_t *gatep, uint_t vec)
{
if (idt == NULL)
idt = curidt();
*gatep = idt[vec];
}
static void
kdi_idt_write(gate_desc_t *idt, gate_desc_t *gate, uint_t vec)
{
if (idt == NULL)
idt = curidt();
idt[vec] = *gate;
}
static gate_desc_t *
kdi_cpu2idt(cpu_t *cp)
{
if (cp == NULL)
cp = CPU;
return (cp->cpu_idt);
}
void
kdi_flush_caches(void)
{
reload_cr3();
}
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);
}
static void
kdi_plat_call(void (*platfn)(void))
{
if (platfn != NULL)
platfn();
}
void
mach_kdi_init(kdi_t *kdi)
{
kdi->kdi_plat_call = kdi_plat_call;
kdi->mkdi_get_cpuinfo = kdi_get_cpuinfo;
kdi->mkdi_xc_initialized = kdi_xc_initialized;
kdi->mkdi_xc_others = kdi_xc_others;
kdi->mkdi_get_userlimit = kdi_get_userlimit;
kdi->mkdi_idt_init_gate = kdi_idt_init_gate;
kdi->mkdi_idt_read = kdi_idt_read;
kdi->mkdi_idt_write = kdi_idt_write;
kdi->mkdi_cpu2idt = kdi_cpu2idt;
kdi->mkdi_shutdownp = &psm_shutdownf;
#if defined(__amd64)
kdi->mkdi_gdt2gsbase = &kdi_gdt2gsbase;
#endif
kdi->mkdi_cpu_iter = kdi_cpu_iter;
}
/*ARGSUSED*/
void
mach_kdi_fini(kdi_t *kdi)
{
hat_kdi_fini();
}
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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