843e19887f64dde75055cf8842fc4db2171eff45johnlev * CDDL HEADER START
843e19887f64dde75055cf8842fc4db2171eff45johnlev * The contents of this file are subject to the terms of the
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Common Development and Distribution License (the "License").
843e19887f64dde75055cf8842fc4db2171eff45johnlev * You may not use this file except in compliance with the License.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
843e19887f64dde75055cf8842fc4db2171eff45johnlev * See the License for the specific language governing permissions
843e19887f64dde75055cf8842fc4db2171eff45johnlev * and limitations under the License.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * When distributing Covered Code, include this CDDL HEADER in each
843e19887f64dde75055cf8842fc4db2171eff45johnlev * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * If applicable, add the following below this CDDL HEADER, with the
843e19887f64dde75055cf8842fc4db2171eff45johnlev * fields enclosed by brackets "[]" replaced with your own identifying
843e19887f64dde75055cf8842fc4db2171eff45johnlev * information: Portions Copyright [yyyy] [name of copyright owner]
843e19887f64dde75055cf8842fc4db2171eff45johnlev * CDDL HEADER END
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Use is subject to license terms.
843e19887f64dde75055cf8842fc4db2171eff45johnlev#pragma ident "%Z%%M% %I% %E% SMI"
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Kernel/Debugger Interface (KDI) routines. Called during debugger under
843e19887f64dde75055cf8842fc4db2171eff45johnlev * various system states (boot, while running, while the debugger has control).
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Functions intended for use while the debugger has control may not grab any
843e19887f64dde75055cf8842fc4db2171eff45johnlev * locks or perform any functions that assume the availability of other system
843e19887f64dde75055cf8842fc4db2171eff45johnlev * services.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * These are not safe against dropping into kmdb when fbt::: is active. This is
843e19887f64dde75055cf8842fc4db2171eff45johnlev * also broken on i86pc...
843e19887f64dde75055cf8842fc4db2171eff45johnlev uint_t nidt = (idtr->dtr_limit + 1) / sizeof (*idt);
843e19887f64dde75055cf8842fc4db2171eff45johnlev * See kdi_idtr_set().
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (__hypercall1(__HYPERVISOR_get_debugreg, (long)reg));
843e19887f64dde75055cf8842fc4db2171eff45johnlev (void) __hypercall2(__HYPERVISOR_set_debugreg, (long)reg, value);
843e19887f64dde75055cf8842fc4db2171eff45johnlev * To avoid domains sucking up CPU while sitting in kmdb, we make all the slave
843e19887f64dde75055cf8842fc4db2171eff45johnlev * CPUs wait for a wake-up evtchn. The master CPU, meanwhile, sleeps for
843e19887f64dde75055cf8842fc4db2171eff45johnlev * console activity.
843e19887f64dde75055cf8842fc4db2171eff45johnlevextern void kdi_slave_entry(void);
843e19887f64dde75055cf8842fc4db2171eff45johnlev for (c = 0; c < NCPU; c++) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (cpu[c] == NULL || !(cpu[c]->cpu_flags & CPU_READY))
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*ARGSUSED*/
843e19887f64dde75055cf8842fc4db2171eff45johnlev * These routines are called -extremely- early, during kmdb initialization.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Many common kernel functions assume that %gs has been initialized,
843e19887f64dde75055cf8842fc4db2171eff45johnlev * and fail horribly if it hasn't. At this point, the boot code has
843e19887f64dde75055cf8842fc4db2171eff45johnlev * reserved a descriptor for us (KMDBGS_SEL) in it's GDT; arrange for it
843e19887f64dde75055cf8842fc4db2171eff45johnlev * to point at a dummy cpu_t, temporarily at least.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Note that kmdb entry relies on the fake cpu_t having zero cpu_idt/cpu_id.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * (Note that we had better switch to a -new- GDT before
843e19887f64dde75055cf8842fc4db2171eff45johnlev * we discard the KM_TMP mappings, or disaster will ensue.)
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (HYPERVISOR_set_gdt(ma, PAGESIZE / sizeof (user_desc_t)))
843e19887f64dde75055cf8842fc4db2171eff45johnlev panic("boot_kdi_tmpinit:HYPERVISOR_set_gdt() failed");
843e19887f64dde75055cf8842fc4db2171eff45johnlev load_segment_registers(B64CODE_SEL, 0, 0, B32DATA_SEL);
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Now point %gsbase to our temp cpu structure.
843e19887f64dde75055cf8842fc4db2171eff45johnlev xen_set_segment_base(SEGBASE_GS_KERNEL, (ulong_t)cpu);
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*ARGSUSED*/
843e19887f64dde75055cf8842fc4db2171eff45johnlev * This breaks, why do we need it anyway?
843e19887f64dde75055cf8842fc4db2171eff45johnlev#if 0 /* XXPV */
843e19887f64dde75055cf8842fc4db2171eff45johnlev load_segment_registers(B64CODE_SEL, 0, KMDBGS_SEL, B32DATA_SEL);
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Sigh. We're called before we've initialized the kernels GDT, living
843e19887f64dde75055cf8842fc4db2171eff45johnlev * off the hypervisor's default GDT. For kmdb's sake, we switch now to
843e19887f64dde75055cf8842fc4db2171eff45johnlev * a GDT that looks like dboot's GDT; very shortly we'll initialize and
843e19887f64dde75055cf8842fc4db2171eff45johnlev * switch to the kernel's GDT.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * (Note that we had better switch to a -new- GDT before
843e19887f64dde75055cf8842fc4db2171eff45johnlev * we discard the KM_TMP mappings, or disaster will ensue.)
843e19887f64dde75055cf8842fc4db2171eff45johnlev cpu, sizeof (*cpu), SDT_MEMRWA, SEL_KPL, SDP_BYTES, SDP_OP32);
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (HYPERVISOR_set_gdt(ma, PAGESIZE / sizeof (user_desc_t)))
843e19887f64dde75055cf8842fc4db2171eff45johnlev panic("boot_kdi_tmpinit:HYPERVISOR_set_gdt() failed");
843e19887f64dde75055cf8842fc4db2171eff45johnlev load_segment_registers(B32CODE_SEL, B32DATA_SEL, B32DATA_SEL, 0,
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*ARGSUSED*/
843e19887f64dde75055cf8842fc4db2171eff45johnlev load_segment_registers(B32CODE_SEL, B32DATA_SEL, B32DATA_SEL, 0,
843e19887f64dde75055cf8842fc4db2171eff45johnlev#endif /* __i386 */