xref: /illumos-gate/usr/src/cmd/mdb/i86pc/modules/common/apic_common.c (revision 6a634c9dca3093f3922e4b7ab826d7bdf17bf78e)

/*
 * 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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
 */

#include "intr_common.h"

#ifdef _KMDB

/* Macros for reading/writing the IOAPIC RDT entries */
#define	APIC_READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, ipin) \
	apic_ioapic_read(ioapic_ix, APIC_RDT_CMD + (2 * (ipin)))

#define	APIC_READ_IOAPIC_RDT_ENTRY_HIGH_DWORD(ioapic_ix, ipin) \
	apic_ioapic_read(ioapic_ix, APIC_RDT_CMD2 + (2 * (ipin)))

static uint32_t *ioapic_adr[MAX_IO_APIC];

static uint32_t
apic_ioapic_read(int ioapic_ix, uint32_t reg)
{
	volatile uint32_t *ioapic;

	ioapic = ioapic_adr[ioapic_ix];
	ioapic[APIC_IO_REG] = reg;
	return (ioapic[APIC_IO_DATA]);
}

/*
 * ioapic dcmd - Print out the ioapic registers, nicely formatted.
 */
/*ARGSUSED*/
int
ioapic(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
	uint32_t apic_io_max;
	int	reg;
	int	reg_max;
	int	i;


	if ((flags & DCMD_ADDRSPEC) || argc != 0)
		return (DCMD_USAGE);

	if (mdb_readvar(&ioapic_adr, "apicioadr") == -1) {
		/*
		 * If the mdb_warn string does not end in a \n, mdb will
		 * automatically append the reason for the failure.
		 */
		mdb_warn("failed to read ioapicadr");
		return (DCMD_ERR);
	}

	if (mdb_readvar(&apic_io_max, "apic_io_max") == -1) {
		/*
		 * If the mdb_warn string does not end in a \n, mdb will
		 * automatically append the reason for the failure.
		 */
		mdb_warn("failed to read apic_io_max");
		return (DCMD_ERR);
	}

	mdb_printf("ioapicadr\t%p\n", ioapic_adr);

	for (i = 0; i < apic_io_max; i++) {
		/* Bits 23-16 define the maximum redirection entries */
		reg_max = apic_ioapic_read(i, APIC_VERS_CMD);
		reg_max = (reg_max >> 16) & 0xff;

		mdb_printf("%4s %8s %8s\n", "reg", "high", " low");
		for (reg = 0; reg <= reg_max; reg++) {
			uint32_t high, low;

			high = APIC_READ_IOAPIC_RDT_ENTRY_HIGH_DWORD(i, reg);
			low = APIC_READ_IOAPIC_RDT_ENTRY_LOW_DWORD(i, reg);

			mdb_printf("%2d   %8x %8x\n", reg, high, low);
		}

		mdb_printf("\n");

	}

	return (DCMD_OK);
}


/*
 * apic dcmd - Print out the apic registers, nicely formatted.
 */
/*ARGSUSED*/
int
apic(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
	uint32_t *papic;

	if ((flags & DCMD_ADDRSPEC) || argc != 0)
		return (DCMD_USAGE);

	if (mdb_readvar(&papic, "apicadr") == -1) {
		/*
		 * If the mdb_warn string does not end in a \n, mdb will
		 * automatically append the reason for the failure.
		 */
		mdb_warn("failed to read apicadr");
		return (DCMD_ERR);
	}

	mdb_printf("apicadr\t%p\n", papic);
	mdb_printf("as_task_reg\t%x\n", papic[APIC_TASK_REG]);
	mdb_printf("as_dest_reg\t%x\n", papic[APIC_DEST_REG]);
	mdb_printf("as_format_reg\t%x\n", papic[APIC_FORMAT_REG]);
	mdb_printf("as_local_timer\t%x\n", papic[APIC_LOCAL_TIMER]);
	mdb_printf("as_pcint_vect\t%x\n", papic[APIC_PCINT_VECT]);
	mdb_printf("as_int_vect0\t%x\n", papic[APIC_INT_VECT0]);
	mdb_printf("as_int_vect1\t%x\n", papic[APIC_INT_VECT1]);
	mdb_printf("as_err_vect\t%x\n", papic[APIC_ERR_VECT]);
	mdb_printf("as_init_count\t%x\n", papic[APIC_INIT_COUNT]);
	mdb_printf("as_divide_reg\t%x\n", papic[APIC_DIVIDE_REG]);
	mdb_printf("as_spur_int_reg\t%x\n", papic[APIC_SPUR_INT_REG]);

	return (DCMD_OK);
}

#endif /* _KMDB */