sun4v/sys/machthread.h

	machthread.h 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.
 */

#ifndef _SYS_MACHTHREAD_H
#define _SYS_MACHTHREAD_H

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/asi.h>
#include <sys/sun4asi.h>
#include <sys/machasi.h>
#include <sys/bitmap.h>

#ifdef  __cplusplus
extern "C" {
#endif

#ifdef  _ASM

#define THREAD_REG  %g7     /* pointer to current thread data */

/*
 * CPU_INDEX(r, scr)
 * Returns cpu id in r.
 */
#define CPU_INDEX(r, scr)       \
    mov SCRATCHPAD_CPUID, scr;  \
    ldxa    [scr]ASI_SCRATCHPAD, r

/*
 * Given a cpu id extract the appropriate word
 * in the cpuset mask for this cpu id.
 */
#if CPUSET_SIZE > CLONGSIZE
#define CPU_INDEXTOSET(base, index, scr)    \
    srl index, BT_ULSHIFT, scr;     \
    and index, BT_ULMASK, index;    \
    sll scr, CLONGSHIFT, scr;       \
    add base, scr, base
#else
#define CPU_INDEXTOSET(base, index, scr)
#endif  /* CPUSET_SIZE */


/*
 * Assembly macro to find address of the current CPU.
 * Used when coming in from a user trap - cannot use THREAD_REG.
 * Args are destination register and one scratch register.
 */
#define CPU_ADDR(reg, scr)      \
    .global cpu;            \
    CPU_INDEX(scr, reg);        \
    sll scr, CPTRSHIFT, scr;    \
    set cpu, reg;       \
    ldn [reg + scr], reg

#define CINT64SHIFT 3

/*
 * Assembly macro to find the physical address of the current CPU.
 * All memory references using VA must be limited to nucleus
 * memory to avoid any MMU side effect.
 */
#define CPU_PADDR(reg, scr)             \
    .global cpu_pa;                 \
    CPU_INDEX(scr, reg);                \
    sll scr, CINT64SHIFT, scr;          \
    set cpu_pa, reg;                \
    ldx [reg + scr], reg

#endif  /* _ASM */

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS_MACHTHREAD_H */