source: rtems/bsps/sparc64/include/arch/mm/sun4u/tte.h @ 0a9b4513

/*
 * Copyright (c) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup RTEMSBSPsSPARC64mm      
 * @{
 */
/** @file
 */

#ifndef KERN_sparc64_sun4u_TTE_H_
#define KERN_sparc64_sun4u_TTE_H_

#define TTE_G           (1 << 0)
#define TTE_W           (1 << 1)
#define TTE_P           (1 << 2)
#define TTE_E           (1 << 3)
#define TTE_CV          (1 << 4)
#define TTE_CP          (1 << 5)
#define TTE_L           (1 << 6)

#define TTE_V_SHIFT     63
#define TTE_SIZE_SHIFT  61

#ifndef __ASM__

#include <arch/types.h>

/* TTE tag's VA_tag field contains bits <63:VA_TAG_PAGE_SHIFT> of the VA */
#define VA_TAG_PAGE_SHIFT       22

/** Translation Table Entry - Tag. */
union tte_tag {
        uint64_t value;
        struct {
                unsigned g : 1;         /**< Global. */
                unsigned : 2;           /**< Reserved. */
                unsigned context : 13;  /**< Context identifier. */
                unsigned : 6;           /**< Reserved. */
                uint64_t va_tag : 42;   /**< Virtual Address Tag, bits 63:22. */
        } __attribute__ ((packed));
};

typedef union tte_tag tte_tag_t;

/** Translation Table Entry - Data. */
union tte_data {
        uint64_t value;
        struct {
                unsigned v : 1;         /**< Valid. */
                unsigned size : 2;      /**< Page size of this entry. */
                unsigned nfo : 1;       /**< No-Fault-Only. */
                unsigned ie : 1;        /**< Invert Endianness. */
                unsigned soft2 : 9;     /**< Software defined field. */
#if defined (US)
                unsigned diag : 9;      /**< Diagnostic data. */
                unsigned pfn : 28;      /**< Physical Address bits, bits 40:13. */
#elif defined (US3)
                unsigned : 7;           /**< Reserved. */
                unsigned pfn : 30;      /**< Physical Address bits, bits 42:13 */
#endif
                unsigned soft : 6;      /**< Software defined field. */
                unsigned l : 1;         /**< Lock. */
                unsigned cp : 1;        /**< Cacheable in physically indexed cache. */
                unsigned cv : 1;        /**< Cacheable in virtually indexed cache. */
                unsigned e : 1;         /**< Side-effect. */
                unsigned p : 1;         /**< Privileged. */
                unsigned w : 1;         /**< Writable. */
                unsigned g : 1;         /**< Global. */
        } __attribute__ ((packed));
};

typedef union tte_data tte_data_t;

#endif /* !def __ASM__ */

#endif

/** @}
 */