source: rtems/bsps/sparc64/include/arch/mm/page.h @ 2802896

/*
 * 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_PAGE_H_
#define KERN_sparc64_PAGE_H_

#include <arch/mm/frame.h>

/*
 * On the TLB and TSB level, we still use 8K pages, which are supported by the
 * MMU.
 */
#define MMU_PAGE_WIDTH  MMU_FRAME_WIDTH
#define MMU_PAGE_SIZE   MMU_FRAME_SIZE

/*
 * On the page table level, we use 16K pages. 16K pages are not supported by
 * the MMU but we emulate them with pairs of 8K pages.
 */
#define PAGE_WIDTH      FRAME_WIDTH
#define PAGE_SIZE       FRAME_SIZE

#define MMU_PAGES_PER_PAGE      (1 << (PAGE_WIDTH - MMU_PAGE_WIDTH))

#ifdef KERNEL

#ifndef __ASM__

#include <arch/interrupt.h>

extern uintptr_t physmem_base;

#define KA2PA(x)        (((uintptr_t) (x)) + physmem_base)
#define PA2KA(x)        (((uintptr_t) (x)) - physmem_base)

typedef union {
        uintptr_t address;
        struct {
                uint64_t vpn : 51;              /**< Virtual Page Number. */
                unsigned offset : 13;           /**< Offset. */
        } __attribute__ ((packed));
} page_address_t;

extern void page_arch_init(void);

#endif /* !def __ASM__ */

#endif /* KERNEL */

#endif

/** @}
 */