as.c

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/*
 * Copyright (c) 2006 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.
 */

#include <as.h>
#include <libc.h>
#include <errno.h>
#include <unistd.h>
#include <align.h>
#include <sys/types.h>
#include <bitops.h>
#include <malloc.h>
#include "private/libc.h"

void *as_area_create(void *address, size_t size, unsigned int flags)
{
        return (void *) __SYSCALL3(SYS_AS_AREA_CREATE, (sysarg_t) address,
            (sysarg_t) size, (sysarg_t) flags);
}

int as_area_resize(void *address, size_t size, unsigned int flags)
{
        return __SYSCALL3(SYS_AS_AREA_RESIZE, (sysarg_t) address,
            (sysarg_t) size, (sysarg_t) flags);
}

int as_area_destroy(void *address)
{
        return __SYSCALL1(SYS_AS_AREA_DESTROY, (sysarg_t) address);
}

int as_area_change_flags(void *address, unsigned int flags)
{
        return __SYSCALL2(SYS_AS_AREA_CHANGE_FLAGS, (sysarg_t) address,
            (sysarg_t) flags);
}

void *as_get_mappable_page(size_t size)
{
        return (void *) __SYSCALL2(SYS_AS_GET_UNMAPPED_AREA,
            (sysarg_t) __entry, (sysarg_t) size);
}

int as_get_physical_mapping(void *address, uintptr_t *frame)
{
        uintptr_t tmp_frame;
        uintptr_t virt = (uintptr_t) address;
        
        int rc = (int) __SYSCALL2(SYS_PAGE_FIND_MAPPING,
            (sysarg_t) virt, (sysarg_t) &tmp_frame);
        if (rc != EOK) {
                return rc;
        }
        
        if (frame != NULL) {
                *frame = tmp_frame;
        }
        
        return EOK;
}

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