source: mainline/kernel/test/mm/mapping1.c@ a538808

/*
 * 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.
 */

#include <print.h>
#include <test.h>
#include <mm/page.h>
#include <mm/frame.h>
#include <mm/as.h>
#include <arch/mm/page.h>
#include <typedefs.h>
#include <debug.h>
#include <arch.h>

#define PAGE0  0x10000000
#define PAGE1  (PAGE0 + PAGE_SIZE)

#define VALUE0  UINT32_C(0x01234567)
#define VALUE1  UINT32_C(0x89abcdef)

const char *test_mapping1(void)
{
        uintptr_t frame0, frame1;
        uint32_t v0, v1;
        
        frame0 = (uintptr_t) frame_alloc(ONE_FRAME, FRAME_KA);
        frame1 = (uintptr_t) frame_alloc(ONE_FRAME, FRAME_KA);
        
        TPRINTF("Writing %#" PRIx32 " to physical address %p.\n",
            (uint32_t) VALUE0, (void *) KA2PA(frame0));
        *((uint32_t *) frame0) = VALUE0;
        
        TPRINTF("Writing %#" PRIx32 " to physical address %p.\n",
            (uint32_t) VALUE1, (void *) KA2PA(frame1));
        *((uint32_t *) frame1) = VALUE1;
        
        page_table_lock(AS, true);

        TPRINTF("Mapping virtual address %p to physical address %p.\n",
            (void *) PAGE0, (void *) KA2PA(frame0));
        page_mapping_insert(AS_KERNEL, PAGE0, KA2PA(frame0), PAGE_PRESENT | PAGE_WRITE);
        
        TPRINTF("Mapping virtual address %p to physical address %p.\n",
            (void *) PAGE1, (void *) KA2PA(frame1));
        page_mapping_insert(AS_KERNEL, PAGE1, KA2PA(frame1), PAGE_PRESENT | PAGE_WRITE);

        page_table_unlock(AS, true);
        
        v0 = *((uint32_t *) PAGE0);
        v1 = *((uint32_t *) PAGE1);
        TPRINTF("Value at virtual address %p is %#" PRIx32 ".\n",
            (void *) PAGE0, v0);
        TPRINTF("Value at virtual address %p is %#" PRIx32 ".\n",
            (void *) PAGE1, v1);
        
        if (v0 != VALUE0)
                return "Value at v0 not equal to VALUE0";
        if (v1 != VALUE1)
                return "Value at v1 not equal to VALUE1";
        
        TPRINTF("Writing %#" PRIx32 " to virtual address %p.\n",
            (uint32_t) 0, (void *) PAGE0);
        *((uint32_t *) PAGE0) = 0;
        
        TPRINTF("Writing %#" PRIx32 " to virtual address %p.\n",
            (uint32_t) 0, (void *) PAGE1);
        *((uint32_t *) PAGE1) = 0;
        
        v0 = *((uint32_t *) PAGE0);
        v1 = *((uint32_t *) PAGE1);
        
        TPRINTF("Value at virtual address %p is %#" PRIx32 ".\n",
            (void *) PAGE0, *((uint32_t *) PAGE0));
        TPRINTF("Value at virtual address %p is %#" PRIx32 ".\n",
            (void *) PAGE1, *((uint32_t *) PAGE1));
        
        if (v0 != 0)
                return "Value at v0 not equal to 0";
        if (v1 != 0)
                return "Value at v1 not equal to 0";
        
        return NULL;
}