source: mainline/kernel/arch/ia64/src/mm/frame.c@ 0fd9b35

/*
 * 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 ia64mm
 * @{
 */
/** @file
 */

#include <arch/mm/frame.h>
#include <mm/frame.h>
#include <config.h>
#include <panic.h>
#include <arch/bootinfo.h>
#include <align.h>
#include <macros.h>

#define KERNEL_RESERVED_AREA_BASE       (0x4400000)
#define KERNEL_RESERVED_AREA_SIZE       (16 * 1024 * 1024)

#define ROM_BASE        0xa0000               /* for simulators */
#define ROM_SIZE        (384 * 1024)          /* for simulators */

#define MIN_ZONE_SIZE   (64 * 1024)

#define MINCONF 1

uintptr_t end_of_identity = -1ULL;

static void frame_common_arch_init(bool low)
{
        unsigned int i;

        for (i = 0; i < bootinfo->memmap_items; i++) {
                if (bootinfo->memmap[i].type != MEMMAP_FREE_MEM)
                        continue;

                uintptr_t base = bootinfo->memmap[i].base;
                size_t size = bootinfo->memmap[i].size;
                uintptr_t abase = ALIGN_UP(base, FRAME_SIZE);

                if (size > FRAME_SIZE)
                        size -= abase - base;

                if (!frame_adjust_zone_bounds(low, &abase, &size))
                        continue;

                if (size > MIN_ZONE_SIZE) {
                        pfn_t pfn = ADDR2PFN(abase);
                        size_t count = SIZE2FRAMES(size);

                        if (low) {
                                zone_create(pfn, count, max(MINCONF, pfn),
                                    ZONE_AVAILABLE | ZONE_LOWMEM);
                        } else {
                                pfn_t conf;

                                conf = zone_external_conf_alloc(count);
                                zone_create(pfn, count, conf,
                                    ZONE_AVAILABLE | ZONE_HIGHMEM);
                        }
                }
        }
}

void frame_low_arch_init(void)
{
        if (config.cpu_active > 1)
                return;
        
        frame_common_arch_init(true);
        
        /*
         * Blacklist ROM regions.
         */
        frame_mark_unavailable(ADDR2PFN(ROM_BASE),
            SIZE2FRAMES(ROM_SIZE));

        frame_mark_unavailable(ADDR2PFN(KERNEL_RESERVED_AREA_BASE),
            SIZE2FRAMES(KERNEL_RESERVED_AREA_SIZE));

        /* PA2KA will work only on low-memory. */
        end_of_identity = PA2KA(config.physmem_end - FRAME_SIZE) + PAGE_SIZE;
}

void frame_high_arch_init(void)
{
        if (config.cpu_active > 1)
                return;
        
        frame_common_arch_init(false);
}

/** @}
 */