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/*

 * Copyright (c) 2007 Pavel Jancik, Michal Kebrt

 * 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 arm32mm

 * @{

 */

/** @file

 */

#include <arch/mm/page.h>

#include <genarch/mm/page_pt.h>

#include <mm/page.h>

#include <align.h>

#include <config.h>

#include <arch/exception.h>

#include <typedefs.h>

#include <arch/types.h>

#include <interrupt.h>

#include <arch/debug_print/print.h>

/**

 * Initializes kernel adress space page tables, sets abourts exceptions vectors

 */

void page_arch_init(void)

{

    uintptr_t cur;

    int flags;

    page_mapping_operations = &pt_mapping_operations;

    flags = PAGE_CACHEABLE;

    /* PA2KA(identity) mapping for all frames until last_frame */

    for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {

        page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);

    }

    // Create mapping for exception table at high offcet

    #ifdef HIGH_EXCEPTION_VECTORS

    /* Note: this mapping cann't be done by hw_map because fixed exception

       vector is stored at fixed virtual address

     */

    // reserve frame for exception table

    void* virtaddr = frame_alloc( ONE_FRAME ,FRAME_KA);

    page_mapping_insert(AS_KERNEL, EXC_BASE_ADDRESS, KA2PA(virtaddr), flags );

    #endif

    // TODO: move to the kernel space

//  page_mapping_insert(AS_KERNEL, 0xffff0000, 0x00000000, flags);

    // TODO: remove when aux_printf not needed

//  page_mapping_insert(AS_KERNEL, 0x0000000, 0x0000000, flags);

    page_mapping_insert(AS_KERNEL, 0x1000000, 0x1000000, flags);

//  page_mapping_insert(AS_KERNEL, 0x1100000, 0x1100000, flags);

//  page_mapping_insert(AS_KERNEL, 0x1500000, 0x1500000, flags);

//  page_mapping_insert(AS_KERNEL, 0x1600000, 0x1600000, flags);

//  page_mapping_insert(AS_KERNEL, 0xffff0000, 0xffff0000, flags);

    as_switch(NULL, AS_KERNEL);

}

/**

 * Map device into kernel space.

 *

 * This function adds mapping of physical address that is read/write only

 *  from kernel and not bufferable.

 *

 * \param physaddr Physical addres where device is connected

 * \param size Length of area where device is present

 * \return Virtual address where device will be accessable

 * Note: This is copy of IA32 hw_map code

 */

uintptr_t hw_map(uintptr_t physaddr, size_t size)

{

    if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))

        panic("Unable to map physical memory %p (%d bytes)", physaddr, size)

    uintptr_t virtaddr = PA2KA(last_frame);

    pfn_t i;

    for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)

        page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE | PAGE_READ | PAGE_WRITE | PAGE_KERNEL);

    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);

    return virtaddr;

}

/** @}

 */