/* Realtek RTL8169 Family Driver
 * Copyright (C) 2004 Marcus Overhagen <marcus@overhagen.de>. All rights reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation for any purpose and without fee is hereby granted, provided
 * that the above copyright notice appear in all copies, and that both the
 * copyright notice and this permission notice appear in supporting documentation.
 *
 * Marcus Overhagen makes no representations about the suitability of this software
 * for any purpose. It is provided "as is" without express or implied warranty.
 *
 * MARCUS OVERHAGEN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL MARCUS
 * OVERHAGEN BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
 * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include <Errors.h>
#include <OS.h>
#include <string.h>

//#define DEBUG

#include "fwdebug.h"
#include "util.h"


static inline uint32
round_to_pagesize(uint32 size)
{
        return (size + B_PAGE_SIZE - 1) & ~(B_PAGE_SIZE - 1);
}


area_id
alloc_mem(void **virt, void **phy, size_t size, uint32 protection,
        const char *name)
{
// TODO: phy should be phys_addr_t*!
        physical_entry pe;
        void *virtadr;
        area_id area;
        status_t rv;

        TRACE("allocating %ld bytes for %s\n", size, name);

        size = round_to_pagesize(size);
        area = create_area(name, &virtadr, B_ANY_KERNEL_ADDRESS, size,
                B_32_BIT_CONTIGUOUS, protection);
                // TODO: The rest of the code doesn't deal correctly with physical
                // addresses > 4 GB, so we have to force 32 bit addresses here.
        if (area < B_OK) {
                ERROR("couldn't allocate area %s\n", name);
                return B_ERROR;
        }
        rv = get_memory_map(virtadr, size, &pe, 1);
        if (rv < B_OK) {
                delete_area(area);
                ERROR("couldn't get mapping for %s\n", name);
                return B_ERROR;
        }
        memset(virtadr, 0, size);
        if (virt)
                *virt = virtadr;
        if (phy)
                *phy = (void*)(addr_t)pe.address;
        TRACE("area = %" B_PRId32 ", size = %ld, virt = %p, phy = %" B_PRIxPHYSADDR "\n", area, size, virtadr,
                pe.address);
        return area;
}


area_id
map_mem(void **virt, void *phy, size_t size, uint32 protection,
        const char *name)
{
        uint32 offset;
        void *phyadr;
        void *mapadr;
        area_id area;

        TRACE("mapping physical address %p with %ld bytes for %s\n", phy, size,
                name);

        offset = (intptr_t)phy & (B_PAGE_SIZE - 1);
        phyadr = (char *)phy - offset;
        size = round_to_pagesize(size + offset);
        area = map_physical_memory(name, (addr_t)phyadr, size,
                B_ANY_KERNEL_BLOCK_ADDRESS, protection, &mapadr);
        if (area < B_OK) {
                ERROR("mapping '%s' failed, error 0x%" B_PRIx32 " (%s)\n", name, area,
                        strerror(area));
                return area;
        }

        *virt = (char *)mapadr + offset;

        TRACE("physical = %p, virtual = %p, offset = %" B_PRId32 ", phyadr = %p, "
                "mapadr = %p, size = %ld, area = 0x%08" B_PRIx32 "\n", phy, *virt,
                offset, phyadr, mapadr, size, area);

        return area;
}