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332 palkovsky 1
/*
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 * Copyright (C) 2005 Ondrej Palkovsky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <arch/drivers/arc.h>
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#include <arch/mm/page.h>
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#include <print.h>
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#include <arch.h>
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#include <arch/byteorder.h>
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/* This is a good joke, SGI HAS different types than NT bioses... */
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/* Here is the SGI type */
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static char *basetypes[] = {
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    "ExceptionBlock",
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    "SystemParameterBlock",
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    "FreeContiguous",
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    "FreeMemory",
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    "BadMemory",
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    "LoadedProgram",
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    "FirmwareTemporary",
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    "FirmwarePermanent"
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};
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static arc_sbp *sbp = (arc_sbp *)PA2KA(0x1000);
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static arc_func_vector_t *arc_entry;
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static void _arc_putchar(char ch);
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/** Initialize ARC structure
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 *
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 * @return 0 - ARC OK, -1 - ARC does not exist
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 */
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int init_arc(void)
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{
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    if (sbp->signature != ARC_MAGIC) {
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        sbp = NULL;
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        return -1;
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    }
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    arc_entry = sbp->firmwarevector;
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    arc_putchar('A');
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    arc_putchar('R');
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    arc_putchar('C');
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    arc_putchar('\n');
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}
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/** Return true if ARC is available */
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int arc_enabled(void)
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{
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    return sbp != NULL;
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}
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void arc_print_memory_map(void)
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{
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    arc_memdescriptor_t *desc;
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    if (!sbp) {
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        printf("ARC not enabled.\n");
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        return;
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    }
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    printf("Memory map:\n");
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    desc = arc_entry->getmemorydescriptor(NULL);
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    while (desc) {
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        printf("%s: %d (size: %dKB)\n",basetypes[desc->type],
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               desc->basepage * 4096,
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               desc->basecount*4);
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        desc = arc_entry->getmemorydescriptor(desc);
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    }
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}
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/** Print charactor to console */
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void arc_putchar(char ch)
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{
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    __u32 cnt;
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    pri_t pri;
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    /* TODO: Should be spinlock? */
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    pri = cpu_priority_high();
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    arc_entry->write(1, &ch, 1, &cnt);
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    cpu_priority_restore(pri);
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}