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/*
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 * Copyright (C) 2006 Jakub Vana
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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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#ifdef CONFIG_FB
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#include <genarch/fb/fb.h>
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#include <arch/vesa.h>
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#include <putchar.h>
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#include <mm/page.h>
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#include <mm/frame.h>
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#include <mm/as.h>
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#include <arch/mm/page.h>
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#include <synch/spinlock.h>
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#include <arch/asm.h>
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#include <arch/types.h>
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#include <typedefs.h>
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#include <memstr.h>
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#include <bitops.h>
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__u32 vesa_ph_addr;
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__u16 vesa_width;
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__u16 vesa_height;
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__u16 vesa_bpp;
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__u16 vesa_scanline;
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int vesa_present(void)
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{
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    if (vesa_width != 0xffff)
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        return true;
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    if (vesa_height != 0xffff)
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        return true;
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    return false;
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}
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static count_t vesa_frame_order(void)
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{
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    __u32 x = vesa_scanline*vesa_height;
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    if (x <= FRAME_SIZE)
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        return 1;
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    return (fnzb32(x - 1) + 1) - FRAME_WIDTH;
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}
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void vesa_init(void)
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{
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    int a;
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    __address vram_lin_addr;
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    vram_lin_addr = PA2KA(PFN2ADDR(frame_alloc(vesa_frame_order(), FRAME_KA)));
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    /* Map videoram */
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    for (a = 0; a < ((vesa_scanline * vesa_height + PAGE_SIZE - 1) >> PAGE_WIDTH); a++)
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        page_mapping_insert(AS_KERNEL, vram_lin_addr+a*4096, vesa_ph_addr+a*4096, PAGE_NOT_CACHEABLE);
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    fb_init(vram_lin_addr, vesa_width, vesa_height, vesa_bpp, vesa_scanline);
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}
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#endif