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1287 vana 1
/*
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 * Copyright (C) 2006-2006 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/types.h>
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#include <arch/asm.h>
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#include <memstr.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) return true;
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    if(vesa_height!=0xffff) return true;
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    return false;
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}
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static __u32 log2(__u32 x)
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{
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    __u32 l=2;
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    if(x<=PAGE_SIZE) return PAGE_WIDTH+1;
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    x--;
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    while(x>>=1) l++;
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    return l;
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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 videoram_lin_addr;
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    videoram_lin_addr=PA2KA(PFN2ADDR(frame_alloc( log2(vesa_scanline*vesa_height) -FRAME_WIDTH,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, videoram_lin_addr+a*4096, vesa_ph_addr+a*4096, PAGE_NOT_CACHEABLE);
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    fb_init( videoram_lin_addr,vesa_width,vesa_height,vesa_bpp,vesa_scanline);
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}
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#endif
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