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/*
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/*
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 * Copyright (C) 2006-2006 Jakub Vana
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 * Copyright (C) 2006 Jakub Vana
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 * All rights reserved.
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 * All rights reserved.
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 *
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 *
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 * Redistribution and use in source and binary forms, with or without
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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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 * modification, are permitted provided that the following conditions
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 * are met:
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 * are met:
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#include <mm/page.h>
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#include <mm/page.h>
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#include <mm/frame.h>
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#include <mm/frame.h>
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#include <mm/as.h>
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#include <mm/as.h>
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#include <arch/mm/page.h>
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#include <arch/mm/page.h>
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#include <synch/spinlock.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 <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 <memstr.h>
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#include <bitops.h>
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__u32 vesa_ph_addr;
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__u32 vesa_ph_addr;
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__u16 vesa_width;
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__u16 vesa_width;
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__u16 vesa_height;
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__u16 vesa_height;
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__u16 vesa_bpp;
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__u16 vesa_bpp;
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__u16 vesa_scanline;
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__u16 vesa_scanline;
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int vesa_present(void)
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int vesa_present(void)
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{
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{
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    if(vesa_width!=0xffff) return true;
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    if (vesa_width != 0xffff)
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        return true;
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    if(vesa_height!=0xffff) 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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    return false;
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}
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}
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static __u32 log2(__u32 x)
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static count_t vesa_frame_order(void)
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{
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{
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    __u32 l=2;
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    __u32 x = vesa_scanline*vesa_height;
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    if(x<=PAGE_SIZE) return PAGE_WIDTH+1;
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    if (x <= FRAME_SIZE)
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        return 1;
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    x--;
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    while(x>>=1) l++;
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    return (fnzb32(x - 1) + 1) - FRAME_WIDTH;
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    return l;
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}
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}
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void vesa_init(void)
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void vesa_init(void)
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{
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{
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    int a;
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    int a;
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    __address vram_lin_addr;
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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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    vram_lin_addr = PA2KA(PFN2ADDR(frame_alloc(vesa_frame_order(), FRAME_KA)));
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    /* Map videoram */
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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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    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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        page_mapping_insert(AS_KERNEL, vram_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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    fb_init(vram_lin_addr, vesa_width, vesa_height, vesa_bpp, vesa_scanline);
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}
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}
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#endif
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#endif
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