| 1 | /*
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| 2 | * Copyright (C) 2006-2006 Jakub Vana
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifdef CONFIG_FB
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| 30 |
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| 31 | #include <genarch/fb/fb.h>
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| 32 | #include <arch/vesa.h>
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| 33 | #include <putchar.h>
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| 34 | #include <mm/page.h>
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| 35 | #include <mm/frame.h>
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| 36 | #include <mm/as.h>
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| 37 | #include <arch/mm/page.h>
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| 38 | #include <synch/spinlock.h>
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| 39 | #include <arch/types.h>
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| 40 | #include <arch/asm.h>
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| 41 | #include <memstr.h>
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| 42 |
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| 43 | __u32 vesa_ph_addr;
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| 44 | __u16 vesa_width;
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| 45 | __u16 vesa_height;
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| 46 | __u16 vesa_bpp;
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| 47 | __u16 vesa_scanline;
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| 48 |
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| 49 |
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| 50 | int vesa_present(void)
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| 51 | {
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| 52 | if(vesa_width!=0xffff) return true;
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| 53 | if(vesa_height!=0xffff) return true;
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| 54 | return false;
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| 55 | }
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| 56 |
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| 57 |
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| 58 | static __u32 log2(__u32 x)
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| 59 | {
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| 60 | __u32 l=2;
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| 61 | if(x<=PAGE_SIZE) return PAGE_WIDTH+1;
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| 62 |
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| 63 | x--;
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| 64 | while(x>>=1) l++;
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| 65 | return l;
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| 66 | }
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| 67 |
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| 68 | void vesa_init(void)
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| 69 | {
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| 70 | int a;
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| 71 |
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| 72 | __address videoram_lin_addr;
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| 73 |
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| 74 | videoram_lin_addr=PA2KA(PFN2ADDR(frame_alloc( log2(vesa_scanline*vesa_height) -FRAME_WIDTH,FRAME_KA)));
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| 75 | /* Map videoram */
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| 76 | for(a=0;a<((vesa_scanline*vesa_height+PAGE_SIZE-1)>>PAGE_WIDTH);a++)
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| 77 | page_mapping_insert(AS_KERNEL, videoram_lin_addr+a*4096, vesa_ph_addr+a*4096, PAGE_NOT_CACHEABLE);
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| 78 |
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| 79 | fb_init( videoram_lin_addr,vesa_width,vesa_height,vesa_bpp,vesa_scanline);
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| 80 | putchar('\n');
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| 81 | }
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| 82 |
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| 83 | #endif
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| 84 |
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