| 1 | /*
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| 2 | * Copyright (C) 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/asm.h>
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| 40 | #include <arch/types.h>
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| 41 | #include <typedefs.h>
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| 42 | #include <memstr.h>
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| 43 | #include <bitops.h>
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| 44 |
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| 45 | __u32 vesa_ph_addr;
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| 46 | __u16 vesa_width;
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| 47 | __u16 vesa_height;
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| 48 | __u16 vesa_bpp;
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| 49 | __u16 vesa_scanline;
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| 50 |
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| 51 | int vesa_present(void)
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| 52 | {
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| 53 | if (vesa_width != 0xffff)
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| 54 | return true;
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| 55 | if (vesa_height != 0xffff)
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| 56 | return true;
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| 57 | return false;
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| 58 | }
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| 59 |
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| 60 | static count_t vesa_frame_order(void)
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| 61 | {
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| 62 | __u32 x = vesa_scanline*vesa_height;
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| 63 | if (x <= FRAME_SIZE)
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| 64 | return 0;
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| 65 |
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| 66 | return (fnzb32(x - 1) + 1) - FRAME_WIDTH;
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| 67 | }
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| 68 |
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| 69 | void vesa_init(void)
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| 70 | {
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| 71 | int a;
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| 72 | __address vram_lin_addr;
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| 73 |
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| 74 | vram_lin_addr = PA2KA(PFN2ADDR(frame_alloc(vesa_frame_order(), 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, vram_lin_addr + a*PAGE_SIZE, vesa_ph_addr + a*FRAME_SIZE,
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| 78 | PAGE_NOT_CACHEABLE);
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| 79 |
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| 80 | fb_init(vram_lin_addr, vesa_width, vesa_height, vesa_bpp, vesa_scanline);
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| 81 | }
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| 82 |
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| 83 | #endif
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