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/* |
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* Copyright (C) 2004-2005 Anders Gavare. 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 are met: |
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* |
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* 1. 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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* 2. 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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* 3. 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 AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: dev_vga.c,v 1.35 2005/03/05 12:31:26 debug Exp $ |
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* |
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* VGA text console device. |
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* |
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* A few ugly hacks are used. The default resolution is 640x480, which |
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* means that the following font sizes and text resolutions can be used: |
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* |
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* 8x16 80 x 30 |
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* 8x10 (with the last line repeated twice) 80 x 43 |
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* 8x8 80 x 60 |
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* |
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* There is only a mode switch when actual non-space text is written outside |
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* the current window. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "cpu.h" |
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#include "devices.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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|
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/* These are generated from binary font files: */ |
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#include "fonts/font8x8.c" |
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#include "fonts/font8x10.c" |
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#include "fonts/font8x16.c" |
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|
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|
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/* For bintranslated videomem -> framebuffer updates: */ |
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#define VGA_TICK_SHIFT 14 |
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|
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#define VGA_MEM_MAXY 60 |
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#define VGA_MEM_ALLOCY 67 |
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|
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|
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#define VGA_FB_ADDR 0x1230000000ULL |
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|
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struct vga_data { |
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uint64_t videomem_base; |
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uint64_t control_base; |
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|
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struct vfb_data *fb; |
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|
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int font_size; |
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unsigned char *font; |
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|
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int max_x; |
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int max_y; |
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size_t videomem_size; |
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unsigned char *videomem; /* 2 bytes per char */ |
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|
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unsigned char selected_register; |
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unsigned char reg[256]; |
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|
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int palette_index; |
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int palette_subindex; |
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|
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int cursor_x; |
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int cursor_y; |
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|
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int modified; |
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int update_x1; |
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int update_y1; |
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int update_x2; |
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int update_y2; |
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}; |
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|
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|
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/* |
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* vga_update(): |
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* |
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* This function should be called whenever any part of d->videomem[] has |
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* been written to. It will redraw all characters within the range x1,y1 |
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* .. x2,y2 using the right palette. |
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*/ |
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static void vga_update(struct machine *machine, struct vga_data *d, |
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int x1, int y1, int x2, int y2) |
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{ |
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int fg, bg, i, x,y, subx, line, start, end; |
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|
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/* Hm... I'm still using the old start..end code: */ |
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start = (d->max_x * y1 + x1) * 2; |
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end = (d->max_x * y2 + x2) * 2; |
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|
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start &= ~1; |
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end |= 1; |
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|
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if (end >= d->videomem_size) |
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end = d->videomem_size - 1; |
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|
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for (i=start; i<=end; i+=2) { |
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unsigned char ch = d->videomem[i]; |
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fg = d->videomem[i+1] & 15; |
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bg = (d->videomem[i+1] >> 4) & 7; |
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|
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/* Blink is hard to do :-), but inversion might be ok too: */ |
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if (d->videomem[i+1] & 128) { |
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int tmp = fg; fg = bg; bg = tmp; |
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} |
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|
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x = (i/2) % d->max_x; x *= 8; |
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y = (i/2) / d->max_x; y *= d->font_size; |
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|
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for (line = 0; line < d->font_size; line++) { |
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for (subx = 0; subx < 8; subx++) { |
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unsigned char pixel[3]; |
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int addr, line2readfrom = line; |
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int actualfontheight = d->font_size; |
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|
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if (d->font_size == 11) { |
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actualfontheight = 10; |
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if (line == 10) |
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line2readfrom = 9; |
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} |
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|
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addr = (d->max_x*8 * (line+y) + x + subx) |
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* 3; |
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|
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pixel[0] = d->fb->rgb_palette[bg * 3 + 0]; |
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pixel[1] = d->fb->rgb_palette[bg * 3 + 1]; |
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pixel[2] = d->fb->rgb_palette[bg * 3 + 2]; |
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|
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if (d->font[ch * actualfontheight + |
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line2readfrom] & (128 >> subx)) { |
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pixel[0] = d->fb->rgb_palette |
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[fg * 3 + 0]; |
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pixel[1] = d->fb->rgb_palette |
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[fg * 3 + 1]; |
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pixel[2] = d->fb->rgb_palette |
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[fg * 3 + 2]; |
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} |
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|
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/* TODO: don't hardcode */ |
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if (addr < 640 * 480 *3) |
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dev_fb_access(machine->cpus[0], |
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machine->memory, addr, &pixel[0], |
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sizeof(pixel), MEM_WRITE, d->fb); |
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} |
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} |
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} |
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} |
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|
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|
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/* |
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* vga_update_cursor(): |
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*/ |
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static void vga_update_cursor(struct vga_data *d) |
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{ |
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/* TODO: Don't hardcode the cursor size. */ |
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dev_fb_setcursor(d->fb, |
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d->cursor_x * 8, d->cursor_y * d->font_size + |
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d->font_size - 4, 1, 8, 3); |
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} |
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|
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|
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/* |
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* dev_vga_tick(): |
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*/ |
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void dev_vga_tick(struct cpu *cpu, void *extra) |
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{ |
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struct vga_data *d = extra; |
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uint64_t low = (uint64_t)-1, high; |
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|
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memory_device_bintrans_access(cpu, cpu->mem, extra, &low, &high); |
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|
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if ((int64_t)low != -1) { |
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debug("[ dev_vga_tick: bintrans access, %llx .. %llx ]\n", |
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(long long)low, (long long)high); |
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d->update_x1 = 0; |
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d->update_x2 = d->max_x - 1; |
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d->update_y1 = (low/2) / d->max_x; |
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d->update_y2 = ((high/2) / d->max_x) + 1; |
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if (d->update_y2 >= d->max_y) |
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d->update_y2 = d->max_y - 1; |
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d->modified = 1; |
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} |
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|
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if (d->modified) { |
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vga_update(cpu->machine, d, |
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d->update_x1, d->update_y1, d->update_x2, d->update_y2); |
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|
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d->modified = 0; |
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d->update_x1 = 999999; |
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d->update_x2 = -1; |
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d->update_y1 = 999999; |
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d->update_y2 = -1; |
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} |
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} |
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|
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|
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/* |
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* dev_vga_access(): |
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* |
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* Reads and writes to the VGA video memory. |
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*/ |
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int dev_vga_access(struct cpu *cpu, struct memory *mem, uint64_t relative_addr, |
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unsigned char *data, size_t len, int writeflag, void *extra) |
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{ |
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struct vga_data *d = extra; |
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uint64_t idata = 0, odata = 0; |
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int i, x, y, x2, y2; |
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|
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idata = memory_readmax64(cpu, data, len); |
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|
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y = relative_addr / (d->max_x * 2); |
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x = (relative_addr/2) % d->max_x; |
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|
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y2 = (relative_addr+len-1) / (d->max_x * 2); |
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x2 = ((relative_addr+len-1)/2) % d->max_x; |
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|
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/* |
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* Switch fonts? This is an ugly hack which only switches when |
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* parts of the video ram is accessed that are outside the current |
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* screen. (Specially "crafted" :-) to work with Windows NT.) |
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*/ |
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if (writeflag && (idata & 255) != 0x20 && (relative_addr & 1) == 0) { |
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if (y >= 43 && d->font_size > 8) { |
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/* Switch to 8x8 font: */ |
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debug("SWITCHING to 8x8 font\n"); |
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d->font_size = 8; |
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d->font = font8x8; |
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d->max_y = VGA_MEM_MAXY; |
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vga_update(cpu->machine, d, 0, 0, |
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d->max_x - 1, d->max_y - 1); |
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vga_update_cursor(d); |
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} else if (y >= 30 && d->font_size > 11) { |
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/* Switch to 8x10 font: */ |
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debug("SWITCHING to 8x10 font\n"); |
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d->font_size = 11; /* NOTE! 11 */ |
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d->font = font8x10; |
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vga_update(cpu->machine, d, 0, 0, |
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d->max_x - 1, d->max_y - 1); |
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d->max_y = 43; |
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vga_update_cursor(d); |
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} |
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} |
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|
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if (relative_addr < d->videomem_size) { |
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if (writeflag == MEM_WRITE) { |
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for (i=0; i<len; i++) { |
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int old = d->videomem[relative_addr + i]; |
| 272 |
if (old != data[i]) { |
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d->videomem[relative_addr + i] = |
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data[i]; |
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d->modified = 1; |
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} |
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} |
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|
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if (d->modified) { |
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if (x < d->update_x1) d->update_x1 = x; |
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if (x > d->update_x2) d->update_x2 = x; |
| 282 |
if (y < d->update_y1) d->update_y1 = y; |
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if (y > d->update_y2) d->update_y2 = y; |
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|
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if (x2 < d->update_x1) d->update_x1 = x2; |
| 286 |
if (x2 > d->update_x2) d->update_x2 = x2; |
| 287 |
if (y2 < d->update_y1) d->update_y1 = y2; |
| 288 |
if (y2 > d->update_y2) d->update_y2 = y2; |
| 289 |
} |
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} else |
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memcpy(data, d->videomem + relative_addr, len); |
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return 1; |
| 293 |
} |
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|
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switch (relative_addr) { |
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default: |
| 297 |
if (writeflag==MEM_READ) { |
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debug("[ vga: read from 0x%08lx ]\n", |
| 299 |
(long)relative_addr); |
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} else { |
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debug("[ vga: write to 0x%08lx: 0x%08x ]\n", |
| 302 |
(long)relative_addr, idata); |
| 303 |
} |
| 304 |
} |
| 305 |
|
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if (writeflag == MEM_READ) |
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memory_writemax64(cpu, data, len, odata); |
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|
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return 1; |
| 310 |
} |
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|
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|
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/* |
| 314 |
* vga_reg_write(): |
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* |
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* Writes to VGA control registers. |
| 317 |
*/ |
| 318 |
static void vga_reg_write(struct vga_data *d, int regnr, int idata) |
| 319 |
{ |
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int ofs; |
| 321 |
|
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switch (regnr) { |
| 323 |
case 0x0e: |
| 324 |
case 0x0f: |
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ofs = d->reg[0x0e] * 256 + d->reg[0x0f]; |
| 326 |
d->cursor_x = ofs % d->max_x; |
| 327 |
d->cursor_y = ofs / d->max_x; |
| 328 |
vga_update_cursor(d); |
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break; |
| 330 |
default: |
| 331 |
debug("[ vga_reg_write: regnr=0x%02x idata=0x%02x ]\n", |
| 332 |
regnr, idata); |
| 333 |
} |
| 334 |
} |
| 335 |
|
| 336 |
|
| 337 |
/* |
| 338 |
* dev_vga_ctrl_access(): |
| 339 |
* |
| 340 |
* Reads and writes of the VGA control registers. |
| 341 |
*/ |
| 342 |
int dev_vga_ctrl_access(struct cpu *cpu, struct memory *mem, |
| 343 |
uint64_t relative_addr, unsigned char *data, size_t len, |
| 344 |
int writeflag, void *extra) |
| 345 |
{ |
| 346 |
struct vga_data *d = extra; |
| 347 |
uint64_t idata = 0, odata = 0; |
| 348 |
|
| 349 |
idata = memory_readmax64(cpu, data, len); |
| 350 |
|
| 351 |
switch (relative_addr) { |
| 352 |
case 0x01: /* "Other video attributes" */ |
| 353 |
odata = 0xff; /* ? */ |
| 354 |
break; |
| 355 |
case 0x08: |
| 356 |
if (writeflag == MEM_WRITE) { |
| 357 |
d->palette_index = idata; |
| 358 |
d->palette_subindex = 0; |
| 359 |
} else { |
| 360 |
odata = d->palette_index; |
| 361 |
} |
| 362 |
break; |
| 363 |
case 0x09: |
| 364 |
if (writeflag == MEM_WRITE) { |
| 365 |
int new = (idata & 63) << 2; |
| 366 |
int old = d->fb->rgb_palette[d->palette_index * 3 + |
| 367 |
d->palette_subindex]; |
| 368 |
d->fb->rgb_palette[d->palette_index * 3 + |
| 369 |
d->palette_subindex] = new; |
| 370 |
/* Redraw whole screen, if the palette changed: */ |
| 371 |
if (new != old) { |
| 372 |
d->modified = 1; |
| 373 |
d->update_x1 = d->update_y1 = 0; |
| 374 |
d->update_x2 = d->max_x - 1; |
| 375 |
d->update_y2 = d->max_y - 1; |
| 376 |
} |
| 377 |
} else { |
| 378 |
odata = (d->fb->rgb_palette[d->palette_index * 3 + |
| 379 |
d->palette_subindex] >> 2) & 63; |
| 380 |
} |
| 381 |
d->palette_subindex ++; |
| 382 |
if (d->palette_subindex == 3) { |
| 383 |
d->palette_index ++; |
| 384 |
d->palette_subindex = 0; |
| 385 |
} |
| 386 |
d->palette_index &= 255; |
| 387 |
break; |
| 388 |
case 0x0c: /* VGA graphics 1 position */ |
| 389 |
odata = 1; /* ? */ |
| 390 |
break; |
| 391 |
case 0x14: /* register select */ |
| 392 |
if (writeflag == MEM_READ) |
| 393 |
odata = d->selected_register; |
| 394 |
else |
| 395 |
d->selected_register = idata; |
| 396 |
break; |
| 397 |
case 0x15: if (writeflag == MEM_READ) |
| 398 |
odata = d->reg[d->selected_register]; |
| 399 |
else { |
| 400 |
d->reg[d->selected_register] = idata; |
| 401 |
vga_reg_write(d, d->selected_register, idata); |
| 402 |
} |
| 403 |
break; |
| 404 |
case 0x1a: /* Status register */ |
| 405 |
odata = 1; /* Display enabled */ |
| 406 |
/* odata |= 16; */ /* Vertical retrace */ |
| 407 |
break; |
| 408 |
default: |
| 409 |
if (writeflag==MEM_READ) { |
| 410 |
fatal("[ vga_ctrl: read from 0x%08lx ]\n", |
| 411 |
(long)relative_addr); |
| 412 |
} else { |
| 413 |
static int warning = 0; |
| 414 |
warning ++; |
| 415 |
if (warning > 2) |
| 416 |
break; |
| 417 |
if (warning > 1) { |
| 418 |
fatal("[ vga_ctrl: multiple unimplemented wr" |
| 419 |
"ites, ignoring warnings from now on ]\n"); |
| 420 |
break; |
| 421 |
} |
| 422 |
fatal("[ vga_ctrl: write to 0x%08lx: 0x%08x ]\n", |
| 423 |
(long)relative_addr, idata); |
| 424 |
} |
| 425 |
} |
| 426 |
|
| 427 |
if (writeflag == MEM_READ) |
| 428 |
memory_writemax64(cpu, data, len, odata); |
| 429 |
|
| 430 |
return 1; |
| 431 |
} |
| 432 |
|
| 433 |
|
| 434 |
/* |
| 435 |
* dev_vga_init(): |
| 436 |
* |
| 437 |
* Register a VGA text console device. max_x and max_y could be something |
| 438 |
* like 80 and 25, respectively. |
| 439 |
*/ |
| 440 |
void dev_vga_init(struct machine *machine, struct memory *mem, |
| 441 |
uint64_t videomem_base, uint64_t control_base, int max_x, int max_y, |
| 442 |
char *name) |
| 443 |
{ |
| 444 |
struct vga_data *d; |
| 445 |
int r,g,b,i, x,y; |
| 446 |
size_t allocsize; |
| 447 |
|
| 448 |
d = malloc(sizeof(struct vga_data)); |
| 449 |
if (d == NULL) { |
| 450 |
fprintf(stderr, "out of memory\n"); |
| 451 |
exit(1); |
| 452 |
} |
| 453 |
memset(d, 0, sizeof(struct vga_data)); |
| 454 |
d->videomem_base = videomem_base; |
| 455 |
d->control_base = control_base; |
| 456 |
d->max_x = max_x; |
| 457 |
d->max_y = max_y; |
| 458 |
d->videomem_size = max_x * VGA_MEM_MAXY * 2; |
| 459 |
|
| 460 |
/* Allocate in 4KB pages, to make it possible to use bintrans: */ |
| 461 |
allocsize = ((d->videomem_size - 1) | 0xfff) + 1; |
| 462 |
d->videomem = malloc(d->videomem_size); |
| 463 |
if (d->videomem == NULL) { |
| 464 |
fprintf(stderr, "out of memory in dev_vga_init()\n"); |
| 465 |
exit(1); |
| 466 |
} |
| 467 |
|
| 468 |
for (y=0; y<VGA_MEM_MAXY; y++) { |
| 469 |
char s[81]; |
| 470 |
#ifdef VERSION |
| 471 |
strcpy(s, " GXemul-" VERSION); |
| 472 |
#else |
| 473 |
strcpy(s, " GXemul"); |
| 474 |
#endif |
| 475 |
memset(s+strlen(s), ' ', 80 - strlen(s)); |
| 476 |
memcpy(s+79-strlen(name), name, strlen(name)); |
| 477 |
s[80] = 0; |
| 478 |
|
| 479 |
for (x=0; x<max_x; x++) { |
| 480 |
char ch = ' '; |
| 481 |
if (y == 0) |
| 482 |
ch = s[x]; |
| 483 |
i = (x + max_x * y) * 2; |
| 484 |
d->videomem[i] = ch; |
| 485 |
|
| 486 |
/* Default color: */ |
| 487 |
d->videomem[i+1] = y==0? 0x70 : 0x07; |
| 488 |
} |
| 489 |
} |
| 490 |
|
| 491 |
d->font_size = 16; |
| 492 |
d->font = font8x16; |
| 493 |
|
| 494 |
d->fb = dev_fb_init(machine, mem, VGA_FB_ADDR, VFB_GENERIC, |
| 495 |
8*max_x, 16*max_y, 8*max_x, 16*max_y, 24, "VGA", 0); |
| 496 |
|
| 497 |
i = 0; |
| 498 |
for (r=0; r<2; r++) |
| 499 |
for (g=0; g<2; g++) |
| 500 |
for (b=0; b<2; b++) { |
| 501 |
d->fb->rgb_palette[i + 0] = r * 0xaa; |
| 502 |
d->fb->rgb_palette[i + 1] = g * 0xaa; |
| 503 |
d->fb->rgb_palette[i + 2] = b * 0xaa; |
| 504 |
i+=3; |
| 505 |
} |
| 506 |
for (r=0; r<2; r++) |
| 507 |
for (g=0; g<2; g++) |
| 508 |
for (b=0; b<2; b++) { |
| 509 |
d->fb->rgb_palette[i + 0] = r * 0xaa + 0x55; |
| 510 |
d->fb->rgb_palette[i + 1] = g * 0xaa + 0x55; |
| 511 |
d->fb->rgb_palette[i + 2] = b * 0xaa + 0x55; |
| 512 |
i+=3; |
| 513 |
} |
| 514 |
|
| 515 |
memory_device_register(mem, "vga_mem", videomem_base, allocsize, |
| 516 |
dev_vga_access, d, MEM_BINTRANS_OK |
| 517 |
/* | MEM_BINTRANS_WRITE_OK <-- This works with OpenBSD/arc, but not |
| 518 |
with Windows NT yet. Why? */ |
| 519 |
, |
| 520 |
d->videomem); |
| 521 |
memory_device_register(mem, "vga_ctrl", control_base, |
| 522 |
32, dev_vga_ctrl_access, d, MEM_DEFAULT, NULL); |
| 523 |
|
| 524 |
/* Make sure that the first line is in synch. */ |
| 525 |
vga_update(machine, d, 0, 0, d->max_x - 1, 0); |
| 526 |
|
| 527 |
d->update_x1 = 999999; |
| 528 |
d->update_x2 = -1; |
| 529 |
d->update_y1 = 999999; |
| 530 |
d->update_y2 = -1; |
| 531 |
d->modified = 0; |
| 532 |
|
| 533 |
machine_add_tickfunction(machine, dev_vga_tick, d, VGA_TICK_SHIFT); |
| 534 |
} |
| 535 |
|
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