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freebsd-nq/usr.sbin/bhyve/vga.c
Gleb Smirnoff 42854d99e8 Fix unchecked array reference in the VGA device emulation code. 
Submitted by:   Ilja Van Sprundel <ivansprundel@ioactive.com>
Patch by:	tychon
Security:       SA-16:32
2016-10-25 17:13:58 +00:00

1332 lines
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/*-
* Copyright (c) 2015 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <assert.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <machine/vmm.h>
#include "bhyvegc.h"
#include "console.h"
#include "inout.h"
#include "mem.h"
#include "vga.h"
#define KB (1024UL)
#define MB (1024 * 1024UL)
struct vga_softc {
struct mem_range mr;
struct bhyvegc *gc;
int gc_width;
int gc_height;
struct bhyvegc_image *gc_image;
uint8_t *vga_ram;
/*
* General registers
*/
uint8_t vga_misc;
uint8_t vga_sts1;
/*
* Sequencer
*/
struct {
int seq_index;
uint8_t seq_reset;
uint8_t seq_clock_mode;
int seq_cm_dots;
uint8_t seq_map_mask;
uint8_t seq_cmap_sel;
int seq_cmap_pri_off;
int seq_cmap_sec_off;
uint8_t seq_mm;
} vga_seq;
/*
* CRT Controller
*/
struct {
int crtc_index;
uint8_t crtc_mode_ctrl;
uint8_t crtc_horiz_total;
uint8_t crtc_horiz_disp_end;
uint8_t crtc_start_horiz_blank;
uint8_t crtc_end_horiz_blank;
uint8_t crtc_start_horiz_retrace;
uint8_t crtc_end_horiz_retrace;
uint8_t crtc_vert_total;
uint8_t crtc_overflow;
uint8_t crtc_present_row_scan;
uint8_t crtc_max_scan_line;
uint8_t crtc_cursor_start;
uint8_t crtc_cursor_on;
uint8_t crtc_cursor_end;
uint8_t crtc_start_addr_high;
uint8_t crtc_start_addr_low;
uint16_t crtc_start_addr;
uint8_t crtc_cursor_loc_low;
uint8_t crtc_cursor_loc_high;
uint16_t crtc_cursor_loc;
uint8_t crtc_vert_retrace_start;
uint8_t crtc_vert_retrace_end;
uint8_t crtc_vert_disp_end;
uint8_t crtc_offset;
uint8_t crtc_underline_loc;
uint8_t crtc_start_vert_blank;
uint8_t crtc_end_vert_blank;
uint8_t crtc_line_compare;
} vga_crtc;
/*
* Graphics Controller
*/
struct {
int gc_index;
uint8_t gc_set_reset;
uint8_t gc_enb_set_reset;
uint8_t gc_color_compare;
uint8_t gc_rotate;
uint8_t gc_op;
uint8_t gc_read_map_sel;
uint8_t gc_mode;
bool gc_mode_c4; /* chain 4 */
bool gc_mode_oe; /* odd/even */
uint8_t gc_mode_rm; /* read mode */
uint8_t gc_mode_wm; /* write mode */
uint8_t gc_misc;
uint8_t gc_misc_gm; /* graphics mode */
uint8_t gc_misc_mm; /* memory map */
uint8_t gc_color_dont_care;
uint8_t gc_bit_mask;
uint8_t gc_latch0;
uint8_t gc_latch1;
uint8_t gc_latch2;
uint8_t gc_latch3;
} vga_gc;
/*
* Attribute Controller
*/
struct {
int atc_flipflop;
int atc_index;
uint8_t atc_palette[16];
uint8_t atc_mode;
uint8_t atc_overscan_color;
uint8_t atc_color_plane_enb;
uint8_t atc_horiz_pixel_panning;
uint8_t atc_color_select;
uint8_t atc_color_select_45;
uint8_t atc_color_select_67;
} vga_atc;
/*
* DAC
*/
struct {
uint8_t dac_state;
uint8_t dac_rd_index;
uint8_t dac_rd_subindex;
uint8_t dac_wr_index;
uint8_t dac_wr_subindex;
uint8_t dac_palette[3 * 256];
uint32_t dac_palette_rgb[256];
} vga_dac;
};
static bool
vga_in_reset(struct vga_softc *sc)
{
return (((sc->vga_seq.seq_clock_mode & SEQ_CM_SO) != 0) ||
((sc->vga_seq.seq_reset & SEQ_RESET_ASYNC) == 0) ||
((sc->vga_seq.seq_reset & SEQ_RESET_SYNC) == 0) ||
((sc->vga_crtc.crtc_mode_ctrl & CRTC_MC_TE) == 0));
}
static void
vga_check_size(struct bhyvegc *gc, struct vga_softc *sc)
{
int old_width, old_height;
if (vga_in_reset(sc))
return;
//old_width = sc->gc_width;
//old_height = sc->gc_height;
old_width = sc->gc_image->width;
old_height = sc->gc_image->height;
/*
* Horizontal Display End: For text modes this is the number
* of characters. For graphics modes this is the number of
* pixels per scanlines divided by the number of pixels per
* character clock.
*/
sc->gc_width = (sc->vga_crtc.crtc_horiz_disp_end + 1) *
sc->vga_seq.seq_cm_dots;
sc->gc_height = (sc->vga_crtc.crtc_vert_disp_end |
(((sc->vga_crtc.crtc_overflow & CRTC_OF_VDE8) >> CRTC_OF_VDE8_SHIFT) << 8) |
(((sc->vga_crtc.crtc_overflow & CRTC_OF_VDE9) >> CRTC_OF_VDE9_SHIFT) << 9)) + 1;
if (old_width != sc->gc_width || old_height != sc->gc_height)
bhyvegc_resize(gc, sc->gc_width, sc->gc_height);
}
static uint32_t
vga_get_pixel(struct vga_softc *sc, int x, int y)
{
int offset;
int bit;
uint8_t data;
uint8_t idx;
offset = (y * sc->gc_width / 8) + (x / 8);
bit = 7 - (x % 8);
data = (((sc->vga_ram[offset + 0 * 64*KB] >> bit) & 0x1) << 0) |
(((sc->vga_ram[offset + 1 * 64*KB] >> bit) & 0x1) << 1) |
(((sc->vga_ram[offset + 2 * 64*KB] >> bit) & 0x1) << 2) |
(((sc->vga_ram[offset + 3 * 64*KB] >> bit) & 0x1) << 3);
data &= sc->vga_atc.atc_color_plane_enb;
if (sc->vga_atc.atc_mode & ATC_MC_IPS) {
idx = sc->vga_atc.atc_palette[data] & 0x0f;
idx |= sc->vga_atc.atc_color_select_45;
} else {
idx = sc->vga_atc.atc_palette[data];
}
idx |= sc->vga_atc.atc_color_select_67;
return (sc->vga_dac.dac_palette_rgb[idx]);
}
static void
vga_render_graphics(struct vga_softc *sc)
{
int x, y;
for (y = 0; y < sc->gc_height; y++) {
for (x = 0; x < sc->gc_width; x++) {
int offset;
offset = y * sc->gc_width + x;
sc->gc_image->data[offset] = vga_get_pixel(sc, x, y);
}
}
}
static uint32_t
vga_get_text_pixel(struct vga_softc *sc, int x, int y)
{
int dots, offset, bit, font_offset;
uint8_t ch, attr, font;
uint8_t idx;
dots = sc->vga_seq.seq_cm_dots;
offset = 2 * sc->vga_crtc.crtc_start_addr;
offset += (y / 16 * sc->gc_width / dots) * 2 + (x / dots) * 2;
bit = 7 - (x % dots > 7 ? 7 : x % dots);
ch = sc->vga_ram[offset + 0 * 64*KB];
attr = sc->vga_ram[offset + 1 * 64*KB];
if (sc->vga_crtc.crtc_cursor_on &&
(offset == (sc->vga_crtc.crtc_cursor_loc * 2)) &&
((y % 16) >= (sc->vga_crtc.crtc_cursor_start & CRTC_CS_CS)) &&
((y % 16) <= (sc->vga_crtc.crtc_cursor_end & CRTC_CE_CE))) {
idx = sc->vga_atc.atc_palette[attr & 0xf];
return (sc->vga_dac.dac_palette_rgb[idx]);
}
if ((sc->vga_seq.seq_mm & SEQ_MM_EM) &&
sc->vga_seq.seq_cmap_pri_off != sc->vga_seq.seq_cmap_sec_off) {
if (attr & 0x8)
font_offset = sc->vga_seq.seq_cmap_pri_off +
(ch << 5) + y % 16;
else
font_offset = sc->vga_seq.seq_cmap_sec_off +
(ch << 5) + y % 16;
attr &= ~0x8;
} else {
font_offset = (ch << 5) + y % 16;
}
font = sc->vga_ram[font_offset + 2 * 64*KB];
if (font & (1 << bit))
idx = sc->vga_atc.atc_palette[attr & 0xf];
else
idx = sc->vga_atc.atc_palette[attr >> 4];
return (sc->vga_dac.dac_palette_rgb[idx]);
}
static void
vga_render_text(struct vga_softc *sc)
{
int x, y;
for (y = 0; y < sc->gc_height; y++) {
for (x = 0; x < sc->gc_width; x++) {
int offset;
offset = y * sc->gc_width + x;
sc->gc_image->data[offset] = vga_get_text_pixel(sc, x, y);
}
}
}
void
vga_render(struct bhyvegc *gc, void *arg)
{
struct vga_softc *sc = arg;
vga_check_size(gc, sc);
if (vga_in_reset(sc)) {
memset(sc->gc_image->data, 0,
sc->gc_image->width * sc->gc_image->height *
sizeof (uint32_t));
return;
}
if (sc->vga_gc.gc_misc_gm && (sc->vga_atc.atc_mode & ATC_MC_GA))
vga_render_graphics(sc);
else
vga_render_text(sc);
}
static uint64_t
vga_mem_rd_handler(struct vmctx *ctx, uint64_t addr, void *arg1)
{
struct vga_softc *sc = arg1;
uint8_t map_sel;
int offset;
offset = addr;
switch (sc->vga_gc.gc_misc_mm) {
case 0x0:
/*
* extended mode: base 0xa0000 size 128k
*/
offset -=0xa0000;
offset &= (128 * KB - 1);
break;
case 0x1:
/*
* EGA/VGA mode: base 0xa0000 size 64k
*/
offset -=0xa0000;
offset &= (64 * KB - 1);
break;
case 0x2:
/*
* monochrome text mode: base 0xb0000 size 32kb
*/
assert(0);
case 0x3:
/*
* color text mode and CGA: base 0xb8000 size 32kb
*/
offset -=0xb8000;
offset &= (32 * KB - 1);
break;
}
/* Fill latches. */
sc->vga_gc.gc_latch0 = sc->vga_ram[offset + 0*64*KB];
sc->vga_gc.gc_latch1 = sc->vga_ram[offset + 1*64*KB];
sc->vga_gc.gc_latch2 = sc->vga_ram[offset + 2*64*KB];
sc->vga_gc.gc_latch3 = sc->vga_ram[offset + 3*64*KB];
if (sc->vga_gc.gc_mode_rm) {
/* read mode 1 */
assert(0);
}
map_sel = sc->vga_gc.gc_read_map_sel;
if (sc->vga_gc.gc_mode_oe) {
map_sel |= (offset & 1);
offset &= ~1;
}
/* read mode 0: return the byte from the selected plane. */
offset += map_sel * 64*KB;
return (sc->vga_ram[offset]);
}
static void
vga_mem_wr_handler(struct vmctx *ctx, uint64_t addr, uint8_t val, void *arg1)
{
struct vga_softc *sc = arg1;
uint8_t c0, c1, c2, c3;
uint8_t m0, m1, m2, m3;
uint8_t set_reset;
uint8_t enb_set_reset;
uint8_t mask;
int offset;
offset = addr;
switch (sc->vga_gc.gc_misc_mm) {
case 0x0:
/*
* extended mode: base 0xa0000 size 128kb
*/
offset -=0xa0000;
offset &= (128 * KB - 1);
break;
case 0x1:
/*
* EGA/VGA mode: base 0xa0000 size 64kb
*/
offset -=0xa0000;
offset &= (64 * KB - 1);
break;
case 0x2:
/*
* monochrome text mode: base 0xb0000 size 32kb
*/
assert(0);
case 0x3:
/*
* color text mode and CGA: base 0xb8000 size 32kb
*/
offset -=0xb8000;
offset &= (32 * KB - 1);
break;
}
set_reset = sc->vga_gc.gc_set_reset;
enb_set_reset = sc->vga_gc.gc_enb_set_reset;
c0 = sc->vga_gc.gc_latch0;
c1 = sc->vga_gc.gc_latch1;
c2 = sc->vga_gc.gc_latch2;
c3 = sc->vga_gc.gc_latch3;
switch (sc->vga_gc.gc_mode_wm) {
case 0:
/* write mode 0 */
mask = sc->vga_gc.gc_bit_mask;
val = (val >> sc->vga_gc.gc_rotate) |
(val << (8 - sc->vga_gc.gc_rotate));
switch (sc->vga_gc.gc_op) {
case 0x00: /* replace */
m0 = (set_reset & 1) ? mask : 0x00;
m1 = (set_reset & 2) ? mask : 0x00;
m2 = (set_reset & 4) ? mask : 0x00;
m3 = (set_reset & 8) ? mask : 0x00;
c0 = (enb_set_reset & 1) ? (c0 & ~mask) : (val & mask);
c1 = (enb_set_reset & 2) ? (c1 & ~mask) : (val & mask);
c2 = (enb_set_reset & 4) ? (c2 & ~mask) : (val & mask);
c3 = (enb_set_reset & 8) ? (c3 & ~mask) : (val & mask);
c0 |= m0;
c1 |= m1;
c2 |= m2;
c3 |= m3;
break;
case 0x08: /* AND */
m0 = set_reset & 1 ? 0xff : ~mask;
m1 = set_reset & 2 ? 0xff : ~mask;
m2 = set_reset & 4 ? 0xff : ~mask;
m3 = set_reset & 8 ? 0xff : ~mask;
c0 = enb_set_reset & 1 ? c0 & m0 : val & m0;
c1 = enb_set_reset & 2 ? c1 & m1 : val & m1;
c2 = enb_set_reset & 4 ? c2 & m2 : val & m2;
c3 = enb_set_reset & 8 ? c3 & m3 : val & m3;
break;
case 0x10: /* OR */
m0 = set_reset & 1 ? mask : 0x00;
m1 = set_reset & 2 ? mask : 0x00;
m2 = set_reset & 4 ? mask : 0x00;
m3 = set_reset & 8 ? mask : 0x00;
c0 = enb_set_reset & 1 ? c0 | m0 : val | m0;
c1 = enb_set_reset & 2 ? c1 | m1 : val | m1;
c2 = enb_set_reset & 4 ? c2 | m2 : val | m2;
c3 = enb_set_reset & 8 ? c3 | m3 : val | m3;
break;
case 0x18: /* XOR */
m0 = set_reset & 1 ? mask : 0x00;
m1 = set_reset & 2 ? mask : 0x00;
m2 = set_reset & 4 ? mask : 0x00;
m3 = set_reset & 8 ? mask : 0x00;
c0 = enb_set_reset & 1 ? c0 ^ m0 : val ^ m0;
c1 = enb_set_reset & 2 ? c1 ^ m1 : val ^ m1;
c2 = enb_set_reset & 4 ? c2 ^ m2 : val ^ m2;
c3 = enb_set_reset & 8 ? c3 ^ m3 : val ^ m3;
break;
}
break;
case 1:
/* write mode 1 */
break;
case 2:
/* write mode 2 */
mask = sc->vga_gc.gc_bit_mask;
switch (sc->vga_gc.gc_op) {
case 0x00: /* replace */
m0 = (val & 1 ? 0xff : 0x00) & mask;
m1 = (val & 2 ? 0xff : 0x00) & mask;
m2 = (val & 4 ? 0xff : 0x00) & mask;
m3 = (val & 8 ? 0xff : 0x00) & mask;
c0 &= ~mask;
c1 &= ~mask;
c2 &= ~mask;
c3 &= ~mask;
c0 |= m0;
c1 |= m1;
c2 |= m2;
c3 |= m3;
break;
case 0x08: /* AND */
m0 = (val & 1 ? 0xff : 0x00) | ~mask;
m1 = (val & 2 ? 0xff : 0x00) | ~mask;
m2 = (val & 4 ? 0xff : 0x00) | ~mask;
m3 = (val & 8 ? 0xff : 0x00) | ~mask;
c0 &= m0;
c1 &= m1;
c2 &= m2;
c3 &= m3;
break;
case 0x10: /* OR */
m0 = (val & 1 ? 0xff : 0x00) & mask;
m1 = (val & 2 ? 0xff : 0x00) & mask;
m2 = (val & 4 ? 0xff : 0x00) & mask;
m3 = (val & 8 ? 0xff : 0x00) & mask;
c0 |= m0;
c1 |= m1;
c2 |= m2;
c3 |= m3;
break;
case 0x18: /* XOR */
m0 = (val & 1 ? 0xff : 0x00) & mask;
m1 = (val & 2 ? 0xff : 0x00) & mask;
m2 = (val & 4 ? 0xff : 0x00) & mask;
m3 = (val & 8 ? 0xff : 0x00) & mask;
c0 ^= m0;
c1 ^= m1;
c2 ^= m2;
c3 ^= m3;
break;
}
break;
case 3:
/* write mode 3 */
mask = sc->vga_gc.gc_bit_mask & val;
val = (val >> sc->vga_gc.gc_rotate) |
(val << (8 - sc->vga_gc.gc_rotate));
switch (sc->vga_gc.gc_op) {
case 0x00: /* replace */
m0 = (set_reset & 1 ? 0xff : 0x00) & mask;
m1 = (set_reset & 2 ? 0xff : 0x00) & mask;
m2 = (set_reset & 4 ? 0xff : 0x00) & mask;
m3 = (set_reset & 8 ? 0xff : 0x00) & mask;
c0 &= ~mask;
c1 &= ~mask;
c2 &= ~mask;
c3 &= ~mask;
c0 |= m0;
c1 |= m1;
c2 |= m2;
c3 |= m3;
break;
case 0x08: /* AND */
m0 = (set_reset & 1 ? 0xff : 0x00) | ~mask;
m1 = (set_reset & 2 ? 0xff : 0x00) | ~mask;
m2 = (set_reset & 4 ? 0xff : 0x00) | ~mask;
m3 = (set_reset & 8 ? 0xff : 0x00) | ~mask;
c0 &= m0;
c1 &= m1;
c2 &= m2;
c3 &= m3;
break;
case 0x10: /* OR */
m0 = (set_reset & 1 ? 0xff : 0x00) & mask;
m1 = (set_reset & 2 ? 0xff : 0x00) & mask;
m2 = (set_reset & 4 ? 0xff : 0x00) & mask;
m3 = (set_reset & 8 ? 0xff : 0x00) & mask;
c0 |= m0;
c1 |= m1;
c2 |= m2;
c3 |= m3;
break;
case 0x18: /* XOR */
m0 = (set_reset & 1 ? 0xff : 0x00) & mask;
m1 = (set_reset & 2 ? 0xff : 0x00) & mask;
m2 = (set_reset & 4 ? 0xff : 0x00) & mask;
m3 = (set_reset & 8 ? 0xff : 0x00) & mask;
c0 ^= m0;
c1 ^= m1;
c2 ^= m2;
c3 ^= m3;
break;
}
break;
}
if (sc->vga_gc.gc_mode_oe) {
if (offset & 1) {
offset &= ~1;
if (sc->vga_seq.seq_map_mask & 2)
sc->vga_ram[offset + 1*64*KB] = c1;
if (sc->vga_seq.seq_map_mask & 8)
sc->vga_ram[offset + 3*64*KB] = c3;
} else {
if (sc->vga_seq.seq_map_mask & 1)
sc->vga_ram[offset + 0*64*KB] = c0;
if (sc->vga_seq.seq_map_mask & 4)
sc->vga_ram[offset + 2*64*KB] = c2;
}
} else {
if (sc->vga_seq.seq_map_mask & 1)
sc->vga_ram[offset + 0*64*KB] = c0;
if (sc->vga_seq.seq_map_mask & 2)
sc->vga_ram[offset + 1*64*KB] = c1;
if (sc->vga_seq.seq_map_mask & 4)
sc->vga_ram[offset + 2*64*KB] = c2;
if (sc->vga_seq.seq_map_mask & 8)
sc->vga_ram[offset + 3*64*KB] = c3;
}
}
static int
vga_mem_handler(struct vmctx *ctx, int vcpu, int dir, uint64_t addr,
int size, uint64_t *val, void *arg1, long arg2)
{
if (dir == MEM_F_WRITE) {
switch (size) {
case 1:
vga_mem_wr_handler(ctx, addr, *val, arg1);
break;
case 2:
vga_mem_wr_handler(ctx, addr, *val, arg1);
vga_mem_wr_handler(ctx, addr + 1, *val >> 8, arg1);
break;
case 4:
vga_mem_wr_handler(ctx, addr, *val, arg1);
vga_mem_wr_handler(ctx, addr + 1, *val >> 8, arg1);
vga_mem_wr_handler(ctx, addr + 2, *val >> 16, arg1);
vga_mem_wr_handler(ctx, addr + 3, *val >> 24, arg1);
break;
case 8:
vga_mem_wr_handler(ctx, addr, *val, arg1);
vga_mem_wr_handler(ctx, addr + 1, *val >> 8, arg1);
vga_mem_wr_handler(ctx, addr + 2, *val >> 16, arg1);
vga_mem_wr_handler(ctx, addr + 3, *val >> 24, arg1);
vga_mem_wr_handler(ctx, addr + 4, *val >> 32, arg1);
vga_mem_wr_handler(ctx, addr + 5, *val >> 40, arg1);
vga_mem_wr_handler(ctx, addr + 6, *val >> 48, arg1);
vga_mem_wr_handler(ctx, addr + 7, *val >> 56, arg1);
break;
}
} else {
switch (size) {
case 1:
*val = vga_mem_rd_handler(ctx, addr, arg1);
break;
case 2:
*val = vga_mem_rd_handler(ctx, addr, arg1);
*val |= vga_mem_rd_handler(ctx, addr + 1, arg1) << 8;
break;
case 4:
*val = vga_mem_rd_handler(ctx, addr, arg1);
*val |= vga_mem_rd_handler(ctx, addr + 1, arg1) << 8;
*val |= vga_mem_rd_handler(ctx, addr + 2, arg1) << 16;
*val |= vga_mem_rd_handler(ctx, addr + 3, arg1) << 24;
break;
case 8:
*val = vga_mem_rd_handler(ctx, addr, arg1);
*val |= vga_mem_rd_handler(ctx, addr + 1, arg1) << 8;
*val |= vga_mem_rd_handler(ctx, addr + 2, arg1) << 16;
*val |= vga_mem_rd_handler(ctx, addr + 3, arg1) << 24;
*val |= vga_mem_rd_handler(ctx, addr + 4, arg1) << 32;
*val |= vga_mem_rd_handler(ctx, addr + 5, arg1) << 40;
*val |= vga_mem_rd_handler(ctx, addr + 6, arg1) << 48;
*val |= vga_mem_rd_handler(ctx, addr + 7, arg1) << 56;
break;
}
}
return (0);
}
static int
vga_port_in_handler(struct vmctx *ctx, int in, int port, int bytes,
uint8_t *val, void *arg)
{
struct vga_softc *sc = arg;
switch (port) {
case CRTC_IDX_MONO_PORT:
case CRTC_IDX_COLOR_PORT:
*val = sc->vga_crtc.crtc_index;
break;
case CRTC_DATA_MONO_PORT:
case CRTC_DATA_COLOR_PORT:
switch (sc->vga_crtc.crtc_index) {
case CRTC_HORIZ_TOTAL:
*val = sc->vga_crtc.crtc_horiz_total;
break;
case CRTC_HORIZ_DISP_END:
*val = sc->vga_crtc.crtc_horiz_disp_end;
break;
case CRTC_START_HORIZ_BLANK:
*val = sc->vga_crtc.crtc_start_horiz_blank;
break;
case CRTC_END_HORIZ_BLANK:
*val = sc->vga_crtc.crtc_end_horiz_blank;
break;
case CRTC_START_HORIZ_RETRACE:
*val = sc->vga_crtc.crtc_start_horiz_retrace;
break;
case CRTC_END_HORIZ_RETRACE:
*val = sc->vga_crtc.crtc_end_horiz_retrace;
break;
case CRTC_VERT_TOTAL:
*val = sc->vga_crtc.crtc_vert_total;
break;
case CRTC_OVERFLOW:
*val = sc->vga_crtc.crtc_overflow;
break;
case CRTC_PRESET_ROW_SCAN:
*val = sc->vga_crtc.crtc_present_row_scan;
break;
case CRTC_MAX_SCAN_LINE:
*val = sc->vga_crtc.crtc_max_scan_line;
break;
case CRTC_CURSOR_START:
*val = sc->vga_crtc.crtc_cursor_start;
break;
case CRTC_CURSOR_END:
*val = sc->vga_crtc.crtc_cursor_end;
break;
case CRTC_START_ADDR_HIGH:
*val = sc->vga_crtc.crtc_start_addr_high;
break;
case CRTC_START_ADDR_LOW:
*val = sc->vga_crtc.crtc_start_addr_low;
break;
case CRTC_CURSOR_LOC_HIGH:
*val = sc->vga_crtc.crtc_cursor_loc_high;
break;
case CRTC_CURSOR_LOC_LOW:
*val = sc->vga_crtc.crtc_cursor_loc_low;
break;
case CRTC_VERT_RETRACE_START:
*val = sc->vga_crtc.crtc_vert_retrace_start;
break;
case CRTC_VERT_RETRACE_END:
*val = sc->vga_crtc.crtc_vert_retrace_end;
break;
case CRTC_VERT_DISP_END:
*val = sc->vga_crtc.crtc_vert_disp_end;
break;
case CRTC_OFFSET:
*val = sc->vga_crtc.crtc_offset;
break;
case CRTC_UNDERLINE_LOC:
*val = sc->vga_crtc.crtc_underline_loc;
break;
case CRTC_START_VERT_BLANK:
*val = sc->vga_crtc.crtc_start_vert_blank;
break;
case CRTC_END_VERT_BLANK:
*val = sc->vga_crtc.crtc_end_vert_blank;
break;
case CRTC_MODE_CONTROL:
*val = sc->vga_crtc.crtc_mode_ctrl;
break;
case CRTC_LINE_COMPARE:
*val = sc->vga_crtc.crtc_line_compare;
break;
default:
//printf("XXX VGA CRTC: inb 0x%04x at index %d\n", port, sc->vga_crtc.crtc_index);
assert(0);
break;
}
break;
case ATC_IDX_PORT:
*val = sc->vga_atc.atc_index;
break;
case ATC_DATA_PORT:
switch (sc->vga_atc.atc_index) {
case ATC_PALETTE0 ... ATC_PALETTE15:
*val = sc->vga_atc.atc_palette[sc->vga_atc.atc_index];
break;
case ATC_MODE_CONTROL:
*val = sc->vga_atc.atc_mode;
break;
case ATC_OVERSCAN_COLOR:
*val = sc->vga_atc.atc_overscan_color;
break;
case ATC_COLOR_PLANE_ENABLE:
*val = sc->vga_atc.atc_color_plane_enb;
break;
case ATC_HORIZ_PIXEL_PANNING:
*val = sc->vga_atc.atc_horiz_pixel_panning;
break;
case ATC_COLOR_SELECT:
*val = sc->vga_atc.atc_color_select;
break;
default:
//printf("XXX VGA ATC inb 0x%04x at index %d\n", port , sc->vga_atc.atc_index);
assert(0);
break;
}
break;
case SEQ_IDX_PORT:
*val = sc->vga_seq.seq_index;
break;
case SEQ_DATA_PORT:
switch (sc->vga_seq.seq_index) {
case SEQ_RESET:
*val = sc->vga_seq.seq_reset;
break;
case SEQ_CLOCKING_MODE:
*val = sc->vga_seq.seq_clock_mode;
break;
case SEQ_MAP_MASK:
*val = sc->vga_seq.seq_map_mask;
break;
case SEQ_CHAR_MAP_SELECT:
*val = sc->vga_seq.seq_cmap_sel;
break;
case SEQ_MEMORY_MODE:
*val = sc->vga_seq.seq_mm;
break;
default:
//printf("XXX VGA SEQ: inb 0x%04x at index %d\n", port, sc->vga_seq.seq_index);
assert(0);
break;
}
break;
case DAC_DATA_PORT:
*val = sc->vga_dac.dac_palette[3 * sc->vga_dac.dac_rd_index +
sc->vga_dac.dac_rd_subindex];
sc->vga_dac.dac_rd_subindex++;
if (sc->vga_dac.dac_rd_subindex == 3) {
sc->vga_dac.dac_rd_index++;
sc->vga_dac.dac_rd_subindex = 0;
}
break;
case GC_IDX_PORT:
*val = sc->vga_gc.gc_index;
break;
case GC_DATA_PORT:
switch (sc->vga_gc.gc_index) {
case GC_SET_RESET:
*val = sc->vga_gc.gc_set_reset;
break;
case GC_ENABLE_SET_RESET:
*val = sc->vga_gc.gc_enb_set_reset;
break;
case GC_COLOR_COMPARE:
*val = sc->vga_gc.gc_color_compare;
break;
case GC_DATA_ROTATE:
*val = sc->vga_gc.gc_rotate;
break;
case GC_READ_MAP_SELECT:
*val = sc->vga_gc.gc_read_map_sel;
break;
case GC_MODE:
*val = sc->vga_gc.gc_mode;
break;
case GC_MISCELLANEOUS:
*val = sc->vga_gc.gc_misc;
break;
case GC_COLOR_DONT_CARE:
*val = sc->vga_gc.gc_color_dont_care;
break;
case GC_BIT_MASK:
*val = sc->vga_gc.gc_bit_mask;
break;
default:
//printf("XXX VGA GC: inb 0x%04x at index %d\n", port, sc->vga_crtc.crtc_index);
assert(0);
break;
}
break;
case GEN_MISC_OUTPUT_PORT:
*val = sc->vga_misc;
break;
case GEN_INPUT_STS0_PORT:
assert(0);
break;
case GEN_INPUT_STS1_MONO_PORT:
case GEN_INPUT_STS1_COLOR_PORT:
sc->vga_atc.atc_flipflop = 0;
sc->vga_sts1 = GEN_IS1_VR | GEN_IS1_DE;
//sc->vga_sts1 ^= (GEN_IS1_VR | GEN_IS1_DE);
*val = sc->vga_sts1;
break;
case GEN_FEATURE_CTRL_PORT:
// OpenBSD calls this with bytes = 1
//assert(0);
*val = 0;
break;
case 0x3c3:
*val = 0;
break;
default:
printf("XXX vga_port_in_handler() unhandled port 0x%x\n", port);
//assert(0);
return (-1);
}
return (0);
}
static int
vga_port_out_handler(struct vmctx *ctx, int in, int port, int bytes,
uint8_t val, void *arg)
{
struct vga_softc *sc = arg;
switch (port) {
case CRTC_IDX_MONO_PORT:
case CRTC_IDX_COLOR_PORT:
sc->vga_crtc.crtc_index = val;
break;
case CRTC_DATA_MONO_PORT:
case CRTC_DATA_COLOR_PORT:
switch (sc->vga_crtc.crtc_index) {
case CRTC_HORIZ_TOTAL:
sc->vga_crtc.crtc_horiz_total = val;
break;
case CRTC_HORIZ_DISP_END:
sc->vga_crtc.crtc_horiz_disp_end = val;
break;
case CRTC_START_HORIZ_BLANK:
sc->vga_crtc.crtc_start_horiz_blank = val;
break;
case CRTC_END_HORIZ_BLANK:
sc->vga_crtc.crtc_end_horiz_blank = val;
break;
case CRTC_START_HORIZ_RETRACE:
sc->vga_crtc.crtc_start_horiz_retrace = val;
break;
case CRTC_END_HORIZ_RETRACE:
sc->vga_crtc.crtc_end_horiz_retrace = val;
break;
case CRTC_VERT_TOTAL:
sc->vga_crtc.crtc_vert_total = val;
break;
case CRTC_OVERFLOW:
sc->vga_crtc.crtc_overflow = val;
break;
case CRTC_PRESET_ROW_SCAN:
sc->vga_crtc.crtc_present_row_scan = val;
break;
case CRTC_MAX_SCAN_LINE:
sc->vga_crtc.crtc_max_scan_line = val;
break;
case CRTC_CURSOR_START:
sc->vga_crtc.crtc_cursor_start = val;
sc->vga_crtc.crtc_cursor_on = (val & CRTC_CS_CO) == 0;
break;
case CRTC_CURSOR_END:
sc->vga_crtc.crtc_cursor_end = val;
break;
case CRTC_START_ADDR_HIGH:
sc->vga_crtc.crtc_start_addr_high = val;
sc->vga_crtc.crtc_start_addr &= 0x00ff;
sc->vga_crtc.crtc_start_addr |= (val << 8);
break;
case CRTC_START_ADDR_LOW:
sc->vga_crtc.crtc_start_addr_low = val;
sc->vga_crtc.crtc_start_addr &= 0xff00;
sc->vga_crtc.crtc_start_addr |= (val & 0xff);
break;
case CRTC_CURSOR_LOC_HIGH:
sc->vga_crtc.crtc_cursor_loc_high = val;
sc->vga_crtc.crtc_cursor_loc &= 0x00ff;
sc->vga_crtc.crtc_cursor_loc |= (val << 8);
break;
case CRTC_CURSOR_LOC_LOW:
sc->vga_crtc.crtc_cursor_loc_low = val;
sc->vga_crtc.crtc_cursor_loc &= 0xff00;
sc->vga_crtc.crtc_cursor_loc |= (val & 0xff);
break;
case CRTC_VERT_RETRACE_START:
sc->vga_crtc.crtc_vert_retrace_start = val;
break;
case CRTC_VERT_RETRACE_END:
sc->vga_crtc.crtc_vert_retrace_end = val;
break;
case CRTC_VERT_DISP_END:
sc->vga_crtc.crtc_vert_disp_end = val;
break;
case CRTC_OFFSET:
sc->vga_crtc.crtc_offset = val;
break;
case CRTC_UNDERLINE_LOC:
sc->vga_crtc.crtc_underline_loc = val;
break;
case CRTC_START_VERT_BLANK:
sc->vga_crtc.crtc_start_vert_blank = val;
break;
case CRTC_END_VERT_BLANK:
sc->vga_crtc.crtc_end_vert_blank = val;
break;
case CRTC_MODE_CONTROL:
sc->vga_crtc.crtc_mode_ctrl = val;
break;
case CRTC_LINE_COMPARE:
sc->vga_crtc.crtc_line_compare = val;
break;
default:
//printf("XXX VGA CRTC: outb 0x%04x, 0x%02x at index %d\n", port, val, sc->vga_crtc.crtc_index);
assert(0);
break;
}
break;
case ATC_IDX_PORT:
if (sc->vga_atc.atc_flipflop == 0) {
if (sc->vga_atc.atc_index & 0x20)
assert(0);
sc->vga_atc.atc_index = val & ATC_IDX_MASK;
} else {
switch (sc->vga_atc.atc_index) {
case ATC_PALETTE0 ... ATC_PALETTE15:
sc->vga_atc.atc_palette[sc->vga_atc.atc_index] = val & 0x3f;
break;
case ATC_MODE_CONTROL:
sc->vga_atc.atc_mode = val;
break;
case ATC_OVERSCAN_COLOR:
sc->vga_atc.atc_overscan_color = val;
break;
case ATC_COLOR_PLANE_ENABLE:
sc->vga_atc.atc_color_plane_enb = val;
break;
case ATC_HORIZ_PIXEL_PANNING:
sc->vga_atc.atc_horiz_pixel_panning = val;
break;
case ATC_COLOR_SELECT:
sc->vga_atc.atc_color_select = val;
sc->vga_atc.atc_color_select_45 =
(val & ATC_CS_C45) << 4;
sc->vga_atc.atc_color_select_67 =
(val & ATC_CS_C67) << 6;
break;
default:
//printf("XXX VGA ATC: outb 0x%04x, 0x%02x at index %d\n", port, val, sc->vga_atc.atc_index);
assert(0);
break;
}
}
sc->vga_atc.atc_flipflop ^= 1;
break;
case ATC_DATA_PORT:
break;
case SEQ_IDX_PORT:
sc->vga_seq.seq_index = val & 0x1f;
break;
case SEQ_DATA_PORT:
switch (sc->vga_seq.seq_index) {
case SEQ_RESET:
sc->vga_seq.seq_reset = val;
break;
case SEQ_CLOCKING_MODE:
sc->vga_seq.seq_clock_mode = val;
sc->vga_seq.seq_cm_dots = (val & SEQ_CM_89) ? 8 : 9;
break;
case SEQ_MAP_MASK:
sc->vga_seq.seq_map_mask = val;
break;
case SEQ_CHAR_MAP_SELECT:
sc->vga_seq.seq_cmap_sel = val;
sc->vga_seq.seq_cmap_pri_off = ((((val & SEQ_CMS_SA) >> SEQ_CMS_SA_SHIFT) * 2) + ((val & SEQ_CMS_SAH) >> SEQ_CMS_SAH_SHIFT)) * 8 * KB;
sc->vga_seq.seq_cmap_sec_off = ((((val & SEQ_CMS_SB) >> SEQ_CMS_SB_SHIFT) * 2) + ((val & SEQ_CMS_SBH) >> SEQ_CMS_SBH_SHIFT)) * 8 * KB;
break;
case SEQ_MEMORY_MODE:
sc->vga_seq.seq_mm = val;
/* Windows queries Chain4 */
//assert((sc->vga_seq.seq_mm & SEQ_MM_C4) == 0);
break;
default:
//printf("XXX VGA SEQ: outb 0x%04x, 0x%02x at index %d\n", port, val, sc->vga_seq.seq_index);
assert(0);
break;
}
break;
case DAC_MASK:
break;
case DAC_IDX_RD_PORT:
sc->vga_dac.dac_rd_index = val;
sc->vga_dac.dac_rd_subindex = 0;
break;
case DAC_IDX_WR_PORT:
sc->vga_dac.dac_wr_index = val;
sc->vga_dac.dac_wr_subindex = 0;
break;
case DAC_DATA_PORT:
sc->vga_dac.dac_palette[3 * sc->vga_dac.dac_wr_index +
sc->vga_dac.dac_wr_subindex] = val;
sc->vga_dac.dac_wr_subindex++;
if (sc->vga_dac.dac_wr_subindex == 3) {
sc->vga_dac.dac_palette_rgb[sc->vga_dac.dac_wr_index] =
((((sc->vga_dac.dac_palette[3*sc->vga_dac.dac_wr_index + 0] << 2) |
((sc->vga_dac.dac_palette[3*sc->vga_dac.dac_wr_index + 0] & 0x1) << 1) |
(sc->vga_dac.dac_palette[3*sc->vga_dac.dac_wr_index + 0] & 0x1)) << 16) |
(((sc->vga_dac.dac_palette[3*sc->vga_dac.dac_wr_index + 1] << 2) |
((sc->vga_dac.dac_palette[3*sc->vga_dac.dac_wr_index + 1] & 0x1) << 1) |
(sc->vga_dac.dac_palette[3*sc->vga_dac.dac_wr_index + 1] & 0x1)) << 8) |
(((sc->vga_dac.dac_palette[3*sc->vga_dac.dac_wr_index + 2] << 2) |
((sc->vga_dac.dac_palette[3*sc->vga_dac.dac_wr_index + 2] & 0x1) << 1) |
(sc->vga_dac.dac_palette[3*sc->vga_dac.dac_wr_index + 2] & 0x1)) << 0));
sc->vga_dac.dac_wr_index++;
sc->vga_dac.dac_wr_subindex = 0;
}
break;
case GC_IDX_PORT:
sc->vga_gc.gc_index = val;
break;
case GC_DATA_PORT:
switch (sc->vga_gc.gc_index) {
case GC_SET_RESET:
sc->vga_gc.gc_set_reset = val;
break;
case GC_ENABLE_SET_RESET:
sc->vga_gc.gc_enb_set_reset = val;
break;
case GC_COLOR_COMPARE:
sc->vga_gc.gc_color_compare = val;
break;
case GC_DATA_ROTATE:
sc->vga_gc.gc_rotate = val;
sc->vga_gc.gc_op = (val >> 3) & 0x3;
break;
case GC_READ_MAP_SELECT:
sc->vga_gc.gc_read_map_sel = val;
break;
case GC_MODE:
sc->vga_gc.gc_mode = val;
sc->vga_gc.gc_mode_c4 = (val & GC_MODE_C4) != 0;
assert(!sc->vga_gc.gc_mode_c4);
sc->vga_gc.gc_mode_oe = (val & GC_MODE_OE) != 0;
sc->vga_gc.gc_mode_rm = (val >> 3) & 0x1;
sc->vga_gc.gc_mode_wm = val & 0x3;
if (sc->gc_image)
sc->gc_image->vgamode = 1;
break;
case GC_MISCELLANEOUS:
sc->vga_gc.gc_misc = val;
sc->vga_gc.gc_misc_gm = val & GC_MISC_GM;
sc->vga_gc.gc_misc_mm = (val & GC_MISC_MM) >>
GC_MISC_MM_SHIFT;
break;
case GC_COLOR_DONT_CARE:
sc->vga_gc.gc_color_dont_care = val;
break;
case GC_BIT_MASK:
sc->vga_gc.gc_bit_mask = val;
break;
default:
//printf("XXX VGA GC: outb 0x%04x, 0x%02x at index %d\n", port, val, sc->vga_gc.gc_index);
assert(0);
break;
}
break;
case GEN_INPUT_STS0_PORT:
/* write to Miscellaneous Output Register */
sc->vga_misc = val;
break;
case GEN_INPUT_STS1_MONO_PORT:
case GEN_INPUT_STS1_COLOR_PORT:
/* write to Feature Control Register */
break;
// case 0x3c3:
// break;
default:
printf("XXX vga_port_out_handler() unhandled port 0x%x, val 0x%x\n", port, val);
//assert(0);
return (-1);
}
return (0);
}
static int
vga_port_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
uint32_t *eax, void *arg)
{
uint8_t val;
int error;
switch (bytes) {
case 1:
if (in) {
*eax &= ~0xff;
error = vga_port_in_handler(ctx, in, port, 1,
&val, arg);
if (!error) {
*eax |= val & 0xff;
}
} else {
val = *eax & 0xff;
error = vga_port_out_handler(ctx, in, port, 1,
val, arg);
}
break;
case 2:
if (in) {
*eax &= ~0xffff;
error = vga_port_in_handler(ctx, in, port, 1,
&val, arg);
if (!error) {
*eax |= val & 0xff;
}
error = vga_port_in_handler(ctx, in, port + 1, 1,
&val, arg);
if (!error) {
*eax |= (val & 0xff) << 8;
}
} else {
val = *eax & 0xff;
error = vga_port_out_handler(ctx, in, port, 1,
val, arg);
val = (*eax >> 8) & 0xff;
error =vga_port_out_handler(ctx, in, port + 1, 1,
val, arg);
}
break;
default:
assert(0);
return (-1);
}
return (error);
}
void *
vga_init(int io_only)
{
struct inout_port iop;
struct vga_softc *sc;
int port, error;
sc = calloc(1, sizeof(struct vga_softc));
bzero(&iop, sizeof(struct inout_port));
iop.name = "VGA";
for (port = VGA_IOPORT_START; port <= VGA_IOPORT_END; port++) {
iop.port = port;
iop.size = 1;
iop.flags = IOPORT_F_INOUT;
iop.handler = vga_port_handler;
iop.arg = sc;
error = register_inout(&iop);
assert(error == 0);
}
sc->gc_image = console_get_image();
/* only handle io ports; vga graphics is disabled */
if (io_only)
return(sc);
sc->mr.name = "VGA memory";
sc->mr.flags = MEM_F_RW;
sc->mr.base = 640 * KB;
sc->mr.size = 128 * KB;
sc->mr.handler = vga_mem_handler;
sc->mr.arg1 = sc;
error = register_mem_fallback(&sc->mr);
assert(error == 0);
sc->vga_ram = malloc(256 * KB);
memset(sc->vga_ram, 0, 256 * KB);
{
static uint8_t palette[] = {
0x00,0x00,0x00, 0x00,0x00,0x2a, 0x00,0x2a,0x00, 0x00,0x2a,0x2a,
0x2a,0x00,0x00, 0x2a,0x00,0x2a, 0x2a,0x2a,0x00, 0x2a,0x2a,0x2a,
0x00,0x00,0x15, 0x00,0x00,0x3f, 0x00,0x2a,0x15, 0x00,0x2a,0x3f,
0x2a,0x00,0x15, 0x2a,0x00,0x3f, 0x2a,0x2a,0x15, 0x2a,0x2a,0x3f,
};
int i;
memcpy(sc->vga_dac.dac_palette, palette, 16 * 3 * sizeof (uint8_t));
for (i = 0; i < 16; i++) {
sc->vga_dac.dac_palette_rgb[i] =
((((sc->vga_dac.dac_palette[3*i + 0] << 2) |
((sc->vga_dac.dac_palette[3*i + 0] & 0x1) << 1) |
(sc->vga_dac.dac_palette[3*i + 0] & 0x1)) << 16) |
(((sc->vga_dac.dac_palette[3*i + 1] << 2) |
((sc->vga_dac.dac_palette[3*i + 1] & 0x1) << 1) |
(sc->vga_dac.dac_palette[3*i + 1] & 0x1)) << 8) |
(((sc->vga_dac.dac_palette[3*i + 2] << 2) |
((sc->vga_dac.dac_palette[3*i + 2] & 0x1) << 1) |
(sc->vga_dac.dac_palette[3*i + 2] & 0x1)) << 0));
}
}
return (sc);
}
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