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qemu/hw/display/artist.c
Philippe Mathieu-Daudé eb9b2ee8f6 hw/display/artist: Remove dead code (CID 1419388 & 1419389) 
Coverity reports:

  *** CID 1419388:  Control flow issues  (DEADCODE)
  /hw/display/artist.c: 739 in draw_line_xy()
  733         if (endy < 0) {
  734             endy = 0;
  735         }
  736
  737
  738         if (endx < 0) {
  >>>     CID 1419388:  Control flow issues  (DEADCODE)
  >>>     Execution cannot reach this statement: "return;".
  739             return;
  740         }
  741
  742         if (endy < 0) {
  743             return;
  744         }

  *** CID 1419389:  Control flow issues  (DEADCODE)
  /hw/display/artist.c: 743 in draw_line_xy()
  737
  738         if (endx < 0) {
  739             return;
  740         }
  741
  742         if (endy < 0) {
  >>>     CID 1419389:  Control flow issues  (DEADCODE)
  >>>     Execution cannot reach this statement: "return;".
  743             return;
  744         }
  745
  746         trace_artist_draw_line(startx, starty, endx, endy);
  747         draw_line(s, startx, starty, endx, endy, false, -1, -1);
  748     }

Fixes: Covertiy CID 1419388 and 1419389 (commit 4765384ce3)
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Acked-by: Sven Schnelle <svens@stackframe.org>
Message-Id: <20200214001303.12873-6-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-02-18 11:21:47 -08:00

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/*
* QEMU HP Artist Emulation
*
* Copyright (c) 2019 Sven Schnelle <svens@stackframe.org>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/error-report.h"
#include "qemu/typedefs.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qemu/units.h"
#include "qapi/error.h"
#include "hw/sysbus.h"
#include "hw/loader.h"
#include "hw/qdev-core.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "ui/console.h"
#include "trace.h"
#include "hw/display/framebuffer.h"
#define TYPE_ARTIST "artist"
#define ARTIST(obj) OBJECT_CHECK(ARTISTState, (obj), TYPE_ARTIST)
#ifdef HOST_WORDS_BIGENDIAN
#define ROP8OFF(_i) (3 - (_i))
#else
#define ROP8OFF
#endif
struct vram_buffer {
MemoryRegion mr;
uint8_t *data;
int size;
int width;
int height;
};
typedef struct ARTISTState {
SysBusDevice parent_obj;
QemuConsole *con;
MemoryRegion vram_mem;
MemoryRegion mem_as_root;
MemoryRegion reg;
MemoryRegionSection fbsection;
void *vram_int_mr;
AddressSpace as;
struct vram_buffer vram_buffer[16];
uint16_t width;
uint16_t height;
uint16_t depth;
uint32_t fg_color;
uint32_t bg_color;
uint32_t vram_char_y;
uint32_t vram_bitmask;
uint32_t vram_start;
uint32_t vram_pos;
uint32_t vram_size;
uint32_t blockmove_source;
uint32_t blockmove_dest;
uint32_t blockmove_size;
uint32_t line_size;
uint32_t line_end;
uint32_t line_xy;
uint32_t line_pattern_start;
uint32_t line_pattern_skip;
uint32_t cursor_pos;
uint32_t cursor_height;
uint32_t cursor_width;
uint32_t plane_mask;
uint32_t reg_100080;
uint32_t reg_300200;
uint32_t reg_300208;
uint32_t reg_300218;
uint32_t cmap_bm_access;
uint32_t dst_bm_access;
uint32_t src_bm_access;
uint32_t control_plane;
uint32_t transfer_data;
uint32_t image_bitmap_op;
uint32_t font_write1;
uint32_t font_write2;
uint32_t font_write_pos_y;
int draw_line_pattern;
} ARTISTState;
typedef enum {
ARTIST_BUFFER_AP = 1,
ARTIST_BUFFER_OVERLAY = 2,
ARTIST_BUFFER_CURSOR1 = 6,
ARTIST_BUFFER_CURSOR2 = 7,
ARTIST_BUFFER_ATTRIBUTE = 13,
ARTIST_BUFFER_CMAP = 15,
} artist_buffer_t;
typedef enum {
VRAM_IDX = 0x1004a0,
VRAM_BITMASK = 0x1005a0,
VRAM_WRITE_INCR_X = 0x100600,
VRAM_WRITE_INCR_X2 = 0x100604,
VRAM_WRITE_INCR_Y = 0x100620,
VRAM_START = 0x100800,
BLOCK_MOVE_SIZE = 0x100804,
BLOCK_MOVE_SOURCE = 0x100808,
TRANSFER_DATA = 0x100820,
FONT_WRITE_INCR_Y = 0x1008a0,
VRAM_START_TRIGGER = 0x100a00,
VRAM_SIZE_TRIGGER = 0x100a04,
FONT_WRITE_START = 0x100aa0,
BLOCK_MOVE_DEST_TRIGGER = 0x100b00,
BLOCK_MOVE_SIZE_TRIGGER = 0x100b04,
LINE_XY = 0x100ccc,
PATTERN_LINE_START = 0x100ecc,
LINE_SIZE = 0x100e04,
LINE_END = 0x100e44,
CMAP_BM_ACCESS = 0x118000,
DST_BM_ACCESS = 0x118004,
SRC_BM_ACCESS = 0x118008,
CONTROL_PLANE = 0x11800c,
FG_COLOR = 0x118010,
BG_COLOR = 0x118014,
PLANE_MASK = 0x118018,
IMAGE_BITMAP_OP = 0x11801c,
CURSOR_POS = 0x300100,
CURSOR_CTRL = 0x300104,
} artist_reg_t;
typedef enum {
ARTIST_ROP_CLEAR = 0,
ARTIST_ROP_COPY = 3,
ARTIST_ROP_XOR = 6,
ARTIST_ROP_NOT_DST = 10,
ARTIST_ROP_SET = 15,
} artist_rop_t;
#define REG_NAME(_x) case _x: return " "#_x;
static const char *artist_reg_name(uint64_t addr)
{
switch ((artist_reg_t)addr) {
REG_NAME(VRAM_IDX);
REG_NAME(VRAM_BITMASK);
REG_NAME(VRAM_WRITE_INCR_X);
REG_NAME(VRAM_WRITE_INCR_X2);
REG_NAME(VRAM_WRITE_INCR_Y);
REG_NAME(VRAM_START);
REG_NAME(BLOCK_MOVE_SIZE);
REG_NAME(BLOCK_MOVE_SOURCE);
REG_NAME(FG_COLOR);
REG_NAME(BG_COLOR);
REG_NAME(PLANE_MASK);
REG_NAME(VRAM_START_TRIGGER);
REG_NAME(VRAM_SIZE_TRIGGER);
REG_NAME(BLOCK_MOVE_DEST_TRIGGER);
REG_NAME(BLOCK_MOVE_SIZE_TRIGGER);
REG_NAME(TRANSFER_DATA);
REG_NAME(CONTROL_PLANE);
REG_NAME(IMAGE_BITMAP_OP);
REG_NAME(CMAP_BM_ACCESS);
REG_NAME(DST_BM_ACCESS);
REG_NAME(SRC_BM_ACCESS);
REG_NAME(CURSOR_POS);
REG_NAME(CURSOR_CTRL);
REG_NAME(LINE_XY);
REG_NAME(PATTERN_LINE_START);
REG_NAME(LINE_SIZE);
REG_NAME(LINE_END);
REG_NAME(FONT_WRITE_INCR_Y);
REG_NAME(FONT_WRITE_START);
}
return "";
}
#undef REG_NAME
static int16_t artist_get_x(uint32_t reg)
{
return reg >> 16;
}
static int16_t artist_get_y(uint32_t reg)
{
return reg & 0xffff;
}
static void artist_invalidate_lines(struct vram_buffer *buf,
int starty, int height)
{
int start = starty * buf->width;
int size = height * buf->width;
if (start + size <= buf->size) {
memory_region_set_dirty(&buf->mr, start, size);
}
}
static int vram_write_pix_per_transfer(ARTISTState *s)
{
if (s->cmap_bm_access) {
return 1 << ((s->cmap_bm_access >> 27) & 0x0f);
} else {
return 1 << ((s->dst_bm_access >> 27) & 0x0f);
}
}
static int vram_pixel_length(ARTISTState *s)
{
if (s->cmap_bm_access) {
return (s->cmap_bm_access >> 24) & 0x07;
} else {
return (s->dst_bm_access >> 24) & 0x07;
}
}
static int vram_write_bufidx(ARTISTState *s)
{
if (s->cmap_bm_access) {
return (s->cmap_bm_access >> 12) & 0x0f;
} else {
return (s->dst_bm_access >> 12) & 0x0f;
}
}
static int vram_read_bufidx(ARTISTState *s)
{
if (s->cmap_bm_access) {
return (s->cmap_bm_access >> 12) & 0x0f;
} else {
return (s->src_bm_access >> 12) & 0x0f;
}
}
static struct vram_buffer *vram_read_buffer(ARTISTState *s)
{
return &s->vram_buffer[vram_read_bufidx(s)];
}
static struct vram_buffer *vram_write_buffer(ARTISTState *s)
{
return &s->vram_buffer[vram_write_bufidx(s)];
}
static uint8_t artist_get_color(ARTISTState *s)
{
if (s->image_bitmap_op & 2) {
return s->fg_color;
} else {
return s->bg_color;
}
}
static artist_rop_t artist_get_op(ARTISTState *s)
{
return (s->image_bitmap_op >> 8) & 0xf;
}
static void artist_rop8(ARTISTState *s, uint8_t *dst, uint8_t val)
{
const artist_rop_t op = artist_get_op(s);
uint8_t plane_mask = s->plane_mask & 0xff;
switch (op) {
case ARTIST_ROP_CLEAR:
*dst &= ~plane_mask;
break;
case ARTIST_ROP_COPY:
*dst &= ~plane_mask;
*dst |= val & plane_mask;
break;
case ARTIST_ROP_XOR:
*dst ^= val & plane_mask;
break;
case ARTIST_ROP_NOT_DST:
*dst ^= plane_mask;
break;
case ARTIST_ROP_SET:
*dst |= plane_mask;
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unsupported rop %d\n", __func__, op);
break;
}
}
static void artist_get_cursor_pos(ARTISTState *s, int *x, int *y)
{
/*
* Don't know whether these magic offset values are configurable via
* some register. They are the same for all resolutions, so don't
* bother about it.
*/
*y = 0x47a - artist_get_y(s->cursor_pos);
*x = ((artist_get_x(s->cursor_pos) - 338) / 2);
if (*x > s->width) {
*x = 0;
}
if (*y > s->height) {
*y = 0;
}
}
static void artist_invalidate_cursor(ARTISTState *s)
{
int x, y;
artist_get_cursor_pos(s, &x, &y);
artist_invalidate_lines(&s->vram_buffer[ARTIST_BUFFER_AP],
y, s->cursor_height);
}
static void vram_bit_write(ARTISTState *s, int posx, int posy, bool incr_x,
int size, uint32_t data)
{
struct vram_buffer *buf;
uint32_t vram_bitmask = s->vram_bitmask;
int mask, i, pix_count, pix_length, offset, height, width;
uint8_t *data8, *p;
pix_count = vram_write_pix_per_transfer(s);
pix_length = vram_pixel_length(s);
buf = vram_write_buffer(s);
height = buf->height;
width = buf->width;
if (s->cmap_bm_access) {
offset = s->vram_pos;
} else {
offset = posy * width + posx;
}
if (!buf->size) {
qemu_log("write to non-existent buffer\n");
return;
}
p = buf->data;
if (pix_count > size * 8) {
pix_count = size * 8;
}
if (posy * width + posx + pix_count > buf->size) {
qemu_log("write outside bounds: wants %dx%d, max size %dx%d\n",
posx, posy, width, height);
return;
}
switch (pix_length) {
case 0:
if (s->image_bitmap_op & 0x20000000) {
data &= vram_bitmask;
}
for (i = 0; i < pix_count; i++) {
artist_rop8(s, p + offset + pix_count - 1 - i,
(data & 1) ? (s->plane_mask >> 24) : 0);
data >>= 1;
}
memory_region_set_dirty(&buf->mr, offset, pix_count);
break;
case 3:
if (s->cmap_bm_access) {
*(uint32_t *)(p + offset) = data;
break;
}
data8 = (uint8_t *)&data;
for (i = 3; i >= 0; i--) {
if (!(s->image_bitmap_op & 0x20000000) ||
s->vram_bitmask & (1 << (28 + i))) {
artist_rop8(s, p + offset + 3 - i, data8[ROP8OFF(i)]);
}
}
memory_region_set_dirty(&buf->mr, offset, 3);
break;
case 6:
switch (size) {
default:
case 4:
vram_bitmask = s->vram_bitmask;
break;
case 2:
vram_bitmask = s->vram_bitmask >> 16;
break;
case 1:
vram_bitmask = s->vram_bitmask >> 24;
break;
}
for (i = 0; i < pix_count; i++) {
mask = 1 << (pix_count - 1 - i);
if (!(s->image_bitmap_op & 0x20000000) ||
(vram_bitmask & mask)) {
if (data & mask) {
artist_rop8(s, p + offset + i, s->fg_color);
} else {
if (!(s->image_bitmap_op & 0x10000002)) {
artist_rop8(s, p + offset + i, s->bg_color);
}
}
}
}
memory_region_set_dirty(&buf->mr, offset, pix_count);
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unknown pixel length %d\n",
__func__, pix_length);
break;
}
if (incr_x) {
if (s->cmap_bm_access) {
s->vram_pos += 4;
} else {
s->vram_pos += pix_count << 2;
}
}
if (vram_write_bufidx(s) == ARTIST_BUFFER_CURSOR1 ||
vram_write_bufidx(s) == ARTIST_BUFFER_CURSOR2) {
artist_invalidate_cursor(s);
}
}
static void block_move(ARTISTState *s, int source_x, int source_y, int dest_x,
int dest_y, int width, int height)
{
struct vram_buffer *buf;
int line, endline, lineincr, startcolumn, endcolumn, columnincr, column;
uint32_t dst, src;
trace_artist_block_move(source_x, source_y, dest_x, dest_y, width, height);
if (s->control_plane != 0) {
/* We don't support CONTROL_PLANE accesses */
qemu_log_mask(LOG_UNIMP, "%s: CONTROL_PLANE: %08x\n", __func__,
s->control_plane);
return;
}
buf = &s->vram_buffer[ARTIST_BUFFER_AP];
if (dest_y > source_y) {
/* move down */
line = height - 1;
endline = -1;
lineincr = -1;
} else {
/* move up */
line = 0;
endline = height;
lineincr = 1;
}
if (dest_x > source_x) {
/* move right */
startcolumn = width - 1;
endcolumn = -1;
columnincr = -1;
} else {
/* move left */
startcolumn = 0;
endcolumn = width;
columnincr = 1;
}
for ( ; line != endline; line += lineincr) {
src = source_x + ((line + source_y) * buf->width);
dst = dest_x + ((line + dest_y) * buf->width);
for (column = startcolumn; column != endcolumn; column += columnincr) {
if (dst + column > buf->size || src + column > buf->size) {
continue;
}
artist_rop8(s, buf->data + dst + column, buf->data[src + column]);
}
}
artist_invalidate_lines(buf, dest_y, height);
}
static void fill_window(ARTISTState *s, int startx, int starty,
int width, int height)
{
uint32_t offset;
uint8_t color = artist_get_color(s);
struct vram_buffer *buf;
int x, y;
trace_artist_fill_window(startx, starty, width, height,
s->image_bitmap_op, s->control_plane);
if (s->control_plane != 0) {
/* We don't support CONTROL_PLANE accesses */
qemu_log_mask(LOG_UNIMP, "%s: CONTROL_PLANE: %08x\n", __func__,
s->control_plane);
return;
}
if (s->reg_100080 == 0x7d) {
/*
* Not sure what this register really does, but
* 0x7d seems to enable autoincremt of the Y axis
* by the current block move height.
*/
height = artist_get_y(s->blockmove_size);
s->vram_start += height;
}
buf = &s->vram_buffer[ARTIST_BUFFER_AP];
for (y = starty; y < starty + height; y++) {
offset = y * s->width;
for (x = startx; x < startx + width; x++) {
artist_rop8(s, buf->data + offset + x, color);
}
}
artist_invalidate_lines(buf, starty, height);
}
static void draw_line(ARTISTState *s, int x1, int y1, int x2, int y2,
bool update_start, int skip_pix, int max_pix)
{
struct vram_buffer *buf;
uint8_t color;
int dx, dy, t, e, x, y, incy, diago, horiz;
bool c1;
uint8_t *p;
trace_artist_draw_line(x1, y1, x2, y2);
if (update_start) {
s->vram_start = (x2 << 16) | y2;
}
if (x2 > x1) {
dx = x2 - x1;
} else {
dx = x1 - x2;
}
if (y2 > y1) {
dy = y2 - y1;
} else {
dy = y1 - y2;
}
if (!dx || !dy) {
return;
}
c1 = false;
if (dy > dx) {
t = y2;
y2 = x2;
x2 = t;
t = y1;
y1 = x1;
x1 = t;
t = dx;
dx = dy;
dy = t;
c1 = true;
}
if (x1 > x2) {
t = y2;
y2 = y1;
y1 = t;
t = x1;
x1 = x2;
x2 = t;
}
horiz = dy << 1;
diago = (dy - dx) << 1;
e = (dy << 1) - dx;
if (y1 <= y2) {
incy = 1;
} else {
incy = -1;
}
x = x1;
y = y1;
color = artist_get_color(s);
buf = &s->vram_buffer[ARTIST_BUFFER_AP];
do {
if (c1) {
p = buf->data + x * s->width + y;
} else {
p = buf->data + y * s->width + x;
}
if (skip_pix > 0) {
skip_pix--;
} else {
artist_rop8(s, p, color);
}
if (e > 0) {
artist_invalidate_lines(buf, y, 1);
y += incy;
e += diago;
} else {
e += horiz;
}
x++;
} while (x <= x2 && (max_pix == -1 || --max_pix > 0));
}
static void draw_line_pattern_start(ARTISTState *s)
{
int startx = artist_get_x(s->vram_start);
int starty = artist_get_y(s->vram_start);
int endx = artist_get_x(s->blockmove_size);
int endy = artist_get_y(s->blockmove_size);
int pstart = s->line_pattern_start >> 16;
draw_line(s, startx, starty, endx, endy, false, -1, pstart);
s->line_pattern_skip = pstart;
}
static void draw_line_pattern_next(ARTISTState *s)
{
int startx = artist_get_x(s->vram_start);
int starty = artist_get_y(s->vram_start);
int endx = artist_get_x(s->blockmove_size);
int endy = artist_get_y(s->blockmove_size);
int line_xy = s->line_xy >> 16;
draw_line(s, startx, starty, endx, endy, false, s->line_pattern_skip,
s->line_pattern_skip + line_xy);
s->line_pattern_skip += line_xy;
s->image_bitmap_op ^= 2;
}
static void draw_line_size(ARTISTState *s, bool update_start)
{
int startx = artist_get_x(s->vram_start);
int starty = artist_get_y(s->vram_start);
int endx = artist_get_x(s->line_size);
int endy = artist_get_y(s->line_size);
draw_line(s, startx, starty, endx, endy, update_start, -1, -1);
}
static void draw_line_xy(ARTISTState *s, bool update_start)
{
int startx = artist_get_x(s->vram_start);
int starty = artist_get_y(s->vram_start);
int sizex = artist_get_x(s->blockmove_size);
int sizey = artist_get_y(s->blockmove_size);
int linexy = s->line_xy >> 16;
int endx, endy;
endx = startx;
endy = starty;
if (sizex > 0) {
endx = startx + linexy;
}
if (sizex < 0) {
endx = startx;
startx -= linexy;
}
if (sizey > 0) {
endy = starty + linexy;
}
if (sizey < 0) {
endy = starty;
starty -= linexy;
}
if (startx < 0) {
startx = 0;
}
if (endx < 0) {
endx = 0;
}
if (starty < 0) {
starty = 0;
}
if (endy < 0) {
endy = 0;
}
draw_line(s, startx, starty, endx, endy, false, -1, -1);
}
static void draw_line_end(ARTISTState *s, bool update_start)
{
int startx = artist_get_x(s->vram_start);
int starty = artist_get_y(s->vram_start);
int endx = artist_get_x(s->line_end);
int endy = artist_get_y(s->line_end);
draw_line(s, startx, starty, endx, endy, update_start, -1, -1);
}
static void font_write16(ARTISTState *s, uint16_t val)
{
struct vram_buffer *buf;
uint32_t color = (s->image_bitmap_op & 2) ? s->fg_color : s->bg_color;
uint16_t mask;
int i;
int startx = artist_get_x(s->vram_start);
int starty = artist_get_y(s->vram_start) + s->font_write_pos_y;
int offset = starty * s->width + startx;
buf = &s->vram_buffer[ARTIST_BUFFER_AP];
if (offset + 16 > buf->size) {
return;
}
for (i = 0; i < 16; i++) {
mask = 1 << (15 - i);
if (val & mask) {
artist_rop8(s, buf->data + offset + i, color);
} else {
if (!(s->image_bitmap_op & 0x20000000)) {
artist_rop8(s, buf->data + offset + i, s->bg_color);
}
}
}
artist_invalidate_lines(buf, starty, 1);
}
static void font_write(ARTISTState *s, uint32_t val)
{
font_write16(s, val >> 16);
if (++s->font_write_pos_y == artist_get_y(s->blockmove_size)) {
s->vram_start += (s->blockmove_size & 0xffff0000);
return;
}
font_write16(s, val & 0xffff);
if (++s->font_write_pos_y == artist_get_y(s->blockmove_size)) {
s->vram_start += (s->blockmove_size & 0xffff0000);
return;
}
}
static void combine_write_reg(hwaddr addr, uint64_t val, int size, void *out)
{
/*
* FIXME: is there a qemu helper for this?
*/
#ifndef HOST_WORDS_BIGENDIAN
addr ^= 3;
#endif
switch (size) {
case 1:
*(uint8_t *)(out + (addr & 3)) = val;
break;
case 2:
*(uint16_t *)(out + (addr & 2)) = val;
break;
case 4:
*(uint32_t *)out = val;
break;
default:
qemu_log_mask(LOG_UNIMP, "unsupported write size: %d\n", size);
}
}
static void artist_reg_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
ARTISTState *s = opaque;
int posx, posy;
int width, height;
trace_artist_reg_write(size, addr, artist_reg_name(addr & ~3ULL), val);
switch (addr & ~3ULL) {
case 0x100080:
combine_write_reg(addr, val, size, &s->reg_100080);
break;
case FG_COLOR:
combine_write_reg(addr, val, size, &s->fg_color);
break;
case BG_COLOR:
combine_write_reg(addr, val, size, &s->bg_color);
break;
case VRAM_BITMASK:
combine_write_reg(addr, val, size, &s->vram_bitmask);
break;
case VRAM_WRITE_INCR_Y:
posx = (s->vram_pos >> 2) & 0x7ff;
posy = (s->vram_pos >> 13) & 0x3ff;
vram_bit_write(s, posx, posy + s->vram_char_y++, false, size, val);
break;
case VRAM_WRITE_INCR_X:
case VRAM_WRITE_INCR_X2:
posx = (s->vram_pos >> 2) & 0x7ff;
posy = (s->vram_pos >> 13) & 0x3ff;
vram_bit_write(s, posx, posy + s->vram_char_y, true, size, val);
break;
case VRAM_IDX:
combine_write_reg(addr, val, size, &s->vram_pos);
s->vram_char_y = 0;
s->draw_line_pattern = 0;
break;
case VRAM_START:
combine_write_reg(addr, val, size, &s->vram_start);
s->draw_line_pattern = 0;
break;
case VRAM_START_TRIGGER:
combine_write_reg(addr, val, size, &s->vram_start);
fill_window(s, artist_get_x(s->vram_start),
artist_get_y(s->vram_start),
artist_get_x(s->blockmove_size),
artist_get_y(s->blockmove_size));
break;
case VRAM_SIZE_TRIGGER:
combine_write_reg(addr, val, size, &s->vram_size);
if (size == 2 && !(addr & 2)) {
height = artist_get_y(s->blockmove_size);
} else {
height = artist_get_y(s->vram_size);
}
if (size == 2 && (addr & 2)) {
width = artist_get_x(s->blockmove_size);
} else {
width = artist_get_x(s->vram_size);
}
fill_window(s, artist_get_x(s->vram_start),
artist_get_y(s->vram_start),
width, height);
break;
case LINE_XY:
combine_write_reg(addr, val, size, &s->line_xy);
if (s->draw_line_pattern) {
draw_line_pattern_next(s);
} else {
draw_line_xy(s, true);
}
break;
case PATTERN_LINE_START:
combine_write_reg(addr, val, size, &s->line_pattern_start);
s->draw_line_pattern = 1;
draw_line_pattern_start(s);
break;
case LINE_SIZE:
combine_write_reg(addr, val, size, &s->line_size);
draw_line_size(s, true);
break;
case LINE_END:
combine_write_reg(addr, val, size, &s->line_end);
draw_line_end(s, true);
break;
case BLOCK_MOVE_SIZE:
combine_write_reg(addr, val, size, &s->blockmove_size);
break;
case BLOCK_MOVE_SOURCE:
combine_write_reg(addr, val, size, &s->blockmove_source);
break;
case BLOCK_MOVE_DEST_TRIGGER:
combine_write_reg(addr, val, size, &s->blockmove_dest);
block_move(s, artist_get_x(s->blockmove_source),
artist_get_y(s->blockmove_source),
artist_get_x(s->blockmove_dest),
artist_get_y(s->blockmove_dest),
artist_get_x(s->blockmove_size),
artist_get_y(s->blockmove_size));
break;
case BLOCK_MOVE_SIZE_TRIGGER:
combine_write_reg(addr, val, size, &s->blockmove_size);
block_move(s,
artist_get_x(s->blockmove_source),
artist_get_y(s->blockmove_source),
artist_get_x(s->vram_start),
artist_get_y(s->vram_start),
artist_get_x(s->blockmove_size),
artist_get_y(s->blockmove_size));
break;
case PLANE_MASK:
combine_write_reg(addr, val, size, &s->plane_mask);
break;
case CMAP_BM_ACCESS:
combine_write_reg(addr, val, size, &s->cmap_bm_access);
break;
case DST_BM_ACCESS:
combine_write_reg(addr, val, size, &s->dst_bm_access);
s->cmap_bm_access = 0;
break;
case SRC_BM_ACCESS:
combine_write_reg(addr, val, size, &s->src_bm_access);
s->cmap_bm_access = 0;
break;
case CONTROL_PLANE:
combine_write_reg(addr, val, size, &s->control_plane);
break;
case TRANSFER_DATA:
combine_write_reg(addr, val, size, &s->transfer_data);
break;
case 0x300200:
combine_write_reg(addr, val, size, &s->reg_300200);
break;
case 0x300208:
combine_write_reg(addr, val, size, &s->reg_300208);
break;
case 0x300218:
combine_write_reg(addr, val, size, &s->reg_300218);
break;
case CURSOR_POS:
artist_invalidate_cursor(s);
combine_write_reg(addr, val, size, &s->cursor_pos);
artist_invalidate_cursor(s);
break;
case CURSOR_CTRL:
break;
case IMAGE_BITMAP_OP:
combine_write_reg(addr, val, size, &s->image_bitmap_op);
break;
case FONT_WRITE_INCR_Y:
combine_write_reg(addr, val, size, &s->font_write1);
font_write(s, s->font_write1);
break;
case FONT_WRITE_START:
combine_write_reg(addr, val, size, &s->font_write2);
s->font_write_pos_y = 0;
font_write(s, s->font_write2);
break;
case 300104:
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unknown register: reg=%08" HWADDR_PRIx
" val=%08" PRIx64 " size=%d\n",
__func__, addr, val, size);
break;
}
}
static uint64_t combine_read_reg(hwaddr addr, int size, void *in)
{
/*
* FIXME: is there a qemu helper for this?
*/
#ifndef HOST_WORDS_BIGENDIAN
addr ^= 3;
#endif
switch (size) {
case 1:
return *(uint8_t *)(in + (addr & 3));
case 2:
return *(uint16_t *)(in + (addr & 2));
case 4:
return *(uint32_t *)in;
default:
qemu_log_mask(LOG_UNIMP, "unsupported read size: %d\n", size);
return 0;
}
}
static uint64_t artist_reg_read(void *opaque, hwaddr addr, unsigned size)
{
ARTISTState *s = opaque;
uint32_t val = 0;
switch (addr & ~3ULL) {
/* Unknown status registers */
case 0:
break;
case 0x211110:
val = (s->width << 16) | s->height;
if (s->depth == 1) {
val |= 1 << 31;
}
break;
case 0x100000:
case 0x300000:
case 0x300004:
case 0x300308:
case 0x380000:
break;
case 0x300008:
case 0x380008:
/*
* FIFO ready flag. we're not emulating the FIFOs
* so we're always ready
*/
val = 0x10;
break;
case 0x300200:
val = s->reg_300200;
break;
case 0x300208:
val = s->reg_300208;
break;
case 0x300218:
val = s->reg_300218;
break;
case 0x30023c:
val = 0xac4ffdac;
break;
case 0x380004:
/* 0x02000000 Buserror */
val = 0x6dc20006;
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unknown register: %08" HWADDR_PRIx
" size %d\n", __func__, addr, size);
break;
}
val = combine_read_reg(addr, size, &val);
trace_artist_reg_read(size, addr, artist_reg_name(addr & ~3ULL), val);
return val;
}
static void artist_vram_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
ARTISTState *s = opaque;
struct vram_buffer *buf;
int posy = (addr >> 11) & 0x3ff;
int posx = addr & 0x7ff;
uint32_t offset;
trace_artist_vram_write(size, addr, val);
if (s->cmap_bm_access) {
buf = &s->vram_buffer[ARTIST_BUFFER_CMAP];
if (addr + 3 < buf->size) {
*(uint32_t *)(buf->data + addr) = val;
}
return;
}
buf = vram_write_buffer(s);
if (!buf->size) {
return;
}
if (posy > buf->height || posx > buf->width) {
return;
}
offset = posy * buf->width + posx;
switch (size) {
case 4:
*(uint32_t *)(buf->data + offset) = be32_to_cpu(val);
memory_region_set_dirty(&buf->mr, offset, 4);
break;
case 2:
*(uint16_t *)(buf->data + offset) = be16_to_cpu(val);
memory_region_set_dirty(&buf->mr, offset, 2);
break;
case 1:
*(uint8_t *)(buf->data + offset) = val;
memory_region_set_dirty(&buf->mr, offset, 1);
break;
default:
break;
}
}
static uint64_t artist_vram_read(void *opaque, hwaddr addr, unsigned size)
{
ARTISTState *s = opaque;
struct vram_buffer *buf;
uint64_t val;
int posy, posx;
if (s->cmap_bm_access) {
buf = &s->vram_buffer[ARTIST_BUFFER_CMAP];
val = *(uint32_t *)(buf->data + addr);
trace_artist_vram_read(size, addr, 0, 0, val);
return 0;
}
buf = vram_read_buffer(s);
if (!buf->size) {
return 0;
}
posy = (addr >> 13) & 0x3ff;
posx = (addr >> 2) & 0x7ff;
if (posy > buf->height || posx > buf->width) {
return 0;
}
val = cpu_to_be32(*(uint32_t *)(buf->data + posy * buf->width + posx));
trace_artist_vram_read(size, addr, posx, posy, val);
return val;
}
static const MemoryRegionOps artist_reg_ops = {
.read = artist_reg_read,
.write = artist_reg_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 4,
},
};
static const MemoryRegionOps artist_vram_ops = {
.read = artist_vram_read,
.write = artist_vram_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 4,
},
};
static void artist_draw_cursor(ARTISTState *s)
{
DisplaySurface *surface = qemu_console_surface(s->con);
uint32_t *data = (uint32_t *)surface_data(surface);
struct vram_buffer *cursor0, *cursor1 , *buf;
int cx, cy, cursor_pos_x, cursor_pos_y;
cursor0 = &s->vram_buffer[ARTIST_BUFFER_CURSOR1];
cursor1 = &s->vram_buffer[ARTIST_BUFFER_CURSOR2];
buf = &s->vram_buffer[ARTIST_BUFFER_AP];
artist_get_cursor_pos(s, &cursor_pos_x, &cursor_pos_y);
for (cy = 0; cy < s->cursor_height; cy++) {
for (cx = 0; cx < s->cursor_width; cx++) {
if (cursor_pos_y + cy < 0 ||
cursor_pos_x + cx < 0 ||
cursor_pos_y + cy > buf->height - 1 ||
cursor_pos_x + cx > buf->width) {
continue;
}
int dstoffset = (cursor_pos_y + cy) * s->width +
(cursor_pos_x + cx);
if (cursor0->data[cy * cursor0->width + cx]) {
data[dstoffset] = 0;
} else {
if (cursor1->data[cy * cursor1->width + cx]) {
data[dstoffset] = 0xffffff;
}
}
}
}
}
static void artist_draw_line(void *opaque, uint8_t *d, const uint8_t *src,
int width, int pitch)
{
ARTISTState *s = ARTIST(opaque);
uint32_t *cmap, *data = (uint32_t *)d;
int x;
cmap = (uint32_t *)(s->vram_buffer[ARTIST_BUFFER_CMAP].data + 0x400);
for (x = 0; x < s->width; x++) {
*data++ = cmap[*src++];
}
}
static void artist_update_display(void *opaque)
{
ARTISTState *s = opaque;
DisplaySurface *surface = qemu_console_surface(s->con);
int first = 0, last;
framebuffer_update_display(surface, &s->fbsection, s->width, s->height,
s->width, s->width * 4, 0, 0, artist_draw_line,
s, &first, &last);
artist_draw_cursor(s);
dpy_gfx_update(s->con, 0, 0, s->width, s->height);
}
static void artist_invalidate(void *opaque)
{
ARTISTState *s = ARTIST(opaque);
struct vram_buffer *buf = &s->vram_buffer[ARTIST_BUFFER_AP];
memory_region_set_dirty(&buf->mr, 0, buf->size);
}
static const GraphicHwOps artist_ops = {
.invalidate = artist_invalidate,
.gfx_update = artist_update_display,
};
static void artist_initfn(Object *obj)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
ARTISTState *s = ARTIST(obj);
memory_region_init_io(&s->reg, obj, &artist_reg_ops, s, "artist.reg",
4 * MiB);
memory_region_init_io(&s->vram_mem, obj, &artist_vram_ops, s, "artist.vram",
8 * MiB);
sysbus_init_mmio(sbd, &s->reg);
sysbus_init_mmio(sbd, &s->vram_mem);
}
static void artist_create_buffer(ARTISTState *s, const char *name,
hwaddr *offset, unsigned int idx,
int width, int height)
{
struct vram_buffer *buf = s->vram_buffer + idx;
memory_region_init_ram(&buf->mr, NULL, name, width * height,
&error_fatal);
memory_region_add_subregion_overlap(&s->mem_as_root, *offset, &buf->mr, 0);
buf->data = memory_region_get_ram_ptr(&buf->mr);
buf->size = height * width;
buf->width = width;
buf->height = height;
*offset += buf->size;
}
static void artist_realizefn(DeviceState *dev, Error **errp)
{
ARTISTState *s = ARTIST(dev);
struct vram_buffer *buf;
hwaddr offset = 0;
memory_region_init(&s->mem_as_root, OBJECT(dev), "artist", ~0ull);
address_space_init(&s->as, &s->mem_as_root, "artist");
artist_create_buffer(s, "cmap", &offset, ARTIST_BUFFER_CMAP, 2048, 4);
artist_create_buffer(s, "ap", &offset, ARTIST_BUFFER_AP,
s->width, s->height);
artist_create_buffer(s, "cursor1", &offset, ARTIST_BUFFER_CURSOR1, 64, 64);
artist_create_buffer(s, "cursor2", &offset, ARTIST_BUFFER_CURSOR2, 64, 64);
artist_create_buffer(s, "attribute", &offset, ARTIST_BUFFER_ATTRIBUTE,
64, 64);
buf = &s->vram_buffer[ARTIST_BUFFER_AP];
framebuffer_update_memory_section(&s->fbsection, &buf->mr, 0,
buf->width, buf->height);
/*
* no idea whether the cursor is fixed size or not, so assume 32x32 which
* seems sufficient for HP-UX X11.
*/
s->cursor_height = 32;
s->cursor_width = 32;
s->con = graphic_console_init(DEVICE(dev), 0, &artist_ops, s);
qemu_console_resize(s->con, s->width, s->height);
}
static int vmstate_artist_post_load(void *opaque, int version_id)
{
artist_invalidate(opaque);
return 0;
}
static const VMStateDescription vmstate_artist = {
.name = "artist",
.version_id = 1,
.minimum_version_id = 1,
.post_load = vmstate_artist_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT16(height, ARTISTState),
VMSTATE_UINT16(width, ARTISTState),
VMSTATE_UINT16(depth, ARTISTState),
VMSTATE_UINT32(fg_color, ARTISTState),
VMSTATE_UINT32(bg_color, ARTISTState),
VMSTATE_UINT32(vram_char_y, ARTISTState),
VMSTATE_UINT32(vram_bitmask, ARTISTState),
VMSTATE_UINT32(vram_start, ARTISTState),
VMSTATE_UINT32(vram_pos, ARTISTState),
VMSTATE_UINT32(vram_size, ARTISTState),
VMSTATE_UINT32(blockmove_source, ARTISTState),
VMSTATE_UINT32(blockmove_dest, ARTISTState),
VMSTATE_UINT32(blockmove_size, ARTISTState),
VMSTATE_UINT32(line_size, ARTISTState),
VMSTATE_UINT32(line_end, ARTISTState),
VMSTATE_UINT32(line_xy, ARTISTState),
VMSTATE_UINT32(cursor_pos, ARTISTState),
VMSTATE_UINT32(cursor_height, ARTISTState),
VMSTATE_UINT32(cursor_width, ARTISTState),
VMSTATE_UINT32(plane_mask, ARTISTState),
VMSTATE_UINT32(reg_100080, ARTISTState),
VMSTATE_UINT32(reg_300200, ARTISTState),
VMSTATE_UINT32(reg_300208, ARTISTState),
VMSTATE_UINT32(reg_300218, ARTISTState),
VMSTATE_UINT32(cmap_bm_access, ARTISTState),
VMSTATE_UINT32(dst_bm_access, ARTISTState),
VMSTATE_UINT32(src_bm_access, ARTISTState),
VMSTATE_UINT32(control_plane, ARTISTState),
VMSTATE_UINT32(transfer_data, ARTISTState),
VMSTATE_UINT32(image_bitmap_op, ARTISTState),
VMSTATE_UINT32(font_write1, ARTISTState),
VMSTATE_UINT32(font_write2, ARTISTState),
VMSTATE_UINT32(font_write_pos_y, ARTISTState),
VMSTATE_END_OF_LIST()
}
};
static Property artist_properties[] = {
DEFINE_PROP_UINT16("width", ARTISTState, width, 1280),
DEFINE_PROP_UINT16("height", ARTISTState, height, 1024),
DEFINE_PROP_UINT16("depth", ARTISTState, depth, 8),
DEFINE_PROP_END_OF_LIST(),
};
static void artist_reset(DeviceState *qdev)
{
}
static void artist_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = artist_realizefn;
dc->vmsd = &vmstate_artist;
dc->reset = artist_reset;
device_class_set_props(dc, artist_properties);
}
static const TypeInfo artist_info = {
.name = TYPE_ARTIST,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(ARTISTState),
.instance_init = artist_initfn,
.class_init = artist_class_init,
};
static void artist_register_types(void)
{
type_register_static(&artist_info);
}
type_init(artist_register_types)
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