mirror of https://gitee.com/openkylin/qemu.git
546 lines
16 KiB
C
546 lines
16 KiB
C
/*
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* QEMU G364 framebuffer Emulator.
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*
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* Copyright (c) 2007-2011 Herve Poussineau
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/units.h"
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#include "hw/hw.h"
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#include "hw/irq.h"
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#include "hw/qdev-properties.h"
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#include "qemu/error-report.h"
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#include "qemu/module.h"
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#include "ui/console.h"
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#include "ui/pixel_ops.h"
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#include "trace.h"
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#include "hw/sysbus.h"
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#include "migration/vmstate.h"
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typedef struct G364State {
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/* hardware */
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uint8_t *vram;
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uint32_t vram_size;
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qemu_irq irq;
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MemoryRegion mem_vram;
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MemoryRegion mem_ctrl;
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/* registers */
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uint8_t color_palette[256][3];
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uint8_t cursor_palette[3][3];
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uint16_t cursor[512];
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uint32_t cursor_position;
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uint32_t ctla;
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uint32_t top_of_screen;
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uint32_t width, height; /* in pixels */
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/* display refresh support */
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QemuConsole *con;
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int depth;
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int blanked;
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} G364State;
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#define REG_BOOT 0x000000
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#define REG_DISPLAY 0x000118
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#define REG_VDISPLAY 0x000150
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#define REG_CTLA 0x000300
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#define REG_TOP 0x000400
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#define REG_CURS_PAL 0x000508
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#define REG_CURS_POS 0x000638
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#define REG_CLR_PAL 0x000800
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#define REG_CURS_PAT 0x001000
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#define REG_RESET 0x100000
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#define CTLA_FORCE_BLANK 0x00000400
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#define CTLA_NO_CURSOR 0x00800000
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#define G364_PAGE_SIZE 4096
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static inline int check_dirty(G364State *s, DirtyBitmapSnapshot *snap, ram_addr_t page)
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{
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return memory_region_snapshot_get_dirty(&s->mem_vram, snap, page, G364_PAGE_SIZE);
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}
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static void g364fb_draw_graphic8(G364State *s)
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{
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DisplaySurface *surface = qemu_console_surface(s->con);
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DirtyBitmapSnapshot *snap;
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int i, w;
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uint8_t *vram;
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uint8_t *data_display, *dd;
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ram_addr_t page;
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int x, y;
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int xmin, xmax;
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int ymin, ymax;
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int xcursor, ycursor;
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unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned int b);
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switch (surface_bits_per_pixel(surface)) {
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case 8:
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rgb_to_pixel = rgb_to_pixel8;
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w = 1;
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break;
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case 15:
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rgb_to_pixel = rgb_to_pixel15;
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w = 2;
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break;
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case 16:
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rgb_to_pixel = rgb_to_pixel16;
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w = 2;
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break;
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case 32:
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rgb_to_pixel = rgb_to_pixel32;
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w = 4;
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break;
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default:
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hw_error("g364: unknown host depth %d",
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surface_bits_per_pixel(surface));
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return;
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}
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page = 0;
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x = y = 0;
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xmin = s->width;
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xmax = 0;
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ymin = s->height;
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ymax = 0;
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if (!(s->ctla & CTLA_NO_CURSOR)) {
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xcursor = s->cursor_position >> 12;
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ycursor = s->cursor_position & 0xfff;
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} else {
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xcursor = ycursor = -65;
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}
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vram = s->vram + s->top_of_screen;
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/* XXX: out of range in vram? */
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data_display = dd = surface_data(surface);
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snap = memory_region_snapshot_and_clear_dirty(&s->mem_vram, 0, s->vram_size,
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DIRTY_MEMORY_VGA);
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while (y < s->height) {
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if (check_dirty(s, snap, page)) {
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if (y < ymin)
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ymin = ymax = y;
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if (x < xmin)
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xmin = x;
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for (i = 0; i < G364_PAGE_SIZE; i++) {
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uint8_t index;
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unsigned int color;
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if (unlikely((y >= ycursor && y < ycursor + 64) &&
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(x >= xcursor && x < xcursor + 64))) {
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/* pointer area */
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int xdiff = x - xcursor;
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uint16_t curs = s->cursor[(y - ycursor) * 8 + xdiff / 8];
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int op = (curs >> ((xdiff & 7) * 2)) & 3;
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if (likely(op == 0)) {
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/* transparent */
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index = *vram;
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color = (*rgb_to_pixel)(
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s->color_palette[index][0],
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s->color_palette[index][1],
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s->color_palette[index][2]);
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} else {
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/* get cursor color */
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index = op - 1;
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color = (*rgb_to_pixel)(
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s->cursor_palette[index][0],
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s->cursor_palette[index][1],
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s->cursor_palette[index][2]);
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}
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} else {
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/* normal area */
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index = *vram;
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color = (*rgb_to_pixel)(
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s->color_palette[index][0],
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s->color_palette[index][1],
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s->color_palette[index][2]);
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}
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memcpy(dd, &color, w);
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dd += w;
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x++;
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vram++;
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if (x == s->width) {
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xmax = s->width - 1;
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y++;
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if (y == s->height) {
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ymax = s->height - 1;
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goto done;
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}
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data_display = dd = data_display + surface_stride(surface);
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xmin = 0;
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x = 0;
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}
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}
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if (x > xmax)
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xmax = x;
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if (y > ymax)
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ymax = y;
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} else {
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int dy;
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if (xmax || ymax) {
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dpy_gfx_update(s->con, xmin, ymin,
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xmax - xmin + 1, ymax - ymin + 1);
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xmin = s->width;
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xmax = 0;
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ymin = s->height;
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ymax = 0;
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}
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x += G364_PAGE_SIZE;
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dy = x / s->width;
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x = x % s->width;
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y += dy;
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vram += G364_PAGE_SIZE;
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data_display += dy * surface_stride(surface);
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dd = data_display + x * w;
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}
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page += G364_PAGE_SIZE;
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}
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done:
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if (xmax || ymax) {
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dpy_gfx_update(s->con, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1);
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}
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g_free(snap);
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}
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static void g364fb_draw_blank(G364State *s)
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{
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DisplaySurface *surface = qemu_console_surface(s->con);
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int i, w;
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uint8_t *d;
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if (s->blanked) {
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/* Screen is already blank. No need to redraw it */
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return;
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}
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w = s->width * surface_bytes_per_pixel(surface);
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d = surface_data(surface);
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for (i = 0; i < s->height; i++) {
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memset(d, 0, w);
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d += surface_stride(surface);
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}
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dpy_gfx_update_full(s->con);
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s->blanked = 1;
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}
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static void g364fb_update_display(void *opaque)
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{
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G364State *s = opaque;
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DisplaySurface *surface = qemu_console_surface(s->con);
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qemu_flush_coalesced_mmio_buffer();
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if (s->width == 0 || s->height == 0)
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return;
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if (s->width != surface_width(surface) ||
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s->height != surface_height(surface)) {
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qemu_console_resize(s->con, s->width, s->height);
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}
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if (s->ctla & CTLA_FORCE_BLANK) {
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g364fb_draw_blank(s);
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} else if (s->depth == 8) {
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g364fb_draw_graphic8(s);
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} else {
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error_report("g364: unknown guest depth %d", s->depth);
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}
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qemu_irq_raise(s->irq);
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}
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static inline void g364fb_invalidate_display(void *opaque)
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{
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G364State *s = opaque;
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s->blanked = 0;
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memory_region_set_dirty(&s->mem_vram, 0, s->vram_size);
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}
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static void g364fb_reset(G364State *s)
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{
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qemu_irq_lower(s->irq);
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memset(s->color_palette, 0, sizeof(s->color_palette));
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memset(s->cursor_palette, 0, sizeof(s->cursor_palette));
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memset(s->cursor, 0, sizeof(s->cursor));
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s->cursor_position = 0;
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s->ctla = 0;
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s->top_of_screen = 0;
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s->width = s->height = 0;
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memset(s->vram, 0, s->vram_size);
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g364fb_invalidate_display(s);
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}
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/* called for accesses to io ports */
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static uint64_t g364fb_ctrl_read(void *opaque,
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hwaddr addr,
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unsigned int size)
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{
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G364State *s = opaque;
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uint32_t val;
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if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
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/* cursor pattern */
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int idx = (addr - REG_CURS_PAT) >> 3;
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val = s->cursor[idx];
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} else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
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/* cursor palette */
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int idx = (addr - REG_CURS_PAL) >> 3;
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val = ((uint32_t)s->cursor_palette[idx][0] << 16);
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val |= ((uint32_t)s->cursor_palette[idx][1] << 8);
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val |= ((uint32_t)s->cursor_palette[idx][2] << 0);
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} else {
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switch (addr) {
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case REG_DISPLAY:
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val = s->width / 4;
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break;
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case REG_VDISPLAY:
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val = s->height * 2;
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break;
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case REG_CTLA:
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val = s->ctla;
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break;
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default:
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{
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error_report("g364: invalid read at [" TARGET_FMT_plx "]",
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addr);
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val = 0;
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break;
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}
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}
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}
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trace_g364fb_read(addr, val);
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return val;
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}
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static void g364fb_update_depth(G364State *s)
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{
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static const int depths[8] = { 1, 2, 4, 8, 15, 16, 0 };
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s->depth = depths[(s->ctla & 0x00700000) >> 20];
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}
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static void g364_invalidate_cursor_position(G364State *s)
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{
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DisplaySurface *surface = qemu_console_surface(s->con);
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int ymin, ymax, start, end;
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/* invalidate only near the cursor */
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ymin = s->cursor_position & 0xfff;
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ymax = MIN(s->height, ymin + 64);
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start = ymin * surface_stride(surface);
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end = (ymax + 1) * surface_stride(surface);
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memory_region_set_dirty(&s->mem_vram, start, end - start);
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}
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static void g364fb_ctrl_write(void *opaque,
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hwaddr addr,
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uint64_t val,
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unsigned int size)
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{
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G364State *s = opaque;
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trace_g364fb_write(addr, val);
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if (addr >= REG_CLR_PAL && addr < REG_CLR_PAL + 0x800) {
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/* color palette */
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int idx = (addr - REG_CLR_PAL) >> 3;
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s->color_palette[idx][0] = (val >> 16) & 0xff;
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s->color_palette[idx][1] = (val >> 8) & 0xff;
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s->color_palette[idx][2] = val & 0xff;
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g364fb_invalidate_display(s);
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} else if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
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/* cursor pattern */
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int idx = (addr - REG_CURS_PAT) >> 3;
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s->cursor[idx] = val;
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g364fb_invalidate_display(s);
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} else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
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/* cursor palette */
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int idx = (addr - REG_CURS_PAL) >> 3;
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s->cursor_palette[idx][0] = (val >> 16) & 0xff;
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s->cursor_palette[idx][1] = (val >> 8) & 0xff;
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s->cursor_palette[idx][2] = val & 0xff;
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g364fb_invalidate_display(s);
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} else {
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switch (addr) {
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case REG_BOOT: /* Boot timing */
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case 0x00108: /* Line timing: half sync */
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case 0x00110: /* Line timing: back porch */
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case 0x00120: /* Line timing: short display */
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case 0x00128: /* Frame timing: broad pulse */
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case 0x00130: /* Frame timing: v sync */
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case 0x00138: /* Frame timing: v preequalise */
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case 0x00140: /* Frame timing: v postequalise */
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case 0x00148: /* Frame timing: v blank */
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case 0x00158: /* Line timing: line time */
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case 0x00160: /* Frame store: line start */
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case 0x00168: /* vram cycle: mem init */
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case 0x00170: /* vram cycle: transfer delay */
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case 0x00200: /* vram cycle: mask register */
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/* ignore */
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break;
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case REG_TOP:
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s->top_of_screen = val;
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g364fb_invalidate_display(s);
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break;
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case REG_DISPLAY:
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s->width = val * 4;
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break;
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case REG_VDISPLAY:
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s->height = val / 2;
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break;
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case REG_CTLA:
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s->ctla = val;
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g364fb_update_depth(s);
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g364fb_invalidate_display(s);
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break;
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case REG_CURS_POS:
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g364_invalidate_cursor_position(s);
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s->cursor_position = val;
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g364_invalidate_cursor_position(s);
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break;
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case REG_RESET:
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g364fb_reset(s);
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break;
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default:
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error_report("g364: invalid write of 0x%" PRIx64
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" at [" TARGET_FMT_plx "]", val, addr);
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break;
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}
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}
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qemu_irq_lower(s->irq);
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}
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static const MemoryRegionOps g364fb_ctrl_ops = {
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.read = g364fb_ctrl_read,
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.write = g364fb_ctrl_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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.impl.min_access_size = 4,
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.impl.max_access_size = 4,
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};
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static int g364fb_post_load(void *opaque, int version_id)
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{
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G364State *s = opaque;
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/* force refresh */
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g364fb_update_depth(s);
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g364fb_invalidate_display(s);
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return 0;
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}
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static const VMStateDescription vmstate_g364fb = {
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.name = "g364fb",
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.version_id = 1,
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.minimum_version_id = 1,
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.post_load = g364fb_post_load,
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.fields = (VMStateField[]) {
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VMSTATE_VBUFFER_UINT32(vram, G364State, 1, NULL, vram_size),
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VMSTATE_BUFFER_UNSAFE(color_palette, G364State, 0, 256 * 3),
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VMSTATE_BUFFER_UNSAFE(cursor_palette, G364State, 0, 9),
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VMSTATE_UINT16_ARRAY(cursor, G364State, 512),
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VMSTATE_UINT32(cursor_position, G364State),
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VMSTATE_UINT32(ctla, G364State),
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VMSTATE_UINT32(top_of_screen, G364State),
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VMSTATE_UINT32(width, G364State),
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VMSTATE_UINT32(height, G364State),
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VMSTATE_END_OF_LIST()
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}
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};
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static const GraphicHwOps g364fb_ops = {
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.invalidate = g364fb_invalidate_display,
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.gfx_update = g364fb_update_display,
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};
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static void g364fb_init(DeviceState *dev, G364State *s)
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{
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s->vram = g_malloc0(s->vram_size);
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s->con = graphic_console_init(dev, 0, &g364fb_ops, s);
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memory_region_init_io(&s->mem_ctrl, OBJECT(dev), &g364fb_ctrl_ops, s,
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"ctrl", 0x180000);
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memory_region_init_ram_ptr(&s->mem_vram, NULL, "vram",
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s->vram_size, s->vram);
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vmstate_register_ram(&s->mem_vram, dev);
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memory_region_set_log(&s->mem_vram, true, DIRTY_MEMORY_VGA);
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}
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#define TYPE_G364 "sysbus-g364"
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#define G364(obj) OBJECT_CHECK(G364SysBusState, (obj), TYPE_G364)
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typedef struct {
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SysBusDevice parent_obj;
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G364State g364;
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} G364SysBusState;
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static void g364fb_sysbus_realize(DeviceState *dev, Error **errp)
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{
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G364SysBusState *sbs = G364(dev);
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G364State *s = &sbs->g364;
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SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
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g364fb_init(dev, s);
|
|
sysbus_init_irq(sbd, &s->irq);
|
|
sysbus_init_mmio(sbd, &s->mem_ctrl);
|
|
sysbus_init_mmio(sbd, &s->mem_vram);
|
|
}
|
|
|
|
static void g364fb_sysbus_reset(DeviceState *d)
|
|
{
|
|
G364SysBusState *s = G364(d);
|
|
|
|
g364fb_reset(&s->g364);
|
|
}
|
|
|
|
static Property g364fb_sysbus_properties[] = {
|
|
DEFINE_PROP_UINT32("vram_size", G364SysBusState, g364.vram_size, 8 * MiB),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void g364fb_sysbus_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->realize = g364fb_sysbus_realize;
|
|
set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
|
|
dc->desc = "G364 framebuffer";
|
|
dc->reset = g364fb_sysbus_reset;
|
|
dc->vmsd = &vmstate_g364fb;
|
|
device_class_set_props(dc, g364fb_sysbus_properties);
|
|
}
|
|
|
|
static const TypeInfo g364fb_sysbus_info = {
|
|
.name = TYPE_G364,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(G364SysBusState),
|
|
.class_init = g364fb_sysbus_class_init,
|
|
};
|
|
|
|
static void g364fb_register_types(void)
|
|
{
|
|
type_register_static(&g364fb_sysbus_info);
|
|
}
|
|
|
|
type_init(g364fb_register_types)
|