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-rw-r--r--hw/display/g364fb.c617
1 files changed, 617 insertions, 0 deletions
diff --git a/hw/display/g364fb.c b/hw/display/g364fb.c
new file mode 100644
index 0000000000..f7014e9dd8
--- /dev/null
+++ b/hw/display/g364fb.c
@@ -0,0 +1,617 @@
+/*
+ * QEMU G364 framebuffer Emulator.
+ *
+ * Copyright (c) 2007-2011 Herve Poussineau
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw/hw.h"
+#include "ui/console.h"
+#include "ui/pixel_ops.h"
+#include "trace.h"
+#include "hw/sysbus.h"
+
+typedef struct G364State {
+ /* hardware */
+ uint8_t *vram;
+ uint32_t vram_size;
+ qemu_irq irq;
+ MemoryRegion mem_vram;
+ MemoryRegion mem_ctrl;
+ /* registers */
+ uint8_t color_palette[256][3];
+ uint8_t cursor_palette[3][3];
+ uint16_t cursor[512];
+ uint32_t cursor_position;
+ uint32_t ctla;
+ uint32_t top_of_screen;
+ uint32_t width, height; /* in pixels */
+ /* display refresh support */
+ QemuConsole *con;
+ int depth;
+ int blanked;
+} G364State;
+
+#define REG_BOOT 0x000000
+#define REG_DISPLAY 0x000118
+#define REG_VDISPLAY 0x000150
+#define REG_CTLA 0x000300
+#define REG_TOP 0x000400
+#define REG_CURS_PAL 0x000508
+#define REG_CURS_POS 0x000638
+#define REG_CLR_PAL 0x000800
+#define REG_CURS_PAT 0x001000
+#define REG_RESET 0x100000
+
+#define CTLA_FORCE_BLANK 0x00000400
+#define CTLA_NO_CURSOR 0x00800000
+
+#define G364_PAGE_SIZE 4096
+
+static inline int check_dirty(G364State *s, ram_addr_t page)
+{
+ return memory_region_get_dirty(&s->mem_vram, page, G364_PAGE_SIZE,
+ DIRTY_MEMORY_VGA);
+}
+
+static inline void reset_dirty(G364State *s,
+ ram_addr_t page_min, ram_addr_t page_max)
+{
+ memory_region_reset_dirty(&s->mem_vram,
+ page_min,
+ page_max + G364_PAGE_SIZE - page_min - 1,
+ DIRTY_MEMORY_VGA);
+}
+
+static void g364fb_draw_graphic8(G364State *s)
+{
+ DisplaySurface *surface = qemu_console_surface(s->con);
+ int i, w;
+ uint8_t *vram;
+ uint8_t *data_display, *dd;
+ ram_addr_t page, page_min, page_max;
+ int x, y;
+ int xmin, xmax;
+ int ymin, ymax;
+ int xcursor, ycursor;
+ unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned int b);
+
+ switch (surface_bits_per_pixel(surface)) {
+ case 8:
+ rgb_to_pixel = rgb_to_pixel8;
+ w = 1;
+ break;
+ case 15:
+ rgb_to_pixel = rgb_to_pixel15;
+ w = 2;
+ break;
+ case 16:
+ rgb_to_pixel = rgb_to_pixel16;
+ w = 2;
+ break;
+ case 32:
+ rgb_to_pixel = rgb_to_pixel32;
+ w = 4;
+ break;
+ default:
+ hw_error("g364: unknown host depth %d",
+ surface_bits_per_pixel(surface));
+ return;
+ }
+
+ page = 0;
+ page_min = (ram_addr_t)-1;
+ page_max = 0;
+
+ x = y = 0;
+ xmin = s->width;
+ xmax = 0;
+ ymin = s->height;
+ ymax = 0;
+
+ if (!(s->ctla & CTLA_NO_CURSOR)) {
+ xcursor = s->cursor_position >> 12;
+ ycursor = s->cursor_position & 0xfff;
+ } else {
+ xcursor = ycursor = -65;
+ }
+
+ vram = s->vram + s->top_of_screen;
+ /* XXX: out of range in vram? */
+ data_display = dd = surface_data(surface);
+ while (y < s->height) {
+ if (check_dirty(s, page)) {
+ if (y < ymin)
+ ymin = ymax = y;
+ if (page_min == (ram_addr_t)-1)
+ page_min = page;
+ page_max = page;
+ if (x < xmin)
+ xmin = x;
+ for (i = 0; i < G364_PAGE_SIZE; i++) {
+ uint8_t index;
+ unsigned int color;
+ if (unlikely((y >= ycursor && y < ycursor + 64) &&
+ (x >= xcursor && x < xcursor + 64))) {
+ /* pointer area */
+ int xdiff = x - xcursor;
+ uint16_t curs = s->cursor[(y - ycursor) * 8 + xdiff / 8];
+ int op = (curs >> ((xdiff & 7) * 2)) & 3;
+ if (likely(op == 0)) {
+ /* transparent */
+ index = *vram;
+ color = (*rgb_to_pixel)(
+ s->color_palette[index][0],
+ s->color_palette[index][1],
+ s->color_palette[index][2]);
+ } else {
+ /* get cursor color */
+ index = op - 1;
+ color = (*rgb_to_pixel)(
+ s->cursor_palette[index][0],
+ s->cursor_palette[index][1],
+ s->cursor_palette[index][2]);
+ }
+ } else {
+ /* normal area */
+ index = *vram;
+ color = (*rgb_to_pixel)(
+ s->color_palette[index][0],
+ s->color_palette[index][1],
+ s->color_palette[index][2]);
+ }
+ memcpy(dd, &color, w);
+ dd += w;
+ x++;
+ vram++;
+ if (x == s->width) {
+ xmax = s->width - 1;
+ y++;
+ if (y == s->height) {
+ ymax = s->height - 1;
+ goto done;
+ }
+ data_display = dd = data_display + surface_stride(surface);
+ xmin = 0;
+ x = 0;
+ }
+ }
+ if (x > xmax)
+ xmax = x;
+ if (y > ymax)
+ ymax = y;
+ } else {
+ int dy;
+ if (page_min != (ram_addr_t)-1) {
+ reset_dirty(s, page_min, page_max);
+ page_min = (ram_addr_t)-1;
+ page_max = 0;
+ dpy_gfx_update(s->con, xmin, ymin,
+ xmax - xmin + 1, ymax - ymin + 1);
+ xmin = s->width;
+ xmax = 0;
+ ymin = s->height;
+ ymax = 0;
+ }
+ x += G364_PAGE_SIZE;
+ dy = x / s->width;
+ x = x % s->width;
+ y += dy;
+ vram += G364_PAGE_SIZE;
+ data_display += dy * surface_stride(surface);
+ dd = data_display + x * w;
+ }
+ page += G364_PAGE_SIZE;
+ }
+
+done:
+ if (page_min != (ram_addr_t)-1) {
+ dpy_gfx_update(s->con, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1);
+ reset_dirty(s, page_min, page_max);
+ }
+}
+
+static void g364fb_draw_blank(G364State *s)
+{
+ DisplaySurface *surface = qemu_console_surface(s->con);
+ int i, w;
+ uint8_t *d;
+
+ if (s->blanked) {
+ /* Screen is already blank. No need to redraw it */
+ return;
+ }
+
+ w = s->width * surface_bytes_per_pixel(surface);
+ d = surface_data(surface);
+ for (i = 0; i < s->height; i++) {
+ memset(d, 0, w);
+ d += surface_stride(surface);
+ }
+
+ dpy_gfx_update(s->con, 0, 0, s->width, s->height);
+ s->blanked = 1;
+}
+
+static void g364fb_update_display(void *opaque)
+{
+ G364State *s = opaque;
+ DisplaySurface *surface = qemu_console_surface(s->con);
+
+ qemu_flush_coalesced_mmio_buffer();
+
+ if (s->width == 0 || s->height == 0)
+ return;
+
+ if (s->width != surface_width(surface) ||
+ s->height != surface_height(surface)) {
+ qemu_console_resize(s->con, s->width, s->height);
+ }
+
+ if (s->ctla & CTLA_FORCE_BLANK) {
+ g364fb_draw_blank(s);
+ } else if (s->depth == 8) {
+ g364fb_draw_graphic8(s);
+ } else {
+ error_report("g364: unknown guest depth %d", s->depth);
+ }
+
+ qemu_irq_raise(s->irq);
+}
+
+static inline void g364fb_invalidate_display(void *opaque)
+{
+ G364State *s = opaque;
+
+ s->blanked = 0;
+ memory_region_set_dirty(&s->mem_vram, 0, s->vram_size);
+}
+
+static void g364fb_reset(G364State *s)
+{
+ qemu_irq_lower(s->irq);
+
+ memset(s->color_palette, 0, sizeof(s->color_palette));
+ memset(s->cursor_palette, 0, sizeof(s->cursor_palette));
+ memset(s->cursor, 0, sizeof(s->cursor));
+ s->cursor_position = 0;
+ s->ctla = 0;
+ s->top_of_screen = 0;
+ s->width = s->height = 0;
+ memset(s->vram, 0, s->vram_size);
+ g364fb_invalidate_display(s);
+}
+
+static void g364fb_screen_dump(void *opaque, const char *filename, bool cswitch,
+ Error **errp)
+{
+ G364State *s = opaque;
+ int ret, y, x;
+ uint8_t index;
+ uint8_t *data_buffer;
+ FILE *f;
+
+ qemu_flush_coalesced_mmio_buffer();
+
+ if (s->depth != 8) {
+ error_setg(errp, "g364: unknown guest depth %d", s->depth);
+ return;
+ }
+
+ f = fopen(filename, "wb");
+ if (!f) {
+ error_setg(errp, "failed to open file '%s': %s", filename,
+ strerror(errno));
+ return;
+ }
+
+ if (s->ctla & CTLA_FORCE_BLANK) {
+ /* blank screen */
+ ret = fprintf(f, "P4\n%d %d\n", s->width, s->height);
+ if (ret < 0) {
+ goto write_err;
+ }
+ for (y = 0; y < s->height; y++)
+ for (x = 0; x < s->width; x++) {
+ ret = fputc(0, f);
+ if (ret == EOF) {
+ goto write_err;
+ }
+ }
+ } else {
+ data_buffer = s->vram + s->top_of_screen;
+ ret = fprintf(f, "P6\n%d %d\n%d\n", s->width, s->height, 255);
+ if (ret < 0) {
+ goto write_err;
+ }
+ for (y = 0; y < s->height; y++)
+ for (x = 0; x < s->width; x++, data_buffer++) {
+ index = *data_buffer;
+ ret = fputc(s->color_palette[index][0], f);
+ if (ret == EOF) {
+ goto write_err;
+ }
+ ret = fputc(s->color_palette[index][1], f);
+ if (ret == EOF) {
+ goto write_err;
+ }
+ ret = fputc(s->color_palette[index][2], f);
+ if (ret == EOF) {
+ goto write_err;
+ }
+ }
+ }
+
+out:
+ fclose(f);
+ return;
+
+write_err:
+ error_setg(errp, "failed to write to file '%s': %s", filename,
+ strerror(errno));
+ unlink(filename);
+ goto out;
+}
+
+/* called for accesses to io ports */
+static uint64_t g364fb_ctrl_read(void *opaque,
+ hwaddr addr,
+ unsigned int size)
+{
+ G364State *s = opaque;
+ uint32_t val;
+
+ if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
+ /* cursor pattern */
+ int idx = (addr - REG_CURS_PAT) >> 3;
+ val = s->cursor[idx];
+ } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
+ /* cursor palette */
+ int idx = (addr - REG_CURS_PAL) >> 3;
+ val = ((uint32_t)s->cursor_palette[idx][0] << 16);
+ val |= ((uint32_t)s->cursor_palette[idx][1] << 8);
+ val |= ((uint32_t)s->cursor_palette[idx][2] << 0);
+ } else {
+ switch (addr) {
+ case REG_DISPLAY:
+ val = s->width / 4;
+ break;
+ case REG_VDISPLAY:
+ val = s->height * 2;
+ break;
+ case REG_CTLA:
+ val = s->ctla;
+ break;
+ default:
+ {
+ error_report("g364: invalid read at [" TARGET_FMT_plx "]",
+ addr);
+ val = 0;
+ break;
+ }
+ }
+ }
+
+ trace_g364fb_read(addr, val);
+
+ return val;
+}
+
+static void g364fb_update_depth(G364State *s)
+{
+ static const int depths[8] = { 1, 2, 4, 8, 15, 16, 0 };
+ s->depth = depths[(s->ctla & 0x00700000) >> 20];
+}
+
+static void g364_invalidate_cursor_position(G364State *s)
+{
+ DisplaySurface *surface = qemu_console_surface(s->con);
+ int ymin, ymax, start, end;
+
+ /* invalidate only near the cursor */
+ ymin = s->cursor_position & 0xfff;
+ ymax = MIN(s->height, ymin + 64);
+ start = ymin * surface_stride(surface);
+ end = (ymax + 1) * surface_stride(surface);
+
+ memory_region_set_dirty(&s->mem_vram, start, end - start);
+}
+
+static void g364fb_ctrl_write(void *opaque,
+ hwaddr addr,
+ uint64_t val,
+ unsigned int size)
+{
+ G364State *s = opaque;
+
+ trace_g364fb_write(addr, val);
+
+ if (addr >= REG_CLR_PAL && addr < REG_CLR_PAL + 0x800) {
+ /* color palette */
+ int idx = (addr - REG_CLR_PAL) >> 3;
+ s->color_palette[idx][0] = (val >> 16) & 0xff;
+ s->color_palette[idx][1] = (val >> 8) & 0xff;
+ s->color_palette[idx][2] = val & 0xff;
+ g364fb_invalidate_display(s);
+ } else if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
+ /* cursor pattern */
+ int idx = (addr - REG_CURS_PAT) >> 3;
+ s->cursor[idx] = val;
+ g364fb_invalidate_display(s);
+ } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
+ /* cursor palette */
+ int idx = (addr - REG_CURS_PAL) >> 3;
+ s->cursor_palette[idx][0] = (val >> 16) & 0xff;
+ s->cursor_palette[idx][1] = (val >> 8) & 0xff;
+ s->cursor_palette[idx][2] = val & 0xff;
+ g364fb_invalidate_display(s);
+ } else {
+ switch (addr) {
+ case REG_BOOT: /* Boot timing */
+ case 0x00108: /* Line timing: half sync */
+ case 0x00110: /* Line timing: back porch */
+ case 0x00120: /* Line timing: short display */
+ case 0x00128: /* Frame timing: broad pulse */
+ case 0x00130: /* Frame timing: v sync */
+ case 0x00138: /* Frame timing: v preequalise */
+ case 0x00140: /* Frame timing: v postequalise */
+ case 0x00148: /* Frame timing: v blank */
+ case 0x00158: /* Line timing: line time */
+ case 0x00160: /* Frame store: line start */
+ case 0x00168: /* vram cycle: mem init */
+ case 0x00170: /* vram cycle: transfer delay */
+ case 0x00200: /* vram cycle: mask register */
+ /* ignore */
+ break;
+ case REG_TOP:
+ s->top_of_screen = val;
+ g364fb_invalidate_display(s);
+ break;
+ case REG_DISPLAY:
+ s->width = val * 4;
+ break;
+ case REG_VDISPLAY:
+ s->height = val / 2;
+ break;
+ case REG_CTLA:
+ s->ctla = val;
+ g364fb_update_depth(s);
+ g364fb_invalidate_display(s);
+ break;
+ case REG_CURS_POS:
+ g364_invalidate_cursor_position(s);
+ s->cursor_position = val;
+ g364_invalidate_cursor_position(s);
+ break;
+ case REG_RESET:
+ g364fb_reset(s);
+ break;
+ default:
+ error_report("g364: invalid write of 0x%" PRIx64
+ " at [" TARGET_FMT_plx "]", val, addr);
+ break;
+ }
+ }
+ qemu_irq_lower(s->irq);
+}
+
+static const MemoryRegionOps g364fb_ctrl_ops = {
+ .read = g364fb_ctrl_read,
+ .write = g364fb_ctrl_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .impl.min_access_size = 4,
+ .impl.max_access_size = 4,
+};
+
+static int g364fb_post_load(void *opaque, int version_id)
+{
+ G364State *s = opaque;
+
+ /* force refresh */
+ g364fb_update_depth(s);
+ g364fb_invalidate_display(s);
+
+ return 0;
+}
+
+static const VMStateDescription vmstate_g364fb = {
+ .name = "g364fb",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .post_load = g364fb_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_VBUFFER_UINT32(vram, G364State, 1, NULL, 0, vram_size),
+ VMSTATE_BUFFER_UNSAFE(color_palette, G364State, 0, 256 * 3),
+ VMSTATE_BUFFER_UNSAFE(cursor_palette, G364State, 0, 9),
+ VMSTATE_UINT16_ARRAY(cursor, G364State, 512),
+ VMSTATE_UINT32(cursor_position, G364State),
+ VMSTATE_UINT32(ctla, G364State),
+ VMSTATE_UINT32(top_of_screen, G364State),
+ VMSTATE_UINT32(width, G364State),
+ VMSTATE_UINT32(height, G364State),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void g364fb_init(DeviceState *dev, G364State *s)
+{
+ s->vram = g_malloc0(s->vram_size);
+
+ s->con = graphic_console_init(g364fb_update_display,
+ g364fb_invalidate_display,
+ g364fb_screen_dump, NULL, s);
+
+ memory_region_init_io(&s->mem_ctrl, &g364fb_ctrl_ops, s, "ctrl", 0x180000);
+ memory_region_init_ram_ptr(&s->mem_vram, "vram",
+ s->vram_size, s->vram);
+ vmstate_register_ram(&s->mem_vram, dev);
+ memory_region_set_coalescing(&s->mem_vram);
+}
+
+typedef struct {
+ SysBusDevice busdev;
+ G364State g364;
+} G364SysBusState;
+
+static int g364fb_sysbus_init(SysBusDevice *dev)
+{
+ G364State *s = &FROM_SYSBUS(G364SysBusState, dev)->g364;
+
+ g364fb_init(&dev->qdev, s);
+ sysbus_init_irq(dev, &s->irq);
+ sysbus_init_mmio(dev, &s->mem_ctrl);
+ sysbus_init_mmio(dev, &s->mem_vram);
+
+ return 0;
+}
+
+static void g364fb_sysbus_reset(DeviceState *d)
+{
+ G364SysBusState *s = DO_UPCAST(G364SysBusState, busdev.qdev, d);
+ g364fb_reset(&s->g364);
+}
+
+static Property g364fb_sysbus_properties[] = {
+ DEFINE_PROP_HEX32("vram_size", G364SysBusState, g364.vram_size,
+ 8 * 1024 * 1024),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void g364fb_sysbus_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+ k->init = g364fb_sysbus_init;
+ dc->desc = "G364 framebuffer";
+ dc->reset = g364fb_sysbus_reset;
+ dc->vmsd = &vmstate_g364fb;
+ dc->props = g364fb_sysbus_properties;
+}
+
+static const TypeInfo g364fb_sysbus_info = {
+ .name = "sysbus-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)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-04 17:57:07 +0000