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-rw-r--r--hw/g364fb.c396
-rw-r--r--hw/g364fb_template.h43
2 files changed, 439 insertions, 0 deletions
diff --git a/hw/g364fb.c b/hw/g364fb.c
new file mode 100644
index 0000000000..0dd4ee766c
--- /dev/null
+++ b/hw/g364fb.c
@@ -0,0 +1,396 @@
+/*
+ * QEMU G364 framebuffer Emulator.
+ *
+ * Copyright (c) 2007-2008 Hervé 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include "hw.h"
+#include "console.h"
+#include "pixel_ops.h"
+
+//#define DEBUG_G364
+
+typedef struct G364State {
+ target_phys_addr_t vram_base;
+ unsigned int vram_size;
+ uint8_t *vram_buffer;
+ uint32_t ctla;
+ uint8_t palette[256][3];
+ /* display refresh support */
+ DisplayState *ds;
+ int graphic_mode;
+ uint32_t scr_width, scr_height; /* in pixels */
+ uint32_t last_scr_width, last_scr_height; /* in pixels */
+} G364State;
+
+/*
+ * graphic modes
+ */
+#define BPP 8
+#define PIXEL_WIDTH 8
+#include "g364fb_template.h"
+#undef BPP
+#undef PIXEL_WIDTH
+
+#define BPP 15
+#define PIXEL_WIDTH 16
+#include "g364fb_template.h"
+#undef BPP
+#undef PIXEL_WIDTH
+
+#define BPP 16
+#define PIXEL_WIDTH 16
+#include "g364fb_template.h"
+#undef BPP
+#undef PIXEL_WIDTH
+
+#define BPP 32
+#define PIXEL_WIDTH 32
+#include "g364fb_template.h"
+#undef BPP
+#undef PIXEL_WIDTH
+
+#define REG_DISPLAYX 0x0918
+#define REG_DISPLAYY 0x0940
+
+#define CTLA_FORCE_BLANK 0x400
+
+static void g364fb_draw_graphic(G364State *s, int full_update)
+{
+ if (s->scr_width == 0 || s->scr_height == 0)
+ return;
+ if (s->scr_width != s->last_scr_width
+ || s->scr_height != s->last_scr_height) {
+ s->last_scr_width = s->scr_width;
+ s->last_scr_height = s->scr_height;
+ dpy_resize(s->ds, s->last_scr_width, s->last_scr_height);
+ full_update = 1;
+ }
+
+ switch (s->ds->depth) {
+ case 8:
+ g364fb_draw_graphic8(s, full_update);
+ break;
+ case 15:
+ g364fb_draw_graphic15(s, full_update);
+ break;
+ case 16:
+ g364fb_draw_graphic16(s, full_update);
+ break;
+ case 32:
+ g364fb_draw_graphic32(s, full_update);
+ break;
+ default:
+ printf("g364fb: unknown depth %d\n", s->ds->depth);
+ return;
+ }
+
+ dpy_update(s->ds, 0, 0, s->last_scr_width, s->last_scr_height);
+}
+
+static void g364fb_draw_blank(G364State *s, int full_update)
+{
+ int i, w;
+ uint8_t *d;
+
+ if (!full_update)
+ return;
+ if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
+ return;
+
+ w = s->last_scr_width * ((s->ds->depth + 7) >> 3);
+ d = s->ds->data;
+ for(i = 0; i < s->last_scr_height; i++) {
+ memset(d, 0, w);
+ d += s->ds->linesize;
+ }
+ dpy_update(s->ds, 0, 0,
+ s->last_scr_width, s->last_scr_height);
+}
+
+#define GMODE_GRAPH 0
+#define GMODE_BLANK 1
+
+static void g364fb_update_display(void *opaque)
+{
+ G364State *s = opaque;
+ int full_update, graphic_mode;
+
+ if (s->ctla & CTLA_FORCE_BLANK)
+ graphic_mode = GMODE_BLANK;
+ else
+ graphic_mode = GMODE_GRAPH;
+ full_update = 0;
+ if (graphic_mode != s->graphic_mode) {
+ s->graphic_mode = graphic_mode;
+ full_update = 1;
+ }
+ switch(graphic_mode) {
+ case GMODE_GRAPH:
+ g364fb_draw_graphic(s, full_update);
+ break;
+ case GMODE_BLANK:
+ default:
+ g364fb_draw_blank(s, full_update);
+ break;
+ }
+}
+
+/* force a full display refresh */
+static void g364fb_invalidate_display(void *opaque)
+{
+ G364State *s = opaque;
+ s->graphic_mode = -1; /* force full update */
+}
+
+static void g364fb_reset(void *opaque)
+{
+ G364State *s = opaque;
+
+ memset(s->palette, 0, sizeof(s->palette));
+ s->scr_width = s->scr_height = 0;
+ s->last_scr_width = s->last_scr_height = 0;
+ memset(s->vram_buffer, 0, s->vram_size);
+ s->graphic_mode = -1; /* force full update */
+}
+
+static void g364fb_screen_dump(void *opaque, const char *filename)
+{
+ G364State *s = opaque;
+ int y, x;
+ uint8_t index;
+ uint8_t *data_buffer;
+ FILE *f;
+
+ f = fopen(filename, "wb");
+ if (!f)
+ return;
+
+ data_buffer = s->vram_buffer;
+ fprintf(f, "P6\n%d %d\n%d\n",
+ s->scr_width, s->scr_height, 255);
+ for(y = 0; y < s->scr_height; y++)
+ for(x = 0; x < s->scr_width; x++, data_buffer++) {
+ index = *data_buffer;
+ fputc(s->palette[index][0], f);
+ fputc(s->palette[index][1], f);
+ fputc(s->palette[index][2], f);
+ }
+ fclose(f);
+}
+
+/* called for accesses to io ports */
+static uint32_t g364fb_ctrl_readb(void *opaque, target_phys_addr_t addr)
+{
+ //G364State *s = opaque;
+ uint32_t val;
+
+ addr &= 0xffff;
+
+ switch (addr) {
+ default:
+#ifdef DEBUG_G364
+ printf("g364fb/ctrl: invalid read at [" TARGET_FMT_lx "]\n", addr);
+#endif
+ val = 0;
+ break;
+ }
+
+#ifdef DEBUG_G364
+ printf("g364fb/ctrl: read 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
+#endif
+
+ return val;
+}
+
+static uint32_t g364fb_ctrl_readw(void *opaque, target_phys_addr_t addr)
+{
+ uint32_t v;
+ v = g364fb_ctrl_readb(opaque, addr);
+ v |= g364fb_ctrl_readb(opaque, addr + 1) << 8;
+ return v;
+}
+
+static uint32_t g364fb_ctrl_readl(void *opaque, target_phys_addr_t addr)
+{
+ uint32_t v;
+ v = g364fb_ctrl_readb(opaque, addr);
+ v |= g364fb_ctrl_readb(opaque, addr + 1) << 8;
+ v |= g364fb_ctrl_readb(opaque, addr + 2) << 16;
+ v |= g364fb_ctrl_readb(opaque, addr + 3) << 24;
+ return v;
+}
+
+static void g364fb_ctrl_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ G364State *s = opaque;
+
+ addr &= 0xffff;
+
+#ifdef DEBUG_G364
+ printf("g364fb/ctrl: write 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
+#endif
+
+ if (addr < 0x0800) {
+ /* color palette */
+ int idx = addr >> 3;
+ int c = addr & 7;
+ if (c < 3)
+ s->palette[idx][c] = (uint8_t)val;
+ } else {
+ switch (addr) {
+ case REG_DISPLAYX:
+ s->scr_width = (s->scr_width & 0xfffffc03) | (val << 2);
+ break;
+ case REG_DISPLAYX + 1:
+ s->scr_width = (s->scr_width & 0xfffc03ff) | (val << 10);
+ break;
+ case REG_DISPLAYY:
+ s->scr_height = (s->scr_height & 0xffffff80) | (val >> 1);
+ break;
+ case REG_DISPLAYY + 1:
+ s->scr_height = (s->scr_height & 0xffff801f) | (val << 7);
+ break;
+ default:
+#ifdef DEBUG_G364
+ printf("g364fb/ctrl: invalid write of 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
+#endif
+ break;
+ }
+ }
+}
+
+static void g364fb_ctrl_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ g364fb_ctrl_writeb(opaque, addr, val & 0xff);
+ g364fb_ctrl_writeb(opaque, addr + 1, (val >> 8) & 0xff);
+}
+
+static void g364fb_ctrl_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ g364fb_ctrl_writeb(opaque, addr, val & 0xff);
+ g364fb_ctrl_writeb(opaque, addr + 1, (val >> 8) & 0xff);
+ g364fb_ctrl_writeb(opaque, addr + 2, (val >> 16) & 0xff);
+ g364fb_ctrl_writeb(opaque, addr + 3, (val >> 24) & 0xff);
+}
+
+static CPUReadMemoryFunc *g364fb_ctrl_read[3] = {
+ g364fb_ctrl_readb,
+ g364fb_ctrl_readw,
+ g364fb_ctrl_readl,
+};
+
+static CPUWriteMemoryFunc *g364fb_ctrl_write[3] = {
+ g364fb_ctrl_writeb,
+ g364fb_ctrl_writew,
+ g364fb_ctrl_writel,
+};
+
+/* called for accesses to video ram */
+static uint32_t g364fb_mem_readb(void *opaque, target_phys_addr_t addr)
+{
+ G364State *s = opaque;
+ target_phys_addr_t relative_addr = addr - s->vram_base;
+
+ return s->vram_buffer[relative_addr];
+}
+
+static uint32_t g364fb_mem_readw(void *opaque, target_phys_addr_t addr)
+{
+ uint32_t v;
+ v = g364fb_mem_readb(opaque, addr);
+ v |= g364fb_mem_readb(opaque, addr + 1) << 8;
+ return v;
+}
+
+static uint32_t g364fb_mem_readl(void *opaque, target_phys_addr_t addr)
+{
+ uint32_t v;
+ v = g364fb_mem_readb(opaque, addr);
+ v |= g364fb_mem_readb(opaque, addr + 1) << 8;
+ v |= g364fb_mem_readb(opaque, addr + 2) << 16;
+ v |= g364fb_mem_readb(opaque, addr + 3) << 24;
+ return v;
+}
+
+static void g364fb_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ G364State *s = opaque;
+ target_phys_addr_t relative_addr = addr - s->vram_base;
+
+ s->vram_buffer[relative_addr] = val;
+}
+
+static void g364fb_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ g364fb_mem_writeb(opaque, addr, val & 0xff);
+ g364fb_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
+}
+
+static void g364fb_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ g364fb_mem_writeb(opaque, addr, val & 0xff);
+ g364fb_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
+ g364fb_mem_writeb(opaque, addr + 2, (val >> 16) & 0xff);
+ g364fb_mem_writeb(opaque, addr + 3, (val >> 24) & 0xff);
+}
+
+static CPUReadMemoryFunc *g364fb_mem_read[3] = {
+ g364fb_mem_readb,
+ g364fb_mem_readw,
+ g364fb_mem_readl,
+};
+
+static CPUWriteMemoryFunc *g364fb_mem_write[3] = {
+ g364fb_mem_writeb,
+ g364fb_mem_writew,
+ g364fb_mem_writel,
+};
+
+int g364fb_mm_init(DisplayState *ds,
+ int vram_size, int it_shift,
+ target_phys_addr_t vram_base, target_phys_addr_t ctrl_base)
+{
+ G364State *s;
+ int io_vram, io_ctrl;
+
+ s = qemu_mallocz(sizeof(G364State));
+ if (!s)
+ return -1;
+
+ s->vram_size = vram_size;
+ s->vram_buffer = qemu_mallocz(s->vram_size);
+
+ qemu_register_reset(g364fb_reset, s);
+ g364fb_reset(s);
+
+ s->ds = ds;
+ s->vram_base = vram_base;
+
+ graphic_console_init(ds, g364fb_update_display,
+ g364fb_invalidate_display, g364fb_screen_dump,
+ NULL, s);
+
+ io_vram = cpu_register_io_memory(0, g364fb_mem_read, g364fb_mem_write, s);
+ cpu_register_physical_memory(s->vram_base, vram_size, io_vram);
+
+ io_ctrl = cpu_register_io_memory(0, g364fb_ctrl_read, g364fb_ctrl_write, s);
+ cpu_register_physical_memory(ctrl_base, 0x10000, io_ctrl);
+
+ return 0;
+}
diff --git a/hw/g364fb_template.h b/hw/g364fb_template.h
new file mode 100644
index 0000000000..f16f5e609f
--- /dev/null
+++ b/hw/g364fb_template.h
@@ -0,0 +1,43 @@
+/*
+ * QEMU G364 framebuffer Emulator.
+ *
+ * Copyright (c) 2007 Hervé 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+static void glue(g364fb_draw_graphic, BPP)(G364State *s, int full_update)
+{
+ int i, j;
+ int w_display;
+ uint8_t *data_buffer;
+ uint8_t *data_display, *dd;
+
+ data_buffer = s->vram_buffer;
+ w_display = s->last_scr_width * PIXEL_WIDTH / 8;
+ data_display = s->ds->data;
+ for(i = 0; i < s->last_scr_height; i++) {
+ dd = data_display;
+ for (j = 0; j < s->last_scr_width; j++, dd += PIXEL_WIDTH / 8, data_buffer++) {
+ uint8_t index = *data_buffer;
+ *((glue(glue(uint, PIXEL_WIDTH), _t) *)dd) = glue(rgb_to_pixel, BPP)(
+ s->palette[index][0],
+ s->palette[index][1],
+ s->palette[index][2]);
+ }
+ data_display += s->ds->linesize;
+ }
+}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-12 21:39:58 +0000