/* * 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.h" #include "console.h" #include "pixel_ops.h" #include "trace.h" #include "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 */ DisplayState *ds; 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) { 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 (ds_get_bits_per_pixel(s->ds)) { 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", ds_get_bits_per_pixel(s->ds)); 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 = ds_get_data(s->ds); 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 + ds_get_linesize(s->ds); 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_update(s->ds, 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 * ds_get_linesize(s->ds); dd = data_display + x * w; } page += G364_PAGE_SIZE; } done: if (page_min != (ram_addr_t)-1) { dpy_update(s->ds, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1); reset_dirty(s, page_min, page_max); } } static void g364fb_draw_blank(G364State *s) { int i, w; uint8_t *d; if (s->blanked) { /* Screen is already blank. No need to redraw it */ return; } w = s->width * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3); d = ds_get_data(s->ds); for (i = 0; i < s->height; i++) { memset(d, 0, w); d += ds_get_linesize(s->ds); } dpy_update(s->ds, 0, 0, s->width, s->height); s->blanked = 1; } static void g364fb_update_display(void *opaque) { G364State *s = opaque; qemu_flush_coalesced_mmio_buffer(); if (s->width == 0 || s->height == 0) return; if (s->width != ds_get_width(s->ds) || s->height != ds_get_height(s->ds)) { qemu_console_resize(s->ds, 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) { int ymin, ymax, start, end; /* invalidate only near the cursor */ ymin = s->cursor_position & 0xfff; ymax = MIN(s->height, ymin + 64); start = ymin * ds_get_linesize(s->ds); end = (ymax + 1) * ds_get_linesize(s->ds); 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->ds = 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 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)