1 files changed, 114 insertions, 0 deletions
diff --git a/hw/display/vga-isa-mm.c b/hw/display/vga-isa-mm.c
new file mode 100644
index 000000000..7321b7a06
--- /dev/null
+++ b/hw/display/vga-isa-mm.c
@@ -0,0 +1,114 @@
+/*
+ * QEMU ISA MM VGA Emulator.
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/bitops.h"
+#include "qemu/units.h"
+#include "migration/vmstate.h"
+#include "hw/display/vga.h"
+#include "vga_int.h"
+#include "ui/pixel_ops.h"
+
+#define VGA_RAM_SIZE (8 * MiB)
+
+typedef struct ISAVGAMMState {
+    VGACommonState vga;
+    int it_shift;
+} ISAVGAMMState;
+
+/* Memory mapped interface */
+static uint64_t vga_mm_read(void *opaque, hwaddr addr, unsigned size)
+{
+    ISAVGAMMState *s = opaque;
+
+    return vga_ioport_read(&s->vga, addr >> s->it_shift) &
+        MAKE_64BIT_MASK(0, size * 8);
+}
+
+static void vga_mm_write(void *opaque, hwaddr addr, uint64_t value,
+                         unsigned size)
+{
+    ISAVGAMMState *s = opaque;
+
+    vga_ioport_write(&s->vga, addr >> s->it_shift,
+                     value & MAKE_64BIT_MASK(0, size * 8));
+}
+
+static const MemoryRegionOps vga_mm_ctrl_ops = {
+    .read = vga_mm_read,
+    .write = vga_mm_write,
+    .valid.min_access_size = 1,
+    .valid.max_access_size = 4,
+    .impl.min_access_size = 1,
+    .impl.max_access_size = 4,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void vga_mm_init(ISAVGAMMState *s, hwaddr vram_base,
+                        hwaddr ctrl_base, int it_shift,
+                        MemoryRegion *address_space)
+{
+    MemoryRegion *s_ioport_ctrl, *vga_io_memory;
+
+    s->it_shift = it_shift;
+    s_ioport_ctrl = g_malloc(sizeof(*s_ioport_ctrl));
+    memory_region_init_io(s_ioport_ctrl, NULL, &vga_mm_ctrl_ops, s,
+                          "vga-mm-ctrl", 0x100000);
+    memory_region_set_flush_coalesced(s_ioport_ctrl);
+
+    vga_io_memory = g_malloc(sizeof(*vga_io_memory));
+    /* XXX: endianness? */
+    memory_region_init_io(vga_io_memory, NULL, &vga_mem_ops, &s->vga,
+                          "vga-mem", 0x20000);
+
+    vmstate_register(NULL, 0, &vmstate_vga_common, s);
+
+    memory_region_add_subregion(address_space, ctrl_base, s_ioport_ctrl);
+    s->vga.bank_offset = 0;
+    memory_region_add_subregion(address_space,
+                                vram_base + 0x000a0000, vga_io_memory);
+    memory_region_set_coalescing(vga_io_memory);
+}
+
+int isa_vga_mm_init(hwaddr vram_base,
+                    hwaddr ctrl_base, int it_shift,
+                    MemoryRegion *address_space)
+{
+    ISAVGAMMState *s;
+
+    s = g_malloc0(sizeof(*s));
+
+    s->vga.vram_size_mb = VGA_RAM_SIZE / MiB;
+    s->vga.global_vmstate = true;
+    vga_common_init(&s->vga, NULL);
+    vga_mm_init(s, vram_base, ctrl_base, it_shift, address_space);
+
+    s->vga.con = graphic_console_init(NULL, 0, s->vga.hw_ops, s);
+
+    memory_region_add_subregion(address_space,
+                                VBE_DISPI_LFB_PHYSICAL_ADDRESS,
+                                &s->vga.vram);
+
+    return 0;
+}