qemu/hw/display/vga-isa-mm.c

   1 /*
   2  * QEMU ISA MM VGA Emulator.
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "qemu/osdep.h"
  25 #include "hw/hw.h"
  26 #include "ui/console.h"
  27 #include "hw/i386/pc.h"
  28 #include "vga_int.h"
  29 #include "ui/pixel_ops.h"
  30 #include "qemu/timer.h"
  31
  32 #define VGA_RAM_SIZE (8192 * 1024)
  33
  34 typedef struct ISAVGAMMState {
  35     VGACommonState vga;
  36     int it_shift;
  37 } ISAVGAMMState;
  38
  39 /* Memory mapped interface */
  40 static uint32_t vga_mm_readb (void *opaque, hwaddr addr)
  41 {
  42     ISAVGAMMState *s = opaque;
  43
  44     return vga_ioport_read(&s->vga, addr >> s->it_shift) & 0xff;
  45 }
  46
  47 static void vga_mm_writeb (void *opaque,
  48                            hwaddr addr, uint32_t value)
  49 {
  50     ISAVGAMMState *s = opaque;
  51
  52     vga_ioport_write(&s->vga, addr >> s->it_shift, value & 0xff);
  53 }
  54
  55 static uint32_t vga_mm_readw (void *opaque, hwaddr addr)
  56 {
  57     ISAVGAMMState *s = opaque;
  58
  59     return vga_ioport_read(&s->vga, addr >> s->it_shift) & 0xffff;
  60 }
  61
  62 static void vga_mm_writew (void *opaque,
  63                            hwaddr addr, uint32_t value)
  64 {
  65     ISAVGAMMState *s = opaque;
  66
  67     vga_ioport_write(&s->vga, addr >> s->it_shift, value & 0xffff);
  68 }
  69
  70 static uint32_t vga_mm_readl (void *opaque, hwaddr addr)
  71 {
  72     ISAVGAMMState *s = opaque;
  73
  74     return vga_ioport_read(&s->vga, addr >> s->it_shift);
  75 }
  76
  77 static void vga_mm_writel (void *opaque,
  78                            hwaddr addr, uint32_t value)
  79 {
  80     ISAVGAMMState *s = opaque;
  81
  82     vga_ioport_write(&s->vga, addr >> s->it_shift, value);
  83 }
  84
  85 static const MemoryRegionOps vga_mm_ctrl_ops = {
  86     .old_mmio = {
  87         .read = {
  88             vga_mm_readb,
  89             vga_mm_readw,
  90             vga_mm_readl,
  91         },
  92         .write = {
  93             vga_mm_writeb,
  94             vga_mm_writew,
  95             vga_mm_writel,
  96         },
  97     },
  98     .endianness = DEVICE_NATIVE_ENDIAN,
  99 };
 100
 101 static void vga_mm_init(ISAVGAMMState *s, hwaddr vram_base,
 102                         hwaddr ctrl_base, int it_shift,
 103                         MemoryRegion *address_space)
 104 {
 105     MemoryRegion *s_ioport_ctrl, *vga_io_memory;
 106
 107     s->it_shift = it_shift;
 108     s_ioport_ctrl = g_malloc(sizeof(*s_ioport_ctrl));
 109     memory_region_init_io(s_ioport_ctrl, NULL, &vga_mm_ctrl_ops, s,
 110                           "vga-mm-ctrl", 0x100000);
 111     memory_region_set_flush_coalesced(s_ioport_ctrl);
 112
 113     vga_io_memory = g_malloc(sizeof(*vga_io_memory));
 114     /* XXX: endianness? */
 115     memory_region_init_io(vga_io_memory, NULL, &vga_mem_ops, &s->vga,
 116                           "vga-mem", 0x20000);
 117
 118     vmstate_register(NULL, 0, &vmstate_vga_common, s);
 119
 120     memory_region_add_subregion(address_space, ctrl_base, s_ioport_ctrl);
 121     s->vga.bank_offset = 0;
 122     memory_region_add_subregion(address_space,
 123                                 vram_base + 0x000a0000, vga_io_memory);
 124     memory_region_set_coalescing(vga_io_memory);
 125 }
 126
 127 int isa_vga_mm_init(hwaddr vram_base,
 128                     hwaddr ctrl_base, int it_shift,
 129                     MemoryRegion *address_space)
 130 {
 131     ISAVGAMMState *s;
 132
 133     s = g_malloc0(sizeof(*s));
 134
 135     s->vga.vram_size_mb = VGA_RAM_SIZE >> 20;
 136     vga_common_init(&s->vga, NULL, true);
 137     vga_mm_init(s, vram_base, ctrl_base, it_shift, address_space);
 138
 139     s->vga.con = graphic_console_init(NULL, 0, s->vga.hw_ops, s);
 140
 141     vga_init_vbe(&s->vga, NULL, address_space);
 142     return 0;
 143 }