LXR 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 "qemu/units.h"
  26#include "hw/hw.h"
  27#include "hw/display/vga.h"
  28#include "vga_int.h"
  29#include "ui/pixel_ops.h"
  30
  31#define VGA_RAM_SIZE (8 * MiB)
  32
  33typedef struct ISAVGAMMState {
  34    VGACommonState vga;
  35    int it_shift;
  36} ISAVGAMMState;
  37
  38/* Memory mapped interface */
  39static uint32_t vga_mm_readb (void *opaque, hwaddr addr)
  40{
  41    ISAVGAMMState *s = opaque;
  42
  43    return vga_ioport_read(&s->vga, addr >> s->it_shift) & 0xff;
  44}
  45
  46static void vga_mm_writeb (void *opaque,
  47                           hwaddr addr, uint32_t value)
  48{
  49    ISAVGAMMState *s = opaque;
  50
  51    vga_ioport_write(&s->vga, addr >> s->it_shift, value & 0xff);
  52}
  53
  54static uint32_t vga_mm_readw (void *opaque, hwaddr addr)
  55{
  56    ISAVGAMMState *s = opaque;
  57
  58    return vga_ioport_read(&s->vga, addr >> s->it_shift) & 0xffff;
  59}
  60
  61static void vga_mm_writew (void *opaque,
  62                           hwaddr addr, uint32_t value)
  63{
  64    ISAVGAMMState *s = opaque;
  65
  66    vga_ioport_write(&s->vga, addr >> s->it_shift, value & 0xffff);
  67}
  68
  69static uint32_t vga_mm_readl (void *opaque, hwaddr addr)
  70{
  71    ISAVGAMMState *s = opaque;
  72
  73    return vga_ioport_read(&s->vga, addr >> s->it_shift);
  74}
  75
  76static void vga_mm_writel (void *opaque,
  77                           hwaddr addr, uint32_t value)
  78{
  79    ISAVGAMMState *s = opaque;
  80
  81    vga_ioport_write(&s->vga, addr >> s->it_shift, value);
  82}
  83
  84static const MemoryRegionOps vga_mm_ctrl_ops = {
  85    .old_mmio = {
  86        .read = {
  87            vga_mm_readb,
  88            vga_mm_readw,
  89            vga_mm_readl,
  90        },
  91        .write = {
  92            vga_mm_writeb,
  93            vga_mm_writew,
  94            vga_mm_writel,
  95        },
  96    },
  97    .endianness = DEVICE_NATIVE_ENDIAN,
  98};
  99
 100static void vga_mm_init(ISAVGAMMState *s, hwaddr vram_base,
 101                        hwaddr ctrl_base, int it_shift,
 102                        MemoryRegion *address_space)
 103{
 104    MemoryRegion *s_ioport_ctrl, *vga_io_memory;
 105
 106    s->it_shift = it_shift;
 107    s_ioport_ctrl = g_malloc(sizeof(*s_ioport_ctrl));
 108    memory_region_init_io(s_ioport_ctrl, NULL, &vga_mm_ctrl_ops, s,
 109                          "vga-mm-ctrl", 0x100000);
 110    memory_region_set_flush_coalesced(s_ioport_ctrl);
 111
 112    vga_io_memory = g_malloc(sizeof(*vga_io_memory));
 113    /* XXX: endianness? */
 114    memory_region_init_io(vga_io_memory, NULL, &vga_mem_ops, &s->vga,
 115                          "vga-mem", 0x20000);
 116
 117    vmstate_register(NULL, 0, &vmstate_vga_common, s);
 118
 119    memory_region_add_subregion(address_space, ctrl_base, s_ioport_ctrl);
 120    s->vga.bank_offset = 0;
 121    memory_region_add_subregion(address_space,
 122                                vram_base + 0x000a0000, vga_io_memory);
 123    memory_region_set_coalescing(vga_io_memory);
 124}
 125
 126int isa_vga_mm_init(hwaddr vram_base,
 127                    hwaddr ctrl_base, int it_shift,
 128                    MemoryRegion *address_space)
 129{
 130    ISAVGAMMState *s;
 131
 132    s = g_malloc0(sizeof(*s));
 133
 134    s->vga.vram_size_mb = VGA_RAM_SIZE / MiB;
 135    s->vga.global_vmstate = true;
 136    vga_common_init(&s->vga, NULL);
 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}
 144