qemu

FORK: QEMU emulator
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vga-mmio.c (4300B)

      1 /*
      2  * QEMU MMIO 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 
     25 #include "qemu/osdep.h"
     26 #include "qapi/error.h"
     27 #include "hw/sysbus.h"
     28 #include "hw/display/vga.h"
     29 #include "hw/qdev-properties.h"
     30 #include "ui/console.h"
     31 #include "vga_int.h"
     32 
     33 /*
     34  * QEMU interface:
     35  *  + sysbus MMIO region 0: VGA I/O registers
     36  *  + sysbus MMIO region 1: VGA MMIO registers
     37  *  + sysbus MMIO region 2: VGA memory
     38  */
     39 
     40 OBJECT_DECLARE_SIMPLE_TYPE(VGAMmioState, VGA_MMIO)
     41 
     42 struct VGAMmioState {
     43     /*< private >*/
     44     SysBusDevice parent_obj;
     45 
     46     /*< public >*/
     47     VGACommonState vga;
     48     MemoryRegion iomem;
     49     MemoryRegion lowmem;
     50 
     51     uint8_t it_shift;
     52 };
     53 
     54 static uint64_t vga_mm_read(void *opaque, hwaddr addr, unsigned size)
     55 {
     56     VGAMmioState *s = opaque;
     57 
     58     return vga_ioport_read(&s->vga, addr >> s->it_shift) &
     59         MAKE_64BIT_MASK(0, size * 8);
     60 }
     61 
     62 static void vga_mm_write(void *opaque, hwaddr addr, uint64_t value,
     63                          unsigned size)
     64 {
     65     VGAMmioState *s = opaque;
     66 
     67     vga_ioport_write(&s->vga, addr >> s->it_shift,
     68                      value & MAKE_64BIT_MASK(0, size * 8));
     69 }
     70 
     71 static const MemoryRegionOps vga_mm_ctrl_ops = {
     72     .read = vga_mm_read,
     73     .write = vga_mm_write,
     74     .valid.min_access_size = 1,
     75     .valid.max_access_size = 4,
     76     .impl.min_access_size = 1,
     77     .impl.max_access_size = 4,
     78     .endianness = DEVICE_NATIVE_ENDIAN,
     79 };
     80 
     81 static void vga_mmio_reset(DeviceState *dev)
     82 {
     83     VGAMmioState *s = VGA_MMIO(dev);
     84 
     85     vga_common_reset(&s->vga);
     86 }
     87 
     88 static void vga_mmio_realizefn(DeviceState *dev, Error **errp)
     89 {
     90     VGAMmioState *s = VGA_MMIO(dev);
     91     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     92 
     93     memory_region_init_io(&s->iomem, OBJECT(dev), &vga_mm_ctrl_ops, s,
     94                           "vga-mmio", 0x100000);
     95     memory_region_set_flush_coalesced(&s->iomem);
     96     sysbus_init_mmio(sbd, &s->iomem);
     97 
     98     /* XXX: endianness? */
     99     memory_region_init_io(&s->lowmem, OBJECT(dev), &vga_mem_ops, &s->vga,
    100                           "vga-lowmem", 0x20000);
    101     memory_region_set_coalescing(&s->lowmem);
    102     sysbus_init_mmio(sbd, &s->lowmem);
    103 
    104     s->vga.bank_offset = 0;
    105     s->vga.global_vmstate = true;
    106     if (!vga_common_init(&s->vga, OBJECT(dev), errp)) {
    107         return;
    108     }
    109 
    110     sysbus_init_mmio(sbd, &s->vga.vram);
    111     s->vga.con = graphic_console_init(dev, 0, s->vga.hw_ops, &s->vga);
    112 }
    113 
    114 static Property vga_mmio_properties[] = {
    115     DEFINE_PROP_UINT8("it_shift", VGAMmioState, it_shift, 0),
    116     DEFINE_PROP_UINT32("vgamem_mb", VGAMmioState, vga.vram_size_mb, 8),
    117     DEFINE_PROP_END_OF_LIST(),
    118 };
    119 
    120 static void vga_mmio_class_initfn(ObjectClass *klass, void *data)
    121 {
    122     DeviceClass *dc = DEVICE_CLASS(klass);
    123 
    124     dc->realize = vga_mmio_realizefn;
    125     dc->reset = vga_mmio_reset;
    126     dc->vmsd = &vmstate_vga_common;
    127     device_class_set_props(dc, vga_mmio_properties);
    128     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
    129 }
    130 
    131 static const TypeInfo vga_mmio_info = {
    132     .name          = TYPE_VGA_MMIO,
    133     .parent        = TYPE_SYS_BUS_DEVICE,
    134     .instance_size = sizeof(VGAMmioState),
    135     .class_init    = vga_mmio_class_initfn,
    136 };
    137 
    138 static void vga_mmio_register_types(void)
    139 {
    140     type_register_static(&vga_mmio_info);
    141 }
    142 
    143 type_init(vga_mmio_register_types)