hw/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 "hw.h"
  25 #include "console.h"
  26 #include "pc.h"
  27 #include "vga_int.h"
  28 #include "pixel_ops.h"
  29 #include "qemu-timer.h"
  30 #include "exec-memory.h"
  31
  32 typedef struct ISAVGAMMState {
  33     VGACommonState vga;
  34     int it_shift;
  35 } ISAVGAMMState;
  36
  37 /* Memory mapped interface */
  38 static uint32_t vga_mm_readb (void *opaque, target_phys_addr_t addr)
  39 {
  40     ISAVGAMMState *s = opaque;
  41
  42     return vga_ioport_read(&s->vga, addr >> s->it_shift) & 0xff;
  43 }
  44
  45 static void vga_mm_writeb (void *opaque,
  46                            target_phys_addr_t addr, uint32_t value)
  47 {
  48     ISAVGAMMState *s = opaque;
  49
  50     vga_ioport_write(&s->vga, addr >> s->it_shift, value & 0xff);
  51 }
  52
  53 static uint32_t vga_mm_readw (void *opaque, target_phys_addr_t addr)
  54 {
  55     ISAVGAMMState *s = opaque;
  56
  57     return vga_ioport_read(&s->vga, addr >> s->it_shift) & 0xffff;
  58 }
  59
  60 static void vga_mm_writew (void *opaque,
  61                            target_phys_addr_t addr, uint32_t value)
  62 {
  63     ISAVGAMMState *s = opaque;
  64
  65     vga_ioport_write(&s->vga, addr >> s->it_shift, value & 0xffff);
  66 }
  67
  68 static uint32_t vga_mm_readl (void *opaque, target_phys_addr_t addr)
  69 {
  70     ISAVGAMMState *s = opaque;
  71
  72     return vga_ioport_read(&s->vga, addr >> s->it_shift);
  73 }
  74
  75 static void vga_mm_writel (void *opaque,
  76                            target_phys_addr_t addr, uint32_t value)
  77 {
  78     ISAVGAMMState *s = opaque;
  79
  80     vga_ioport_write(&s->vga, addr >> s->it_shift, value);
  81 }
  82
  83 static const MemoryRegionOps vga_mm_ctrl_ops = {
  84     .old_mmio = {
  85         .read = {
  86             vga_mm_readb,
  87             vga_mm_readw,
  88             vga_mm_readl,
  89         },
  90         .write = {
  91             vga_mm_writeb,
  92             vga_mm_writew,
  93             vga_mm_writel,
  94         },
  95     },
  96     .endianness = DEVICE_NATIVE_ENDIAN,
  97 };
  98
  99 static void vga_mm_init(ISAVGAMMState *s, target_phys_addr_t vram_base,
 100                         target_phys_addr_t ctrl_base, int it_shift)
 101 {
 102     MemoryRegion *s_ioport_ctrl, *vga_io_memory;
 103
 104     s->it_shift = it_shift;
 105     s_ioport_ctrl = qemu_malloc(sizeof(*s_ioport_ctrl));
 106     memory_region_init_io(s_ioport_ctrl, &vga_mm_ctrl_ops, s,
 107                           "vga-mm-ctrl", 0x100000);
 108
 109     vga_io_memory = qemu_malloc(sizeof(*vga_io_memory));
 110     /* XXX: endianness? */
 111     memory_region_init_io(vga_io_memory, &vga_mem_ops, &s->vga,
 112                           "vga-mem", 0x20000);
 113
 114     vmstate_register(NULL, 0, &vmstate_vga_common, s);
 115
 116     memory_region_add_subregion(get_system_memory(), ctrl_base, s_ioport_ctrl);
 117     s->vga.bank_offset = 0;
 118     memory_region_add_subregion(get_system_memory(),
 119                                 vram_base + 0x000a0000, vga_io_memory);
 120     memory_region_set_coalescing(vga_io_memory);
 121 }
 122
 123 int isa_vga_mm_init(target_phys_addr_t vram_base,
 124                     target_phys_addr_t ctrl_base, int it_shift)
 125 {
 126     ISAVGAMMState *s;
 127
 128     s = qemu_mallocz(sizeof(*s));
 129
 130     vga_common_init(&s->vga, VGA_RAM_SIZE);
 131     vga_mm_init(s, vram_base, ctrl_base, it_shift);
 132
 133     s->vga.ds = graphic_console_init(s->vga.update, s->vga.invalidate,
 134                                      s->vga.screen_dump, s->vga.text_update, s);
 135
 136     vga_init_vbe(&s->vga);
 137     return 0;
 138 }