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 "qemu/bitops.h" 27 #include "qemu/units.h" 28 #include "migration/vmstate.h" 29 #include "hw/display/vga.h" 30 #include "vga_int.h" 31 #include "ui/pixel_ops.h" 32 33 #define VGA_RAM_SIZE (8 * MiB) 34 35 typedef struct VGAMmioState { 36 VGACommonState vga; 37 int it_shift; 38 } VGAMmioState; 39 40 /* Memory mapped interface */ 41 static uint64_t vga_mm_read(void *opaque, hwaddr addr, unsigned size) 42 { 43 VGAMmioState *s = opaque; 44 45 return vga_ioport_read(&s->vga, addr >> s->it_shift) & 46 MAKE_64BIT_MASK(0, size * 8); 47 } 48 49 static void vga_mm_write(void *opaque, hwaddr addr, uint64_t value, 50 unsigned size) 51 { 52 VGAMmioState *s = opaque; 53 54 vga_ioport_write(&s->vga, addr >> s->it_shift, 55 value & MAKE_64BIT_MASK(0, size * 8)); 56 } 57 58 static const MemoryRegionOps vga_mm_ctrl_ops = { 59 .read = vga_mm_read, 60 .write = vga_mm_write, 61 .valid.min_access_size = 1, 62 .valid.max_access_size = 4, 63 .impl.min_access_size = 1, 64 .impl.max_access_size = 4, 65 .endianness = DEVICE_NATIVE_ENDIAN, 66 }; 67 68 static void vga_mm_init(VGAMmioState *s, hwaddr vram_base, 69 hwaddr ctrl_base, int it_shift, 70 MemoryRegion *address_space) 71 { 72 MemoryRegion *s_ioport_ctrl, *vga_io_memory; 73 74 s->it_shift = it_shift; 75 s_ioport_ctrl = g_malloc(sizeof(*s_ioport_ctrl)); 76 memory_region_init_io(s_ioport_ctrl, NULL, &vga_mm_ctrl_ops, s, 77 "vga-mm-ctrl", 0x100000); 78 memory_region_set_flush_coalesced(s_ioport_ctrl); 79 80 vga_io_memory = g_malloc(sizeof(*vga_io_memory)); 81 /* XXX: endianness? */ 82 memory_region_init_io(vga_io_memory, NULL, &vga_mem_ops, &s->vga, 83 "vga-mem", 0x20000); 84 85 vmstate_register(NULL, 0, &vmstate_vga_common, s); 86 87 memory_region_add_subregion(address_space, ctrl_base, s_ioport_ctrl); 88 s->vga.bank_offset = 0; 89 memory_region_add_subregion(address_space, 90 vram_base + 0x000a0000, vga_io_memory); 91 memory_region_set_coalescing(vga_io_memory); 92 } 93 94 int vga_mmio_init(hwaddr vram_base, hwaddr ctrl_base, 95 int it_shift, MemoryRegion *address_space) 96 { 97 VGAMmioState *s; 98 99 s = g_malloc0(sizeof(*s)); 100 101 s->vga.vram_size_mb = VGA_RAM_SIZE / MiB; 102 s->vga.global_vmstate = true; 103 vga_common_init(&s->vga, NULL); 104 vga_mm_init(s, vram_base, ctrl_base, it_shift, address_space); 105 106 s->vga.con = graphic_console_init(NULL, 0, s->vga.hw_ops, s); 107 108 memory_region_add_subregion(address_space, 109 VBE_DISPI_LFB_PHYSICAL_ADDRESS, 110 &s->vga.vram); 111 112 return 0; 113 } 114