root / hw / display / vga-isa-mm.c @ 49ab747f
History | View | Annotate | Download (4.3 kB)
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/hw.h" |
25 |
#include "ui/console.h" |
26 |
#include "hw/i386/pc.h" |
27 |
#include "hw/vga_int.h" |
28 |
#include "ui/pixel_ops.h" |
29 |
#include "qemu/timer.h" |
30 |
|
31 |
#define VGA_RAM_SIZE (8192 * 1024) |
32 |
|
33 |
typedef struct ISAVGAMMState { |
34 |
VGACommonState vga; |
35 |
int it_shift;
|
36 |
} ISAVGAMMState; |
37 |
|
38 |
/* Memory mapped interface */
|
39 |
static 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 |
|
46 |
static 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 |
|
54 |
static 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 |
|
61 |
static 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 |
|
69 |
static 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 |
|
76 |
static 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 |
|
84 |
static 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 |
|
100 |
static 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, &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, &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 |
|
126 |
int 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 >> 20;
|
135 |
vga_common_init(&s->vga); |
136 |
vga_mm_init(s, vram_base, ctrl_base, it_shift, address_space); |
137 |
|
138 |
s->vga.con = graphic_console_init(s->vga.update, s->vga.invalidate, |
139 |
s->vga.screen_dump, s->vga.text_update, |
140 |
s); |
141 |
|
142 |
vga_init_vbe(&s->vga, address_space); |
143 |
return 0; |
144 |
} |