linux-user: stack_base is now mandatory on all targets
[qemu.git] / 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
31 typedef struct ISAVGAMMState {
32 VGACommonState vga;
33 int it_shift;
34 } ISAVGAMMState;
35
36 /* Memory mapped interface */
37 static uint32_t vga_mm_readb (void *opaque, target_phys_addr_t addr)
38 {
39 ISAVGAMMState *s = opaque;
40
41 return vga_ioport_read(&s->vga, addr >> s->it_shift) & 0xff;
42 }
43
44 static void vga_mm_writeb (void *opaque,
45 target_phys_addr_t addr, uint32_t value)
46 {
47 ISAVGAMMState *s = opaque;
48
49 vga_ioport_write(&s->vga, addr >> s->it_shift, value & 0xff);
50 }
51
52 static uint32_t vga_mm_readw (void *opaque, target_phys_addr_t addr)
53 {
54 ISAVGAMMState *s = opaque;
55
56 return vga_ioport_read(&s->vga, addr >> s->it_shift) & 0xffff;
57 }
58
59 static void vga_mm_writew (void *opaque,
60 target_phys_addr_t addr, uint32_t value)
61 {
62 ISAVGAMMState *s = opaque;
63
64 vga_ioport_write(&s->vga, addr >> s->it_shift, value & 0xffff);
65 }
66
67 static uint32_t vga_mm_readl (void *opaque, target_phys_addr_t addr)
68 {
69 ISAVGAMMState *s = opaque;
70
71 return vga_ioport_read(&s->vga, addr >> s->it_shift);
72 }
73
74 static void vga_mm_writel (void *opaque,
75 target_phys_addr_t addr, uint32_t value)
76 {
77 ISAVGAMMState *s = opaque;
78
79 vga_ioport_write(&s->vga, addr >> s->it_shift, value);
80 }
81
82 static const MemoryRegionOps vga_mm_ctrl_ops = {
83 .old_mmio = {
84 .read = {
85 vga_mm_readb,
86 vga_mm_readw,
87 vga_mm_readl,
88 },
89 .write = {
90 vga_mm_writeb,
91 vga_mm_writew,
92 vga_mm_writel,
93 },
94 },
95 .endianness = DEVICE_NATIVE_ENDIAN,
96 };
97
98 static void vga_mm_init(ISAVGAMMState *s, target_phys_addr_t vram_base,
99 target_phys_addr_t ctrl_base, int it_shift,
100 MemoryRegion *address_space)
101 {
102 MemoryRegion *s_ioport_ctrl, *vga_io_memory;
103
104 s->it_shift = it_shift;
105 s_ioport_ctrl = g_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 = g_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(address_space, ctrl_base, s_ioport_ctrl);
117 s->vga.bank_offset = 0;
118 memory_region_add_subregion(address_space,
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 MemoryRegion *address_space)
126 {
127 ISAVGAMMState *s;
128
129 s = g_malloc0(sizeof(*s));
130
131 vga_common_init(&s->vga, VGA_RAM_SIZE);
132 vga_mm_init(s, vram_base, ctrl_base, it_shift, address_space);
133
134 s->vga.ds = graphic_console_init(s->vga.update, s->vga.invalidate,
135 s->vga.screen_dump, s->vga.text_update, s);
136
137 vga_init_vbe(&s->vga, address_space);
138 return 0;
139 }