140 lines
4.3 KiB
C
140 lines
4.3 KiB
C
/*
|
|
* QEMU ISA MM VGA Emulator.
|
|
*
|
|
* Copyright (c) 2003 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#include "hw.h"
|
|
#include "console.h"
|
|
#include "pc.h"
|
|
#include "vga_int.h"
|
|
#include "pixel_ops.h"
|
|
#include "qemu-timer.h"
|
|
|
|
typedef struct ISAVGAMMState {
|
|
VGACommonState vga;
|
|
int it_shift;
|
|
} ISAVGAMMState;
|
|
|
|
/* Memory mapped interface */
|
|
static uint32_t vga_mm_readb (void *opaque, target_phys_addr_t addr)
|
|
{
|
|
ISAVGAMMState *s = opaque;
|
|
|
|
return vga_ioport_read(&s->vga, addr >> s->it_shift) & 0xff;
|
|
}
|
|
|
|
static void vga_mm_writeb (void *opaque,
|
|
target_phys_addr_t addr, uint32_t value)
|
|
{
|
|
ISAVGAMMState *s = opaque;
|
|
|
|
vga_ioport_write(&s->vga, addr >> s->it_shift, value & 0xff);
|
|
}
|
|
|
|
static uint32_t vga_mm_readw (void *opaque, target_phys_addr_t addr)
|
|
{
|
|
ISAVGAMMState *s = opaque;
|
|
|
|
return vga_ioport_read(&s->vga, addr >> s->it_shift) & 0xffff;
|
|
}
|
|
|
|
static void vga_mm_writew (void *opaque,
|
|
target_phys_addr_t addr, uint32_t value)
|
|
{
|
|
ISAVGAMMState *s = opaque;
|
|
|
|
vga_ioport_write(&s->vga, addr >> s->it_shift, value & 0xffff);
|
|
}
|
|
|
|
static uint32_t vga_mm_readl (void *opaque, target_phys_addr_t addr)
|
|
{
|
|
ISAVGAMMState *s = opaque;
|
|
|
|
return vga_ioport_read(&s->vga, addr >> s->it_shift);
|
|
}
|
|
|
|
static void vga_mm_writel (void *opaque,
|
|
target_phys_addr_t addr, uint32_t value)
|
|
{
|
|
ISAVGAMMState *s = opaque;
|
|
|
|
vga_ioport_write(&s->vga, addr >> s->it_shift, value);
|
|
}
|
|
|
|
static const MemoryRegionOps vga_mm_ctrl_ops = {
|
|
.old_mmio = {
|
|
.read = {
|
|
vga_mm_readb,
|
|
vga_mm_readw,
|
|
vga_mm_readl,
|
|
},
|
|
.write = {
|
|
vga_mm_writeb,
|
|
vga_mm_writew,
|
|
vga_mm_writel,
|
|
},
|
|
},
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
};
|
|
|
|
static void vga_mm_init(ISAVGAMMState *s, target_phys_addr_t vram_base,
|
|
target_phys_addr_t ctrl_base, int it_shift,
|
|
MemoryRegion *address_space)
|
|
{
|
|
MemoryRegion *s_ioport_ctrl, *vga_io_memory;
|
|
|
|
s->it_shift = it_shift;
|
|
s_ioport_ctrl = g_malloc(sizeof(*s_ioport_ctrl));
|
|
memory_region_init_io(s_ioport_ctrl, &vga_mm_ctrl_ops, s,
|
|
"vga-mm-ctrl", 0x100000);
|
|
|
|
vga_io_memory = g_malloc(sizeof(*vga_io_memory));
|
|
/* XXX: endianness? */
|
|
memory_region_init_io(vga_io_memory, &vga_mem_ops, &s->vga,
|
|
"vga-mem", 0x20000);
|
|
|
|
vmstate_register(NULL, 0, &vmstate_vga_common, s);
|
|
|
|
memory_region_add_subregion(address_space, ctrl_base, s_ioport_ctrl);
|
|
s->vga.bank_offset = 0;
|
|
memory_region_add_subregion(address_space,
|
|
vram_base + 0x000a0000, vga_io_memory);
|
|
memory_region_set_coalescing(vga_io_memory);
|
|
}
|
|
|
|
int isa_vga_mm_init(target_phys_addr_t vram_base,
|
|
target_phys_addr_t ctrl_base, int it_shift,
|
|
MemoryRegion *address_space)
|
|
{
|
|
ISAVGAMMState *s;
|
|
|
|
s = g_malloc0(sizeof(*s));
|
|
|
|
vga_common_init(&s->vga, VGA_RAM_SIZE);
|
|
vga_mm_init(s, vram_base, ctrl_base, it_shift, address_space);
|
|
|
|
s->vga.ds = graphic_console_init(s->vga.update, s->vga.invalidate,
|
|
s->vga.screen_dump, s->vga.text_update, s);
|
|
|
|
vga_init_vbe(&s->vga, address_space);
|
|
return 0;
|
|
}
|