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/*
* 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"
#include "exec-memory.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 *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(get_system_memory(), ctrl_base, s_ioport_ctrl);
s->vga.bank_offset = 0;
memory_region_add_subregion(get_system_memory(),
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)
{
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);
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);
return 0;
}
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