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3b10b5673c
qemu-e2k/hw/display/macfb.c
Mark Cave-Ayland 3b10b5673c macfb: use memory_region_init_ram() in macfb_common_realize() for the framebuffer 
Currently macfb_common_realize() defines the framebuffer RAM memory region as
being non-migrateable but then immediately registers it for migration. Replace
memory_region_init_ram_nomigrate() with memory_region_init_ram() which is clearer
and does exactly the same thing.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20211007221253.29024-6-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-10-08 13:31:03 +02:00

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/*
* QEMU Motorola 680x0 Macintosh Video Card Emulation
* Copyright (c) 2012-2018 Laurent Vivier
*
* some parts from QEMU G364 framebuffer Emulator.
* Copyright (c) 2007-2011 Herve Poussineau
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "hw/sysbus.h"
#include "ui/console.h"
#include "ui/pixel_ops.h"
#include "hw/nubus/nubus.h"
#include "hw/display/macfb.h"
#include "qapi/error.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#define VIDEO_BASE 0x00001000
#define DAFB_BASE 0x00800000
#define MACFB_PAGE_SIZE 4096
#define MACFB_VRAM_SIZE (4 * MiB)
#define DAFB_RESET 0x200
#define DAFB_LUT 0x213
typedef void macfb_draw_line_func(MacfbState *s, uint8_t *d, uint32_t addr,
int width);
static inline uint8_t macfb_read_byte(MacfbState *s, uint32_t addr)
{
return s->vram[addr & s->vram_bit_mask];
}
/* 1-bit color */
static void macfb_draw_line1(MacfbState *s, uint8_t *d, uint32_t addr,
int width)
{
uint8_t r, g, b;
int x;
for (x = 0; x < width; x++) {
int bit = x & 7;
int idx = (macfb_read_byte(s, addr) >> (7 - bit)) & 1;
r = g = b = ((1 - idx) << 7);
addr += (bit == 7);
*(uint32_t *)d = rgb_to_pixel32(r, g, b);
d += 4;
}
}
/* 2-bit color */
static void macfb_draw_line2(MacfbState *s, uint8_t *d, uint32_t addr,
int width)
{
uint8_t r, g, b;
int x;
for (x = 0; x < width; x++) {
int bit = (x & 3);
int idx = (macfb_read_byte(s, addr) >> ((3 - bit) << 1)) & 3;
r = s->color_palette[idx * 3];
g = s->color_palette[idx * 3 + 1];
b = s->color_palette[idx * 3 + 2];
addr += (bit == 3);
*(uint32_t *)d = rgb_to_pixel32(r, g, b);
d += 4;
}
}
/* 4-bit color */
static void macfb_draw_line4(MacfbState *s, uint8_t *d, uint32_t addr,
int width)
{
uint8_t r, g, b;
int x;
for (x = 0; x < width; x++) {
int bit = x & 1;
int idx = (macfb_read_byte(s, addr) >> ((1 - bit) << 2)) & 15;
r = s->color_palette[idx * 3];
g = s->color_palette[idx * 3 + 1];
b = s->color_palette[idx * 3 + 2];
addr += (bit == 1);
*(uint32_t *)d = rgb_to_pixel32(r, g, b);
d += 4;
}
}
/* 8-bit color */
static void macfb_draw_line8(MacfbState *s, uint8_t *d, uint32_t addr,
int width)
{
uint8_t r, g, b;
int x;
for (x = 0; x < width; x++) {
r = s->color_palette[macfb_read_byte(s, addr) * 3];
g = s->color_palette[macfb_read_byte(s, addr) * 3 + 1];
b = s->color_palette[macfb_read_byte(s, addr) * 3 + 2];
addr++;
*(uint32_t *)d = rgb_to_pixel32(r, g, b);
d += 4;
}
}
/* 16-bit color */
static void macfb_draw_line16(MacfbState *s, uint8_t *d, uint32_t addr,
int width)
{
uint8_t r, g, b;
int x;
for (x = 0; x < width; x++) {
uint16_t pixel;
pixel = (macfb_read_byte(s, addr) << 8) | macfb_read_byte(s, addr + 1);
r = ((pixel >> 10) & 0x1f) << 3;
g = ((pixel >> 5) & 0x1f) << 3;
b = (pixel & 0x1f) << 3;
addr += 2;
*(uint32_t *)d = rgb_to_pixel32(r, g, b);
d += 4;
}
}
/* 24-bit color */
static void macfb_draw_line24(MacfbState *s, uint8_t *d, uint32_t addr,
int width)
{
uint8_t r, g, b;
int x;
for (x = 0; x < width; x++) {
r = macfb_read_byte(s, addr);
g = macfb_read_byte(s, addr + 1);
b = macfb_read_byte(s, addr + 2);
addr += 3;
*(uint32_t *)d = rgb_to_pixel32(r, g, b);
d += 4;
}
}
enum {
MACFB_DRAW_LINE1,
MACFB_DRAW_LINE2,
MACFB_DRAW_LINE4,
MACFB_DRAW_LINE8,
MACFB_DRAW_LINE16,
MACFB_DRAW_LINE24,
MACFB_DRAW_LINE_NB,
};
static macfb_draw_line_func * const
macfb_draw_line_table[MACFB_DRAW_LINE_NB] = {
macfb_draw_line1,
macfb_draw_line2,
macfb_draw_line4,
macfb_draw_line8,
macfb_draw_line16,
macfb_draw_line24,
};
static int macfb_check_dirty(MacfbState *s, DirtyBitmapSnapshot *snap,
ram_addr_t addr, int len)
{
return memory_region_snapshot_get_dirty(&s->mem_vram, snap, addr, len);
}
static void macfb_draw_graphic(MacfbState *s)
{
DisplaySurface *surface = qemu_console_surface(s->con);
DirtyBitmapSnapshot *snap = NULL;
ram_addr_t page;
uint32_t v = 0;
int y, ymin;
int macfb_stride = (s->depth * s->width + 7) / 8;
macfb_draw_line_func *macfb_draw_line;
switch (s->depth) {
case 1:
v = MACFB_DRAW_LINE1;
break;
case 2:
v = MACFB_DRAW_LINE2;
break;
case 4:
v = MACFB_DRAW_LINE4;
break;
case 8:
v = MACFB_DRAW_LINE8;
break;
case 16:
v = MACFB_DRAW_LINE16;
break;
case 24:
v = MACFB_DRAW_LINE24;
break;
}
macfb_draw_line = macfb_draw_line_table[v];
assert(macfb_draw_line != NULL);
snap = memory_region_snapshot_and_clear_dirty(&s->mem_vram, 0x0,
memory_region_size(&s->mem_vram),
DIRTY_MEMORY_VGA);
ymin = -1;
page = 0;
for (y = 0; y < s->height; y++, page += macfb_stride) {
if (macfb_check_dirty(s, snap, page, macfb_stride)) {
uint8_t *data_display;
data_display = surface_data(surface) + y * surface_stride(surface);
macfb_draw_line(s, data_display, page, s->width);
if (ymin < 0) {
ymin = y;
}
} else {
if (ymin >= 0) {
dpy_gfx_update(s->con, 0, ymin, s->width, y - ymin);
ymin = -1;
}
}
}
if (ymin >= 0) {
dpy_gfx_update(s->con, 0, ymin, s->width, y - ymin);
}
g_free(snap);
}
static void macfb_invalidate_display(void *opaque)
{
MacfbState *s = opaque;
memory_region_set_dirty(&s->mem_vram, 0, MACFB_VRAM_SIZE);
}
static void macfb_update_display(void *opaque)
{
MacfbState *s = opaque;
DisplaySurface *surface = qemu_console_surface(s->con);
qemu_flush_coalesced_mmio_buffer();
if (s->width == 0 || s->height == 0) {
return;
}
if (s->width != surface_width(surface) ||
s->height != surface_height(surface)) {
qemu_console_resize(s->con, s->width, s->height);
}
macfb_draw_graphic(s);
}
static void macfb_reset(MacfbState *s)
{
int i;
s->palette_current = 0;
for (i = 0; i < 256; i++) {
s->color_palette[i * 3] = 255 - i;
s->color_palette[i * 3 + 1] = 255 - i;
s->color_palette[i * 3 + 2] = 255 - i;
}
memset(s->vram, 0, MACFB_VRAM_SIZE);
macfb_invalidate_display(s);
}
static uint64_t macfb_ctrl_read(void *opaque,
hwaddr addr,
unsigned int size)
{
return 0;
}
static void macfb_ctrl_write(void *opaque,
hwaddr addr,
uint64_t val,
unsigned int size)
{
MacfbState *s = opaque;
switch (addr) {
case DAFB_RESET:
s->palette_current = 0;
break;
case DAFB_LUT:
s->color_palette[s->palette_current] = val;
s->palette_current = (s->palette_current + 1) %
ARRAY_SIZE(s->color_palette);
if (s->palette_current % 3) {
macfb_invalidate_display(s);
}
break;
}
}
static const MemoryRegionOps macfb_ctrl_ops = {
.read = macfb_ctrl_read,
.write = macfb_ctrl_write,
.endianness = DEVICE_BIG_ENDIAN,
.impl.min_access_size = 1,
.impl.max_access_size = 4,
};
static int macfb_post_load(void *opaque, int version_id)
{
macfb_invalidate_display(opaque);
return 0;
}
static const VMStateDescription vmstate_macfb = {
.name = "macfb",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.post_load = macfb_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT8_ARRAY(color_palette, MacfbState, 256 * 3),
VMSTATE_UINT32(palette_current, MacfbState),
VMSTATE_END_OF_LIST()
}
};
static const GraphicHwOps macfb_ops = {
.invalidate = macfb_invalidate_display,
.gfx_update = macfb_update_display,
};
static bool macfb_common_realize(DeviceState *dev, MacfbState *s, Error **errp)
{
DisplaySurface *surface;
if (s->depth != 1 && s->depth != 2 && s->depth != 4 && s->depth != 8 &&
s->depth != 16 && s->depth != 24) {
error_setg(errp, "unknown guest depth %d", s->depth);
return false;
}
s->con = graphic_console_init(dev, 0, &macfb_ops, s);
surface = qemu_console_surface(s->con);
if (surface_bits_per_pixel(surface) != 32) {
error_setg(errp, "unknown host depth %d",
surface_bits_per_pixel(surface));
return false;
}
memory_region_init_io(&s->mem_ctrl, OBJECT(dev), &macfb_ctrl_ops, s,
"macfb-ctrl", 0x1000);
memory_region_init_ram(&s->mem_vram, OBJECT(dev), "macfb-vram",
MACFB_VRAM_SIZE, &error_abort);
s->vram = memory_region_get_ram_ptr(&s->mem_vram);
s->vram_bit_mask = MACFB_VRAM_SIZE - 1;
memory_region_set_coalescing(&s->mem_vram);
return true;
}
static void macfb_sysbus_realize(DeviceState *dev, Error **errp)
{
MacfbSysBusState *s = MACFB(dev);
MacfbState *ms = &s->macfb;
if (!macfb_common_realize(dev, ms, errp)) {
return;
}
sysbus_init_mmio(SYS_BUS_DEVICE(s), &ms->mem_ctrl);
sysbus_init_mmio(SYS_BUS_DEVICE(s), &ms->mem_vram);
}
static void macfb_nubus_realize(DeviceState *dev, Error **errp)
{
NubusDevice *nd = NUBUS_DEVICE(dev);
MacfbNubusState *s = NUBUS_MACFB(dev);
MacfbNubusDeviceClass *ndc = NUBUS_MACFB_GET_CLASS(dev);
MacfbState *ms = &s->macfb;
ndc->parent_realize(dev, errp);
if (*errp) {
return;
}
if (!macfb_common_realize(dev, ms, errp)) {
return;
}
memory_region_add_subregion(&nd->slot_mem, DAFB_BASE, &ms->mem_ctrl);
memory_region_add_subregion(&nd->slot_mem, VIDEO_BASE, &ms->mem_vram);
}
static void macfb_sysbus_reset(DeviceState *d)
{
MacfbSysBusState *s = MACFB(d);
macfb_reset(&s->macfb);
}
static void macfb_nubus_reset(DeviceState *d)
{
MacfbNubusState *s = NUBUS_MACFB(d);
macfb_reset(&s->macfb);
}
static Property macfb_sysbus_properties[] = {
DEFINE_PROP_UINT32("width", MacfbSysBusState, macfb.width, 640),
DEFINE_PROP_UINT32("height", MacfbSysBusState, macfb.height, 480),
DEFINE_PROP_UINT8("depth", MacfbSysBusState, macfb.depth, 8),
DEFINE_PROP_END_OF_LIST(),
};
static Property macfb_nubus_properties[] = {
DEFINE_PROP_UINT32("width", MacfbNubusState, macfb.width, 640),
DEFINE_PROP_UINT32("height", MacfbNubusState, macfb.height, 480),
DEFINE_PROP_UINT8("depth", MacfbNubusState, macfb.depth, 8),
DEFINE_PROP_END_OF_LIST(),
};
static void macfb_sysbus_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = macfb_sysbus_realize;
dc->desc = "SysBus Macintosh framebuffer";
dc->reset = macfb_sysbus_reset;
dc->vmsd = &vmstate_macfb;
device_class_set_props(dc, macfb_sysbus_properties);
}
static void macfb_nubus_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
MacfbNubusDeviceClass *ndc = NUBUS_MACFB_CLASS(klass);
device_class_set_parent_realize(dc, macfb_nubus_realize,
&ndc->parent_realize);
dc->desc = "Nubus Macintosh framebuffer";
dc->reset = macfb_nubus_reset;
dc->vmsd = &vmstate_macfb;
set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
device_class_set_props(dc, macfb_nubus_properties);
}
static TypeInfo macfb_sysbus_info = {
.name = TYPE_MACFB,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(MacfbSysBusState),
.class_init = macfb_sysbus_class_init,
};
static TypeInfo macfb_nubus_info = {
.name = TYPE_NUBUS_MACFB,
.parent = TYPE_NUBUS_DEVICE,
.instance_size = sizeof(MacfbNubusState),
.class_init = macfb_nubus_class_init,
.class_size = sizeof(MacfbNubusDeviceClass),
};
static void macfb_register_types(void)
{
type_register_static(&macfb_sysbus_info);
type_register_static(&macfb_nubus_info);
}
type_init(macfb_register_types)
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