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mac_via: move PRAM contents and block backend to MOS6522Q800VIA1State 

The PRAM contents are accessed using clock and data pins on q800 VIA1 port B
and so can be moved to MOS6522Q800VIA1State.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20210830102447.10806-4-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Mark Cave-Ayland 2021-08-30 11:24:38 +01:00 committed by Laurent Vivier
parent ae6f236f4f
commit 8064d7bb54
2 changed files with 34 additions and 32 deletions
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59
hw/misc/mac_via.c
View File

@ -374,11 +374,10 @@ static void via2_irq_request(void *opaque, int irq, int level)
}
static void pram_update(MacVIAState *m)
static void pram_update(MOS6522Q800VIA1State *v1s)
{
if (m->blk) {
if (blk_pwrite(m->blk, 0, m->mos6522_via1.PRAM,
sizeof(m->mos6522_via1.PRAM), 0) < 0) {
if (v1s->blk) {
if (blk_pwrite(v1s->blk, 0, v1s->PRAM, sizeof(v1s->PRAM), 0) < 0) {
qemu_log("pram_update: cannot write to file\n");
}
}
@ -556,7 +555,7 @@ static void via1_rtc_update(MacVIAState *m)
/* PRAM address 0x00 -> 0x13 */
trace_via1_rtc_cmd_pram_write(m->cmd - REG_PRAM_ADDR, m->data_out);
v1s->PRAM[m->cmd - REG_PRAM_ADDR] = m->data_out;
pram_update(m);
pram_update(v1s);
m->cmd = REG_EMPTY;
break;
case REG_PRAM_SECT...REG_PRAM_SECT_LAST:
@ -587,7 +586,7 @@ static void via1_rtc_update(MacVIAState *m)
g_assert(REG_PRAM_SECT <= m->cmd && m->cmd <= REG_PRAM_SECT_LAST);
sector = m->cmd - REG_PRAM_SECT;
v1s->PRAM[sector * 32 + m->alt] = m->data_out;
pram_update(m);
pram_update(v1s);
trace_via1_rtc_cmd_pram_sect_write(sector, m->alt, sector * 32 + m->alt,
m->data_out);
m->alt = REG_EMPTY;
@ -965,6 +964,7 @@ static void mac_via_reset(DeviceState *dev)
static void mac_via_realize(DeviceState *dev, Error **errp)
{
MacVIAState *m = MAC_VIA(dev);
MOS6522Q800VIA1State *v1s = &m->mos6522_via1;
MOS6522State *ms;
ADBBusState *adb_bus = &m->adb_bus;
struct tm tm;
@ -1009,23 +1009,22 @@ static void mac_via_realize(DeviceState *dev, Error **errp)
m->adb_data_ready = qdev_get_gpio_in_named(dev, "via1-irq",
VIA1_IRQ_ADB_READY_BIT);
if (m->blk) {
int64_t len = blk_getlength(m->blk);
if (v1s->blk) {
int64_t len = blk_getlength(v1s->blk);
if (len < 0) {
error_setg_errno(errp, -len,
"could not get length of backing image");
return;
}
ret = blk_set_perm(m->blk,
ret = blk_set_perm(v1s->blk,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE,
BLK_PERM_ALL, errp);
if (ret < 0) {
return;
}
len = blk_pread(m->blk, 0, m->mos6522_via1.PRAM,
sizeof(m->mos6522_via1.PRAM));
if (len != sizeof(m->mos6522_via1.PRAM)) {
len = blk_pread(v1s->blk, 0, v1s->PRAM, sizeof(v1s->PRAM));
if (len != sizeof(v1s->PRAM)) {
error_setg(errp, "can't read PRAM contents");
return;
}
@ -1054,23 +1053,23 @@ static void mac_via_init(Object *obj)
TYPE_ADB_BUS, DEVICE(obj), "adb.0");
}
static void postload_update_cb(void *opaque, bool running, RunState state)
static void via1_postload_update_cb(void *opaque, bool running, RunState state)
{
MacVIAState *m = MAC_VIA(opaque);
MOS6522Q800VIA1State *v1s = MOS6522_Q800_VIA1(opaque);
qemu_del_vm_change_state_handler(m->vmstate);
m->vmstate = NULL;
qemu_del_vm_change_state_handler(v1s->vmstate);
v1s->vmstate = NULL;
pram_update(m);
pram_update(v1s);
}
static int mac_via_post_load(void *opaque, int version_id)
static int via1_post_load(void *opaque, int version_id)
{
MacVIAState *m = MAC_VIA(opaque);
MOS6522Q800VIA1State *v1s = MOS6522_Q800_VIA1(opaque);
if (m->blk) {
m->vmstate = qemu_add_vm_change_state_handler(postload_update_cb,
m);
if (v1s->blk) {
v1s->vmstate = qemu_add_vm_change_state_handler(
via1_postload_update_cb, v1s);
}
return 0;
@ -1080,7 +1079,6 @@ static const VMStateDescription vmstate_mac_via = {
.name = "mac-via",
.version_id = 2,
.minimum_version_id = 2,
.post_load = mac_via_post_load,
.fields = (VMStateField[]) {
/* VIAs */
VMSTATE_BUFFER(mos6522_via1.PRAM, MacVIAState),
@ -1108,11 +1106,6 @@ static const VMStateDescription vmstate_mac_via = {
}
};
static Property mac_via_properties[] = {
DEFINE_PROP_DRIVE("drive", MacVIAState, blk),
DEFINE_PROP_END_OF_LIST(),
};
static void mac_via_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
@ -1120,7 +1113,6 @@ static void mac_via_class_init(ObjectClass *oc, void *data)
dc->realize = mac_via_realize;
dc->reset = mac_via_reset;
dc->vmsd = &vmstate_mac_via;
device_class_set_props(dc, mac_via_properties);
}
static TypeInfo mac_via_info = {
@ -1155,20 +1147,29 @@ static const VMStateDescription vmstate_q800_via1 = {
.name = "q800-via1",
.version_id = 0,
.minimum_version_id = 0,
.post_load = via1_post_load,
.fields = (VMStateField[]) {
VMSTATE_STRUCT(parent_obj, MOS6522Q800VIA1State, 0, vmstate_mos6522,
MOS6522State),
VMSTATE_UINT8(last_b, MOS6522Q800VIA1State),
/* RTC */
VMSTATE_BUFFER(PRAM, MOS6522Q800VIA1State),
VMSTATE_END_OF_LIST()
}
};
static Property mos6522_q800_via1_properties[] = {
DEFINE_PROP_DRIVE("drive", MOS6522Q800VIA1State, blk),
DEFINE_PROP_END_OF_LIST(),
};
static void mos6522_q800_via1_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->reset = mos6522_q800_via1_reset;
dc->vmsd = &vmstate_q800_via1;
device_class_set_props(dc, mos6522_q800_via1_properties);
}
static const TypeInfo mos6522_q800_via1_type_info = {

7
include/hw/misc/mac_via.h
View File

@ -40,7 +40,11 @@ struct MOS6522Q800VIA1State {
qemu_irq irqs[VIA1_IRQ_NB];
uint8_t last_b;
/* RTC */
uint8_t PRAM[256];
BlockBackend *blk;
VMChangeStateEntry *vmstate;
/* external timers */
QEMUTimer *one_second_timer;
@ -80,8 +84,6 @@ OBJECT_DECLARE_SIMPLE_TYPE(MacVIAState, MAC_VIA)
struct MacVIAState {
SysBusDevice busdev;
VMChangeStateEntry *vmstate;
/* MMIO */
MemoryRegion mmio;
MemoryRegion via1mem;
@ -101,7 +103,6 @@ struct MacVIAState {
uint8_t cmd;
int wprotect;
int alt;
BlockBackend *blk;
/* ADB */
ADBBusState adb_bus;