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mac_via: move PRAM/RTC variables to MOS6522Q800VIA1State 

The PRAM/RTC is 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>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210830102447.10806-5-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 11:24:39 +01:00 committed by Laurent Vivier
parent 8064d7bb54
commit 741258b06c
2 changed files with 77 additions and 79 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

135
hw/misc/mac_via.c
View File

@ -433,9 +433,8 @@ static int via1_rtc_compact_cmd(uint8_t value)
return REG_INVALID;
}
static void via1_rtc_update(MacVIAState *m)
static void via1_rtc_update(MOS6522Q800VIA1State *v1s)
{
MOS6522Q800VIA1State *v1s = &m->mos6522_via1;
MOS6522State *s = MOS6522(v1s);
int cmd, sector, addr;
uint32_t time;
@ -447,40 +446,40 @@ static void via1_rtc_update(MacVIAState *m)
if (s->dirb & VIA1B_vRTCData) {
/* send bits to the RTC */
if (!(v1s->last_b & VIA1B_vRTCClk) && (s->b & VIA1B_vRTCClk)) {
m->data_out <<= 1;
m->data_out |= s->b & VIA1B_vRTCData;
m->data_out_cnt++;
v1s->data_out <<= 1;
v1s->data_out |= s->b & VIA1B_vRTCData;
v1s->data_out_cnt++;
}
trace_via1_rtc_update_data_out(m->data_out_cnt, m->data_out);
trace_via1_rtc_update_data_out(v1s->data_out_cnt, v1s->data_out);
} else {
trace_via1_rtc_update_data_in(m->data_in_cnt, m->data_in);
trace_via1_rtc_update_data_in(v1s->data_in_cnt, v1s->data_in);
/* receive bits from the RTC */
if ((v1s->last_b & VIA1B_vRTCClk) &&
!(s->b & VIA1B_vRTCClk) &&
m->data_in_cnt) {
v1s->data_in_cnt) {
s->b = (s->b & ~VIA1B_vRTCData) |
((m->data_in >> 7) & VIA1B_vRTCData);
m->data_in <<= 1;
m->data_in_cnt--;
((v1s->data_in >> 7) & VIA1B_vRTCData);
v1s->data_in <<= 1;
v1s->data_in_cnt--;
}
return;
}
if (m->data_out_cnt != 8) {
if (v1s->data_out_cnt != 8) {
return;
}
m->data_out_cnt = 0;
v1s->data_out_cnt = 0;
trace_via1_rtc_internal_status(m->cmd, m->alt, m->data_out);
trace_via1_rtc_internal_status(v1s->cmd, v1s->alt, v1s->data_out);
/* first byte: it's a command */
if (m->cmd == REG_EMPTY) {
if (v1s->cmd == REG_EMPTY) {
cmd = via1_rtc_compact_cmd(m->data_out);
cmd = via1_rtc_compact_cmd(v1s->data_out);
trace_via1_rtc_internal_cmd(cmd);
if (cmd == REG_INVALID) {
trace_via1_rtc_cmd_invalid(m->data_out);
trace_via1_rtc_cmd_invalid(v1s->data_out);
return;
}
@ -492,20 +491,20 @@ static void via1_rtc_update(MacVIAState *m)
* register 3 is highest-order byte
*/
time = m->tick_offset + (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)
time = v1s->tick_offset + (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)
/ NANOSECONDS_PER_SECOND);
trace_via1_rtc_internal_time(time);
m->data_in = (time >> ((cmd & 0x03) << 3)) & 0xff;
m->data_in_cnt = 8;
v1s->data_in = (time >> ((cmd & 0x03) << 3)) & 0xff;
v1s->data_in_cnt = 8;
trace_via1_rtc_cmd_seconds_read((cmd & 0x7f) - REG_0,
m->data_in);
v1s->data_in);
break;
case REG_PRAM_ADDR...REG_PRAM_ADDR_LAST:
/* PRAM address 0x00 -> 0x13 */
m->data_in = v1s->PRAM[(cmd & 0x7f) - REG_PRAM_ADDR];
m->data_in_cnt = 8;
v1s->data_in = v1s->PRAM[(cmd & 0x7f) - REG_PRAM_ADDR];
v1s->data_in_cnt = 8;
trace_via1_rtc_cmd_pram_read((cmd & 0x7f) - REG_PRAM_ADDR,
m->data_in);
v1s->data_in);
break;
case REG_PRAM_SECT...REG_PRAM_SECT_LAST:
/*
@ -513,7 +512,7 @@ static void via1_rtc_update(MacVIAState *m)
* the only two-byte read command
*/
trace_via1_rtc_internal_set_cmd(cmd);
m->cmd = cmd;
v1s->cmd = cmd;
break;
default:
g_assert_not_reached();
@ -523,9 +522,9 @@ static void via1_rtc_update(MacVIAState *m)
}
/* this is a write command, needs a parameter */
if (cmd == REG_WPROTECT || !m->wprotect) {
if (cmd == REG_WPROTECT || !v1s->wprotect) {
trace_via1_rtc_internal_set_cmd(cmd);
m->cmd = cmd;
v1s->cmd = cmd;
} else {
trace_via1_rtc_internal_ignore_cmd(cmd);
}
@ -533,46 +532,47 @@ static void via1_rtc_update(MacVIAState *m)
}
/* second byte: it's a parameter */
if (m->alt == REG_EMPTY) {
switch (m->cmd & 0x7f) {
if (v1s->alt == REG_EMPTY) {
switch (v1s->cmd & 0x7f) {
case REG_0...REG_3: /* seconds register */
/* FIXME */
trace_via1_rtc_cmd_seconds_write(m->cmd - REG_0, m->data_out);
m->cmd = REG_EMPTY;
trace_via1_rtc_cmd_seconds_write(v1s->cmd - REG_0, v1s->data_out);
v1s->cmd = REG_EMPTY;
break;
case REG_TEST:
/* device control: nothing to do */
trace_via1_rtc_cmd_test_write(m->data_out);
m->cmd = REG_EMPTY;
trace_via1_rtc_cmd_test_write(v1s->data_out);
v1s->cmd = REG_EMPTY;
break;
case REG_WPROTECT:
/* Write Protect register */
trace_via1_rtc_cmd_wprotect_write(m->data_out);
m->wprotect = !!(m->data_out & 0x80);
m->cmd = REG_EMPTY;
trace_via1_rtc_cmd_wprotect_write(v1s->data_out);
v1s->wprotect = !!(v1s->data_out & 0x80);
v1s->cmd = REG_EMPTY;
break;
case REG_PRAM_ADDR...REG_PRAM_ADDR_LAST:
/* 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;
trace_via1_rtc_cmd_pram_write(v1s->cmd - REG_PRAM_ADDR,
v1s->data_out);
v1s->PRAM[v1s->cmd - REG_PRAM_ADDR] = v1s->data_out;
pram_update(v1s);
m->cmd = REG_EMPTY;
v1s->cmd = REG_EMPTY;
break;
case REG_PRAM_SECT...REG_PRAM_SECT_LAST:
addr = (m->data_out >> 2) & 0x1f;
sector = (m->cmd & 0x7f) - REG_PRAM_SECT;
if (m->cmd & 0x80) {
addr = (v1s->data_out >> 2) & 0x1f;
sector = (v1s->cmd & 0x7f) - REG_PRAM_SECT;
if (v1s->cmd & 0x80) {
/* it's a read */
m->data_in = v1s->PRAM[sector * 32 + addr];
m->data_in_cnt = 8;
v1s->data_in = v1s->PRAM[sector * 32 + addr];
v1s->data_in_cnt = 8;
trace_via1_rtc_cmd_pram_sect_read(sector, addr,
sector * 32 + addr,
m->data_in);
m->cmd = REG_EMPTY;
v1s->data_in);
v1s->cmd = REG_EMPTY;
} else {
/* it's a write, we need one more parameter */
trace_via1_rtc_internal_set_alt(addr, sector, addr);
m->alt = addr;
v1s->alt = addr;
}
break;
default:
@ -583,14 +583,14 @@ static void via1_rtc_update(MacVIAState *m)
}
/* third byte: it's the data of a REG_PRAM_SECT write */
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;
g_assert(REG_PRAM_SECT <= v1s->cmd && v1s->cmd <= REG_PRAM_SECT_LAST);
sector = v1s->cmd - REG_PRAM_SECT;
v1s->PRAM[sector * 32 + v1s->alt] = v1s->data_out;
pram_update(v1s);
trace_via1_rtc_cmd_pram_sect_write(sector, m->alt, sector * 32 + m->alt,
m->data_out);
m->alt = REG_EMPTY;
m->cmd = REG_EMPTY;
trace_via1_rtc_cmd_pram_sect_write(sector, v1s->alt, sector * 32 + v1s->alt,
v1s->data_out);
v1s->alt = REG_EMPTY;
v1s->cmd = REG_EMPTY;
}
static void adb_via_poll(void *opaque)
@ -903,7 +903,7 @@ static void mos6522_q800_via1_write(void *opaque, hwaddr addr, uint64_t val,
switch (addr) {
case VIA_REG_B:
via1_rtc_update(m);
via1_rtc_update(v1s);
via1_adb_update(m);
v1s->last_b = ms->b;
@ -953,12 +953,13 @@ static const MemoryRegionOps mos6522_q800_via2_ops = {
static void mac_via_reset(DeviceState *dev)
{
MacVIAState *m = MAC_VIA(dev);
MOS6522Q800VIA1State *v1s = &m->mos6522_via1;
ADBBusState *adb_bus = &m->adb_bus;
adb_set_autopoll_enabled(adb_bus, true);
m->cmd = REG_EMPTY;
m->alt = REG_EMPTY;
v1s->cmd = REG_EMPTY;
v1s->alt = REG_EMPTY;
}
static void mac_via_realize(DeviceState *dev, Error **errp)
@ -1003,7 +1004,7 @@ static void mac_via_realize(DeviceState *dev, Error **errp)
via1_sixty_hz_update(&m->mos6522_via1);
qemu_get_timedate(&tm, 0);
m->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;
v1s->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;
adb_register_autopoll_callback(adb_bus, adb_via_poll, m);
m->adb_data_ready = qdev_get_gpio_in_named(dev, "via1-irq",
@ -1081,20 +1082,10 @@ static const VMStateDescription vmstate_mac_via = {
.minimum_version_id = 2,
.fields = (VMStateField[]) {
/* VIAs */
VMSTATE_BUFFER(mos6522_via1.PRAM, MacVIAState),
VMSTATE_TIMER_PTR(mos6522_via1.one_second_timer, MacVIAState),
VMSTATE_INT64(mos6522_via1.next_second, MacVIAState),
VMSTATE_TIMER_PTR(mos6522_via1.sixty_hz_timer, MacVIAState),
VMSTATE_INT64(mos6522_via1.next_sixty_hz, MacVIAState),
/* RTC */
VMSTATE_UINT32(tick_offset, MacVIAState),
VMSTATE_UINT8(data_out, MacVIAState),
VMSTATE_INT32(data_out_cnt, MacVIAState),
VMSTATE_UINT8(data_in, MacVIAState),
VMSTATE_UINT8(data_in_cnt, MacVIAState),
VMSTATE_UINT8(cmd, MacVIAState),
VMSTATE_INT32(wprotect, MacVIAState),
VMSTATE_INT32(alt, MacVIAState),
/* ADB */
VMSTATE_INT32(adb_data_in_size, MacVIAState),
VMSTATE_INT32(adb_data_in_index, MacVIAState),
@ -1154,6 +1145,14 @@ static const VMStateDescription vmstate_q800_via1 = {
VMSTATE_UINT8(last_b, MOS6522Q800VIA1State),
/* RTC */
VMSTATE_BUFFER(PRAM, MOS6522Q800VIA1State),
VMSTATE_UINT32(tick_offset, MOS6522Q800VIA1State),
VMSTATE_UINT8(data_out, MOS6522Q800VIA1State),
VMSTATE_INT32(data_out_cnt, MOS6522Q800VIA1State),
VMSTATE_UINT8(data_in, MOS6522Q800VIA1State),
VMSTATE_UINT8(data_in_cnt, MOS6522Q800VIA1State),
VMSTATE_UINT8(cmd, MOS6522Q800VIA1State),
VMSTATE_INT32(wprotect, MOS6522Q800VIA1State),
VMSTATE_INT32(alt, MOS6522Q800VIA1State),
VMSTATE_END_OF_LIST()
}
};

21
include/hw/misc/mac_via.h
View File

@ -46,6 +46,16 @@ struct MOS6522Q800VIA1State {
BlockBackend *blk;
VMChangeStateEntry *vmstate;
uint32_t tick_offset;
uint8_t data_out;
int data_out_cnt;
uint8_t data_in;
uint8_t data_in_cnt;
uint8_t cmd;
int wprotect;
int alt;
/* external timers */
QEMUTimer *one_second_timer;
int64_t next_second;
@ -93,17 +103,6 @@ struct MacVIAState {
MOS6522Q800VIA1State mos6522_via1;
MOS6522Q800VIA2State mos6522_via2;
/* RTC */
uint32_t tick_offset;
uint8_t data_out;
int data_out_cnt;
uint8_t data_in;
uint8_t data_in_cnt;
uint8_t cmd;
int wprotect;
int alt;
/* ADB */
ADBBusState adb_bus;
qemu_irq adb_data_ready;