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Prepared the API to set the PIT constant.

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This commit is contained in:
OBattler
2024-03-23 06:15:34 +01:00
parent 01b026c76e
commit 2466da2161
5 changed files with 112 additions and 31 deletions
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9
src/include/86box/pit.h
View File

@@ -71,6 +71,9 @@ typedef struct PIT {
ctr_t counters[3];
uint8_t ctrl;
uint64_t pit_const;
void *dev_priv;
} pit_t;
@@ -97,6 +100,7 @@ typedef struct pit_intf_t {
/* Sets a counter's load count handler. */
void (*set_load_func)(void *data, int counter_id, void (*func)(uint8_t new_m, int new_count));
void (*ctr_clock)(void *data, int counter_id);
void (*set_pit_const)(void *data, uint64_t pit_const);
void *data;
} pit_intf_t;
@@ -108,6 +112,7 @@ extern double PCICLK;
extern double AGPCLK;
extern uint64_t PITCONST;
extern uint64_t PAS16CONST;
extern uint64_t ISACONST;
extern uint64_t CGACONST;
extern uint64_t MDACONST;
@@ -118,6 +123,10 @@ extern uint64_t RTCCONST;
extern int refresh_at_enable;
extern void pit_change_pas16_const(double prescale);
extern void pit_set_pit_const(void *data, uint64_t pit_const);
/* Sets a counter's CLOCK input. */
extern void pit_ctr_set_clock(ctr_t *ctr, int clock, void *priv);

5
src/include/86box/pit_fast.h
View File

@@ -56,6 +56,9 @@ typedef struct ctrf_t {
};
uint32_t l;
uint64_t pit_const;
pc_timer_t timer;
void (*load_func)(uint8_t new_m, int new_count);
@@ -70,6 +73,8 @@ typedef struct pitf_t {
uint8_t ctrl;
} pitf_t;
extern void pitf_set_pit_const(void *data, uint64_t pit_const);
extern uint8_t pitf_read_reg(void *priv, uint8_t reg);
extern const pit_intf_t pit_fast_intf;

38
src/pit.c
View File

@@ -47,6 +47,7 @@ pit_intf_t pit_devs[2];
double cpuclock;
double PITCONSTD;
double PAS16CONSTD;
double SYSCLK;
double isa_timing;
double bus_timing;
@@ -56,6 +57,7 @@ double PCICLK;
double AGPCLK;
uint64_t PITCONST;
uint64_t PAS16CONST;
uint64_t ISACONST;
uint64_t CGACONST;
uint64_t MDACONST;
@@ -523,7 +525,7 @@ pit_timer_over(void *priv)
for (uint8_t i = 0; i < 3; i++)
pit_ctr_set_clock_common(&dev->counters[i], dev->clock, dev);
timer_advance_u64(&dev->callback_timer, PITCONST >> 1ULL);
timer_advance_u64(&dev->callback_timer, dev->pit_const >> 1ULL);
}
static void
@@ -873,6 +875,20 @@ pit_handler(int set, uint16_t base, int size, void *priv)
io_handler(set, base, size, pit_read, NULL, NULL, pit_write, NULL, NULL, priv);
}
void
pit_set_pit_const(void *data, uint64_t pit_const)
{
pit_t *pit = (pit_t *) data;
pit->pit_const = pit_const;
}
static void
pit_speed_changed(void *priv)
{
pit_set_pit_const(priv, PITCONST);
}
static void
pit_close(void *priv)
{
@@ -896,7 +912,7 @@ pit_init(const device_t *info)
if (!(dev->flags & PIT_PS2) && !(dev->flags & PIT_CUSTOM_CLOCK)) {
timer_add(&dev->callback_timer, pit_timer_over, (void *) dev, 0);
timer_set_delay_u64(&dev->callback_timer, PITCONST >> 1ULL);
timer_set_delay_u64(&dev->callback_timer, dev->pit_const >> 1ULL);
}
dev->flags = info->local;
@@ -919,7 +935,7 @@ const device_t i8253_device = {
.close = pit_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = NULL,
.speed_changed = pit_speed_changed,
.force_redraw = NULL,
.config = NULL
};
@@ -947,7 +963,7 @@ const device_t i8254_device = {
.close = pit_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = NULL,
.speed_changed = pit_speed_changed,
.force_redraw = NULL,
.config = NULL
};
@@ -961,7 +977,7 @@ const device_t i8254_sec_device = {
.close = pit_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = NULL,
.speed_changed = pit_speed_changed,
.force_redraw = NULL,
.config = NULL
};
@@ -989,7 +1005,7 @@ const device_t i8254_ps2_device = {
.close = pit_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = NULL,
.speed_changed = pit_speed_changed,
.force_redraw = NULL,
.config = NULL
};
@@ -1074,6 +1090,12 @@ pit_ps2_init(int type)
return pit;
}
void
pit_change_pas16_const(double prescale)
{
PAS16CONST = (uint64_t) ((PITCONSTD / prescale) * (double) (1ULL << 32));
}
void
pit_set_clock(uint32_t clock)
{
@@ -1169,6 +1191,9 @@ pit_set_clock(uint32_t clock)
TIMER_USEC = (uint64_t) ((cpuclock / 1000000.0) * (double) (1ULL << 32));
PAS16CONSTD = (cpuclock / 441000.0);
PAS16CONST = (uint64_t) (PITCONSTD * (double) (1ULL << 32));
isa_timing = (cpuclock / (double) cpu_isa_speed);
if (cpu_64bitbus)
bus_timing = (cpuclock / (cpu_busspeed / 2));
@@ -1200,5 +1225,6 @@ const pit_intf_t pit_classic_intf = {
&pit_ctr_set_out_func,
&pit_ctr_set_load_func,
&ctr_clock,
&pit_set_pit_const,
NULL,
};

63
src/pit_fast.c
View File

@@ -126,7 +126,7 @@ static int
pitf_read_timer(ctrf_t *ctr)
{
if (ctr->using_timer && !(ctr->m == 3 && !ctr->gate) && timer_is_enabled(&ctr->timer)) {
int read = (int) ((timer_get_remaining_u64(&ctr->timer)) / PITCONST);
int read = (int) ((timer_get_remaining_u64(&ctr->timer)) / ctr->pit_const);
if (ctr->m == 2)
read++;
if (read < 0)
@@ -168,7 +168,7 @@ pitf_ctr_load(ctrf_t *ctr, void *priv)
case 0: /*Interrupt on terminal count*/
ctr->count = l;
if (ctr->using_timer)
timer_set_delay_u64(&ctr->timer, (uint64_t) (l * PITCONST));
timer_set_delay_u64(&ctr->timer, (uint64_t) (l * ctr->pit_const));
pitf_ctr_set_out(ctr, 0, pit);
ctr->thit = 0;
ctr->enabled = ctr->gate;
@@ -180,7 +180,7 @@ pitf_ctr_load(ctrf_t *ctr, void *priv)
if (ctr->initial) {
ctr->count = l - 1;
if (ctr->using_timer)
timer_set_delay_u64(&ctr->timer, (uint64_t) ((l - 1) * PITCONST));
timer_set_delay_u64(&ctr->timer, (uint64_t) ((l - 1) * ctr->pit_const));
pitf_ctr_set_out(ctr, 1, pit);
ctr->thit = 0;
}
@@ -190,7 +190,7 @@ pitf_ctr_load(ctrf_t *ctr, void *priv)
if (ctr->initial) {
ctr->count = l;
if (ctr->using_timer)
timer_set_delay_u64(&ctr->timer, (uint64_t) (((l + 1) >> 1) * PITCONST));
timer_set_delay_u64(&ctr->timer, (uint64_t) (((l + 1) >> 1) * ctr->pit_const));
pitf_ctr_set_out(ctr, 1, pit);
ctr->thit = 0;
}
@@ -202,7 +202,7 @@ pitf_ctr_load(ctrf_t *ctr, void *priv)
else {
ctr->count = l;
if (ctr->using_timer)
timer_set_delay_u64(&ctr->timer, (uint64_t) (l * PITCONST));
timer_set_delay_u64(&ctr->timer, (uint64_t) (l * ctr->pit_const));
pitf_ctr_set_out(ctr, 0, pit);
ctr->thit = 0;
}
@@ -240,7 +240,7 @@ pitf_set_gate_no_timer(ctrf_t *ctr, int gate, void *priv)
case 0: /*Interrupt on terminal count*/
case 4: /*Software triggered stobe*/
if (ctr->using_timer && !ctr->running)
timer_set_delay_u64(&ctr->timer, (uint64_t) (l * PITCONST));
timer_set_delay_u64(&ctr->timer, (uint64_t) (l * ctr->pit_const));
ctr->enabled = gate;
break;
case 1: /*Hardware retriggerable one-shot*/
@@ -248,7 +248,7 @@ pitf_set_gate_no_timer(ctrf_t *ctr, int gate, void *priv)
if (gate && !ctr->gate) {
ctr->count = l;
if (ctr->using_timer)
timer_set_delay_u64(&ctr->timer, (uint64_t) (l * PITCONST));
timer_set_delay_u64(&ctr->timer, (uint64_t) (l * ctr->pit_const));
pitf_ctr_set_out(ctr, 0, pit);
ctr->thit = 0;
ctr->enabled = 1;
@@ -258,7 +258,7 @@ pitf_set_gate_no_timer(ctrf_t *ctr, int gate, void *priv)
if (gate && !ctr->gate) {
ctr->count = l - 1;
if (ctr->using_timer)
timer_set_delay_u64(&ctr->timer, (uint64_t) (l * PITCONST));
timer_set_delay_u64(&ctr->timer, (uint64_t) (l * ctr->pit_const));
pitf_ctr_set_out(ctr, 1, pit);
ctr->thit = 0;
}
@@ -268,7 +268,7 @@ pitf_set_gate_no_timer(ctrf_t *ctr, int gate, void *priv)
if (gate && !ctr->gate) {
ctr->count = l;
if (ctr->using_timer)
timer_set_delay_u64(&ctr->timer, (uint64_t) (((l + 1) >> 1) * PITCONST));
timer_set_delay_u64(&ctr->timer, (uint64_t) (((l + 1) >> 1) * ctr->pit_const));
pitf_ctr_set_out(ctr, 1, pit);
ctr->thit = 0;
}
@@ -306,7 +306,7 @@ pitf_over(ctrf_t *ctr, void *priv)
if (ctr->disabled) {
ctr->count += 0xffff;
if (ctr->using_timer)
timer_advance_u64(&ctr->timer, (uint64_t) (0xffff * PITCONST));
timer_advance_u64(&ctr->timer, (uint64_t) (0xffff * ctr->pit_const));
return;
}
@@ -318,12 +318,12 @@ pitf_over(ctrf_t *ctr, void *priv)
ctr->thit = 1;
ctr->count += 0xffff;
if (ctr->using_timer)
timer_advance_u64(&ctr->timer, (uint64_t) (0xffff * PITCONST));
timer_advance_u64(&ctr->timer, (uint64_t) (0xffff * ctr->pit_const));
break;
case 2: /*Rate generator*/
ctr->count += l;
if (ctr->using_timer)
timer_advance_u64(&ctr->timer, (uint64_t) (l * PITCONST));
timer_advance_u64(&ctr->timer, (uint64_t) (l * ctr->pit_const));
pitf_ctr_set_out(ctr, 0, pit);
pitf_ctr_set_out(ctr, 1, pit);
break;
@@ -332,16 +332,16 @@ pitf_over(ctrf_t *ctr, void *priv)
pitf_ctr_set_out(ctr, 0, pit);
ctr->count += (l >> 1);
if (ctr->using_timer)
timer_advance_u64(&ctr->timer, (uint64_t) ((l >> 1) * PITCONST));
timer_advance_u64(&ctr->timer, (uint64_t) ((l >> 1) * ctr->pit_const));
} else {
pitf_ctr_set_out(ctr, 1, pit);
ctr->count += ((l + 1) >> 1);
if (ctr->using_timer)
timer_advance_u64(&ctr->timer, (uint64_t) (((l + 1) >> 1) * PITCONST));
timer_advance_u64(&ctr->timer, (uint64_t) (((l + 1) >> 1) * ctr->pit_const));
}
#if 0
if (!t)
pclog("pit_over: square wave mode c=%x %lli %f\n", pit.c[t], tsc, PITCONST);
pclog("pit_over: square wave mode c=%x %lli %f\n", pit.c[t], tsc, ctr->pit_const);
#endif
break;
case 4: /*Software triggered strove*/
@@ -353,12 +353,12 @@ pitf_over(ctrf_t *ctr, void *priv)
ctr->newcount = 0;
ctr->count += l;
if (ctr->using_timer)
timer_advance_u64(&ctr->timer, (uint64_t) (l * PITCONST));
timer_advance_u64(&ctr->timer, (uint64_t) (l * ctr->pit_const));
} else {
ctr->thit = 1;
ctr->count += 0xffff;
if (ctr->using_timer)
timer_advance_u64(&ctr->timer, (uint64_t) (0xffff * PITCONST));
timer_advance_u64(&ctr->timer, (uint64_t) (0xffff * ctr->pit_const));
}
break;
case 5: /*Hardware triggered strove*/
@@ -369,7 +369,7 @@ pitf_over(ctrf_t *ctr, void *priv)
ctr->thit = 1;
ctr->count += 0xffff;
if (ctr->using_timer)
timer_advance_u64(&ctr->timer, (uint64_t) (0xffff * PITCONST));
timer_advance_u64(&ctr->timer, (uint64_t) (0xffff * ctr->pit_const));
break;
default:
@@ -659,6 +659,24 @@ pitf_reset(pitf_t *dev)
dev->counters[2].gate = 0;
}
void
pitf_set_pit_const(void *data, uint64_t pit_const)
{
pitf_t *pit = (pitf_t *) data;
ctrf_t *ctr;
for (uint8_t i = 0; i < 3; i++) {
ctr = &pit->counters[i];
ctr->pit_const = pit_const;
}
}
static void
pitf_speed_changed(void *priv)
{
pitf_set_pit_const(priv, PITCONST);
}
static void
pitf_close(void *priv)
{
@@ -707,7 +725,7 @@ const device_t i8253_fast_device = {
.close = pitf_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = NULL,
.speed_changed = pitf_speed_changed,
.force_redraw = NULL,
.config = NULL
};
@@ -721,7 +739,7 @@ const device_t i8254_fast_device = {
.close = pitf_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = NULL,
.speed_changed = pitf_speed_changed,
.force_redraw = NULL,
.config = NULL
};
@@ -735,7 +753,7 @@ const device_t i8254_sec_fast_device = {
.close = pitf_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = NULL,
.speed_changed = pitf_speed_changed,
.force_redraw = NULL,
.config = NULL
};
@@ -763,7 +781,7 @@ const device_t i8254_ps2_fast_device = {
.close = pitf_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = NULL,
.speed_changed = pitf_speed_changed,
.force_redraw = NULL,
.config = NULL
};
@@ -777,5 +795,6 @@ const pit_intf_t pit_fast_intf = {
&pitf_ctr_set_out_func,
&pitf_ctr_set_load_func,
&pitf_ctr_clock,
&pitf_set_pit_const,
NULL,
};

28
src/sound/snd_pas16.c
View File

@@ -354,7 +354,6 @@ static void
pas16_out(uint16_t port, uint8_t val, void *priv)
{
pas16_t *pas16 = (pas16_t *) priv;
pit_t *pit = (pit_t *) pas16->pit;
pas16_log("pas16_out : port %04X val %02X %04X:%04X\n", port, val, CS, cpu_state.pc);
switch (port) {
case 0x388:
@@ -728,6 +727,28 @@ pas16_get_music_buffer(int32_t *buffer, int len, void *priv)
pas16->opl.reset_buffer(pas16->opl.priv);
}
static void
pas16_speed_changed(void *priv)
{
pas16_t *pas16 = (pas16_t *) priv;
/* TODO: In PAS16 mode:
pit_change_pas16_const(prescale);
pit_set_pit_const(pas16->pit, PAS16CONST);
*/
pit_set_pit_const(pas16->pit, PITCONST);
}
static void
pas16_reset(void *priv)
{
pas16_t *pas16 = (pas16_t *) priv;
/* TODO: Reset the entire PAS16 state here. */
pit_set_pit_const(pas16->pit, PITCONST);
}
static void *
pas16_init(UNUSED(const device_t *info))
{
@@ -743,6 +764,7 @@ pas16_init(UNUSED(const device_t *info))
sb_dsp_set_mpu(&pas16->dsp, pas16->mpu);
pas16->pit = device_add(&i8254_ext_io_device);
pit_set_pit_const(pas16->pit, PITCONST);
pas16->pit->dev_priv = pas16;
pas16->irq = 10;
pas16->dma = 3;
@@ -798,9 +820,9 @@ const device_t pas16_device = {
.local = 0,
.init = pas16_init,
.close = pas16_close,
.reset = NULL,
.reset = pas16_reset,
{ .available = NULL },
.speed_changed = NULL,
.speed_changed = pas16_speed_changed,
.force_redraw = NULL,
.config = pas16_config
};