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keyboard irq generation fix

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@778 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-04-29 22:23:55 +00:00
parent 0294ffb9c8
commit 6f51f6b593
1 changed files with 18 additions and 21 deletions
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39
hw/pckbd.c
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@ -111,12 +111,13 @@
#define KBD_QUEUE_SIZE 256
typedef struct {
uint8_t aux[KBD_QUEUE_SIZE];
uint8_t data[KBD_QUEUE_SIZE];
int rptr, wptr, count;
} KBDQueue;
typedef struct KBDState {
KBDQueue queues[2];
KBDQueue queue;
uint8_t write_cmd; /* if non zero, write data to port 60 is expected */
uint8_t status;
uint8_t mode;
@ -145,15 +146,15 @@ int reset_requested;
incorrect, but it avoids having to simulate exact delays */
static void kbd_update_irq(KBDState *s)
{
KBDQueue *q = &s->queue;
int irq12_level, irq1_level;
irq1_level = 0;
irq12_level = 0;
s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF);
if (s->queues[0].count != 0 ||
s->queues[1].count != 0) {
if (q->count != 0) {
s->status |= KBD_STAT_OBF;
if (s->queues[1].count != 0) {
if (q->aux[q->rptr]) {
s->status |= KBD_STAT_MOUSE_OBF;
if (s->mode & KBD_MODE_MOUSE_INT)
irq12_level = 1;
@ -169,7 +170,7 @@ static void kbd_update_irq(KBDState *s)
static void kbd_queue(KBDState *s, int b, int aux)
{
KBDQueue *q = &s->queues[aux];
KBDQueue *q = &s->queue;
#if defined(DEBUG_MOUSE) || defined(DEBUG_KBD)
if (aux)
@ -181,6 +182,7 @@ static void kbd_queue(KBDState *s, int b, int aux)
#endif
if (q->count >= KBD_QUEUE_SIZE)
return;
q->aux[q->wptr] = aux;
q->data[q->wptr] = b;
if (++q->wptr == KBD_QUEUE_SIZE)
q->wptr = 0;
@ -288,30 +290,28 @@ static uint32_t kbd_read_data(void *opaque, uint32_t addr)
{
KBDState *s = opaque;
KBDQueue *q;
int val, index;
int val, index, aux;
q = &s->queues[1]; /* first check AUX data */
if (q->count == 0)
q = &s->queues[0]; /* then check KBD data */
q = &s->queue;
if (q->count == 0) {
/* NOTE: if no data left, we return the last keyboard one
(needed for EMM386) */
/* XXX: need a timer to do things correctly */
q = &s->queues[0];
index = q->rptr - 1;
if (index < 0)
index = KBD_QUEUE_SIZE - 1;
val = q->data[index];
} else {
aux = q->aux[q->rptr];
val = q->data[q->rptr];
if (++q->rptr == KBD_QUEUE_SIZE)
q->rptr = 0;
q->count--;
/* reading deasserts IRQ */
if (q == &s->queues[0])
pic_set_irq(1, 0);
else
if (aux)
pic_set_irq(12, 0);
else
pic_set_irq(1, 0);
}
/* reassert IRQs if data left */
kbd_update_irq(s);
@ -452,7 +452,7 @@ void kbd_mouse_event(int dx, int dy, int dz, int buttons_state)
s->mouse_buttons = buttons_state;
if (!(s->mouse_status & MOUSE_STATUS_REMOTE) &&
(s->queues[1].count < (KBD_QUEUE_SIZE - 16))) {
(s->queue.count < (KBD_QUEUE_SIZE - 16))) {
for(;;) {
/* if not remote, send event. Multiple events are sent if
too big deltas */
@ -632,18 +632,15 @@ void kbd_write_data(void *opaque, uint32_t addr, uint32_t val)
void kbd_reset(KBDState *s)
{
KBDQueue *q;
int i;
s->kbd_write_cmd = -1;
s->mouse_write_cmd = -1;
s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT;
s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED;
for(i = 0; i < 2; i++) {
q = &s->queues[i];
q->rptr = 0;
q->wptr = 0;
q->count = 0;
}
q = &s->queue;
q->rptr = 0;
q->wptr = 0;
q->count = 0;
}
void kbd_init(void)