#define PrintDebug(fmt, args...)
#endif
+
typedef enum {RESET, ICW1, ICW2, ICW3, ICW4, READY} pic_state_t;
static const uint_t MASTER_PORT1 = 0x20;
return 0;
}
+
+/*Zheng 07/30/2008*/
+
+static int pic_lower_intr(void *private_data, int irq_no) {
+
+ struct pic_internal *state = (struct pic_internal*)private_data;
+
+ PrintDebug("[pic_lower_intr] IRQ line %d now low\n", (unsigned) irq_no);
+ if (irq_no <= 7) {
+
+ state->master_irr &= ~(1 << irq_no);
+ if ((state->master_irr & ~(state->master_imr)) == 0) {
+ PrintDebug("\t\tFIXME: Master maybe should do sth\n");
+ }
+ } else if ((irq_no > 7) && (irq_no <= 15)) {
+
+ state->slave_irr &= ~(1 << (irq_no - 8));
+ if ((state->slave_irr & (~(state->slave_imr))) == 0) {
+ PrintDebug("\t\tFIXME: Slave maybe should do sth\n");
+ }
+ }
+ return 0;
+}
+
+
+
static int pic_intr_pending(void * private_data) {
struct pic_internal * state = (struct pic_internal*)private_data;
}
static int pic_get_intr_number(void * private_data) {
- struct pic_internal * state = (struct pic_internal*)private_data;
- int i=0;
- int irq=-1;
+ struct pic_internal * state = (struct pic_internal *)private_data;
+ int i = 0;
+ int irq = -1;
PrintDebug("8259 PIC: getnum: master_irr: 0x%x master_imr: 0x%x\n", i, state->master_irr, state->master_imr);
PrintDebug("8259 PIC: getnum: slave_irr: 0x%x slave_imr: 0x%x\n", i, state->slave_irr, state->slave_imr);
}
}
- if (i==15 || i==6) {
+ if ((i == 15) || (i == 6)) {
DumpPICState(state);
}
- if (i==16) {
+ if (i == 16) {
return -1;
} else {
return irq;
}
*/
+
+/*Zheng 07/30/2008*/
static struct intr_ctrl_ops intr_ops = {
.intr_pending = pic_intr_pending,
.get_intr_number = pic_get_intr_number,
.raise_intr = pic_raise_intr,
.begin_irq = pic_begin_irq,
+ .lower_intr = pic_lower_intr, //Zheng added
+
};