usr.sbin/bhyve/pci_irq.c

49  * Implement an 8 pin PCI interrupt router compatible with the router
75  * Returns true if this pin is enabled with a valid IRQ.  Setting the
77  * if the pin was disabled.
89 pirq_read(int pin)
92 	assert(pin > 0 && pin <= nitems(pirqs));
93 	return (pirqs[pin - 1].reg);
97 pirq_write(struct vmctx *ctx, int pin, uint8_t val)
101 	assert(pin > 0 && pin <= nitems(pirqs));
102 	pirq = &pirqs[pin - 1];
198 	int best_count, best_irq, best_pin, irq, pin;
202 	/* First, find the least-used PIRQ pin. */
205 	for (pin = 1; pin < nitems(pirqs); pin++) {
206 		if (pirqs[pin].use_count < best_count) {
207 			best_pin = pin;
208 			best_count = pirqs[pin].use_count;
213 	/* Second, route this pin to an IRQ. */
235 pirq_irq(int pin)
237 	assert(pin > 0 && pin <= nitems(pirqs));
238 	return (pirqs[pin - 1].reg & PIRQ_IRQ);
247 	int irq, pin;
289 	for (pin = 0; pin < nitems(pirqs); pin++) {
291 		dsdt_line("Device (LNK%c)", 'A' + pin);
294 		dsdt_line("  Name (_UID, 0x%02X)", pin + 1);
297 		dsdt_line("    If (PIRV (PIR%c))", 'A' + pin);
311 		dsdt_line("  Name (CB%02X, ResourceTemplate ()", pin + 1);
317 		    pin + 1, 'A' + pin);
320 		dsdt_line("    And (PIR%c, 0x%02X, Local0)", 'A' + pin,
324 		dsdt_line("      ShiftLeft (0x01, Local0, CIR%c)", 'A' + pin);
328 		dsdt_line("      Store (0x00, CIR%c)", 'A' + pin);
330 		dsdt_line("    Return (CB%02X)", pin + 1);
334 		dsdt_line("    Store (0x80, PIR%c)", 'A' + pin);
338 		dsdt_line("    CreateWordField (Arg0, 0x01, SIR%c)", 'A' + pin);
339 		dsdt_line("    FindSetRightBit (SIR%c, Local0)", 'A' + pin);
340 		dsdt_line("    Store (Decrement (Local0), PIR%c)", 'A' + pin);