acpica: rework INTRNG interrupts

On arm64 (where INTRNG is enabled), the interrupts have to be mapped
with ACPI_BUS_MAP_INTR() before adding them as resources to devices.

The earlier code did the mapping before calling acpi_set_resource(),
which bypassed code that checked for PCI link interrupts.

To fix this, move the call to map interrupts into acpi_set_resource()
and that requires additional work to lookup interrupt properties.
The changes here are to:
 * extend acpi_lookup_irq_handler() to lookup an irq in the ACPI
   resources
 * create a helper function acpi_map_intr() which uses the updated
   acpi_lookup_irq_handler() to look up an irq, and then map it
   with ACPI_BUS_MAP_INTR()
 * use acpi_map_intr() in acpi_pcib_route_interrupt() to map
   pci link interrupts.

With these changes, we can drop the ifdefs in acpi_resource.c, and
we can also drop the call for mapping interrupts in generic_timer.c

Reviewed by:	andrew
Differential Revision:	https://reviews.freebsd.org/D17790

1 files changed, 7 insertions, 0 deletions

diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
index 45ebf2e9eae9..22aea63e609b 100644
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -1319,6 +1319,13 @@ acpi_set_resource(device_t dev, device_t child, int type, int rid,
     }
 #endif
 
+#ifdef INTRNG
+    /* map with default for now */
+    if (type == SYS_RES_IRQ)
+	start = (rman_res_t)acpi_map_intr(child, (u_int)start,
+			acpi_get_handle(child));
+#endif
+
     /* If the resource is already allocated, fail. */
     if (resource_list_busy(rl, type, rid))
 	return (EBUSY);