@@ -604,6 +604,45 @@ static void via_isa_request_i8259_irq(void *opaque, int irq, int level)
qemu_set_irq(s->cpu_intr, level);
}
+static unsigned via_isa_get_pci_irq(const ViaISAState *s, int irq_num)
+{
+ switch (irq_num) {
+ case 0:
+ return s->dev.config[0x55] >> 4;
+
+ case 1:
+ return s->dev.config[0x56] & 0xf;
+
+ case 2:
+ return s->dev.config[0x56] >> 4;
+
+ case 3:
+ return s->dev.config[0x57] >> 4;
+ }
+
+ return 0;
+}
+
+static void via_isa_set_pci_irq(void *opaque, int irq_num, int level)
+{
+ ViaISAState *s = opaque;
+ PCIBus *bus = pci_get_bus(&s->dev);
+ unsigned pic_irq = via_isa_get_pci_irq(s, irq_num);
+ int i, pic_level = 0;
+
+ assert(pic_irq < ISA_NUM_IRQS);
+
+ /* The PIC level is the logical OR of all the PCI irqs mapped to it. */
+ for (i = 0; i < PCI_NUM_PINS; i++) {
+ if (pic_irq == via_isa_get_pci_irq(s, i)) {
+ pic_level |= pci_bus_get_irq_level(bus, i);
+ }
+ }
+
+ /* Now we change the pic irq level according to the via irq mappings. */
+ qemu_set_irq(s->isa_irqs[pic_irq], pic_level);
+}
+
static void via_isa_realize(PCIDevice *d, Error **errp)
{
ViaISAState *s = VIA_ISA(d);
@@ -676,6 +715,8 @@ static void via_isa_realize(PCIDevice *d, Error **errp)
if (!qdev_realize(DEVICE(&s->mc97), BUS(pci_bus), errp)) {
return;
}
+
+ pci_bus_irqs(pci_bus, via_isa_set_pci_irq, s, PCI_NUM_PINS);
}
/* TYPE_VT82C686B_ISA */
The real VIA south bridges implement a PCI IRQ router which is configured by the BIOS or the OS. In order to respect these configurations, QEMU needs to implement it as well. Signed-off-by: Bernhard Beschow <shentey@gmail.com> --- hw/isa/vt82c686.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+)