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xbox_pci: Map PCI device slots 0 & 1 to a corresponding IRQ nibble index

This commit is contained in:
haxar 2020-12-10 22:07:05 -08:00 committed by mborgerson
parent 25b8fa8433
commit aacae39aa0
1 changed files with 30 additions and 12 deletions
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42
hw/xbox/xbox_pci.c
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@ -80,17 +80,15 @@
static void xbox_lpc_set_irq(void *opaque, int pirq, int level)
{
XBOX_LPCState *lpc = opaque;
int pic_irq;
assert(pirq >= 0);
assert(pirq < XBOX_NUM_INT_IRQS + XBOX_NUM_PIRQS);
int pic_irq = 0;
if (pirq < XBOX_NUM_INT_IRQS) {
/* devices on the internal bus */
uint32_t routing = pci_get_long(lpc->dev.config + XBOX_LPC_INT_IRQ_ROUT);
pic_irq = (routing >> (pirq * 4)) & 0xF;
if (pic_irq == 0) {
return;
}
@ -109,17 +107,37 @@ static void xbox_lpc_set_irq(void *opaque, int pirq, int level)
static int xbox_lpc_map_irq(PCIDevice *pci_dev, int intx)
{
int slot = PCI_SLOT(pci_dev->devfn);
switch (slot) {
/* devices on the internal bus */
case 2: return 0; /* usb0 */
case 3: return 1; /* usb1 */
case 4: return 2; /* nic */
case 5: return 3; /* apu */
case 6: return 4; /* aci */
case 9: return 6; /* ide */
case 30: /* agp bridge -> PIRQC? */
return XBOX_NUM_INT_IRQS + 2;
/*
* Return the index of a nibble at LPC PCI config
* register XBOX_LPC_INT_IRQ_ROUT for the actual
* IRQ number of a given PCI device slot.
*
* This register is hardcoded on hardware as:
*
* 0x0e065491 @ XBOX_LPC_INT_IRQ_ROUT
*/
case 0: return 5; /* hostbridge, no IRQ */
case 1: return 7; /* lpc, smbus, no IRQ */
case 2: return 0; /* usb0, IRQ 1 */
case 3: return 1; /* usb1, IRQ 9 */
case 4: return 2; /* nic, IRQ 4 */
case 5: return 3; /* apu, IRQ 5 */
case 6: return 4; /* aci, IRQ 6 */
case 9: return 6; /* ide, IRQ 14 */
/* pirqs */
/*
* Return the index of a byte at LPC PCI config
* register XBOX_LPC_PIRQ_ROUT for the actual
* IRQ number of a given PCI device slot.
*
* This register is hardcoded on hardware as:
*
* 0x00031000 @ XBOX_LPC_PIRQ_ROUT
*/
case 30: return XBOX_NUM_INT_IRQS + 2; /* agp bridge -> PIRQC, IRQ 3 */
default:
/* don't actually know how this should work */
assert(false);