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handle the case where several PCI irqs share the same PIC irq 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1433 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-05-13 23:08:13 +00:00
parent bc380d1719
commit 72cc6cfeef
1 changed files with 30 additions and 15 deletions
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45
hw/pci.c
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@ -498,6 +498,27 @@ static inline int pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
return (irq_num + slot_addend) & 3;
}
static inline int get_pci_irq_level(int irq_num)
{
int pic_level;
#if (PCI_IRQ_WORDS == 2)
pic_level = ((pci_irq_levels[irq_num][0] |
pci_irq_levels[irq_num][1]) != 0);
#else
{
int i;
pic_level = 0;
for(i = 0; i < PCI_IRQ_WORDS; i++) {
if (pci_irq_levels[irq_num][i]) {
pic_level = 1;
break;
}
}
}
#endif
return pic_level;
}
static void piix3_set_irq(PCIDevice *pci_dev, int irq_num, int level)
{
int irq_index, shift, pic_irq, pic_level;
@ -510,26 +531,20 @@ static void piix3_set_irq(PCIDevice *pci_dev, int irq_num, int level)
*p = (*p & ~(1 << shift)) | (level << shift);
/* now we change the pic irq level according to the piix irq mappings */
/* XXX: optimize */
pic_irq = piix3_state->dev.config[0x60 + irq_num];
if (pic_irq < 16) {
/* the pic level is the logical OR of all the PCI irqs mapped
to it */
pic_level = 0;
#if (PCI_IRQ_WORDS == 2)
pic_level = ((pci_irq_levels[irq_num][0] |
pci_irq_levels[irq_num][1]) != 0);
#else
{
int i;
pic_level = 0;
for(i = 0; i < PCI_IRQ_WORDS; i++) {
if (pci_irq_levels[irq_num][i]) {
pic_level = 1;
break;
}
}
}
#endif
if (pic_irq == piix3_state->dev.config[0x60])
pic_level |= get_pci_irq_level(0);
if (pic_irq == piix3_state->dev.config[0x61])
pic_level |= get_pci_irq_level(1);
if (pic_irq == piix3_state->dev.config[0x62])
pic_level |= get_pci_irq_level(2);
if (pic_irq == piix3_state->dev.config[0x63])
pic_level |= get_pci_irq_level(3);
pic_set_irq(pic_irq, pic_level);
}
}