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PPC: e500: pci: Export slot2irq calculation

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We need the calculation method to get from a PCI slot ID to its respective
interrupt line twice. Once in the internal map function and once when
assembling the device tree.

So let's extract the calculation to a separate function that can be called
by both users.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2012-12-13 01:16:24 +01:00
parent 3bb7e02a97
commit 9e2c12988b
3 changed files with 15 additions and 2 deletions
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3
hw/ppce500_pci.c
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@ -19,6 +19,7 @@
#include "pci.h"
#include "pci_host.h"
#include "bswap.h"
#include "ppce500_pci.h"
#ifdef DEBUG_PCI
#define pci_debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
@ -256,7 +257,7 @@ static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
int devno = pci_dev->devfn >> 3;
int ret;
ret = (irq_num + devno) % 4;
ret = ppce500_pci_map_irq_slot(devno, irq_num);
pci_debug("%s: devfn %x irq %d -> %d devno:%x\n", __func__,
pci_dev->devfn, irq_num, ret, devno);