diff options
| author | David S. Miller <davem@davemloft.net> | 2006-06-20 01:22:35 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-06-20 01:22:35 -0700 |
| commit | 8047e247c899f80c33a23ad7e9e250224f0d26a5 (patch) | |
| tree | 253a7ba3c902730928214df5c2b5630d7875cc11 /arch/sparc64/kernel/pci_psycho.c | |
| parent | 37cdcd9e82108f9b899f1631f66ade2e45738a6e (diff) | |
[SPARC64]: Virtualize IRQ numbers.
Inspired by PowerPC XICS interrupt support code.
All IRQs are virtualized in order to keep NR_IRQS from needing
to be too large. Interrupts on sparc64 are arbitrary 11-bit
values, but we don't need to define NR_IRQS to 2048 if we
virtualize the IRQs.
As PCI and SBUS controller drivers build device IRQs, we divy
out virtual IRQ numbers incrementally starting at 1. Zero is
a special virtual IRQ used for the timer interrupt.
So device drivers all see virtual IRQs, and all the normal
interfaces such as request_irq(), enable_irq(), etc. translate
that into a real IRQ number in order to configure the IRQ.
At this point knowledge of the struct ino_bucket is almost
entirely contained within arch/sparc64/kernel/irq.c There are
a few small bits in the PCI controller drivers that need to
be swept away before we can remove ino_bucket's definition
out of asm-sparc64/irq.h and privately into kernel/irq.c
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/pci_psycho.c')
| -rw-r--r-- | arch/sparc64/kernel/pci_psycho.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/sparc64/kernel/pci_psycho.c b/arch/sparc64/kernel/pci_psycho.c index 5743e1316a93..f2d1097f541d 100644 --- a/arch/sparc64/kernel/pci_psycho.c +++ b/arch/sparc64/kernel/pci_psycho.c @@ -280,7 +280,6 @@ static unsigned int psycho_irq_build(struct pci_pbm_info *pbm, struct pci_dev *pdev, unsigned int ino) { - struct ino_bucket *bucket; unsigned long imap, iclr; unsigned long imap_off, iclr_off; int inofixup = 0; @@ -309,10 +308,7 @@ static unsigned int psycho_irq_build(struct pci_pbm_info *pbm, if ((ino & 0x20) == 0) inofixup = ino & 0x03; - bucket = __bucket(build_irq(inofixup, iclr, imap)); - bucket->flags |= IBF_PCI; - - return __irq(bucket); + return build_irq(inofixup, iclr, imap, IBF_PCI); } /* PSYCHO error handling support. */ |