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[Qemu-devel] [PATCH 03/25] pci: introduce pci_swizzle_map_irq_fn() for s
From: |
Jason Baron |
Subject: |
[Qemu-devel] [PATCH 03/25] pci: introduce pci_swizzle_map_irq_fn() for standardized interrupt pin swizzle |
Date: |
Thu, 13 Sep 2012 16:12:37 -0400 |
From: Isaku Yamahata <address@hidden>
Introduce pci_swizzle_map_irq_fn() for interrupt pin swizzle which is
standardized. PCI bridge swizzle is common logic, by introducing
this function duplicated swizzle logic will be avoided later.
Signed-off-by: Isaku Yamahata <address@hidden>
Signed-off-by: Jason Baron <address@hidden>
---
hw/pci.c | 18 ++++++++++++++++++
hw/pci.h | 2 ++
2 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/hw/pci.c b/hw/pci.c
index 1c847c5..55e4ad3 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -1121,6 +1121,24 @@ void pci_device_set_intx_routing_notifier(PCIDevice *dev,
dev->intx_routing_notifier = notifier;
}
+/*
+ * PCI-to-PCI bridge specification
+ * 9.1: Interrupt routing. Table 9-1
+ *
+ * the PCI Express Base Specification, Revision 2.1
+ * 2.2.8.1: INTx interrutp signaling - Rules
+ * the Implementation Note
+ * Table 2-20
+ */
+/*
+ * 0 <= pin <= 3 0 = INTA, 1 = INTB, 2 = INTC, 3 = INTD
+ * 0-origin unlike PCI interrupt pin register.
+ */
+int pci_swizzle_map_irq_fn(void *opaque, PCIDevice *pci_dev, int pin)
+{
+ return (pin + PCI_SLOT(pci_dev->devfn)) % PCI_NUM_PINS;
+}
+
/***********************************************************/
/* monitor info on PCI */
diff --git a/hw/pci.h b/hw/pci.h
index 26dc522..47ae740 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -316,6 +316,8 @@ void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq,
pci_map_irq_fn map_irq,
void *irq_opaque, int nirq);
int pci_bus_get_irq_level(PCIBus *bus, int irq_num);
void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug, DeviceState *dev);
+/* 0 <= pin <= 3 0 = INTA, 1 = INTB, 2 = INTC, 3 = INTD */
+int pci_swizzle_map_irq_fn(void *opaque, PCIDevice *pci_dev, int pin);
PCIBus *pci_register_bus(DeviceState *parent, const char *name,
pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
void *irq_opaque,
--
1.7.1
- [Qemu-devel] [PATCH 00/25] q35 series take #1, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 02/25] pci: add opaque argument to pci_map_irq_fn, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 08/25] pci_ids: add intel 82801BA pci-to-pci bridge id and PCI_CLASS_SERIAL_SMBUS, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 07/25] pc/piix_pci: factor out smram/pam logic, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 10/25] pcie: Convert PCIExpressHost to use the QOM., Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 06/25] pc: Move ioapic_init() from pc_piix.c to pc.c, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 13/25] q35: Suppress SMM BIOS initialization under KVM, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 03/25] pci: introduce pci_swizzle_map_irq_fn() for standardized interrupt pin swizzle,
Jason Baron <=
- [Qemu-devel] [PATCH 04/25] ahci: add ide device initialization helper, Jason Baron, 2012/09/13
- Re: [Qemu-devel] [PATCH 04/25] ahci: add ide device initialization helper, Markus Armbruster, 2012/09/21
- Re: [Qemu-devel] [PATCH 04/25] ahci: add ide device initialization helper, Jason Baron, 2012/09/21
- Re: [Qemu-devel] [PATCH 04/25] ahci: add ide device initialization helper, Markus Armbruster, 2012/09/24
- Re: [Qemu-devel] [PATCH 04/25] ahci: add ide device initialization helper, Jason Baron, 2012/09/24
- Re: [Qemu-devel] [PATCH 04/25] ahci: add ide device initialization helper, Markus Armbruster, 2012/09/26
- Re: [Qemu-devel] [PATCH 04/25] ahci: add ide device initialization helper, Kevin Wolf, 2012/09/26
- Re: [Qemu-devel] [PATCH 04/25] ahci: add ide device initialization helper, Jason Baron, 2012/09/27
[Qemu-devel] [PATCH 15/25] q35: smbus: Remove PCI_STATUS_SIG_SYSTEM_ERROR and PCI_STATUS_DETECTED_PARITY from w1cmask, Jason Baron, 2012/09/13
[Qemu-devel] [PATCH 09/25] pcie: pass pcie window size to pcie_host_mmcfg_update(), Jason Baron, 2012/09/13