From 3ae806189842c70cf47e041b3c498c65683e5a21 Mon Sep 17 00:00:00 2001 From: aliguori Date: Wed, 11 Feb 2009 15:19:46 +0000 Subject: qemu: add pci helper functions (Marcelo Tosatti) Add pci_find_bus/pci_find_device to be used by PCI hotplug. Signed-off-by: Marcelo Tosatti Signed-off-by: Anthony Liguori git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6592 c046a42c-6fe2-441c-8c8c-71466251a162 --- hw/pci.c | 20 ++++++++++++++++++++ hw/pci.h | 6 ++++++ 2 files changed, 26 insertions(+) (limited to 'hw') diff --git a/hw/pci.c b/hw/pci.c index 0e57d2190b..d0e16fe44f 100644 --- a/hw/pci.c +++ b/hw/pci.c @@ -711,6 +711,26 @@ static void pci_bridge_write_config(PCIDevice *d, pci_default_write_config(d, address, val, len); } +PCIBus *pci_find_bus(int bus_num) +{ + PCIBus *bus = first_bus; + + while (bus && bus->bus_num != bus_num) + bus = bus->next; + + return bus; +} + +PCIDevice *pci_find_device(int bus_num, int slot, int function) +{ + PCIBus *bus = pci_find_bus(bus_num); + + if (!bus) + return NULL; + + return bus->devices[PCI_DEVFN(slot, function)]; +} + PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint16_t vid, uint16_t did, pci_map_irq_fn map_irq, const char *name) { diff --git a/hw/pci.h b/hw/pci.h index edb0594924..255ba30818 100644 --- a/hw/pci.h +++ b/hw/pci.h @@ -8,6 +8,10 @@ extern target_phys_addr_t pci_mem_base; +#define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07)) +#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f) +#define PCI_FUNC(devfn) ((devfn) & 0x07) + /* Device classes and subclasses */ #define PCI_CLASS_STORAGE_SCSI 0x0100 @@ -222,6 +226,8 @@ void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len); uint32_t pci_data_read(void *opaque, uint32_t addr, int len); int pci_bus_num(PCIBus *s); void pci_for_each_device(int bus_num, void (*fn)(PCIDevice *d)); +PCIBus *pci_find_bus(int bus_num); +PCIDevice *pci_find_device(int bus_num, int slot, int function); void pci_info(void); PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint16_t vid, uint16_t did, -- cgit v1.2.3