qemu/pci: helper routines for pci access

Add inline routines for convenient access to pci devices
with correct (little) endianness. Will be used by MSI-X support.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/pci.h

@@ -214,22 +214,46 @@ void pci_info(Monitor *mon);
 PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint16_t vid, uint16_t did,
                         pci_map_irq_fn map_irq, const char *name);
 
+static inline void
+pci_set_word(uint8_t *config, uint16_t val)
+{
+    cpu_to_le16wu((uint16_t *)config, val);
+}
+
+static inline uint16_t
+pci_get_word(uint8_t *config)
+{
+    return le16_to_cpupu((uint16_t *)config);
+}
+
+static inline void
+pci_set_long(uint8_t *config, uint32_t val)
+{
+    cpu_to_le32wu((uint32_t *)config, val);
+}
+
+static inline uint32_t
+pci_get_long(uint8_t *config)
+{
+    return le32_to_cpupu((uint32_t *)config);
+}
+
 static inline void
 pci_config_set_vendor_id(uint8_t *pci_config, uint16_t val)
 {
-    cpu_to_le16wu((uint16_t *)&pci_config[PCI_VENDOR_ID], val);
+    pci_set_word(&pci_config[PCI_VENDOR_ID], val);
 }
 
 static inline void
 pci_config_set_device_id(uint8_t *pci_config, uint16_t val)
 {
-    cpu_to_le16wu((uint16_t *)&pci_config[PCI_DEVICE_ID], val);
+    pci_set_word(&pci_config[PCI_DEVICE_ID], val);
 }
 
 static inline void
 pci_config_set_class(uint8_t *pci_config, uint16_t val)
 {
-    cpu_to_le16wu((uint16_t *)&pci_config[PCI_CLASS_DEVICE], val);
+    pci_set_word(&pci_config[PCI_CLASS_DEVICE], val);
 }
 
 typedef void (*pci_qdev_initfn)(PCIDevice *dev);