[Qemu-devel] [PATCH 37/61] pci: add helper function for pci config write function to check address.

[Isaku Yamahata]

add helper function for pci config write function to check address.
Those function will be used later.

Signed-off-by: Isaku Yamahata <address@hidden>
---
 hw/pci.h |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/hw/pci.h b/hw/pci.h
index 5cd882c..26c15c5 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -406,6 +406,20 @@ pci_config_get_quad(PCIDevice *d, uint32_t addr)
     return pci_get_quad(&d->config[addr]);
 }
 
+static inline int pci_config_changed(uint32_t addr, uint32_t len,
+                              uint32_t base, uint32_t end)
+{
+    /* check if [addr, addr + len] intersects [base, end] */
+    return base <= addr + len && addr <= end;
+}
+
+static inline int pci_config_changed_with_size(uint32_t addr, uint32_t len,
+                                        uint32_t base, uint32_t size)
+{
+    /* check if [addr, addr + len] intersects [base, base + size] */
+    return base <= addr + len && addr <= base + size;
+}
+
 typedef int (*pci_qdev_initfn)(PCIDevice *dev);
 typedef struct {
     DeviceInfo qdev;
-- 
1.6.0.2