@@ -119,6 +119,9 @@ pcibus_t pci_bridge_get_limit(const PCIDevice *bridge, uint8_t type)
void pci_bridge_write_config(PCIDevice *d,
uint32_t address, uint32_t val, int len)
{
+ PCIBridge *s = container_of(d, PCIBridge, dev);
+ uint16_t bridge_control = pci_get_word(d->config + PCI_BRIDGE_CONTROL);
+
pci_default_write_config(d, address, val, len);
if (/* io base/limit */
@@ -127,9 +130,17 @@ void pci_bridge_write_config(PCIDevice *d,
/* memory base/limit, prefetchable base/limit and
io base/limit upper 16 */
ranges_overlap(address, len, PCI_MEMORY_BASE, 20)) {
- PCIBridge *s = container_of(d, PCIBridge, dev);
pci_bridge_update_mappings(&s->sec_bus);
}
+
+ if (ranges_overlap(address, len, PCI_BRIDGE_CONTROL, 2)) {
+ uint16_t new = pci_get_word(d->config + PCI_BRIDGE_CONTROL);
+ if (!(bridge_control & PCI_BRIDGE_CTL_BUS_RESET) &&
+ (new & PCI_BRIDGE_CTL_BUS_RESET)) {
+ /* 0 -> 1 */
+ pci_bus_reset(&s->sec_bus);
+ }
+ }
}
/* reset bridge specific configuration registers */
implement secondary bus reset. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> --- hw/pci_bridge.c | 13 ++++++++++++- 1 files changed, 12 insertions(+), 1 deletions(-)