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[Qemu-devel] [PATCH v2 8/8] pci bridge: implement secondary bus reset.
From: |
Isaku Yamahata |
Subject: |
[Qemu-devel] [PATCH v2 8/8] pci bridge: implement secondary bus reset. |
Date: |
Thu, 5 Aug 2010 11:09:05 +0900 |
implement secondary bus reset.
Signed-off-by: Isaku Yamahata <address@hidden>
---
hw/pci_bridge.c | 13 ++++++++++++-
1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/hw/pci_bridge.c b/hw/pci_bridge.c
index ab7ed6e..37710e9 100644
--- a/hw/pci_bridge.c
+++ b/hw/pci_bridge.c
@@ -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 */
--
1.7.1.1
- [Qemu-devel] [PATCH v2 0/8] qbus reset callback and implement pci bus reset, Isaku Yamahata, 2010/08/04
- [Qemu-devel] [PATCH v2 5/8] qdev: introduce bus reset callback and helper functions., Isaku Yamahata, 2010/08/04
- [Qemu-devel] [PATCH v2 3/8] pci: export pci_bus_reset() and pci_device_reset() for later use., Isaku Yamahata, 2010/08/04
- [Qemu-devel] [PATCH v2 7/8] pci: eliminate work around in pci_device_reset()., Isaku Yamahata, 2010/08/04
- [Qemu-devel] [PATCH v2 4/8] pci: make pci_device_reset() aware of qdev., Isaku Yamahata, 2010/08/04
- [Qemu-devel] [PATCH v2 6/8] pci: use qbus bus reset callback., Isaku Yamahata, 2010/08/04
- [Qemu-devel] [PATCH v2 1/8] apb: fix typo., Isaku Yamahata, 2010/08/04
- [Qemu-devel] [PATCH v2 2/8] qdev: export qdev_reset() for later use., Isaku Yamahata, 2010/08/04
- [Qemu-devel] [PATCH v2 8/8] pci bridge: implement secondary bus reset.,
Isaku Yamahata <=