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[Qemu-devel] [PATCH v2 6/6] pci bridge: implement secondary bus reset
From: |
Isaku Yamahata |
Subject: |
[Qemu-devel] [PATCH v2 6/6] pci bridge: implement secondary bus reset |
Date: |
Fri, 19 Nov 2010 18:56:03 +0900 |
Emulates secondary bus reset when secondary bus reset bit
is written from 0 to 1.
Signed-off-by: Isaku Yamahata <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>
---
hw/pci_bridge.c | 12 +++++++++++-
1 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/hw/pci_bridge.c b/hw/pci_bridge.c
index 58cc2e4..618a81e 100644
--- a/hw/pci_bridge.c
+++ b/hw/pci_bridge.c
@@ -139,6 +139,10 @@ 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);
+ uint16_t bridge_control_new;
+
pci_default_write_config(d, address, val, len);
if (/* io base/limit */
@@ -147,9 +151,15 @@ 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);
}
+
+ bridge_control_new = pci_get_word(d->config + PCI_BRIDGE_CONTROL);
+ if (!(bridge_control & PCI_BRIDGE_CTL_BUS_RESET) &&
+ (bridge_control_new & PCI_BRIDGE_CTL_BUS_RESET)) {
+ /* 0 -> 1 */
+ pci_bus_reset(&s->sec_bus);
+ }
}
void pci_bridge_disable_base_limit(PCIDevice *dev)
--
1.7.1.1
- [Qemu-devel] [PATCH v2 0/6] qdev reset refactoring and pci bus reset, Isaku Yamahata, 2010/11/19
- [Qemu-devel] [PATCH v2 4/6] qdev: introduce a helper function which triggers reset from a given device, Isaku Yamahata, 2010/11/19
- [Qemu-devel] [PATCH v2 2/6] qdev: reset qdev along with qdev tree, Isaku Yamahata, 2010/11/19
- [Qemu-devel] [PATCH v2 6/6] pci bridge: implement secondary bus reset,
Isaku Yamahata <=
- [Qemu-devel] [PATCH v2 5/6] pci: make use of qdev reset frame work to pci bus reset., Isaku Yamahata, 2010/11/19
- [Qemu-devel] [PATCH v2 1/6] qbus: add functions to walk both devices and busses, Isaku Yamahata, 2010/11/19
- [Qemu-devel] [PATCH v2 3/6] qdev: introduce reset call back for qbus level, Isaku Yamahata, 2010/11/19
- [Qemu-devel] Re: [PATCH v2 0/6] qdev reset refactoring and pci bus reset, Michael S. Tsirkin, 2010/11/22