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Added a "pcistatus" command to KDL that prints and clears the PCI device status register.

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Also clear the status register during init.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25523 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Marcus Overhagen 2008-05-16 22:17:21 +00:00
parent 94a6647354
commit f5831806ff
2 changed files with 51 additions and 0 deletions
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49
src/add-ons/kernel/bus_managers/pci/pci.cpp
View File

@ -248,6 +248,13 @@ write_io(int argc, char **argv)
}
static int
pcistatus(int argc, char **argv)
{
sPCI->ClearDeviceStatus(NULL, true);
return 0;
}
// #pragma mark bus manager init/uninit
status_t
@ -282,6 +289,8 @@ pci_init(void)
sPCI->InitDomainData();
sPCI->InitBus();
add_debugger_command("pcistatus", &pcistatus, "dump and clear pci device status registers");
return B_OK;
}
@ -352,6 +361,7 @@ PCI::InitBus()
if (fRootBus) {
DiscoverBus(fRootBus);
RefreshDeviceInfo(fRootBus);
ClearDeviceStatus(fRootBus, false);
}
}
@ -650,6 +660,45 @@ PCI::FixupDevices(int domain, uint8 bus)
}
void
PCI::ClearDeviceStatus(PCIBus *bus, bool dumpStatus)
{
if (!bus) {
if (!fRootBus)
return;
bus = fRootBus;
}
for (PCIDev *dev = bus->child; dev; dev = dev->next) {
uint16 status = ReadPciConfig(dev->domain, dev->bus, dev->dev, dev->func, PCI_status, 2);
if (dumpStatus) {
kprintf("domain %u, bus %u, dev %2u, func %u, PCI device status 0x%04x\n",
dev->domain, dev->bus, dev->dev, dev->func, status);
if (status & (1 << 15))
kprintf(" Detected Parity Error\n");
if (status & (1 << 14))
kprintf(" Signalled System Error\n");
if (status & (1 << 13))
kprintf(" Received Master-Abort\n");
if (status & (1 << 12))
kprintf(" Received Target-Abort\n");
if (status & (1 << 11))
kprintf(" Signalled Target-Abort\n");
if (status & (1 << 8))
kprintf(" Master Data Parity Error\n");
}
WritePciConfig(dev->domain, dev->bus, dev->dev, dev->func, PCI_status, 2, status);
if (dev->child)
ClearDeviceStatus(dev->child, dumpStatus);
}
if (bus->next)
ClearDeviceStatus(bus->next, dumpStatus);
}
void
PCI::DiscoverBus(PCIBus *bus)
{

2
src/add-ons/kernel/bus_managers/pci/pci.h
View File

@ -83,6 +83,8 @@ class PCI {
status_t ResolveVirtualBus(uint8 virtualBus, int *domain, uint8 *bus);
void ClearDeviceStatus(PCIBus *bus, bool dumpStatus);
private:
void EnumerateBus(int domain, uint8 bus, uint8 *subordinate_bus = NULL);