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to PCI bridge can be read be evaluating the _BBN method of the host to PCI device. Unfortunately, there appear to be some lazy/ignorant/moronic/ whatever BIOS writers that return 0 for _BBN for all host to PCI bridges in the system. On a system with a single host to PCI bridge this is not a problem as the child bus of that single bridge will be bus 0 anyway. However, on systems with multiple host to PCI bridges and l/i/m/w BIOS writers this is a major problem resulting in all but the first host to PCI bridge failing to attach. So, this adds a workaround. If the _BBN of a host to PCI bridge is zero and pcib0 already exists and is not us, the we use _ADR to look up our PCI function and slot (we currently assume we are on bus 0) and use that to call host_pcib_get_busno() to try and extract our bus number from config registers on the host to PCI bridge device. If that fails, then we make an evil assumption that ACPI's _SB_ namespace lays out the host to PCI bridges in ascending order and use our pcib unit number as our bus number. Approved by: re |
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|---|---|---|
| .. | ||
| Osd | ||
| acpi_acad.c | ||
| acpi_battery.c | ||
| acpi_button.c | ||
| acpi_cmbat.c | ||
| acpi_cpu.c | ||
| acpi_ec.c | ||
| acpi_lid.c | ||
| acpi_pci_link.c | ||
| acpi_pci.c | ||
| acpi_pcib_acpi.c | ||
| acpi_pcib_pci.c | ||
| acpi_pcib.c | ||
| acpi_pcibvar.h | ||
| acpi_powerres.c | ||
| acpi_resource.c | ||
| acpi_thermal.c | ||
| acpi_timer.c | ||
| acpi.c | ||
| acpica_support.c | ||
| acpica_support.h | ||
| acpiio.h | ||
| acpivar.h | ||