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+anything else." So any address space that is (1) not claimed by some +programming model for them other than "don't use these resources for +PNP0C02 "motherboard" devices are basically a catch-all. +the _CRS tells the OS and the driver where the device's registers are. +a specific _HID/_CID that tells the OS what driver to bind to it, and +If the OS is expected to manage an ACPI device, that device will have +and understood by the old OS a static table does not. +If a new table is defined, an old OS needs to operate correctly even +needs to know early in boot, before it can parse the ACPI namespace. +reserving address space! The static tables are for things the OS +Static tables like MCFG, HPET, ECDT, etc., are *not* mechanisms for +the OS can at least make sure no resources conflict with them. +because it means an old OS can work correctly even on a system with +even if it doesn't have a driver for the device. +the OS can read _CRS and figure out what resource is being consumed _CRS methods are like generalized PCI BARs: +This ACPI resource description is done via _CRS methods of devices in +mechanism (using config accesses to read and size the BARs). +and the OS can discover them via the standard PCI enumeration +because the resources they consume are inside the host bridge windows, +devices *below* the host bridge do not need to be described via ACPI, +devices, since the OS can't locate the host bridge by itself.
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+are forwarded to PCI by a PCI host bridge should be described via ACPI +*everything* that consumes address space unless there's another +The basic requirement is that the ACPI namespace should describe +++ -0,0 +1,136 ACPI considerations for PCI host bridges the Message Signaled Interrupts (MSI) Driver Guide HOWTO and FAQ.ĭiff -git a/Documentation/PCI/acpi-info.txt b/Documentation/PCI/acpi-info.txt + - info on how PCI host bridges are represented in ACPI To: linux-pci +Cc: linux-acpi, linux-kernel, linux-arm-kernel, linaro-acpiĪdd a writeup about how PCI host bridges should be described in ACPI ` (3 more replies) 0 siblings, 4 replies 19+ messages in threadįrom: Bjorn Helgaas 17:59 UTC ( / raw)
ACPI ATK0100 KERNEL MODE DRIVER WIN7 ARCHIVE
PCI: Add information about describing PCI in ACPI LKML Archive on help / color / mirror / Atom feed * PCI: Add information about describing PCI in ACPI 17:59 Bjorn Helgaas