Messages in this thread | | | Date | Fri, 28 Feb 2003 14:48:05 -0600 | From | Corey Minyard <> | Subject | Re: ACPI request/release generic address |
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Grover, Andrew wrote:
|>From: Jeff Garzik [mailto:jgarzik@pobox.com] |>Can you define a generic address? |> |>IIRC, ACPI needs some work in this area. |> |>If the "generic address" is host RAM, that's easy. |>If the generic address is PIO address, that's mostly easy. |>If the generic address is MMIO address, that takes a bit of care with |>mapping, and I'm not sure ACPI gets it right in these cases. | | |The Generic Address Structure (GAS) is basically a 64 bit address and a |type field. The type can be: | |System memory |System IO |PCI Config space |Embedded Controller |SMBus |Functional fixed hardware | |I don't think this will very easily handle a clean request/release API. |Corey, what is the specific table you are concerned with? At least with |the GASes ACPI uses internally, they point to resource regions already |marked as used via other means (e820 or _CRS, for example.)
This is for some IPMI (Intelligent Platform Management Interface) hardware. It's address is specified in an ACPI table.
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