Date: Mon, 14 Jul 2003 17:36:02 -0700 (PDT) From: Nate Lawson <nate@root.org> To: current@freebsd.org Cc: imp@bsdimp.com Subject: newbus questions Message-ID: <20030714173017.F18544@root.org>
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I'm working on ECDT support for ACPI and ran into a couple newbus-related questions. 1. I'm using the identify entry as a way to get called early on in the boot process. However, this does not happen before $PIR evaluation. How should I hook in a routine for pre-$PIR execution? 2. I need to call bus_alloc_resource() to get access to some io ports. However, calling BUS_READ_IVAR in the identify routine gets a bad pointer deref. So how do I get a handle to use for allocating the IO ports (first arg of bus_alloc_resource)? 3. It appears bus_alloc_resource() takes a range of values. If I know the exact value to use, I request it via "value, value" instead of "0, ~0". Is this correct? The framework for this code is in ec_identify() and ec_attach() in sys/dev/acpica/acpi_ec.c. Thanks, Nate
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