Date: Wed, 19 Nov 2008 15:53:43 GMT From: John Baldwin <jhb@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 153215 for review Message-ID: <200811191553.mAJFrhtr018782@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=153215 Change 153215 by jhb@jhb_mutex on 2008/11/19 15:53:33 Flesh out notes. Affected files ... .. //depot/projects/multipass/notes#2 edit Differences ... ==== //depot/projects/multipass/notes#2 (text+ko) ==== @@ -1,8 +1,30 @@ -Todo list and general scribbles for 6.0 project to add multiple passes +Todo list and general scribbles for 8.0 project to add multiple passes to the new-bus layer. Pass Overview: -------------- +- BUS_PASS_DEFAULT (0) +- BUS_PASS_ROOT (1) (root0 driver) +- BUS_PASS_BUSSES (10) + - enumerate busses, bridges usually should be here +- BUS_PASS_CPUS (20) +- BUS_PASS_INTERRUPT_CONTROLLERS (30) +- BUS_PASS_TIMERS (40) +- will want to start up SMP and schedulers after this point before continuing + further, can clear cold as well then Milestones / Todo: ------------------ +- Add pass number to 'driver_module_data' and an EARLY_DRIVER_MODULE() that + takes an explicit pass number. DRIVER_MODULE() uses the default pass (0). +- May have to store pass number in driver link structure, so each attachment + has its own pass number. +- Will need to change device_probe() to ignore drivers with a pass of 0 or + > current pass number until pass number becomes 0. +- Will need a 'device_set_pass()' to raise the pass number for use with + sysinit. The last step is to set it to 0. Each time it will raise the + pass number for each valid pass until it gets to the new setting. +- Will need a list of drivers sorted on pass number (just 1 per pass number + is fine) to have an enumeration of pass numbers. +- Need a new 'bus_new_pass' called when the pass number is changed. Will + need a 'bus_generic_pass' which just does 'bus_generic_attach()'.
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