CVS commit: src/sys/arch

["Cherry G. Mathew" <cherry%netbsd.org@localhost>]

Module Name:    src
Committed By:   cherry
Date:           Sat Dec 22 07:45:59 UTC 2018

Modified Files:
        src/sys/arch/amd64/amd64: amd64_mainbus.c
        src/sys/arch/amd64/conf: XEN3_DOM0 files.amd64
        src/sys/arch/i386/conf: XEN3PAE_DOM0 files.i386
        src/sys/arch/i386/i386: i386_mainbus.c
        src/sys/arch/x86/include: autoconf.h
        src/sys/arch/xen/conf: files.xen
        src/sys/arch/xen/x86: autoconf.c xen_mainbus.c
Added Files:
        src/sys/arch/x86/x86: mainbus.c

Log Message:
This change modifies the mainbus(4) entry point for all x86 sub-archs
in the following way:

i) It provides a unified entry point in
   x86/x86/mainbus.c:mainbus_attach()
ii) It carves out the preliminary bus attachment sequence that is
   common to all sub-archs into
   x86/x86/mainbus.c: x86_cpubus_attach()
iii) It consolidates the remaining pathways as internal callee
   functions so that these may be called piecemeal if required. A
   special usecase of this is XEN PVHVM which may need to call the
   native configure path, the xen configure path, or both.
iv) It moves the driver private data structures from
   i386/i386_mainbus.c to an x86/ level one. This allows for other
   sub-arch's to do similar, if needed. (They do not at the moment).
v) For dom0 kernels, it enables 'acpi0 at mainbus?' and
   'acpi0 at hypervisorbus'. This serves two purposes:
   a) To demonstrate the possibility of dynamic configuration tree
      traversal ordering changes.
   b) To allow for the common acpi_check(self, "acpibus") call in
   x86/mainbus.c to not barf when it is called from the dom0 attach
   path. We allow for the acpi0 device to be a child of mainbus with
   the changes to amd64/conf/XEN3_DOM0 and i386/conf/XEN3PAE_DOM0
   without actually probing further in the code. This path will later
   be pursued in a PVHVM boot codepath.

There should be no operative changes with this change. If there are,
please complain loudly.


To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/sys/arch/amd64/amd64/amd64_mainbus.c
cvs rdiff -u -r1.160 -r1.161 src/sys/arch/amd64/conf/XEN3_DOM0
cvs rdiff -u -r1.109 -r1.110 src/sys/arch/amd64/conf/files.amd64
cvs rdiff -u -r1.9 -r1.10 src/sys/arch/i386/conf/XEN3PAE_DOM0
cvs rdiff -u -r1.398 -r1.399 src/sys/arch/i386/conf/files.i386
cvs rdiff -u -r1.2 -r1.3 src/sys/arch/i386/i386/i386_mainbus.c
cvs rdiff -u -r1.4 -r1.5 src/sys/arch/x86/include/autoconf.h
cvs rdiff -u -r0 -r1.1 src/sys/arch/x86/x86/mainbus.c
cvs rdiff -u -r1.171 -r1.172 src/sys/arch/xen/conf/files.xen
cvs rdiff -u -r1.20 -r1.21 src/sys/arch/xen/x86/autoconf.c
cvs rdiff -u -r1.2 -r1.3 src/sys/arch/xen/x86/xen_mainbus.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.