So after several versions of silence, mips-sources returns to life with the introduction of an ebuild for 2.6.20.6. This release contains an enhancement for IP22's scsi driver which may help boost speed. It also alters IP32's build methology again -- CONFIG_BUILD_ELF64 is now dead and removed from Kconfig, however the vmlinux.32 target will still be used, and a new revision of the squashfs patch has been added. The only downside is IP28 support has been disabled until new patches for it are available. Forward porting the existing patches is improbable due to changes from using CPHYSADDR to a new __pa() macro. IP27 support is untested, but assumed to work until determined otherwise (due to a lack of hardware).

(Portage version: 2.1.2.3)

3 files changed, 558 insertions, 2 deletions

diff --git a/sys-kernel/mips-sources/ChangeLog b/sys-kernel/mips-sources/ChangeLog
index d17c5714cbe3..94a75164d0b5 100644
--- a/sys-kernel/mips-sources/ChangeLog
+++ b/sys-kernel/mips-sources/ChangeLog
@@ -1,6 +1,21 @@
 # ChangeLog for sys-kernel/mips-sources
-# Copyright 2002-2006 Gentoo Foundation; Distributed under the GPL v2
-# $Header: /var/cvsroot/gentoo-x86/sys-kernel/mips-sources/ChangeLog,v 1.102 2006/09/05 17:16:09 kumba Exp $
+# Copyright 2002-2007 Gentoo Foundation; Distributed under the GPL v2
+# $Header: /var/cvsroot/gentoo-x86/sys-kernel/mips-sources/ChangeLog,v 1.103 2007/04/07 07:21:01 kumba Exp $
+
+*mips-sources-2.6.20.6 (10 Apr 2007)
+
+  10 Apr 2007; Joshua Kinard <kumba@gentoo.org>
+  +mips-sources-2.6.20.6.ebuild:
+  So after several versions of silence, mips-sources returns to life with the
+  introduction of an ebuild for 2.6.20.6. This release contains an enhancement
+  for IP22's scsi driver which may help boost speed. It also alters IP32's
+  build methology again -- CONFIG_BUILD_ELF64 is now dead and removed from
+  Kconfig, however the vmlinux.32 target will still be used, and a new
+  revision of the squashfs patch has been added. The only downside is IP28
+  support has been disabled until new patches for it are available. Forward
+  porting the existing patches is improbable due to changes from using
+  CPHYSADDR to a new __pa() macro. IP27 support is untested, but assumed to
+  work until determined otherwise (due to a lack of hardware).
 
   05 Sep 2006; Joshua Kinard <kumba@gentoo.org>
   -mips-sources-2.6.15.7-r2.ebuild, mips-sources-2.6.16.27.ebuild,
diff --git a/sys-kernel/mips-sources/files/digest-mips-sources-2.6.20.6 b/sys-kernel/mips-sources/files/digest-mips-sources-2.6.20.6
new file mode 100644
index 000000000000..ad6e5da29078
--- /dev/null
+++ b/sys-kernel/mips-sources/files/digest-mips-sources-2.6.20.6
@@ -0,0 +1,12 @@
+MD5 34b0f354819217e6a345f48ebbd8f13e linux-2.6.20.tar.bz2 43375937
+RMD160 14657ade7be4363143dbd5593f5710d21eda7a03 linux-2.6.20.tar.bz2 43375937
+SHA256 2c14ada1ac7d272e03b430d3a530d60fc9ec69cc8252382aa049afba7d2b8558 linux-2.6.20.tar.bz2 43375937
+MD5 61a85b191d48ab686aa3e63311e4d3bf mips-sources-generic_patches-1.26.tar.bz2 578158
+RMD160 bfb4d35a7144b10d4775a098668265f343ddfdd7 mips-sources-generic_patches-1.26.tar.bz2 578158
+SHA256 bbc32da66c369f7f467a3ebcd0de0f5d2a7bd941cb69d43da56976c0ee1581c1 mips-sources-generic_patches-1.26.tar.bz2 578158
+MD5 40cac98ee50c1f92f1b6890ae2540a4e mipsgit-2.6.20-20070317.diff.bz2 86446
+RMD160 85b9c02fa410a1564aadb31828e7de4bcdea1f25 mipsgit-2.6.20-20070317.diff.bz2 86446
+SHA256 27fbd85f7832913dd94532d8d475ab6e5cc7c4091ec41cfa21ebc85b3f0dc7e7 mipsgit-2.6.20-20070317.diff.bz2 86446
+MD5 a42300de8720552d70470dd3e4afc75f patch-2.6.20.6.bz2 69390
+RMD160 890c545794fea21c13a0886fd2ccbca4a8cc9e0b patch-2.6.20.6.bz2 69390
+SHA256 808ca62a66d7cfe40123301c2f51fc0dcd817ee3bb0df96d1e9e97cc3bad6a9c patch-2.6.20.6.bz2 69390
diff --git a/sys-kernel/mips-sources/mips-sources-2.6.20.6.ebuild b/sys-kernel/mips-sources/mips-sources-2.6.20.6.ebuild
new file mode 100644
index 000000000000..3f5154ba1714
--- /dev/null
+++ b/sys-kernel/mips-sources/mips-sources-2.6.20.6.ebuild
@@ -0,0 +1,529 @@
+# Copyright 1999-2007 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/sys-kernel/mips-sources/mips-sources-2.6.20.6.ebuild,v 1.1 2007/04/07 07:21:01 kumba Exp $
+
+
+# INCLUDED:
+# 1) linux sources from kernel.org
+# 2) linux-mips.org GIT snapshot diff from 14 Sep 2005
+# 3) Generic Fixes
+# 4) Security fixes
+# 5) Patch for IP30 Support			(http://www.linux-mips.org/~skylark/)
+# 5) Patch for IP28 Support			(http://home.alphastar.de/fuerst/download.html)
+# 6) Patch for Remaining Cobalt Bits		(http://www.colonel-panic.org/cobalt-mips/)
+# 7) Experimental patches (IP27 hacks, et al)
+
+
+#//------------------------------------------------------------------------------
+
+
+
+# Version Data
+OKV=${PV/_/-}
+GITDATE="20070317"			# Date of diff between kernel.org and lmo GIT
+GENPATCHVER="1.26"			# Tarball version for generic patches
+EXTRAVERSION="-mipsgit-${GITDATE}"
+KV="${OKV}${EXTRAVERSION}"
+F_KV="${OKV}"				# Fetch KV, used to know what mipsgit diff to grab.
+STABLEVER="${F_KV}"			# Stable Version (2.6.x)
+PATCHVER=""
+
+# Directories
+S="${WORKDIR}/linux-${OKV}-${GITDATE}"
+MIPS_PATCHES="${WORKDIR}/mips-patches"
+MIPS_SECURITY="${WORKDIR}/security"
+
+# Inherit Eclasses
+ETYPE="sources"
+inherit kernel eutils versionator
+
+# Portage Vars
+HOMEPAGE="http://www.linux-mips.org/ http://www.gentoo.org/"
+SLOT="${OKV}"
+PROVIDE="virtual/linux-sources virtual/alsa"
+KEYWORDS="-* ~mips"
+IUSE="cobalt ip27 ip28 ip30 ip32r10k"
+DEPEND=">=sys-devel/gcc-4.1.1"
+
+
+# Version Control Variables
+USE_RC="no"				# If set to "yes", then attempt to use an RC kernel
+USE_PNT="yes"				# If set to "yes", then attempt to use a point-release (2.6.x.y)
+
+# Machine Support Control Variables
+DO_IP22="yes"				# If "yes", enable IP22 support		(SGI Indy, Indigo2 R4x00)
+DO_IP27="yes"				# 		   IP27 support		(SGI Origin)
+DO_IP28="no"				# 		   IP28 support		(SGI Indigo2 Impact R10000)
+DO_IP30="yes"				# 		   IP30 support		(SGI Octane)
+DO_IP32="yes"				# 		   IP32 support		(SGI O2, R5000/RM5200 Only)
+DO_CBLT="yes"				# 		   Cobalt Support	(Cobalt Microsystems)
+
+# Machine Stable Version Variables 
+SV_IP22=""				# If set && DO_IP22 == "no", indicates last "good" IP22 version
+SV_IP27=""				# 	    DO_IP27 == "no", 			   IP27
+SV_IP28="2.6.17.10"			# 	    DO_IP28 == "no", 			   IP28
+SV_IP30=""				# 	    DO_IP30 == "no", 			   IP30
+SV_IP32=""				# 	    DO_IP32 == "no", 			   IP32
+SV_CBLT=""				# 	    DO_CBLT == "no", 			   Cobalt
+
+
+# If USE_RC == "yes", use a release candidate kernel (2.6.X-rcY)
+if [ "${USE_RC}" = "yes" ]; then
+	KVXY="$(get_version_component_range 1-2)"			# Kernel Major/Minor
+	KVZ="$(get_version_component_range 3)"				# Kernel Revision Pt. 1
+	KVRC="$(get_version_component_range 4)"				# Kernel RC
+	F_KV="$(get_version_component_range 1-3)-${KVRC}"
+	STABLEVER="${KVXY}.$((${KVZ} - 1))"				# Last stable version (Rev - 1)
+	PATCHVER="mirror://kernel/linux/kernel/v2.6/testing/patch-${OKV}.bz2"
+	EXTRAVERSION="-${KVRC}-mipsgit-${GITDATE}"
+	KV="${OKV}-${EXTRAVERSION}"
+	USE_PNT="no"
+fi
+
+# If USE_PNT == "yes", use a point release kernel (2.6.x.y)
+if [ "${USE_PNT}" = "yes" ]; then
+	F_KV="$(get_version_component_range 1-3)"			# Get Maj/Min/Rev (x.y.z)
+	STABLEVER="${F_KV}"						# Last Revision release
+	PATCHVER="mirror://kernel/linux/kernel/v2.6/patch-${OKV}.bz2"	# Patch for new point release
+	EXTRAVERSION=".$(get_version_component_range 4)-mipsgit-${GITDATE}"
+	KV="${OKV}${EXTRAVERSION}"
+	USE_RC="no"
+fi
+
+
+DESCRIPTION="Linux-Mips GIT sources for MIPS-based machines, dated ${GITDATE}"
+SRC_URI="mirror://kernel/linux/kernel/v2.6/linux-${STABLEVER}.tar.bz2
+		mirror://gentoo/mipsgit-${F_KV}-${GITDATE}.diff.bz2
+		mirror://gentoo/${PN}-generic_patches-${GENPATCHVER}.tar.bz2
+		${PATCHVER}"
+
+
+
+#//------------------------------------------------------------------------------
+
+
+
+# Error messages
+err_only_one_mach_allowed() {
+	echo -e ""
+	eerror "A patchset for a specific machine-type has already been selected."
+	eerror "No other patches for machines-types are permitted.  You will need a"
+	eerror "separate copy of the kernel sources for each different machine-type"
+	eerror "you want to build a kernel for."
+	die "Only one machine-type patchset allowed"
+}
+
+err_disabled_mach() {
+	# Get args
+	local mach_name="${1}"
+	local mach_abbr="${2}"
+	local mach_use="${3}"
+
+	# Get stable version, if exists
+	local stable_ver="SV_${mach_abbr}"
+	stable_ver="${!stable_ver}"
+
+	# See if this machine needs a USE passed or skip dying
+	local has_use
+	[ ! -z "${mach_use}" -a "${mach_use}" != "skip" ] && has_use="USE=\"${mach_use}\" "
+
+	# Print error && (maybe) die
+	echo -e ""
+	eerror "${mach_name} Support has been disabled in this ebuild"
+	eerror "revision.  If you wish to merge ${mach_name} sources, then"
+	eerror "run ${has_use}emerge =mips-sources-${stable_ver}"
+	[ "${mach_use}" != "skip" ] && die "${mach_name} Support disabled."
+
+	return 0
+}
+
+
+
+#//------------------------------------------------------------------------------
+
+
+
+# Machine Information Messages
+#
+# If needing to whitespace for formatting in 'einfo', 'ewarn', or 'eerror', use
+# \040 for a space instead of the standard space.  These functions strip redundant
+# white space for some unknown reason
+
+show_ip22_info() {
+	echo -e ""
+	einfo "IP22 systems should work well with this release, however, R4600"
+	einfo "setups may still experience bugs.  Please report any encountered"
+	einfo "problems."
+	einfo ""
+	einfo "Some Notes:"
+	einfo "\t- Supported graphics card right now is Newport (XL)."
+	einfo "\t- A driver for Extreme (XZ) is in the works, but remains"
+	einfo "\t\040\040unreleased by its author for public consumption."
+	echo -e ""
+}
+
+show_ip27_info() {
+	echo -e ""
+	einfo "IP27 support can be considered a game of Russian Roulette.  It'll work"
+	einfo "great for some but not for others.  It also uses some rather horrible"
+	einfo "hacks to get going -- hopefully these will be repaired in the future."
+	echo -e ""
+	ewarn "Please keep all kittens and any other small, cute, and fluffy creatures"
+	ewarn "away from an IP27 Box running these sources.  Failure to do so may cause"
+	ewarn "the IP27 to consume the hapless creature.  Consider this your only"
+	ewarn "warning regarding the experimental nature of this particular machine."
+	echo -e ""
+}
+
+show_ip28_info() {
+	echo -e ""
+	einfo "Support for the Indigo2 Impact R10000 is very experimental.  If you do not"
+	einfo "have a clue in the world about what an IP28 is, what the mips architecture"
+	einfo "is about, or are new to Gentoo, then it is highly advised that you steer"
+	einfo "clear of messing with this machine.  Due to the experimental nature of this"
+	einfo "particular class of system, we have to provide such warnings, as it is only"
+	einfo "for use by those who know what they are doing."
+	echo -e ""
+	einfo "Be advised that attempting to run Gentoo/Linux (or any Linux distro) on this"
+	einfo "system may cause the sudden, unexplained disappearence of any nearby furry"
+	einfo "creatures.  So please keep any and all small pets away from this system at"
+	einfo "all times."
+	echo -e ""
+	ewarn "That said, support for this system REQUIRES that you use the ip28 cascade"
+	ewarn "profile (${HILITE}default-linux/mips/2006.1/ip28/o32${NORMAL}), because a very special"
+	ewarn "patch is used on the kernel-gcc (${GOOD}gcc-mips64${NORMAL}) and the kernel itself"
+	ewarn "in order to support this machine.  These patches will only be applied"
+	ewarn "if \"ip28\" is defined in USE, which the profile sets.  As of gcc-4.1.1,"
+	ewarn "this patch is automatically applied.  In time, ${HILITE}kgcc64${NORMAL} will replace ${GOOD}gcc-mips64${NORMAL}"
+	echo -e ""
+	ewarn "As a final warning, _nothing_ is guaranteed to work smoothly.  However,"
+	ewarn "the Impact console driver and X driver do work somewhat decently."
+	echo -e ""
+}
+
+show_ip30_info() {
+	echo -e ""
+	einfo "Things to keep in mind when building a kernel for an SGI Octane:"
+	einfo "\t- Impact (MGRAS) console and X driver work, please report any bugs."
+	einfo "\t- VPro (Odyssey) console works, but no X driver exists yet."
+	einfo "\t- PCI Card Cages should work for many devices, except certain types like"
+	einfo "\t\040\040PCI-to-PCI bridges (USB hubs, USB flash card readers for example)."
+	einfo "\t- Do not use OHCI-based USB cards in Octane.  They're broke on this machine."
+	einfo "\t\040\040Patches are welcome to fix the issue."
+	einfo "\t- Equally, UHCI Cards are showing issues in this release, but should still"
+	einfo "\t\040\040function somewhat.  This issue manifests itself when using pl2303 USB->Serial"
+	einfo "\t\040\040adapters."
+	einfo "\t- Other XIO-based devices like MENET and various Impact addons remain"
+	einfo "\t\040\040untested and are not guaranteed to work.  This applies to various"
+	einfo "\t\040\040digital video conversion boards as well."
+	echo -e ""
+}
+
+show_ip32_info() {
+	echo -e ""
+	einfo "IP32 systems function well, however there are some notes:"
+	einfo "\t- No driver exists yet for the sound card."
+	einfo "\t- Framebuffer console is limited to 4MB.  Anything greater"
+	einfo "\t\040\040specified when building the kernel will likely oops or panic"
+	einfo "\t\040\040the kernel."
+	einfo "\t- X support is limited to the generic fbdev driver.  No X gbefb"
+	einfo "\t\040\040driver exists for O2 yet."
+	echo -e ""
+
+	if use ip32r10k; then
+		eerror "R10000/R12000 Support on IP32 is HIGHLY EXPERIMENTAL!"
+		eerror "This is intended ONLY for people interested in fixing it up.  And"
+		eerror "by that, I mean people willing to SEND IN PATCHES!  If you're not"
+		eerror "interested in debugging this issue seriously or just want to run it"
+		eerror "as a user, then DO NOT USE THIS.  Really, we mean it."
+		echo -e ""
+		eerror "All that said, initial testing seems to indicate that this system will"
+		eerror "stay online for a reasonable amount of time and will compile packages."
+		eerror "However, the primary console (which is serial, gbefb seems dead for now)"
+		eerror "will fill with CRIME CPU errors every so often.  A majority of these"
+		eerror "seem harmless, however a few non-fatal oopses have also been triggered."
+		echo -e ""
+		eerror "We're interesting in finding anyone with knowledge of the R10000"
+		eerror "workaround for speculative execution listed in the R10000 Processor"
+		eerror "manual, or those who are familiar with the IP32 chipset and the feature"
+		eerror "called \"Juice\"."
+		echo -e ""
+		eerror "To build this kernel tree, make sure you re-merge your kernel compiler"
+		eerror "with the \"ip32r10k\" USE flag enabled via crossdev.  This uses a"
+		eerror "tweaked version of the gcc cache barriers patch that makes gcc emit "
+		eerror "more barriers, as IP32 needs them to have any hope of staying online."
+	fi
+
+	eerror "!!! BIG FAT WARNING"
+	eerror "!!! To Build 64bit kernels for SGI O2 (IP32) or SGI Indy/Indigo2 R4x00 (IP22)"
+	eerror "!!! systems, you _need_ to be using a >=gcc-4.1.1 compiler.  In prior times, an"
+	eerror "!!! ugly hack was used to build an ELF64 binary that resembled an ELF32 binary in"
+	eerror "!!! order to make the ARCS PROMs on these systems boot the kernel. This hack is no"
+	eerror "!!! longer in use nor supported in 2.6.17 and beyond.  In order to achieve the same"
+	eerror "!!! effect, a new flag available in >=gcc-4.x is used, and as such, makes"
+	eerror "!!! >=gcc-4.1.1 the preferred compiler for 2.6.17 and beyond."
+	eerror ""
+	eerror "!!! One side effect of this is the need to build 64bit IP32 and IP22 kernels with the"
+	eerror "!!! following make command: ${GOOD}make vmlinux.32${NORMAL}"
+	eerror "!!! Once done, copy the ${GOOD}vmlinux.32${NORMAL} file and boot that.  Do not use the"
+	eerror "!!! ${BAD}vmlinux${NORMAL} file -- this will either not boot on IP22 or result in"
+	eerror "!!! undocumented weirdness on IP32 systems."
+}
+
+show_cobalt_info() {
+	echo -e ""
+	einfo "Please keep in mind that the 2.6 kernel will NOT boot on Cobalt"
+	einfo "systems that are still using the old Cobalt bootloader.  In"
+	einfo "order to boot a 2.6 kernel on Cobalt systems, you must be using"
+	einfo "the CoLo bootloader, which does not have the kernel"
+	einfo "size limitation that the older bootloader has.  If you want"
+	einfo "to use the newer bootloader, make sure you have sys-boot/colo"
+	einfo "installed and setup."
+	echo -e ""
+}
+
+
+
+#//------------------------------------------------------------------------------
+
+
+
+# Check our USE flags for machine-specific flags and give appropriate warnings/errors.
+# Hope the user isn't crazy enough to try using combinations of these flags.
+# Only use one machine-specific flag at a time for each type of desired machine-support.
+#
+# Affected machines:	ip27 ip28 ip30
+# Not Affected:		cobalt ip22 ip32
+pkg_setup() {
+	local arch_is_selected="no"
+	local mach_ip
+	local mach_enable
+	local mach_name
+	local x
+
+	# See if we're on a cobalt system first (must use the cobalt-mips profile)
+	if use cobalt; then
+		arch_is_selected="yes"
+		[ "${DO_CBLT}" = "no" ] && err_disabled_mach "Cobalt Microsystems" "CBLT" "cobalt"
+		show_cobalt_info
+	fi
+
+	# Exclusive machine patchsets
+	# These are not allowed to be mixed together, thus only one of them may be applied
+	# to a tree per merge.
+	for x in									\
+		"ip27 SGI Origin 200/2000"						\
+		"ip28 SGI Indigo2 Impact R10000"					\
+		"ip30 SGI Octane"
+	do
+		set -- ${x}		# Set positional params
+		mach_ip="${1}"		# Grab the first param (HW IP for SGI)
+		shift			# Shift the positions
+		mach_name="${*}"	# Get the rest (Name)
+
+		if use ${mach_ip}; then
+			# Fetch the value indiciating if the machine is enabled or not
+			mach_enable="DO_${mach_ip/ip/IP}"
+			mach_enable="${!mach_enable}"
+
+			# Make sure only one of these exclusive machine patches is selected
+			[ "${arch_is_selected}" = "no" ]				\
+				&& arch_is_selected="yes"				\
+				|| err_only_one_mach_allowed
+
+			# Is the machine support enabled or not?
+			[ "${mach_enable}" = "no" ]					\
+				&& err_disabled_mach "${mach_name}" "${mach_ip/ip/IP}" "${mach_ip}"
+
+			# Show relevant information about the machine
+			show_${mach_ip}_info
+		fi
+	done
+
+	# All other systems that don't have a USE flag go here
+	# These systems have base-line support included in linux-mips git, so
+	# instead of failing, if disabled, we simply warn the user
+	if [ "${arch_is_selected}" = "no" ]; then
+		[ "${DO_IP22}" = "no" ]							\
+			&& err_disabled_mach "SGI Indy/Indigo2 R4x00" "IP22" "skip"	\
+			|| show_ip22_info
+		[ "${DO_IP32}" = "no" ]							\
+			&& err_disabled_mach "SGI O2" "IP32" "skip"			\
+			|| show_ip32_info
+
+	fi
+}
+
+
+
+#//------------------------------------------------------------------------------
+
+
+
+# Generic Patches - Safe to use globally
+do_generic_patches() {
+	echo -e ""
+	ebegin ">>> Generic Patches"
+
+		# IP22 Patches
+		epatch ${MIPS_PATCHES}/misc-2.6.16-ip22-vino-64bit-ioctl-fixes.patch
+		epatch ${MIPS_PATCHES}/misc-2.6.20-ip22-pf-enhance-scsi.patch
+
+		# IP32 Patches
+		epatch ${MIPS_PATCHES}/misc-2.6.11-ip32-mace-is-always-eth0.patch
+
+		# Cobalt Patches
+		epatch ${MIPS_PATCHES}/misc-2.6.20-cobalt-bits.patch
+
+		# Generic
+		epatch ${MIPS_PATCHES}/misc-2.6.17-ths-mips-tweaks.patch
+		epatch ${MIPS_PATCHES}/misc-2.6.15-mips-iomap-functions.patch
+		epatch ${MIPS_PATCHES}/misc-2.6.12-seccomp-no-default.patch
+		epatch ${MIPS_PATCHES}/misc-2.6.11-add-byteorder-to-proc.patch
+		epatch ${MIPS_PATCHES}/misc-2.6.20-frank-kill-build_elf64.patch
+		epatch ${MIPS_PATCHES}/misc-2.6.20-squashfs-3.2-r2.patch
+	eend
+}
+
+
+# NOT safe for production systems
+# Use at own risk, do _not_ file bugs on effects of these patches
+do_sekrit_patches() {
+	# /* EXPERIMENTAL - DO NOT USE IN PRODUCTION KERNELS */
+
+	if use ip32r10k; then
+		# Modified version of the IP28 cache barriers patch for the kernel
+		# that removes all the IP28 specific pieces and leaves behind only
+		# the generic segments.
+		epatch ${MIPS_PATCHES}/misc-2.6.17-ip32-r10k-support.patch
+	fi
+
+##	# No Sekrit Patches!
+##	sleep 0
+
+	# /* EXPERIMENTAL - DO NOT USE IN PRODUCTION KERNELS */
+}
+
+
+
+#//------------------------------------------------------------------------------
+
+
+
+# Exclusive Machine Patchsets
+
+# SGI Origin (IP27)
+do_ip27_support() {
+	echo -e ""
+	einfo ">>> Patching kernel for SGI Origin 200/2000 (IP27) support ..."
+	epatch ${MIPS_PATCHES}/misc-2.6.18-ioc3-metadriver-r26.patch
+	epatch ${MIPS_PATCHES}/misc-2.6.17-ip27-horrible-hacks_may-eat-kittens.patch
+	epatch ${MIPS_PATCHES}/misc-2.6.17-ip27-rev-pci-tweak.patch
+	epatch ${MIPS_PATCHES}/misc-2.6.18-ip27-hack-attack.patch
+}
+
+# SGI Indigo2 Impact R10000 (IP28)
+do_ip28_support() {
+	echo -e ""
+	einfo ">>> Patching kernel for SGI Indigo2 Impact R10000 (IP28) support ..."
+	epatch ${MIPS_PATCHES}/misc-2.6.18-ip28-i2_impact-support.patch
+	epatch ${MIPS_PATCHES}/misc-2.6.17-ip28-impact-mmapfix.patch
+	epatch ${MIPS_PATCHES}/misc-2.6.17-ip28-wd93cac-tweak.patch
+}
+
+
+# SGI Octane 'Speedracer' (IP30)
+do_ip30_support() {
+	echo -e ""
+	einfo ">>> Patching kernel for SGI Octane (IP30) support ..."
+	epatch ${MIPS_PATCHES}/misc-2.6.19-ioc3-metadriver-r27.patch
+	epatch ${MIPS_PATCHES}/misc-2.6.20-ip30-octane-support-r28.patch
+}
+
+
+
+#//------------------------------------------------------------------------------
+
+
+
+# Renames source trees for the few machines that we have separate patches for
+rename_source_tree() {
+	if [ ! -z "${1}" ]; then
+		if use ${1}; then
+			mv ${S} ${S}.${1}
+			S="${S}.${1}"
+		fi
+	fi
+}
+
+
+
+#//------------------------------------------------------------------------------
+
+
+
+src_unpack() {
+	local x
+
+	unpack ${A}
+	mv ${WORKDIR}/linux-${STABLEVER} ${WORKDIR}/linux-${OKV}-${GITDATE}
+	cd ${S}
+
+
+	# If USE_RC == "yes", use a release candidate kernel (2.6.x-rcy)
+	# OR
+	# if USE_PNT == "yes", use a point-release kernel (2.6.x.y)
+	if [ "${USE_RC}" = "yes" -o "${USE_PNT}" = "yes" ]; then
+		echo -e ""
+		einfo ">>> linux-${STABLEVER} --> linux-${OKV} ..."
+		epatch ${WORKDIR}/patch-${OKV}
+	fi
+
+
+	# Update the vanilla sources with linux-mips GIT changes
+	echo -e ""
+	einfo ">>> linux-${OKV} --> linux-${OKV}-${GITDATE} patch ..."
+	epatch ${WORKDIR}/mipsgit-${F_KV}-${GITDATE}.diff
+
+	# Generic patches we always include
+	do_generic_patches
+
+	# Machine-specific patches
+	for x in {ip27,ip28,ip30}; do
+		use ${x} && do_${x}_support
+	done
+
+	# Patches for experimental use
+	do_sekrit_patches
+
+
+	# All done, resume normal portage work
+	kernel_universal_unpack
+}
+
+
+src_install() {
+	# Rename the source trees for exclusive machines
+	local x
+	for x in {ip27,ip28,ip30,cobalt}; do
+		use ${x} && rename_source_tree ${x}
+	done
+
+	kernel_src_install
+}
+
+pkg_postinst() {
+	# Symlink /usr/src/linux as appropriate
+	local my_ksrc="${S##*/}"
+	for x in {ip27,ip28,ip30,cobalt}; do
+		use ${x} && my_ksrc="${my_ksrc}.${x}"
+	done
+
+	if [ ! -e ${ROOT}usr/src/linux ]; then
+		rm -f ${ROOT}usr/src/linux
+		ln -sf ${my_ksrc} ${ROOT}/usr/src/linux
+	fi
+}
+
+
+#//------------------------------------------------------------------------------