path: root/sys-kernel/mips-sources/mips-sources-2.6.14.4.ebuild

# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-kernel/mips-sources/mips-sources-2.6.14.4.ebuild,v 1.2 2005/12/20 19:38:30 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 Octane Support		(http://www.linux-mips.org/~skylark/)
# 5) Patch for IP28 Octane 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=${PV/_/-}
GITDATE="20051030"			# Date of diff between kernel.org and lmo GIT
SECPATCHVER="1.15"			# Tarball version for security patches
GENPATCHVER="1.16"			# Tarball version for generic patches
EXTRAVERSION="-mipsgit-${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=""
USERC="no"				# If set to "yes", then attempt to use an RC kernel
USEPNT="yes"				# If set to "yes", then attempt to use a point-release (2.6.x.y)

# 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"


# If USERC == "yes", use a release candidate kernel (2.6.X-rcY)
# Do not set this to "yes" if using a point-release kernel
if [ "${USERC}" = "yes" ]; then
	KVXY="$(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}"
fi

# If USEPNT == "yes", use a point release kernel (2.6.x.y)
# Do not set this to "yes" if using a release candidate kernel
if [ "${USEPNT}" = "yes" ]; then
	F_KV="$(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}"
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/${PN}-security_patches-${SECPATCHVER}.tar.bz2
		mirror://gentoo/${PN}-generic_patches-${GENPATCHVER}.tar.bz2
		${PATCHVER}"



#//------------------------------------------------------------------------------



# Error message 
err_only_one_arch_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"
}


# Check our USE flags for machine-specific flags and give appropriate warnings.
# 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"

	# See if we're using IP27 (Origin)
	if use ip27; then
#		echo -e ""
#		eerror "SGI Origin (IP27) Support has been disabled in this ebuild"
#		eerror "revision.  If you wish to merge IP27 sources, then"
#		eerror "run USE=\"ip27\" emerge =mips-sources-2.x.y.z"
#		die "IP27 Support disabled."
		if [ "${arch_is_selected}" = "no" ]; then
			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 ""
			arch_is_selected="yes"
		else
			err_only_one_arch_allowed
		fi
	fi


	# See if we're using IP28 (Indigo2 Impact R10000)
	if use ip28; then
		if [ "${arch_is_selected}" = "no" ]; then
			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 (default-linux/mips/mips64/ip28/XXXX.Y), because a very special"
			ewarn "patch is used on the system gcc, kernel-gcc (gcc-mips64) and the kernel"
			ewarn "itself in order to support this machine.  These patches will only be applied"
			ewarn "if \"ip28\" is defined in USE, which the profile sets.  If you wish to"
			ewarn "cross-compile a kernel, you _must_ make sure that the \"ip28\" USE is"
			ewarn "defined in your host system's /etc/make.conf file before using crossdev"
			ewarn "to build a mips64 kernel compiler for this system."
			echo -e ""
			ewarn "As a final warning, _nothing_ is guaranteed to work smoothly."
			echo -e ""
			arch_is_selected="yes"
		else
			err_only_one_arch_allowed
		fi
	fi


	# See if we're using IP30 (Octane)
	if use ip30; then
		if [ "${arch_is_selected}" = "no" ]; then
			echo -e ""
			einfo "Things to keep in mind when building a kernel for an SGI Octane:"
			einfo "\t- The scsi driver to use is qla1280; qlogicisp is gone."
			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  PCI-to-PCI bridges (USB hubs, USB flash card readers for example)."
			einfo "\t- Other XIO-based devices like MENET and various Impact addons remain"
			einfo "\t  untested and are not guaranteed to work.  This applies to various"
			einfo "\t  digital video conversion boards as well."
			echo -e ""
			arch_is_selected="yes"
		else
			err_only_one_arch_allowed
		fi
	fi


	# See if we're on a cobalt system (must use the cobalt-mips profile)
	if use cobalt; then
		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 ""
		arch_is_selected="yes"
	fi


	# All other systems
	if [ "${arch_is_selected}" = "no" ]; then
		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.  Additionally, only the Newport (XL) graphics card"
		einfo "functions.  A driver for the Extreme (XZ) card is in the works,"
		einfo "but has not been released by its author yet for public consumption."
		echo -e ""
		einfo "IP32 systems function well, however there exists no sound card"
		einfo "support yet for these systems."
		echo -e ""
	fi
}



#//------------------------------------------------------------------------------



# Generic Patches - Safe to use globally
do_generic_patches() {
	echo -e ""
	ebegin ">>> Generic Patches"
		# IP22 Patches
		epatch ${MIPS_PATCHES}/misc-2.6.11-ip22-chk-consoleout-is-serial.patch

		# IP32 Patches (Safe for non-IP32 use)
		epatch ${MIPS_PATCHES}/misc-2.6.12-ip32-onion2-gbefb-fixes.patch
		epatch ${MIPS_PATCHES}/misc-2.6.10-ip32-tweak-makefile.patch
		epatch ${MIPS_PATCHES}/misc-2.6.11-ip32-mace-is-always-eth0.patch
		epatch ${MIPS_PATCHES}/misc-2.6.12-ip32-stupid-gbefb-typo.patch

		# Cobalt Patches (Safe for non-Cobalt use)
		epatch ${MIPS_PATCHES}/misc-2.6.14-cobalt-bits.patch

		# Generic
		epatch ${MIPS_PATCHES}/misc-2.6.14-ths-mips-tweaks.patch
		epatch ${MIPS_PATCHES}/misc-2.6.13-add-ramdisk-back.patch
		epatch ${MIPS_PATCHES}/misc-2.6.14-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-2.6.13-n32-fix-sigsuspend.patch
		epatch ${MIPS_PATCHES}/misc-2.6.14-r14k-cpu-prid-r2.patch
		epatch ${MIPS_PATCHES}/misc-2.6.14-add-4k_cache_defines.patch
		epatch ${MIPS_PATCHES}/misc-2.6.14-r1xk_use_r4k_cache.patch
		epatch ${MIPS_PATCHES}/misc-2.6.14-rem-UL-constants.patch

		# Ugly Hacks
		if ! use ip28 && ! use ip30; then
			epatch ${MIPS_PATCHES}/misc-2.6.13-ugly-wrong-kphysaddr-hack.patch
		fi
	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 */

	# No Sekrit Patches!
	sleep 0

	# /* EXPERIMENTAL - DO NOT USE IN PRODUCTION KERNELS */
}


do_security_patches() {
	echo -e ""
	ebegin ">>> Applying Security Fixes"
		einfo ">>> None to apply! ..."
		echo -e ""
##		epatch ${MIPS_SECURITY}/
	eend
}



#//------------------------------------------------------------------------------



# These patches are separate from generic patches for a good reason - namely because it is
# possible (but untested) that patches for one machine-type may conflict with patches from
# another machine type and therefore produce unwanted side-effects.  We therefore enforce 
# this by checking if an arch patch has already been applied, and if so, error out.

# SGI Origin (IP27)
do_ip27_support() {
	echo -e ""
	einfo ">>> Patching kernel for SGI Origin (IP27) support ..."
	epatch ${MIPS_PATCHES}/misc-2.6.14-ioc3-metadriver-r26.patch
	epatch ${MIPS_PATCHES}/misc-2.6.13-ip27-horrible-hacks_may-eat-kittens.patch
	epatch ${MIPS_PATCHES}/misc-2.6.14-ip27-rev-pci-tweak.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-2.6.14-ip28-i2_impact-support.patch
}


# SGI Octane 'Speedracer' (IP30)
do_ip30_support() {
	echo -e ""
	einfo ">>> Patching kernel for SGI Octane (IP30) support ..."
	epatch ${MIPS_PATCHES}/misc-2.6.14-ioc3-metadriver-r26.patch
	epatch ${MIPS_PATCHES}/misc-2.6.14-ip30-octane-support-r27.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() {
	unpack ${A}
	mv ${WORKDIR}/linux-${STABLEVER} ${WORKDIR}/linux-${OKV}-${GITDATE}
	cd ${S}


	# If USERC == "yes", use a release candidate kernel (2.6.x-rcy)
	# OR
	# if USEPNT == "yes", use a point-release kernel (2.6.x.y)
	if [ "${USERC}" = "yes" -o "${USEPNT}" = "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
	use ip27	&& do_ip27_support
	use ip28	&& do_ip28_support
	use ip30	&& do_ip30_support

	# Patches for experimental use
	do_sekrit_patches

	# Security Fixes
	do_security_patches


	# All done, resume normal portage work
	kernel_universal_unpack
}


src_install() {
	use ip27	&& rename_source_tree ip27
	use ip28	&& rename_source_tree ip28
	use ip30	&& rename_source_tree ip30

	kernel_src_install
}

pkg_postinst() {
	local my_ksrc="${S##*/}"
	use ip27	&& my_ksrc="${my_ksrc}.ip27"
	use ip28	&& my_ksrc="${my_ksrc}.ip28"
	use ip30	&& my_ksrc="${my_ksrc}.ip30"

	if [ ! -e ${ROOT}usr/src/linux ]; then
		rm -f ${ROOT}usr/src/linux
		ln -sf ${my_ksrc} ${ROOT}/usr/src/linux
	fi
}


#//------------------------------------------------------------------------------