use a script to generate kernels.  this should
reduce variance.

Reference: /n/atom/patch/applied/piconf
Date: Sun Jan 10 19:49:08 CET 2016
Signed-off-by: quanstro@quanstro.net

--- /sys/src/9/bcm/mkfile	Sun Jan 10 19:48:19 2016
+++ /sys/src/9/bcm/mkfile	Sun Jan 10 19:48:21 2016
@@ -1,6 +1,5 @@
 CONF=pi
-CONFLIST=pi pif pik piq picpu
-
+CONFLIST=pi pif pik piq picpu pi2 pi2f pi2k pi2q pi2cpu
 loadaddr=0x80008000
 
 objtype=arm
@@ -98,7 +97,7 @@
 
 archbcm.$O devether.$0: etherif.h ../port/netif.h
 archbcm.$O: ../port/flashif.h
-fpiarm.$O: ../port/fpi.h
+fpi.$O fpiarm.$O fpimem.$O: ../port/fpi.h
 l.$O lexception.$O lproc.$O mmu.$O: arm.s mem.h
 main.$O: errstr.h init.h reboot.h
 devmouse.$O mouse.$O screen.$O: screen.h
--- /sys/src/9/bcm/pi	Sun Jan 10 19:48:23 2016
+++ /sys/src/9/bcm/pi	Sun Jan 10 19:48:24 2016
@@ -12,18 +12,20 @@
 	tls
 	cap
 	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
-	draw	screen swcursor
+	draw	screen swcursor scrhx8357d spi
 	mouse	mouse
-	pckb latin1
+	pckb	latin1
 	uart
-#	spi	spi
-#	gpio
-#	i2c
+	spi	spi
+	gpio	gpio
+	i2c	i2c
 
 	fakertc
 	sd	pisdalloc
 	usb
 	ether	netif
+	aoe
+	snap
 	cec
 
 link
@@ -50,12 +52,12 @@
 
 	allocb
 
-	uartmini
+	uartmini	gpio
 
 	armv6
 	sdmmc	emmc
 	sdloop
-#	sdaoe
+	sdaoe
 
 	dma
 	vcore
--- /sys/src/9/bcm/pi2	Sun Jan 10 19:48:26 2016
+++ /sys/src/9/bcm/pi2	Sun Jan 10 19:48:27 2016
@@ -12,15 +12,20 @@
 	tls
 	cap
 	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
-	draw	screen swcursor
+	draw	screen swcursor scrhx8357d spi
 	mouse	mouse
-	pckb latin1
+	pckb	latin1
 	uart
+	spi	spi
+	gpio	gpio
+	i2c	i2c
 
 	fakertc
 	sd	pisdalloc
 	usb
 	ether	netif
+	aoe
+	snap
 	cec
 
 link
@@ -47,12 +52,12 @@
 
 	allocb
 
-	uartmini
+	uartmini	gpio
 
 	armv7
 	sdmmc	emmc
 	sdloop
-#	sdaoe
+	sdaoe
 
 	dma
 	vcore
--- /sys/src/9/bcm/pi2cpu	Sun Jan 10 19:48:29 2016
+++ /sys/src/9/bcm/pi2cpu	Sun Jan 10 19:48:30 2016
@@ -12,16 +12,20 @@
 	tls
 	cap
 	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
-	draw	screen swcursor
+	draw	screen swcursor scrhx8357d spi
 	mouse	mouse
 	pckb	latin1
 	uart
+	spi	spi
+	gpio	gpio
+	i2c	i2c
 
 	fakertc
 	sd	pisdalloc
 	usb
 	ether	netif
 	aoe
+	snap
 	cec
 
 link
@@ -48,9 +52,9 @@
 
 	allocb
 
-	armv7
-	uartmini
+	uartmini	gpio
 
+	armv7
 	sdmmc	emmc
 	sdloop
 	sdaoe
--- /sys/src/9/bcm/pi2f	Thu Jan  1 00:00:00 1970
+++ /sys/src/9/bcm/pi2f	Sun Jan 10 19:48:31 2016
@@ -0,0 +1,80 @@
+dev
+	root
+	cons
+	env
+	pipe
+	proc
+	mnt
+	srv
+	dup
+	arch
+	ssl
+	tls
+	cap
+	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
+	draw	screen swcursor scrhx8357d spi
+	mouse	mouse
+	pckb	latin1
+	uart
+	spi	spi
+	gpio	gpio
+	i2c	i2c
+
+	fakertc
+	sd	pisdalloc
+	usb
+	ether	netif
+	aoe
+	snap
+	cec
+
+link
+	archbcm2
+	loopbackmedium
+	ethermedium
+	usbdwc
+	etherusb
+
+ip
+	il
+	tcp
+	udp
+	ipifc
+	icmp
+	icmp6
+	ipmux
+
+misc
+	physalloc
+	qmalloc
+	noswap
+	drawalloc
+
+	allocb
+
+	uartmini	gpio
+
+	armv7
+	sdmmc	emmc
+	sdloop
+	sdaoe
+
+	dma
+	vcore
+	vfp3	coproc
+
+port
+	int cpuserver = 0;
+
+boot boot #S/sdM0/
+	tcp
+	il
+	local
+
+bootdir
+	boot$CONF.out	boot
+	/arm/bin/ip/ipconfig
+	/arm/bin/auth/factotum
+	/arm/bin/fossil/fossil
+	/arm/bin/venti/venti
+	/arm/bin/usb/usbd
--- /sys/src/9/bcm/pi2k	Thu Jan  1 00:00:00 1970
+++ /sys/src/9/bcm/pi2k	Sun Jan 10 19:48:32 2016
@@ -0,0 +1,79 @@
+dev
+	root
+	cons
+	env
+	pipe
+	proc
+	mnt
+	srv
+	dup
+	arch
+	ssl
+	tls
+	cap
+	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
+	draw	screen swcursor scrhx8357d spi
+	mouse	mouse
+	pckb	latin1
+	uart
+	spi	spi
+	gpio	gpio
+	i2c	i2c
+
+	fakertc
+	sd	pisdalloc
+	usb
+	ether	netif
+	aoe
+	snap
+	cec
+
+link
+	archbcm2
+	loopbackmedium
+	ethermedium
+	usbdwc
+	etherusb
+
+ip
+	il
+	tcp
+	udp
+	ipifc
+	icmp
+	icmp6
+	ipmux
+
+misc
+	physalloc
+	qmalloc
+	noswap
+	drawalloc
+
+	allocb
+
+	uartmini	gpio
+
+	armv7
+	sdmmc	emmc
+	sdloop
+	sdaoe
+
+	dma
+	vcore
+	vfp3	coproc
+
+port
+	int cpuserver = 0;
+
+boot boot #S/sdM0/
+	tcp
+	il
+	local
+
+bootdir
+	boot$CONF.out	boot
+	/arm/bin/ip/ipconfig
+	/arm/bin/auth/factotum
+	/arm/bin/disk/kfs
+	/arm/bin/usb/usbd
--- /sys/src/9/bcm/pi2q	Thu Jan  1 00:00:00 1970
+++ /sys/src/9/bcm/pi2q	Sun Jan 10 19:48:33 2016
@@ -0,0 +1,77 @@
+dev
+	root
+	cons
+	env
+	pipe
+	proc
+	mnt
+	srv
+	dup
+	arch
+	ssl
+	tls
+	cap
+	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
+	draw	screen swcursor scrhx8357d spi
+	mouse	mouse
+	pckb	latin1
+	uart
+	spi	spi
+	gpio	gpio
+	i2c	i2c
+
+	fakertc
+	sd	pisdalloc
+	usb
+	ether	netif
+	aoe
+	snap
+	cec
+
+link
+	archbcm2
+	loopbackmedium
+	ethermedium
+	usbdwc
+	etherusb
+
+ip
+	il
+	tcp
+	udp
+	ipifc
+	icmp
+	icmp6
+	ipmux
+
+misc
+	physalloc
+	qmalloc
+	noswap
+	drawalloc
+
+	qallocb
+
+	uartmini	gpio
+
+	armv7
+	sdmmc	emmc
+	sdloop
+	sdaoe
+
+	dma
+	vcore
+	vfp3	coproc
+
+port
+	int cpuserver = 0;
+
+boot boot #S/sdM0/
+	tcp
+	il
+
+bootdir
+	boot$CONF.out	boot
+	/arm/bin/ip/ipconfig
+	/arm/bin/auth/factotum
+	/arm/bin/usb/usbd
--- /sys/src/9/bcm/picpu	Sun Jan 10 19:48:35 2016
+++ /sys/src/9/bcm/picpu	Sun Jan 10 19:48:36 2016
@@ -12,10 +12,13 @@
 	tls
 	cap
 	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
-	draw	screen swcursor
+	draw	screen swcursor scrhx8357d spi
 	mouse	mouse
 	pckb	latin1
 	uart
+	spi	spi
+	gpio	gpio
+	i2c	i2c
 
 	fakertc
 	sd	pisdalloc
@@ -49,7 +52,7 @@
 
 	allocb
 
-	uartmini
+	uartmini	gpio
 
 	armv6
 	sdmmc	emmc
--- /sys/src/9/bcm/pif	Thu Jan  1 00:00:00 1970
+++ /sys/src/9/bcm/pif	Sun Jan 10 19:48:37 2016
@@ -0,0 +1,80 @@
+dev
+	root
+	cons
+	env
+	pipe
+	proc
+	mnt
+	srv
+	dup
+	arch
+	ssl
+	tls
+	cap
+	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
+	draw	screen swcursor scrhx8357d spi
+	mouse	mouse
+	pckb	latin1
+	uart
+	spi	spi
+	gpio	gpio
+	i2c	i2c
+
+	fakertc
+	sd	pisdalloc
+	usb
+	ether	netif
+	aoe
+	snap
+	cec
+
+link
+	archbcm
+	loopbackmedium
+	ethermedium
+	usbdwc
+	etherusb
+
+ip
+	il
+	tcp
+	udp
+	ipifc
+	icmp
+	icmp6
+	ipmux
+
+misc
+	physalloc
+	qmalloc
+	noswap
+	drawalloc
+
+	allocb
+
+	uartmini	gpio
+
+	armv6
+	sdmmc	emmc
+	sdloop
+	sdaoe
+
+	dma
+	vcore
+	vfp3	coproc
+
+port
+	int cpuserver = 0;
+
+boot boot #S/sdM0/
+	tcp
+	il
+	local
+
+bootdir
+	boot$CONF.out	boot
+	/arm/bin/ip/ipconfig
+	/arm/bin/auth/factotum
+	/arm/bin/fossil/fossil
+	/arm/bin/venti/venti
+	/arm/bin/usb/usbd
--- /sys/src/9/bcm/pifat	Sun Jan 10 19:48:39 2016
+++ /sys/src/9/bcm/pifat	Sun Jan 10 19:48:40 2016
@@ -9,7 +9,7 @@
 	dup
 	arch
 	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
-	draw	screen vcore swcursor
+	draw	screen swcursor scrhx8357d spi
 	mouse	mouse
 	pckb	latin1
 	uart
@@ -34,20 +34,21 @@
 	ipmux
 
 misc
-#	physalloc
-#	qmalloc
-#	swap
-
-	alloc
 	physalloc
+	qmalloc
 	noswap
-	xalloc
+	drawalloc
+
+	allocb
+
+	uartmini	gpio
 
-	uartmini
 	armv6
 	sdmmc	emmc
 	sdloop
+
 	dma
+	vcore
 	vfp3	coproc
 
 port
--- /sys/src/9/bcm/pik	Thu Jan  1 00:00:00 1970
+++ /sys/src/9/bcm/pik	Sun Jan 10 19:48:41 2016
@@ -0,0 +1,79 @@
+dev
+	root
+	cons
+	env
+	pipe
+	proc
+	mnt
+	srv
+	dup
+	arch
+	ssl
+	tls
+	cap
+	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
+	draw	screen swcursor scrhx8357d spi
+	mouse	mouse
+	pckb	latin1
+	uart
+	spi	spi
+	gpio	gpio
+	i2c	i2c
+
+	fakertc
+	sd	pisdalloc
+	usb
+	ether	netif
+	aoe
+	snap
+	cec
+
+link
+	archbcm
+	loopbackmedium
+	ethermedium
+	usbdwc
+	etherusb
+
+ip
+	il
+	tcp
+	udp
+	ipifc
+	icmp
+	icmp6
+	ipmux
+
+misc
+	physalloc
+	qmalloc
+	noswap
+	drawalloc
+
+	allocb
+
+	uartmini	gpio
+
+	armv6
+	sdmmc	emmc
+	sdloop
+	sdaoe
+
+	dma
+	vcore
+	vfp3	coproc
+
+port
+	int cpuserver = 0;
+
+boot boot #S/sdM0/
+	tcp
+	il
+	local
+
+bootdir
+	boot$CONF.out	boot
+	/arm/bin/ip/ipconfig
+	/arm/bin/auth/factotum
+	/arm/bin/disk/kfs
+	/arm/bin/usb/usbd
--- /sys/src/9/bcm/piq	Sun Jan 10 19:48:42 2016
+++ /sys/src/9/bcm/piq	Sun Jan 10 19:48:44 2016
@@ -12,15 +12,21 @@
 	tls
 	cap
 	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum inferno
-	draw	screen swcursor
+	draw	screen swcursor scrhx8357d spi
 	mouse	mouse
-	pckb latin1
+	pckb	latin1
 	uart
+	spi	spi
+	gpio	gpio
+	i2c	i2c
 
 	fakertc
 	sd	pisdalloc
 	usb
 	ether	netif
+	aoe
+	snap
+	cec
 
 link
 	archbcm
@@ -46,12 +52,12 @@
 
 	qallocb
 
-	uartmini
+	uartmini	gpio
 
 	armv6
 	sdmmc	emmc
 	sdloop
-#	sdaoe
+	sdaoe
 
 	dma
 	vcore