Merge branch 'virtex-for-2.6.27' of git://git.secretlab.ca/git/linux-2.6-virtex into 4xx-next

Documentation/powerpc/bootwrapper.txt

+The PowerPC boot wrapper
+------------------------
+Copyright (C) Secret Lab Technologies Ltd.
+
+PowerPC image targets compresses and wraps the kernel image (vmlinux) with
+a boot wrapper to make it usable by the system firmware.  There is no
+standard PowerPC firmware interface, so the boot wrapper is designed to
+be adaptable for each kind of image that needs to be built.
+
+The boot wrapper can be found in the arch/powerpc/boot/ directory.  The
+Makefile in that directory has targets for all the available image types.
+The different image types are used to support all of the various firmware
+interfaces found on PowerPC platforms.  OpenFirmware is the most commonly
+used firmware type on general purpose PowerPC systems from Apple, IBM and
+others.  U-Boot is typically found on embedded PowerPC hardware, but there
+are a handful of other firmware implementations which are also popular.  Each
+firmware interface requires a different image format.
+
+The boot wrapper is built from the makefile in arch/powerpc/boot/Makefile and
+it uses the wrapper script (arch/powerpc/boot/wrapper) to generate target
+image.  The details of the build system is discussed in the next section.
+Currently, the following image format targets exist:
+
+   cuImage.%:		Backwards compatible uImage for older version of
+			U-Boot (for versions that don't understand the device
+			tree).  This image embeds a device tree blob inside
+			the image.  The boot wrapper, kernel and device tree
+			are all embedded inside the U-Boot uImage file format
+			with boot wrapper code that extracts data from the old
+			bd_info structure and loads the data into the device
+			tree before jumping into the kernel.
+			  Because of the series of #ifdefs found in the
+			bd_info structure used in the old U-Boot interfaces,
+			cuImages are platform specific.  Each specific
+			U-Boot platform has a different platform init file
+			which populates the embedded device tree with data
+			from the platform specific bd_info file.  The platform
+			specific cuImage platform init code can be found in
+			arch/powerpc/boot/cuboot.*.c.  Selection of the correct
+			cuImage init code for a specific board can be found in
+			the wrapper structure.
+   dtbImage.%:		Similar to zImage, except device tree blob is embedded
+			inside the image instead of provided by firmware.  The
+			output image file can be either an elf file or a flat
+			binary depending on the platform.
+			  dtbImages are used on systems which do not have an
+			interface for passing a device tree directly.
+			dtbImages are similar to simpleImages except that
+			dtbImages have platform specific code for extracting
+			data from the board firmware, but simpleImages do not
+			talk to the firmware at all.
+			  PlayStation 3 support uses dtbImage.  So do Embedded
+			Planet boards using the PlanetCore firmware.  Board
+			specific initialization code is typically found in a
+			file named arch/powerpc/boot/<platform>.c; but this
+			can be overridden by the wrapper script.
+   simpleImage.%:	Firmware independent compressed image that does not
+			depend on any particular firmware interface and embeds
+			a device tree blob.  This image is a flat binary that
+			can be loaded to any location in RAM and jumped to.
+			Firmware cannot pass any configuration data to the
+			kernel with this image type and it depends entirely on
+			the embedded device tree for all information.
+			  The simpleImage is useful for booting systems with
+			an unknown firmware interface or for booting from
+			a debugger when no firmware is present (such as on
+			the Xilinx Virtex platform).  The only assumption that
+			simpleImage makes is that RAM is correctly initialized
+			and that the MMU is either off or has RAM mapped to
+			base address 0.
+			  simpleImage also supports inserting special platform
+			specific initialization code to the start of the bootup
+			sequence.  The virtex405 platform uses this feature to
+			ensure that the cache is invalidated before caching
+			is enabled.  Platform specific initialization code is
+			added as part of the wrapper script and is keyed on
+			the image target name.  For example, all
+			simpleImage.virtex405-* targets will add the
+			virtex405-head.S initialization code (This also means
+			that the dts file for virtex405 targets should be
+			named (virtex405-<board>.dts).  Search the wrapper
+			script for 'virtex405' and see the file
+			arch/powerpc/boot/virtex405-head.S for details.
+   treeImage.%;		Image format for used with OpenBIOS firmware found
+			on some ppc4xx hardware.  This image embeds a device
+			tree blob inside the image.
+   uImage:		Native image format used by U-Boot.  The uImage target
+			does not add any boot code.  It just wraps a compressed
+			vmlinux in the uImage data structure.  This image
+			requires a version of U-Boot that is able to pass
+			a device tree to the kernel at boot.  If using an older
+			version of U-Boot, then you need to use a cuImage
+			instead.
+   zImage.%:		Image format which does not embed a device tree.
+			Used by OpenFirmware and other firmware interfaces
+			which are able to supply a device tree.  This image
+			expects firmware to provide the device tree at boot.
+			Typically, if you have general purpose PowerPC
+			hardware then you want this image format.
+
+Image types which embed a device tree blob (simpleImage, dtbImage, treeImage,
+and cuImage) all generate the device tree blob from a file in the
+arch/powerpc/boot/dts/ directory.  The Makefile selects the correct device
+tree source based on the name of the target.  Therefore, if the kernel is
+built with 'make treeImage.walnut simpleImage.virtex405-ml403', then the
+build system will use arch/powerpc/boot/dts/walnut.dts to build
+treeImage.walnut and arch/powerpc/boot/dts/virtex405-ml403.dts to build
+the simpleImage.virtex405-ml403.
+
+Two special targets called 'zImage' and 'zImage.initrd' also exist.  These
+targets build all the default images as selected by the kernel configuration.
+Default images are selected by the boot wrapper Makefile
+(arch/powerpc/boot/Makefile) by adding targets to the $image-y variable.  Look
+at the Makefile to see which default image targets are available.
+
+How it is built
+---------------
+arch/powerpc is designed to support multiplatform kernels, which means
+that a single vmlinux image can be booted on many different target boards.
+It also means that the boot wrapper must be able to wrap for many kinds of
+images on a single build.  The design decision was made to not use any
+conditional compilation code (#ifdef, etc) in the boot wrapper source code.
+All of the boot wrapper pieces are buildable at any time regardless of the
+kernel configuration.  Building all the wrapper bits on every kernel build
+also ensures that obscure parts of the wrapper are at the very least compile
+tested in a large variety of environments.
+
+The wrapper is adapted for different image types at link time by linking in
+just the wrapper bits that are appropriate for the image type.  The 'wrapper
+script' (found in arch/powerpc/boot/wrapper) is called by the Makefile and
+is responsible for selecting the correct wrapper bits for the image type.
+The arguments are well documented in the script's comment block, so they
+are not repeated here.  However, it is worth mentioning that the script
+uses the -p (platform) argument as the main method of deciding which wrapper
+bits to compile in.  Look for the large 'case "$platform" in' block in the
+middle of the script.  This is also the place where platform specific fixups
+can be selected by changing the link order.
+
+In particular, care should be taken when working with cuImages.  cuImage
+wrapper bits are very board specific and care should be taken to make sure
+the target you are trying to build is supported by the wrapper bits.

arch/powerpc/Kconfig

@@ -458,6 +458,19 @@ config CMDLINE
 	  some command-line options at build time by entering them here.  In
 	  most cases you will need to specify the root device here.
 
+config EXTRA_TARGETS
+	string "Additional default image types"
+	help
+	  List additional targets to be built by the bootwrapper here (separated
+	  by spaces).  This is useful for targets that depend of device tree
+	  files in the .dts directory.
+
+	  Targets in this list will be build as part of the default build
+	  target, or when the user does a 'make zImage' or a
+	  'make zImage.initrd'.
+
+	  If unsure, leave blank
+
 if !44x || BROKEN
 config ARCH_WANTS_FREEZER_CONTROL
 	def_bool y

arch/powerpc/Makefile

@@ -163,12 +163,25 @@ bootwrapper_install %.dtb:
 	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 
 define archhelp
-  @echo '* zImage          - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
+  @echo '* zImage          - Build default images selected by kernel config'
+  @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
+  @echo '  uImage          - U-Boot native image format'
+  @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
+  @echo '                    versions which do not support device trees'
+  @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
+  @echo '  simpleImage.<dt> - Firmware independent image.'
+  @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
   @echo '  install         - Install kernel using'
   @echo '                    (your) ~/bin/installkernel or'
   @echo '                    (distribution) /sbin/installkernel or'
   @echo '                    install to $$(INSTALL_PATH) and run lilo'
   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
+  @echo ''
+  @echo '  Targets with <dt> embed a device tree blob inside the image'
+  @echo '  These targets support board with firmware that does not'
+  @echo '  support passing a device tree directly.  Replace <dt> with the'
+  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
+  @echo '  (minus the .dts extension).'
 endef
 
 install:

arch/powerpc/boot/Makefile

@@ -68,7 +68,7 @@ src-plat := of.c cuboot-52xx.c cuboot-824x.c cuboot-83xx.c cuboot-85xx.c holly.c
 		fixed-head.S ep88xc.c ep405.c cuboot-c2k.c \
 		cuboot-katmai.c cuboot-rainier.c redboot-8xx.c ep8248e.c \
 		cuboot-warp.c cuboot-85xx-cpm2.c cuboot-yosemite.c simpleboot.c \
-		virtex405-head.S redboot-83xx.c cuboot-sam440ep.c
+		virtex405-head.S virtex.c redboot-83xx.c cuboot-sam440ep.c
 src-boot := $(src-wlib) $(src-plat) empty.c
 
 src-boot := $(addprefix $(obj)/, $(src-boot))
@@ -276,6 +276,9 @@ ifeq ($(CONFIG_PPC32),y)
 image-$(CONFIG_PPC_PMAC)	+= zImage.coff zImage.miboot
 endif
 
+# Allow extra targets to be added to the defconfig
+image-y	+= $(subst ",,$(CONFIG_EXTRA_TARGETS))
+
 initrd-  := $(patsubst zImage%, zImage.initrd%, $(image-n) $(image-))
 initrd-y := $(patsubst zImage%, zImage.initrd%, \
 		$(patsubst dtbImage%, dtbImage.initrd%, \

arch/powerpc/boot/dts/virtex440-ml507.dts

+/*
+ * This file supports the Xilinx ML507 board with the 440 processor.
+ * A reference design for the FPGA is provided at http://git.xilinx.com.
+ *
+ * (C) Copyright 2008 Xilinx, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "xlnx,virtex440";
+	dcr-parent = <&ppc440_0>;
+	model = "testing";
+	DDR2_SDRAM: memory@0 {
+		device_type = "memory";
+		reg = < 0 0x10000000 >;
+	} ;
+	chosen {
+		bootargs = "console=ttyS0 ip=on root=/dev/ram";
+		linux,stdout-path = "/plb@0/serial@83e00000";
+	} ;
+	cpus {
+		#address-cells = <1>;
+		#cpus = <1>;
+		#size-cells = <0>;
+		ppc440_0: cpu@0 {
+			clock-frequency = <400000000>;
+			compatible = "PowerPC,440", "ibm,ppc440";
+			d-cache-line-size = <0x20>;
+			d-cache-size = <0x8000>;
+			dcr-access-method = "native";
+			dcr-controller ;
+			device_type = "cpu";
+			i-cache-line-size = <0x20>;
+			i-cache-size = <0x8000>;
+			model = "PowerPC,440";
+			reg = <0>;
+			timebase-frequency = <400000000>;
+			xlnx,apu-control = <1>;
+			xlnx,apu-udi-0 = <0>;
+			xlnx,apu-udi-1 = <0>;
+			xlnx,apu-udi-10 = <0>;
+			xlnx,apu-udi-11 = <0>;
+			xlnx,apu-udi-12 = <0>;
+			xlnx,apu-udi-13 = <0>;
+			xlnx,apu-udi-14 = <0>;
+			xlnx,apu-udi-15 = <0>;
+			xlnx,apu-udi-2 = <0>;
+			xlnx,apu-udi-3 = <0>;
+			xlnx,apu-udi-4 = <0>;
+			xlnx,apu-udi-5 = <0>;
+			xlnx,apu-udi-6 = <0>;
+			xlnx,apu-udi-7 = <0>;
+			xlnx,apu-udi-8 = <0>;
+			xlnx,apu-udi-9 = <0>;
+			xlnx,dcr-autolock-enable = <1>;
+			xlnx,dcu-rd-ld-cache-plb-prio = <0>;
+			xlnx,dcu-rd-noncache-plb-prio = <0>;
+			xlnx,dcu-rd-touch-plb-prio = <0>;
+			xlnx,dcu-rd-urgent-plb-prio = <0>;
+			xlnx,dcu-wr-flush-plb-prio = <0>;
+			xlnx,dcu-wr-store-plb-prio = <0>;
+			xlnx,dcu-wr-urgent-plb-prio = <0>;
+			xlnx,dma0-control = <0>;
+			xlnx,dma0-plb-prio = <0>;
+			xlnx,dma0-rxchannelctrl = <0x1010000>;
+			xlnx,dma0-rxirqtimer = <0x3ff>;
+			xlnx,dma0-txchannelctrl = <0x1010000>;
+			xlnx,dma0-txirqtimer = <0x3ff>;
+			xlnx,dma1-control = <0>;
+			xlnx,dma1-plb-prio = <0>;
+			xlnx,dma1-rxchannelctrl = <0x1010000>;
+			xlnx,dma1-rxirqtimer = <0x3ff>;
+			xlnx,dma1-txchannelctrl = <0x1010000>;
+			xlnx,dma1-txirqtimer = <0x3ff>;
+			xlnx,dma2-control = <0>;
+			xlnx,dma2-plb-prio = <0>;
+			xlnx,dma2-rxchannelctrl = <0x1010000>;
+			xlnx,dma2-rxirqtimer = <0x3ff>;
+			xlnx,dma2-txchannelctrl = <0x1010000>;
+			xlnx,dma2-txirqtimer = <0x3ff>;
+			xlnx,dma3-control = <0>;
+			xlnx,dma3-plb-prio = <0>;
+			xlnx,dma3-rxchannelctrl = <0x1010000>;
+			xlnx,dma3-rxirqtimer = <0x3ff>;
+			xlnx,dma3-txchannelctrl = <0x1010000>;
+			xlnx,dma3-txirqtimer = <0x3ff>;
+			xlnx,endian-reset = <0>;
+			xlnx,generate-plb-timespecs = <1>;
+			xlnx,icu-rd-fetch-plb-prio = <0>;
+			xlnx,icu-rd-spec-plb-prio = <0>;
+			xlnx,icu-rd-touch-plb-prio = <0>;
+			xlnx,interconnect-imask = <0xffffffff>;
+			xlnx,mplb-allow-lock-xfer = <1>;
+			xlnx,mplb-arb-mode = <0>;
+			xlnx,mplb-awidth = <0x20>;
+			xlnx,mplb-counter = <0x500>;
+			xlnx,mplb-dwidth = <0x80>;
+			xlnx,mplb-max-burst = <8>;
+			xlnx,mplb-native-dwidth = <0x80>;
+			xlnx,mplb-p2p = <0>;
+			xlnx,mplb-prio-dcur = <2>;
+			xlnx,mplb-prio-dcuw = <3>;
+			xlnx,mplb-prio-icu = <4>;
+			xlnx,mplb-prio-splb0 = <1>;
+			xlnx,mplb-prio-splb1 = <0>;
+			xlnx,mplb-read-pipe-enable = <1>;
+			xlnx,mplb-sync-tattribute = <0>;
+			xlnx,mplb-wdog-enable = <1>;
+			xlnx,mplb-write-pipe-enable = <1>;
+			xlnx,mplb-write-post-enable = <1>;
+			xlnx,num-dma = <1>;
+			xlnx,pir = <0xf>;
+			xlnx,ppc440mc-addr-base = <0>;
+			xlnx,ppc440mc-addr-high = <0xfffffff>;
+			xlnx,ppc440mc-arb-mode = <0>;
+			xlnx,ppc440mc-bank-conflict-mask = <0xc00000>;
+			xlnx,ppc440mc-control = <0xf810008f>;
+			xlnx,ppc440mc-max-burst = <8>;
+			xlnx,ppc440mc-prio-dcur = <2>;
+			xlnx,ppc440mc-prio-dcuw = <3>;
+			xlnx,ppc440mc-prio-icu = <4>;
+			xlnx,ppc440mc-prio-splb0 = <1>;
+			xlnx,ppc440mc-prio-splb1 = <0>;
+			xlnx,ppc440mc-row-conflict-mask = <0x3ffe00>;
+			xlnx,ppcdm-asyncmode = <0>;
+			xlnx,ppcds-asyncmode = <0>;
+			xlnx,user-reset = <0>;
+			DMA0: sdma@80 {
+				compatible = "xlnx,ll-dma-1.00.a";
+				dcr-reg = < 0x80 0x11 >;
+				interrupt-parent = <&xps_intc_0>;
+				interrupts = < 9 2 0xa 2 >;
+			} ;
+		} ;
+	} ;
+	plb_v46_0: plb@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "xlnx,plb-v46-1.02.a", "simple-bus";
+		ranges ;
+		DIP_Switches_8Bit: gpio@81460000 {
+			compatible = "xlnx,xps-gpio-1.00.a";
+			interrupt-parent = <&xps_intc_0>;
+			interrupts = < 6 2 >;
+			reg = < 0x81460000 0x10000 >;
+			xlnx,all-inputs = <1>;
+			xlnx,all-inputs-2 = <0>;
+			xlnx,dout-default = <0>;
+			xlnx,dout-default-2 = <0>;
+			xlnx,family = "virtex5";
+			xlnx,gpio-width = <8>;
+			xlnx,interrupt-present = <1>;
+			xlnx,is-bidir = <1>;
+			xlnx,is-bidir-2 = <1>;
+			xlnx,is-dual = <0>;
+			xlnx,tri-default = <0xffffffff>;
+			xlnx,tri-default-2 = <0xffffffff>;
+		} ;
+		Hard_Ethernet_MAC: xps-ll-temac@81c00000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "xlnx,compound";
+			ethernet@81c00000 {
+				compatible = "xlnx,xps-ll-temac-1.01.b";
+				device_type = "network";
+				interrupt-parent = <&xps_intc_0>;
+				interrupts = < 5 2 >;
+				llink-connected = <&DMA0>;
+				local-mac-address = [ 02 00 00 00 00 00 ];
+				reg = < 0x81c00000 0x40 >;
+				xlnx,bus2core-clk-ratio = <1>;
+				xlnx,phy-type = <1>;
+				xlnx,phyaddr = <1>;
+				xlnx,rxcsum = <1>;
+				xlnx,rxfifo = <0x1000>;
+				xlnx,temac-type = <0>;
+				xlnx,txcsum = <1>;
+				xlnx,txfifo = <0x1000>;
+			} ;
+		} ;
+		LEDs_8Bit: gpio@81400000 {
+			compatible = "xlnx,xps-gpio-1.00.a";
+			reg = < 0x81400000 0x10000 >;
+			xlnx,all-inputs = <0>;
+			xlnx,all-inputs-2 = <0>;
+			xlnx,dout-default = <0>;
+			xlnx,dout-default-2 = <0>;
+			xlnx,family = "virtex5";
+			xlnx,gpio-width = <8>;
+			xlnx,interrupt-present = <0>;
+			xlnx,is-bidir = <1>;
+			xlnx,is-bidir-2 = <1>;
+			xlnx,is-dual = <0>;
+			xlnx,tri-default = <0xffffffff>;
+			xlnx,tri-default-2 = <0xffffffff>;
+		} ;
+		LEDs_Positions: gpio@81420000 {
+			compatible = "xlnx,xps-gpio-1.00.a";
+			reg = < 0x81420000 0x10000 >;
+			xlnx,all-inputs = <0>;
+			xlnx,all-inputs-2 = <0>;
+			xlnx,dout-default = <0>;
+			xlnx,dout-default-2 = <0>;
+			xlnx,family = "virtex5";
+			xlnx,gpio-width = <5>;
+			xlnx,interrupt-present = <0>;
+			xlnx,is-bidir = <1>;
+			xlnx,is-bidir-2 = <1>;
+			xlnx,is-dual = <0>;
+			xlnx,tri-default = <0xffffffff>;
+			xlnx,tri-default-2 = <0xffffffff>;
+		} ;
+		Push_Buttons_5Bit: gpio@81440000 {
+			compatible = "xlnx,xps-gpio-1.00.a";
+			interrupt-parent = <&xps_intc_0>;
+			interrupts = < 7 2 >;
+			reg = < 0x81440000 0x10000 >;
+			xlnx,all-inputs = <1>;
+			xlnx,all-inputs-2 = <0>;
+			xlnx,dout-default = <0>;
+			xlnx,dout-default-2 = <0>;
+			xlnx,family = "virtex5";
+			xlnx,gpio-width = <5>;
+			xlnx,interrupt-present = <1>;
+			xlnx,is-bidir = <1>;
+			xlnx,is-bidir-2 = <1>;
+			xlnx,is-dual = <0>;
+			xlnx,tri-default = <0xffffffff>;
+			xlnx,tri-default-2 = <0xffffffff>;
+		} ;
+		RS232_Uart_1: serial@83e00000 {
+			clock-frequency = <100000000>;
+			compatible = "xlnx,xps-uart16550-2.00.a", "ns16550";
+			current-speed = <0x2580>;
+			device_type = "serial";
+			interrupt-parent = <&xps_intc_0>;
+			interrupts = < 8 2 >;
+			reg = < 0x83e00000 0x10000 >;
+			reg-offset = <3>;
+			reg-shift = <2>;
+			xlnx,family = "virtex5";
+			xlnx,has-external-rclk = <0>;
+			xlnx,has-external-xin = <0>;
+			xlnx,is-a-16550 = <1>;
+		} ;
+		SysACE_CompactFlash: sysace@83600000 {
+			compatible = "xlnx,xps-sysace-1.00.a";
+			interrupt-parent = <&xps_intc_0>;
+			interrupts = < 4 2 >;
+			reg = < 0x83600000 0x10000 >;
+			xlnx,family = "virtex5";
+			xlnx,mem-width = <0x10>;
+		} ;
+		xps_bram_if_cntlr_1: xps-bram-if-cntlr@ffff0000 {
+			compatible = "xlnx,xps-bram-if-cntlr-1.00.a";
+			reg = < 0xffff0000 0x10000 >;
+			xlnx,family = "virtex5";
+		} ;
+		xps_intc_0: interrupt-controller@81800000 {
+			#interrupt-cells = <2>;
+			compatible = "xlnx,xps-intc-1.00.a";
+			interrupt-controller ;
+			reg = < 0x81800000 0x10000 >;
+			xlnx,num-intr-inputs = <0xb>;
+		} ;
+		xps_timebase_wdt_1: xps-timebase-wdt@83a00000 {
+			compatible = "xlnx,xps-timebase-wdt-1.00.b";
+			interrupt-parent = <&xps_intc_0>;
+			interrupts = < 2 0 1 2 >;
+			reg = < 0x83a00000 0x10000 >;
+			xlnx,family = "virtex5";
+			xlnx,wdt-enable-once = <0>;
+			xlnx,wdt-interval = <0x1e>;
+		} ;
+		xps_timer_1: timer@83c00000 {
+			compatible = "xlnx,xps-timer-1.00.a";
+			interrupt-parent = <&xps_intc_0>;
+			interrupts = < 3 2 >;
+			reg = < 0x83c00000 0x10000 >;
+			xlnx,count-width = <0x20>;
+			xlnx,family = "virtex5";
+			xlnx,gen0-assert = <1>;
+			xlnx,gen1-assert = <1>;
+			xlnx,one-timer-only = <1>;
+			xlnx,trig0-assert = <1>;
+			xlnx,trig1-assert = <1>;
+		} ;
+	} ;
+}  ;

arch/powerpc/boot/simpleboot.c

@@ -23,6 +23,8 @@
 
 BSS_STACK(4*1024);
 
+extern int platform_specific_init(void) __attribute__((weak));
+
 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 		   unsigned long r6, unsigned long r7)
 {
@@ -80,5 +82,9 @@ void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 
 	/* prepare the device tree and find the console */
 	fdt_init(_dtb_start);
+
+	if (platform_specific_init)
+		platform_specific_init();
+
 	serial_console_init();
 }

arch/powerpc/boot/virtex.c

+/*
+ * The platform specific code for virtex devices since a boot loader is not
+ * always used.
+ *
+ * (C) Copyright 2008 Xilinx, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include "ops.h"
+#include "io.h"
+#include "stdio.h"
+
+#define UART_DLL		0	/* Out: Divisor Latch Low */
+#define UART_DLM		1	/* Out: Divisor Latch High */
+#define UART_FCR		2	/* Out: FIFO Control Register */
+#define UART_FCR_CLEAR_RCVR 	0x02 	/* Clear the RCVR FIFO */
+#define UART_FCR_CLEAR_XMIT	0x04 	/* Clear the XMIT FIFO */
+#define UART_LCR		3	/* Out: Line Control Register */
+#define UART_MCR		4	/* Out: Modem Control Register */
+#define UART_MCR_RTS		0x02 	/* RTS complement */
+#define UART_MCR_DTR		0x01 	/* DTR complement */
+#define UART_LCR_DLAB		0x80 	/* Divisor latch access bit */
+#define UART_LCR_WLEN8		0x03 	/* Wordlength: 8 bits */
+
+static int virtex_ns16550_console_init(void *devp)
+{
+	unsigned char *reg_base;
+	u32 reg_shift, reg_offset, clk, spd;
+	u16 divisor;
+	int n;
+
+	if (dt_get_virtual_reg(devp, (void **)&reg_base, 1) < 1)
+		return -1;
+
+	n = getprop(devp, "reg-offset", &reg_offset, sizeof(reg_offset));
+	if (n == sizeof(reg_offset))
+		reg_base += reg_offset;
+
+	n = getprop(devp, "reg-shift", &reg_shift, sizeof(reg_shift));
+	if (n != sizeof(reg_shift))
+		reg_shift = 0;
+
+	n = getprop(devp, "current-speed", (void *)&spd, sizeof(spd));
+	if (n != sizeof(spd))
+		spd = 9600;
+
+	/* should there be a default clock rate?*/
+	n = getprop(devp, "clock-frequency", (void *)&clk, sizeof(clk));
+	if (n != sizeof(clk))
+		return -1;
+
+	divisor = clk / (16 * spd);
+
+	/* Access baud rate */
+	out_8(reg_base + (UART_LCR << reg_shift), UART_LCR_DLAB);
+
+	/* Baud rate based on input clock */
+	out_8(reg_base + (UART_DLL << reg_shift), divisor & 0xFF);
+	out_8(reg_base + (UART_DLM << reg_shift), divisor >> 8);
+
+	/* 8 data, 1 stop, no parity */
+	out_8(reg_base + (UART_LCR << reg_shift), UART_LCR_WLEN8);
+
+	/* RTS/DTR */
+	out_8(reg_base + (UART_MCR << reg_shift), UART_MCR_RTS | UART_MCR_DTR);
+
+	/* Clear transmitter and receiver */
+	out_8(reg_base + (UART_FCR << reg_shift),
+				UART_FCR_CLEAR_XMIT | UART_FCR_CLEAR_RCVR);
+	return 0;
+}
+
+/* For virtex, the kernel may be loaded without using a bootloader and if so
+   some UARTs need more setup than is provided in the normal console init
+*/
+int platform_specific_init(void)
+{
+	void *devp;
+	char devtype[MAX_PROP_LEN];
+	char path[MAX_PATH_LEN];
+
+	devp = finddevice("/chosen");
+	if (devp == NULL)
+		return -1;
+
+	if (getprop(devp, "linux,stdout-path", path, MAX_PATH_LEN) > 0) {
+		devp = finddevice(path);
+		if (devp == NULL)
+			return -1;
+
+		if ((getprop(devp, "device_type", devtype, sizeof(devtype)) > 0)
+				&& !strcmp(devtype, "serial")
+				&& (dt_is_compatible(devp, "ns16550")))
+				virtex_ns16550_console_init(devp);
+	}
+	return 0;
+}

arch/powerpc/boot/wrapper

@@ -207,7 +207,15 @@ adder875-redboot)
     binary=y
     ;;
 simpleboot-virtex405-*)
-    platformo="$object/virtex405-head.o $object/simpleboot.o"
+    platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
+    binary=y
+    ;;
+simpleboot-virtex440-*)
+    platformo="$object/simpleboot.o $object/virtex.o"
+    binary=y
+    ;;
+simpleboot-*)
+    platformo="$object/simpleboot.o"
     binary=y
     ;;
 asp834x-redboot)

arch/powerpc/kernel/cputable.c

@@ -1447,6 +1447,16 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.machine_check		= machine_check_440A,
 		.platform		= "ppc440",
 	},
+	{ /* 440 in Xilinx Virtex-5 FXT */
+		.pvr_mask		= 0xfffffff0,
+		.pvr_value		= 0x7ff21910,
+		.cpu_name		= "440 in Virtex-5 FXT",
+		.cpu_features		= CPU_FTRS_44X,
+		.cpu_user_features	= COMMON_USER_BOOKE,
+		.icache_bsize		= 32,
+		.dcache_bsize		= 32,
+		.platform		= "ppc440",
+	},
 	{ /* 460EX */
 		.pvr_mask		= 0xffff0002,
 		.pvr_value		= 0x13020002,

arch/powerpc/platforms/44x/Kconfig

@@ -111,6 +111,22 @@ config YOSEMITE
 #	help
 #	  This option enables support for the IBM PPC440GX evaluation board.
 
+config XILINX_VIRTEX440_GENERIC_BOARD
+	bool "Generic Xilinx Virtex 440 board"
+	depends on 44x
+	default n
+	select XILINX_VIRTEX_5_FXT
+	help
+	  This option enables generic support for Xilinx Virtex based boards
+	  that use a 440 based processor in the Virtex 5 FXT FPGA architecture.
+
+	  The generic virtex board support matches any device tree which
+	  specifies 'xlnx,virtex440' in its compatible field.  This includes
+	  the Xilinx ML5xx reference designs using the powerpc core.
+
+	  Most Virtex 5 designs should use this unless it needs to do some
+	  special configuration at board probe time.
+
 # 44x specific CPU modules, selected based on the board above.
 config 440EP
 	bool
@@ -161,3 +177,13 @@ config 460EX
 # 44x errata/workaround config symbols, selected by the CPU models above
 config IBM440EP_ERR42
 	bool
+
+# Xilinx specific config options.
+config XILINX_VIRTEX
+	bool
+
+# Xilinx Virtex 5 FXT FPGA architecture, selected by a Xilinx board above
+config XILINX_VIRTEX_5_FXT
+	bool
+	select XILINX_VIRTEX
+

arch/powerpc/platforms/44x/Makefile

@@ -10,3 +10,4 @@ obj-$(CONFIG_RAINIER)	+= rainier.o
 obj-$(CONFIG_WARP)	+= warp.o
 obj-$(CONFIG_WARP)	+= warp-nand.o
 obj-$(CONFIG_CANYONLANDS) += canyonlands.o
+obj-$(CONFIG_XILINX_VIRTEX_5_FXT) += virtex.o

arch/powerpc/platforms/44x/virtex.c

+/*
+ * Xilinx Virtex 5FXT based board support, derived from
+ * the Xilinx Virtex (IIpro & 4FX) based board support
+ *
+ * Copyright 2007 Secret Lab Technologies Ltd.
+ * Copyright 2008 Xilinx, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <asm/machdep.h>
+#include <asm/prom.h>
+#include <asm/time.h>
+#include <asm/xilinx_intc.h>
+#include <asm/reg.h>
+#include <asm/ppc4xx.h>
+#include "44x.h"
+
+static struct of_device_id xilinx_of_bus_ids[] __initdata = {
+	{ .compatible = "simple-bus", },
+	{ .compatible = "xlnx,plb-v46-1.00.a", },
+	{ .compatible = "xlnx,plb-v46-1.02.a", },
+	{ .compatible = "xlnx,plb-v34-1.01.a", },
+	{ .compatible = "xlnx,plb-v34-1.02.a", },
+	{ .compatible = "xlnx,opb-v20-1.10.c", },
+	{ .compatible = "xlnx,dcr-v29-1.00.a", },
+	{ .compatible = "xlnx,compound", },
+	{}
+};
+
+static int __init virtex_device_probe(void)
+{
+	of_platform_bus_probe(NULL, xilinx_of_bus_ids, NULL);
+
+	return 0;
+}
+machine_device_initcall(virtex, virtex_device_probe);
+
+static int __init virtex_probe(void)
+{
+	unsigned long root = of_get_flat_dt_root();
+
+	if (!of_flat_dt_is_compatible(root, "xlnx,virtex440"))
+		return 0;
+
+	return 1;
+}
+
+define_machine(virtex) {
+	.name			= "Xilinx Virtex440",
+	.probe			= virtex_probe,
+	.init_IRQ		= xilinx_intc_init_tree,
+	.get_irq		= xilinx_intc_get_irq,
+	.calibrate_decr		= generic_calibrate_decr,
+	.restart		= ppc4xx_reset_system,
+};