SPL: Port SPL framework to powerpc

This patchset ports the SPL framework to powerpc. Its based on the SPL generalization lately done by Tom Rini. The patches is based on the current "master" branch.

Additionally, a new MPC5200 board port is included, the a3m071 board port. This board port uses this SPL framework mainly to speed up booting into the OS (Linux of course). Detection of Linux vs. U-Boot booting is done here by checking the environment variable "boot_os". If "boot_os" is set to "yes", then the OS (Linux) is booted. Otherwise the "real" U-Boot is booted.

Tom, what do you think? I would really like to get this included now. Would you prefer if I would push this patch series into a git repo where you could pull from?

Thanks,
Stefan

Changes in v5:
- Remove timer_init() for PPC systems
- Remove some unneeded defines from a3m071.h (e.g. LIME related)
- Configure PCS2 not for SPI as default

Changes in v4:
- Build spl.o only for SPL image
- getenv_f not extracted into separate file. Only Makefile additions for SPL_BUILD needed.
- Add remark to call "fdt chosen" to board/a3m071/README
- Configure PCS2 as CODEC2 (SPI)
- Drop patch fdt: cmd_fdt: Call fdt_chosen() from "fdt boardsetup"

Changes in v3:
- Rebased on current master plus SPL framework v7
- Don't use special MPC5xxx memcpy in SPL
- Move linker symbols to header spl.h (checkpatch)

Changes in v2:
- Rebased on Tom's SPL framework patches v4
- Add option to skip copying of the mkimage header
- Rebased on Tom's SPL framework patches v4
- Rebased on Tom's SPL framework patches v4
- a3m071 build: Concat SPL binary and u-boot.img directly (no padding)

Stefan Roese (7):
powerpc: Extract EPAPR_MAGIC constants into processor.h
SPL: Port SPL framework to powerpc
env: Enable getenv_f() for SPL_BUILD
mpc5200: Add SPL support
mpc5200: Add a3m071 board support
Makefile: Add possibility to set entry-point for u-boot.img
Makefile: Add target for combined spl/u-boot.bin & u-boot.img

 MAINTAINERS                             |   2 +
 Makefile                                |  14 +-
 arch/powerpc/cpu/mpc5xxx/Makefile       |   4 +
 arch/powerpc/cpu/mpc5xxx/spl_boot.c     |  79 +++++++
 arch/powerpc/cpu/mpc5xxx/start.S        |  22 ++
 arch/powerpc/cpu/mpc5xxx/u-boot-spl.lds |  57 +++++
 arch/powerpc/include/asm/processor.h    |   6 +
 arch/powerpc/include/asm/spl.h          |  31 +++
 arch/powerpc/lib/Makefile               |  14 ++
 arch/powerpc/lib/bootm.c                |   6 -
 arch/powerpc/lib/spl.c                  |  42 ++++
 board/a3m071/Makefile                   |  36 +++
 board/a3m071/README                     |  80 +++++++
 board/a3m071/a3m071.c                   | 335 ++++++++++++++++++++++++++++
 board/a3m071/mt46v16m16-75.h            |  32 +++
 boards.cfg                              |   1 +
 common/Makefile                         |   3 +
 common/spl/spl.c                        |  16 ++
 include/configs/a3m071.h                | 380 ++++++++++++++++++++++++++++++++
 19 files changed, 1153 insertions(+), 7 deletions(-)
 create mode 100644 arch/powerpc/cpu/mpc5xxx/spl_boot.c
 create mode 100644 arch/powerpc/cpu/mpc5xxx/u-boot-spl.lds
 create mode 100644 arch/powerpc/include/asm/spl.h
 create mode 100644 arch/powerpc/lib/spl.c
 create mode 100644 board/a3m071/Makefile
 create mode 100644 board/a3m071/README
 create mode 100644 board/a3m071/a3m071.c
 create mode 100644 board/a3m071/mt46v16m16-75.h
 create mode 100644 include/configs/a3m071.h

1.8.0

By extracting these defines into a header, they can be re-used by other C sources as well. This will be done by the SPL framework OS boot support.

---

 arch/powerpc/include/asm/processor.h | 6 ++++++
 arch/powerpc/lib/bootm.c             | 6 ------
 2 files changed, 6 insertions(+), 6 deletions(-)

index 7aa3231..19fe250 100644
@@ -1342,4 +1342,10 @@ void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val);
 #endif
 #endif /* CONFIG_MACH_SPECIFIC */
 
+#if defined(CONFIG_MPC85xx) || defined(CONFIG_440)
+ #define EPAPR_MAGIC	(0x45504150)
+#else
+ #define EPAPR_MAGIC	(0x65504150)
+#endif
+
 #endif /* __ASM_PPC_PROCESSOR_H */

index 53dc4df..e3fee0b 100644
@@ -87,12 +87,6 @@ static void boot_jump_linux(bootm_headers_t *images)
 		 *   r8: 0
 		 *   r9: 0
 		 */
-#if defined(CONFIG_MPC85xx) || defined(CONFIG_440)
- #define EPAPR_MAGIC	(0x45504150)
-#else
- #define EPAPR_MAGIC	(0x65504150)
-#endif
-
 		debug ("   Booting using OF flat tree...\n");
 		WATCHDOG_RESET ();
 		(*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,

1.8.0

release.S:354:0: warning: "EPAPR_MAGIC" redefined [enabled by default] .../P2020RDB-PC_36BIT/include2/asm/processor.h:1346:0:
note: this is the location of the previous definition

Please fix, thanks!

Tom
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Hi Tom,

Yes, sorry. Will send a new version soon.

Thanks,
Stefan

This patch enables the SPL framework to be used on powerpc platforms and not only ARM.

timer_init() does not exist on PPC systems. The timer (decrementer) is initialized and enabled in interrupt_init() here. And currently interrupt_init() is called after relocation to SDRAM. Since the only powerpc SPL implementation (a3m071) doesn't need a timer, let's remove this timer_init() call for PPC systems.

---
Changes in v5:
- Remove timer_init() for PPC systems

Changes in v4:
- Build spl.o only for SPL image

Changes in v2:
- Rebased on Tom's SPL framework patches v4
- Add option to skip copying of the mkimage header

 arch/powerpc/lib/Makefile |  4 ++++
 arch/powerpc/lib/spl.c    | 42 ++++++++++++++++++++++++++++++++++++++++++
 common/spl/spl.c          | 16 ++++++++++++++++
 3 files changed, 62 insertions(+)
 create mode 100644 arch/powerpc/lib/spl.c

index 808021c..1beecf6 100644
@@ -64,6 +64,10 @@ $(obj)ppcstring.o: AFLAGS += -Dmemcpy=__memcpy
 COBJS-y += memcpy_mpc5200.o
 endif
 
+ifdef CONFIG_SPL_BUILD
+COBJS-$(CONFIG_SPL_FRAMEWORK) += spl.o
+endif
+
 COBJS	+= $(sort $(COBJS-y))
 
 SRCS	:= $(GLSOBJS:.o=.S) $(GLCOBJS:.o=.c) \

index 0d829c0..0d316e3 100644
@@ -74,6 +74,16 @@ __weak int spl_start_uboot(void)
 }
 #endif
 
+/*
+ * Weak default function for board specific cleanup/preparation before
+ * Linux boot. Some boards/platforms might not need it, so just provide
+ * an empty stub here.
+ */
+__weak void spl_board_prepare_for_linux(void)
+{
+	/* Nothing to do! */
+}
+
 void spl_parse_image_header(const struct image_header *header)
 {
 	u32 header_size = sizeof(struct image_header);

@@ -155,7 +165,13 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
 			CONFIG_SYS_SPL_MALLOC_SIZE);
 #endif
 
+#ifndef CONFIG_PPC
+	/*
+	 * timer_init() does not exist on PPC systems. The timer is initialized
+	 * and enabled (decrementer) in interrupt_init() here.
+	 */
 	timer_init();
+#endif
 
 #ifdef CONFIG_SPL_BOARD_INIT
 	spl_board_init();

1.8.0

With this patch, getenv_f() can be included easily into the SPL binary. With this, SPL boards can now use getenv_f() to read environment variables (e.g. to detect if the OS or U-Boot shall be executed).

In the approach this is done for env stored in NOR flash, as this will be used by an upcoming MPC5200 board port.

---
Changes in v4:
- getenv_f not extracted into separate file. Only Makefile additions for SPL_BUILD needed.

Changes in v3:
- Rebased on current master plus SPL framework v7

 common/Makefile | 3 +++
 1 file changed, 3 insertions(+)

index eac6360..e76f2e1 100644
@@ -199,6 +199,9 @@ COBJS-$(CONFIG_CMD_DFU) += cmd_dfu.o
 endif
 
 ifdef CONFIG_SPL_BUILD
+COBJS-y += cmd_nvedit.o
+COBJS-y += env_common.o
+COBJS-$(CONFIG_ENV_IS_IN_FLASH) += env_flash.o
 COBJS-$(CONFIG_SPL_YMODEM_SUPPORT) += xyzModem.o
 COBJS-$(CONFIG_SPL_NET_SUPPORT) += cmd_nvedit.o
 COBJS-$(CONFIG_SPL_NET_SUPPORT) += env_common.o

1.8.0

This patch adds SPL booting support (NOR flash) for the MPC5200 platforms.

---
Changes in v3:
- Don't use special MPC5xxx memcpy in SPL
- Move linker symbols to header spl.h (checkpatch)

Changes in v2:
- Rebased on Tom's SPL framework patches v4

 arch/powerpc/cpu/mpc5xxx/Makefile       |  4 ++
 arch/powerpc/cpu/mpc5xxx/spl_boot.c     | 79 +++++++++++++++++++++++++++++++++
 arch/powerpc/cpu/mpc5xxx/start.S        | 22 +++++++++
 arch/powerpc/cpu/mpc5xxx/u-boot-spl.lds | 57 ++++++++++++++++++++++++
 arch/powerpc/include/asm/spl.h          | 31 +++++++++++++
 arch/powerpc/lib/Makefile               | 10 +++++
 6 files changed, 203 insertions(+)
 create mode 100644 arch/powerpc/cpu/mpc5xxx/spl_boot.c
 create mode 100644 arch/powerpc/cpu/mpc5xxx/u-boot-spl.lds
 create mode 100644 arch/powerpc/include/asm/spl.h

index 1a088b7..8de2c13 100644
@@ -41,6 +41,10 @@ COBJS-y += speed.o
 COBJS-$(CONFIG_CMD_USB) += usb_ohci.o
 COBJS-$(CONFIG_CMD_USB) += usb.o
 
+ifdef CONFIG_SPL_BUILD
+COBJS-y += spl_boot.o
+endif
+
 SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS-y))
 START	:= $(addprefix $(obj),$(SSTART) $(CSTART))

index 51cc4e2..ad5bc0a 100644
@@ -50,6 +50,7 @@
 #define MSR_KERNEL (MSR_FP|MSR_ME|MSR_RI)
 #endif
 
+#ifndef CONFIG_SPL_BUILD
 /*
  * Set up GOT: Global Offset Table
  *

@@ -68,6 +69,7 @@
 	GOT_ENTRY(__bss_end__)
 	GOT_ENTRY(__bss_start)
 	END_GOT
+#endif
 
 /*
  * Version string

@@ -84,6 +86,18 @@ version_string:
 	. = EXC_OFF_SYS_RESET
 	.globl	_start
 _start:
+
+#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
+	/*
+	 * This is the entry of the real U-Boot from a board port
+	 * that supports SPL booting on the MPC5200. We only need
+	 * to call board_init_f() here. Everything else has already
+	 * been done in the SPL u-boot version.
+	 */
+	GET_GOT			/* initialize GOT access		*/
+	bl	board_init_f	/* run 1st part of board init code (in Flash)*/
+	/* NOTREACHED - board_init_f() does not return */
+#else
 	mfmsr	r5			/* save msr contents		*/
 
 	/* Move CSBoot and adjust instruction pointer                   */

@@ -152,7 +166,9 @@ lowboot_reentry:
 	/* Be careful to keep code relocatable !			*/
 	/*--------------------------------------------------------------*/
 
+#ifndef CONFIG_SPL_BUILD
 	GET_GOT			/* initialize GOT access		*/
+#endif
 
 	/* r3: IMMR */
 	bl	cpu_init_f	/* run low-level CPU init code (in Flash)*/

@@ -160,7 +176,9 @@ lowboot_reentry:
 	bl	board_init_f	/* run 1st part of board init code (in Flash)*/
 
 	/* NOTREACHED - board_init_f() does not return */
+#endif
 
+#ifndef CONFIG_SPL_BUILD
 /*
  * Vector Table
  */

@@ -333,6 +351,7 @@ int_return:
 	lwz	r1,GPR1(r1)
 	SYNC
 	rfi
+#endif /* CONFIG_SPL_BUILD */
 
 /*
  * This code initialises the MPC5xxx processor core

@@ -522,6 +541,7 @@ get_pvr:
 	mfspr	r3, PVR
 	blr
 
+#ifndef CONFIG_SPL_BUILD
 /*------------------------------------------------------------------------------*/
 
 /*

@@ -759,3 +779,5 @@ trap_init:
 
 	mtlr	r4			/* restore link register    */
 	blr
+
+#endif /* CONFIG_SPL_BUILD */

new file mode 100644
index 0000000..f43bc23
@@ -0,0 +1,31 @@
+/*
+ * (C) Copyright 2012
+ * Texas Instruments, <www.ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#ifndef	_ASM_SPL_H_
+#define	_ASM_SPL_H_
+
+#define BOOT_DEVICE_NOR		1
+
+/* Linker symbols */
+extern char __bss_start[], __bss_end__[];
+
+#endif

index 1beecf6..fa62835 100644
@@ -44,7 +44,9 @@ SOBJS-y	+= ticks.o
 SOBJS-y	+= reloc.o
 
 COBJS-$(CONFIG_BAT_RW) += bat_rw.o
+ifndef CONFIG_SPL_BUILD
 COBJS-y	+= board.o
+endif
 COBJS-y	+= bootm.o
 COBJS-y	+= cache.o
 COBJS-y	+= extable.o

@@ -53,6 +55,11 @@ COBJS-$(CONFIG_CMD_KGDB) += kgdb.o
 COBJS-${CONFIG_CMD_IDE} += ide.o
 COBJS-y	+= time.o
 
+# Don't include the MPC5xxx special memcpy into the
+# SPL U-Boot image. memcpy is used in the SPL NOR
+# flash driver. And we need the real, fast memcpy
+# here. We have no problems with unaligned access.
+ifndef CONFIG_SPL_BUILD
 # Workaround for local bus unaligned access problems
 # on MPC512x and MPC5200
 ifdef CONFIG_MPC512X

@@ -63,6 +70,7 @@ ifdef CONFIG_MPC5200
 $(obj)ppcstring.o: AFLAGS += -Dmemcpy=__memcpy
 COBJS-y += memcpy_mpc5200.o
 endif
+endif
 
 ifdef CONFIG_SPL_BUILD
 COBJS-$(CONFIG_SPL_FRAMEWORK) += spl.o

@@ -79,12 +87,14 @@ TARGETS += $(LIB)
 all: $(TARGETS)
 
 $(LIB):	$(obj).depend $(OBJS)
+ifndef CONFIG_SPL_BUILD
 	@if ! $(CROSS_COMPILE)readelf -S $(OBJS) | grep -q '\.fixup.*PROGBITS';\
 	then \
 		echo "ERROR: Your compiler doesn't generate .fixup sections!";\
 		echo "       Upgrade to a recent toolchain."; \
 		exit 1; \
 	fi;
+endif
 	$(call cmd_link_o_target, $(OBJS))
 
 $(LIBGCC): $(obj).depend $(LGOBJS)

1.8.0

This patch adds support for the a3m071 board based on the MPC5200.

---
Changes in v5:
- Remove some unneeded defines from a3m071.h (e.g. LIME related)
- Configure PCS2 not for SPI as default

Changes in v4:
- Add remark to call "fdt chosen" to board/a3m071/README
- Configure PCS2 as CODEC2 (SPI)

Changes in v2:
- Rebased on Tom's SPL framework patches v4
- a3m071 build: Concat SPL binary and u-boot.img directly (no padding)

 MAINTAINERS                  |   2 +
 board/a3m071/Makefile        |  36 ++++
 board/a3m071/README          |  80 +++++++++
 board/a3m071/a3m071.c        | 335 ++++++++++++++++++++++++++++++++++++++
 board/a3m071/mt46v16m16-75.h |  32 ++++
 boards.cfg                   |   1 +
 include/configs/a3m071.h     | 380 +++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 866 insertions(+)
 create mode 100644 board/a3m071/Makefile
 create mode 100644 board/a3m071/README
 create mode 100644 board/a3m071/a3m071.c
 create mode 100644 board/a3m071/mt46v16m16-75.h
 create mode 100644 include/configs/a3m071.h

index 1b2da94..3ff9bc3 100644
@@ -393,6 +393,8 @@ Ricardo Ribalda <[email protected]>
 
 Stefan Roese <[email protected]>
 
+	a3m071		MPC5200
+
 	P3M7448		MPC7448
 
 	uc100		MPC857

new file mode 100644
index 0000000..6f961fb
@@ -0,0 +1,36 @@
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(BOARD).o
+
+COBJS	:= $(BOARD).o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
+$(LIB):	$(obj).depend $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################

new file mode 100644
index 0000000..e49e996
@@ -0,0 +1,32 @@
+/*
+ * (C) Copyright 2004
+ * Mark Jonas, Freescale Semiconductor, mark.jonas at motorola.com.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#define SDRAM_DDR		/* is DDR */
+
+#if defined(CONFIG_MPC5200)
+/* Settings for XLB = 132 MHz */
+#define SDRAM_MODE	0x018D0000
+#define SDRAM_EMODE	0x40090000
+#define SDRAM_CONTROL	0x704f0f00
+#define SDRAM_CONFIG1	0x73722930
+#define SDRAM_CONFIG2	0x47770000
+#define SDRAM_TAPDELAY	0x10000000
+
+#else
+#error CONFIG_MPC5200 not defined
+#endif

index 3e19647..ada6c63 100644
@@ -458,6 +458,7 @@ mpc5121ads                   powerpc     mpc512x     mpc5121ads          freesca
 mpc5121ads_rev2              powerpc     mpc512x     mpc5121ads          freescale      -           mpc5121ads:MPC5121ADS_REV2
 cmi_mpc5xx                   powerpc     mpc5xx      cmi
 PATI                         powerpc     mpc5xx      pati                mpl
+a3m071                       powerpc     mpc5xxx     a3m071
 a4m072                       powerpc     mpc5xxx     a4m072
 BC3450                       powerpc     mpc5xxx     bc3450
 canmb                        powerpc     mpc5xxx

1.8.0

This patch enabled boards using the SPL framework to set an entry point in the U-Boot mkimage image "u-boot.img". Until now the entry point in the header has been set to 0. By setting CONFIG_SYS_UBOOT_START in the board header, boards can override this default location.

This will be used by the upcoming a3m071 MPC5200 board port.

---

 Makefile | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

index 328347d..280d7c0 100644
@@ -444,9 +444,18 @@ $(obj)u-boot.ldr.hex:	$(obj)u-boot.ldr
 $(obj)u-boot.ldr.srec:	$(obj)u-boot.ldr
 		$(OBJCOPY) ${OBJCFLAGS} -O srec $< $@ -I binary
 
+#
+# U-Boot entry point, needed for booting of full-blown U-Boot
+# from the SPL U-Boot version.
+#
+ifndef CONFIG_SYS_UBOOT_START
+CONFIG_SYS_UBOOT_START := 0
+endif
+
 $(obj)u-boot.img:	$(obj)u-boot.bin
 		$(obj)tools/mkimage -A $(ARCH) -T firmware -C none \
-		-O u-boot -a $(CONFIG_SYS_TEXT_BASE) -e 0 \
+		-O u-boot -a $(CONFIG_SYS_TEXT_BASE) \
+		-e $(CONFIG_SYS_UBOOT_START) \
 		-n $(shell sed -n -e 's/.*U_BOOT_VERSION//p' $(VERSION_FILE) | \
 			sed -e 's/"[	 ]*$$/ for $(BOARD) board"/') \
 		-d $< $@

1.8.0

This new make target "u-boot-img.bin" consists of the U-Boot SPL image with the real, full-blown U-Boot image directly attached to it. The full-blown U-Boot image has the mkimage header included, with its load-address and entry-point.

This will be used by the upcoming a3m071 MPC5200 board port.

---
Changes in v4:
- Drop patch fdt: cmd_fdt: Call fdt_chosen() from "fdt boardsetup"

 Makefile | 3 +++
 1 file changed, 3 insertions(+)

index 280d7c0..d472060 100644
@@ -536,6 +536,9 @@ $(obj)u-boot-nodtb-tegra.bin:	$(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
 endif
 endif
 
+$(obj)u-boot-img.bin: $(obj)spl/u-boot-spl.bin $(obj)u-boot.img
+		cat $(obj)spl/u-boot-spl.bin $(obj)u-boot.img > $@
+
 ifeq ($(CONFIG_SANDBOX),y)
 GEN_UBOOT = \
 		cd $(LNDIR) && $(CC) $(SYMS) -T $(obj)u-boot.lds \

1.8.0

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Andy, can you comment on this series as well? I'm happy to pull it in from patchwork, just want one more set of eyes on it. Thanks!

- --
Tom

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Hi,

On Tue, 23 Oct 2012 10:28:28 +0200
Stefan Roese <[email protected]> wrote:
...

Applied this series to staging/agust at denx.de, rebased patch 7/7 when applying. Thanks!

Anatolij