[PATCH 1/4] bootwrapper: Add CONFIG_DEVICE_TREE

[PATCH 1/4] bootwrapper: Add CONFIG_DEVICE_TREE

[Scott Wood]

This provides a way to tell the bootwrapper makefile which device tree to
include by default.  The wrapper can still be invoked standalone to wrap
with a different device tree without reconfiguring the kernel, if that is
desired.

The user will only be asked to provide a device tree if the platform
selects CONFIG_WANT_DEVICE_TREE.

Signed-off-by: Scott Wood <scottwood@freescale.com>
---
Note that Kumar has said he's in favor of always asking (at least when
not on true OF) so that the dts name can be used from external build
scripts.  I'm not convinced that that's a good idea (after all, such
scripts will need other parameters (e.g. the u-boot target name) which
definitely should not go in the kernel .config); however, I don't care
all that much whether you pull this patch or the previous version (which
asked unconditionally).

 arch/powerpc/Kconfig |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 740892a..9fe636d 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -162,6 +162,7 @@ config PPC_83xx
 	select FSL_SOC
 	select 83xx
 	select PPC_FPU
+	select WANT_DEVICE_TREE
 
 config PPC_85xx
 	bool "Freescale 85xx"
@@ -591,6 +592,29 @@ config SECCOMP
 
 	  If unsure, say Y. Only embedded should say N here.
 
+config WANT_DEVICE_TREE
+	bool
+	default n
+
+config DEVICE_TREE
+	string "Static device tree source file"
+	depends on WANT_DEVICE_TREE
+	help
+	  This specifies the device tree source (.dts) file to be
+	  compiled and included when building the bootwrapper.  If a
+	  relative filename is given, then it will be relative to
+	  arch/powerpc/boot/dts.  If you are not using the bootwrapper,
+	  or do not need to build a dts into the bootwrapper, this
+	  field is ignored.
+
+	  For example, this is required when building a cuImage target
+	  for an older U-Boot, which cannot pass a device tree itself.
+	  Such a kernel will not work with a newer U-Boot that tries to
+	  pass a device tree (unless you tell it not to).  If your U-Boot
+	  does not mention a device tree in "help bootm", then use the
+	  cuImage target and specify a device tree here.  Otherwise, use
+	  the uImage target and leave this field blank.
+
 endmenu
 
 config ISA_DMA_API
-- 
1.5.0.3

[PATCH 2/4] bootwrapper: Add a cuboot platform and a cuImage target.

[Scott Wood]

The cuImage target will build a uImage with bootwrapper code and a device
tree.  The default device tree and platform file are determined by the
kernel configuration.

Signed-off-by: Scott Wood <scottwood@freescale.com>
---
This version of the patch handles "make clean" correctly.

 arch/powerpc/Makefile        |    2 +-
 arch/powerpc/boot/.gitignore |    3 +++
 arch/powerpc/boot/Makefile   |   13 +++++++++++--
 arch/powerpc/boot/wrapper    |   21 +++++++++++++++++++--
 4 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index a00fe72..e6c3add 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -148,7 +148,7 @@ all: $(KBUILD_IMAGE)
 
 CPPFLAGS_vmlinux.lds	:= -Upowerpc
 
-BOOT_TARGETS = zImage zImage.initrd uImage
+BOOT_TARGETS = zImage zImage.initrd uImage cuImage
 
 PHONY += $(BOOT_TARGETS)
 
diff --git a/arch/powerpc/boot/.gitignore b/arch/powerpc/boot/.gitignore
index 0734b2f..eec7af7 100644
--- a/arch/powerpc/boot/.gitignore
+++ b/arch/powerpc/boot/.gitignore
@@ -18,6 +18,9 @@ kernel-vmlinux.strip.c
 kernel-vmlinux.strip.gz
 mktree
 uImage
+cuImage
+cuImage.bin.gz
+cuImage.elf
 zImage
 zImage.chrp
 zImage.coff
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 928b88a..d602b7c 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -129,7 +129,7 @@ image-$(CONFIG_PPC_CELLEB)		+= zImage.pseries
 image-$(CONFIG_PPC_CHRP)		+= zImage.chrp
 image-$(CONFIG_PPC_EFIKA)		+= zImage.chrp
 image-$(CONFIG_PPC_PMAC)		+= zImage.pmac
-image-$(CONFIG_DEFAULT_UIMAGE)		+= uImage
+image-$(CONFIG_DEFAULT_UIMAGE)		+= uImage cuImage
 
 # For 32-bit powermacs, build the COFF and miboot images
 # as well as the ELF images.
@@ -162,6 +162,14 @@ $(obj)/zImage.initrd.ps3: vmlinux
 $(obj)/uImage: vmlinux $(wrapperbits)
 	$(call if_changed,wrap,uboot)
 
+cuboot-plat-y += unknown-platform
+
+dts = $(if $(shell echo $(CONFIG_) | grep '^/'),\
+       ,$(srctree)/$(src)/dts/)$(CONFIG_DEVICE_TREE)
+
+$(obj)/cuImage: vmlinux $(wrapperbits)
+	$(call if_changed,wrap,cuboot-$(word 1,$(cuboot-plat-y)),$(dts))
+
 $(obj)/zImage:		$(addprefix $(obj)/, $(image-y))
 	@rm -f $@; ln $< $@
 $(obj)/zImage.initrd:	$(addprefix $(obj)/, $(initrd-y))
@@ -171,7 +179,8 @@ install: $(CONFIGURE) $(image-y)
 	sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" $<
 
 # anything not in $(targets)
-clean-files += $(image-) $(initrd-) zImage zImage.initrd
+clean-files += $(image-) $(initrd-) zImage zImage.initrd \
+               cuImage.elf cuImage.bin.gz
 
 # clean up files cached by wrapper
 clean-kernel := vmlinux.strip vmlinux.bin
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index e4566bd..5cedd90 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -141,6 +141,9 @@ miboot|uboot)
     ksection=image
     isection=initrd
     ;;
+cuboot*)
+    gzip=
+    ;;
 esac
 
 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
@@ -161,13 +164,17 @@ fi
 vmz="$vmz$gzip"
 
 case "$platform" in
-uboot)
-    rm -f "$ofile"
+uboot|cuboot*)
     version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 	cut -d' ' -f3`
     if [ -n "$version" ]; then
 	version="-n Linux-$version"
     fi
+esac
+
+case "$platform" in
+uboot)
+    rm -f "$ofile"
     mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
 	$version -d "$vmz" "$ofile"
     if [ -z "$cacheit" ]; then
@@ -216,4 +223,14 @@ pmaccoff)
     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
     $object/hack-coff "$ofile"
     ;;
+cuboot*)
+    base=`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
+    entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | \
+           cut -d' ' -f3`
+    mv "$ofile" "$ofile".elf
+    ${CROSS}objcopy -O binary "$ofile".elf "$ofile".bin
+    gzip -f -9 "$ofile".bin
+    mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
+            $version -d "$ofile".bin.gz "$ofile"
+    ;;
 esac
-- 
1.5.0.3

[PATCH 3/4] bootwrapper: Add ppcboot.h.

[Scott Wood]

This file describes the bd_t struct, which is used by old versions of
U-boot to pass information to the kernel.  Platform code that needs to
interoperate with such firmware can use this; it should not be used for
anything new.

Signed-off-by: Scott Wood <scottwood@freescale.com>
---
 arch/powerpc/boot/ppcboot.h |  108 +++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 108 insertions(+), 0 deletions(-)
 create mode 100644 arch/powerpc/boot/ppcboot.h

diff --git a/arch/powerpc/boot/ppcboot.h b/arch/powerpc/boot/ppcboot.h
new file mode 100644
index 0000000..5290ff2
--- /dev/null
+++ b/arch/powerpc/boot/ppcboot.h
@@ -0,0 +1,108 @@
+/*
+ * This interface is used for compatibility with old U-boots *ONLY*.
+ * Please do not imitate or extend this.
+ */
+
+/*
+ * (C) Copyright 2000, 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 __PPCBOOT_H__
+#define __PPCBOOT_H__
+
+/*
+ * Board information passed to kernel from PPCBoot
+ *
+ * include/asm-ppc/ppcboot.h
+ */
+
+#include "types.h"
+
+typedef struct bd_info {
+	unsigned long	bi_memstart;	/* start of DRAM memory */
+	unsigned long	bi_memsize;	/* size	 of DRAM memory in bytes */
+	unsigned long	bi_flashstart;	/* start of FLASH memory */
+	unsigned long	bi_flashsize;	/* size	 of FLASH memory */
+	unsigned long	bi_flashoffset; /* reserved area for startup monitor */
+	unsigned long	bi_sramstart;	/* start of SRAM memory */
+	unsigned long	bi_sramsize;	/* size	 of SRAM memory */
+#if defined(TARGET_8xx) || defined(TARGET_CPM2) || defined(TARGET_85xx) ||\
+	defined(TARGET_83xx)
+	unsigned long	bi_immr_base;	/* base of IMMR register */
+#endif
+#if defined(TARGET_PPC_MPC52xx)
+	unsigned long   bi_mbar_base;   /* base of internal registers */
+#endif
+	unsigned long	bi_bootflags;	/* boot / reboot flag (for LynxOS) */
+	unsigned long	bi_ip_addr;	/* IP Address */
+	unsigned char	bi_enetaddr[6];	/* Ethernet address */
+	unsigned short	bi_ethspeed;	/* Ethernet speed in Mbps */
+	unsigned long	bi_intfreq;	/* Internal Freq, in MHz */
+	unsigned long	bi_busfreq;	/* Bus Freq, in MHz */
+#if defined(TARGET_CPM2)
+	unsigned long	bi_cpmfreq;	/* CPM_CLK Freq, in MHz */
+	unsigned long	bi_brgfreq;	/* BRG_CLK Freq, in MHz */
+	unsigned long	bi_sccfreq;	/* SCC_CLK Freq, in MHz */
+	unsigned long	bi_vco;		/* VCO Out from PLL, in MHz */
+#endif
+#if defined(TARGET_PPC_MPC52xx)
+	unsigned long   bi_ipbfreq;     /* IPB Bus Freq, in MHz */
+	unsigned long   bi_pcifreq;     /* PCI Bus Freq, in MHz */
+#endif
+	unsigned long	bi_baudrate;	/* Console Baudrate */
+#if defined(TARGET_4xx)
+	unsigned char	bi_s_version[4];	/* Version of this structure */
+	unsigned char	bi_r_version[32];	/* Version of the ROM (IBM) */
+	unsigned int	bi_procfreq;	/* CPU (Internal) Freq, in Hz */
+	unsigned int	bi_plb_busfreq;	/* PLB Bus speed, in Hz */
+	unsigned int	bi_pci_busfreq;	/* PCI Bus speed, in Hz */
+	unsigned char	bi_pci_enetaddr[6];	/* PCI Ethernet MAC address */
+#endif
+#if defined(TARGET_HYMOD)
+	hymod_conf_t	bi_hymod_conf;	/* hymod configuration information */
+#endif
+#if defined(TARGET_EVB64260) || defined(TARGET_405EP) || defined(TARGET_44x) || \
+	defined(TARGET_85xx) ||	defined(TARGET_83xx)
+	/* second onboard ethernet port */
+	unsigned char	bi_enet1addr[6];
+#define HAVE_ENET1ADDR
+#endif
+#if defined(TARGET_EVB64260) || defined(TARGET_440GX) || defined(TARGET_85xx)
+	/* third onboard ethernet ports */
+	unsigned char	bi_enet2addr[6];
+#define HAVE_ENET2ADDR
+#endif
+#if defined(TARGET_440GX)
+	/* fourth onboard ethernet ports */
+	unsigned char	bi_enet3addr[6];
+#define HAVE_ENET3ADDR
+#endif
+#if defined(TARGET_4xx)
+	unsigned int	bi_opbfreq;		/* OB clock in Hz */
+	int		bi_iic_fast[2];		/* Use fast i2c mode */
+#endif
+#if defined(TARGET_440GX)
+	int		bi_phynum[4];		/* phy mapping */
+	int		bi_phymode[4];		/* phy mode */
+#endif
+} bd_t;
+
+#define bi_tbfreq	bi_intfreq
+
+#endif	/* __PPCBOOT_H__ */
-- 
1.5.0.3

Re: [PATCH 3/4] bootwrapper: Add ppcboot.h.

[Wolfgang Denk]

In message <20070416232553.GB26693@ld0162-tx32.am.freescale.net> you wrote:
> This file describes the bd_t struct, which is used by old versions of
> U-boot to pass information to the kernel.  Platform code that needs to
> interoperate with such firmware can use this; it should not be used for
> anything new.
> 
> Signed-off-by: Scott Wood <scottwood@freescale.com>
> ---
>  arch/powerpc/boot/ppcboot.h |  108 +++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 108 insertions(+), 0 deletions(-)
>  create mode 100644 arch/powerpc/boot/ppcboot.h
> 
> diff --git a/arch/powerpc/boot/ppcboot.h b/arch/powerpc/boot/ppcboot.h
> new file mode 100644
> index 0000000..5290ff2
> --- /dev/null
> +++ b/arch/powerpc/boot/ppcboot.h

Shouldn't we finally get this straight and call the file "u-boot.h" as
it is called in U-Boot?

The PPCBoot projects has been discontinued for many years by now...


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
The man on tops walks a lonely street;  the  "chain"  of  command  is
often a noose.

Re: [PATCH 3/4] bootwrapper: Add ppcboot.h.

[Scott Wood]

Wolfgang Denk wrote:
> In message <20070416232553.GB26693@ld0162-tx32.am.freescale.net> you wrote:
>>diff --git a/arch/powerpc/boot/ppcboot.h b/arch/powerpc/boot/ppcboot.h
>>new file mode 100644
>>index 0000000..5290ff2
>>--- /dev/null
>>+++ b/arch/powerpc/boot/ppcboot.h
> 
> 
> Shouldn't we finally get this straight and call the file "u-boot.h" as
> it is called in U-Boot?

Probably...  though the ppcboot.h name does reinforce the legacy nature 
of the interface.  Maybe old-u-boot.h?

Paul, feel free to change the name of the file in the patch if you want.

-Scott

Re: [PATCH 3/4] bootwrapper: Add ppcboot.h.

[Paul Mackerras]

Wolfgang Denk writes:

> Shouldn't we finally get this straight and call the file "u-boot.h" as
> it is called in U-Boot?

Is it identical to the one in U-Boot?

Paul.

Re: [PATCH 3/4] bootwrapper: Add ppcboot.h.

[Scott Wood]

Paul Mackerras wrote:
> Wolfgang Denk writes:
> 
> 
>>Shouldn't we finally get this straight and call the file "u-boot.h" as
>>it is called in U-Boot?
> 
> 
> Is it identical to the one in U-Boot?

It's missing the MPC8220 and NX823 bits and the phynum/mode bits for 4xx 
other than 440GP (which I guess were added after the kernel's ppcboot.h 
forked), and u-boot's has been changed to have CONFIG_HAS_ETH1/2/etc. 
rather than a list of targets, but otherwise it appears to be 
functionally identical.

Do you want me to resubmit using the current u-boot file (as well as an 
updated 83xx platform file to define CONFIG_HAS_ETH1)?

-Scott

[PATCH 4/4] bootwrapper: cuboot for 83xx

[Scott Wood]

This adds cuboot support for MPC83xx platforms.

A device tree used with this must have linux,stdout-path in /chosen and
linux,network-index in any network device nodes that need mac addresses
assigned.

Signed-off-by: Scott Wood <scottwood@freescale.com>
---
 arch/powerpc/boot/Makefile      |    3 +-
 arch/powerpc/boot/cuboot-83xx.c |   68 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+), 1 deletions(-)
 create mode 100644 arch/powerpc/boot/cuboot-83xx.c

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index d602b7c..3e172ff 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -43,7 +43,7 @@ $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) \
 src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
 		ns16550.c serial.c simple_alloc.c div64.S util.S \
 		gunzip_util.c elf_util.c $(zlib) devtree.c
-src-plat := of.c
+src-plat := of.c cuboot-83xx.c
 src-boot := $(src-wlib) $(src-plat) empty.c
 
 src-boot := $(addprefix $(obj)/, $(src-boot))
@@ -162,6 +162,7 @@ $(obj)/zImage.initrd.ps3: vmlinux
 $(obj)/uImage: vmlinux $(wrapperbits)
 	$(call if_changed,wrap,uboot)
 
+cuboot-plat-$(CONFIG_83xx) += 83xx
 cuboot-plat-y += unknown-platform
 
 dts = $(if $(shell echo $(CONFIG_) | grep '^/'),\
diff --git a/arch/powerpc/boot/cuboot-83xx.c b/arch/powerpc/boot/cuboot-83xx.c
new file mode 100644
index 0000000..8f11d1e
--- /dev/null
+++ b/arch/powerpc/boot/cuboot-83xx.c
@@ -0,0 +1,68 @@
+/*
+ * Old U-boot compatibility for 83xx
+ *
+ * Author: Scott Wood <scottwood@freescale.com>
+ *
+ * Copyright (c) 2007 Freescale Semiconductor, 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 "stdio.h"
+
+#define TARGET_83xx
+#include "ppcboot.h"
+
+static bd_t bd;
+extern char _end[];
+extern char _dtb_start[], _dtb_end[];
+
+static void platform_fixups(void)
+{
+	void *soc;
+
+	dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
+	dt_fixup_mac_addresses(bd.bi_enetaddr, bd.bi_enet1addr);
+	dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
+
+	/* Unfortunately, the specific model number is encoded in the
+	 * soc node name in existing dts files -- once that is fixed,
+	 * this can do a simple path lookup.
+	 */
+	soc = find_node_by_devtype(NULL, "soc");
+	if (soc) {
+		void *serial = NULL;
+
+		setprop(soc, "bus-frequency", &bd.bi_busfreq,
+		        sizeof(bd.bi_busfreq));
+
+		while ((serial = find_node_by_devtype(serial, "serial"))) {
+			if (get_parent(serial) != soc)
+				continue;
+
+			setprop(serial, "clock-frequency", &bd.bi_busfreq,
+			        sizeof(bd.bi_busfreq));
+		}
+	}
+}
+
+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+                   unsigned long r6, unsigned long r7)
+{
+	unsigned long end_of_ram = bd.bi_memstart + bd.bi_memsize;
+	unsigned long avail_ram = end_of_ram - (unsigned long)_end;
+
+	memcpy(&bd, (bd_t *)r3, sizeof(bd));
+	loader_info.initrd_addr = r4;
+	loader_info.initrd_size = r4 ? r5 : 0;
+	loader_info.cmdline = (char *)r6;
+	loader_info.cmdline_len = r7 - r6;
+
+	simple_alloc_init(_end, avail_ram, 32, 64);
+	ft_init(_dtb_start, _dtb_end - _dtb_start, 32);
+	serial_console_init();
+	platform_ops.fixups = platform_fixups;
+}
-- 
1.5.0.3