[PATCH 00/12 v3] Add Pre-Bootloader support

[PATCH 00/12 v3] Add Pre-Bootloader support

[Jean-Christophe PLAGNIOL-VILLARD]

Hi,
v3:
	drop
	ARM: Separate assembler functions into their own section

	drop already applied
	decompress_unlzo: define decompress_unlzo as decompress

	update early malloc to the end of the malloc space

v2:

	add custom cppflags to pbl 
	on arm always the garbage collector

please pull
The following changes since commit d8ddfd069f99428244aff34e2ccebe9ed6a6a7a3:

  decompress_unlzo: define decompress_unlzo as decompress (2012-07-30 16:23:54 +0800)

are available in the git repository at:

  git://git.jcrosoft.org/barebox.git tags/pbl

for you to fetch changes up to 0d4fc07c84581f088b658ff9fbc1e275a3ada518:

  arm: always enable the garbage collector for pbl (2012-07-30 17:32:51 +0800)

----------------------------------------------------------------
Add pre-bootloader (pbl) image support

This allows for creating a pre-bootloader binary for
 - nand boot
 - mmc boot
 - compressed image

Currently on the compressed image is implemented the boot really on current lowlevel
init support. In a second step this could be move to the pbl c code with generic framework.

The pbl will be incharge of the lowlevel init if needed.
The barebox will skip it.

The decompressor support lzo and gzip and allow to add easly more.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

----------------------------------------------------------------
Jean-Christophe PLAGNIOL-VILLARD (10):
      kbuild: Init all relevant variables used in kbuild files so
      kbuild: add pre-bootloader (pbl) target
      Add pre-bootloader (pbl) image support
      pbl: discard unwind symbol if enable in barebox
      decompressor: import malloc/free implementation for linux 3.4
      ARM: add early malloc support needed by the decompressor
      compressed image: add gzip support
      at91: add lowlevel init to the pbl
      kbuild: allow to have custom cppflags for pbl
      arm: always enable the garbage collector for pbl

Sascha Hauer (2):
      Add compressed image support
      only compress default env in uncompressed images

 Makefile                            |   11 +++++++++--
 arch/arm/Kconfig                    |    2 ++
 arch/arm/Makefile                   |    8 ++++++++
 arch/arm/cpu/Makefile               |    1 +
 arch/arm/cpu/start.c                |  113 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 arch/arm/lib/Makefile               |    4 ++++
 arch/arm/lib/barebox.lds.S          |    3 ++-
 arch/arm/mach-at91/Makefile         |    2 ++
 arch/arm/pbl/Makefile               |   40 +++++++++++++++++++++++++++++++++++++++
 arch/arm/pbl/piggy.gzip.S           |    6 ++++++
 arch/arm/pbl/piggy.lzo.S            |    6 ++++++
 arch/arm/pbl/zbarebox.lds.S         |   74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 common/Kconfig                      |   34 +++++++++++++++++++++++++++++++++
 include/asm-generic/memory_layout.h |    1 +
 include/linux/decompress/mm.h       |   68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/decompress_inflate.c            |    1 +
 pbl/Makefile                        |    5 +++++
 pbl/misc.c                          |   14 ++++++++++++++
 pbl/string.c                        |  127 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 scripts/Makefile.build              |   73 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 scripts/Makefile.lib                |   14 ++++++++++++++
 21 files changed, 596 insertions(+), 11 deletions(-)
 create mode 100644 arch/arm/pbl/Makefile
 create mode 100644 arch/arm/pbl/piggy.gzip.S
 create mode 100644 arch/arm/pbl/piggy.lzo.S
 create mode 100644 arch/arm/pbl/zbarebox.lds.S
 create mode 100644 include/linux/decompress/mm.h
 create mode 100644 pbl/Makefile
 create mode 100644 pbl/misc.c
 create mode 100644 pbl/string.c

Beset Regards,
J.

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[PATCH 01/12] kbuild: Init all relevant variables used in kbuild files so

[Jean-Christophe PLAGNIOL-VILLARD]

import from linux 3.5-rc5

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 scripts/Makefile.build |   25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index f70e2b9..1a82c44 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -7,7 +7,30 @@ src := $(obj)
 PHONY := __build
 __build:
 
-# Read .config if it exist, otherwise ignore
+# Init all relevant variables used in kbuild files so
+# 1) they have correct type
+# 2) they do not inherit any value from the environment
+obj-y :=
+obj-m :=
+lib-y :=
+lib-m :=
+always :=
+targets :=
+subdir-y :=
+subdir-m :=
+EXTRA_AFLAGS   :=
+EXTRA_CFLAGS   :=
+EXTRA_CPPFLAGS :=
+EXTRA_LDFLAGS  :=
+asflags-y  :=
+ccflags-y  :=
+cppflags-y :=
+ldflags-y  :=
+
+subdir-asflags-y :=
+subdir-ccflags-y :=
+
+# Read auto.conf if it exists, otherwise ignore
 -include include/config/auto.conf
 
 include scripts/Kbuild.include
-- 
1.7.10.4


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[PATCH 02/12] kbuild: add pre-bootloader (pbl) target

[Jean-Christophe PLAGNIOL-VILLARD]

This will allow to link compiled object to the built-in-pbl.o across the source
tree that will be finally link to the pbl.

Now we compile the source %.c in pbl-%.o and provide -D__PBL__
so we can known in the source when it's compile for barebox or the pbl.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 Makefile               |    5 ++++-
 scripts/Makefile.build |   48 +++++++++++++++++++++++++++++++++++++++++++++---
 scripts/Makefile.lib   |   14 ++++++++++++++
 3 files changed, 63 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index ac5eaaf..168381d 100644
--- a/Makefile
+++ b/Makefile
@@ -481,6 +481,7 @@ barebox-alldirs	:= $(sort $(barebox-dirs) $(patsubst %/,%,$(filter %/, \
 		     $(core-n) $(core-) $(drivers-n) $(drivers-) \
 		     $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 
+pbl-common-y	:= $(patsubst %/, %/built-in-pbl.o, $(common-y))
 common-y	:= $(patsubst %/, %/built-in.o, $(common-y))
 
 # Build barebox
@@ -510,6 +511,8 @@ common-y	:= $(patsubst %/, %/built-in.o, $(common-y))
 # System.map is generated to document addresses of all kernel symbols
 
 barebox-common := $(common-y)
+barebox-pbl-common := $(pbl-common-y)
+export barebox-pbl-common
 barebox-all    := $(barebox-common)
 barebox-lds    := $(lds-y)
 
@@ -714,7 +717,7 @@ barebox.srec: barebox
 
 # The actual objects are generated when descending,
 # make sure no implicit rule kicks in
-$(sort $(barebox-head) $(barebox-common) ) $(barebox-lds): $(barebox-dirs) ;
+$(sort $(barebox-head) $(barebox-common) ) $(barebox-lds) $(barebox-pbl-common): $(barebox-dirs) ;
 
 # Handle descending into subdirectories listed in $(barebox-dirs)
 # Preset locale variables to speed up the build process. Limit locale
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 1a82c44..e5b7779 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -14,6 +14,7 @@ obj-y :=
 obj-m :=
 lib-y :=
 lib-m :=
+pbl-y :=
 always :=
 targets :=
 subdir-y :=
@@ -97,13 +98,19 @@ ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),)
 lib-target := $(obj)/lib.a
 endif
 
-ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(lib-target)),)
+ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(lib-target) $(pbl-y)),)
 builtin-target := $(obj)/built-in.o
 endif
 
+ifeq ($(CONFIG_PBL_IMAGE), y)
+ifneq ($(strip $(pbl-y) $(builtin-target)),)
+pbl-target := $(obj)/built-in-pbl.o
+endif
+endif
+
 # We keep a list of all modules in $(MODVERDIR)
 
-__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
+__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(pbl-target) $(extra-y)) \
 	 $(if $(KBUILD_MODULES),$(obj-m)) \
 	 $(subdir-ym) $(always)
 	@:
@@ -177,9 +184,11 @@ cmd_cc_symtypes_c	   = \
 # (See cmd_cc_o_c + relevant part of rule_cc_o_c)
 
 quiet_cmd_cc_o_c = CC $(quiet_modtag)  $@
+quiet_cmd_pbl_cc_o_c = PBLCC   $@
 
 ifndef CONFIG_MODVERSIONS
 cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
+cmd_pbl_cc_o_c = $(CC) -D__PBL__ $(c_flags) -c -o $@ $<
 
 else
 # When module versioning is enabled the following steps are executed:
@@ -220,8 +229,22 @@ define rule_cc_o_c
 	mv -f $(dot-target).tmp $(dot-target).cmd
 endef
 
+define rule_pbl_cc_o_c
+	$(call echo-cmd,checksrc) $(cmd_checksrc)			  \
+	$(call echo-cmd,pbl_cc_o_c) $(cmd_pbl_cc_o_c);			  \
+	$(cmd_modversions)						  \
+	scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,pbl_cc__o_c)' >    \
+	                                              $(dot-target).tmp;  \
+	rm -f $(depfile);						  \
+	mv -f $(dot-target).tmp $(dot-target).cmd
+endef
+
 # Built-in and composite module parts
 
+pbl-%.o: %.c
+	$(call cmd,force_checksrc)
+	$(call if_changed_rule,pbl_cc_o_c)
+
 %.o: %.c FORCE
 	$(call cmd,force_checksrc)
 	$(call if_changed_rule,cc_o_c)
@@ -258,10 +281,16 @@ cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<
 quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 
+quiet_cmd_pbl_as_o_S = PBLAS   $@
+cmd_pbl_as_o_S       = $(CC) -D__PBL__ $(a_flags) -c -o $@ $<
+
+pbl-%.o: %.S
+	$(call if_changed_dep,pbl_as_o_S)
+
 %.o: %.S FORCE
 	$(call if_changed_dep,as_o_S)
 
-targets += $(real-objs-y) $(real-objs-m) $(lib-y)
+targets += $(real-objs-y) $(real-objs-m) $(lib-y) $(pbl-y)
 targets += $(extra-y) $(MAKECMDGOALS) $(always)
 
 # Linker scripts preprocessor (.lds.S -> .lds)
@@ -294,6 +323,19 @@ $(builtin-target): $(obj-y) FORCE
 targets += $(builtin-target)
 endif # builtin-target
 
+ifdef pbl-target
+quiet_cmd_pbl_link_o_target = PBLLD   $@
+# If the list of objects to link is empty, just create an empty built-in-pbl.o
+cmd_pbl_link_o_target = $(if $(strip $(pbl-y)),\
+		      $(LD) $(ld_flags) -r -o $@ $(filter $(pbl-y), $^),\
+		      rm -f $@; $(AR) rcs $@)
+
+$(pbl-target): $(pbl-y) FORCE
+	$(call if_changed,pbl_link_o_target)
+
+targets += $(pbl-target)
+endif # pbl-target
+
 #
 # Rule to compile a set of .o files into one .a file
 #
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index b842c48..1a5b2b5 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -21,6 +21,17 @@ lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
 # o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
 #   and add the directory to the list of dirs to descend into: $(subdir-m)
 
+# for non dirs add pbl- prefix to the target
+# so we recompile the source with custom flags and custom quiet
+__pbl-y		:= $(notdir $(pbl-y))
+pbl-y		:= $(patsubst %.o,pbl-%.o,$(__pbl-y))
+# add subdir from $(obj-y) too so we do not need to have the dir define in
+# both $(obj-y) and $(pbl-y)
+__pbl-y		:= $(filter-out $(pbl-y), $(filter %/, $(obj-y)))
+pbl-y		+= $(__pbl-y)
+
+pbl-y		:= $(sort $(patsubst %/, %/built-in-pbl.o, $(pbl-y)))
+
 __subdir-y	:= $(patsubst %/,%,$(filter %/, $(obj-y)))
 subdir-y	+= $(__subdir-y)
 __subdir-m	:= $(patsubst %/,%,$(filter %/, $(obj-m)))
@@ -46,7 +57,9 @@ multi-objs   := $(multi-objs-y) $(multi-objs-m)
 
 # $(subdir-obj-y) is the list of objects in $(obj-y) which do not live
 # in the local directory
+__subdir-obj-y := $(foreach o,$(pbl-y),$(if $(filter-out $(o),$(notdir $(o))),$(o)))
 subdir-obj-y := $(foreach o,$(obj-y),$(if $(filter-out $(o),$(notdir $(o))),$(o)))
+subdir-obj-y += $(__subdir-obj-y)
 
 # $(obj-dirs) is a list of directories that contain object files
 obj-dirs := $(dir $(multi-objs) $(subdir-obj-y))
@@ -63,6 +76,7 @@ targets		:= $(addprefix $(obj)/,$(targets))
 obj-y		:= $(addprefix $(obj)/,$(obj-y))
 obj-m		:= $(addprefix $(obj)/,$(obj-m))
 lib-y		:= $(addprefix $(obj)/,$(lib-y))
+pbl-y		:= $(addprefix $(obj)/,$(pbl-y))
 subdir-obj-y	:= $(addprefix $(obj)/,$(subdir-obj-y))
 real-objs-y	:= $(addprefix $(obj)/,$(real-objs-y))
 real-objs-m	:= $(addprefix $(obj)/,$(real-objs-m))
-- 
1.7.10.4


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[PATCH 03/12] Add pre-bootloader (pbl) image support

[Jean-Christophe PLAGNIOL-VILLARD]

This allows for creating a pre-bootloader binary for
 - nand boot
 - mmc boot
 - compressed image

The pbl will be incharge of the lowlevel init if needed.
The barebox will skip it.

Import string functions from linux 3.4 (arch/arm/boot/compressed/string.c) and
implement a dummy panic.

For now on introduce dummy zbarebox* targets and c code that will contain later
the decompressor. This only implemeted on ARM.

This patch is based on Sascha Hauer <s.hauer@pengutronix.de>
Add compressed image support patch

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 Makefile                                           |    6 +-
 arch/arm/Kconfig                                   |    1 +
 arch/arm/Makefile                                  |    4 +
 arch/arm/cpu/Makefile                              |    1 +
 arch/arm/cpu/start.c                               |   43 ++++++-
 arch/arm/lib/Makefile                              |    4 +
 arch/arm/lib/barebox.lds.S                         |    3 +-
 arch/arm/pbl/Makefile                              |   25 ++++
 arch/arm/{lib/barebox.lds.S => pbl/zbarebox.lds.S} |   53 ++------
 common/Kconfig                                     |   30 +++++
 include/asm-generic/memory_layout.h                |    1 +
 pbl/Makefile                                       |    5 +
 pbl/misc.c                                         |   14 +++
 pbl/string.c                                       |  127 ++++++++++++++++++++
 14 files changed, 269 insertions(+), 48 deletions(-)
 create mode 100644 arch/arm/pbl/Makefile
 copy arch/arm/{lib/barebox.lds.S => pbl/zbarebox.lds.S} (60%)
 create mode 100644 pbl/Makefile
 create mode 100644 pbl/misc.c
 create mode 100644 pbl/string.c

diff --git a/Makefile b/Makefile
index 168381d..a102015 100644
--- a/Makefile
+++ b/Makefile
@@ -474,6 +474,8 @@ CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 # this default value
 export KBUILD_IMAGE ?= barebox
 
+common-$(CONFIG_PBL_IMAGE)	+= pbl/
+
 barebox-dirs	:= $(patsubst %/,%,$(filter %/, $(common-y)))
 
 barebox-alldirs	:= $(sort $(barebox-dirs) $(patsubst %/,%,$(filter %/, \
@@ -520,7 +522,7 @@ barebox-lds    := $(lds-y)
 # May be overridden by arch/$(ARCH)/Makefile
 quiet_cmd_barebox__ ?= LD      $@
       cmd_barebox__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_barebox) -o $@ \
-      -T $(barebox-lds) $(barebox-head)                         \
+      -T $(barebox-lds)                         \
       --start-group $(barebox-common) --end-group                  \
       $(filter-out $(barebox-lds) $(barebox-common) FORCE ,$^)
 
@@ -674,7 +676,9 @@ OBJCOPYFLAGS_barebox.bin = -O binary
 
 barebox.bin: barebox FORCE
 	$(call if_changed,objcopy)
+ifndef CONFIG_PBL_IMAGE
 	$(call cmd,check_file_size,$(CONFIG_BAREBOX_MAX_IMAGE_SIZE))
+endif
 
 ifdef CONFIG_X86
 barebox.S: barebox
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5acc36f..3d11497 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -4,6 +4,7 @@ config ARM
 	select HAS_MODULES
 	select HAVE_CONFIGURABLE_MEMORY_LAYOUT
 	select HAVE_CONFIGURABLE_TEXT_BASE
+	select HAVE_PBL_IMAGE
 	default y
 
 config ARM_AMBA
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index bf17203..80ef986 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -194,6 +194,10 @@ ifeq ($(CONFIG_ARCH_DAVINCI),y)
 KBUILD_IMAGE := barebox.ubl
 endif
 
+pbl := arch/arm/pbl
+zbarebox.S zbarebox.bin zbarebox: barebox.bin
+	$(Q)$(MAKE) $(build)=$(pbl) $(pbl)/$@
+
 all: $(KBUILD_IMAGE)
 
 archprepare: maketools
diff --git a/arch/arm/cpu/Makefile b/arch/arm/cpu/Makefile
index 93a34a9..939e6a7 100644
--- a/arch/arm/cpu/Makefile
+++ b/arch/arm/cpu/Makefile
@@ -15,3 +15,4 @@ obj-$(CONFIG_CPU_32v6) += cache-armv6.o
 obj-$(CONFIG_CPU_32v7) += cache-armv7.o
 obj-$(CONFIG_CACHE_L2X0) += cache-l2x0.o
 
+pbl-y += start.o
diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
index 112403e..49b1d5b 100644
--- a/arch/arm/cpu/start.c
+++ b/arch/arm/cpu/start.c
@@ -28,10 +28,34 @@
 #include <asm-generic/memory_layout.h>
 #include <asm/sections.h>
 
+#ifdef CONFIG_PBL_IMAGE
+void __naked __section(.text_head_entry) pbl_start(void)
+{
+	barebox_arm_head();
+}
+
+/*
+ * First function in the pbl image. We get here from
+ * the decompressor
+ */
+void __naked __section(.text_entry) start(void)
+{
+	u32 r;
+
+	/* Setup the stack */
+	r = STACK_BASE + STACK_SIZE - 16;
+	__asm__ __volatile__("mov sp, %0" : : "r"(r));
+	/* clear bss */
+	memset(__bss_start, 0, __bss_stop - __bss_start);
+
+	start_barebox();
+}
+#else
 void __naked __section(.text_entry) start(void)
 {
 	barebox_arm_head();
 }
+#endif
 
 /*
  * The actual reset vector. This code is position independent and usually
@@ -73,6 +97,14 @@ void __naked __bare_init reset(void)
 	board_init_lowlevel_return();
 }
 
+#ifdef __PBL__
+void barebox_pbl(uint32_t offset)
+{
+}
+#else
+void barebox_pbl(uint32_t offset) {}
+#endif
+
 /*
  * Board code can jump here by either returning from board_init_lowlevel
  * or by calling this function directly.
@@ -105,8 +137,11 @@ void __naked __section(.text_ll_return) board_init_lowlevel_return(void)
 	/* flush I-cache before jumping to the copied binary */
 	__asm__ __volatile__("mcr p15, 0, %0, c7, c5, 0" : : "r" (0));
 
-	/* call start_barebox with its absolute address */
-	r = (unsigned int)&start_barebox;
-	__asm__ __volatile__("mov pc, %0" : : "r"(r));
+	if (IS_ENABLED(CONFIG_PBL_IMAGE)) {
+		barebox_pbl(offset);
+	} else {
+		/* call start_barebox with its absolute address */
+		r = (unsigned int)&start_barebox;
+		__asm__ __volatile__("mov pc, %0" : : "r"(r));
+	}
 }
-
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 1eaf474..9d0ff7a 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -21,3 +21,7 @@ obj-$(CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS)	+= memset.o
 obj-$(CONFIG_ARM_UNWIND) += unwind.o
 obj-$(CONFIG_MODULES) += module.o
 extra-y += barebox.lds
+
+pbl-y	+= lib1funcs.o
+pbl-y	+= ashldi3.o
+pbl-y	+= div0.o
diff --git a/arch/arm/lib/barebox.lds.S b/arch/arm/lib/barebox.lds.S
index e0bae70..a69013f 100644
--- a/arch/arm/lib/barebox.lds.S
+++ b/arch/arm/lib/barebox.lds.S
@@ -31,8 +31,9 @@ SECTIONS
 {
 	. = TEXT_BASE;
 
+#ifndef CONFIG_PBL_IMAGE
 	PRE_IMAGE
-
+#endif
 	. = ALIGN(4);
 	.text      :
 	{
diff --git a/arch/arm/pbl/Makefile b/arch/arm/pbl/Makefile
new file mode 100644
index 0000000..9b364bb
--- /dev/null
+++ b/arch/arm/pbl/Makefile
@@ -0,0 +1,25 @@
+
+OBJCOPYFLAGS_zbarebox.bin = -O binary
+
+targets := zbarebox.lds zbarebox zbarebox.bin zbarebox.S
+
+$(obj)/zbarebox.bin:	$(obj)/zbarebox FORCE
+	$(call if_changed,objcopy)
+	$(call cmd,check_file_size,$(CONFIG_BAREBOX_MAX_IMAGE_SIZE))
+	@echo '  Barebox: $@ is ready'
+
+$(obj)/zbarebox.S: $(obj)/zbarebox FORCE
+	$(call if_changed,disasm)
+
+LDFLAGS_zbarebox	:= -Map zbarebox.map
+zbarebox-common := $(barebox-pbl-common)
+zbarebox-lds := $(obj)/zbarebox.lds
+
+quiet_cmd_zbarebox__ ?= LD      $@
+      cmd_zbarebox__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_zbarebox) -o $@ \
+      -T $(zbarebox-lds)                                           \
+      --start-group $(zbarebox-common) --end-group                 \
+      $(filter-out $(zbarebox-lds) $(zbarebox-common) FORCE ,$^)
+
+$(obj)/zbarebox: $(zbarebox-lds) $(zbarebox-common) FORCE
+	$(call if_changed,zbarebox__)
diff --git a/arch/arm/lib/barebox.lds.S b/arch/arm/pbl/zbarebox.lds.S
similarity index 60%
copy from arch/arm/lib/barebox.lds.S
copy to arch/arm/pbl/zbarebox.lds.S
index e0bae70..1cbcef4 100644
--- a/arch/arm/lib/barebox.lds.S
+++ b/arch/arm/pbl/zbarebox.lds.S
@@ -1,6 +1,5 @@
 /*
- * (C) Copyright 2000-2004
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * (C) Copyright 2012 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -23,13 +22,14 @@
  */
 
 #include <asm-generic/barebox.lds.h>
+#include <asm-generic/memory_layout.h>
 
 OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
-ENTRY(start)
+ENTRY(pbl_start)
 SECTIONS
 {
-	. = TEXT_BASE;
+	. = HEAD_TEXT_BASE;
 
 	PRE_IMAGE
 
@@ -38,15 +38,12 @@ SECTIONS
 	{
 		_stext = .;
 		_text = .;
-		*(.text_entry*)
+		*(.text_head_entry*)
 		__ll_return = .;
 		*(.text_ll_return*)
 		__bare_init_start = .;
 		*(.text_bare_init*)
 		__bare_init_end = .;
-		__exceptions_start = .;
-		KEEP(*(.text_exceptions*))
-		__exceptions_stop = .;
 		*(.text*)
 	}
 	BAREBOX_BARE_INIT_SIZE
@@ -54,48 +51,20 @@ SECTIONS
 	. = ALIGN(4);
 	.rodata : { *(.rodata*) }
 
-#ifdef CONFIG_ARM_UNWIND
-	/*
-	 * Stack unwinding tables
-	 */
-	. = ALIGN(8);
-	.ARM.unwind_idx : {
-		__start_unwind_idx = .;
-		*(.ARM.exidx*)
-		__stop_unwind_idx = .;
-	}
-	.ARM.unwind_tab : {
-		__start_unwind_tab = .;
-		*(.ARM.extab*)
-		__stop_unwind_tab = .;
-	}
-#endif
 	_etext = .;			/* End of text and rodata section */
 
 	. = ALIGN(4);
-	.data : { *(.data*) }
-
-	. = .;
-	__barebox_cmd_start = .;
-	.barebox_cmd : { BAREBOX_CMDS }
-	__barebox_cmd_end = .;
-
-	__barebox_magicvar_start = .;
-	.barebox_magicvar : { BAREBOX_MAGICVARS }
-	__barebox_magicvar_end = .;
-
-	__barebox_initcalls_start = .;
-	.barebox_initcalls : { INITCALLS }
-	__barebox_initcalls_end = .;
+	.piggydata : {
+		*(.piggydata)
+	}
 
-	__usymtab_start = .;
-	__usymtab : { BAREBOX_SYMS }
-	__usymtab_end = .;
+	. = ALIGN(4);
+	.data : { *(.data*) }
 
 	. = ALIGN(4);
 	__bss_start = .;
 	.bss : { *(.bss*) }
 	__bss_stop = .;
 	_end = .;
-	_barebox_image_size = __bss_start - TEXT_BASE;
+	_barebox_image_size = __bss_start - HEAD_TEXT_BASE;
 }
diff --git a/common/Kconfig b/common/Kconfig
index 7eb5b49..7b5a307 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -101,6 +101,36 @@ config ENVIRONMENT_VARIABLES
 
 menu "memory layout                 "
 
+config HAVE_PBL_IMAGE
+	bool
+
+config HAVE_IMAGE_COMPRESSION
+	bool
+
+config PBL_IMAGE
+	bool "Pre-Bootloader image"
+	depends on HAVE_PBL_IMAGE
+
+if PBL_IMAGE
+
+config IMAGE_COMPRESSION
+	bool "Compressed image"
+	depends on HAVE_IMAGE_COMPRESSION
+
+if IMAGE_COMPRESSION
+
+choice
+	prompt "Compression"
+
+config IMAGE_COMPRESSION_LZO
+	bool "lzo"
+
+endchoice
+
+endif
+
+endif
+
 config MMU
 	bool "Enable MMU"
 	help
diff --git a/include/asm-generic/memory_layout.h b/include/asm-generic/memory_layout.h
index 941cd42..eb1607f 100644
--- a/include/asm-generic/memory_layout.h
+++ b/include/asm-generic/memory_layout.h
@@ -13,6 +13,7 @@
 
 #endif
 
+#define HEAD_TEXT_BASE MALLOC_BASE
 #define MALLOC_SIZE CONFIG_MALLOC_SIZE
 #define STACK_SIZE  CONFIG_STACK_SIZE
 
diff --git a/pbl/Makefile b/pbl/Makefile
new file mode 100644
index 0000000..7169c6c
--- /dev/null
+++ b/pbl/Makefile
@@ -0,0 +1,5 @@
+#
+# only unsed by the pbl
+#
+pbl-y += misc.o
+pbl-y += string.o
diff --git a/pbl/misc.c b/pbl/misc.c
new file mode 100644
index 0000000..47e9cea
--- /dev/null
+++ b/pbl/misc.c
@@ -0,0 +1,14 @@
+#include <common.h>
+#include <init.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+
+void __noreturn panic(const char *fmt, ...)
+{
+	while(1);
+}
+
+void start_barebox(void)
+{
+}
diff --git a/pbl/string.c b/pbl/string.c
new file mode 100644
index 0000000..6787e82
--- /dev/null
+++ b/pbl/string.c
@@ -0,0 +1,127 @@
+/*
+ * arch/arm/boot/compressed/string.c
+ *
+ * Small subset of simple string routines
+ */
+
+#include <linux/types.h>
+
+void *memcpy(void *__dest, __const void *__src, size_t __n)
+{
+	int i = 0;
+	unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
+
+	for (i = __n >> 3; i > 0; i--) {
+		*d++ = *s++;
+		*d++ = *s++;
+		*d++ = *s++;
+		*d++ = *s++;
+		*d++ = *s++;
+		*d++ = *s++;
+		*d++ = *s++;
+		*d++ = *s++;
+	}
+
+	if (__n & 1 << 2) {
+		*d++ = *s++;
+		*d++ = *s++;
+		*d++ = *s++;
+		*d++ = *s++;
+	}
+
+	if (__n & 1 << 1) {
+		*d++ = *s++;
+		*d++ = *s++;
+	}
+
+	if (__n & 1)
+		*d++ = *s++;
+
+	return __dest;
+}
+
+void *memmove(void *__dest, __const void *__src, size_t count)
+{
+	unsigned char *d = __dest;
+	const unsigned char *s = __src;
+
+	if (__dest == __src)
+		return __dest;
+
+	if (__dest < __src)
+		return memcpy(__dest, __src, count);
+
+	while (count--)
+		d[count] = s[count];
+	return __dest;
+}
+
+size_t strlen(const char *s)
+{
+	const char *sc = s;
+
+	while (*sc != '\0')
+		sc++;
+	return sc - s;
+}
+
+int memcmp(const void *cs, const void *ct, size_t count)
+{
+	const unsigned char *su1 = cs, *su2 = ct, *end = su1 + count;
+	int res = 0;
+
+	while (su1 < end) {
+		res = *su1++ - *su2++;
+		if (res)
+			break;
+	}
+	return res;
+}
+
+int strcmp(const char *cs, const char *ct)
+{
+	unsigned char c1, c2;
+	int res = 0;
+
+	do {
+		c1 = *cs++;
+		c2 = *ct++;
+		res = c1 - c2;
+		if (res)
+			break;
+	} while (c1);
+	return res;
+}
+
+void *memchr(const void *s, int c, size_t count)
+{
+	const unsigned char *p = s;
+
+	while (count--)
+		if ((unsigned char)c == *p++)
+			return (void *)(p - 1);
+	return NULL;
+}
+
+char *strchr(const char *s, int c)
+{
+	while (*s != (char)c)
+		if (*s++ == '\0')
+			return NULL;
+	return (char *)s;
+}
+
+#undef memset
+
+void *memset(void *s, int c, size_t count)
+{
+	char *xs = s;
+	while (count--)
+		*xs++ = c;
+	return s;
+}
+
+void __memzero(void *s, size_t count)
+{
+	memset(s, 0, count);
+}
-- 
1.7.10.4


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Re: [PATCH 03/12] Add pre-bootloader (pbl) image support

[Sascha Hauer]

On Mon, Jul 30, 2012 at 12:02:36PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> +
> +	/* Setup the stack */
> +	r = STACK_BASE + STACK_SIZE - 16;
> +	__asm__ __volatile__("mov sp, %0" : : "r"(r));
> +	/* clear bss */
> +	memset(__bss_start, 0, __bss_stop - __bss_start);
> +
> +	start_barebox();
> +}
> +#else
>  void __naked __section(.text_entry) start(void)
>  {
>  	barebox_arm_head();
>  }
> +#endif
>  
>  /*
>   * The actual reset vector. This code is position independent and usually
> @@ -73,6 +97,14 @@ void __naked __bare_init reset(void)
>  	board_init_lowlevel_return();
>  }
>  
> +#ifdef __PBL__
> +void barebox_pbl(uint32_t offset)
> +{
> +}
> +#else
> +void barebox_pbl(uint32_t offset) {}
> +#endif
> +
>  /*
>   * Board code can jump here by either returning from board_init_lowlevel
>   * or by calling this function directly.
> @@ -105,8 +137,11 @@ void __naked __section(.text_ll_return) board_init_lowlevel_return(void)
>  	/* flush I-cache before jumping to the copied binary */
>  	__asm__ __volatile__("mcr p15, 0, %0, c7, c5, 0" : : "r" (0));
>  
> -	/* call start_barebox with its absolute address */
> -	r = (unsigned int)&start_barebox;
> -	__asm__ __volatile__("mov pc, %0" : : "r"(r));
> +	if (IS_ENABLED(CONFIG_PBL_IMAGE)) {
> +		barebox_pbl(offset);

The pbl should be called at it's absolute address, not at it's relative
address. This makes sure that the pbl code is running in a completely
valid C environment.

I fixed that before applying

Sascha

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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Re: [PATCH 03/12] Add pre-bootloader (pbl) image support

[Sascha Hauer]

On Mon, Jul 30, 2012 at 12:02:36PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> This allows for creating a pre-bootloader binary for
>  - nand boot
>  - mmc boot
>  - compressed image
> 
> The pbl will be incharge of the lowlevel init if needed.
> The barebox will skip it.
> 
> Import string functions from linux 3.4 (arch/arm/boot/compressed/string.c) and
> implement a dummy panic.
> 
> For now on introduce dummy zbarebox* targets and c code that will contain later
> the decompressor. This only implemeted on ARM.
> 
> This patch is based on Sascha Hauer <s.hauer@pengutronix.de>
> Add compressed image support patch
> 
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> ---
>  Makefile                                           |    6 +-
>  arch/arm/Kconfig                                   |    1 +
>  arch/arm/Makefile                                  |    4 +
>  arch/arm/cpu/Makefile                              |    1 +

In this file the following must be added to make 'make clean' work in
the pbl directory:

archclean:
	$(MAKE) $(clean)=$(pbl)

Sascha

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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Re: [PATCH 03/12] Add pre-bootloader (pbl) image support

[Jean-Christophe PLAGNIOL-VILLARD]

On 08:50 Fri 03 Aug     , Sascha Hauer wrote:
> On Mon, Jul 30, 2012 at 12:02:36PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > This allows for creating a pre-bootloader binary for
> >  - nand boot
> >  - mmc boot
> >  - compressed image
> > 
> > The pbl will be incharge of the lowlevel init if needed.
> > The barebox will skip it.
> > 
> > Import string functions from linux 3.4 (arch/arm/boot/compressed/string.c) and
> > implement a dummy panic.
> > 
> > For now on introduce dummy zbarebox* targets and c code that will contain later
> > the decompressor. This only implemeted on ARM.
> > 
> > This patch is based on Sascha Hauer <s.hauer@pengutronix.de>
> > Add compressed image support patch
> > 
> > Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> > ---
> >  Makefile                                           |    6 +-
> >  arch/arm/Kconfig                                   |    1 +
> >  arch/arm/Makefile                                  |    4 +
> >  arch/arm/cpu/Makefile                              |    1 +
> 
> In this file the following must be added to make 'make clean' work in
> the pbl directory:
> 
> archclean:
> 	$(MAKE) $(clean)=$(pbl)

yeap forget this one

Best Regards,
J.

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[PATCH 04/12] pbl: discard unwind symbol if enable in barebox

[Jean-Christophe PLAGNIOL-VILLARD]

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 arch/arm/pbl/zbarebox.lds.S |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/pbl/zbarebox.lds.S b/arch/arm/pbl/zbarebox.lds.S
index 1cbcef4..0902067 100644
--- a/arch/arm/pbl/zbarebox.lds.S
+++ b/arch/arm/pbl/zbarebox.lds.S
@@ -46,6 +46,10 @@ SECTIONS
 		__bare_init_end = .;
 		*(.text*)
 	}
+
+	/* Discard unwind if enable in barebox */
+	/DISCARD/ : { *(.ARM.ex*) }
+
 	BAREBOX_BARE_INIT_SIZE
 
 	. = ALIGN(4);
-- 
1.7.10.4


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[PATCH 05/12] Add compressed image support

[Jean-Christophe PLAGNIOL-VILLARD]

From: Sascha Hauer <s.hauer@pengutronix.de>

This allows for creating a lzo compressed binary unsing the pbl.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
[From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>]
re-integrate it in the new pbl target.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 arch/arm/Kconfig         |    1 +
 arch/arm/Makefile        |    4 ++++
 arch/arm/cpu/start.c     |   59 ++++++++++++++++++++++++++++++++++++++++++++++
 arch/arm/pbl/Makefile    |   16 +++++++++++--
 arch/arm/pbl/piggy.lzo.S |    6 +++++
 5 files changed, 84 insertions(+), 2 deletions(-)
 create mode 100644 arch/arm/pbl/piggy.lzo.S

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3d11497..245bec8 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -5,6 +5,7 @@ config ARM
 	select HAVE_CONFIGURABLE_MEMORY_LAYOUT
 	select HAVE_CONFIGURABLE_TEXT_BASE
 	select HAVE_PBL_IMAGE
+	select HAVE_IMAGE_COMPRESSION
 	default y
 
 config ARM_AMBA
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 80ef986..8e4bb48 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -194,6 +194,10 @@ ifeq ($(CONFIG_ARCH_DAVINCI),y)
 KBUILD_IMAGE := barebox.ubl
 endif
 
+ifdef CONFIG_IMAGE_COMPRESSION
+KBUILD_IMAGE := zbarebox.bin
+endif
+
 pbl := arch/arm/pbl
 zbarebox.S zbarebox.bin zbarebox: barebox.bin
 	$(Q)$(MAKE) $(build)=$(pbl) $(pbl)/$@
diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
index 49b1d5b..a54f5fd 100644
--- a/arch/arm/cpu/start.c
+++ b/arch/arm/cpu/start.c
@@ -98,8 +98,67 @@ void __naked __bare_init reset(void)
 }
 
 #ifdef __PBL__
+extern void *input_data;
+extern void *input_data_end;
+
+#define STATIC static
+
+#ifdef CONFIG_IMAGE_COMPRESSION_LZO
+#include "../../../lib/decompress_unlzo.c"
+#endif
+
+void barebox_uncompress(void *compressed_start, unsigned int len)
+{
+	void (*barebox)(void);
+
+	if (IS_ENABLED(CONFIG_THUMB2_BAREBOX))
+		barebox = (void *)(TEXT_BASE + 1);
+	else
+		barebox = (void *)TEXT_BASE;
+
+	decompress((void *)compressed_start,
+			len,
+			NULL, NULL,
+			(void *)TEXT_BASE, NULL, NULL);
+
+	/* flush I-cache before jumping to the uncompressed binary */
+	__asm__ __volatile__("mcr p15, 0, %0, c7, c5, 0" : : "r" (0));
+
+	barebox();
+}
+
 void barebox_pbl(uint32_t offset)
 {
+	uint32_t compressed_start, compressed_end, len;
+	void (*uncompress)(void *compressed_start, unsigned int len);
+
+	compressed_start = (uint32_t)&input_data - offset;
+	compressed_end = (uint32_t)&input_data_end - offset;
+	len = compressed_end - compressed_start;
+
+	/*
+	 * Check if the compressed binary will be overwritten
+	 * by the uncompressed binary
+	 */
+	if (compressed_start >= TEXT_BASE &&
+			compressed_start < TEXT_BASE + len * 4 ) {
+		/*
+		 * copy compressed binary to its link address
+		 */
+		memcpy(&input_data, (void *)compressed_start, len);
+		compressed_start = (uint32_t)&input_data;
+	}
+
+	uncompress = barebox_uncompress;
+
+	/* call barebox_uncompress with its absolute address */
+	__asm__ __volatile__(
+		"mov r0, %1\n"
+		"mov r1, %2\n"
+		"mov pc, %0\n"
+		:
+		: "r"(uncompress), "r"(compressed_start), "r"(len)
+		: "r0", "r1");
 }
 #else
 void barebox_pbl(uint32_t offset) {}
diff --git a/arch/arm/pbl/Makefile b/arch/arm/pbl/Makefile
index 9b364bb..4135911 100644
--- a/arch/arm/pbl/Makefile
+++ b/arch/arm/pbl/Makefile
@@ -1,7 +1,14 @@
 
+suffix_$(CONFIG_IMAGE_COMPRESSION_LZO)	= lzo
+
 OBJCOPYFLAGS_zbarebox.bin = -O binary
+piggy_o := piggy.$(suffix_y).o
+
+targets := zbarebox.lds zbarebox zbarebox.bin zbarebox.S \
+	   $(piggy_o) piggy.$(suffix_y)
 
-targets := zbarebox.lds zbarebox zbarebox.bin zbarebox.S
+# Make sure files are removed during clean
+extra-y       += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern
 
 $(obj)/zbarebox.bin:	$(obj)/zbarebox FORCE
 	$(call if_changed,objcopy)
@@ -12,7 +19,7 @@ $(obj)/zbarebox.S: $(obj)/zbarebox FORCE
 	$(call if_changed,disasm)
 
 LDFLAGS_zbarebox	:= -Map zbarebox.map
-zbarebox-common := $(barebox-pbl-common)
+zbarebox-common := $(barebox-pbl-common) $(obj)/$(piggy_o)
 zbarebox-lds := $(obj)/zbarebox.lds
 
 quiet_cmd_zbarebox__ ?= LD      $@
@@ -23,3 +30,8 @@ quiet_cmd_zbarebox__ ?= LD      $@
 
 $(obj)/zbarebox: $(zbarebox-lds) $(zbarebox-common) FORCE
 	$(call if_changed,zbarebox__)
+
+$(obj)/piggy.$(suffix_y): $(obj)/../../../barebox.bin FORCE
+	$(call if_changed,$(suffix_y))
+
+$(obj)/$(piggy_o): $(obj)/piggy.$(suffix_y) FORCE
diff --git a/arch/arm/pbl/piggy.lzo.S b/arch/arm/pbl/piggy.lzo.S
new file mode 100644
index 0000000..e0484c7
--- /dev/null
+++ b/arch/arm/pbl/piggy.lzo.S
@@ -0,0 +1,6 @@
+	.section .piggydata,#alloc
+	.globl	input_data
+input_data:
+	.incbin	"arch/arm/pbl/piggy.lzo"
+	.globl	input_data_end
+input_data_end:
-- 
1.7.10.4


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Re: [PATCH 05/12] Add compressed image support

[Sascha Hauer]

On Mon, Jul 30, 2012 at 12:02:38PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> From: Sascha Hauer <s.hauer@pengutronix.de>
> +
>  void barebox_pbl(uint32_t offset)
>  {
> +	uint32_t compressed_start, compressed_end, len;
> +	void (*uncompress)(void *compressed_start, unsigned int len);
> +
> +	compressed_start = (uint32_t)&input_data - offset;
> +	compressed_end = (uint32_t)&input_data_end - offset;
> +	len = compressed_end - compressed_start;
> +
> +	/*
> +	 * Check if the compressed binary will be overwritten
> +	 * by the uncompressed binary
> +	 */
> +	if (compressed_start >= TEXT_BASE &&
> +			compressed_start < TEXT_BASE + len * 4 ) {
> +		/*
> +		 * copy compressed binary to its link address
> +		 */
> +		memcpy(&input_data, (void *)compressed_start, len);
> +		compressed_start = (uint32_t)&input_data;
> +	}
> +
> +	uncompress = barebox_uncompress;
> +
> +	/* call barebox_uncompress with its absolute address */
> +	__asm__ __volatile__(
> +		"mov r0, %1\n"
> +		"mov r1, %2\n"
> +		"mov pc, %0\n"
> +		:
> +		: "r"(uncompress), "r"(compressed_start), "r"(len)
> +		: "r0", "r1");

When the pbl code runs at its correct address, then we can simply do a
barebox_uncompress() here.

Fixed this before applying.

Sascha


-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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Re: [PATCH 05/12] Add compressed image support

[Jean-Christophe PLAGNIOL-VILLARD]

On 17:30 Thu 02 Aug     , Sascha Hauer wrote:
> On Mon, Jul 30, 2012 at 12:02:38PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > From: Sascha Hauer <s.hauer@pengutronix.de>
> > +
> >  void barebox_pbl(uint32_t offset)
> >  {
> > +	uint32_t compressed_start, compressed_end, len;
> > +	void (*uncompress)(void *compressed_start, unsigned int len);
> > +
> > +	compressed_start = (uint32_t)&input_data - offset;
> > +	compressed_end = (uint32_t)&input_data_end - offset;
> > +	len = compressed_end - compressed_start;
> > +
> > +	/*
> > +	 * Check if the compressed binary will be overwritten
> > +	 * by the uncompressed binary
> > +	 */
> > +	if (compressed_start >= TEXT_BASE &&
> > +			compressed_start < TEXT_BASE + len * 4 ) {
> > +		/*
> > +		 * copy compressed binary to its link address
> > +		 */
> > +		memcpy(&input_data, (void *)compressed_start, len);
> > +		compressed_start = (uint32_t)&input_data;
> > +	}
> > +
> > +	uncompress = barebox_uncompress;
> > +
> > +	/* call barebox_uncompress with its absolute address */
> > +	__asm__ __volatile__(
> > +		"mov r0, %1\n"
> > +		"mov r1, %2\n"
> > +		"mov pc, %0\n"
> > +		:
> > +		: "r"(uncompress), "r"(compressed_start), "r"(len)
> > +		: "r0", "r1");
> 
> When the pbl code runs at its correct address, then we can simply do a
> barebox_uncompress() here.
> 
> Fixed this before applying.
the code in start does not do this

we just do a call to barebox_pbl

are you really sure about this?

Best Regards,
J.

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Re: [PATCH 05/12] Add compressed image support

[Sascha Hauer]

On Thu, Aug 02, 2012 at 05:34:22PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 17:30 Thu 02 Aug     , Sascha Hauer wrote:
> > On Mon, Jul 30, 2012 at 12:02:38PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > > From: Sascha Hauer <s.hauer@pengutronix.de>
> > > +
> > >  void barebox_pbl(uint32_t offset)
> > >  {
> > > +	uint32_t compressed_start, compressed_end, len;
> > > +	void (*uncompress)(void *compressed_start, unsigned int len);
> > > +
> > > +	compressed_start = (uint32_t)&input_data - offset;
> > > +	compressed_end = (uint32_t)&input_data_end - offset;
> > > +	len = compressed_end - compressed_start;
> > > +
> > > +	/*
> > > +	 * Check if the compressed binary will be overwritten
> > > +	 * by the uncompressed binary
> > > +	 */
> > > +	if (compressed_start >= TEXT_BASE &&
> > > +			compressed_start < TEXT_BASE + len * 4 ) {
> > > +		/*
> > > +		 * copy compressed binary to its link address
> > > +		 */
> > > +		memcpy(&input_data, (void *)compressed_start, len);
> > > +		compressed_start = (uint32_t)&input_data;
> > > +	}
> > > +
> > > +	uncompress = barebox_uncompress;
> > > +
> > > +	/* call barebox_uncompress with its absolute address */
> > > +	__asm__ __volatile__(
> > > +		"mov r0, %1\n"
> > > +		"mov r1, %2\n"
> > > +		"mov pc, %0\n"
> > > +		:
> > > +		: "r"(uncompress), "r"(compressed_start), "r"(len)
> > > +		: "r0", "r1");
> > 
> > When the pbl code runs at its correct address, then we can simply do a
> > barebox_uncompress() here.
> > 
> > Fixed this before applying.
> the code in start does not do this
> 
> we just do a call to barebox_pbl

See my other mails to the other patches.

Sascha

-- 
Pengutronix e.K.                           |                             |
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[PATCH 06/12] only compress default env in uncompressed images

[Jean-Christophe PLAGNIOL-VILLARD]

From: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 common/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff --git a/common/Kconfig b/common/Kconfig
index 7b5a307..40f0c71 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -511,6 +511,7 @@ config DEFAULT_ENVIRONMENT
 config DEFAULT_ENVIRONMENT_COMPRESSED
 	bool
 	depends on DEFAULT_ENVIRONMENT
+	depends on !IMAGE_COMPRESSION_LZO
 	default y if ZLIB
 	default y if BZLIB
 	default y if LZO_DECOMPRESS
-- 
1.7.10.4


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[PATCH 07/12] decompressor: import malloc/free implementation for linux 3.4

[Jean-Christophe PLAGNIOL-VILLARD]

This is need for gunzip support

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 include/linux/decompress/mm.h |   68 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 include/linux/decompress/mm.h

diff --git a/include/linux/decompress/mm.h b/include/linux/decompress/mm.h
new file mode 100644
index 0000000..0c35411
--- /dev/null
+++ b/include/linux/decompress/mm.h
@@ -0,0 +1,68 @@
+/*
+ * linux/compr_mm.h
+ *
+ * Memory management for pre-boot and ramdisk uncompressors
+ *
+ * Authors: Alain Knaff <alain@knaff.lu>
+ *
+ */
+
+#ifndef DECOMPR_MM_H
+#define DECOMPR_MM_H
+
+#ifdef STATIC
+
+/* Code active when included from pre-boot environment: */
+
+/*
+ * Some architectures want to ensure there is no local data in their
+ * pre-boot environment, so that data can arbitrarily relocated (via
+ * GOT references).  This is achieved by defining STATIC_RW_DATA to
+ * be null.
+ */
+#ifndef STATIC_RW_DATA
+#define STATIC_RW_DATA static
+#endif
+
+/* A trivial malloc implementation, adapted from
+ *  malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
+ */
+STATIC_RW_DATA unsigned long malloc_ptr;
+STATIC_RW_DATA int malloc_count;
+
+static void *malloc(int size)
+{
+	void *p;
+
+	if (size < 0)
+		return NULL;
+	if (!malloc_ptr)
+		malloc_ptr = free_mem_ptr;
+
+	malloc_ptr = (malloc_ptr + 3) & ~3;     /* Align */
+
+	p = (void *)malloc_ptr;
+	malloc_ptr += size;
+
+	if (free_mem_end_ptr && malloc_ptr >= free_mem_end_ptr)
+		return NULL;
+
+	malloc_count++;
+	return p;
+}
+
+static void free(void *where)
+{
+	malloc_count--;
+	if (!malloc_count)
+		malloc_ptr = free_mem_ptr;
+}
+
+#define large_malloc(a) malloc(a)
+#define large_free(a) free(a)
+
+#define INIT
+
+#endif /* STATIC */
+
+#endif /* DECOMPR_MM_H */
-- 
1.7.10.4


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[PATCH 08/12] ARM: add early malloc support needed by the decompressor

[Jean-Christophe PLAGNIOL-VILLARD]

This is not needed by lzo but by gunzip, xz and others.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 arch/arm/cpu/start.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
index a54f5fd..f61c326 100644
--- a/arch/arm/cpu/start.c
+++ b/arch/arm/cpu/start.c
@@ -28,6 +28,9 @@
 #include <asm-generic/memory_layout.h>
 #include <asm/sections.h>
 
+unsigned long free_mem_ptr;
+unsigned long free_mem_end_ptr;
+
 #ifdef CONFIG_PBL_IMAGE
 void __naked __section(.text_head_entry) pbl_start(void)
 {
@@ -193,6 +196,10 @@ void __naked __section(.text_ll_return) board_init_lowlevel_return(void)
 	/* clear bss */
 	memset(__bss_start, 0, __bss_stop - __bss_start);
 
+	/* set 128 KiB at the end of the MALLOC_BASE for early malloc */
+	free_mem_ptr = MALLOC_BASE + MALLOC_SIZE - SZ_128K;
+	free_mem_end_ptr = free_mem_ptr + SZ_128K;
+
 	/* flush I-cache before jumping to the copied binary */
 	__asm__ __volatile__("mcr p15, 0, %0, c7, c5, 0" : : "r" (0));
 
-- 
1.7.10.4


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Re: [PATCH 08/12] ARM: add early malloc support needed by the decompressor

[Sascha Hauer]

On Mon, Jul 30, 2012 at 12:02:41PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> This is not needed by lzo but by gunzip, xz and others.
> 
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> ---
>  arch/arm/cpu/start.c |    7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
> index a54f5fd..f61c326 100644
> --- a/arch/arm/cpu/start.c
> +++ b/arch/arm/cpu/start.c
> @@ -28,6 +28,9 @@
>  #include <asm-generic/memory_layout.h>
>  #include <asm/sections.h>
>  
> +unsigned long free_mem_ptr;
> +unsigned long free_mem_end_ptr;
> +
>  #ifdef CONFIG_PBL_IMAGE
>  void __naked __section(.text_head_entry) pbl_start(void)
>  {
> @@ -193,6 +196,10 @@ void __naked __section(.text_ll_return) board_init_lowlevel_return(void)
>  	/* clear bss */
>  	memset(__bss_start, 0, __bss_stop - __bss_start);
>  
> +	/* set 128 KiB at the end of the MALLOC_BASE for early malloc */
> +	free_mem_ptr = MALLOC_BASE + MALLOC_SIZE - SZ_128K;
> +	free_mem_end_ptr = free_mem_ptr + SZ_128K;

This is not needed here, so it should be better done in barebox_pbl()
when we actually need it. Also, global variables should not be used when
we do not run from the address we are linked at.

I fixed this before applying.

Sascha


-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
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[PATCH 09/12] compressed image: add gzip support

[Jean-Christophe PLAGNIOL-VILLARD]

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 arch/arm/cpu/start.c      |    4 ++++
 arch/arm/pbl/Makefile     |    1 +
 arch/arm/pbl/piggy.gzip.S |    6 ++++++
 common/Kconfig            |    3 +++
 lib/decompress_inflate.c  |    1 +
 5 files changed, 15 insertions(+)
 create mode 100644 arch/arm/pbl/piggy.gzip.S

diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
index f61c326..f570f32 100644
--- a/arch/arm/cpu/start.c
+++ b/arch/arm/cpu/start.c
@@ -110,6 +110,10 @@ extern void *input_data_end;
 #include "../../../lib/decompress_unlzo.c"
 #endif
 
+#ifdef CONFIG_IMAGE_COMPRESSION_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
 void barebox_uncompress(void *compressed_start, unsigned int len)
 {
 	void (*barebox)(void);
diff --git a/arch/arm/pbl/Makefile b/arch/arm/pbl/Makefile
index 4135911..04fdffb 100644
--- a/arch/arm/pbl/Makefile
+++ b/arch/arm/pbl/Makefile
@@ -1,4 +1,5 @@
 
+suffix_$(CONFIG_IMAGE_COMPRESSION_GZIP) = gzip
 suffix_$(CONFIG_IMAGE_COMPRESSION_LZO)	= lzo
 
 OBJCOPYFLAGS_zbarebox.bin = -O binary
diff --git a/arch/arm/pbl/piggy.gzip.S b/arch/arm/pbl/piggy.gzip.S
new file mode 100644
index 0000000..4a623c0
--- /dev/null
+++ b/arch/arm/pbl/piggy.gzip.S
@@ -0,0 +1,6 @@
+	.section .piggydata,#alloc
+	.globl  input_data
+input_data:
+	.incbin "arch/arm/pbl/piggy.gzip"
+	.globl  input_data_end
+input_data_end:
diff --git a/common/Kconfig b/common/Kconfig
index 40f0c71..6fee9ae 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -125,6 +125,9 @@ choice
 config IMAGE_COMPRESSION_LZO
 	bool "lzo"
 
+config IMAGE_COMPRESSION_GZIP
+	bool "gzip"
+
 endchoice
 
 endif
diff --git a/lib/decompress_inflate.c b/lib/decompress_inflate.c
index 526d6a1..5c1ebb6 100644
--- a/lib/decompress_inflate.c
+++ b/lib/decompress_inflate.c
@@ -4,6 +4,7 @@
 /* prevent inclusion of _LINUX_KERNEL_H in pre-boot environment: lots
  * errors about console_printk etc... on ARM */
 #define _LINUX_KERNEL_H
+#include <linux/decompress/mm.h>
 
 #include "zlib_inflate/inftrees.c"
 #include "zlib_inflate/inffast.c"
-- 
1.7.10.4


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[PATCH 10/12] at91: add lowlevel init to the pbl

[Jean-Christophe PLAGNIOL-VILLARD]

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 arch/arm/mach-at91/Makefile |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index 491c454..3ade725 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -4,6 +4,8 @@ lowlevel_init-y = at91sam926x_lowlevel_init.o
 lowlevel_init-$(CONFIG_ARCH_AT91RM9200) = at91rm9200_lowlevel_init.o
 obj-$(CONFIG_MACH_DO_LOWLEVEL_INIT) += $(lowlevel_init-y)
 
+pbl-$(CONFIG_MACH_DO_LOWLEVEL_INIT) += $(lowlevel_init-y)
+
 obj-$(CONFIG_AT91SAM9_RESET) += at91sam9_reset.o
 obj-$(CONFIG_AT91SAM9G45_RESET) += at91sam9g45_reset.o
 
-- 
1.7.10.4


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[PATCH 11/12] kbuild: allow to have custom cppflags for pbl

[Jean-Christophe PLAGNIOL-VILLARD]

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 scripts/Makefile.build |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index e5b7779..383d73f 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -188,7 +188,7 @@ quiet_cmd_pbl_cc_o_c = PBLCC   $@
 
 ifndef CONFIG_MODVERSIONS
 cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
-cmd_pbl_cc_o_c = $(CC) -D__PBL__ $(c_flags) -c -o $@ $<
+cmd_pbl_cc_o_c = $(CC) -D__PBL__ $(c_flags) $(PBL_CPPFLAGS) -c -o $@ $<
 
 else
 # When module versioning is enabled the following steps are executed:
@@ -282,7 +282,7 @@ quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 
 quiet_cmd_pbl_as_o_S = PBLAS   $@
-cmd_pbl_as_o_S       = $(CC) -D__PBL__ $(a_flags) -c -o $@ $<
+cmd_pbl_as_o_S       = $(CC) -D__PBL__ $(a_flags) $(PBL_CPPFLAGS) -c -o $@ $<
 
 pbl-%.o: %.S
 	$(call if_changed_dep,pbl_as_o_S)
-- 
1.7.10.4


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[PATCH 12/12] arm: always enable the garbage collector for pbl

[Jean-Christophe PLAGNIOL-VILLARD]

This allow to save arround 1KiB on at91

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 arch/arm/pbl/Makefile |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/pbl/Makefile b/arch/arm/pbl/Makefile
index 04fdffb..143da8b 100644
--- a/arch/arm/pbl/Makefile
+++ b/arch/arm/pbl/Makefile
@@ -19,7 +19,9 @@ $(obj)/zbarebox.bin:	$(obj)/zbarebox FORCE
 $(obj)/zbarebox.S: $(obj)/zbarebox FORCE
 	$(call if_changed,disasm)
 
+PBL_CPPFLAGS		+= -fdata-sections -ffunction-sections
 LDFLAGS_zbarebox	:= -Map zbarebox.map
+LDFLAGS_zbarebox	+= -static --gc-sections
 zbarebox-common := $(barebox-pbl-common) $(obj)/$(piggy_o)
 zbarebox-lds := $(obj)/zbarebox.lds
 
-- 
1.7.10.4


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Re: [PATCH 00/12 v3] Add Pre-Bootloader support

[Juergen Beisert]

Jean-Christophe PLAGNIOL-VILLARD wrote:
> [...]
> Currently on the compressed image is implemented the boot really on current
> lowlevel init support.

^ Does this sentence makes any sense?

This patch set seems an important addition, so I think it needs a little bit 
more of documentation. But wait...I know...nobody reads documentation...

jbe

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Re: [PATCH 00/12 v3] Add Pre-Bootloader support

[Thomas Petazzoni]

Le Mon, 30 Jul 2012 12:38:43 +0200,
Juergen Beisert <jbe@pengutronix.de> a écrit :

> Jean-Christophe PLAGNIOL-VILLARD wrote:
> > [...]
> > Currently on the compressed image is implemented the boot really on current
> > lowlevel init support.
> 
> ^ Does this sentence makes any sense?
> 
> This patch set seems an important addition, so I think it needs a little bit 
> more of documentation. But wait...I know...nobody reads documentation...

I agree. I also very interested by this feature and it sounds a great
feature, but the patch set lacks a little of explanations on what it
does and how it works.

Best regards,

Thomas
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Re: [PATCH 00/12 v3] Add Pre-Bootloader support

[Jean-Christophe PLAGNIOL-VILLARD]

On 16:44 Mon 30 Jul     , Thomas Petazzoni wrote:
> Le Mon, 30 Jul 2012 12:38:43 +0200,
> Juergen Beisert <jbe@pengutronix.de> a écrit :
> 
> > Jean-Christophe PLAGNIOL-VILLARD wrote:
> > > [...]
> > > Currently on the compressed image is implemented the boot really on current
> > > lowlevel init support.
> > 
> > ^ Does this sentence makes any sense?
> > 
> > This patch set seems an important addition, so I think it needs a little bit 
> > more of documentation. But wait...I know...nobody reads documentation...
> 
> I agree. I also very interested by this feature and it sounds a great
> feature, but the patch set lacks a little of explanations on what it
> does and how it works.
simple does like the ARM linux kernel

I've not time to do the DoC those days

If someone have time please do so

Best Regards,
J.

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Re: [PATCH 00/12 v3] Add Pre-Bootloader support

[Juergen Beisert]

Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 16:44 Mon 30 Jul     , Thomas Petazzoni wrote:
> > Le Mon, 30 Jul 2012 12:38:43 +0200,
> >
> > Juergen Beisert <jbe@pengutronix.de> a écrit :
> > > Jean-Christophe PLAGNIOL-VILLARD wrote:
> > > > [...]
> > > > Currently on the compressed image is implemented the boot really on
> > > > current lowlevel init support.
> > >
> > > ^ Does this sentence makes any sense?
> > >
> > > This patch set seems an important addition, so I think it needs a
> > > little bit more of documentation. But wait...I know...nobody reads
> > > documentation...
> >
> > I agree. I also very interested by this feature and it sounds a great
> > feature, but the patch set lacks a little of explanations on what it
> > does and how it works.
>
> simple does like the ARM linux kernel
>
> I've not time to do the DoC those days

e: lame excuse
d: faule Ausrede
f: mauvaise excuse

;)

jbe

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