[PATCH 00/12 v4] Add Pre-Bootloader support

[PATCH 00/12 v4] Add Pre-Bootloader support

[Jean-Christophe PLAGNIOL-VILLARD]

Hi,
v4:
	integrate Sascha comments
	split pbl and barebox start on arm (more easy to review and maintain)
	optimezed copy of the piggydata only if needed
	fix make clean

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 6efca01b82a59f32b016f9cfd46b12e8e632ee92:

  eukrea_cpuimx35: fix USB host (2012-08-02 11:01:18 +0200)

are available in the git repository at:

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

for you to fetch changes up to 1d861eb2a6384495261122f183842fcd8a8e059e:

  arm: always enable the garbage collector for pbl (2012-08-03 18:09:16 +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: add pre-bootloader (pbl) target
      Add pre-bootloader (pbl) image support
      pbl: discard unwind symbol if enable in barebox
      Add compressed image support
      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):
      Makefile.clean: include Makefiles again
      ARM pbl: Add .gitignore for generated files

 Makefile                            |   11 ++++-
 arch/arm/Kconfig                    |    2 +
 arch/arm/Makefile                   |   11 +++++
 arch/arm/cpu/Makefile               |    3 +-
 arch/arm/cpu/start-pbl.c            |  143 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 arch/arm/cpu/start-reset.c          |   67 ++++++++++++++++++++++++++
 arch/arm/cpu/start.c                |   54 +++++++--------------
 arch/arm/lib/Makefile               |    4 ++
 arch/arm/lib/barebox.lds.S          |    3 +-
 arch/arm/mach-at91/Makefile         |    2 +
 arch/arm/pbl/.gitignore             |    5 ++
 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         |   78 +++++++++++++++++++++++++++++++
 common/Kconfig                      |   44 +++++++++++++++++
 include/asm-generic/memory_layout.h |    1 +
 include/asm-generic/sections.h      |    2 +
 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              |   48 +++++++++++++++++--
 scripts/Makefile.clean              |    2 +-
 scripts/Makefile.lib                |   14 ++++++
 26 files changed, 715 insertions(+), 46 deletions(-)
 create mode 100644 arch/arm/cpu/start-pbl.c
 create mode 100644 arch/arm/cpu/start-reset.c
 create mode 100644 arch/arm/pbl/.gitignore
 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

Best Regards,
J.

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[PATCH 01/12] Makefile.clean: include Makefiles again

[Jean-Christophe PLAGNIOL-VILLARD]

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

This makes it possible to add architecure specific clean
targets again.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 scripts/Makefile.clean |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index 702f491..cff3349 100644
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -14,7 +14,7 @@ clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
 
 # The filename Kbuild has precedence over Makefile
 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
-#include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
+include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
 
 # Figure out what we need to build from the various variables
 # ==========================================================================
-- 
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 969afbb..ca47cb1 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                                  |    7 ++
 arch/arm/cpu/Makefile                              |    3 +-
 arch/arm/cpu/{start.c => start-pbl.c}              |   58 ++-------
 arch/arm/cpu/{start.c => start-reset.c}            |   49 +-------
 arch/arm/cpu/start.c                               |   54 +++------
 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} |   56 +++------
 common/Kconfig                                     |   30 +++++
 include/asm-generic/memory_layout.h                |    1 +
 pbl/Makefile                                       |    5 +
 pbl/misc.c                                         |   14 +++
 pbl/string.c                                       |  127 ++++++++++++++++++++
 16 files changed, 268 insertions(+), 175 deletions(-)
 copy arch/arm/cpu/{start.c => start-pbl.c} (64%)
 copy arch/arm/cpu/{start.c => start-reset.c} (58%)
 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 ca47cb1..ce1506c 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 08c742b..7932afc 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 1b60261..0ea050e 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -197,6 +197,13 @@ 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) $(pbl)/$@
+
+archclean:
+	$(MAKE) $(clean)=$(pbl)
+
 all: $(KBUILD_IMAGE)
 
 archprepare: maketools
diff --git a/arch/arm/cpu/Makefile b/arch/arm/cpu/Makefile
index 93a34a9..78d300d 100644
--- a/arch/arm/cpu/Makefile
+++ b/arch/arm/cpu/Makefile
@@ -1,7 +1,7 @@
 obj-y += cpu.o
 obj-$(CONFIG_ARM_EXCEPTIONS) += exceptions.o
 obj-$(CONFIG_ARM_EXCEPTIONS) += interrupts.o
-obj-y += start.o
+obj-y += start.o start-reset.o
 
 #
 # Any variants can be called as start-armxyz.S
@@ -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-pbl.o start-reset.o
diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start-pbl.c
similarity index 64%
copy from arch/arm/cpu/start.c
copy to arch/arm/cpu/start-pbl.c
index 112403e..28d6f34 100644
--- a/arch/arm/cpu/start.c
+++ b/arch/arm/cpu/start-pbl.c
@@ -1,7 +1,8 @@
 /*
- * start-arm.c
+ * start-pbl.c
  *
- * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ * Copyright (c) 2010-2012 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ * Copyright (c) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -24,53 +25,16 @@
 #include <init.h>
 #include <asm/barebox-arm.h>
 #include <asm/barebox-arm-head.h>
-#include <asm/system.h>
 #include <asm-generic/memory_layout.h>
 #include <asm/sections.h>
 
-void __naked __section(.text_entry) start(void)
+void __naked __section(.text_head_entry) pbl_start(void)
 {
 	barebox_arm_head();
 }
 
-/*
- * The actual reset vector. This code is position independent and usually
- * does not run at the address it's linked at.
- */
-void __naked __bare_init reset(void)
+void barebox_pbl(uint32_t offset)
 {
-	uint32_t r;
-
-	/* set the cpu to SVC32 mode */
-	__asm__ __volatile__("mrs %0, cpsr":"=r"(r));
-	r &= ~0x1f;
-	r |= 0xd3;
-	__asm__ __volatile__("msr cpsr, %0" : : "r"(r));
-
-#ifdef CONFIG_ARCH_HAS_LOWLEVEL_INIT
-	arch_init_lowlevel();
-#endif
-
-	/* disable MMU stuff and caches */
-	r = get_cr();
-	r &= ~(CR_M | CR_C | CR_B | CR_S | CR_R | CR_V);
-	r |= CR_I;
-
-#if __LINUX_ARM_ARCH__ >= 6
-	r |= CR_U;
-#else
-	r |= CR_A;
-#endif
-
-#ifdef __ARMEB__
-	r |= CR_B;
-#endif
-	set_cr(r);
-
-#ifdef CONFIG_MACH_DO_LOWLEVEL_INIT
-	board_init_lowlevel();
-#endif
-	board_init_lowlevel_return();
 }
 
 /*
@@ -105,8 +69,12 @@ 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));
+	r = (unsigned int)&barebox_pbl;
+	/* call barebox_uncompress with its absolute address */
+	__asm__ __volatile__(
+		"mov r0, %1\n"
+		"mov pc, %0\n"
+		:
+		: "r"(r), "r"(offset),
+		: "r0");
 }
-
diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start-reset.c
similarity index 58%
copy from arch/arm/cpu/start.c
copy to arch/arm/cpu/start-reset.c
index 112403e..e0df676 100644
--- a/arch/arm/cpu/start.c
+++ b/arch/arm/cpu/start-reset.c
@@ -1,5 +1,5 @@
 /*
- * start-arm.c
+ * start-reset.c
  *
  * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
  *
@@ -22,17 +22,10 @@
 
 #include <common.h>
 #include <init.h>
-#include <asm/barebox-arm.h>
-#include <asm/barebox-arm-head.h>
 #include <asm/system.h>
-#include <asm-generic/memory_layout.h>
+#include <asm/barebox-arm.h>
 #include <asm/sections.h>
 
-void __naked __section(.text_entry) start(void)
-{
-	barebox_arm_head();
-}
-
 /*
  * The actual reset vector. This code is position independent and usually
  * does not run at the address it's linked at.
@@ -72,41 +65,3 @@ void __naked __bare_init reset(void)
 #endif
 	board_init_lowlevel_return();
 }
-
-/*
- * Board code can jump here by either returning from board_init_lowlevel
- * or by calling this function directly.
- */
-void __naked __section(.text_ll_return) board_init_lowlevel_return(void)
-{
-	uint32_t r, addr, offset;
-
-	/*
-	 * Get runtime address of this function. Do not
-	 * put any code above this.
-	 */
-	__asm__ __volatile__("1: adr %0, 1b":"=r"(addr));
-
-	/* Setup the stack */
-	r = STACK_BASE + STACK_SIZE - 16;
-	__asm__ __volatile__("mov sp, %0" : : "r"(r));
-
-	/* Get offset between linked address and runtime address */
-	offset = (uint32_t)__ll_return - addr;
-
-	/* relocate to link address if necessary */
-	if (offset)
-		memcpy((void *)_text, (void *)(_text - offset),
-				__bss_start - _text);
-
-	/* clear bss */
-	memset(__bss_start, 0, __bss_stop - __bss_start);
-
-	/* 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));
-}
-
diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
index 112403e..8365a75 100644
--- a/arch/arm/cpu/start.c
+++ b/arch/arm/cpu/start.c
@@ -24,53 +24,31 @@
 #include <init.h>
 #include <asm/barebox-arm.h>
 #include <asm/barebox-arm-head.h>
-#include <asm/system.h>
 #include <asm-generic/memory_layout.h>
 #include <asm/sections.h>
 
-void __naked __section(.text_entry) start(void)
-{
-	barebox_arm_head();
-}
-
+#ifdef CONFIG_PBL_IMAGE
 /*
- * The actual reset vector. This code is position independent and usually
- * does not run at the address it's linked at.
+ * First function in the pbl image. We get here from
+ * the pbl.
  */
-void __naked __bare_init reset(void)
+void __naked __section(.text_entry) start(void)
 {
-	uint32_t r;
+	u32 r;
 
-	/* set the cpu to SVC32 mode */
-	__asm__ __volatile__("mrs %0, cpsr":"=r"(r));
-	r &= ~0x1f;
-	r |= 0xd3;
-	__asm__ __volatile__("msr cpsr, %0" : : "r"(r));
-
-#ifdef CONFIG_ARCH_HAS_LOWLEVEL_INIT
-	arch_init_lowlevel();
-#endif
-
-	/* disable MMU stuff and caches */
-	r = get_cr();
-	r &= ~(CR_M | CR_C | CR_B | CR_S | CR_R | CR_V);
-	r |= CR_I;
+	/* 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);
 
-#if __LINUX_ARM_ARCH__ >= 6
-	r |= CR_U;
+	start_barebox();
+}
 #else
-	r |= CR_A;
-#endif
-
-#ifdef __ARMEB__
-	r |= CR_B;
-#endif
-	set_cr(r);
 
-#ifdef CONFIG_MACH_DO_LOWLEVEL_INIT
-	board_init_lowlevel();
-#endif
-	board_init_lowlevel_return();
+void __naked __section(.text_entry) start(void)
+{
+	barebox_arm_head();
 }
 
 /*
@@ -109,4 +87,4 @@ void __naked __section(.text_ll_return) board_init_lowlevel_return(void)
 	r = (unsigned int)&start_barebox;
 	__asm__ __volatile__("mov pc, %0" : : "r"(r));
 }
-
+#endif
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..b6e8028 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 +51,23 @@ 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 = .;
-
-	__usymtab_start = .;
-	__usymtab : { BAREBOX_SYMS }
-	__usymtab_end = .;
-
 	. = ALIGN(4);
 	__bss_start = .;
 	.bss : { *(.bss*) }
 	__bss_stop = .;
 	_end = .;
-	_barebox_image_size = __bss_start - TEXT_BASE;
+
+	. = ALIGN(4);
+	__piggydata_start = .;
+	.piggydata : {
+		*(.piggydata)
+	}
+	__piggydata_end = .;
+
+	_barebox_image_size = __piggydata_end - 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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barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

[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/Kconfig            |    1 +
 arch/arm/Makefile           |    4 ++++
 arch/arm/pbl/Makefile       |   16 ++++++++++++++--
 arch/arm/pbl/piggy.lzo.S    |    6 ++++++
 arch/arm/pbl/zbarebox.lds.S |    4 ++++
 5 files changed, 29 insertions(+), 2 deletions(-)
 create mode 100644 arch/arm/pbl/piggy.lzo.S

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7932afc..9cba655 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 0ea050e..be4ef30 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -197,6 +197,10 @@ 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/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:
diff --git a/arch/arm/pbl/zbarebox.lds.S b/arch/arm/pbl/zbarebox.lds.S
index b6e8028..d587090 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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barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

[PATCH 05/12] Add compressed image support

[Jean-Christophe PLAGNIOL-VILLARD]

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

Only copy the piggydata if needed.

Add CONFIG_PBL_FORCE_PIGGYDATA_COPY option
In some case we need to copy the PIGGYDATA as the link address
as example we run from SRAM and shutdown the SDRAM/DDR for
reconfiguration but most of the time we just need to copy the
executable code.

based on Sascha Hauer
Add compressed image support

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 arch/arm/cpu/start-pbl.c       |   59 +++++++++++++++++++++++++++++++++++++---
 arch/arm/pbl/zbarebox.lds.S    |    1 +
 common/Kconfig                 |   12 +++++++-
 include/asm-generic/sections.h |    2 ++
 4 files changed, 69 insertions(+), 5 deletions(-)

diff --git a/arch/arm/cpu/start-pbl.c b/arch/arm/cpu/start-pbl.c
index 28d6f34..17e0829 100644
--- a/arch/arm/cpu/start-pbl.c
+++ b/arch/arm/cpu/start-pbl.c
@@ -33,8 +33,33 @@ void __naked __section(.text_head_entry) pbl_start(void)
 	barebox_arm_head();
 }
 
-void barebox_pbl(uint32_t offset)
+extern void *input_data;
+extern void *input_data_end;
+
+#define STATIC static
+
+#ifdef CONFIG_IMAGE_COMPRESSION_LZO
+#include "../../../lib/decompress_unlzo.c"
+#endif
+
+static 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();
 }
 
 /*
@@ -44,6 +69,7 @@ void barebox_pbl(uint32_t offset)
 void __naked __section(.text_ll_return) board_init_lowlevel_return(void)
 {
 	uint32_t r, addr, offset;
+	uint32_t pg_start, pg_end, pg_len;
 
 	/*
 	 * Get runtime address of this function. Do not
@@ -58,6 +84,30 @@ void __naked __section(.text_ll_return) board_init_lowlevel_return(void)
 	/* Get offset between linked address and runtime address */
 	offset = (uint32_t)__ll_return - addr;
 
+	pg_start = (uint32_t)&input_data - offset;
+	pg_end = (uint32_t)&input_data_end - offset;
+	pg_len = pg_end - pg_start;
+
+	if (IS_ENABLED(CONFIG_PBL_FORCE_PIGGYDATA_COPY))
+		goto copy_piggy_link;
+
+	/*
+	 * Check if the piggydata binary will be overwritten
+	 * by the uncompressed binary or by the pbl relocation
+	 */
+	if (!offset ||
+	    !((pg_start >= TEXT_BASE && pg_start < TEXT_BASE + pg_len * 4) ||
+	      ((uint32_t)_text >= pg_start && (uint32_t)_text <= pg_end)))
+		goto copy_link;
+
+copy_piggy_link:
+	/*
+	 * copy piggydata binary to its link address
+	 */
+	memcpy(&input_data, (void *)pg_start, pg_len);
+	pg_start = (uint32_t)&input_data;
+
+copy_link:
 	/* relocate to link address if necessary */
 	if (offset)
 		memcpy((void *)_text, (void *)(_text - offset),
@@ -69,12 +119,13 @@ 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));
 
-	r = (unsigned int)&barebox_pbl;
+	r = (unsigned int)&barebox_uncompress;
 	/* call barebox_uncompress with its absolute address */
 	__asm__ __volatile__(
 		"mov r0, %1\n"
+		"mov r1, %2\n"
 		"mov pc, %0\n"
 		:
-		: "r"(r), "r"(offset),
-		: "r0");
+		: "r"(r), "r"(pg_start), "r"(pg_len)
+		: "r0", "r1");
 }
diff --git a/arch/arm/pbl/zbarebox.lds.S b/arch/arm/pbl/zbarebox.lds.S
index d587090..2dca278 100644
--- a/arch/arm/pbl/zbarebox.lds.S
+++ b/arch/arm/pbl/zbarebox.lds.S
@@ -74,4 +74,5 @@ SECTIONS
 	__piggydata_end = .;
 
 	_barebox_image_size = __piggydata_end - HEAD_TEXT_BASE;
+	_barebox_pbl_size = __bss_start - HEAD_TEXT_BASE;
 }
diff --git a/common/Kconfig b/common/Kconfig
index 7b5a307..828fc05 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -111,11 +111,20 @@ config PBL_IMAGE
 	bool "Pre-Bootloader image"
 	depends on HAVE_PBL_IMAGE
 
+config PBL_FORCE_PIGGYDATA_COPY
+	bool
+	help
+	  In some case we need to copy the PIGGYDATA as the link address
+	  as example we run from SRAM and shutdown the SDRAM/DDR for
+	  reconfiguration but most of the time we just need to copy the
+	  executable code.
+
 if PBL_IMAGE
 
 config IMAGE_COMPRESSION
-	bool "Compressed image"
+	bool
 	depends on HAVE_IMAGE_COMPRESSION
+	default y
 
 if IMAGE_COMPRESSION
 
@@ -511,6 +520,7 @@ 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
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index 5484b6f..17d5fd1 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -7,8 +7,10 @@ extern char __bare_init_start[], __bare_init_end[];
 extern char _end[];
 extern void *_barebox_image_size;
 extern void *_barebox_bare_init_size;
+extern void *_barebox_pbl_size;
 
 #define barebox_image_size	(unsigned int)&_barebox_image_size
 #define barebox_bare_init_size	(unsigned int)&_barebox_bare_init_size
+#define barebox_pbl_size	(unsigned int)&_barebox_pbl_size
 
 #endif /* _ASM_GENERIC_SECTIONS_H_ */
-- 
1.7.10.4


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[PATCH 06/12] 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 07/12] 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-pbl.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/cpu/start-pbl.c b/arch/arm/cpu/start-pbl.c
index 17e0829..dd5c483 100644
--- a/arch/arm/cpu/start-pbl.c
+++ b/arch/arm/cpu/start-pbl.c
@@ -23,11 +23,15 @@
 
 #include <common.h>
 #include <init.h>
+#include <sizes.h>
 #include <asm/barebox-arm.h>
 #include <asm/barebox-arm-head.h>
 #include <asm-generic/memory_layout.h>
 #include <asm/sections.h>
 
+unsigned long free_mem_ptr;
+unsigned long free_mem_end_ptr;
+
 void __naked __section(.text_head_entry) pbl_start(void)
 {
 	barebox_arm_head();
@@ -46,6 +50,10 @@ static void barebox_uncompress(void *compressed_start, unsigned int len)
 {
 	void (*barebox)(void);
 
+	/* 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;
+
 	if (IS_ENABLED(CONFIG_THUMB2_BAREBOX))
 		barebox = (void *)(TEXT_BASE + 1);
 	else
-- 
1.7.10.4


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[PATCH 08/12] compressed image: add gzip support

[Jean-Christophe PLAGNIOL-VILLARD]

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 arch/arm/cpu/start-pbl.c  |    4 ++++
 arch/arm/pbl/Makefile     |    1 +
 arch/arm/pbl/piggy.gzip.S |    6 ++++++
 common/Kconfig            |    4 ++++
 lib/decompress_inflate.c  |    1 +
 5 files changed, 16 insertions(+)
 create mode 100644 arch/arm/pbl/piggy.gzip.S

diff --git a/arch/arm/cpu/start-pbl.c b/arch/arm/cpu/start-pbl.c
index dd5c483..004ba6a 100644
--- a/arch/arm/cpu/start-pbl.c
+++ b/arch/arm/cpu/start-pbl.c
@@ -46,6 +46,10 @@ extern void *input_data_end;
 #include "../../../lib/decompress_unlzo.c"
 #endif
 
+#ifdef CONFIG_IMAGE_COMPRESSION_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
 static 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 828fc05..b97392c 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -134,6 +134,9 @@ choice
 config IMAGE_COMPRESSION_LZO
 	bool "lzo"
 
+config IMAGE_COMPRESSION_GZIP
+	bool "gzip"
+
 endchoice
 
 endif
@@ -521,6 +524,7 @@ config DEFAULT_ENVIRONMENT_COMPRESSED
 	bool
 	depends on DEFAULT_ENVIRONMENT
 	depends on !IMAGE_COMPRESSION_LZO
+	depends on !IMAGE_COMPRESSION_GZIP
 	default y if ZLIB
 	default y if BZLIB
 	default y if LZO_DECOMPRESS
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 09/12] ARM pbl: Add .gitignore for generated files

[Jean-Christophe PLAGNIOL-VILLARD]

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

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 arch/arm/pbl/.gitignore |    5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 arch/arm/pbl/.gitignore

diff --git a/arch/arm/pbl/.gitignore b/arch/arm/pbl/.gitignore
new file mode 100644
index 0000000..3384d8b
--- /dev/null
+++ b/arch/arm/pbl/.gitignore
@@ -0,0 +1,5 @@
+piggy.gzip
+piggy.lzo
+zbarebox
+zbarebox.bin
+zbarebox.lds
-- 
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 v4] Add Pre-Bootloader support

[Sascha Hauer]

On Fri, Aug 03, 2012 at 12:23:00PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> are available in the git repository at:
> 
>   git://git.jcrosoft.org/barebox.git tags/pbl
> 
> for you to fetch changes up to 1d861eb2a6384495261122f183842fcd8a8e059e:
> 
>   arm: always enable the garbage collector for pbl (2012-08-03 18:09:16 +0800)
> 

I applied this series for next. This is not complete yet, so before this
series hits any release, the following should happen:

- Currently most boards do not compile with compression enabled. This is
  because the pbl needs the lowlevel init functions. Most boards fail
  with 'undefined reference to board_init_lowlevel'. To fix this a
  pbl-y += lowlevel.o is needed.
  Unfortunately there is a class of boards which silently fail with
  image compression, namely all i.MX boards which compile with internal
  boot mode. Here the flash header is just missing when not explicitly
  enabled for pbl.
- The SoCs which generate some SoC specific image (OMAP -> MLO, Netx ->
  barebox.netx) only generate the compressed binary, but not the SoC
  specific file.
- Documentation to be written.

I have a patch in preparation to fix the first two topics.

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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[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 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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