[MINIOS] New make structure to support different architectures.

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

extras/mini-os/Makefile

@@ -1,112 +1,88 @@
-debug ?= y
+# Common Makefile for mini-os.
+#
+# Every architecture directory below mini-os/arch has to have a
+# Makefile and a arch.mk.
+#
+
 pae ?= n
 
 XEN_ROOT = ../..
 include $(XEN_ROOT)/Config.mk
 
-# Set TARGET_ARCH
-override TARGET_ARCH     := $(XEN_TARGET_ARCH)
-
 XEN_INTERFACE_VERSION := 0x00030204
+export XEN_INTERFACE_VERSION
 
-# NB. '-Wcast-qual' is nasty, so I omitted it.
-CFLAGS := -fno-builtin -Wall -Werror -Wredundant-decls -Wno-format
-CFLAGS += -Wstrict-prototypes -Wnested-externs -Wpointer-arith -Winline
-CFLAGS += -D__XEN_INTERFACE_VERSION__=$(XEN_INTERFACE_VERSION)
+# Set TARGET_ARCH
+override TARGET_ARCH := $(XEN_TARGET_ARCH)
 
-ASFLAGS = -D__ASSEMBLY__
+# Set mini-os root path, used in mini-os.mk.
+MINI-OS_ROOT=$(PWD)
+export MINI-OS_ROOT
 
-LDLIBS =  -L. -lminios
-LDFLAGS_FINAL := -N -T minios-$(TARGET_ARCH).lds
-LDFLAGS :=
+# Try to find out the architecture family TARGET_ARCH_FAM.
+# First check whether x86_... is contained (for x86_32, x86_32y, x86_64).
+# If not x86 then use $(TARGET_ARCH) -> for ia64, ...
+ifeq ($(findstring x86_,$(TARGET_ARCH)),x86_)
+TARGET_ARCH_FAM = x86
+else
+TARGET_ARCH_FAM = $(TARGET_ARCH)
+endif
+
+# The architecture family directory below mini-os.
+TARGET_ARCH_DIR := arch/$(TARGET_ARCH_FAM)
+
+# Export these variables for possible use in architecture dependent makefiles.
+export TARGET_ARCH
+export TARGET_ARCH_DIR
+export TARGET_ARCH_FAM
+
+# This is used for architecture specific links.
+# This can be overwritten from arch specific rules.
+ARCH_LINKS =
+
+# For possible special header directories.
+# This can be overwritten from arch specific rules.
+EXTRA_INC =
+
+# Special build dependencies.
+# Build all after touching this/these file(s) (see minios.mk)
+SPEC_DEPENDS = minios.mk
+
+# Include the architecture family's special makerules.
+# This must be before include minios.mk!
+include $(TARGET_ARCH_DIR)/arch.mk
+
+# Include common mini-os makerules.
+include minios.mk
+
+# Define some default flags for linking.
+LDLIBS := 
+LDFLAGS := 
+LDARCHLIB := -L$(TARGET_ARCH_DIR) -l$(ARCH_LIB_NAME)
+LDFLAGS_FINAL := -N -T $(TARGET_ARCH_DIR)/minios-$(TARGET_ARCH).lds
 
 # Prefix for global API names. All other symbols are localised before
 # linking with EXTRA_OBJS.
 GLOBAL_PREFIX := xenos_
 EXTRA_OBJS =
 
-# For possible special source directories.
-EXTRA_SRC =
-# For possible special header directories.
-EXTRA_INC =
-
-# Standard name for architecture specific subdirectories.
-TARGET_ARCH_DIR = $(TARGET_ARCH)
-# This is used for architecture specific links.
-ARCH_LINKS =
-
-ifeq ($(TARGET_ARCH),x86_32)
-CFLAGS += -m32 -march=i686
-LDFLAGS += -m elf_i386
-TARGET_ARCH_DIR = x86
-EXTRA_INC += $(TARGET_ARCH_DIR)/$(TARGET_ARCH)
-EXTRA_SRC += arch/$(EXTRA_INC)
-endif
-
-ifeq ($(TARGET_ARCH)$(pae),x86_32y)
-CFLAGS  += -DCONFIG_X86_PAE=1
-ASFLAGS += -DCONFIG_X86_PAE=1
-TARGET_ARCH_DIR = x86
-EXTRA_INC += $(TARGET_ARCH_DIR)/$(TARGET_ARCH)
-EXTRA_SRC += arch/$(EXTRA_INC)
-endif
-
-ifeq ($(TARGET_ARCH),x86_64)
-CFLAGS += -m64 -mno-red-zone -fpic -fno-reorder-blocks
-CFLAGS += -fno-asynchronous-unwind-tables
-LDFLAGS += -m elf_x86_64
-TARGET_ARCH_DIR = x86
-EXTRA_INC += $(TARGET_ARCH_DIR)/$(TARGET_ARCH)
-EXTRA_SRC += arch/$(EXTRA_INC)
-endif
-
-ifeq ($(TARGET_ARCH),ia64)
-CFLAGS += -mfixed-range=f2-f5,f12-f15,f32-f127 -mconstant-gp
-ASFLAGS += -x assembler-with-cpp -Wall
-ASFLAGS += -mfixed-range=f2-f5,f12-f15,f32-f127 -fomit-frame-pointer
-ASFLAGS += -fno-builtin -fno-common -fno-strict-aliasing -mconstant-gp
-ARCH_LINKS = IA64_LINKS		# Special link on ia64 needed
-define arch_links
-[ -e include/ia64/asm-xsi-offsets.h ] || ln -sf ../../../../xen/include/asm-ia64/asm-xsi-offsets.h include/ia64/asm-xsi-offsets.h
-endef
-endif
-
-ifeq ($(debug),y)
-CFLAGS += -g
-else
-CFLAGS += -O3
-endif
-
-# Add the special header directories to the include paths.
-extra_incl := $(foreach dir,$(EXTRA_INC),-Iinclude/$(dir))
-override CPPFLAGS := -Iinclude $(CPPFLAGS) -Iinclude/$(TARGET_ARCH_DIR)	$(extra_incl)
-
 TARGET := mini-os
 
-HEAD := $(TARGET_ARCH).o
+# Subdirectories common to mini-os
+SUBDIRS := lib xenbus console
+
+# The common mini-os objects to build.
 OBJS := $(patsubst %.c,%.o,$(wildcard *.c))
 OBJS += $(patsubst %.c,%.o,$(wildcard lib/*.c))
 OBJS += $(patsubst %.c,%.o,$(wildcard xenbus/*.c))
 OBJS += $(patsubst %.c,%.o,$(wildcard console/*.c))
-OBJS += $(patsubst %.S,%.o,$(wildcard arch/$(TARGET_ARCH_DIR)/*.S))
-OBJS += $(patsubst %.c,%.o,$(wildcard arch/$(TARGET_ARCH_DIR)/*.c))
-# For special wanted source directories.
-extra_objs := $(foreach dir,$(EXTRA_SRC),$(patsubst %.c,%.o,$(wildcard $(dir)/*.c)))
-OBJS += $(extra_objs)
-extra_objs := $(foreach dir,$(EXTRA_SRC),$(patsubst %.S,%.o,$(wildcard $(dir)/*.S)))
-OBJS += $(extra_objs)
 
-HDRS := $(wildcard include/*.h)
-HDRS += $(wildcard include/xen/*.h)
-HDRS += $(wildcard include/$(TARGET_ARCH_DIR)/*.h)
-# For special wanted header directories.
-extra_heads := $(foreach dir,$(EXTRA_INC),$(wildcard $(dir)/*.h))
-HDRS += $(extra_heads)
 
 .PHONY: default
 default: $(TARGET)
 
-# Create special architecture specific links.
+# Create special architecture specific links. The function arch_links
+# has to be defined in arch.mk (see include above).
 ifneq ($(ARCH_LINKS),)
 $(ARCH_LINKS):
 	$(arch_links)
@@ -116,24 +92,29 @@ endif
 links:	$(ARCH_LINKS)
 	[ -e include/xen ] || ln -sf ../../../xen/include/public include/xen
 
-$(TARGET): links $(OBJS) $(HEAD)
-	$(LD) -r $(LDFLAGS) $(HEAD) $(OBJS) -o $@.o
+.PHONY: arch_lib
+arch_lib:
+	$(MAKE) --directory=$(TARGET_ARCH_DIR) || exit 1;
+
+$(TARGET): links $(OBJS) arch_lib
+	$(LD) -r $(LDFLAGS) $(HEAD_OBJ) $(OBJS) $(LDARCHLIB) -o $@.o
 	$(OBJCOPY) -w -G $(GLOBAL_PREFIX)* -G _start $@.o $@.o
 	$(LD) $(LDFLAGS) $(LDFLAGS_FINAL) $@.o $(EXTRA_OBJS) -o $@
 	gzip -f -9 -c $@ >$@.gz
 
-.PHONY: clean
-clean:
-	find . -type f -name '*.o' | xargs rm -f
-	rm -f *.o *~ core $(TARGET) $(TARGET).gz
+.PHONY: clean arch_clean
+
+arch_clean:
+	$(MAKE) --directory=$(TARGET_ARCH_DIR) clean || exit 1;
+
+clean:	arch_clean
+	for dir in $(SUBDIRS); do \
+		rm -f $$dir/*.o; \
+	done
+	rm -f *.o *~ core $(TARGET).elf $(TARGET).raw $(TARGET) $(TARGET).gz
 	find . -type l | xargs rm -f
 	rm -f tags TAGS
 
-%.o: %.c $(HDRS) Makefile
-	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
-
-%.o: %.S $(HDRS) Makefile
-	$(CC) $(ASFLAGS) $(CPPFLAGS) -c $< -o $@
 
 define all_sources
      ( find . -follow -name SCCS -prune -o -name '*.[chS]' -print )
@@ -147,3 +128,4 @@ cscope:
 .PHONY: tags
 tags:
 	$(all_sources) | xargs ctags
+

extras/mini-os/arch/x86/Makefile

@@ -0,0 +1,29 @@
+#
+# x86 architecture specific makefiles.
+# It's is used for x86_32, x86_32y and x86_64
+#
+
+# Rebuild all after touching this/these extra file(s) (see mini-os.mk)
+SPEC_DEP = arch.mk
+
+# include arch.mk has to be before mini-os.mk!
+include arch.mk
+include ../../minios.mk
+
+# Sources here are all *.c *.S without $(TARGET_ARCH).S
+# This is handled in $(HEAD_ARCH_OBJ)
+ARCH_SRCS := $(wildcard *.c)
+
+# The objects built from the sources.
+ARCH_OBJS := $(patsubst %.c,%.o,$(ARCH_SRCS))
+
+all: $(ARCH_LIB)
+
+# $(HEAD_ARCH_OBJ) is only build here, needed on linking
+# in ../../Makefile.
+$(ARCH_LIB): $(ARCH_OBJS) $(HEAD_ARCH_OBJ)
+	$(AR) rv $(ARCH_LIB) $(ARCH_OBJS)
+
+clean:
+	rm -f $(ARCH_LIB) $(ARCH_OBJS)
+

extras/mini-os/arch/x86/arch.mk

@@ -0,0 +1,28 @@
+#
+# Architecture special makerules for x86 family
+# (including x86_32, x86_32y and x86_64).
+#
+
+ifeq ($(TARGET_ARCH),x86_32)
+ARCH_CFLAGS  := -m32 -march=i686
+ARCH_LDFLAGS := -m elf_i386
+EXTRA_INC += $(TARGET_ARCH_FAM)/$(TARGET_ARCH)
+EXTRA_SRC += arch/$(EXTRA_INC)
+endif
+
+ifeq ($(TARGET_ARCH)$(pae),x86_32y)
+ARCH_CFLAGS  := -DCONFIG_X86_PAE=1
+ARCH_ASFLAGS := -DCONFIG_X86_PAE=1
+EXTRA_INC += $(TARGET_ARCH_FAM)/$(TARGET_ARCH)
+EXTRA_SRC += arch/$(EXTRA_INC)
+endif
+
+ifeq ($(TARGET_ARCH),x86_64)
+ARCH_CFLAGS := -m64 -mno-red-zone -fpic -fno-reorder-blocks
+ARCH_CFLAGS := -fno-asynchronous-unwind-tables
+ARCH_LDFLAGS := -m elf_x86_64
+EXTRA_INC += $(TARGET_ARCH_FAM)/$(TARGET_ARCH)
+EXTRA_SRC += arch/$(EXTRA_INC)
+endif
+
+

extras/mini-os/minios.mk

@@ -0,0 +1,62 @@
+#
+# The file contains the common make rules for building mini-os.
+#
+
+debug = y
+
+# Define some default flags.
+# NB. '-Wcast-qual' is nasty, so I omitted it.
+DEF_CFLAGS := -fno-builtin -Wall -Werror -Wredundant-decls -Wno-format
+DEF_CFLAGS += -Wstrict-prototypes -Wnested-externs -Wpointer-arith -Winline
+DEF_CFLAGS += -D__XEN_INTERFACE_VERSION__=$(XEN_INTERFACE_VERSION)
+
+DEF_ASFLAGS = -D__ASSEMBLY__
+
+ifeq ($(debug),y)
+DEF_CFLAGS += -g
+else
+DEF_CFLAGS += -O3
+endif
+
+# Build the CFLAGS and ASFLAGS for compiling and assembling.
+# DEF_... flags are the common mini-os flags,
+# ARCH_... flags may be defined in arch/$(TARGET_ARCH_FAM/rules.mk
+CFLAGS := $(DEF_CFLAGS) $(ARCH_CFLAGS)
+ASFLAGS := $(DEF_ASFLAGS) $(ARCH_ASFLAGS)
+
+# The path pointing to the architecture specific header files.
+ARCH_SPEC_INC := $(MINI-OS_ROOT)/include/$(TARGET_ARCH_FAM)
+
+# Find all header files for checking dependencies.
+HDRS := $(wildcard $(MINI-OS_ROOT)/include/*.h)
+HDRS += $(wildcard $(MINI-OS_ROOT)/include/xen/*.h)
+HDRS += $(wildcard $(ARCH_SPEC_INC)/*.h)
+# For special wanted header directories.
+extra_heads := $(foreach dir,$(EXTRA_INC),$(wildcard $(dir)/*.h))
+HDRS += $(extra_heads)
+
+# Add the special header directories to the include paths.
+extra_incl := $(foreach dir,$(EXTRA_INC),-I$(MINI-OS_ROOT)/include/$(dir))
+override CPPFLAGS := -I$(MINI-OS_ROOT)/include $(CPPFLAGS) -I$(ARCH_SPEC_INC)	$(extra_incl)
+
+# The name of the architecture specific library.
+# This is on x86_32: libx86_32.a
+# $(ARCH_LIB) has to built in the architecture specific directory.
+ARCH_LIB_NAME = $(TARGET_ARCH)
+ARCH_LIB := lib$(ARCH_LIB_NAME).a
+
+# This object contains the entrypoint for startup from Xen.
+# $(HEAD_ARCH_OBJ) has to be built in the architecture specific directory.
+HEAD_ARCH_OBJ := $(TARGET_ARCH).o
+HEAD_OBJ := $(TARGET_ARCH_DIR)/$(HEAD_ARCH_OBJ)
+
+
+%.o: %.c $(HDRS) Makefile $(SPEC_DEPENDS)
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
+
+%.o: %.S $(HDRS) Makefile $(SPEC_DEPENDS)
+	$(CC) $(ASFLAGS) $(CPPFLAGS) -c $< -o $@
+
+
+
+