Add stubdomain support. See stubdom/README for usage details.

- Move PAGE_SIZE and STACK_SIZE into __PAGE_SIZE and __STACK_SIZE in
  arch_limits.h so as to permit getting them from there without
  pulling all the internal Mini-OS defines.
- Setup a xen-elf cross-compilation environment in stubdom/cross-root
- Add a POSIX layer on top of Mini-OS by linking against the newlib C
  library and lwIP, and implementing the Unixish part in mini-os/lib/sys.c
- Cross-compile zlib and libpci too.
- Add an xs.h-compatible layer on top of Mini-OS' xenbus.
- Cross-compile libxc with an additional xc_minios.c and a few things
  disabled.
- Cross-compile ioemu with an additional block-vbd, but without sound,
  tpm and other details.  A few hacks are needed:
  - Align ide and scsi buffers at least on sector size to permit
  direct transmission to the block backend. While we are at it, just
  page-align it to possibly save a segment. Also, limit the scsi
  buffer size because of limitations of the block paravirtualization
  protocol.
  - Allocate big tables dynamically rather that letting them go to
  bss: when Mini-OS gets installed in memory, bss is not lazily
  allocated, and doing so during Mini-OS is unnecessarily trick while
  we can simply use malloc.
- Had to change the Mini-OS compilation somehow, so as to export
  Mini-OS compilation flags to the Makefiles of libxc and ioemu.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/extras/mini-os/Config.mk b/extras/mini-os/Config.mk
new file mode 100644
index 0000000000..e38fae99cb
--- /dev/null
+++ b/extras/mini-os/Config.mk
@@ -0,0 +1,76 @@
+# Set mini-os root path, used in mini-os.mk.
+MINI-OS_ROOT=$(XEN_ROOT)/extras/mini-os
+export MINI-OS_ROOT
+
+ifeq ($(XEN_TARGET_ARCH),x86_32)
+export pae ?= y
+endif
+libc = $(stubdom)
+
+XEN_INTERFACE_VERSION := 0x00030205
+export XEN_INTERFACE_VERSION
+
+# 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 $(XEN_TARGET_ARCH) -> for ia64, ...
+ifeq ($(findstring x86_,$(XEN_TARGET_ARCH)),x86_)
+TARGET_ARCH_FAM = x86
+else
+TARGET_ARCH_FAM = $(XEN_TARGET_ARCH)
+endif
+
+# The architecture family directory below mini-os.
+TARGET_ARCH_DIR := arch/$(TARGET_ARCH_FAM)
+
+# Export these variables for possible use in architecture dependent makefiles.
+export TARGET_ARCH_DIR
+export TARGET_ARCH_FAM
+export XEN_TARGET_X86_PAE 
+
+# This is used for architecture specific links.
+# This can be overwritten from arch specific rules.
+ARCH_LINKS =
+
+# The path pointing to the architecture specific header files.
+ARCH_INC := $(TARGET_ARCH_FAM)
+
+# For possible special header directories.
+# This can be overwritten from arch specific rules.
+EXTRA_INC = $(ARCH_INC)	
+
+# Include the architecture family's special makerules.
+# This must be before include minios.mk!
+include $(MINI-OS_ROOT)/$(TARGET_ARCH_DIR)/arch.mk
+
+extra_incl := $(foreach dir,$(EXTRA_INC),-I$(MINI-OS_ROOT)/include/$(dir))
+
+DEF_CPPFLAGS += -I$(MINI-OS_ROOT)/include
+
+ifeq ($(stubdom),y)
+DEF_CPPFLAGS += -DCONFIG_STUBDOM
+endif
+
+ifeq ($(libc),y)
+DEF_CPPFLAGS += -DHAVE_LIBC
+DEF_CPPFLAGS += -I$(MINI-OS_ROOT)/include/posix
+DEF_CPPFLAGS += -I$(XEN_ROOT)/tools/xenstore
+endif
+
+ifneq ($(LWIPDIR),)
+lwip=y
+DEF_CPPFLAGS += -DHAVE_LWIP
+DEF_CPPFLAGS += -I$(LWIPDIR)/src/include
+DEF_CPPFLAGS += -I$(LWIPDIR)/src/include/ipv4
+endif
+
+ifneq ($(QEMUDIR),)
+qemu=y
+endif
+
+ifneq ($(CAMLDIR),)
+caml=y
+endif
+
+ifeq ($(pae),y)
+DEF_CPPFLAGS += -DCONFIG_X86_PAE
+endif