add some basic infrastructure for qemu-system-m68k

Qemu emulates a Coldfire Evaluation board without MMU.
As that is the first non-MMU platform in OpenADK I added
ADK_TARGET_UCLINUX. Mksh can not be used for non-MMU, because
it requires fork() for job control and other things.
We use hush here. non-MMU support in uClibc does not have
shared library support.

Kernel does not start yet. So no runtime testing, but at least
coldfire toolchain can be tested with uClibc-ng.

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

8 files changed, 26 insertions, 2 deletions

diff --git a/target/config/Config.in b/target/config/Config.in
index 5187c9bac..38f8090dd 100644
--- a/target/config/Config.in
+++ b/target/config/Config.in
@@ -14,6 +14,10 @@ config ADK_TOOLCHAIN_ONLY
 config ADK_TARGET_TOOLCHAIN
 	boolean
 
+config ADK_TARGET_UCLINUX
+	select ADK_TARGET_USE_STATIC_LIBS
+	boolean
+
 config ADK_TARGET_QEMU
 	boolean
 
diff --git a/target/config/Config.in.cpu b/target/config/Config.in.cpu
index 3ab984484..ed612b9df 100644
--- a/target/config/Config.in.cpu
+++ b/target/config/Config.in.cpu
@@ -107,6 +107,9 @@ config ADK_CPU_CORTEX_A9
 config ADK_CPU_ARMV8
 	boolean
 
+config ADK_CPU_CF_5208
+	boolean
+
 config ADK_TARGET_CPU_ARCH
 	string
 	default "aarch64" if ADK_LINUX_AARCH64 && ADK_little
diff --git a/target/config/Config.in.kernel b/target/config/Config.in.kernel
index 28d8ef276..94b5dfefb 100644
--- a/target/config/Config.in.kernel
+++ b/target/config/Config.in.kernel
@@ -52,6 +52,7 @@ config ADK_TARGET_KERNEL_MINICONFIG
 	default "qemu-x86_64" if ADK_TARGET_SYSTEM_QEMU_X86_64
 	default "qemu-xtensa" if ADK_TARGET_SYSTEM_QEMU_XTENSA
 	default "qemu-alpha" if ADK_TARGET_SYSTEM_QEMU_ALPHA
+	default "qemu-m68k" if ADK_TARGET_SYSTEM_QEMU_M68K
 	default "aranym-m68k" if ADK_TARGET_SYSTEM_ARANYM_M68K
 	default "vbox-x86" if ADK_TARGET_SYSTEM_VBOX_X86
 	default "ibm-x40" if ADK_TARGET_SYSTEM_IBM_X40
diff --git a/target/config/Config.in.libc.choice b/target/config/Config.in.libc.choice
index 41905898c..e95e48e96 100644
--- a/target/config/Config.in.libc.choice
+++ b/target/config/Config.in.libc.choice
@@ -23,6 +23,7 @@ config ADK_TARGET_LIB_MUSL
 	prompt "musl C library"
 	boolean
 	select ADK_musl
+	depends on !ADK_TARGET_UCLINUX
 	depends on \
 		ADK_LINUX_ARM || \
 		ADK_LINUX_MICROBLAZE || \
@@ -39,6 +40,7 @@ config ADK_TARGET_LIB_GLIBC
 	boolean
 	select ADK_glibc
 	depends on !ADK_LINUX_XTENSA
+	depends on !ADK_TARGET_UCLINUX
 	help
 	  http://www.gnu.org/libc
 
diff --git a/target/config/Config.in.libc.default b/target/config/Config.in.libc.default
index cd160a4cb..6d094cf05 100644
--- a/target/config/Config.in.libc.default
+++ b/target/config/Config.in.libc.default
@@ -23,9 +23,7 @@ config ADK_TARGET_LIBC
 config ADK_TARGET_WITH_NPTL
 	boolean
 	default n if ADK_TARGET_LIB_UCLIBC_NG && ADK_LINUX_M68K
-	default n if ADK_TARGET_LIB_UCLIBC_NG && ADK_LINUX_MICROBLAZE
 	default n if ADK_TARGET_LIB_UCLIBC && ADK_LINUX_M68K
-	default n if ADK_TARGET_LIB_UCLIBC && ADK_LINUX_MICROBLAZE
 	default y
 
 config ADK_TARGET_SUFFIX
diff --git a/target/config/Config.in.runtime b/target/config/Config.in.runtime
index b7bc2462d..1f70460e8 100644
--- a/target/config/Config.in.runtime
+++ b/target/config/Config.in.runtime
@@ -150,6 +150,7 @@ config ADK_RUNTIME_KBD_LAYOUT
 
 choice
 prompt "initial login shell for the root user"
+default ADK_ROOTSH_HUSH if ADK_TARGET_UCLINUX
 default ADK_ROOTSH_MKSH
 
 config ADK_ROOTSH_MKSH
@@ -159,6 +160,12 @@ config ADK_ROOTSH_MKSH
 	  Use mksh (a Korn Shell variant) as standard login shell
 	  for the superuser.
 
+config ADK_ROOTSH_HUSH
+	select ADK_PACKAGE_HUSH if !ADK_TOOLCHAIN_ONLY
+	bool "hush (Shell compatible with non-MMU systems)"
+	help
+	  hush shell from busybox.
+
 config ADK_ROOTSH_ASH
 	select BUSYBOX_ASH
 	bool "ash (busybox)"
@@ -190,6 +197,7 @@ endchoice
 
 choice
 prompt "system /bin/sh (POSIX script shell)"
+default ADK_BINSH_HUSH if ADK_TARGET_UCLINUX
 default ADK_BINSH_MKSH
 
 config ADK_BINSH_MKSH
@@ -199,6 +207,12 @@ config ADK_BINSH_MKSH
 	  Use mksh (a Korn Shell variant) as system shell, which is
 	  both small and powerful, so quite suited for this task.
 
+config ADK_BINSH_HUSH
+	select ADK_PACKAGE_HUSH if !ADK_TOOLCHAIN_ONLY
+	bool "hush (busybox)"
+	help
+	  hush shell.
+
 config ADK_BINSH_ASH
 	select BUSYBOX_ASH
 	bool "ash (busybox)"
diff --git a/target/config/Config.in.target b/target/config/Config.in.target
index 6887df312..d0ed59bfe 100644
--- a/target/config/Config.in.target
+++ b/target/config/Config.in.target
@@ -3,6 +3,7 @@
 
 config ADK_TARGET_CFLAGS
 	string
+	default "-march=isaaplus -mcpu=5208" if ADK_CPU_CF_5208
 	default "-mcpu=v7.10.d" if ADK_CPU_MICROBLAZE
 	default "-m4 -ml" if ADK_CPU_SH4 && ADK_little
 	default "-m4 -mb" if ADK_CPU_SH4 && ADK_big
diff --git a/target/config/Config.in.toolchain b/target/config/Config.in.toolchain
index bda929a88..9a799d72c 100644
--- a/target/config/Config.in.toolchain
+++ b/target/config/Config.in.toolchain
@@ -128,6 +128,7 @@ config ADK_DEBUG_STRIP
 config ADK_TARGET_USE_STATIC_LIBS
 	bool "Link applications statically by default"
 	default n
+	default y if ADK_TARGET_UCLINUX
 	select BUSYBOX_STATIC
 	help
 	  Useful for debugging of dynamic linker problems. Be aware of the fact, that uClibc and glibc