bring coldfire support in shape

Binutils 2.24 is required to get a working kernel.
Ethernet in Qemu is still broken.
Qemu Patch is still rquired in 2.2.0.
Only kernel+initramfs is working.
It seems the signal handler problem is gone with
sash and simpleinit.

1 files changed, 24 insertions, 0 deletions

diff --git a/target/m68k/qemu-m68k/patches/3.14.26/qemu-coldfire.patch b/target/m68k/qemu-m68k/patches/3.14.26/qemu-coldfire.patch
new file mode 100644
index 000000000..5bbda8c4d
--- /dev/null
+++ b/target/m68k/qemu-m68k/patches/3.14.26/qemu-coldfire.patch
@@ -0,0 +1,24 @@
+m68k: enabled software emulation of separate supervisor/user stack
+
+Recent Coldfires have separate supervisor and user stack pointers, but
+since older Coldfires didn't have that, the Linux kernel has a kind of
+emulation mechanism for those pointers.
+
+Apparently, according to the Kconfig.cpu file, the 5208 is supposed to
+support such separate pointers, but Qemu doesn't implement it. So we
+cheat a bit here and force the usage of emulated separate stack
+pointers.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
+
+diff -Nur linux-3.14.26.orig/arch/m68k/Kconfig.cpu linux-3.14.26/arch/m68k/Kconfig.cpu
+--- linux-3.14.26.orig/arch/m68k/Kconfig.cpu	2014-12-06 17:56:06.000000000 -0600
++++ linux-3.14.26/arch/m68k/Kconfig.cpu	2014-12-28 03:00:39.279037664 -0600
+@@ -146,6 +146,7 @@
+ 	depends on !MMU
+ 	select GENERIC_CLOCKEVENTS
+ 	select HAVE_CACHE_SPLIT
++	select COLDFIRE_SW_A7
+ 	help
+ 	   Freescale Coldfire 5207/5208 processor support.
+