use broken-out patches for the coldfire to make it easier to follow differences again...

[15.05/openwrt.git] / target / linux / coldfire / patches / 053-mcfv4e_brcache_inval.patch

diff --git a/target/linux/coldfire/patches/053-mcfv4e_brcache_inval.patch b/target/linux/coldfire/patches/053-mcfv4e_brcache_inval.patch
new file mode 100644 (file)
index 0000000..dc551ba
--- /dev/null
+++ b/target/linux/coldfire/patches/053-mcfv4e_brcache_inval.patch
@@ -0,0 +1,42 @@
+From eba69831e8f35174e2e15e373a66f40dc0be8929 Mon Sep 17 00:00:00 2001
+From: Kurt Mahan <kmahan@freescale.com>
+Date: Wed, 14 May 2008 12:23:12 -0600
+Subject: [PATCH] Force branch-cache invalidate on task switch.
+
+When finishing a task switch make sure the branch cache
+gets invalidated to ensure no stale entries exist for
+the next user space.
+
+LTIBName: mcfv4e-brcache-inval
+Signed-off-by: Kurt Mahan <kmahan@freescale.com>
+---
+ include/asm-m68k/system.h |   15 +++++++++++++++
+ 1 files changed, 15 insertions(+), 0 deletions(-)
+
+--- a/include/asm-m68k/system.h
++++ b/include/asm-m68k/system.h
+@@ -5,9 +5,24 @@
+ #include <linux/kernel.h>
+ #include <asm/segment.h>
+ #include <asm/entry.h>
++#include <asm/cfcache.h>
+ 
+ #ifdef __KERNEL__
+ 
++#ifdef CONFIG_COLDFIRE
++#define FLUSH_BC        (0x00040000)
++
++#define finish_arch_switch(prev) do {         \
++      unsigned long tmpreg;                   \
++      asm volatile ( "move.l %2,%0\n"         \
++                     "orl %1,%0\n"            \
++                     "movec %0,%%cacr"        \
++                     : "=&d" (tmpreg)         \
++                     : "id" (FLUSH_BC), "m" (shadow_cacr));   \
++      } while(0)
++
++#endif
++
+ /*
+  * switch_to(n) should switch tasks to task ptr, first checking that
+  * ptr isn't the current task, in which case it does nothing.  This