ARM: 7502/1: contextidr: avoid using bfi instruction during notifier

The bfi instruction is not available on ARMv6, so instead use an and/orr sequence in the contextidr_notifier. This gets rid of the assembler error: Assembler messages: Error: selected processor does not support ARM mode `bfi r3,r2,#0,#8' Reported-by: Arnd Bergmann <[email protected]> Signed-off-by: Will Deacon <[email protected]> Signed-off-by: Russell King <[email protected]>
raspberrypi · Aug 25, 2012 · ae3790b · ae3790b
1 parent dbece45
commit ae3790b
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/arch/arm/mm/context.c b/arch/arm/mm/context.c
@@ -63,10 +63,11 @@ static int contextidr_notifier(struct notifier_block *unused, unsigned long cmd,
 	pid = task_pid_nr(thread->task) << ASID_BITS;
 	asm volatile(
 	"	mrc	p15, 0, %0, c13, c0, 1\n"
-	"	bfi	%1, %0, #0, %2\n"
-	"	mcr	p15, 0, %1, c13, c0, 1\n"
+	"	and	%0, %0, %2\n"
+	"	orr	%0, %0, %1\n"
+	"	mcr	p15, 0, %0, c13, c0, 1\n"
 	: "=r" (contextidr), "+r" (pid)
-	: "I" (ASID_BITS));
+	: "I" (~ASID_MASK));
 	isb();
 
 	return NOTIFY_OK;