armv7: add wrapper for tlbimvaa

This adds an inline wrapper for the TLBIMVAA instruction (invalidate
unified TLB by MVA, all address space identifiers).

Change-Id: Ibcd289ecedaba8586ade26e36c177ff1fcaf91d3
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/3161
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)

src/arch/armv7/include/arch/cache.h

@@ -108,6 +108,12 @@ static inline void tlbiall(void)
 	asm volatile ("mcr p15, 0, %0, c8, c7, 0" : : "r" (0) : "memory");
 }
 
+/* invalidate unified TLB by MVA, all ASID */
+static inline void tlbimvaa(unsigned long mva)
+{
+	asm volatile ("mcr p15, 0, %0, c8, c7, 3" : : "r" (mva) : "memory");
+}
+
 /* write data access control register (DACR) */
 static inline void write_dacr(uint32_t val)
 {