sh: Tidy up NEFF-based sign extension for SH-5.

This consolidates all of the NEFF-based sign extension for SH-5.
In the future the other SH code will need to make use of this as well,
so make it generic in preparation for more 32/64 consolidation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/mm/tlb-sh5.c

@@ -117,26 +117,15 @@ int sh64_put_wired_dtlb_entry(unsigned long long entry)
  * Load up a virtual<->physical translation for @eaddr<->@paddr in the
  * pre-allocated TLB slot @config_addr (see sh64_get_wired_dtlb_entry).
  */
-inline void sh64_setup_tlb_slot(unsigned long long config_addr,
-				unsigned long eaddr,
-				unsigned long asid,
-				unsigned long paddr)
+void sh64_setup_tlb_slot(unsigned long long config_addr, unsigned long eaddr,
+			 unsigned long asid, unsigned long paddr)
 {
 	unsigned long long pteh, ptel;
 
-	/* Sign extension */
-#if (NEFF == 32)
-	pteh = (unsigned long long)(signed long long)(signed long) eaddr;
-#else
-#error "Can't sign extend more than 32 bits yet"
-#endif
+	pteh = neff_sign_extend(eaddr);
 	pteh &= PAGE_MASK;
 	pteh |= (asid << PTEH_ASID_SHIFT) | PTEH_VALID;
-#if (NEFF == 32)
-	ptel = (unsigned long long)(signed long long)(signed long) paddr;
-#else
-#error "Can't sign extend more than 32 bits yet"
-#endif
+	ptel = neff_sign_extend(paddr);
 	ptel &= PAGE_MASK;
 	ptel |= (_PAGE_CACHABLE | _PAGE_READ | _PAGE_WRITE);
 
@@ -152,5 +141,5 @@ inline void sh64_setup_tlb_slot(unsigned long long config_addr,
  *
  * Teardown any existing mapping in the TLB slot @config_addr.
  */
-inline void sh64_teardown_tlb_slot(unsigned long long config_addr)
+void sh64_teardown_tlb_slot(unsigned long long config_addr)
 	__attribute__ ((alias("__flush_tlb_slot")));