MIPS: tlb-r3k: Move CP0.Wired register initialisation to `tlb_init'

Move the initialisation of the CP0.Wired register implemented by Toshiba
TX3922 and TX3927 processors from `tx39_cache_init' to `tlb_init' where
it belongs, correcting code structure and making sure initialisation
does not rely on `tx39_cache_init' being called before `tlb_init' to
work correctly.

Make `r3k_have_wired_reg' static as it's no longer externally referred
to; remove a stale declaration too.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10195/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/lib/r3k_dump_tlb.c

@@ -14,8 +14,6 @@
 #include <asm/pgtable.h>
 #include <asm/tlbdebug.h>
 
-extern int r3k_have_wired_reg;	/* defined in tlb-r3k.c */
-
 static void dump_tlb(int first, int last)
 {
 	int	i;

arch/mips/mm/c-tx39.c

@@ -28,8 +28,6 @@ static unsigned long icache_size, dcache_size;		/* Size in bytes */
 
 #include <asm/r4kcache.h>
 
-extern int r3k_have_wired_reg;	/* in r3k-tlb.c */
-
 /* This sequence is required to ensure icache is disabled immediately */
 #define TX39_STOP_STREAMING() \
 __asm__ __volatile__( \
@@ -383,8 +381,6 @@ void tx39_cache_init(void)
 	case CPU_TX3927:
 	default:
 		/* TX39/H2,H3 core (writeback 2way-set-associative cache) */
-		r3k_have_wired_reg = 1;
-		write_c0_wired(0);	/* set 8 on reset... */
 		/* board-dependent init code may set WBON */
 
 		__flush_cache_vmap	= tx39__flush_cache_vmap;

arch/mips/mm/tlb-r3k.c

@@ -36,7 +36,7 @@ extern void build_tlb_refill_handler(void);
 		"nop\n\t"		\
 		".set	pop\n\t")
 
-int r3k_have_wired_reg;		/* should be in cpu_data? */
+static int r3k_have_wired_reg;			/* Should be in cpu_data? */
 
 /* TLB operations. */
 static void local_flush_tlb_from(int entry)
@@ -280,6 +280,13 @@ void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1,
 
 void tlb_init(void)
 {
+	switch (current_cpu_type()) {
+	case CPU_TX3922:
+	case CPU_TX3927:
+		r3k_have_wired_reg = 1;
+		write_c0_wired(0);		/* Set to 8 on reset... */
+		break;
+	}
 	local_flush_tlb_from(0);
 	build_tlb_refill_handler();
 }