AArch64: Remove EL-agnostic TLB helper functions

Also, don't invalidate the TLBs in disable_mmu() function, it's better
to do it in enable_mmu() function just before actually enabling the
MMU.

Change-Id: Ib32d6660019b0b2c17254156aad4be67ab4970e1

include/aarch64/arch_helpers.h

@@ -48,8 +48,6 @@
 /*******************************************************************************
  * TLB maintenance accessor prototypes
  ******************************************************************************/
-extern void tlbiall(void);
-extern void tlbiallis(void);
 extern void tlbialle1(void);
 extern void tlbialle1is(void);
 extern void tlbialle2(void);

lib/arch/aarch64/tlb_helpers.S

@@ -30,8 +30,6 @@
 
 #include <arch_helpers.h>
 
-	.globl	tlbiall
-	.globl	tlbiallis
 	.globl	tlbialle1
 	.globl	tlbialle1is
 	.globl	tlbialle2
@@ -43,26 +41,6 @@
 
 	.section	.text, "ax"
 
-tlbiall:; .type tlbiall, %function
-	mrs	x0, CurrentEl
-	cmp	x0, #(MODE_EL1 << MODE_EL_SHIFT)
-	b.eq	tlbialle1
-	cmp	x0, #(MODE_EL2 << MODE_EL_SHIFT)
-	b.eq	tlbialle2
-	cmp	x0, #(MODE_EL3 << MODE_EL_SHIFT)
-	b.eq	tlbialle3
-
-
-tlbiallis:; .type tlbiallis, %function
-	mrs	x0, CurrentEl
-	cmp	x0, #(MODE_EL1 << MODE_EL_SHIFT)
-	b.eq	tlbialle1is
-	cmp	x0, #(MODE_EL2 << MODE_EL_SHIFT)
-	b.eq	tlbialle2is
-	cmp	x0, #(MODE_EL3 << MODE_EL_SHIFT)
-	b.eq	tlbialle3is
-
-
 tlbialle1:; .type tlbialle1, %function
 	tlbi	alle1
 	dsb	sy

plat/fvp/aarch64/fvp_common.c

@@ -461,7 +461,7 @@ void enable_mmu()
 		  TCR_RGN_INNER_WBA | TCR_T0SZ_4GB;
 	if (GET_EL(current_el) == MODE_EL3) {
 		tcr |= TCR_EL3_RES1;
-		/* Invalidate all TLBs */
+		/* Invalidate EL3 TLBs */
 		tlbialle3();
 	} else {
 		/* Invalidate EL1 TLBs */
@@ -491,9 +491,6 @@ void disable_mmu(void)
 	write_ttbr0(0);
 	write_sctlr(0);
 
-	/* Invalidate TLBs of the CurrentEL */
-	tlbiall();
-
 	/* Flush the caches */
 	dcsw_op_all(DCCISW);