armv8: Add tlb_allocated to arch global data

When secure ram is used, MMU tables have to be put into secure ram.
To use common MMU code, gd->arch.tlb_addr will be used to host TLB
entry pointer. To save allocated memory for later use, tlb_allocated
variable is added to global data structure.

Signed-off-by: York Sun <york.sun@nxp.com>

arch/arm/include/asm/global_data.h

@@ -57,6 +57,7 @@ struct arch_global_data {
 	 *             0x2 maintained
 	 */
 	phys_addr_t secure_ram;
+	unsigned long tlb_allocated;
 #endif
 
 #ifdef CONFIG_OMAP_COMMON

common/board_f.c

@@ -432,6 +432,15 @@ static int reserve_mmu(void)
 	gd->arch.tlb_addr = gd->relocaddr;
 	debug("TLB table from %08lx to %08lx\n", gd->arch.tlb_addr,
 	      gd->arch.tlb_addr + gd->arch.tlb_size);
+
+#ifdef CONFIG_SYS_MEM_RESERVE_SECURE
+	/*
+	 * Record allocated tlb_addr in case gd->tlb_addr to be overwritten
+	 * with location within secure ram.
+	 */
+	gd->arch.tlb_allocated = gd->arch.tlb_addr;
+#endif
+
 	return 0;
 }
 #endif