armv8: mmu: house cleaning

Make setup_pgtages() and get_tcr() available for platform code to
customize MMU tables.
Remove unintentional call of create_table().

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

arch/arm/cpu/armv8/cache_v8.c

@@ -35,7 +35,7 @@ DECLARE_GLOBAL_DATA_PTR;
  *    off:          FFF
  */
 
-static u64 get_tcr(int el, u64 *pips, u64 *pva_bits)
+u64 get_tcr(int el, u64 *pips, u64 *pva_bits)
 {
 	u64 max_addr = 0;
 	u64 ips, va_bits;
@@ -349,10 +349,13 @@ __weak u64 get_page_table_size(void)
 	return size;
 }
 
-static void setup_pgtables(void)
+void setup_pgtables(void)
 {
 	int i;
 
+	if (!gd->arch.tlb_fillptr || !gd->arch.tlb_addr)
+		panic("Page table pointer not setup.");
+
 	/*
 	 * Allocate the first level we're on with invalidate entries.
 	 * If the starting level is 0 (va_bits >= 39), then this is our
@@ -363,9 +366,6 @@ static void setup_pgtables(void)
 	/* Now add all MMU table entries one after another to the table */
 	for (i = 0; mem_map[i].size || mem_map[i].attrs; i++)
 		add_map(&mem_map[i]);
-
-	/* Create the same thing once more for our emergency page table */
-	create_table();
 }
 
 static void setup_all_pgtables(void)
@@ -527,6 +527,9 @@ void mmu_set_region_dcache_behaviour(phys_addr_t start, size_t size,
 
 	debug("start=%lx size=%lx\n", (ulong)start, (ulong)size);
 
+	if (!gd->arch.tlb_emerg)
+		panic("Emergency page table not setup.");
+
 	/*
 	 * We can not modify page tables that we're currently running on,
 	 * so we first need to switch to the "emergency" page tables where

arch/arm/include/asm/armv8/mmu.h

@@ -141,6 +141,8 @@ struct mm_region {
 };
 
 extern struct mm_region *mem_map;
+void setup_pgtables(void);
+u64 get_tcr(int el, u64 *pips, u64 *pva_bits);
 #endif
 
 #endif /* _ASM_ARMV8_MMU_H_ */