synquacer: Enable MMU using xlat_tables_v2 library

BL31 runs from SRAM which is a non-coherent memory on synquacer. So
enable MMU with SRAM memory marked as Non-Cacheable and mark page tables
kept on SRAM as Non-Cacheable via XLAT_TABLE_NC flag. Also add page tables
for Device address space.
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>

plat/socionext/synquacer/include/platform_def.h

@@ -18,6 +18,11 @@
 #define CACHE_WRITEBACK_SHIFT		6
 #define CACHE_WRITEBACK_GRANULE		(1 << CACHE_WRITEBACK_SHIFT)
 
+#define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 32)
+#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 32)
+#define MAX_XLAT_TABLES			4
+#define MAX_MMAP_REGIONS		6
+
 #define PLATFORM_STACK_SIZE		0x400
 
 #define BL31_BASE			0x04000000

plat/socionext/synquacer/include/sq_common.h

@@ -8,6 +8,7 @@
 #define __SQ_COMMON_H__
 
 #include <sys/types.h>
+#include <xlat_tables_v2.h>
 
 void plat_sq_interconnect_init(void);
 void plat_sq_interconnect_enter_coherency(void);
@@ -21,4 +22,7 @@ void sq_gic_cpuif_enable(void);
 void sq_gic_cpuif_disable(void);
 void sq_gic_pcpu_init(void);
 
+void sq_mmap_setup(uintptr_t total_base, size_t total_size,
+		   const struct mmap_region *mmap);
+
 #endif /* __SQ_COMMON_H__ */

plat/socionext/synquacer/sq_bl31_setup.c

@@ -133,6 +133,13 @@ void bl31_plat_runtime_setup(void)
 
 void bl31_plat_arch_setup(void)
 {
+	sq_mmap_setup(BL31_BASE, BL31_SIZE, NULL);
+	enable_mmu_el3(XLAT_TABLE_NC);
+}
+
+void bl31_plat_enable_mmu(uint32_t flags)
+{
+	enable_mmu_el3(flags | XLAT_TABLE_NC);
 }
 
 unsigned int plat_get_syscnt_freq2(void)

plat/socionext/synquacer/sq_xlat_setup.c

+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <debug.h>
+#include <platform_def.h>
+#include <xlat_tables_v2.h>
+
+#define SQ_REG_REGION_BASE	0x20000000ULL
+#define SQ_REG_REGION_SIZE	0x60000000ULL
+
+void sq_mmap_setup(uintptr_t total_base, size_t total_size,
+			 const struct mmap_region *mmap)
+{
+	VERBOSE("Trusted RAM seen by this BL image: %p - %p\n",
+		(void *)total_base, (void *)(total_base + total_size));
+	mmap_add_region(total_base, total_base,
+			total_size,
+			MT_NON_CACHEABLE | MT_RW | MT_SECURE);
+
+	/* remap the code section */
+	VERBOSE("Code region: %p - %p\n",
+		(void *)BL_CODE_BASE, (void *)BL_CODE_END);
+	mmap_add_region(BL_CODE_BASE, BL_CODE_BASE,
+			round_up(BL_CODE_END, PAGE_SIZE) - BL_CODE_BASE,
+			MT_NON_CACHEABLE | MT_RO | MT_SECURE);
+
+	/* Re-map the read-only data section */
+	VERBOSE("Read-only data region: %p - %p\n",
+		(void *)BL_RO_DATA_BASE, (void *)BL_RO_DATA_END);
+	mmap_add_region(BL_RO_DATA_BASE, BL_RO_DATA_BASE,
+			round_up(BL_RO_DATA_END, PAGE_SIZE) - BL_RO_DATA_BASE,
+			(MT_NON_CACHEABLE | MT_RO | MT_EXECUTE_NEVER |
+			 MT_SECURE));
+
+	/* remap the coherent memory region */
+	VERBOSE("Coherent region: %p - %p\n",
+		(void *)BL_COHERENT_RAM_BASE, (void *)BL_COHERENT_RAM_END);
+	mmap_add_region(BL_COHERENT_RAM_BASE, BL_COHERENT_RAM_BASE,
+			BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE,
+			MT_DEVICE | MT_RW | MT_SECURE);
+
+	/* register region */
+	mmap_add_region(SQ_REG_REGION_BASE, SQ_REG_REGION_BASE,
+			SQ_REG_REGION_SIZE,
+			MT_DEVICE | MT_RW | MT_SECURE);
+
+	/* additional regions if needed */
+	if (mmap)
+		mmap_add(mmap);
+
+	init_xlat_tables();
+}