Merge branch 'master' of git://git.denx.de/u-boot-arm

2 files changed, 132 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 75924ad848..98431a91f8 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_CMD_ENTERRCM) += cmd_enterrcm.o
 obj-$(CONFIG_PWM_TEGRA) += pwm.o
 endif
 
+obj-$(CONFIG_ARM64) += arm64-mmu.o
 obj-y += ap.o
 obj-y += board.o board2.o
 obj-y += cache.o
diff --git a/arch/arm/mach-tegra/arm64-mmu.c b/arch/arm/mach-tegra/arm64-mmu.c
new file mode 100644
index 0000000000..c2276523cb
--- /dev/null
+++ b/arch/arm/mach-tegra/arm64-mmu.c
@@ -0,0 +1,131 @@
+/*
+ * (C) Copyright 2014 - 2015 Xilinx, Inc.
+ * Michal Simek <michal.simek@xilinx.com>
+ * (This file derived from arch/arm/cpu/armv8/zynqmp/cpu.c)
+ *
+ * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/system.h>
+#include <asm/armv8/mmu.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define SECTION_SHIFT_L1	30UL
+#define SECTION_SHIFT_L2	21UL
+#define BLOCK_SIZE_L0		0x8000000000UL
+#define BLOCK_SIZE_L1		(1 << SECTION_SHIFT_L1)
+#define BLOCK_SIZE_L2		(1 << SECTION_SHIFT_L2)
+
+#define TCR_TG1_4K		(1 << 31)
+#define TCR_EPD1_DISABLE	(1 << 23)
+#define TEGRA_VA_BITS		40
+#define TEGRA_TCR		TCR_TG1_4K | \
+				TCR_EPD1_DISABLE | \
+				TCR_SHARED_OUTER | \
+				TCR_SHARED_INNER | \
+				TCR_IRGN_WBWA | \
+				TCR_ORGN_WBWA | \
+				TCR_T0SZ(TEGRA_VA_BITS)
+
+#define MEMORY_ATTR	PMD_SECT_AF | PMD_SECT_INNER_SHARE |	\
+			PMD_ATTRINDX(MT_NORMAL) |	\
+			PMD_TYPE_SECT
+#define DEVICE_ATTR	PMD_SECT_AF | PMD_SECT_PXN |	\
+			PMD_SECT_UXN | PMD_ATTRINDX(MT_DEVICE_NGNRNE) |	\
+			PMD_TYPE_SECT
+
+/* 4K size is required to place 512 entries in each level */
+#define TLB_TABLE_SIZE	0x1000
+
+/*
+ * This mmu table looks as below
+ * Level 0 table contains two entries to 512GB sizes. One is Level1 Table 0
+ * and other Level1 Table1.
+ * Level1 Table0 contains entries for each 1GB from 0 to 511GB.
+ * Level1 Table1 contains entries for each 1GB from 512GB to 1TB.
+ * Level2 Table0, Level2 Table1, Level2 Table2 and Level2 Table3 contains
+ * entries for each 2MB starting from 0GB, 1GB, 2GB and 3GB respectively.
+ */
+void mmu_setup(void)
+{
+	int el;
+	u64 i, section_l1t0, section_l1t1;
+	u64 section_l2t0, section_l2t1, section_l2t2, section_l2t3;
+	u64 *level0_table = (u64 *)gd->arch.tlb_addr;
+	u64 *level1_table_0 = (u64 *)(gd->arch.tlb_addr + TLB_TABLE_SIZE);
+	u64 *level1_table_1 = (u64 *)(gd->arch.tlb_addr + (2 * TLB_TABLE_SIZE));
+	u64 *level2_table_0 = (u64 *)(gd->arch.tlb_addr + (3 * TLB_TABLE_SIZE));
+	u64 *level2_table_1 = (u64 *)(gd->arch.tlb_addr + (4 * TLB_TABLE_SIZE));
+	u64 *level2_table_2 = (u64 *)(gd->arch.tlb_addr + (5 * TLB_TABLE_SIZE));
+	u64 *level2_table_3 = (u64 *)(gd->arch.tlb_addr + (6 * TLB_TABLE_SIZE));
+
+	/* Invalidate all table entries */
+	memset(level0_table, 0, PGTABLE_SIZE);
+
+	level0_table[0] =
+		(u64)level1_table_0 | PMD_TYPE_TABLE;
+	level0_table[1] =
+		(u64)level1_table_1 | PMD_TYPE_TABLE;
+
+	/*
+	 * set level 1 table 0, covering 0 to 512GB
+	 * set level 1 table 1, covering 512GB to 1TB
+	 */
+	section_l1t0 = 0;
+	section_l1t1 = BLOCK_SIZE_L0;
+
+	for (i = 0; i < 512; i++) {
+		level1_table_0[i] = section_l1t0;
+		if (i >= 4)
+			level1_table_0[i] |= MEMORY_ATTR;
+		level1_table_1[i] = section_l1t1;
+		level1_table_1[i] |= MEMORY_ATTR;
+		section_l1t0 += BLOCK_SIZE_L1;
+		section_l1t1 += BLOCK_SIZE_L1;
+	}
+
+	level1_table_0[0] =
+		(u64)level2_table_0 | PMD_TYPE_TABLE;
+	level1_table_0[1] =
+		(u64)level2_table_1 | PMD_TYPE_TABLE;
+	level1_table_0[2] =
+		(u64)level2_table_2 | PMD_TYPE_TABLE;
+	level1_table_0[3] =
+		(u64)level2_table_3 | PMD_TYPE_TABLE;
+
+	section_l2t0 = 0;
+	section_l2t1 = section_l2t0 + BLOCK_SIZE_L1; /* 1GB */
+	section_l2t2 = section_l2t1 + BLOCK_SIZE_L1; /* 2GB */
+	section_l2t3 = section_l2t2 + BLOCK_SIZE_L1; /* 3GB */
+
+	for (i = 0; i < 512; i++) {
+		level2_table_0[i] = section_l2t0 | DEVICE_ATTR;
+		level2_table_1[i] = section_l2t1 | DEVICE_ATTR;
+		level2_table_2[i] = section_l2t2 | MEMORY_ATTR;
+		level2_table_3[i] = section_l2t3 | MEMORY_ATTR;
+		section_l2t0 += BLOCK_SIZE_L2;
+		section_l2t1 += BLOCK_SIZE_L2;
+		section_l2t2 += BLOCK_SIZE_L2;
+		section_l2t3 += BLOCK_SIZE_L2;
+	}
+
+	/* flush new MMU table */
+	flush_dcache_range(gd->arch.tlb_addr,
+			   gd->arch.tlb_addr + gd->arch.tlb_size);
+
+	/* point TTBR to the new table */
+	el = current_el();
+	set_ttbr_tcr_mair(el, gd->arch.tlb_addr,
+			  TEGRA_TCR, MEMORY_ATTRIBUTES);
+
+	set_sctlr(get_sctlr() | CR_M);
+}
+
+u64 *arch_get_page_table(void)
+{
+	return (u64 *)(gd->arch.tlb_addr + (3 * TLB_TABLE_SIZE));
+}