[U-Boot] [PATCH 4/9] tegra: Replace home grown mmu code with generic table approach
Alexander Graf
agraf at suse.de
Mon Feb 22 02:57:07 CET 2016
Now that we have nice table driven page table creating code that gives
us everything we need, move to that.
Signed-off-by: Alexander Graf <agraf at suse.de>
---
arch/arm/mach-tegra/Makefile | 1 -
arch/arm/mach-tegra/arm64-mmu.c | 131 --------------------------------------
include/configs/tegra210-common.h | 16 +++++
3 files changed, 16 insertions(+), 132 deletions(-)
delete mode 100644 arch/arm/mach-tegra/arm64-mmu.c
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index b2dbc69..31dd526 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -14,7 +14,6 @@ else
obj-$(CONFIG_CMD_ENTERRCM) += cmd_enterrcm.o
endif
-obj-$(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
deleted file mode 100644
index c227652..0000000
--- a/arch/arm/mach-tegra/arm64-mmu.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * (C) Copyright 2014 - 2015 Xilinx, Inc.
- * Michal Simek <michal.simek at 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));
-}
diff --git a/include/configs/tegra210-common.h b/include/configs/tegra210-common.h
index 8f35a7b..5a664b3 100644
--- a/include/configs/tegra210-common.h
+++ b/include/configs/tegra210-common.h
@@ -13,6 +13,22 @@
/* Cortex-A57 uses a cache line size of 64 bytes */
#define CONFIG_SYS_CACHELINE_SIZE 64
+#define CONFIG_SYS_FULL_VA
+#define CONFIG_SYS_MEM_MAP { \
+ { \
+ .base = 0x0UL, \
+ .size = 0x80000000UL, \
+ .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | \
+ PTE_BLOCK_NON_SHARE | \
+ PTE_BLOCK_PXN | PTE_BLOCK_UXN \
+ }, { \
+ .base = 0x80000000UL, \
+ .size = 0xff80000000UL, \
+ .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | \
+ PTE_BLOCK_INNER_SHARE \
+ }, \
+ }
+
/*
* NS16550 Configuration
*/
--
1.8.5.6
More information about the U-Boot
mailing list