summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--bl1/bl1.ld.S5
-rw-r--r--bl2/bl2.ld.S5
-rw-r--r--bl2/bl2_el3.ld.S5
-rw-r--r--bl2u/bl2u.ld.S5
-rw-r--r--bl31/aarch64/bl31_entrypoint.S4
-rw-r--r--bl31/bl31.ld.S5
-rw-r--r--bl32/sp_min/sp_min.ld.S5
-rw-r--r--bl32/tsp/tsp.ld.S5
-rw-r--r--include/lib/xlat_tables/xlat_mmu_helpers.h42
-rw-r--r--include/lib/xlat_tables/xlat_tables_defs.h15
-rw-r--r--plat/mediatek/mt6795/bl31.ld.S5
11 files changed, 68 insertions, 33 deletions
diff --git a/bl1/bl1.ld.S b/bl1/bl1.ld.S
index e4c454b3..26c0ae4b 100644
--- a/bl1/bl1.ld.S
+++ b/bl1/bl1.ld.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -129,7 +129,8 @@ SECTIONS
/*
* The xlat_table section is for full, aligned page tables (4K).
* Removing them from .bss avoids forcing 4K alignment on
- * the .bss section and eliminates the unecessary zero init
+ * the .bss section. The tables are initialized to zero by the translation
+ * tables library.
*/
xlat_table (NOLOAD) : {
*(xlat_table)
diff --git a/bl2/bl2.ld.S b/bl2/bl2.ld.S
index 4fe78f9e..69c22eb3 100644
--- a/bl2/bl2.ld.S
+++ b/bl2/bl2.ld.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -108,7 +108,8 @@ SECTIONS
/*
* The xlat_table section is for full, aligned page tables (4K).
* Removing them from .bss avoids forcing 4K alignment on
- * the .bss section and eliminates the unecessary zero init
+ * the .bss section. The tables are initialized to zero by the translation
+ * tables library.
*/
xlat_table (NOLOAD) : {
*(xlat_table)
diff --git a/bl2/bl2_el3.ld.S b/bl2/bl2_el3.ld.S
index 57709e35..3728643c 100644
--- a/bl2/bl2_el3.ld.S
+++ b/bl2/bl2_el3.ld.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -139,7 +139,8 @@ SECTIONS
/*
* The xlat_table section is for full, aligned page tables (4K).
* Removing them from .bss avoids forcing 4K alignment on
- * the .bss section and eliminates the unnecessary zero init
+ * the .bss section. The tables are initialized to zero by the translation
+ * tables library.
*/
xlat_table (NOLOAD) : {
*(xlat_table)
diff --git a/bl2u/bl2u.ld.S b/bl2u/bl2u.ld.S
index da587172..7b97758d 100644
--- a/bl2u/bl2u.ld.S
+++ b/bl2u/bl2u.ld.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -95,7 +95,8 @@ SECTIONS
/*
* The xlat_table section is for full, aligned page tables (4K).
* Removing them from .bss avoids forcing 4K alignment on
- * the .bss section and eliminates the unecessary zero init
+ * the .bss section. The tables are initialized to zero by the translation
+ * tables library.
*/
xlat_table (NOLOAD) : {
*(xlat_table)
diff --git a/bl31/aarch64/bl31_entrypoint.S b/bl31/aarch64/bl31_entrypoint.S
index 419927d8..e7d94b50 100644
--- a/bl31/aarch64/bl31_entrypoint.S
+++ b/bl31/aarch64/bl31_entrypoint.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -9,7 +9,7 @@
#include <el3_common_macros.S>
#include <pmf_asm_macros.S>
#include <runtime_instr.h>
-#include <xlat_tables_defs.h>
+#include <xlat_mmu_helpers.h>
.globl bl31_entrypoint
.globl bl31_warm_entrypoint
diff --git a/bl31/bl31.ld.S b/bl31/bl31.ld.S
index dd046c43..c6a4fe49 100644
--- a/bl31/bl31.ld.S
+++ b/bl31/bl31.ld.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -217,7 +217,8 @@ SECTIONS
/*
* The xlat_table section is for full, aligned page tables (4K).
* Removing them from .bss avoids forcing 4K alignment on
- * the .bss section and eliminates the unecessary zero init
+ * the .bss section. The tables are initialized to zero by the translation
+ * tables library.
*/
xlat_table (NOLOAD) : {
#if ENABLE_SPM
diff --git a/bl32/sp_min/sp_min.ld.S b/bl32/sp_min/sp_min.ld.S
index e798a0d3..71de8839 100644
--- a/bl32/sp_min/sp_min.ld.S
+++ b/bl32/sp_min/sp_min.ld.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -176,7 +176,8 @@ SECTIONS
/*
* The xlat_table section is for full, aligned page tables (4K).
* Removing them from .bss avoids forcing 4K alignment on
- * the .bss section and eliminates the unecessary zero init
+ * the .bss section. The tables are initialized to zero by the translation
+ * tables library.
*/
xlat_table (NOLOAD) : {
*(xlat_table)
diff --git a/bl32/tsp/tsp.ld.S b/bl32/tsp/tsp.ld.S
index d256b46c..31c5a67e 100644
--- a/bl32/tsp/tsp.ld.S
+++ b/bl32/tsp/tsp.ld.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -94,7 +94,8 @@ SECTIONS
/*
* The xlat_table section is for full, aligned page tables (4K).
* Removing them from .bss avoids forcing 4K alignment on
- * the .bss section and eliminates the unecessary zero init
+ * the .bss section. The tables are initialized to zero by the translation
+ * tables library.
*/
xlat_table (NOLOAD) : {
*(xlat_table)
diff --git a/include/lib/xlat_tables/xlat_mmu_helpers.h b/include/lib/xlat_tables/xlat_mmu_helpers.h
index fd3efc3f..d83d7640 100644
--- a/include/lib/xlat_tables/xlat_mmu_helpers.h
+++ b/include/lib/xlat_tables/xlat_mmu_helpers.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -7,13 +7,51 @@
#ifndef __XLAT_MMU_HELPERS_H__
#define __XLAT_MMU_HELPERS_H__
+/*
+ * The following flags are passed to enable_mmu_xxx() to override the default
+ * values used to program system registers while enabling the MMU.
+ */
+
+/*
+ * When this flag is used, all data access to Normal memory from this EL and all
+ * Normal memory accesses to the translation tables of this EL are non-cacheable
+ * for all levels of data and unified cache until the caches are enabled by
+ * setting the bit SCTLR_ELx.C.
+ */
+#define DISABLE_DCACHE (U(1) << 0)
+
+/*
+ * Mark the translation tables as non-cacheable for the MMU table walker, which
+ * is a different observer from the PE/CPU. If the flag is not specified, the
+ * tables are cacheable for the MMU table walker.
+ *
+ * Note that, as far as the PE/CPU observer is concerned, the attributes used
+ * are the ones specified in the translation tables themselves. The MAIR
+ * register specifies the cacheability through the field AttrIndx of the lower
+ * attributes of the translation tables. The shareability is specified in the SH
+ * field of the lower attributes.
+ *
+ * The MMU table walker uses the attributes specified in the fields ORGNn, IRGNn
+ * and SHn of the TCR register to access the translation tables.
+ *
+ * The attributes specified in the TCR register and the tables can be different
+ * as there are no checks to prevent that. Special care must be taken to ensure
+ * that there aren't mismatches. The behaviour in that case is described in the
+ * sections 'Mismatched memory attributes' in the ARMv8 ARM.
+ */
+#define XLAT_TABLE_NC (U(1) << 1)
+
+#ifndef __ASSEMBLY__
+
#ifdef AARCH32
/* AArch32 specific translation table API */
-void enable_mmu_secure(uint32_t flags);
+void enable_mmu_secure(unsigned int flags);
#else
/* AArch64 specific translation table APIs */
void enable_mmu_el1(unsigned int flags);
void enable_mmu_el3(unsigned int flags);
#endif /* AARCH32 */
+#endif /* __ASSEMBLY__ */
+
#endif /* __XLAT_MMU_HELPERS_H__ */
diff --git a/include/lib/xlat_tables/xlat_tables_defs.h b/include/lib/xlat_tables/xlat_tables_defs.h
index 3a7f2456..1c84fe07 100644
--- a/include/lib/xlat_tables/xlat_tables_defs.h
+++ b/include/lib/xlat_tables/xlat_tables_defs.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -9,6 +9,7 @@
#include <arch.h>
#include <utils_def.h>
+#include <xlat_mmu_helpers.h>
/* Miscellaneous MMU related constants */
#define NUM_2MB_IN_GB (U(1) << 9)
@@ -165,16 +166,4 @@
#define XN_SHIFT 54
#define UXN_SHIFT XN_SHIFT
-/*
- * Flags to override default values used to program system registers while
- * enabling the MMU.
- */
-#define DISABLE_DCACHE (U(1) << 0)
-
-/*
- * This flag marks the translation tables are Non-cacheable for MMU accesses.
- * If the flag is not specified, by default the tables are cacheable.
- */
-#define XLAT_TABLE_NC (U(1) << 1)
-
#endif /* __XLAT_TABLES_DEFS_H__ */
diff --git a/plat/mediatek/mt6795/bl31.ld.S b/plat/mediatek/mt6795/bl31.ld.S
index eacb1b27..0fbd3f78 100644
--- a/plat/mediatek/mt6795/bl31.ld.S
+++ b/plat/mediatek/mt6795/bl31.ld.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -132,7 +132,8 @@ SECTIONS
/*
* The xlat_table section is for full, aligned page tables (4K).
* Removing them from .bss avoids forcing 4K alignment on
- * the .bss section and eliminates the unecessary zero init
+ * the .bss section. The tables are initialized to zero by the translation
+ * tables library.
*/
xlat_table (NOLOAD) : {
*(xlat_table)
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-01 19:56:48 +0000