Add enable mmu platform porting interfaces
Previously, the enable_mmu_elX() functions were implicitly part of
the platform porting layer since they were included by generic
code. These functions have been placed behind 2 new platform
functions, bl31_plat_enable_mmu() and bl32_plat_enable_mmu().
These are weakly defined so that they can be optionally overridden
by platform ports.
Also, the enable_mmu_elX() functions have been moved to
lib/aarch64/xlat_tables.c for optional re-use by platform ports.
These functions are tightly coupled with the translation table
initialization code.
Fixes ARM-software/tf-issues#152
Change-Id: I0a2251ce76acfa3c27541f832a9efaa49135cc1c
diff --git a/plat/common/aarch64/plat_common.c b/plat/common/aarch64/plat_common.c
new file mode 100644
index 0000000..2abf29d
--- /dev/null
+++ b/plat/common/aarch64/plat_common.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <xlat_tables.h>
+
+/*
+ * The following 2 platform setup functions are weakly defined. They
+ * provide typical implementations that may be re-used by multiple
+ * platforms but may also be overridden by a platform if required.
+ */
+#pragma weak bl31_plat_enable_mmu
+#pragma weak bl32_plat_enable_mmu
+
+void bl31_plat_enable_mmu()
+{
+ enable_mmu_el3();
+}
+
+void bl32_plat_enable_mmu()
+{
+ enable_mmu_el1();
+}
diff --git a/plat/fvp/aarch64/fvp_common.c b/plat/fvp/aarch64/fvp_common.c
index acfb752..3a07844 100644
--- a/plat/fvp/aarch64/fvp_common.c
+++ b/plat/fvp/aarch64/fvp_common.c
@@ -48,65 +48,6 @@
******************************************************************************/
static unsigned long fvp_config[CONFIG_LIMIT];
-/*******************************************************************************
- * Macro generating the code for the function enabling the MMU in the given
- * exception level, assuming that the pagetables have already been created.
- *
- * _el: Exception level at which the function will run
- * _tcr_extra: Extra bits to set in the TCR register. This mask will
- * be OR'ed with the default TCR value.
- * _tlbi_fct: Function to invalidate the TLBs at the current
- * exception level
- ******************************************************************************/
-#define DEFINE_ENABLE_MMU_EL(_el, _tcr_extra, _tlbi_fct) \
- void enable_mmu_el##_el(void) \
- { \
- uint64_t mair, tcr, ttbr; \
- uint32_t sctlr; \
- \
- assert(IS_IN_EL(_el)); \
- assert((read_sctlr_el##_el() & SCTLR_M_BIT) == 0); \
- \
- /* Set attributes in the right indices of the MAIR */ \
- mair = MAIR_ATTR_SET(ATTR_DEVICE, ATTR_DEVICE_INDEX); \
- mair |= MAIR_ATTR_SET(ATTR_IWBWA_OWBWA_NTR, \
- ATTR_IWBWA_OWBWA_NTR_INDEX); \
- write_mair_el##_el(mair); \
- \
- /* Invalidate TLBs at the current exception level */ \
- _tlbi_fct(); \
- \
- /* Set TCR bits as well. */ \
- /* Inner & outer WBWA & shareable + T0SZ = 32 */ \
- tcr = TCR_SH_INNER_SHAREABLE | TCR_RGN_OUTER_WBA | \
- TCR_RGN_INNER_WBA | TCR_T0SZ_4GB; \
- tcr |= _tcr_extra; \
- write_tcr_el##_el(tcr); \
- \
- /* Set TTBR bits as well */ \
- ttbr = (uint64_t) l1_xlation_table; \
- write_ttbr0_el##_el(ttbr); \
- \
- /* Ensure all translation table writes have drained */ \
- /* into memory, the TLB invalidation is complete, */ \
- /* and translation register writes are committed */ \
- /* before enabling the MMU */ \
- dsb(); \
- isb(); \
- \
- sctlr = read_sctlr_el##_el(); \
- sctlr |= SCTLR_WXN_BIT | SCTLR_M_BIT | SCTLR_I_BIT; \
- sctlr |= SCTLR_A_BIT | SCTLR_C_BIT; \
- write_sctlr_el##_el(sctlr); \
- \
- /* Ensure the MMU enable takes effect immediately */ \
- isb(); \
- }
-
-/* Define EL1 and EL3 variants of the function enabling the MMU */
-DEFINE_ENABLE_MMU_EL(1, 0, tlbivmalle1)
-DEFINE_ENABLE_MMU_EL(3, TCR_EL3_RES1, tlbialle3)
-
/*
* Table of regions to map using the MMU.
* This doesn't include TZRAM as the 'mem_layout' argument passed to
diff --git a/plat/fvp/platform.mk b/plat/fvp/platform.mk
index 105cdfa..4cc4d1e 100644
--- a/plat/fvp/platform.mk
+++ b/plat/fvp/platform.mk
@@ -55,6 +55,7 @@
lib/aarch64/xlat_tables.c \
lib/semihosting/semihosting.c \
lib/semihosting/aarch64/semihosting_call.S \
+ plat/common/aarch64/plat_common.c \
plat/fvp/fvp_io_storage.c
BL1_SOURCES += drivers/arm/cci400/cci400.c \