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Diffstat (limited to 'lib/aarch64/xlat_helpers.c')
| -rw-r--r-- | lib/aarch64/xlat_helpers.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/lib/aarch64/xlat_helpers.c b/lib/aarch64/xlat_helpers.c new file mode 100644 index 0000000..d401ffc --- /dev/null +++ b/lib/aarch64/xlat_helpers.c @@ -0,0 +1,127 @@ +/* + * Copyright (c) 2013-2014, 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 <arch.h> +#include <assert.h> + +/******************************************************************************* + * Helper to create a level 1/2 table descriptor which points to a level 2/3 + * table. + ******************************************************************************/ +unsigned long create_table_desc(unsigned long *next_table_ptr) +{ + unsigned long desc = (unsigned long) next_table_ptr; + + /* Clear the last 12 bits */ + desc >>= FOUR_KB_SHIFT; + desc <<= FOUR_KB_SHIFT; + + desc |= TABLE_DESC; + + return desc; +} + +/******************************************************************************* + * Helper to create a level 1/2/3 block descriptor which maps the va to addr + ******************************************************************************/ +unsigned long create_block_desc(unsigned long desc, + unsigned long addr, + unsigned int level) +{ + switch (level) { + case LEVEL1: + desc |= (addr << FIRST_LEVEL_DESC_N) | BLOCK_DESC; + break; + case LEVEL2: + desc |= (addr << SECOND_LEVEL_DESC_N) | BLOCK_DESC; + break; + case LEVEL3: + desc |= (addr << THIRD_LEVEL_DESC_N) | TABLE_DESC; + break; + default: + assert(0); + } + + return desc; +} + +/******************************************************************************* + * Helper to create a level 1/2/3 block descriptor which maps the va to output_ + * addr with Device nGnRE attributes. + ******************************************************************************/ +unsigned long create_device_block(unsigned long output_addr, + unsigned int level, + unsigned int ns) +{ + unsigned long upper_attrs, lower_attrs, desc; + + lower_attrs = LOWER_ATTRS(ACCESS_FLAG | OSH | AP_RW); + lower_attrs |= LOWER_ATTRS(ns | ATTR_DEVICE_INDEX); + upper_attrs = UPPER_ATTRS(XN); + desc = upper_attrs | lower_attrs; + + return create_block_desc(desc, output_addr, level); +} + +/******************************************************************************* + * Helper to create a level 1/2/3 block descriptor which maps the va to output_ + * addr with inner-shareable normal wbwa read-only memory attributes. + ******************************************************************************/ +unsigned long create_romem_block(unsigned long output_addr, + unsigned int level, + unsigned int ns) +{ + unsigned long upper_attrs, lower_attrs, desc; + + lower_attrs = LOWER_ATTRS(ACCESS_FLAG | ISH | AP_RO); + lower_attrs |= LOWER_ATTRS(ns | ATTR_IWBWA_OWBWA_NTR_INDEX); + upper_attrs = UPPER_ATTRS(0ull); + desc = upper_attrs | lower_attrs; + + return create_block_desc(desc, output_addr, level); +} + +/******************************************************************************* + * Helper to create a level 1/2/3 block descriptor which maps the va to output_ + * addr with inner-shareable normal wbwa read-write memory attributes. + ******************************************************************************/ +unsigned long create_rwmem_block(unsigned long output_addr, + unsigned int level, + unsigned int ns) +{ + unsigned long upper_attrs, lower_attrs, desc; + + lower_attrs = LOWER_ATTRS(ACCESS_FLAG | ISH | AP_RW); + lower_attrs |= LOWER_ATTRS(ns | ATTR_IWBWA_OWBWA_NTR_INDEX); + upper_attrs = UPPER_ATTRS(XN); + desc = upper_attrs | lower_attrs; + + return create_block_desc(desc, output_addr, level); +} |