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/*
* 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);
}
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