/*
* Copyright (c) 2015 Petr Pavlu
* 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/** @addtogroup kernel_arm64_mm
* @{
*/
/** @file
* @brief Address space functions.
*/
#include <arch/mm/as.h>
#include <arch/regutils.h>
#include <genarch/mm/asid_fifo.h>
#include <genarch/mm/page_pt.h>
#include <mm/as.h>
#include <mm/asid.h>
/** Architecture dependent address space init.
*
* Since ARM64 supports page tables, #as_pt_operations are used.
*/
void as_arch_init(void)
{
as_operations = &as_pt_operations;
asid_fifo_init();
}
/** Perform ARM64-specific tasks when an address space becomes active on the
* processor.
*
* Change the level 0 page table (this is normally done by
* SET_PTL0_ADDRESS_ARCH() on other architectures) and install ASID.
*
* @param as Address space.
*/
void as_install_arch(as_t *as)
{
uint64_t val;
val = (uint64_t) as->genarch.page_table;
if (as->asid != ASID_KERNEL) {
val |= (uint64_t) as->asid << TTBR0_ASID_SHIFT;
TTBR0_EL1_write(val);
} else
TTBR1_EL1_write(val);
}
/** @}
*/