ae378872c2
Summary: - Currently, CONFIG_ARCH_PGPOOL_MAPPING=y is necessary for CONFIG_BUILD_KERNEL=y. - This commit removes the code for CONFIG_ARCH_PGPOOL_MAPPING=n Impact: - None Testing: - Tested with sabre-6quad:netknsh_smp Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
118 lines
3.7 KiB
C
118 lines
3.7 KiB
C
/****************************************************************************
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* arch/arm/src/armv7-a/arm_physpgaddr.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/addrenv.h>
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#include <nuttx/pgalloc.h>
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#include "chip.h"
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#include "mmu.h"
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#include "pgalloc.h"
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#ifdef CONFIG_MM_PGALLOC
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: arm_physpgaddr
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*
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* Description:
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* Check if the virtual address lies in the user data area and, if so
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* get the mapping to the physical address in the page pool.
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*
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****************************************************************************/
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uintptr_t arm_physpgaddr(uintptr_t vaddr)
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{
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uint32_t *l2table;
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uintptr_t paddr;
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uint32_t l1entry;
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int index;
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/* Check if this address is within the range of one of the virtualized user
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* address regions.
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*/
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if (arm_uservaddr(vaddr))
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{
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/* Yes.. Get Level 1 page table entry corresponding to this virtual
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* address.
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*/
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l1entry = mmu_l1_getentry(vaddr);
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if ((l1entry & PMD_TYPE_MASK) == PMD_TYPE_PTE)
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{
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/* Get the physical address of the level 2 page table from the
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* level 1 page table entry.
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*/
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paddr = ((uintptr_t)l1entry & PMD_PTE_PADDR_MASK);
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/* Get the virtual address of the base of level 2 page table */
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l2table = (uint32_t *)arm_pgvaddr(paddr);
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if (l2table)
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{
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/* Invalidate D-Cache line containing this virtual address so
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* that we re-read from physical memory
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*/
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index = (vaddr & SECTION_MASK) >> MM_PGSHIFT;
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up_invalidate_dcache((uintptr_t)&l2table[index],
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(uintptr_t)&l2table[index] +
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sizeof(uint32_t));
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/* Get the Level 2 page table entry corresponding to this
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* virtual address. Extract the physical address of the page
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* containing the mapping of the virtual address.
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*/
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paddr = ((uintptr_t)l2table[index] & PTE_SMALL_PADDR_MASK);
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/* Add the correct offset and return the physical address
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* corresponding to the virtual address.
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*/
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return paddr + (vaddr & MM_PGMASK);
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}
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}
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}
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/* No mapping available */
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return 0;
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}
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#endif /* CONFIG_MM_PGALLOC */
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