113 lines
3.4 KiB
C
113 lines
3.4 KiB
C
/****************************************************************************
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* drivers/misc/addrenv.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 <nuttx/list.h>
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#include <nuttx/kmalloc.h>
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#include <string.h>
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#include <nuttx/drivers/addrenv.h>
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct simple_addrenv_node_s
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{
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struct list_node node;
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FAR const struct simple_addrenv_s *addrenv;
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static struct list_node g_addrenv_list = LIST_INITIAL_VALUE(g_addrenv_list);
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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void simple_addrenv_initialize(FAR const struct simple_addrenv_s *addrenv)
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{
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FAR struct simple_addrenv_node_s *node;
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if (addrenv != NULL)
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{
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node = kmm_malloc(sizeof(*node));
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if (node != NULL)
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{
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node->addrenv = addrenv;
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list_add_tail(&g_addrenv_list, &node->node);
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}
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}
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}
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FAR void *up_addrenv_pa_to_va(uintptr_t pa)
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{
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FAR struct simple_addrenv_node_s *node;
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FAR const struct simple_addrenv_s *addrenv;
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uint32_t i;
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list_for_every_entry(&g_addrenv_list, node,
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struct simple_addrenv_node_s, node)
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{
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addrenv = node->addrenv;
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for (i = 0; addrenv[i].size; i++)
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{
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if (pa - addrenv[i].pa < addrenv[i].size)
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{
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return (FAR void *)(addrenv[i].va + pa - addrenv[i].pa);
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}
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}
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}
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return (FAR void *)pa;
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}
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uintptr_t up_addrenv_va_to_pa(FAR void *va_)
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{
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FAR struct simple_addrenv_node_s *node;
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FAR const struct simple_addrenv_s *addrenv;
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uintptr_t va = (uintptr_t)va_;
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uint32_t i;
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list_for_every_entry(&g_addrenv_list, node,
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struct simple_addrenv_node_s, node)
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{
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addrenv = node->addrenv;
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for (i = 0; addrenv[i].size; i++)
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{
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uintptr_t tmp = addrenv[i].va;
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if (va - tmp < addrenv[i].size)
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{
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return addrenv[i].pa + (va - tmp);
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}
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}
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}
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return va;
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}
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