78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/****************************************************************************
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* drivers/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 <string.h>
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#include <nuttx/drivers/addrenv.h>
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const struct simple_addrenv_s g_addrenv_dummy;
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static const struct simple_addrenv_s *g_addrenv = &g_addrenv_dummy;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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void simple_addrenv_initialize(const struct simple_addrenv_s *addrenv)
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{
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g_addrenv = addrenv;
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}
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void *up_addrenv_pa_to_va(uintptr_t pa)
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{
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uint32_t i;
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for (i = 0; g_addrenv[i].size; i++)
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{
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if (pa - g_addrenv[i].pa < g_addrenv[i].size)
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{
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return (void *)(g_addrenv[i].va + B2C(pa - g_addrenv[i].pa));
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}
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}
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return (void *)B2C(pa);
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}
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uintptr_t up_addrenv_va_to_pa(void *va_)
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{
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uintptr_t va = C2B((uintptr_t)va_);
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uint32_t i;
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for (i = 0; g_addrenv[i].size; i++)
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{
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uintptr_t tmp = C2B(g_addrenv[i].va);
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if (va - tmp < g_addrenv[i].size)
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{
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return g_addrenv[i].pa + (va - tmp);
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}
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}
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return va;
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}
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