93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
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/****************************************************************************
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* drivers/addrenv.c
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*
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* Copyright (C) 2018 Pinecone Inc. All rights reserved.
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* Author: Guiding Li<liguiding@pinecone.net>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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