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b1f3435d22
add support for MM_PGALLOC for x86_64 Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/****************************************************************************
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* arch/x86_64/src/common/pgalloc.h
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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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#ifndef __ARCH_X86_64_SRC_COMMON_PGALLOC_H
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#define __ARCH_X86_64_SRC_COMMON_PGALLOC_H
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#ifdef CONFIG_MM_PGALLOC
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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 <stdint.h>
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#include <string.h>
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#include "addrenv.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: x86_64_pgvaddr
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*
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* Description:
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* Get virtual address for pgpool physical address. Note: this function
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* is minimalistic and is only usable for kernel mappings and only tests
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* if the paddr is in the pgpool. For user mapped addresses this does not
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* work.
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*
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* Input Parameters:
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* paddr - Physical pgpool address
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*
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* Return:
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* vaddr - Virtual address for physical address
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*
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****************************************************************************/
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static inline uintptr_t x86_64_pgvaddr(uintptr_t paddr)
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{
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#ifdef CONFIG_ARCH_PGPOOL_MAPPING
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if (paddr >= CONFIG_ARCH_PGPOOL_PBASE && paddr < CONFIG_ARCH_PGPOOL_PEND)
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{
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return CONFIG_ARCH_PGPOOL_VBASE + paddr - CONFIG_ARCH_PGPOOL_PBASE;
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}
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else
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#endif
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if (paddr >= CONFIG_RAM_START && paddr < CONFIG_RAM_END && paddr != 0)
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{
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return X86_64_LOAD_OFFSET + paddr - CONFIG_RAM_START;
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}
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return 0;
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}
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static inline uintptr_t x86_64_pgpaddr(uintptr_t vaddr)
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{
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#ifdef CONFIG_ARCH_PGPOOL_MAPPING
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if (vaddr >= CONFIG_ARCH_PGPOOL_VBASE && vaddr < CONFIG_ARCH_PGPOOL_VEND)
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{
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return CONFIG_ARCH_PGPOOL_PBASE + vaddr - CONFIG_ARCH_PGPOOL_VBASE;
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}
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else
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#endif
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if (vaddr >= X86_64_LOAD_OFFSET && vaddr < X86_64_LOAD_OFFSET)
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{
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return CONFIG_RAM_START + vaddr - X86_64_LOAD_OFFSET;
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}
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return 0;
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}
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/****************************************************************************
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* Name: x86_64_pgwipe
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*
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* Description:
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* Wipe a page of physical memory, first mapping it into virtual memory.
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*
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* Input Parameters:
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* paddr - Physical address of page
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*
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****************************************************************************/
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static inline void x86_64_pgwipe(uintptr_t paddr)
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{
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uintptr_t vaddr = x86_64_pgvaddr(paddr);
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memset((void *)vaddr, 0, MM_PGSIZE);
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}
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#endif /* CONFIG_MM_PGALLOC */
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#endif /* __ARCH_X86_64_SRC_COMMON_PGALLOC_H */
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