forked from xuos/xiuos
69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/*
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* Copyright (c) 2020 AIIT XUOS Lab
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* XiUOS is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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*/
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/**
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* @file sys_mmap.c
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* @brief map task phy address to virt address
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* @version 3.0
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* @author AIIT XUOS Lab
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* @date 2023.08.25
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*/
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/*************************************************
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File name: sys_mmap.c
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Description: map task phy address to virt address
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Others:
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History:
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1. Date: 2023-08-28
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Author: AIIT XUOS Lab
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Modification:
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1. first version
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*************************************************/
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#include <stdint.h>
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#include "assert.h"
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#include "kalloc.h"
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#include "multicores.h"
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#include "share_page.h"
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#include "syscall.h"
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#include "task.h"
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int sys_mmap(uintptr_t vaddr, uintptr_t paddr, int len, int is_dev)
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{
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struct Thread* cur_task = cur_cpu()->task;
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assert(cur_task != NULL);
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int true_len = ALIGNUP(len, PAGE_SIZE);
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if (paddr != (uintptr_t)NULL) {
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if (xizi_share_page_manager.task_map_pages(cur_task, vaddr, paddr, true_len / PAGE_SIZE, is_dev) == (uintptr_t)NULL) {
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return -1;
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}
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} else {
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int load_len = 0;
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uintptr_t load_vaddr = vaddr;
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while (load_len < true_len) {
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char* paddr = raw_alloc(PAGE_SIZE);
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if (paddr == NULL) {
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return -1;
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}
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if (xizi_share_page_manager.task_map_pages(cur_task, load_vaddr, (uintptr_t)paddr, 1, false) == (uintptr_t)NULL) {
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raw_free(paddr);
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return -1;
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}
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load_vaddr += PAGE_SIZE;
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load_len += PAGE_SIZE;
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}
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}
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cur_task->memspace->mem_size += true_len;
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return vaddr + true_len;
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} |