ecf2d82159
* Synchronize the code of the rt mart branch to the master branch.
* TTY device
* Add lwP code from rt-smart
* Add vnode in DFS, but DFS will be re-write for rt-smart
* There are three libcpu for rt-smart:
* arm/cortex-a, arm/aarch64
* riscv64
Co-authored-by: Rbb666 <zhangbingru@rt-thread.com>
Co-authored-by: zhkag <zhkag@foxmail.com>
40 lines
801 B
C
40 lines
801 B
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-01-30 lizhirui first version
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <stdint.h>
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#include <riscv.h>
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#include <string.h>
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#include <stdlib.h>
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#include "riscv_mmu.h"
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void mmu_set_pagetable(rt_ubase_t addr)
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{
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RT_ASSERT(__CHECKALIGN(addr, PAGE_OFFSET_BIT));
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RT_ASSERT(__CHECKUPBOUND(addr, PHYSICAL_ADDRESS_WIDTH_BITS));
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mmu_flush_tlb();
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write_csr(satp, (((size_t)SATP_MODE) << SATP_MODE_OFFSET) | (addr >> PAGE_OFFSET_BIT));
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mmu_flush_tlb();
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}
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void mmu_enable_user_page_access()
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{
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set_csr(sstatus, SSTATUS_SUM);
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}
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void mmu_disable_user_page_access()
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{
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clear_csr(sstatus, SSTATUS_SUM);
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}
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