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These changes are designed to standardize the memory management across 'virt64' and 'c906', ensuring efficient handling of address spaces and page tables. Changes: - Creation of ASID management files (`asid.c`) for both 'c906' and 'virt64' architectures, which is essential for maintaining stability. - Extensive updates to the MMU configuration and handling in `mmu.c` and `mmu.h` files. - Addition of functions to manage ASID allocation and switching of page tables. - For c906, accommodated the early memory setup to the one from virt64. Signed-off-by: Shell <smokewood@qq.com>
30 lines
511 B
C
30 lines
511 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_enable_user_page_access(void)
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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(void)
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{
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clear_csr(sstatus, SSTATUS_SUM);
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}
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