38 lines
752 B
C
38 lines
752 B
C
/*
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2021-01-30 lizhirui first version
|
|
*/
|
|
|
|
#include <rthw.h>
|
|
#include <rtthread.h>
|
|
|
|
#include <stdint.h>
|
|
#include <riscv.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "riscv_mmu.h"
|
|
|
|
void mmu_set_pagetable(rt_ubase_t addr)
|
|
{
|
|
RT_ASSERT(__CHECKALIGN(addr,PAGE_OFFSET_BIT));
|
|
RT_ASSERT(__CHECKUPBOUND(addr,PHYSICAL_ADDRESS_WIDTH_BITS));
|
|
write_csr(satp,(((size_t)8) << 60) | (addr >> PAGE_OFFSET_BIT));
|
|
mmu_flush_tlb();
|
|
}
|
|
|
|
void mmu_enable_user_page_access()
|
|
{
|
|
set_csr(sstatus,SSTATUS_PUM);
|
|
}
|
|
|
|
void mmu_disable_user_page_access()
|
|
{
|
|
clear_csr(sstatus,SSTATUS_PUM);
|
|
}
|