songyanguang
87 lines
2.0 KiB
C
87 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 bootmmu.c
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* @brief build pagetable and enable mmu in boot time
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* @version 1.0
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* @author AIIT XUOS Lab
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* @date 2024.04.26
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*/
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/*************************************************
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File name: bootmmu.c
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Description: build pagetable and enable mmu in boot time
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Others:
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History:
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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 "core.h"
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#include "memlayout.h"
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#include "mmio_access.h"
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#include "mmu.h"
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#include "pagetable.h"
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#include "registers.h"
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#include "ns16550.h"
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#include "printf.h"
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#include <asm/csr.h>
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#include <asm/pgtable-bits.h>
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#include <stdint.h>
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#include <string.h>
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//
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#if 0
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static int test_access_map_address(void)
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{
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unsigned long address = KERN_MEM_BASE + (PHY_USER_FREEMEM_BASE - PHY_MEM_BASE) - 4096;
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printf_early("to access 0x%lx\n", address);
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*(unsigned long *)address = 0x55;
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if(*(unsigned long *)address == 0x55) {
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printf_early("access 0x%lx done\n", address);
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}
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return 0;
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}
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static int test_access_unmap_address(void)
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{
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unsigned long address = KERN_MEM_BASE + (PHY_USER_FREEMEM_BASE - PHY_MEM_BASE) + 4096;
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*(unsigned long *)address = 0x55;
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printf_early("access 0x%lx done\n", address);
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return 0;
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}
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static void test_mmu(void)
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{
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test_access_map_address();
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test_access_unmap_address();
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}
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#endif
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//
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extern void main(void);
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void bootmain(void)
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{
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_debug_uart_printascii("bootmain start\n");
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#if 0
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test_mmu();
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#endif
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main();
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_debug_uart_printascii("bootmain end\n");
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while(1);
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}
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