怎么解决rt-smart在适配riscv64虚拟地址和物理地址映射问题？

在bl808适配RT-THREAD master分支上的rt-smart过程中，遇到了虚拟地址和物理地址映射问题，寻求熟悉rt-smart的大佬帮助

BL808使用的是平头哥C906的RISC-V内核

1、当前在未开启RT_USING_SMART宏情况下，系统可以在物理地址上正常运行，任务切换正常。

内存物理地址：0x50000000，大小64MByte
链接地址：0x50000000
PLIC物理地址：0xe0000000

在启动的时候，boot负责将rtthread这部分代码搬移到内存0x50000000。

2、在bsp下开启RT_USING_SMART选项，参考allwinner/d1s下的配置，

（1）修改配置rtconfig.h为

#define KERNEL_VADDR_START 0x50000000
#define PV_OFFSET 0x0
（2）在rt_hw_board_init函数中添加

#ifdef RT_USING_SMART
rt_hw_mmu_map_init(&rt_kernel_space, (void *)(USER_VADDR_START - IOREMAP_SIZE), IOREMAP_SIZE, (rt_size_t *)MMUTable, 0);
rt_page_init(init_page_region);
rt_hw_mmu_setup(&rt_kernel_space, platform_mem_desc, NUM_MEM_DESC);
#endif
struct mem_desc platform_mem_desc[] = {
{KERNEL_VADDR_START, KERNEL_VADDR_START + 0x4000000 - 1, KERNEL_VADDR_START + PV_OFFSET, NORMAL_MEM},
{0x1000, 0x4ffff000 - 1, 0x1000 + PV_OFFSET, DEVICE_MEM},
};

基于以上配置的情况下，RT-SMART宏开启后，写plic之后就会发生异常，

Unhandled Exception 7:Store/AMO Access Fault
scause:0x0000000000000007,stval:0x0000000010201000,sepc:0x00000000500248b4
--------------Dump Registers-----------------
Function Registers:
ra(x1) = 0x0000000050024cca user_sp = 0x000000005003f840
gp(x3) = 0x000000005003c0a0 tp(x4) = 0x0000000000000000
Temporary Registers:
t0(x5) = 0x0000000000004000 t1(x6) = 0x0000000000000000
t2(x7) = 0x0000000000000001
t3(x28) = 0x0000000000000000 t4(x29) = 0x0000000000000000
t5(x30) = 0x0000000000000000 t6(x31) = 0x0000000000000000
Saved Registers:
s0/fp(x8) = 0x000000005003f860 s1(x9) = 0x0000000000000000
s2(x18) = 0x0000000000000000 s3(x19) = 0x0000000000000000
s4(x20) = 0x0000000000000000 s5(x21) = 0x0000000000000000
s6(x22) = 0x0000000000000000 s7(x23) = 0x0000000000000000
s8(x24) = 0x0000000000000000 s9(x25) = 0x0000000000000000
s10(x26) = 0x0000000000000000 s11(x27) = 0x0000000000000000
Function Arguments Registers:
a0(x10) = 0x0000000000000000 a1(x11) = 0x0000000010201000
a2(x12) = 0x0000000000000004 a3(x13) = 0x0000000000000080
a4(x14) = 0x0000000000000000 a5(x15) = 0x0000000010201000
a6(x16) = 0xfefefefefefefeff a7(x17) = 0x0000000000000007
sstatus = 0x0000000200040100
Supervisor Interrupt Disabled
Last Time Supervisor Interrupt Disabled
Last Privilege is Supervisor Mode
Permit to Access User Page
Not Permit to Read Executable-only Page
satp = 0x800000000005006f
Current Page Table(Physical) = 0x000000005006f000
Current ASID = 0x0000000000000000
Mode = Page-based 39-bit Virtual Addressing Mode
-----------------Dump OK---------------------
--------------Thread list--------------
current thread: (NULL)
--------------Backtrace--------------
riscv64-unknown-linux-musl-addr2line -e rtthread.elf -a -f 00000000500248b0

目前关于RT-SMART的资料较少，官网文档中心里面讲的也不是特别详细，想寻求一下大佬支持，谢谢