Web从 mscratch CSR 中读出并写入一个值的示例汇编代码如下: csrr t0, mscratch addi t0, … WebOct 17, 2024 · #define CSR_MTVEC 0x305 #define CSR_MSCRATCH 0x340 ... + csrw sscratch, 0 + +#ifdef CONFIG_FPU + csrr t0, CSR_MISA + andi t0, t0, (COMPAT_HWCAP_ISA_F COMPAT_HWCAP_ISA_D) + bnez t0, .Lreset_regs_done + + li t1, SR_FS + csrs CSR_XSTATUS, t1 + fmv.s.x f0, zero
What is the difference between Mscratch and Mtvec Registers?
WebJul 11, 2024 · 首先明确,真正的机器码只有6条指令:. csrrw (CSR read and write) ,这是读写操作,csr中的值写入rd,rs1的值写入csr。. csrrwi是csrrw的立即数扩展,rs1寄存器保存值变为一个立即数,对csr的操作是一致的。. csrrs (CSR read and set), 这是读并置位操作,csr中的值写入rd, rs1的 ... WebIf the code snippets given below do not contain all of the information required, here is the Github repo. From boot.S (Switching to Supervisor Mode) _start_kinit_return: li t0, (0b1 << 8) (1 << 5) csrw sstatus, t0 la t1, kmain csrw sepc, t1 li t2, (1 << 1) (1 << 5) (1 << 9) csrw mideleg, t2 csrw sie, t2 la t3, asm_trap_vector csrw stvec ... green clean bangor
16 PA3知识总结_HappyGuya的博客-CSDN博客
WebApr 11, 2024 · 批处理系统. 当计算机执行完一条指令的时候, 就自动执行下一条指令. 类似的, 我们能不能让管理员事先准备好一组程序, 让计算机执行完一个程序之后, 就自动执行下一个程序呢? WebApr 11, 2024 · Hi, may I know if there are any more comments regarding the below patch series? Thanks Regards Jee Heng > -----Original Message-----> From: JeeHeng Sia WebThis instruction replaces the csrw instruction we have used before, because csrw is just a special case of csrrw. This instruction is decoded to a new iType of Csrrw. Since csrrw will write two registers, the ExecInst type in ProcTypes.bsv incorporates a new field "Data csrData", which contains the data to be written into csr. green clean auto wash hampton