Weba simple bootloader, run on spike. Contribute to eric-xtang1008/boot-wrapper-riscv64 development by creating an account on GitHub. WebLhandle_trap_in_machine_mode restore_mscratch: # Restore mscratch, so future traps will know they didn't come from M-mode. csrw mscratch, sp restore_regs: # Restore all of the registers. LOAD ra, 1*REGBYTES(sp) // 途中略 LOAD sp, 2*REGBYTES(sp) mret // ここでMachine-modeから抜ける
riscv_start.s · GitHub
WebMar 10, 2024 · csrr a0, mepc csrr a1, mtval csrr a2, mcause csrr a3, mhartid csrr a4, mstatus csrr a5, mscratch la t0, KERNEL_STACK_END ld sp, 0(t0) call m_trap In the trap, and after we've saved the context, we then start giving information over to the Rust trap handler, m_trap. These parameters must match the order in Rust. WebNov 27, 2024 · RISC-V Privilege Levels RISC-V defines three privilege modes: machine mode (M), supervisor mode (S), and user mode (U). The M Mode is mandatory, and the other two modes are optional. Different modes can be combined to implement systems for different purposes. M: simple embedded systems how does a smartwatch measure rem sleep
Constructive Computer Architecture: RISC-V Instruction Set Architecture ...
http://csg.csail.mit.edu/6.175/archive/2015/lectures/L19-ExceptionsRev.pdf WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH v6 0/3] Allow accessing CSR using CSR number @ 2024-04-25 8:38 Anup Patel 2024-04-25 8:38 ` [PATCH v6 1/3] RISC-V: Use tabs to align macro values in asm/csr.h Anup Patel ` (3 more replies) 0 siblings, 4 replies; 6+ messages in thread From: Anup Patel @ 2024-04-25 … Web这个过程是编译器帮我们实现,有一点需要注意的是我们移植的代码里面进中断后获取了中断的堆栈“csrrw sp,mscratch,sp”,返回时恢复了线程的堆栈指针“csrrw sp,mscratch,sp” … phosphated and oiled