尽管priv spec中并没有讨论trap into x-mode时mstatus.xIE是否需要立即更改,但就我所见的,硬件实现都选择了在trap-in的时候立即将mstatus.xIE设为0,并且软件实现方面也会假设trap-in时mstatus.xIE就已经自动被设为0了。 priv spec没有对此进行论述,可能是认为这是执行环境(具体地,执行环境所提供的(trap处理)服...
这是一个看一遍riscv unpriv manual的笔记(以程序员视角为主),也是想梳理一下个人目前对这个文档的理解,仅此。 Base RISC-V ISA Base modules riscv是一个模块化的指令集,其中划分为基础指令集(base)和扩展指令集(extensions),base部分涵盖基础功能: 内存模型(如上图中的RVWMO, riscv weak memory ordering),...
The RISC-V Instruction Set Manual, Volume II: Privileged Architecture , Priv-v1.12 2021/12/03 3 Machine-Level ISA, Version 1.12This chapter describes the machine-level operations available in machine-mode (M-mode), which is the highest privilege mode in a RISC-V system. M-mode is used ...
I'm trying to add support for specifying a spec version to the Sail model, but I'm having a really hard time working out which versions of the specs actually exist. As far as I can tell there's RISC-V Technical Specificationshas the latest versions, Unpriv 20240411 and Priv 20240411 RI...
[6] the RISC-V International Technical Working Groups. RISC-V Instruction Set Manual Volume 2, Privileged Spec v. 20211203[EB/OL].https://github.com/riscv/riscv-isa-manual/releases/download/Priv-v1.12/riscv-privileged-20211203.pdf, 2021-12-03. ...
priv->regs+CONTEXT_BASE+i*CONTEXT_PER_HART; 其中regs是设备树中传递过来的plic基地址,上上面的布局对应。 这里的i来源于 nr_contexts = of_irq_count(node); 即来源于设备树,比如如下 interrupts-extended =; 有两个中断一个是parent是0x02的中断号0x0b,一个是parent是0x02的中断号0x09, ...
• RISC-V - Instruction Set Manual, Volume II: Privileged Architecture –Version 1.10: –Version 1.11: Equivalent to 20190405 –Version 20190405: Priv-MSU-Ratification –Version master: Master Branch (1.12 draft) • RISC-V “V” - Vector Extension –Version 0.7.1: draft-20190605 –Vers...
and Unpriv. specifications at https://github.com/riscv/riscv-isa-manual Makefile 86 CC-BY-4.0 22 0 0 Updated Feb 20, 2025 riscv-performance-event-sampling Public Define 2 new extensions to, along with Zihpm and Sscofpmf, enable event and instruction sampling with precise attribution...
NameSupplierLinksPriv. specUser specPrimary LanguageLicense RV32EC_P2IQonIC WorksWebsite1.11RV32E[M]C/RV32I[M]CSystemVerilogIQonIC Works Commercial License RV32IC_P5IQonIC WorksWebsite1.11RV32I[M][N][A]CSystemVerilogIQonIC Works Commercial License ...
RISC-V - Instruction Set Manual, Volume I: User-Level ISA (user_version) Version 2.2 : User Architecture Version 2.2 Version 2.3 : Equivalent to User Architecture Version 20191213 -RISC-V - Instruction Set Manual, Volume II: Privileged Architecture (priv_version) Version 1.10 : Privileged Ar...