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docs: platform: update platform_requirements.md

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"Zicsr" isa extension has been separated from "I" extension.
This patch add the isa requirement of "Zicsr" extension in
platform requirements documentation.

Signed-off-by: Yangjie Zhang <jay1273062855@outlook.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Yangjie Zhang 2023-09-28 16:25:23 +08:00 • committed by Anup Patel
parent d891caeae9
commit e8114c6ae2
1 changed files with 2 additions and 2 deletions
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4
docs/platform_requirements.md
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@ -18,7 +18,7 @@ Base Platform Requirements
The base RISC-V platform requirements for OpenSBI are as follows:
1. At least rv32ima or rv64ima required on all HARTs
1. At least rv32ima_zicsr or rv64ima_zicsr required on all HARTs
2. At least one HART should have S-mode support because:
* SBI calls are meant for RISC-V S-mode (Supervisor mode)
@ -33,7 +33,7 @@ The base RISC-V platform requirements for OpenSBI are as follows:
6. Hardware support for injecting M-mode software interrupts on
a multi-HART platform
The RISC-V extensions not covered by rv32ima or rv64ima are optional
The RISC-V extensions not covered by rv32ima_zicsr or rv64ima_zicsr are optional
for OpenSBI. Although, OpenSBI will detect and handle some of these
optional RISC-V extensions at runtime.