From f9cfe301c92aede87e46069e66e250d4039e413e Mon Sep 17 00:00:00 2001
From: Bin Meng <bmeng.cn@gmail.com>
Date: Wed, 27 Mar 2019 22:58:49 +0800
Subject: lib: Disable the boot prints if SBI_SCRATCH_NO_BOOT_PRINTS is set

Use the newly introduced "options" in "struct sbi_scratch" to
conditionally disable the boot prints.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
---
 docs/firmware/fw.md | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'docs')

diff --git a/docs/firmware/fw.md b/docs/firmware/fw.md
index acff4a6..8ca54b6 100644
--- a/docs/firmware/fw.md
+++ b/docs/firmware/fw.md
@@ -75,3 +75,18 @@ make PLATFORM=<platform_subdir> FW_PAYLOAD_PATH=<payload path>
 The instructions to build each payload is different and the details can
 be found in the
 *docs/firmware/payload_<payload_name>.md* files.
+
+Options for OpenSBI Firmware behaviors
+--------------------------------------
+An optional compile time flag FW_OPTIONS can be used to control the OpenSBI
+firmware run-time behaviors.
+
+```
+make PLATFORM=<platform_subdir> FW_OPTIONS=<options>
+```
+
+FW_OPTIONS is a bitwise or'ed value of various options, eg: *FW_OPTIONS=0x1*
+stands for disabling boot prints from the OpenSBI library.
+
+For all supported options, please check "enum sbi_scratch_options" in the
+*include/sbi/sbi_scratch.h* header file.
-- 
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