From 9e9871359d6438baaeeb08ebc936fd35e4798e10 Mon Sep 17 00:00:00 2001
From: aiminick <aiminick@openfans.org>
Date: Wed, 7 Apr 2021 22:54:03 +0800
Subject: [PATCH] Create uboot.md

---
 docs/uboot.md | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 docs/uboot.md

diff --git a/docs/uboot.md b/docs/uboot.md
new file mode 100644
index 0000000..52f3ac5
--- /dev/null
+++ b/docs/uboot.md
@@ -0,0 +1,19 @@
+#### build
+
+```
+git clone https://github.com/u-boot/u-boot
+make distclean
+make rpi_4_defconfig
+make -j X
+```
+
+#### config.txt
+
+```
+kernel=u-boot.bin
+kernel_address=Ox00080000
+arm_64bit=1
+enable_uart=1
+uart_2ndstage=1
+enable_gic=1
+```