[U-Boot] [PATCH 13/13] am65x: README: Add eMMC layout and flash instructions

Andreas Dannenberg
2019-05-07T17:25:42Z

From: Faiz Abbas <faiz_abbas@ti.com>

Add instructions for flashing boot images to the eMMC with a
layout of the address where each image needs to be flashed.

Also add instructions to flash filesystem partition in user
partition and boot kernel from the rootfs.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
---
board/ti/am65x/README | 52 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)

diff --git a/board/ti/am65x/README b/board/ti/am65x/README
index 0b82bd557b..16384e05ea 100644
--- a/board/ti/am65x/README
+++ b/board/ti/am65x/README
@@ -209,3 +209,55 @@ Image formats:
| | Secure config | |
| +-------------------+ |
+-----------------------+
+
+eMMC:
+-----
+ROM supports booting from eMMC from boot0 partition offset 0x0
+
+Flashing images to eMMC:
+
+The following commands can be used to download tiboot3.bin, tispl.bin,
+u-boot.img, and sysfw.itb from an SD card and write them to the eMMC boot0
+partition at respective addresses.
+
+=> mmc dev 0 1
+=> fatload mmc 1 ${loadaddr} tiboot3.bin
+=> mmc write ${loadaddr} 0x0 0x400
+=> fatload mmc 1 ${loadaddr} tispl.bin
+=> mmc write ${loadaddr} 0x400 0x1000
+=> fatload mmc 1 ${loadaddr} u-boot.img
+=> mmc write ${loadaddr} 0x1400 0x2000
+=> fatload mmc 1 ${loadaddr} sysfw.itb
+=> mmc write ${loadaddr} 0x3600 0x800
+
+To give the ROM access to the boot partition, the following commands must be
+used for the first time:
+=> mmc partconf 0 1 1 1
+=> mmc bootbus 0 1 0 0
+
+To create a software partition for the rootfs, the following command can be
+used:
+=> gpt write mmc 0 ${partitions}
+
+eMMC layout:
+
+ boot0 partition (8 MB) user partition
+ 0x0+----------------------------------+ 0x0+-------------------------+
+ | tiboot3.bin (512 KB) | | |
+ 0x400+----------------------------------+ | |
+ | tispl.bin (2 MB) | | |
+0x1400+----------------------------------+ | rootfs |
+ | u-boot.img (4 MB) | | |
+0x3400+----------------------------------+ | |
+ | environment (128 KB) | | |
+0x3500+----------------------------------+ | |
+ | backup environment (128 KB) | | |
+0x3600+----------------------------------+ | |
+ | sysfw (1 MB) | | |
+0x3E00+----------------------------------+ +-------------------------+
+
+Kernel image and DT are expected to be present in the /boot folder of rootfs.
+To boot kernel from eMMC, use the following commands:
+=> setenv mmcdev 0
+=> setenv bootpart 0
+=> boot
--
2.17.1