1.. SPDX-License-Identifier: GPL-2.0
2..  (C) Copyright 2020 Xilinx, Inc.
3
4ZYNQMP-R5
5=========
6
7About this
8----------
9
10This document describes the information about Xilinx Zynq UltraScale+ MPSOC
11U-Boot Cortex R5 support.
12
13ZynqMP R5 boards
14----------------
15
16* zynqmp-r5 - U-Boot running on RPU Cortex-R5
17
18Building
19--------
20
21configure and build armv7 toolchain::
22
23   $ make xilinx_zynqmp_r5_defconfig
24   $ make
25
26Notes
27^^^^^
28
29Output fragment is u-boot.
30
31Loading
32-------
33
34ZynqMP R5 U-Boot was created for supporting loading OS on RPU. There are two
35ways how to start U-Boot on R5.
36
37Bootgen
38^^^^^^^
39
40The first way is to use Xilinx FSBL (First stage
41bootloader) to load u-boot and start it. The following bif can be used for boot
42image generation via Xilinx bootgen utility::
43
44
45  the_ROM_image:
46  {
47  	[bootloader,destination_cpu=r5-0] fsbl_rpu.elf
48  	[destination_cpu=r5-0]u-boot.elf
49  }
50
51Bootgen command for building boot.bin::
52
53  bootgen -image <bif>.bif -r -w -o i boot.bin
54
55
56U-Boot cpu command
57^^^^^^^^^^^^^^^^^^
58
59The second way to load U-Boot to Cortex R5 is from U-Boot running on A53 as is
60visible from the following log::
61
62  U-Boot SPL 2020.10-rc4-00090-g801b3d5c5757 (Sep 15 2020 - 14:07:24 +0200)
63  PMUFW:	v1.1
64  Loading new PMUFW cfg obj (2024 bytes)
65  EL Level:	EL3
66  Multiboot:	0
67  Trying to boot from MMC2
68  spl: could not initialize mmc. error: -19
69  Trying to boot from MMC1
70  spl_load_image_fat_os: error reading image u-boot.bin, err - -2
71  NOTICE:  ATF running on XCZU7EG/EV/silicon v4/RTL5.1 at 0xfffea000
72  NOTICE:  BL31: v2.2(release):v2.2-614-ged9dc512fb9c
73  NOTICE:  BL31: Built : 09:32:09, Mar 13 2020
74
75
76  U-Boot 2020.10-rc4-00090-g801b3d5c5757 (Sep 15 2020 - 14:07:24 +0200)
77
78  Model: ZynqMP ZCU104 RevC
79  Board: Xilinx ZynqMP
80  DRAM:  2 GiB
81  PMUFW:	v1.1
82  EL Level:	EL2
83  Chip ID:	zu7e
84  WDT:   Started with servicing (60s timeout)
85  NAND:  0 MiB
86  MMC:   mmc@ff170000: 0
87  Loading Environment from FAT... *** Warning - bad CRC, using default environment
88
89  In:    serial
90  Out:   serial
91  Err:   serial
92  Bootmode: LVL_SHFT_SD_MODE1
93  Reset reason:	SOFT
94  Net:
95  ZYNQ GEM: ff0e0000, mdio bus ff0e0000, phyaddr 12, interface rgmii-id
96  eth0: ethernet@ff0e0000
97  Hit any key to stop autoboot:  0
98  ZynqMP> setenv autoload no
99  ZynqMP> dhcp
100  BOOTP broadcast 1
101  DHCP client bound to address 192.168.0.167 (8 ms)
102  ZynqMP> tftpboot 20000000 192.168.0.105:u-boot-r5-2.elf
103  Using ethernet@ff0e0000 device
104  TFTP from server 192.168.0.105; our IP address is 192.168.0.167
105  Filename 'u-boot-r5-2.elf'.
106  Load address: 0x20000000
107  Loading: #################################################################
108  	 #################################################################
109  	 #################################################################
110  	 #################################################################
111  	 #################################################################
112  	 #################################################################
113  	 ################
114  	 376 KiB/s
115  done
116  Bytes transferred = 2075464 (1fab48 hex)
117  ZynqMP> setenv autostart no
118  ZynqMP> bootelf -p 20000000
119  ZynqMP> cpu 4 release 10000000 lockstep
120  Using TCM jump trampoline for address 0x10000000
121  R5 lockstep mode
122  ZynqMP>
123
124Then on second uart you can see U-Boot up and running on R5::
125
126  U-Boot 2020.10-rc4-00071-g7045622cc9ba (Sep 16 2020 - 13:38:53 +0200)
127
128  Model: Xilinx ZynqMP R5
129  DRAM:  512 MiB
130  MMC:
131  In:    serial@ff010000
132  Out:   serial@ff010000
133  Err:   serial@ff010000
134  Net:   No ethernet found.
135  ZynqMP r5>
136
137Please make sure MIO pins for uart are properly configured to see output.
138