1.. SPDX-License-Identifier: GPL-2.0+
2
3AT91 Evaluation kits
4====================
5
6Board mapping & boot media
7--------------------------
8
9AT91SAM9260EK, AT91SAM9G20EK & AT91SAM9XEEK
10^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
11
12Memory map::
13
14	0x20000000 - 23FFFFFF	SDRAM (64 MB)
15	0xC0000000 - Cxxxxxxx	Atmel Dataflash card (J13)
16	0xD0000000 - D07FFFFF	Soldered Atmel Dataflash (AT45DB642)
17
18Environment variables
19
20U-Boot environment variables can be stored at different places:
21
22	- Dataflash on SPI chip select 1 (default)
23	- Dataflash on SPI chip select 0 (dataflash card)
24	- Nand flash
25
26You can choose your storage location at config step (here for at91sam9260ek)::
27
28	make at91sam9260ek_nandflash_config	- use nand flash
29	make at91sam9260ek_dataflash_cs0_config	- use data flash (spi cs0)
30	make at91sam9260ek_dataflash_cs1_config	- use data flash (spi cs1)
31
32
33AT91SAM9261EK, AT91SAM9G10EK
34^^^^^^^^^^^^^^^^^^^^^^^^^^^^
35
36Memory map::
37
38	0x20000000 - 23FFFFFF	SDRAM (64 MB)
39	0xC0000000 - C07FFFFF	Soldered Atmel Dataflash (AT45DB642)
40	0xD0000000 - Dxxxxxxx	Atmel Dataflash card (J22)
41
42Environment variables
43
44U-Boot environment variables can be stored at different places:
45
46	- Dataflash on SPI chip select 0 (default)
47	- Dataflash on SPI chip select 3 (dataflash card)
48	- Nand flash
49
50You can choose your storage location at config step (here for at91sam9260ek)::
51
52	make at91sam9261ek_nandflash_config	- use nand flash
53	make at91sam9261ek_dataflash_cs0_config	- use data flash (spi cs0)
54	make at91sam9261ek_dataflash_cs3_config	- use data flash (spi cs3)
55
56
57AT91SAM9263EK
58^^^^^^^^^^^^^
59
60Memory map::
61
62	0x20000000 - 23FFFFFF	SDRAM (64 MB)
63	0xC0000000 - Cxxxxxxx	Atmel Dataflash card (J9)
64
65Environment variables
66
67U-Boot environment variables can be stored at different places:
68
69	- Dataflash on SPI chip select 0 (dataflash card)
70	- Nand flash
71	- Nor flash (not populate by default)
72
73You can choose your storage location at config step (here for at91sam9260ek)::
74
75	make at91sam9263ek_nandflash_config	- use nand flash
76	make at91sam9263ek_dataflash_cs0_config	- use data flash (spi cs0)
77	make at91sam9263ek_norflash_config	- use nor flash
78
79You can choose to boot directly from U-Boot at config step::
80
81	make at91sam9263ek_norflash_boot_config	- boot from nor flash
82
83
84AT91SAM9M10G45EK
85^^^^^^^^^^^^^^^^
86
87Memory map::
88
89	0x70000000 - 77FFFFFF	SDRAM (128 MB)
90
91Environment variables
92
93U-Boot environment variables can be stored at different places:
94
95	- Nand flash
96
97You can choose your storage location at config step (here for at91sam9m10g45ek)::
98
99	make at91sam9m10g45ek_nandflash_config		- use nand flash
100
101
102AT91SAM9RLEK
103^^^^^^^^^^^^
104
105Memory map::
106
107	0x20000000 - 23FFFFFF	SDRAM (64 MB)
108	0xC0000000 - C07FFFFF   Soldered Atmel Dataflash (AT45DB642)
109
110Environment variables
111
112U-Boot environment variables can be stored at different places:
113
114	- Dataflash on SPI chip select 0
115	- Nand flash.
116
117You can choose your storage location at config step (here for at91sam9rlek)::
118
119	make at91sam9rlek_nandflash_config	- use nand flash
120
121
122AT91SAM9N12EK, AT91SAM9X5EK
123^^^^^^^^^^^^^^^^^^^^^^^^^^^
124
125Memory map::
126
127	0x20000000 - 27FFFFFF	SDRAM (128 MB)
128
129Environment variables
130
131U-Boot environment variables can be stored at different places:
132
133	- Nand flash
134	- SD/MMC card
135	- Serialflash/Dataflash on SPI chip select 0
136
137You can choose your storage location at config step (here for at91sam9x5ek)::
138
139	make at91sam9x5ek_dataflash_config	- use data flash
140	make at91sam9x5ek_mmc_config		- use sd/mmc card
141	make at91sam9x5ek_nandflash_config	- use nand flash
142	make at91sam9x5ek_spiflash_config	- use serial flash
143
144
145SAMA5D3XEK
146^^^^^^^^^^
147
148Memory map::
149
150	0x20000000 - 3FFFFFFF	SDRAM (512 MB)
151
152Environment variables
153
154U-Boot environment variables can be stored at different places:
155
156	- Nand flash
157	- SD/MMC card
158	- Serialflash on SPI chip select 0
159
160You can choose your storage location at config step (here for sama5d3xek)::
161
162	make sama5d3xek_mmc_config		- use SD/MMC card
163	make sama5d3xek_nandflash_config	- use nand flash
164	make sama5d3xek_serialflash_config	- use serial flash
165
166
167NAND partition table
168--------------------
169
170All the board support boot from NAND flash will use the following NAND
171partition table::
172
173	0x00000000 - 0x0003FFFF	bootstrap	(256 KiB)
174	0x00040000 - 0x000BFFFF u-boot		(512 KiB)
175	0x000C0000 - 0x000FFFFF env		(256 KiB)
176	0x00100000 - 0x0013FFFF env_redundant	(256 KiB)
177	0x00140000 - 0x0017FFFF spare		(256 KiB)
178	0x00180000 - 0x001FFFFF dtb		(512 KiB)
179	0x00200000 - 0x007FFFFF kernel		(6 MiB)
180	0x00800000 - 0xxxxxxxxx rootfs		(All left)
181
182
183Watchdog support
184----------------
185
186For security reasons, the at91 watchdog is running at boot time and,
187if deactivated, cannot be used anymore.
188If you want to use the watchdog, you will need to keep it running in
189your code (make sure not to disable it in AT91Bootstrap for instance).
190
191In the U-Boot configuration, the AT91 watchdog support is enabled using
192the CONFIG_WDT and CONFIG_WDT_AT91 options.
193