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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