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@@ -31,6 +31,9 @@ TODO:
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stdout-path = "/soc/serial@10010000:115200";
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};
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+Booting from MMC using FSBL
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+---------------------------
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+
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Building
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--------
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@@ -420,3 +423,124 @@ as well.
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Please press Enter to activate this console.
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/ #
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+
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+Booting from MMC using U-Boot SPL
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+---------------------------------
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+
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+Building
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+--------
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+
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+Before building U-Boot SPL, OpenSBI must be built first. OpenSBI can be
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+cloned and built for FU540 as below:
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+
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+.. code-block:: console
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+
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+ git clone https://github.com/riscv/opensbi.git
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+ cd opensbi
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+ make PLATFORM=generic
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+ export OPENSBI=<path to opensbi/build/platform/generic/firmware/fw_dynamic.bin>
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+
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+Now build the U-Boot SPL and U-Boot proper
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+
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+.. code-block:: console
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+
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+ cd <U-Boot-dir>
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+ make sifive_fu540_defconfig
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+ make
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+
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+This will generate spl/u-boot-spl.bin and FIT image (u-boot.itb)
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+
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+
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+Flashing
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+--------
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+
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+ZSBL loads the U-Boot SPL (u-boot-spl.bin) from a partition with GUID type
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+5B193300-FC78-40CD-8002-E86C45580B47
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+
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+U-Boot SPL expects a U-Boot FIT image (u-boot.itb) from a partition with GUID
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+type 2E54B353-1271-4842-806F-E436D6AF6985
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+
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+FIT image (u-boot.itb) is a combination of fw_dynamic.bin, u-boot-nodtb.bin and
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+device tree blob (hifive-unleashed-a00.dtb)
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+
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+Format the SD card (make sure the disk has GPT, otherwise use gdisk to switch)
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+
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+.. code-block:: none
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+
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+ # sudo sgdisk --clear \
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+ > --set-alignment=2 \
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+ > --new=1:34:2081 --change-name=1:loader1 --typecode=1:5B193300-FC78-40CD-8002-E86C45580B47 \
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+ > --new=2:2082:10273 --change-name=2:loader2 --typecode=2:2E54B353-1271-4842-806F-E436D6AF6985 \
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+ > --new=3:10274: --change-name=3:rootfs --typecode=3:0FC63DAF-8483-4772-8E79-3D69D8477DE4 \
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+ > /dev/sda
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+
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+Program the SD card
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+
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+.. code-block:: none
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+
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+ sudo dd if=spl/u-boot-spl.bin of=/dev/sda seek=34
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+ sudo dd if=u-boot.itb of=/dev/sda seek=2082
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+
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+Booting
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+-------
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+Once you plugin the sdcard and power up, you should see the U-Boot prompt.
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+
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+Sample boot log from HiFive Unleashed board
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+-------------------------------------------
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+
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+.. code-block:: none
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+
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+ U-Boot SPL 2020.04-rc2-00109-g63efc7e07e-dirty (Apr 30 2020 - 13:52:36 +0530)
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+ Trying to boot from MMC1
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+
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+
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+ U-Boot 2020.04-rc2-00109-g63efc7e07e-dirty (Apr 30 2020 - 13:52:36 +0530)
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+
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+ CPU: rv64imafdc
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+ Model: SiFive HiFive Unleashed A00
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+ DRAM: 8 GiB
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+ MMC: spi@10050000:mmc@0: 0
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+ In: serial@10010000
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+ Out: serial@10010000
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+ Err: serial@10010000
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+ Net: eth0: ethernet@10090000
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+ Hit any key to stop autoboot: 0
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+ => version
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+ U-Boot 2020.04-rc2-00109-g63efc7e07e-dirty (Apr 30 2020 - 13:52:36 +0530)
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+
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+ riscv64-unknown-linux-gnu-gcc (crosstool-NG 1.24.0.37-3f461da) 9.2.0
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+ GNU ld (crosstool-NG 1.24.0.37-3f461da) 2.32
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+ => mmc info
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+ Device: spi@10050000:mmc@0
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+ Manufacturer ID: 3
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+ OEM: 5344
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+ Name: SC16G
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+ Bus Speed: 20000000
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+ Mode: SD Legacy
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+ Rd Block Len: 512
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+ SD version 2.0
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+ High Capacity: Yes
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+ Capacity: 14.8 GiB
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+ Bus Width: 1-bit
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+ Erase Group Size: 512 Bytes
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+ => mmc part
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+
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+ Partition Map for MMC device 0 -- Partition Type: EFI
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+
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+ Part Start LBA End LBA Name
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+ Attributes
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+ Type GUID
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+ Partition GUID
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+ 1 0x00000022 0x00000821 "loader1"
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+ attrs: 0x0000000000000000
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+ type: 5b193300-fc78-40cd-8002-e86c45580b47
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+ guid: 66e2b5d2-74db-4df8-ad6f-694b3617f87f
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+ 2 0x00000822 0x00002821 "loader2"
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+ attrs: 0x0000000000000000
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+ type: 2e54b353-1271-4842-806f-e436d6af6985
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+ guid: 8befaeaf-bca0-435d-b002-e201f37c0a2f
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+ 3 0x00002822 0x01dacbde "rootfs"
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+ attrs: 0x0000000000000000
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+ type: 0fc63daf-8483-4772-8e79-3d69d8477de4
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+ type: linux
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+ guid: 9faa81b6-39b1-4418-af5e-89c48f29c20d
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