mirror of
https://github.com/AsahiLinux/u-boot
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75 lines
2.7 KiB
Text
75 lines
2.7 KiB
Text
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Andes Technology SoC AG101
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==========================
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AG101 is the first SoC produced by Andes Technology using N1213 CPU core.
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AG101 has integrated both AHB and APB bus and many periphals for application
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and product development.
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ADP-AG101
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=========
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ADP-AG101 is the SoC with AG101 hardcore CPU.
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Please check http://www.andestech.com/p2-4.htm for detail of this SoC.
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Configurations
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==============
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CONFIG_MEM_REMAP:
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Doing memory remap is essential for preparing some non-OS or RTOS
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applications.
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This is also a must on ADP-AG101 board.
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(While other boards may not have this problem).
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The reason is because the ROM/FLASH circuit on PCB board.
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AG101-A0 board has 2 jumpers MA17 and SW5 to configure which
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ROM/FLASH is used to boot.
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When SW5 = "0101", MA17 = LO, the ROM is connected to BANK0,
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and the FLASH is connected to BANK1.
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When SW5 = "1010", MA17 = HI, the ROM is disabled (still at BANK0),
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and the FLASH is connected to BANK0.
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It will occur problem when doing flash probing if the flash is at
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BANK0 (0x00000000) while memory remapping was skipped.
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Other board like ADP-AG101P may not enable this since there is only
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a FLASH connected to bank0.
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CONFIG_SKIP_LOWLEVEL_INIT:
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If you want to boot this system from FLASH and bypass e-bios (the
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other boot loader on ROM). You should undefine CONFIG_SKIP_LOWLEVEL_INIT
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in "include/configs/adp-ag101.h".
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Build and boot steps
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====================
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build:
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1. Prepare the toolchains and make sure the $PATH to toolchains is correct.
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2. Use `make adp-ag101` in u-boot root to build the image.
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burn u-boot to flash:
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1. Make sure the MA17 (J16) is Lo.
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2. Make sure the dip switch SW5 is set to "0101".
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3. Power On. Press button "S1", then press button "SW1", then you will found the
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debug LED show 67 means the system successfully booted into e-bios.
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Now you can control the e-bios boot loader from your console.
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4. Under "Command>>" prompt, enter "97" (CopyImageFromCard)
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5. Under "Type Dir Name of [CF/SD] =>" promtp, enter "c".
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6. Under "Enter Filename =>" prompt, enter the file name of u-boot image you
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just build. It is usually "u-boot.bin".
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7. Under "Enter Dest. Address =>" prompt, enter the memory address where you
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want to put the binary from SD card to RAM.
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Address "0x500000" is our suggestion.
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8. Under "Command>>" prompt again, enter "55" (CLI) to use interactive command
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environment.
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9. Under "CLI>" prompt, enter "burn 0x500000 0x80400000 0x30000" to burn the
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binary from RAM to FLASH.
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10. Under "CLI>" prompt, enter "exit" to finish the burn process.
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boot u-boot from flash:
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1. Make sure the MA17 (J16) is Hi).
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2. Make sure the dip switch SW5 is set to "1010".
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3. Power On. Press button "S1", then you will see the debug LED count to 20.
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4. Now you can use u-boot on ADP-AG101 board.
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