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diff --git a/doc/README.ag101 b/doc/README.ag101 new file mode 100644 index 0000000..46fc637 --- /dev/null +++ b/doc/README.ag101 @@ -0,0 +1,74 @@ +Andes Technology SoC AG101 +========================== + +AG101 is the first SoC produced by Andes Technology using N1213 CPU core. +AG101 has integrated both AHB and APB bus and many periphals for application +and product development. + +ADP-AG101 +========= + +ADP-AG101 is the SoC with AG101 hardcore CPU. + +Please check http://www.andestech.com/p2-4.htm for detail of this SoC. + +Configurations +============== + +CONFIG_MEM_REMAP: + Doing memory remap is essential for preparing some non-OS or RTOS + applications. + + This is also a must on ADP-AG101 board. + (While other boards may not have this problem). + + The reason is because the ROM/FLASH circuit on PCB board. + AG101-A0 board has 2 jumpers MA17 and SW5 to configure which + ROM/FLASH is used to boot. + + When SW5 = "0101", MA17 = LO, the ROM is connected to BANK0, + and the FLASH is connected to BANK1. + When SW5 = "1010", MA17 = HI, the ROM is disabled (still at BANK0), + and the FLASH is connected to BANK0. + It will occur problem when doing flash probing if the flash is at + BANK0 (0x00000000) while memory remapping was skipped. + + Other board like ADP-AG101P may not enable this since there is only + a FLASH connected to bank0. + +CONFIG_SKIP_LOWLEVEL_INIT: + If you want to boot this system from FLASH and bypass e-bios (the + other boot loader on ROM). You should undefine CONFIG_SKIP_LOWLEVEL_INIT + in "include/configs/adp-ag101.h". + +Build and boot steps +==================== + +build: +1. Prepare the toolchains and make sure the $PATH to toolchains is correct. +2. Use `make adp-ag101` in u-boot root to build the image. + +burn u-boot to flash: +1. Make sure the MA17 (J16) is Lo. +2. Make sure the dip switch SW5 is set to "0101". +3. Power On. Press button "S1", then press button "SW1", then you will found the + debug LED show 67 means the system successfully booted into e-bios. + Now you can control the e-bios boot loader from your console. +4. Under "Command>>" prompt, enter "97" (CopyImageFromCard) +5. Under "Type Dir Name of [CF/SD] =>" promtp, enter "c". +6. Under "Enter Filename =>" prompt, enter the file name of u-boot image you + just build. It is usually "u-boot.bin". +7. Under "Enter Dest. Address =>" prompt, enter the memory address where you + want to put the binary from SD card to RAM. + Address "0x500000" is our suggestion. +8. Under "Command>>" prompt again, enter "55" (CLI) to use interactive command + environment. +9. Under "CLI>" prompt, enter "burn 0x500000 0x80400000 0x30000" to burn the + binary from RAM to FLASH. +10. Under "CLI>" prompt, enter "exit" to finish the burn process. + +boot u-boot from flash: +1. Make sure the MA17 (J16) is Hi). +2. Make sure the dip switch SW5 is set to "1010". +3. Power On. Press button "S1", then you will see the debug LED count to 20. +4. Now you can use u-boot on ADP-AG101 board. |