Nand flash 要改 layout include/configs/am335x_evm.h 修改 define 這樣可以影響arch/arm/include/asm/arch-am335x/omap_gpmc.h (之前是 arch-omap3/) DRAM 要改 timing arch/arm/include/asm/arch-am33xx/ddr_defs.h arch/arm/cpu/armv7/am33xx/board.c 中會 invoke config_ddr –> config_sdram
Read More →In this article we focus on some study notes in linux kernel startup and we mainly focus on start_kernel Specific Arch Initialize in @/init/main.c we could find asmlinkage void __init start_kernel(void) This is the main function to initialize linux kernel. start_kernel() –> setup_arch(&command_line) –> setup_process() will detect the CPU type and invoke high level cpu […]
Read More →We could know the MTD structure of AM335x via cat /proc/mtd and we will get dev: size erasesize name mtd0: 00020000 00020000 “SPL” mtd1: 00020000 00020000 “SPL.backup1” mtd2: 00020000 00020000 “SPL.backup2” mtd3: 00020000 00020000 “SPL.backup3” mtd4: 001e0000 00020000 “U-Boot” mtd5: 00020000 00020000 “U-Boot Env” mtd6: 00500000 00020000 “Kernel” mtd7: 0f880000 00020000 “File System” […]
Read More →Since I am crazy and would like to know linux kernel porting in more detail. I decided to port TI-AM334x EVM from 32.0 to 3.7.2 (The last stable version I can get now) First check what file located in original TI SDK and not in original linux kernel @/arch/arm/configs amx335x_evm_defconfig @/arch/arm/mach-omap2/ include/mach/board-am335xevm.h board-am335xevm.c clock33xx.h cminst33xx.h […]
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