Eric Lee / smarc-uboot

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d41ce506b   Eric Lee   Initial Release, ... 
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  SPEAr (Structured Processor Enhanced Architecture).
  
  SPEAr600 is also known as SPEArPlus and SPEAr300 is also known as SPEArBasic
  
  The SPEAr SoC family embeds a customizable logic that can be programmed
  one-time by a customer at silicon mask level (i.e. not at runtime!).
  
  U-Boot supports four SoCs: SPEAr600, SPEAr3xx
  
  All 4 SoCs (SPEAr3xx and SPEAr600) share common peripherals. SPEAr300 and
  SPEAr600 do not have EMI.
  
  1. ARM926ejs core based (sp600 has two cores, the 2nd handled only in Linux)
  2. FastEthernet (sp600 has Gbit version, but same controller - GMAC)
  3. USB Host
  4. USB Device
  5. NAND controller (FSMC)
  6. Serial NOR ctrl
  7. I2C
  8. SPI
  9. CLCD
  10. others ..
  
  Everything is supported in Linux.
  u-boot is currently not supporting all peripeharls (just a few as listed below).
  1. USB Device
  2. NAND controller (FSMC)
  3. Serial Memory Interface
  4. EMI (Parallel NOR interface)
  4. I2C
  5. UART
  
  Build options
  	make spear320_config
  		spear320 build with environment variables placed at default
  		location i.e. Serial NOR device
  	make spear320_pnor_config
  		This option generates a uboot image that supports emi controller
  		for CFI compliant parallel NOR flash. Environment variables are
  		placed in Parallel NOR device
  	make spear320_nand_config
  		spear320 build with environment variables placed in NAND device
  	make spear320_usbtty_config
  		spear320 build with usbtty terminal as default and environment
  		placed at default location
  	make spear320_usbtty_pnor_config
  		spear320 build with usbtty terminal as default and environment
  		placed in pnor device
  	make spear320_usbtty_nand_config
  		Build with usbtty terminal as default and environment placed in
  		NAND device
  	make spear300_config
  	make spear300_nand_config
  	make spear300_usbtty_config
  	make spear300_usbtty_nand_config
  	make spear310_config
  	make spear310_pnor_config
  	make spear310_nand_config
  	make spear310_usbtty_config
  	make spear310_usbtty_pnor_config
  	make spear310_usbtty_nand_config
  	make spear600_config
  	make spear600_nand_config
  	make spear600_usbtty_config
  	make spear600_usbtty_nand_config
  
  Mac id storage and retrieval in spear platforms
  
  Please read doc/README.enetaddr for the implementation guidelines for mac id
  usage. Basically, environment has precedence over board specific storage. The
  ethaddr beeing used for the network interface is always taken only from
  environment variables. Although, we can check the mac id programmed in i2c
  memory by using chip_config command