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Vipin KUMAR6fffcdf2010-01-15 19:15:42 +05301
2SPEAr (Structured Processor Enhanced Architecture).
3
4SPEAr600 is also known as SPEArPlus and SPEAr300 is also known as SPEArBasic
5
6The SPEAr SoC family embeds a customizable logic that can be programmed
7one-time by a customer at silicon mask level (i.e. not at runtime!).
8
Vipin KUMARf273e5b2012-05-07 13:06:46 +05309U-Boot supports four SoCs: SPEAr600, SPEAr3xx
Vipin KUMAR6fffcdf2010-01-15 19:15:42 +053010
Vipin KUMARf273e5b2012-05-07 13:06:46 +053011All 4 SoCs (SPEAr3xx and SPEAr600) share common peripherals. SPEAr300 and
12SPEAr600 do not have EMI.
Vipin KUMAR6fffcdf2010-01-15 19:15:42 +053013
141. ARM926ejs core based (sp600 has two cores, the 2nd handled only in Linux)
152. FastEthernet (sp600 has Gbit version, but same controller - GMAC)
163. USB Host
174. USB Device
185. NAND controller (FSMC)
196. Serial NOR ctrl
207. I2C
218. SPI
229. CLCD
2310. others ..
24
25Everything is supported in Linux.
Vipin KUMARf273e5b2012-05-07 13:06:46 +053026u-boot is currently not supporting all peripeharls (just a few as listed below).
Vipin KUMAR6fffcdf2010-01-15 19:15:42 +0530271. USB Device
282. NAND controller (FSMC)
293. Serial Memory Interface
304. EMI (Parallel NOR interface)
314. I2C
325. UART
33
34Build options
Vipin KUMAR6fffcdf2010-01-15 19:15:42 +053035 make spear320_config
Vipin KUMARf273e5b2012-05-07 13:06:46 +053036 spear320 build with environment variables placed at default
37 location i.e. Serial NOR device
38 make spear320_pnor_config
39 This option generates a uboot image that supports emi controller
40 for CFI compliant parallel NOR flash. Environment variables are
41 placed in Parallel NOR device
42 make spear320_nand_config
43 spear320 build with environment variables placed in NAND device
44 make spear320_usbtty_config
45 spear320 build with usbtty terminal as default and environment
46 placed at default location
47 make spear320_usbtty_pnor_config
48 spear320 build with usbtty terminal as default and environment
49 placed in pnor device
50 make spear320_usbtty_nand_config
51 Build with usbtty terminal as default and environment placed in
52 NAND device
53 make spear300_config
54 make spear300_nand_config
55 make spear300_usbtty_config
56 make spear300_usbtty_nand_config
57 make spear310_config
58 make spear310_pnor_config
59 make spear310_nand_config
60 make spear310_usbtty_config
61 make spear310_usbtty_pnor_config
62 make spear310_usbtty_nand_config
63 make spear600_config
64 make spear600_nand_config
65 make spear600_usbtty_config
66 make spear600_usbtty_nand_config
Vipin KUMAR8026b1e2012-05-07 13:06:41 +053067
68Mac id storage and retrieval in spear platforms
69
70Please read doc/README.enetaddr for the implementation guidelines for mac id
71usage. Basically, environment has precedence over board specific storage. The
72ethaddr beeing used for the network interface is always taken only from
73environment variables. Although, we can check the mac id programmed in i2c
74memory by using chip_config command