README.spear contains information about SPEAr architecture and build options etc
Signed-off-by: Vipin vipin.kumar@st.com --- doc/README.spear | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 53 insertions(+), 0 deletions(-) create mode 100644 doc/README.spear
diff --git a/doc/README.spear b/doc/README.spear new file mode 100644 index 0000000..59e9a95 --- /dev/null +++ b/doc/README.spear @@ -0,0 +1,53 @@ + +SPEAr (Structured Processor Enhanced Architecture). + +SPEAr600 is also known as SPEArPlus and SPEAr300 is also known as SPEArBasic + +The SPEAr SoC family also embeds a customizable logic that could be programmed +one-time by a customer at silicon mask level (i.e. not at runtime!). +We are now adding the support in u-boot for two SoC: SPEAr600 and SPEAr3xx. +Pls note that SPEAr300/310/320 differs only for the default customization. + +All 4 SoCs share common peripherals. + +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 .. + +sp600 is not customized by default. +sp3xx are differently customized. +sp300 is more oriented to TELECOM/video (it has tdm, i2s, ITU i/f support) +sp310 for networking (a part GMAC in fixed part, it has 5 MACB ctrls in +custom) +sp320 for industrial (SPP ctrl, CAN ctrl, 2 MACBs, ...) + +Everything is supported in Linux. +u-boot is not currently supporting all peripeharls (just a few). + +More description can be found on Internet, for example here: + +http://embedded-system.net/spear-basic-customizable-arm-based-soc-stmicroele... + +Build options + make spear600_config + make spear300_config + make spear310_config + make spear320_config + +Further options + make ENV=NAND (supported by all 4 SoCs) + - This option generates a uboot image that saves environment inn NAND + + make CONSOLE=USB (supported by all 4 SoCs) + - This option generates a uboot image for using usbdevice as a tty i/f + + make FLASH=PNOR (supported by SPEAr310 and SPEAr320) + - This option generates a uboot image that supports emi controller for + CFI compliant parallel NOR flash