README.spear contains information about SPEAr architecture and build options etc
Signed-off-by: Vipin vipin.kumar@st.com --- doc/README.spear | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 48 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..a8b1052 --- /dev/null +++ b/doc/README.spear @@ -0,0 +1,48 @@ + +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!). + +We are now adding the support in u-boot for two SoC: SPEAr600 and SPEAr3xx. + +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 .. + +Everything is supported in Linux. +u-boot is not currently 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 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