On Sep 23, 2009, at 2:20 AM, Mingkai Hu wrote: > The MPC8536E is capable of booting from the on-chip ROM - boot from > eSDHC and boot from eSPI. When power on, the porcessor excutes the > ROM code to initialize the eSPI/eSDHC controller, and loads the mian > U-Boot image from the memory device that interfaced to the controller, > such as the SDCard or SPI EEPROM, to the target memory, e.g. SDRAM or > L2SRAM, then boot from it. > > The memory device should contain a specific data structure with > control > word and config word at the fixed address. The config word direct the > process how to config the memory device, and the control word direct > the processor where to find the image on the memory device, or where > copy the main image to. The user can use any method to store the data > structure to the memory device, only if store it on the assigned > address. > > The on-chip ROM code will map the whole 4GB address space by setting > entry0 in the TLB1, so the main image need to switch to Address > space 1 > to disable this mapping and map the address space again. > > This patch implements loading the mian U-Boot image into L2SRAM, so > the image can configure the system memory by using SPD EEPROM. > > Signed-off-by: Mingkai Hu <mingkai...@freescale.com> > --- > > Change over v3: > - Aligned owing to the modificatoin of the board config file. > > MAKEALL | 2 ++ > Makefile | 2 ++ > board/freescale/mpc8536ds/config.mk | 12 ++++++++++++ > include/configs/MPC8536DS.h | 17 ++++++++++++++++- > 4 files changed, 32 insertions(+), 1 deletions(-)
applied to 85xx - k _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
