yu at mp-sun1.informatik.uni-mannheim.de
Wed Jan 29 07:59:52 CET 2003
Now I am trying to port ppcboot to a simple custom board,
with ppc405cr, 32M RAM, 4M EEPROM, JTAG, UART.
I can not understand some Marcos in the header file include/configs/xxx.h.
#define CFG_INIT_DCACHE_CS 4 /* use cs # 4 for data cache
there is no OCM in 405CR, so ppcboot needs data cache for initial stacks
but what does the "chip select" mean?
As I know, chip select should be used on some peripheral devices, like
why is it needed for data cache which is inside the CPU core?
Is the CS only a concept inside ppcboot? or something according to
thanks a lot in advance.
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