My U-boot 1.2.0 works fine before. but I want to add some memory test actions before u-boot start Linux. I use the "mtest" command to test the memory. But the "mtest" command will test the memory infinitely. So, I change the /common/cmd_mem.c, and do the following change:
#if defined(CFG_ALT_MEMTEST) printf(.....); PRINTF(...); for(;iterations == 1;) /* for(;;) { */ ....
Which I think will make the memory test only once.
But after I cross-compile the u-boot, the "Unknown FLASH" happens:
FLASH: ## Unknown FLASH on Bank 0 ## Unknown FLASH on Bank 0 - Siz= 0x00000000 = 0 MB *** failed *** ### ERROR ### Please RESET the board ###
But after I add these in my board flash.c file, the u-boot works well again:
for(i = 0; i < 100; i++) printf("");
the above lines is added in flash_get_size function, after I get the 4 codes of the flash, and before I start to compare the codes with S29GL_ID0.
Anybody get any idea?