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For some reason the AT91rm9200 lowlevel init writes to a bunch of reserved or read-only addresses. All the boards seem to define the value-to-be-written values as zero ... but they shouldn't actually be writing *anything* there. No documented erratum justifies these accesses. It looks like maybe some pre-release BDI-2000 setup code has been carried along by cargo cult programming since at least late 2004 (per GIT history). Here's a patch disabling what seems to be bogosity. Tested on a csb337; there were no behavioral changes. Signed-off-by: David Brownell <david-b@pacbell.net> on RM9200ek Tested-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
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| .. | ||
| at91rm9200 | ||
| imx | ||
| ks8695 | ||
| s3c24x0 | ||
| config.mk | ||
| cpu.c | ||
| interrupts.c | ||
| Makefile | ||
| start.S | ||
| u-boot.lds | ||