Re: [PATCH] mpc83xx: Don't allow W and G bits in IBATs

On Fri, Jan 27, 2023 at 02:51:06PM +0100, Christophe Leroy wrote:

The "Programming Environments Manual for 32-Bit Implementations of the PowerPC™ Architecture" says "W and G bits are not defined for IBAT registers. Attempting to write to these bits causes boundedly-undefined results"

The "e300 Power Architecture™ Core Family Reference Manual" says the same: "Neither the W or G bits of the IBAT registers should be set. Attempting to write to these bits causes boundedly-undefined results."

Remove the possibility to set those bytes.

Fixes: 30915ab95d9 ("mpc83xx: Migrate BATS config to Kconfig") Signed-off-by: Christophe Leroy christophe.leroy@csgroup.eu Cc: Mario Six mario.six@gdsys.cc

Applied to u-boot/master, thanks!