mirror of
https://github.com/torvalds/linux
synced 2024-09-30 00:10:51 +00:00
dbece45894
When enabling the MMU for ARMv7 CPUs, the decompressor does not touch the ttbcr register, assuming that it will be zeroed (N == 0, EAE == 0). Given that only EAE is defined as 0 for non-secure copies of the register (and a bootloader such as kexec may leave it set to 1 anyway), we should ensure that we reset the register ourselves before turning on the MMU. This patch zeroes TTBCR.EAE and TTBCR.N prior to enabling the MMU for ARMv7 cores in the decompressor, configuring us exclusively for 32-bit translation tables via TTBR0. Cc: <stable@vger.kernel.org> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Matthew Leach <matthew.leach@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> |
||
|---|---|---|
| .. | ||
| .gitignore | ||
| atags_to_fdt.c | ||
| big-endian.S | ||
| decompress.c | ||
| head-sa1100.S | ||
| head-shark.S | ||
| head-sharpsl.S | ||
| head-shmobile.S | ||
| head-vt8500.S | ||
| head-xscale.S | ||
| head.S | ||
| libfdt_env.h | ||
| ll_char_wr.S | ||
| Makefile | ||
| misc.c | ||
| mmcif-sh7372.c | ||
| ofw-shark.c | ||
| piggy.gzip.S | ||
| piggy.lzma.S | ||
| piggy.lzo.S | ||
| piggy.xzkern.S | ||
| sdhi-sh7372.c | ||
| sdhi-shmobile.c | ||
| sdhi-shmobile.h | ||
| string.c | ||
| vmlinux.lds.in | ||