Vincent Palatin 3df8bd8772 cortex-m: allow to lock/unlock empty MPU region ...

When the MPU region to modify is empty (size == 0) returns EC_SUCCESS
rather than EC_ERROR_INVAL, so we are not failing MPU activation on
systems without anything in the .iram.text section.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

BRANCH=all
BUG=chrome-os-partner:35774
TEST=on Samus, with WP, try "sysjump disable" on the EC command line
and see "RAM locked. Exclusion 20006ee0-20006ee0" message.

Change-Id: I0103e0f7aa81ee64a70dd47ffb1c50067ce5a6ee
Reviewed-on: https://chromium-review.googlesource.com/242690
Trybot-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>

2015-01-23 19:56:17 +00:00

..

include

Protect inactive EC image from code execution

2013-12-17 01:32:24 +00:00

atomic.h

cleanup: Remove checkpatch warnings

2013-12-19 00:12:28 +00:00

build.mk

make the common runtime optional

2014-03-22 06:24:16 +00:00

config_core.h

Move core-specific toolchain configuration to core/ directory

2013-11-07 22:36:05 +00:00

cpu.c

Clean up core routines - cpu, task, watchdog

2012-10-29 12:02:41 -07:00

cpu.h

cpu: Enable reporting of faults

2012-07-02 15:02:07 -07:00

ec.lds.S

fix off-by-one in flash size check

2015-01-14 21:50:10 +00:00

init.S

better unhandled exception panic without runtime

2014-07-03 02:56:52 +00:00

irq_handler.h

stm32f: Add DMA interrupt handlers for channel 1 to 3

2014-10-21 00:44:39 +00:00

mpu.c

cortex-m: allow to lock/unlock empty MPU region

2015-01-23 19:56:17 +00:00

panic.c

extract common core code

2013-12-05 22:30:58 +00:00

switch.S

cortex-m: store FPU regs on context switch

2014-04-18 18:58:36 +00:00

task.c

NVIC: Adjust priority setting

2014-12-17 02:18:16 +00:00

watchdog.c

Remove unneeded includes of registers.h

2013-08-02 17:32:25 -07:00