A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 11:41:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

ARM: 8610/1: V7M: Add dsb before jumping in handler mode

Browse source 
According to ARM AN321 (section 4.12):

"If the vector table is in writable memory such as SRAM, either relocated
by VTOR or a device dependent memory remapping mechanism, then
architecturally a memory barrier instruction is required after the vector
table entry is updated, and if the exception is to be activated
immediately"

Reviewed-by: Vladimir Murzin <[email protected]>
Signed-off-by: Maxime Coquelin <[email protected]>
Signed-off-by: Alexandre TORGUE <[email protected]>
Signed-off-by: Russell King <[email protected]>
This commit is contained in:
Torgue Alexandre 2016-08-31 09:14:14 +01:00 • committed by Russell King
commit 8e02676ffa
1 changed files with 1 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
arch/arm/mm/proc-v7m.S
View file

@ -132,6 +132,7 @@ __v7m_setup_cont:
badr r1, 1f
ldr r5, [r12, #11 * 4] @ read the SVC vector entry
str r1, [r12, #11 * 4] @ write the temporary SVC vector entry
dsb
mov r6, lr @ save LR
ldr sp, =init_thread_union + THREAD_START_SP
cpsie i