Djam/arm-trusted-firmware
1
0
Fork 0
mirror of https://github.com/ARM-software/arm-trusted-firmware.git synced 2025-04-18 10:34:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Merge pull request #1501 from robertovargas-arm/cci

Browse source 
cci: Wait before reading status register
This commit is contained in:
Dimitris Papastamos 2018-08-06 16:09:20 +01:00 • committed by GitHub
commit 781842ea8a
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 13 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
drivers/arm/cci/cci.c
View file

@ -5,6 +5,7 @@
*/
#include <arch.h>
#include <arch_helpers.h>
#include <assert.h>
#include <cci.h>
#include <debug.h>
@ -142,6 +143,12 @@ void cci_enable_snoop_dvm_reqs(unsigned int master_id)
SLAVE_IFACE_OFFSET(slave_if_id) + SNOOP_CTRL_REG,
DVM_EN_BIT | SNOOP_EN_BIT);
/*
* Wait for the completion of the write to the Snoop Control Register
* before testing the change_pending bit
*/
dmbish();
/* Wait for the dust to settle down */
while (mmio_read_32(cci_base + STATUS_REG) & CHANGE_PENDING_BIT)
;
@ -163,6 +170,12 @@ void cci_disable_snoop_dvm_reqs(unsigned int master_id)
SLAVE_IFACE_OFFSET(slave_if_id) + SNOOP_CTRL_REG,
~(DVM_EN_BIT | SNOOP_EN_BIT));
/*
* Wait for the completion of the write to the Snoop Control Register
* before testing the change_pending bit
*/
dmbish();
/* Wait for the dust to settle down */
while (mmio_read_32(cci_base + STATUS_REG) & CHANGE_PENDING_BIT)
;