diff options
Diffstat (limited to 'drivers/arm/tzc/tzc400.c')
| -rw-r--r-- | drivers/arm/tzc/tzc400.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/drivers/arm/tzc/tzc400.c b/drivers/arm/tzc/tzc400.c index 9fc1578a1..e4fc8c927 100644 --- a/drivers/arm/tzc/tzc400.c +++ b/drivers/arm/tzc/tzc400.c @@ -68,6 +68,7 @@ DEFINE_TZC_COMMON_WRITE_REGION_BASE(400, 400) DEFINE_TZC_COMMON_WRITE_REGION_TOP(400, 400) DEFINE_TZC_COMMON_WRITE_REGION_ATTRIBUTES(400, 400) DEFINE_TZC_COMMON_WRITE_REGION_ID_ACCESS(400, 400) +DEFINE_TZC_COMMON_UPDATE_FILTERS(400, 400) DEFINE_TZC_COMMON_CONFIGURE_REGION0(400) DEFINE_TZC_COMMON_CONFIGURE_REGION(400) @@ -271,6 +272,15 @@ void tzc400_configure_region(unsigned int filters, sec_attr, nsaid_permissions); } +void tzc400_update_filters(unsigned int region, unsigned int filters) +{ + /* Do range checks on filters and regions. */ + assert(((filters >> tzc400.num_filters) == 0U) && + (region < tzc400.num_regions)); + + _tzc400_update_filters(tzc400.base, region, tzc400.num_filters, filters); +} + void tzc400_enable_filters(void) { unsigned int state; @@ -281,6 +291,11 @@ void tzc400_enable_filters(void) for (filter = 0U; filter < tzc400.num_filters; filter++) { state = _tzc400_get_gate_keeper(tzc400.base, filter); if (state != 0U) { + /* Filter 0 is special and cannot be disabled. + * So here we allow it being already enabled. */ + if (filter == 0U) { + continue; + } /* * The TZC filter is already configured. Changing the * programmer's view in an active system can cause @@ -302,14 +317,17 @@ void tzc400_enable_filters(void) void tzc400_disable_filters(void) { unsigned int filter; + unsigned int state; + unsigned int start = 0U; assert(tzc400.base != 0U); - /* - * We don't do the same state check as above as the Gatekeepers are - * disabled after reset. - */ - for (filter = 0; filter < tzc400.num_filters; filter++) + /* Filter 0 is special and cannot be disabled. */ + state = _tzc400_get_gate_keeper(tzc400.base, 0); + if (state != 0U) { + start++; + } + for (filter = start; filter < tzc400.num_filters; filter++) _tzc400_set_gate_keeper(tzc400.base, filter, 0); } |