diff options
Diffstat (limited to 'drivers/arm/gic/v3/gicv3_main.c')
-rw-r--r-- | drivers/arm/gic/v3/gicv3_main.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/arm/gic/v3/gicv3_main.c b/drivers/arm/gic/v3/gicv3_main.c index 43dd77f1..0f50f6d7 100644 --- a/drivers/arm/gic/v3/gicv3_main.c +++ b/drivers/arm/gic/v3/gicv3_main.c @@ -1089,3 +1089,25 @@ void gicv3_set_interrupt_pending(unsigned int id, unsigned int proc_num) gicd_set_ispendr(gicv3_driver_data->gicd_base, id); } } + +/******************************************************************************* + * This function sets the PMR register with the supplied value. Returns the + * original PMR. + ******************************************************************************/ +unsigned int gicv3_set_pmr(unsigned int mask) +{ + unsigned int old_mask; + + old_mask = read_icc_pmr_el1(); + + /* + * Order memory updates w.r.t. PMR write, and ensure they're visible + * before potential out of band interrupt trigger because of PMR update. + * PMR system register writes are self-synchronizing, so no ISB required + * thereafter. + */ + dsbishst(); + write_icc_pmr_el1(mask); + + return old_mask; +} |