diff options
Diffstat (limited to 'drivers/arm/gic/v2/gicv2_main.c')
-rw-r--r-- | drivers/arm/gic/v2/gicv2_main.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/arm/gic/v2/gicv2_main.c b/drivers/arm/gic/v2/gicv2_main.c index eab4c3bf..59b66323 100644 --- a/drivers/arm/gic/v2/gicv2_main.c +++ b/drivers/arm/gic/v2/gicv2_main.c @@ -476,3 +476,27 @@ void gicv2_set_interrupt_pending(unsigned int id) dsbishst(); gicd_set_ispendr(driver_data->gicd_base, id); } + +/******************************************************************************* + * This function sets the PMR register with the supplied value. Returns the + * original PMR. + ******************************************************************************/ +unsigned int gicv2_set_pmr(unsigned int mask) +{ + unsigned int old_mask; + + assert(driver_data); + assert(driver_data->gicc_base); + + old_mask = gicc_read_pmr(driver_data->gicc_base); + + /* + * Order memory updates w.r.t. PMR write, and ensure they're visible + * before potential out of band interrupt trigger because of PMR update. + */ + dmbishst(); + gicc_write_pmr(driver_data->gicc_base, mask); + dsbishst(); + + return old_mask; +} |