diff options
Diffstat (limited to 'drivers/arm/gic/v3/gicv3_main.c')
| -rw-r--r-- | drivers/arm/gic/v3/gicv3_main.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/drivers/arm/gic/v3/gicv3_main.c b/drivers/arm/gic/v3/gicv3_main.c index d0ecab61..04b47129 100644 --- a/drivers/arm/gic/v3/gicv3_main.c +++ b/drivers/arm/gic/v3/gicv3_main.c @@ -9,12 +9,20 @@ #include <assert.h> #include <debug.h> #include <gicv3.h> +#include <spinlock.h> #include "gicv3_private.h" const gicv3_driver_data_t *gicv3_driver_data; static unsigned int gicv2_compat; /* + * Spinlock to guard registers needing read-modify-write. APIs protected by this + * spinlock are used either at boot time (when only a single CPU is active), or + * when the system is fully coherent. + */ +spinlock_t gic_lock; + +/* * Redistributor power operations are weakly bound so that they can be * overridden */ @@ -892,3 +900,63 @@ void gicv3_set_interrupt_priority(unsigned int id, unsigned int proc_num, gicd_set_ipriorityr(gicv3_driver_data->gicd_base, id, priority); } } + +/******************************************************************************* + * This function assigns group for the interrupt identified by id. The proc_num + * is used if the interrupt is SGI or PPI, and programs the corresponding + * Redistributor interface. The group can be any of GICV3_INTR_GROUP* + ******************************************************************************/ +void gicv3_set_interrupt_type(unsigned int id, unsigned int proc_num, + unsigned int type) +{ + unsigned int igroup = 0, grpmod = 0; + uintptr_t gicr_base; + + assert(gicv3_driver_data); + assert(gicv3_driver_data->gicd_base); + assert(proc_num < gicv3_driver_data->rdistif_num); + assert(gicv3_driver_data->rdistif_base_addrs); + + switch (type) { + case INTR_GROUP1S: + igroup = 0; + grpmod = 1; + break; + case INTR_GROUP0: + igroup = 0; + grpmod = 0; + break; + case INTR_GROUP1NS: + igroup = 1; + grpmod = 0; + break; + default: + assert(0); + } + + if (id < MIN_SPI_ID) { + gicr_base = gicv3_driver_data->rdistif_base_addrs[proc_num]; + if (igroup) + gicr_set_igroupr0(gicr_base, id); + else + gicr_clr_igroupr0(gicr_base, id); + + if (grpmod) + gicr_set_igrpmodr0(gicr_base, id); + else + gicr_clr_igrpmodr0(gicr_base, id); + } else { + /* Serialize read-modify-write to Distributor registers */ + spin_lock(&gic_lock); + if (igroup) + gicd_set_igroupr(gicv3_driver_data->gicd_base, id); + else + gicd_clr_igroupr(gicv3_driver_data->gicd_base, id); + + if (grpmod) + gicd_set_igrpmodr(gicv3_driver_data->gicd_base, id); + else + gicd_clr_igrpmodr(gicv3_driver_data->gicd_base, id); + spin_unlock(&gic_lock); + } +} |