GIC: Add helpers to set interrupt configuration
The helpers perform read-modify-write on GIC*_ICFGR registers, but don't
serialise callers. Any serialisation must be taken care of by the
callers.
Change-Id: I71995f82ff2c7f70d37af0ede30d6ee18682fd3f
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
diff --git a/drivers/arm/gic/common/gic_common.c b/drivers/arm/gic/common/gic_common.c
index 71155a9..d523772 100644
--- a/drivers/arm/gic/common/gic_common.c
+++ b/drivers/arm/gic/common/gic_common.c
@@ -299,3 +299,15 @@
{
mmio_write_8(base + GICD_IPRIORITYR + id, pri & GIC_PRI_MASK);
}
+
+void gicd_set_icfgr(uintptr_t base, unsigned int id, unsigned int cfg)
+{
+ unsigned bit_num = id & ((1 << ICFGR_SHIFT) - 1);
+ uint32_t reg_val = gicd_read_icfgr(base, id);
+
+ /* Clear the field, and insert required configuration */
+ reg_val &= ~(GIC_CFG_MASK << bit_num);
+ reg_val |= ((cfg & GIC_CFG_MASK) << bit_num);
+
+ gicd_write_icfgr(base, id, reg_val);
+}