This helper function enables the signaling of LPIs by the
redistributor to the connected PE.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
lib/arm/asm/gic-v3-its.h | 1 +
lib/arm/gic-v3-its.c | 15 +++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h
index 21054cb..3e36a2a 100644
--- a/lib/arm/asm/gic-v3-its.h
+++ b/lib/arm/asm/gic-v3-its.h
@@ -145,6 +145,7 @@ extern struct its_data its_data;
extern int its_parse_baser(int i, struct its_baser *baser);
extern void its_setup_baser(int i, struct its_baser *baser);
+extern void enable_lpi(u32 redist);
#endif /* !__ASSEMBLY__ */
diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c
index f577d5f..7c768a5 100644
--- a/lib/arm/gic-v3-its.c
+++ b/lib/arm/gic-v3-its.c
@@ -171,3 +171,18 @@ void init_cmd_queue(void)
writeq(0, its_data.base + GITS_CWRITER);
writeq(0, its_data.base + GITS_CREADR);
}
+
+void enable_lpi(u32 redist)
+{
+ void *ptr;
+ u64 val;
+
+ if (redist >= gicv3_data.cpu_count)
+ report_abort("%s redist=%d >= cpu_count=%d\n",
+ __func__, redist, gicv3_data.cpu_count);
+
+ ptr = gicv3_data.redist_base[redist];
+ val = readl(ptr + GICR_CTLR);
+ val |= GICR_CTLR_ENABLE_LPIS;
+ writel(val, ptr + GICR_CTLR);
+}
--
2.5.5
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