lib: irqchip/plic: Add context save/restore helpers

These can be used by platform code to save the PLIC context state, if
it would otherwise be lost during non-retentive suspend. The platform
is responsible for allocating all necessary storage.

Reviewed-by: Anup Patel <[email protected]>
Signed-off-by: Samuel Holland <[email protected]>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/sbi_utils/irqchip/plic.h b/include/sbi_utils/irqchip/plic.h
index 8f21af64..21b22661 100644
--- a/include/sbi_utils/irqchip/plic.h
+++ b/include/sbi_utils/irqchip/plic.h
@@ -17,6 +17,12 @@ struct plic_data {
 	unsigned long num_src;
 };
 
+void plic_context_save(const struct plic_data *plic, int context_id,
+		       u32 *enable, u32 *threshold);
+
+void plic_context_restore(const struct plic_data *plic, int context_id,
+			  const u32 *enable, u32 threshold);
+
 int plic_context_init(const struct plic_data *plic, int context_id,
 		      bool enable, u32 threshold);