lib: irqchip/plic: Constify plic_data pointers

None of the functions modify the passed-in plic_data, so mark it const.

Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>

2 files changed, 11 insertions, 9 deletions

diff --git a/include/sbi_utils/irqchip/plic.h b/include/sbi_utils/irqchip/plic.h
index 0e56d80..50be5df 100644
--- a/include/sbi_utils/irqchip/plic.h
+++ b/include/sbi_utils/irqchip/plic.h
@@ -17,13 +17,14 @@ struct plic_data {
 	unsigned long num_src;
 };
 
-int plic_warm_irqchip_init(struct plic_data *plic,
+int plic_warm_irqchip_init(const struct plic_data *plic,
 			   int m_cntx_id, int s_cntx_id);
 
-int plic_cold_irqchip_init(struct plic_data *plic);
+int plic_cold_irqchip_init(const struct plic_data *plic);
 
-void plic_set_thresh(struct plic_data *plic, u32 cntxid, u32 val);
+void plic_set_thresh(const struct plic_data *plic, u32 cntxid, u32 val);
 
-void plic_set_ie(struct plic_data *plic, u32 cntxid, u32 word_index, u32 val);
+void plic_set_ie(const struct plic_data *plic, u32 cntxid,
+		 u32 word_index, u32 val);
 
 #endif
diff --git a/lib/utils/irqchip/plic.c b/lib/utils/irqchip/plic.c
index 0f58f3e..4c334ec 100644
--- a/lib/utils/irqchip/plic.c
+++ b/lib/utils/irqchip/plic.c
@@ -21,14 +21,14 @@
 #define PLIC_CONTEXT_BASE 0x200000
 #define PLIC_CONTEXT_STRIDE 0x1000
 
-static void plic_set_priority(struct plic_data *plic, u32 source, u32 val)
+static void plic_set_priority(const struct plic_data *plic, u32 source, u32 val)
 {
 	volatile void *plic_priority = (char *)plic->addr +
 			PLIC_PRIORITY_BASE + 4 * source;
 	writel(val, plic_priority);
 }
 
-void plic_set_thresh(struct plic_data *plic, u32 cntxid, u32 val)
+void plic_set_thresh(const struct plic_data *plic, u32 cntxid, u32 val)
 {
 	volatile void *plic_thresh;
 
@@ -40,7 +40,8 @@ void plic_set_thresh(struct plic_data *plic, u32 cntxid, u32 val)
 	writel(val, plic_thresh);
 }
 
-void plic_set_ie(struct plic_data *plic, u32 cntxid, u32 word_index, u32 val)
+void plic_set_ie(const struct plic_data *plic, u32 cntxid,
+		 u32 word_index, u32 val)
 {
 	volatile char *plic_ie;
 
@@ -52,7 +53,7 @@ void plic_set_ie(struct plic_data *plic, u32 cntxid, u32 word_index, u32 val)
 	writel(val, plic_ie + word_index * 4);
 }
 
-int plic_warm_irqchip_init(struct plic_data *plic,
+int plic_warm_irqchip_init(const struct plic_data *plic,
 			   int m_cntx_id, int s_cntx_id)
 {
 	size_t i, ie_words;
@@ -85,7 +86,7 @@ int plic_warm_irqchip_init(struct plic_data *plic,
 	return 0;
 }
 
-int plic_cold_irqchip_init(struct plic_data *plic)
+int plic_cold_irqchip_init(const struct plic_data *plic)
 {
 	int i;