[PATCH v4 03/16] lib: sbi: Configure PMP late in coldboot and warmboot path

[Anup Patel]

We factor-out PMP configuration from sbi_hart_init() as a separate
sbi_hart_pmp_configure() function and do the PMP configuration very
late in coldboot and warmboot path just before platform_final_init().

Eventually, this enable us to configure PMP totally based on OpenSBI
domain where OpenSBI domains can be parsed from device-tree in any of
the platform operations except platform_final_init().

Signed-off-by: Anup Patel <anup.patel at wdc.com>
Reviewed-by: Atish Patra <atish.patra at wdc.com>
Reviewed-by: Alistair Francis <alistair.francis at wdc.com>
---
 include/sbi/sbi_hart.h | 1 +
 lib/sbi/sbi_hart.c     | 4 ++--
 lib/sbi/sbi_init.c     | 8 ++++++++
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h
index 0ba68f0..9207f4c 100644
--- a/include/sbi/sbi_hart.h
+++ b/include/sbi/sbi_hart.h
@@ -45,6 +45,7 @@ void sbi_hart_pmp_dump(struct sbi_scratch *scratch);
 int  sbi_hart_pmp_check_addr(struct sbi_scratch *scratch,
 			     unsigned long daddr, unsigned long mode,
 			     unsigned long attr);
+int sbi_hart_pmp_configure(struct sbi_scratch *scratch);
 bool sbi_hart_has_feature(struct sbi_scratch *scratch, unsigned long feature);
 void sbi_hart_get_features_str(struct sbi_scratch *scratch,
 			       char *features_str, int nfstr);
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
index edf79b7..7244f1c 100644
--- a/lib/sbi/sbi_hart.c
+++ b/lib/sbi/sbi_hart.c
@@ -224,7 +224,7 @@ int sbi_hart_pmp_check_addr(struct sbi_scratch *scratch,
 	return SBI_OK;
 }
 
-static int pmp_init(struct sbi_scratch *scratch, u32 hartid)
+int sbi_hart_pmp_configure(struct sbi_scratch *scratch)
 {
 	u32 pmp_idx = 0;
 	unsigned long fw_start, fw_size_log2;
@@ -462,7 +462,7 @@ int sbi_hart_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot)
 	if (rc)
 		return rc;
 
-	return pmp_init(scratch, hartid);
+	return 0;
 }
 
 void __attribute__((noreturn)) sbi_hart_hang(void)
diff --git a/lib/sbi/sbi_init.c b/lib/sbi/sbi_init.c
index 65d81ba..85a5f13 100644
--- a/lib/sbi/sbi_init.c
+++ b/lib/sbi/sbi_init.c
@@ -210,6 +210,10 @@ static void __noreturn init_coldboot(struct sbi_scratch *scratch, u32 hartid)
 	if (rc)
 		sbi_hart_hang();
 
+	rc = sbi_hart_pmp_configure(scratch);
+	if (rc)
+		sbi_hart_hang();
+
 	rc = sbi_platform_final_init(plat, TRUE);
 	if (rc)
 		sbi_hart_hang();
@@ -266,6 +270,10 @@ static void __noreturn init_warmboot(struct sbi_scratch *scratch, u32 hartid)
 	if (rc)
 		sbi_hart_hang();
 
+	rc = sbi_hart_pmp_configure(scratch);
+	if (rc)
+		sbi_hart_hang();
+
 	rc = sbi_platform_final_init(plat, FALSE);
 	if (rc)
 		sbi_hart_hang();
-- 
2.25.1