vas: Define vas_get_hvwc_mmio_bar interface

The nest accelerator (NX) will need this interface to initialize its
UMAC MMIO BAR.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/core/vas.c b/core/vas.c
index 9fd7521..988662c 100644
--- a/core/vas.c
+++ b/core/vas.c
@@ -69,6 +69,19 @@ static int vas_scom_write(struct proc_chip *chip, uint64_t reg, uint64_t val)
 	return rc;
 }
 
+/* Interface for NX - make sure VAS is fully initialized first */
+__attrconst inline uint64_t vas_get_hvwc_mmio_bar(const int chipid)
+{
+	uint64_t addr;
+
+	if (!vas_initialized)
+		return 0ULL;
+
+	get_hvwc_mmio_bar(chipid, &addr, NULL);
+
+	return addr;
+}
+
 static int init_north_ctl(struct proc_chip *chip)
 {
 	uint64_t val = 0ULL;