Refactor fsp-rtc.c to not call fsp_sync_msg (and thus pollers) with lock held

We introduce simple state machine, have liberal assert()s and very
clearly indicate what's protected by the lock (everything).

We also stop waiting for the initial RTC response on boot, which
will ever so slightly speed up booting.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/include/fsp.h b/include/fsp.h
index b65ef98..b796bfb 100644
--- a/include/fsp.h
+++ b/include/fsp.h
@@ -617,6 +617,15 @@ static inline bool fsp_msg_busy(struct fsp_msg *msg)
 	return true;
 }
 
+static inline u32 fsp_msg_cmd(const struct fsp_msg *msg)
+{
+	u32 cmd_sub_mod;
+	cmd_sub_mod = (msg->word0 & 0xff) << 16;
+	cmd_sub_mod |= (msg->word1 & 0xff) << 8;
+	cmd_sub_mod |= (msg->word1 & 0xff00) >> 8;
+	return cmd_sub_mod;
+}
+
 /* Initialize the FSP mailbox driver */
 extern void fsp_init(void);