From 904ca21a00245968c26ac94dd38cb6a65fadc2b5 Mon Sep 17 00:00:00 2001
From: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
Date: Mon, 27 Jun 2022 16:45:44 +0800
Subject: [PATCH] syslog & ramlog: add BOARDIOC_RESET_CAUSE for syslog & ramlog

cold boot should clear syslog & ramlog buffer

Signed-off-by: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
Signed-off-by: ligd <liguiding1@xiaomi.com>
---
 drivers/syslog/ramlog.c       | 16 ++++++++++++++++
 drivers/syslog/syslog_rpmsg.c | 15 +++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/drivers/syslog/ramlog.c b/drivers/syslog/ramlog.c
index 38c5c5392b..cf35bf9740 100644
--- a/drivers/syslog/ramlog.c
+++ b/drivers/syslog/ramlog.c
@@ -38,6 +38,7 @@
 #include <assert.h>
 #include <debug.h>
 #include <ctype.h>
+#include <sys/boardctl.h>
 
 #include <nuttx/arch.h>
 #include <nuttx/kmalloc.h>
@@ -224,6 +225,10 @@ static void ramlog_pollnotify(FAR struct ramlog_dev_s *priv,
 static void ramlog_initbuf(void)
 {
   FAR struct ramlog_dev_s *priv = &g_sysdev;
+#ifdef CONFIG_BOARDCTL_RESET_CAUSE
+  struct boardioc_reset_cause_s cause;
+  int ret;
+#endif
   bool is_empty = true;
   char prev;
   char cur;
@@ -235,6 +240,17 @@ static void ramlog_initbuf(void)
       return;
     }
 
+#ifdef CONFIG_BOARDCTL_RESET_CAUSE
+  memset(&cause, 0, sizeof(cause));
+  ret = boardctl(BOARDIOC_RESET_CAUSE, (uintptr_t)&cause);
+  if (ret >= 0 && cause.cause == BOARDIOC_RESETCAUSE_SYS_CHIPPOR)
+    {
+      memset(priv->rl_buffer, 0, priv->rl_bufsize);
+      priv->rl_head = priv->rl_tail = 0;
+      return;
+    }
+#endif
+
   prev = priv->rl_buffer[priv->rl_bufsize - 1];
 
   for (i = 0; i < priv->rl_bufsize; i++)
diff --git a/drivers/syslog/syslog_rpmsg.c b/drivers/syslog/syslog_rpmsg.c
index 80bc27a2a1..9d5dbac102 100644
--- a/drivers/syslog/syslog_rpmsg.c
+++ b/drivers/syslog/syslog_rpmsg.c
@@ -28,6 +28,7 @@
 #include <ctype.h>
 #include <errno.h>
 #include <string.h>
+#include <sys/boardctl.h>
 
 #ifdef CONFIG_ARCH_LOWPUTC
 #include <nuttx/arch.h>
@@ -387,6 +388,10 @@ ssize_t syslog_rpmsg_write(FAR struct syslog_channel_s *channel,
 void syslog_rpmsg_init_early(FAR void *buffer, size_t size)
 {
   FAR struct syslog_rpmsg_s *priv = &g_syslog_rpmsg;
+#ifdef CONFIG_BOARDCTL_RESET_CAUSE
+  struct boardioc_reset_cause_s cause;
+  int ret;
+#endif
   char prev;
   char cur;
   size_t i;
@@ -396,6 +401,16 @@ void syslog_rpmsg_init_early(FAR void *buffer, size_t size)
   priv->buffer = buffer;
   priv->size   = size;
 
+#ifdef CONFIG_BOARDCTL_RESET_CAUSE
+  memset(&cause, 0, sizeof(cause));
+  ret = boardctl(BOARDIOC_RESET_CAUSE, (uintptr_t)&cause);
+  if (ret >= 0 && cause.cause == BOARDIOC_RESETCAUSE_SYS_CHIPPOR)
+    {
+      memset(buffer, 0, size);
+      return;
+    }
+#endif
+
   prev = priv->buffer[size - 1];
 
   for (i = 0; i < size; i++)