From 8d1e5ffe355b0e0bbb60fa88d306304a1746bc8c Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Sun, 7 Jul 2024 21:56:41 -0400
Subject: kernel/amd64: Add serial debug logging

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/kern/init_main.c   | 3 +++
 sys/kern/kern_syslog.c | 9 +++++++++
 2 files changed, 12 insertions(+)

(limited to 'sys/kern')

diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c
index 02e8705..71763b3 100644
--- a/sys/kern/init_main.c
+++ b/sys/kern/init_main.c
@@ -60,6 +60,9 @@ start_init(void)
 int
 main(void)
 {
+    /* Setup serial driver */
+    serial_init();
+
     /* Startup the console */
     cons_init();
     kprintf("Starting Hyra/%s v%s: %s\n", HYRA_ARCH, HYRA_VERSION,
diff --git a/sys/kern/kern_syslog.c b/sys/kern/kern_syslog.c
index 6962a69..7f66db0 100644
--- a/sys/kern/kern_syslog.c
+++ b/sys/kern/kern_syslog.c
@@ -34,6 +34,12 @@
 #include <stdarg.h>
 #include <string.h>
 
+#if defined(__SERIAL_DEBUG)
+#define SERIAL_DEBUG __SERIAL_DEBUG
+#else
+#define SERIAL_DEBUG 0
+#endif
+
 /* Global logger lock */
 static struct spinlock lock = {0};
 
@@ -44,6 +50,9 @@ syslog_write(const char *s, size_t len)
 
     while (len--) {
         cons_putch(&g_root_scr, *p);
+        if (SERIAL_DEBUG) {
+            serial_putc(*p);
+        }
         ++p;
     }
 }
-- 
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