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/arch/amd64/amd64/machdep.c | 14 ++++++++++++++
sys/arch/amd64/conf/GENERIC | 1 +
2 files changed, 15 insertions(+)
(limited to 'sys/arch/amd64')
diff --git a/sys/arch/amd64/amd64/machdep.c b/sys/arch/amd64/amd64/machdep.c
index b047dd8..03b10f0 100644
--- a/sys/arch/amd64/amd64/machdep.c
+++ b/sys/arch/amd64/amd64/machdep.c
@@ -28,6 +28,7 @@
*/
#include <sys/types.h>
+#include <sys/syslog.h>
#include <machine/cpu.h>
#include <machine/gdt.h>
#include <machine/tss.h>
@@ -36,6 +37,7 @@
#include <machine/asm.h>
#include <machine/cpuid.h>
#include <machine/lapic.h>
+#include <machine/uart.h>
#if defined(__SPECTRE_IBRS)
#define SPECTRE_IBRS __SPECTRE_IBRS
@@ -90,6 +92,18 @@ try_mitigate_spectre(void)
ibrs_enable();
}
+void
+serial_init(void)
+{
+ uart_init();
+}
+
+void
+serial_putc(char c)
+{
+ uart_write(c);
+}
+
/*
* Get the descriptor for the currently
* running processor.
diff --git a/sys/arch/amd64/conf/GENERIC b/sys/arch/amd64/conf/GENERIC
index a7bbc81..19c9a62 100644
--- a/sys/arch/amd64/conf/GENERIC
+++ b/sys/arch/amd64/conf/GENERIC
@@ -1,5 +1,6 @@
// Kernel options
option SPECTRE_IBRS no
+option SERIAL_DEBUG yes
// Kernel constants
setval SCHED_NQUEUE 4
--
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