From 5885cb0a19b06388222f2945d78963377e584ecc Mon Sep 17 00:00:00 2001
From: Lizzy Fleckenstein <lizzy@vlhl.dev>
Date: Thu, 21 Dec 2023 06:36:28 +0100
Subject: add QEMU shutdown command

---
 stage3/shell.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'stage3/shell.c')

diff --git a/stage3/shell.c b/stage3/shell.c
index d67ca57..0f56a04 100644
--- a/stage3/shell.c
+++ b/stage3/shell.c
@@ -6,6 +6,7 @@
 #include "string.h"
 #include "pci.h"
 #include "memory.h"
+#include "io.h"
 
 static void cmd_echo(str arg)
 {
@@ -228,6 +229,15 @@ static void cmd_ls(str arg)
 		free(d.data);
 }
 
+void cmd_shutdown(str arg)
+{
+	(void) arg;
+
+	// this only works in QEMU currently
+	// TODO: use ACPI to make this portable
+	outw(0x604, 0x2000);
+}
+
 typedef struct {
 	str name;
 	void (*fn)(str arg);
@@ -246,6 +256,7 @@ static command registry[] = {
 	{ S("love"),     &cmd_love     },
 	{ S("uname"),    &cmd_uname    },
 	{ S("ls"),       &cmd_ls       },
+	{ S("shutdown"), &cmd_shutdown },
 };
 
 void shell_run_cmd(str cmd)
-- 
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