Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / x86 / lib / pcat_timer.c

diff --git a/qemu/roms/u-boot/arch/x86/lib/pcat_timer.c b/qemu/roms/u-boot/arch/x86/lib/pcat_timer.c
new file mode 100644 (file)
index 0000000..3545a50
--- /dev/null
+++ b/qemu/roms/u-boot/arch/x86/lib/pcat_timer.c
@@ -0,0 +1,27 @@
+/*
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/i8254.h>
+
+#define TIMER2_VALUE 0x0a8e /* 440Hz */
+
+int pcat_timer_init(void)
+{
+       /*
+        * initialize 2, used to drive the speaker
+        * (to start a beep: write 3 to port 0x61,
+        * to stop it again: write 0)
+        */
+       outb(PIT_CMD_CTR2 | PIT_CMD_BOTH | PIT_CMD_MODE3,
+                       PIT_BASE + PIT_COMMAND);
+       outb(TIMER2_VALUE & 0xff, PIT_BASE + PIT_T2);
+       outb(TIMER2_VALUE >> 8, PIT_BASE + PIT_T2);
+
+       return 0;
+}