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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/x86/realmode/rm/wakemain.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/x86/realmode/rm/wakemain.c')
-rw-r--r--kernel/arch/x86/realmode/rm/wakemain.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/kernel/arch/x86/realmode/rm/wakemain.c b/kernel/arch/x86/realmode/rm/wakemain.c
new file mode 100644
index 000000000..91405d515
--- /dev/null
+++ b/kernel/arch/x86/realmode/rm/wakemain.c
@@ -0,0 +1,82 @@
+#include "wakeup.h"
+#include "boot.h"
+
+static void udelay(int loops)
+{
+ while (loops--)
+ io_delay(); /* Approximately 1 us */
+}
+
+static void beep(unsigned int hz)
+{
+ u8 enable;
+
+ if (!hz) {
+ enable = 0x00; /* Turn off speaker */
+ } else {
+ u16 div = 1193181/hz;
+
+ outb(0xb6, 0x43); /* Ctr 2, squarewave, load, binary */
+ io_delay();
+ outb(div, 0x42); /* LSB of counter */
+ io_delay();
+ outb(div >> 8, 0x42); /* MSB of counter */
+ io_delay();
+
+ enable = 0x03; /* Turn on speaker */
+ }
+ inb(0x61); /* Dummy read of System Control Port B */
+ io_delay();
+ outb(enable, 0x61); /* Enable timer 2 output to speaker */
+ io_delay();
+}
+
+#define DOT_HZ 880
+#define DASH_HZ 587
+#define US_PER_DOT 125000
+
+/* Okay, this is totally silly, but it's kind of fun. */
+static void send_morse(const char *pattern)
+{
+ char s;
+
+ while ((s = *pattern++)) {
+ switch (s) {
+ case '.':
+ beep(DOT_HZ);
+ udelay(US_PER_DOT);
+ beep(0);
+ udelay(US_PER_DOT);
+ break;
+ case '-':
+ beep(DASH_HZ);
+ udelay(US_PER_DOT * 3);
+ beep(0);
+ udelay(US_PER_DOT);
+ break;
+ default: /* Assume it's a space */
+ udelay(US_PER_DOT * 3);
+ break;
+ }
+ }
+}
+
+void main(void)
+{
+ /* Kill machine if structures are wrong */
+ if (wakeup_header.real_magic != 0x12345678)
+ while (1)
+ ;
+
+ if (wakeup_header.realmode_flags & 4)
+ send_morse("...-");
+
+ if (wakeup_header.realmode_flags & 1)
+ asm volatile("lcallw $0xc000,$3");
+
+ if (wakeup_header.realmode_flags & 2) {
+ /* Need to call BIOS */
+ probe_cards(0);
+ set_mode(wakeup_header.video_mode);
+ }
+}