[SeaBIOS] [PATCH] Use dedicated HVM debug io port for Xen
Julian Pidancet
julian.pidancet at gmail.com
Sat Nov 5 03:43:04 CET 2011
When running on Xen, use Xen debug io port as debug output instead
of Bochs one.
Signed-off-by: Julian Pidancet <julian.pidancet at gmail.com>
---
src/output.c | 9 +++++++--
src/xen.h | 2 ++
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/src/output.c b/src/output.c
index 462ffb7..78541a4 100644
--- a/src/output.c
+++ b/src/output.c
@@ -11,6 +11,7 @@
#include "bregs.h" // struct bregs
#include "config.h" // CONFIG_*
#include "biosvar.h" // GET_GLOBAL
+#include "xen.h" // PORT_XEN_DEBUG
struct putcinfo {
void (*func)(struct putcinfo *info, char c);
@@ -75,9 +76,13 @@ putc_debug(struct putcinfo *action, char c)
{
if (! CONFIG_DEBUG_LEVEL)
return;
- if (! CONFIG_COREBOOT)
+ if (! CONFIG_COREBOOT) {
// Send character to debug port.
- outb(c, PORT_BIOS_DEBUG);
+ if (CONFIG_XEN)
+ outb(c, PORT_XEN_DEBUG);
+ else
+ outb(c, PORT_BIOS_DEBUG);
+ }
if (c == '\n')
debug_serial('\r');
debug_serial(c);
diff --git a/src/xen.h b/src/xen.h
index 0ed1e9f..802fee0 100644
--- a/src/xen.h
+++ b/src/xen.h
@@ -3,6 +3,8 @@
#include "util.h"
+#define PORT_XEN_DEBUG 0xe9
+
extern u32 xen_cpuid_base;
void xen_probe(void);
--
Julian Pidancet
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