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authorAurelien Jarno <aurelien@aurel32.net>2013-08-12 21:34:53 +0200
committerAurelien Jarno <aurelien@aurel32.net>2013-08-14 16:47:30 +0200
commitcc413a39355ed910f22f8f0be5e233c08a0773a0 (patch)
tree211a2dc7f171ec93febae7515fe77e4ea4163d8d /hw/mips
parent8b7a5415f9297c1fbae5bff28dcb059d50c1b045 (diff)
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mips_malta: do not raise exceptions when accessing invalid memory
Since commit c658b94f6e8c206c59d02aa6fbac285b86b53d2c, MIPS raises exceptions when accessing invalid memory. This is not the correct behaviour for MIPS Malta Core LV, as the GT-64120A system controller just ignore undecoded access. This feature is used by the Linux kernel to probe for some devices. Emulate the correct behaviour in QEMU by adding an empty slot covering the entire memory space decoded by the GT-64120A. Tested-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'hw/mips')
-rw-r--r--hw/mips/mips_malta.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
index 0f5de33..f8d064c 100644
--- a/hw/mips/mips_malta.c
+++ b/hw/mips/mips_malta.c
@@ -50,6 +50,7 @@
#include "qemu/host-utils.h"
#include "sysemu/qtest.h"
#include "qemu/error-report.h"
+#include "hw/empty_slot.h"
//#define DEBUG_BOARD_INIT
@@ -908,6 +909,11 @@ void mips_malta_init(QEMUMachineInitArgs *args)
DeviceState *dev = qdev_create(NULL, TYPE_MIPS_MALTA);
MaltaState *s = MIPS_MALTA(dev);
+ /* The whole address space decoded by the GT-64120A doesn't generate
+ exception when accessing invalid memory. Create an empty slot to
+ emulate this feature. */
+ empty_slot_init(0, 0x20000000);
+
qdev_init_nofail(dev);
/* Make sure the first 3 serial ports are associated with a device. */