On 12 August 2013 20:44, Aurelien Jarno <aurel...@aurel32.net> wrote: > 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. > > Signed-off-by: Aurelien Jarno <aurel...@aurel32.net> > ---
<snip> > @@ -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, 0x1fffffff); Out of interest, any particular reason not to put this in hw/mips/gt64xxx_pci.c? As far as I can tell from your description it's specific to the GT-64* system controller rather than the malta board? Cheers James
