diff mbox series

[v2,4/4] hw/display/milkymist-tmu2: Move inlined code from header to source

Message ID 20190124011554.25418-5-philmd@redhat.com
State New
Headers show
Series sdl: Let it be optional (in particular, on OpenBSD) | expand

Commit Message

Philippe Mathieu-Daudé Jan. 24, 2019, 1:15 a.m. UTC
Move the complexity of milkymist_tmu2_create() into the
source file. Doing so we avoid to include the X11/OpenGL
headers in all LM32 devices, and we also avoid the duplicate
declaration of glx_fbconfig_attr[] (it is already declared
in hw/display/milkymist-tmu2.c).
Since TYPE_MILKYMIST_TMU2 is now accessible, use it.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 MAINTAINERS                         |  1 +
 hw/display/milkymist-tmu2.c         | 49 ++++++++++++++++++++++
 hw/lm32/milkymist-hw.h              | 63 -----------------------------
 hw/lm32/milkymist.c                 |  1 +
 include/hw/display/milkymist_tmu2.h | 41 +++++++++++++++++++
 5 files changed, 92 insertions(+), 63 deletions(-)
 create mode 100644 include/hw/display/milkymist_tmu2.h

Comments

Gerd Hoffmann Jan. 24, 2019, 11:43 a.m. UTC | #1
On Thu, Jan 24, 2019 at 02:15:54AM +0100, Philippe Mathieu-Daudé wrote:
> Move the complexity of milkymist_tmu2_create() into the
> source file. Doing so we avoid to include the X11/OpenGL
> headers in all LM32 devices, and we also avoid the duplicate
> declaration of glx_fbconfig_attr[] (it is already declared
> in hw/display/milkymist-tmu2.c).
> Since TYPE_MILKYMIST_TMU2 is now accessible, use it.

Oops, fails the build:

  LINK    lm32-softmmu/qemu-system-lm32
hw/lm32/milkymist.o: In function `milkymist_init':
milkymist.c:(.text+0xb0f): undefined reference to `milkymist_tmu2_create'

cheers,
  Gerd
Philippe Mathieu-Daudé Jan. 24, 2019, 1:37 p.m. UTC | #2
On 1/24/19 12:43 PM, Gerd Hoffmann wrote:
> On Thu, Jan 24, 2019 at 02:15:54AM +0100, Philippe Mathieu-Daudé wrote:
>> Move the complexity of milkymist_tmu2_create() into the
>> source file. Doing so we avoid to include the X11/OpenGL
>> headers in all LM32 devices, and we also avoid the duplicate
>> declaration of glx_fbconfig_attr[] (it is already declared
>> in hw/display/milkymist-tmu2.c).
>> Since TYPE_MILKYMIST_TMU2 is now accessible, use it.
> 
> Oops, fails the build:
> 
>   LINK    lm32-softmmu/qemu-system-lm32
> hw/lm32/milkymist.o: In function `milkymist_init':
> milkymist.c:(.text+0xb0f): undefined reference to `milkymist_tmu2_create'

Funny, I was busy testing your other audio series while you were testing
mine :)

I'll have a look, thanks.

Phil.
Philippe Mathieu-Daudé Jan. 28, 2019, 5:47 p.m. UTC | #3
Cc'ing Thomas/Paolo for Makefile rules...

On 1/24/19 12:43 PM, Gerd Hoffmann wrote:
> On Thu, Jan 24, 2019 at 02:15:54AM +0100, Philippe Mathieu-Daudé wrote:
>> Move the complexity of milkymist_tmu2_create() into the
>> source file. Doing so we avoid to include the X11/OpenGL
>> headers in all LM32 devices, and we also avoid the duplicate
>> declaration of glx_fbconfig_attr[] (it is already declared
>> in hw/display/milkymist-tmu2.c).
>> Since TYPE_MILKYMIST_TMU2 is now accessible, use it.
> 
> Oops, fails the build:
> 
>   LINK    lm32-softmmu/qemu-system-lm32
> hw/lm32/milkymist.o: In function `milkymist_init':
> milkymist.c:(.text+0xb0f): undefined reference to `milkymist_tmu2_create'

The problem comes from patch #2:

> diff --git a/default-configs/lm32-softmmu.mak
b/default-configs/lm32-softmmu.mak
> index 4889348a10..4049b23562 100644
> --- a/default-configs/lm32-softmmu.mak
> +++ b/default-configs/lm32-softmmu.mak
> @@ -2,7 +2,7 @@
>
>  CONFIG_LM32=y
>  CONFIG_MILKYMIST=y
> -CONFIG_MILKYMIST_TMU2=$(CONFIG_OPENGL)
> +CONFIG_MILKYMIST_TMU2=$(call land,$(CONFIG_X11),$(CONFIG_OPENGL))
>  CONFIG_FRAMEBUFFER=y
>  CONFIG_PTIMER=y
>  CONFIG_PFLASH_CFI01=y
> diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs
> index 97acd5b6cb..079e702f25 100644
> --- a/hw/display/Makefile.objs
> +++ b/hw/display/Makefile.objs
> @@ -29,8 +29,8 @@ common-obj-$(CONFIG_MILKYMIST) += milkymist-vgafb.o
>  common-obj-$(CONFIG_ZAURUS) += tc6393xb.o
>
>  common-obj-$(CONFIG_MILKYMIST_TMU2) += milkymist-tmu2.o
> -milkymist-tmu2.o-cflags := $(X11_CFLAGS)
> -milkymist-tmu2.o-libs := $(X11_LIBS)
> +milkymist-tmu2.o-cflags := $(X11_CFLAGS) $(OPENGL_CFLAGS)
> +milkymist-tmu2.o-libs := $(X11_LIBS) $(OPENGL_LIBS)
>
>  obj-$(CONFIG_OMAP) += omap_dss.o
>  obj-$(CONFIG_OMAP) += omap_lcdc.o

Using $(call land) seems to break CONFIG_MILKYMIST_TMU2 availability in
$(common-obj), while it works correctly in the per-target $(obj).
I'm not sure what is the cause, but moving milkymist-tmu2.o to $(obj)
makes more sense and fix this, so I'll go this way.

Regards,

Phil.
Peter Maydell Jan. 28, 2019, 6:02 p.m. UTC | #4
On Mon, 28 Jan 2019 at 17:47, Philippe Mathieu-Daudé <philmd@redhat.com> wrote:
>
> Cc'ing Thomas/Paolo for Makefile rules...
>
> On 1/24/19 12:43 PM, Gerd Hoffmann wrote:
> > Oops, fails the build:
> >
> >   LINK    lm32-softmmu/qemu-system-lm32
> > hw/lm32/milkymist.o: In function `milkymist_init':
> > milkymist.c:(.text+0xb0f): undefined reference to `milkymist_tmu2_create'
>
> The problem comes from patch #2:
>
> > diff --git a/default-configs/lm32-softmmu.mak
> b/default-configs/lm32-softmmu.mak
> > index 4889348a10..4049b23562 100644
> > --- a/default-configs/lm32-softmmu.mak
> > +++ b/default-configs/lm32-softmmu.mak
> > @@ -2,7 +2,7 @@
> >
> >  CONFIG_LM32=y
> >  CONFIG_MILKYMIST=y
> > -CONFIG_MILKYMIST_TMU2=$(CONFIG_OPENGL)
> > +CONFIG_MILKYMIST_TMU2=$(call land,$(CONFIG_X11),$(CONFIG_OPENGL))
> >  CONFIG_FRAMEBUFFER=y
> >  CONFIG_PTIMER=y
> >  CONFIG_PFLASH_CFI01=y
> > diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs
> > index 97acd5b6cb..079e702f25 100644
> > --- a/hw/display/Makefile.objs
> > +++ b/hw/display/Makefile.objs
> > @@ -29,8 +29,8 @@ common-obj-$(CONFIG_MILKYMIST) += milkymist-vgafb.o
> >  common-obj-$(CONFIG_ZAURUS) += tc6393xb.o
> >
> >  common-obj-$(CONFIG_MILKYMIST_TMU2) += milkymist-tmu2.o
> > -milkymist-tmu2.o-cflags := $(X11_CFLAGS)
> > -milkymist-tmu2.o-libs := $(X11_LIBS)
> > +milkymist-tmu2.o-cflags := $(X11_CFLAGS) $(OPENGL_CFLAGS)
> > +milkymist-tmu2.o-libs := $(X11_LIBS) $(OPENGL_LIBS)
> >
> >  obj-$(CONFIG_OMAP) += omap_dss.o
> >  obj-$(CONFIG_OMAP) += omap_lcdc.o
>
> Using $(call land) seems to break CONFIG_MILKYMIST_TMU2 availability in
> $(common-obj), while it works correctly in the per-target $(obj).
> I'm not sure what is the cause, but moving milkymist-tmu2.o to $(obj)
> makes more sense and fix this, so I'll go this way.

Something weird definitely seems to be going on here -- 'call land'
ought not to be broken in this situation.

I don't understand why the build/config-all-devices.mak versions of
the defines of CONFIG_FOO variables are so weird:

CONFIG_ACPI:=$(findstring y,$(CONFIG_ACPI)y)

...are they really intended to be self-referential like that?

The per-target ones in build/foo-softmmu/config-devices.mak are
more like what I expected:

CONFIG_VGA=y

Paolo, git blame says you wrote the makefile rune back in 2013:
I don't suppose you can remember the intent ?

thanks
-- PMM
Philippe Mathieu-Daudé Jan. 28, 2019, 6:28 p.m. UTC | #5
On 1/28/19 7:02 PM, Peter Maydell wrote:
> On Mon, 28 Jan 2019 at 17:47, Philippe Mathieu-Daudé <philmd@redhat.com> wrote:
>>
>> Cc'ing Thomas/Paolo for Makefile rules...
>>
>> On 1/24/19 12:43 PM, Gerd Hoffmann wrote:
>>> Oops, fails the build:
>>>
>>>   LINK    lm32-softmmu/qemu-system-lm32
>>> hw/lm32/milkymist.o: In function `milkymist_init':
>>> milkymist.c:(.text+0xb0f): undefined reference to `milkymist_tmu2_create'
>>
>> The problem comes from patch #2:
>>
>>> diff --git a/default-configs/lm32-softmmu.mak
>> b/default-configs/lm32-softmmu.mak
>>> index 4889348a10..4049b23562 100644
>>> --- a/default-configs/lm32-softmmu.mak
>>> +++ b/default-configs/lm32-softmmu.mak
>>> @@ -2,7 +2,7 @@
>>>
>>>  CONFIG_LM32=y
>>>  CONFIG_MILKYMIST=y
>>> -CONFIG_MILKYMIST_TMU2=$(CONFIG_OPENGL)
>>> +CONFIG_MILKYMIST_TMU2=$(call land,$(CONFIG_X11),$(CONFIG_OPENGL))
>>>  CONFIG_FRAMEBUFFER=y
>>>  CONFIG_PTIMER=y
>>>  CONFIG_PFLASH_CFI01=y
>>> diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs
>>> index 97acd5b6cb..079e702f25 100644
>>> --- a/hw/display/Makefile.objs
>>> +++ b/hw/display/Makefile.objs
>>> @@ -29,8 +29,8 @@ common-obj-$(CONFIG_MILKYMIST) += milkymist-vgafb.o
>>>  common-obj-$(CONFIG_ZAURUS) += tc6393xb.o
>>>
>>>  common-obj-$(CONFIG_MILKYMIST_TMU2) += milkymist-tmu2.o
>>> -milkymist-tmu2.o-cflags := $(X11_CFLAGS)
>>> -milkymist-tmu2.o-libs := $(X11_LIBS)
>>> +milkymist-tmu2.o-cflags := $(X11_CFLAGS) $(OPENGL_CFLAGS)
>>> +milkymist-tmu2.o-libs := $(X11_LIBS) $(OPENGL_LIBS)
>>>
>>>  obj-$(CONFIG_OMAP) += omap_dss.o
>>>  obj-$(CONFIG_OMAP) += omap_lcdc.o
>>
>> Using $(call land) seems to break CONFIG_MILKYMIST_TMU2 availability in
>> $(common-obj), while it works correctly in the per-target $(obj).
>> I'm not sure what is the cause, but moving milkymist-tmu2.o to $(obj)
>> makes more sense and fix this, so I'll go this way.
> 
> Something weird definitely seems to be going on here -- 'call land'
> ought not to be broken in this situation.
> 
> I don't understand why the build/config-all-devices.mak versions of
> the defines of CONFIG_FOO variables are so weird:
> 
> CONFIG_ACPI:=$(findstring y,$(CONFIG_ACPI)y)
> 
> ...are they really intended to be self-referential like that?
> 
> The per-target ones in build/foo-softmmu/config-devices.mak are
> more like what I expected:
> 
> CONFIG_VGA=y
> 
> Paolo, git blame says you wrote the makefile rune back in 2013:
> I don't suppose you can remember the intent ?

Now than Kconfig is in good usable shape, I'm pretty sure Paolo doesn't
want to remember ;) Our time is better worth spent on Kconfig than
fixing those issues.

For this series goal (remove SDL1!) I'll go with moving LM32/Milkymist
devices to $(obj). Hopefully the next patch will be in Kconfig :)
Thomas Huth Jan. 29, 2019, 5:47 a.m. UTC | #6
On 2019-01-28 18:47, Philippe Mathieu-Daudé wrote:
> Cc'ing Thomas/Paolo for Makefile rules...
> 
> On 1/24/19 12:43 PM, Gerd Hoffmann wrote:
>> On Thu, Jan 24, 2019 at 02:15:54AM +0100, Philippe Mathieu-Daudé wrote:
>>> Move the complexity of milkymist_tmu2_create() into the
>>> source file. Doing so we avoid to include the X11/OpenGL
>>> headers in all LM32 devices, and we also avoid the duplicate
>>> declaration of glx_fbconfig_attr[] (it is already declared
>>> in hw/display/milkymist-tmu2.c).
>>> Since TYPE_MILKYMIST_TMU2 is now accessible, use it.
>>
>> Oops, fails the build:
>>
>>   LINK    lm32-softmmu/qemu-system-lm32
>> hw/lm32/milkymist.o: In function `milkymist_init':
>> milkymist.c:(.text+0xb0f): undefined reference to `milkymist_tmu2_create'
> 
> The problem comes from patch #2:
> 
>> diff --git a/default-configs/lm32-softmmu.mak
> b/default-configs/lm32-softmmu.mak
>> index 4889348a10..4049b23562 100644
>> --- a/default-configs/lm32-softmmu.mak
>> +++ b/default-configs/lm32-softmmu.mak
>> @@ -2,7 +2,7 @@
>>
>>  CONFIG_LM32=y
>>  CONFIG_MILKYMIST=y
>> -CONFIG_MILKYMIST_TMU2=$(CONFIG_OPENGL)
>> +CONFIG_MILKYMIST_TMU2=$(call land,$(CONFIG_X11),$(CONFIG_OPENGL))
>>  CONFIG_FRAMEBUFFER=y
>>  CONFIG_PTIMER=y
>>  CONFIG_PFLASH_CFI01=y
>> diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs
>> index 97acd5b6cb..079e702f25 100644
>> --- a/hw/display/Makefile.objs
>> +++ b/hw/display/Makefile.objs
>> @@ -29,8 +29,8 @@ common-obj-$(CONFIG_MILKYMIST) += milkymist-vgafb.o
>>  common-obj-$(CONFIG_ZAURUS) += tc6393xb.o
>>
>>  common-obj-$(CONFIG_MILKYMIST_TMU2) += milkymist-tmu2.o
>> -milkymist-tmu2.o-cflags := $(X11_CFLAGS)
>> -milkymist-tmu2.o-libs := $(X11_LIBS)
>> +milkymist-tmu2.o-cflags := $(X11_CFLAGS) $(OPENGL_CFLAGS)
>> +milkymist-tmu2.o-libs := $(X11_LIBS) $(OPENGL_LIBS)
>>
>>  obj-$(CONFIG_OMAP) += omap_dss.o
>>  obj-$(CONFIG_OMAP) += omap_lcdc.o
> 
> Using $(call land) seems to break CONFIG_MILKYMIST_TMU2 availability in
> $(common-obj), while it works correctly in the per-target $(obj).
> I'm not sure what is the cause, but moving milkymist-tmu2.o to $(obj)
> makes more sense and fix this, so I'll go this way.

You could try whether adding an additional

 common-obj-$(CONFIG_ALL) += milkymist-tmu2.o

fixes the issue for you, too.

OTOH, milkymist is only used by one target, so there is really no reason
that this file should be added to common-obj, thus using $(obj) is fine
here.

 Thomas
Paolo Bonzini Jan. 29, 2019, 8:21 a.m. UTC | #7
On 28/01/19 19:02, Peter Maydell wrote:
> 
> I don't understand why the build/config-all-devices.mak versions of
> the defines of CONFIG_FOO variables are so weird:
> 
> CONFIG_ACPI:=$(findstring y,$(CONFIG_ACPI)y)
> 
> ...are they really intended to be self-referential like that?

Yes, config-all-devices.mak is basically on "OR" of all the
config-devices.mak files.

Are CONFIG_X11 and CONFIG_OPENGL defined at the time
config-all-devices.mak is included?

Paolo
Peter Maydell Jan. 29, 2019, 10:17 a.m. UTC | #8
On Tue, 29 Jan 2019 at 08:21, Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> On 28/01/19 19:02, Peter Maydell wrote:
> >
> > I don't understand why the build/config-all-devices.mak versions of
> > the defines of CONFIG_FOO variables are so weird:
> >
> > CONFIG_ACPI:=$(findstring y,$(CONFIG_ACPI)y)
> >
> > ...are they really intended to be self-referential like that?
>
> Yes, config-all-devices.mak is basically on "OR" of all the
> config-devices.mak files.
>
> Are CONFIG_X11 and CONFIG_OPENGL defined at the time
> config-all-devices.mak is included?

They should be -- they're defined in config-host.mak, which
Makefile includes before config-all-devices.mak.

thanks
-- PMM
diff mbox series

Patch

diff --git a/MAINTAINERS b/MAINTAINERS
index af339b86db..3c040f21e7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -185,6 +185,7 @@  F: disas/lm32.c
 F: hw/lm32/
 F: hw/*/lm32_*
 F: hw/*/milkymist-*
+F: include/hw/display/milkymist_tmu2.h
 F: include/hw/char/lm32_juart.h
 F: include/hw/lm32/
 F: tests/tcg/lm32/
diff --git a/hw/display/milkymist-tmu2.c b/hw/display/milkymist-tmu2.c
index 3ce44fdfce..b33fc234e9 100644
--- a/hw/display/milkymist-tmu2.c
+++ b/hw/display/milkymist-tmu2.c
@@ -31,6 +31,7 @@ 
 #include "qapi/error.h"
 #include "qemu/error-report.h"
 #include "qapi/error.h"
+#include "hw/display/milkymist_tmu2.h"
 
 #include <X11/Xlib.h>
 #include <epoxy/gl.h>
@@ -499,3 +500,51 @@  static void milkymist_tmu2_register_types(void)
 }
 
 type_init(milkymist_tmu2_register_types)
+
+DeviceState *milkymist_tmu2_create(hwaddr base, qemu_irq irq)
+{
+    DeviceState *dev;
+    Display *d;
+    GLXFBConfig *configs;
+    int nelements;
+    int ver_major, ver_minor;
+
+    /* check that GLX will work */
+    d = XOpenDisplay(NULL);
+    if (d == NULL) {
+        return NULL;
+    }
+
+    if (!glXQueryVersion(d, &ver_major, &ver_minor)) {
+        /*
+         * Yeah, sometimes getting the GLX version can fail.
+         * Isn't X beautiful?
+         */
+        XCloseDisplay(d);
+        return NULL;
+    }
+
+    if ((ver_major < 1) || ((ver_major == 1) && (ver_minor < 3))) {
+        printf("Your GLX version is %d.%d,"
+          "but TMU emulation needs at least 1.3. TMU disabled.\n",
+          ver_major, ver_minor);
+        XCloseDisplay(d);
+        return NULL;
+    }
+
+    configs = glXChooseFBConfig(d, 0, glx_fbconfig_attr, &nelements);
+    if (configs == NULL) {
+        XCloseDisplay(d);
+        return NULL;
+    }
+
+    XFree(configs);
+    XCloseDisplay(d);
+
+    dev = qdev_create(NULL, TYPE_MILKYMIST_TMU2);
+    qdev_init_nofail(dev);
+    sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
+    sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq);
+
+    return dev;
+}
diff --git a/hw/lm32/milkymist-hw.h b/hw/lm32/milkymist-hw.h
index 32c344ef9f..976cf9254d 100644
--- a/hw/lm32/milkymist-hw.h
+++ b/hw/lm32/milkymist-hw.h
@@ -88,69 +88,6 @@  static inline DeviceState *milkymist_pfpu_create(hwaddr base,
     return dev;
 }
 
-#if defined(CONFIG_X11) && defined(CONFIG_OPENGL)
-#include <X11/Xlib.h>
-#include <epoxy/gl.h>
-#include <epoxy/glx.h>
-static const int glx_fbconfig_attr[] = {
-    GLX_GREEN_SIZE, 5,
-    GLX_GREEN_SIZE, 6,
-    GLX_BLUE_SIZE, 5,
-    None
-};
-#endif
-
-static inline DeviceState *milkymist_tmu2_create(hwaddr base,
-        qemu_irq irq)
-{
-#if defined(CONFIG_X11) && defined(CONFIG_OPENGL)
-    DeviceState *dev;
-    Display *d;
-    GLXFBConfig *configs;
-    int nelements;
-    int ver_major, ver_minor;
-
-    /* check that GLX will work */
-    d = XOpenDisplay(NULL);
-    if (d == NULL) {
-        return NULL;
-    }
-
-    if (!glXQueryVersion(d, &ver_major, &ver_minor)) {
-        /* Yeah, sometimes getting the GLX version can fail.
-         * Isn't X beautiful? */
-        XCloseDisplay(d);
-        return NULL;
-    }
-
-    if ((ver_major < 1) || ((ver_major == 1) && (ver_minor < 3))) {
-        printf("Your GLX version is %d.%d,"
-          "but TMU emulation needs at least 1.3. TMU disabled.\n",
-          ver_major, ver_minor);
-        XCloseDisplay(d);
-        return NULL;
-    }
-
-    configs = glXChooseFBConfig(d, 0, glx_fbconfig_attr, &nelements);
-    if (configs == NULL) {
-        XCloseDisplay(d);
-        return NULL;
-    }
-
-    XFree(configs);
-    XCloseDisplay(d);
-
-    dev = qdev_create(NULL, "milkymist-tmu2");
-    qdev_init_nofail(dev);
-    sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
-    sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq);
-
-    return dev;
-#else
-    return NULL;
-#endif
-}
-
 static inline DeviceState *milkymist_ac97_create(hwaddr base,
         qemu_irq crrequest_irq, qemu_irq crreply_irq, qemu_irq dmar_irq,
         qemu_irq dmaw_irq)
diff --git a/hw/lm32/milkymist.c b/hw/lm32/milkymist.c
index 63c6894c95..26a2398354 100644
--- a/hw/lm32/milkymist.c
+++ b/hw/lm32/milkymist.c
@@ -32,6 +32,7 @@ 
 #include "hw/loader.h"
 #include "elf.h"
 #include "milkymist-hw.h"
+#include "hw/display/milkymist_tmu2.h"
 #include "lm32.h"
 #include "exec/address-spaces.h"
 
diff --git a/include/hw/display/milkymist_tmu2.h b/include/hw/display/milkymist_tmu2.h
new file mode 100644
index 0000000000..148a119a1d
--- /dev/null
+++ b/include/hw/display/milkymist_tmu2.h
@@ -0,0 +1,41 @@ 
+/*
+ *  QEMU model of the Milkymist texture mapping unit.
+ *
+ *  Copyright (c) 2010 Michael Walle <michael@walle.cc>
+ *  Copyright (c) 2010 Sebastien Bourdeauducq
+ *                       <sebastien.bourdeauducq@lekernel.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * Specification available at:
+ *   http://milkymist.walle.cc/socdoc/tmu2.pdf
+ *
+ */
+
+#ifndef HW_DISPLAY_MILKYMIST_TMU2_H
+#define HW_DISPLAY_MILKYMIST_TMU2_H
+
+#include "hw/qdev.h"
+
+#if defined(CONFIG_X11) && defined(CONFIG_OPENGL)
+DeviceState *milkymist_tmu2_create(hwaddr base, qemu_irq irq);
+#else
+static inline DeviceState *milkymist_tmu2_create(hwaddr base, qemu_irq irq)
+{
+    return NULL;
+}
+#endif
+
+#endif /* HW_DISPLAY_MILKYMIST_TMU2_H */