diff mbox

[RFC,12/12] ppc: Add aCube Sam460ex board

Message ID 5e493fd14e60d92d4fd80492ceff5ba13eb7b558.1502643878.git.balaton@eik.bme.hu
State New
Headers show

Commit Message

BALATON Zoltan Aug. 13, 2017, 5:04 p.m. UTC
Add emulation of aCube Sam460ex board based on AMCC 460EX embedded SoC.
This is not a full implementation yet with a lot of components still
missing but enough to start a Linux kernel and the U-Boot firmware.

Signed-off-by: François Revol <revol@free.fr>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 default-configs/ppcemb-softmmu.mak |    3 +
 hw/ppc/Makefile.objs               |    2 +
 hw/ppc/sam460ex.c                  | 1895 ++++++++++++++++++++++++++++++++++++
 include/hw/pci/pcie_host.h         |    2 +-
 4 files changed, 1901 insertions(+), 1 deletion(-)
 create mode 100644 hw/ppc/sam460ex.c

Comments

David Gibson Aug. 18, 2017, 6:10 a.m. UTC | #1
On Sun, Aug 13, 2017 at 07:04:38PM +0200, BALATON Zoltan wrote:
> Add emulation of aCube Sam460ex board based on AMCC 460EX embedded SoC.
> This is not a full implementation yet with a lot of components still
> missing but enough to start a Linux kernel and the U-Boot firmware.
> 
> Signed-off-by: François Revol <revol@free.fr>
> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>

There are a *lot* of devices defined here.  Most of them look like
they belong to the SoC, not the board (since they use DCRs), so it
doesn't really make sense to define them in a board file.  It would
also make it easier to review if they were split up into separate
patches.
François Revol Aug. 18, 2017, 11:24 a.m. UTC | #2
Le 18/08/2017 à 08:10, David Gibson a écrit :
> On Sun, Aug 13, 2017 at 07:04:38PM +0200, BALATON Zoltan wrote:
>> Add emulation of aCube Sam460ex board based on AMCC 460EX embedded SoC.
>> This is not a full implementation yet with a lot of components still
>> missing but enough to start a Linux kernel and the U-Boot firmware.
>>
>> Signed-off-by: François Revol <revol@free.fr>
>> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> 
> There are a *lot* of devices defined here.  Most of them look like
> they belong to the SoC, not the board (since they use DCRs), so it
> doesn't really make sense to define them in a board file.  It would
> also make it easier to review if they were split up into separate
> patches.
> 


Indeed, I never thought it would need that many devices to run, and I
intended to move that out but never did.

While it'd make it easier to review, I also recall waiting 3 years to
get a simple patch in just because someone wanted the code to first be
refactored (hint: wacom) :p

François.
BALATON Zoltan Aug. 18, 2017, 12:46 p.m. UTC | #3
On Fri, 18 Aug 2017, David Gibson wrote:
> On Sun, Aug 13, 2017 at 07:04:38PM +0200, BALATON Zoltan wrote:
>> Add emulation of aCube Sam460ex board based on AMCC 460EX embedded SoC.
>> This is not a full implementation yet with a lot of components still
>> missing but enough to start a Linux kernel and the U-Boot firmware.
>>
>> Signed-off-by: François Revol <revol@free.fr>
>> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
>
> There are a *lot* of devices defined here.  Most of them look like
> they belong to the SoC, not the board (since they use DCRs), so it
> doesn't really make sense to define them in a board file.  It would
> also make it easier to review if they were split up into separate
> patches.

I thought it's simpler to review a series with 12 reasonably sized patches 
than one with twice as many which only modify a few lines here and there 
each. Also adding a lot of code scattered in hw directories is probably 
less clear than having them all at one place. But of course each approach 
can be reasoned. I thought this might have to be split up but I've left it 
one place for now for first review to get some advice on what's preferred.

Maybe I should put things that belong to the SoC in ppc440_uc.c (similar 
to ppc405uc.c we already have) and move common devices used by both to 
ppc4xx_devs.c (which already seems to serve that purpose). If more cleanup 
is needed that could be done separately afterwards, I don't think it's a 
good idea to mix in too much cleanup now to keep patches relatively 
simple. (I already have some moving around included as clean up patches 
but I'd like to focus on actual functions than clean up at this point).

Does putting these devices from board code to ppc440_uc.c sound 
acceptable?

Regards,
BALATON Zoltan
David Gibson Aug. 22, 2017, 2:35 a.m. UTC | #4
On Fri, Aug 18, 2017 at 02:46:42PM +0200, BALATON Zoltan wrote:
> On Fri, 18 Aug 2017, David Gibson wrote:
> > On Sun, Aug 13, 2017 at 07:04:38PM +0200, BALATON Zoltan wrote:
> > > Add emulation of aCube Sam460ex board based on AMCC 460EX embedded SoC.
> > > This is not a full implementation yet with a lot of components still
> > > missing but enough to start a Linux kernel and the U-Boot firmware.
> > > 
> > > Signed-off-by: François Revol <revol@free.fr>
> > > Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> > 
> > There are a *lot* of devices defined here.  Most of them look like
> > they belong to the SoC, not the board (since they use DCRs), so it
> > doesn't really make sense to define them in a board file.  It would
> > also make it easier to review if they were split up into separate
> > patches.
> 
> I thought it's simpler to review a series with 12 reasonably sized patches
> than one with twice as many which only modify a few lines here and there
> each. Also adding a lot of code scattered in hw directories is probably less
> clear than having them all at one place. But of course each approach can be
> reasoned. I thought this might have to be split up but I've left it one
> place for now for first review to get some advice on what's preferred.

Well, it depends on the content of the patches.  If splitting it up
means a lot of looking between patches to make sense of what's going
on then that's certainly not good.  But if the small patches are
independent of each other and can be assessed on their own merits,
then that usually makes it easier.

In this case the various new 440 devices should be pretty much
independent of each other, so I think splitting is the better option.

> Maybe I should put things that belong to the SoC in ppc440_uc.c (similar to
> ppc405uc.c we already have) and move common devices used by both to
> ppc4xx_devs.c (which already seems to serve that purpose). If more cleanup
> is needed that could be done separately afterwards, I don't think it's a
> good idea to mix in too much cleanup now to keep patches relatively simple.
> (I already have some moving around included as clean up patches but I'd like
> to focus on actual functions than clean up at this point).
> 
> Does putting these devices from board code to ppc440_uc.c sound
> acceptable?

That'd be ok - though again, I'd prefer to see each device as a
separate patch.  It would probably be preferable to put each device in
a separate file as well though, unless they're _really_ tiny.  Nothing
inherently wrong with small .c files, if they're still more or less
self contained.
BALATON Zoltan Aug. 22, 2017, 11:18 a.m. UTC | #5
On Tue, 22 Aug 2017, David Gibson wrote:
> On Fri, Aug 18, 2017 at 02:46:42PM +0200, BALATON Zoltan wrote:
>> On Fri, 18 Aug 2017, David Gibson wrote:
>>> On Sun, Aug 13, 2017 at 07:04:38PM +0200, BALATON Zoltan wrote:
>>>> Add emulation of aCube Sam460ex board based on AMCC 460EX embedded SoC.
>>>> This is not a full implementation yet with a lot of components still
>>>> missing but enough to start a Linux kernel and the U-Boot firmware.
>>>>
>>>> Signed-off-by: François Revol <revol@free.fr>
>>>> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
>>>
>>> There are a *lot* of devices defined here.  Most of them look like
>>> they belong to the SoC, not the board (since they use DCRs), so it
>>> doesn't really make sense to define them in a board file.  It would
>>> also make it easier to review if they were split up into separate
>>> patches.
>>
>> I thought it's simpler to review a series with 12 reasonably sized patches
>> than one with twice as many which only modify a few lines here and there
>> each. Also adding a lot of code scattered in hw directories is probably less
>> clear than having them all at one place. But of course each approach can be
>> reasoned. I thought this might have to be split up but I've left it one
>> place for now for first review to get some advice on what's preferred.
>
> Well, it depends on the content of the patches.  If splitting it up
> means a lot of looking between patches to make sense of what's going
> on then that's certainly not good.  But if the small patches are
> independent of each other and can be assessed on their own merits,
> then that usually makes it easier.
>
> In this case the various new 440 devices should be pretty much
> independent of each other, so I think splitting is the better option.
>
>> Maybe I should put things that belong to the SoC in ppc440_uc.c (similar to
>> ppc405uc.c we already have) and move common devices used by both to
>> ppc4xx_devs.c (which already seems to serve that purpose). If more cleanup
>> is needed that could be done separately afterwards, I don't think it's a
>> good idea to mix in too much cleanup now to keep patches relatively simple.
>> (I already have some moving around included as clean up patches but I'd like
>> to focus on actual functions than clean up at this point).
>>
>> Does putting these devices from board code to ppc440_uc.c sound
>> acceptable?
>
> That'd be ok - though again, I'd prefer to see each device as a
> separate patch.  It would probably be preferable to put each device in
> a separate file as well though, unless they're _really_ tiny.  Nothing
> inherently wrong with small .c files, if they're still more or less
> self contained.

Since most of these are just stubs for now and not really full emulation 
of the device I'd leave them in one file similar to ppc405 for now. They 
both could be cleaned up later if it's found necessary or devices that are 
deemed ready and big enough to be moved out could be split off (like I did 
with i2c and pcix). If you insist, I can split it now but I think it's 
more difficult to work with a lot of small files scattered in hw instead 
of everything related to ppc440 in one place until there's still missing 
fucntionality. I consider splitting it up cleanup which could be done 
later separately unless it's a requirement to get this series in.
David Gibson Aug. 23, 2017, 12:35 a.m. UTC | #6
On Tue, Aug 22, 2017 at 01:18:02PM +0200, BALATON Zoltan wrote:
> On Tue, 22 Aug 2017, David Gibson wrote:
> > On Fri, Aug 18, 2017 at 02:46:42PM +0200, BALATON Zoltan wrote:
> > > On Fri, 18 Aug 2017, David Gibson wrote:
> > > > On Sun, Aug 13, 2017 at 07:04:38PM +0200, BALATON Zoltan wrote:
> > > > > Add emulation of aCube Sam460ex board based on AMCC 460EX embedded SoC.
> > > > > This is not a full implementation yet with a lot of components still
> > > > > missing but enough to start a Linux kernel and the U-Boot firmware.
> > > > > 
> > > > > Signed-off-by: François Revol <revol@free.fr>
> > > > > Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> > > > 
> > > > There are a *lot* of devices defined here.  Most of them look like
> > > > they belong to the SoC, not the board (since they use DCRs), so it
> > > > doesn't really make sense to define them in a board file.  It would
> > > > also make it easier to review if they were split up into separate
> > > > patches.
> > > 
> > > I thought it's simpler to review a series with 12 reasonably sized patches
> > > than one with twice as many which only modify a few lines here and there
> > > each. Also adding a lot of code scattered in hw directories is probably less
> > > clear than having them all at one place. But of course each approach can be
> > > reasoned. I thought this might have to be split up but I've left it one
> > > place for now for first review to get some advice on what's preferred.
> > 
> > Well, it depends on the content of the patches.  If splitting it up
> > means a lot of looking between patches to make sense of what's going
> > on then that's certainly not good.  But if the small patches are
> > independent of each other and can be assessed on their own merits,
> > then that usually makes it easier.
> > 
> > In this case the various new 440 devices should be pretty much
> > independent of each other, so I think splitting is the better option.
> > 
> > > Maybe I should put things that belong to the SoC in ppc440_uc.c (similar to
> > > ppc405uc.c we already have) and move common devices used by both to
> > > ppc4xx_devs.c (which already seems to serve that purpose). If more cleanup
> > > is needed that could be done separately afterwards, I don't think it's a
> > > good idea to mix in too much cleanup now to keep patches relatively simple.
> > > (I already have some moving around included as clean up patches but I'd like
> > > to focus on actual functions than clean up at this point).
> > > 
> > > Does putting these devices from board code to ppc440_uc.c sound
> > > acceptable?
> > 
> > That'd be ok - though again, I'd prefer to see each device as a
> > separate patch.  It would probably be preferable to put each device in
> > a separate file as well though, unless they're _really_ tiny.  Nothing
> > inherently wrong with small .c files, if they're still more or less
> > self contained.
> 
> Since most of these are just stubs for now and not really full emulation of
> the device I'd leave them in one file similar to ppc405 for now. They both
> could be cleaned up later if it's found necessary or devices that are deemed
> ready and big enough to be moved out could be split off (like I did with i2c
> and pcix). If you insist, I can split it now but I think it's more difficult
> to work with a lot of small files scattered in hw instead of everything
> related to ppc440 in one place until there's still missing fucntionality. I
> consider splitting it up cleanup which could be done later separately unless
> it's a requirement to get this series in.

Ok, that's a reasonable argument.  Go ahead and put them in a
ppc440_uc.c file.
BALATON Zoltan Aug. 23, 2017, 12:48 a.m. UTC | #7
On Wed, 23 Aug 2017, David Gibson wrote:
> On Tue, Aug 22, 2017 at 01:18:02PM +0200, BALATON Zoltan wrote:
>> On Tue, 22 Aug 2017, David Gibson wrote:
>>> On Fri, Aug 18, 2017 at 02:46:42PM +0200, BALATON Zoltan wrote:
>>>> On Fri, 18 Aug 2017, David Gibson wrote:
>>>>> On Sun, Aug 13, 2017 at 07:04:38PM +0200, BALATON Zoltan wrote:
>>>>>> Add emulation of aCube Sam460ex board based on AMCC 460EX embedded SoC.
>>>>>> This is not a full implementation yet with a lot of components still
>>>>>> missing but enough to start a Linux kernel and the U-Boot firmware.
>>>>>>
>>>>>> Signed-off-by: François Revol <revol@free.fr>
>>>>>> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
>>>>>
>>>>> There are a *lot* of devices defined here.  Most of them look like
>>>>> they belong to the SoC, not the board (since they use DCRs), so it
>>>>> doesn't really make sense to define them in a board file.  It would
>>>>> also make it easier to review if they were split up into separate
>>>>> patches.
>>>>
>>>> I thought it's simpler to review a series with 12 reasonably sized patches
>>>> than one with twice as many which only modify a few lines here and there
>>>> each. Also adding a lot of code scattered in hw directories is probably less
>>>> clear than having them all at one place. But of course each approach can be
>>>> reasoned. I thought this might have to be split up but I've left it one
>>>> place for now for first review to get some advice on what's preferred.
>>>
>>> Well, it depends on the content of the patches.  If splitting it up
>>> means a lot of looking between patches to make sense of what's going
>>> on then that's certainly not good.  But if the small patches are
>>> independent of each other and can be assessed on their own merits,
>>> then that usually makes it easier.
>>>
>>> In this case the various new 440 devices should be pretty much
>>> independent of each other, so I think splitting is the better option.
>>>
>>>> Maybe I should put things that belong to the SoC in ppc440_uc.c (similar to
>>>> ppc405uc.c we already have) and move common devices used by both to
>>>> ppc4xx_devs.c (which already seems to serve that purpose). If more cleanup
>>>> is needed that could be done separately afterwards, I don't think it's a
>>>> good idea to mix in too much cleanup now to keep patches relatively simple.
>>>> (I already have some moving around included as clean up patches but I'd like
>>>> to focus on actual functions than clean up at this point).
>>>>
>>>> Does putting these devices from board code to ppc440_uc.c sound
>>>> acceptable?
>>>
>>> That'd be ok - though again, I'd prefer to see each device as a
>>> separate patch.  It would probably be preferable to put each device in
>>> a separate file as well though, unless they're _really_ tiny.  Nothing
>>> inherently wrong with small .c files, if they're still more or less
>>> self contained.
>>
>> Since most of these are just stubs for now and not really full emulation of
>> the device I'd leave them in one file similar to ppc405 for now. They both
>> could be cleaned up later if it's found necessary or devices that are deemed
>> ready and big enough to be moved out could be split off (like I did with i2c
>> and pcix). If you insist, I can split it now but I think it's more difficult
>> to work with a lot of small files scattered in hw instead of everything
>> related to ppc440 in one place until there's still missing fucntionality. I
>> consider splitting it up cleanup which could be done later separately unless
>> it's a requirement to get this series in.
>
> Ok, that's a reasonable argument.  Go ahead and put them in a
> ppc440_uc.c file.

I already did in the non RFC submission of the series I've sent last 
Sunday (in [PATCH 14/15] ppc4xx: Add device models found in PPC440 core).
diff mbox

Patch

diff --git a/default-configs/ppcemb-softmmu.mak b/default-configs/ppcemb-softmmu.mak
index 94340de..9a0a177 100644
--- a/default-configs/ppcemb-softmmu.mak
+++ b/default-configs/ppcemb-softmmu.mak
@@ -16,3 +16,6 @@  CONFIG_XILINX=y
 CONFIG_XILINX_ETHLITE=y
 CONFIG_LIBDECNUMBER=y
 CONFIG_SM501=y
+CONFIG_USB_EHCI_SYSBUS=y
+CONFIG_IDE_SII3112=y
+CONFIG_SAM460EX=y
diff --git a/hw/ppc/Makefile.objs b/hw/ppc/Makefile.objs
index 9c5d58a..a242a59 100644
--- a/hw/ppc/Makefile.objs
+++ b/hw/ppc/Makefile.objs
@@ -27,3 +27,5 @@  obj-$(CONFIG_E500) += e500.o mpc8544ds.o e500plat.o
 obj-$(CONFIG_E500) += mpc8544_guts.o ppce500_spin.o
 # PowerPC 440 Xilinx ML507 reference board.
 obj-$(CONFIG_XILINX) += virtex_ml507.o
+# ACube Sam460ex board.
+obj-$(CONFIG_SAM460EX) += sam460ex.o
diff --git a/hw/ppc/sam460ex.c b/hw/ppc/sam460ex.c
new file mode 100644
index 0000000..c61eb99
--- /dev/null
+++ b/hw/ppc/sam460ex.c
@@ -0,0 +1,1895 @@ 
+/*
+ * QEMU aCube Sam460ex board emulation
+ *
+ * Copyright (c) 2012 François Revol
+ * Copyright (c) 2016-2017 BALATON Zoltan
+ *
+ * This file is derived from hw/ppc440_bamboo.c,
+ * the copyright for that material belongs to the original owners.
+ *
+ * This work is licensed under the GNU GPL license version 2 or later.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "qemu/cutils.h"
+#include "qapi/error.h"
+#include "hw/hw.h"
+#include "sysemu/blockdev.h"
+#include "hw/boards.h"
+#include "sysemu/kvm.h"
+#include "kvm_ppc.h"
+#include "sysemu/device_tree.h"
+#include "sysemu/block-backend.h"
+#include "hw/loader.h"
+#include "elf.h"
+#include "exec/address-spaces.h"
+#include "exec/memory.h"
+#include "hw/ppc/ppc.h"
+#include "hw/ppc/ppc405.h"
+#include "hw/block/flash.h"
+#include "sysemu/sysemu.h"
+#include "hw/sysbus.h"
+#include "hw/char/serial.h"
+#include "hw/i2c/ppc4xx_i2c.h"
+#include "hw/i2c/smbus.h"
+#include "hw/usb/hcd-ehci.h"
+
+#undef DEBUG_SDRAM
+#undef DEBUG_L2SRAM
+#undef DEBUG_CPR
+#undef DEBUG_SDR
+#undef DEBUG_AHB
+#undef DEBUG_PCIE
+
+#define BINARY_DEVICE_TREE_FILE "sam460ex.dtb"
+#define UBOOT_FILENAME "u-boot-sam460-20100605.bin"
+/* to extract the official U-Boot bin from the updater: */
+/* dd bs=1 skip=$(($(stat -c '%s' updater/updater-460) - 0x80000)) \
+     if=updater/updater-460 of=u-boot-sam460-20100605.bin */
+
+/* from Sam460 U-Boot include/configs/Sam460ex.h */
+#define FLASH_BASE             0xfff00000
+#define FLASH_BASE_H           0x4
+#define FLASH_SIZE             (1 << 20)
+#define UBOOT_LOAD_BASE        0xfff80000
+#define UBOOT_SIZE             0x00080000
+#define UBOOT_ENTRY            0xfffffffc
+
+/* from U-Boot */
+#define EPAPR_MAGIC           (0x45504150)
+#define KERNEL_ADDR           0x1000000
+#define FDT_ADDR              0x1800000
+#define RAMDISK_ADDR          0x1900000
+
+/* Sam460ex IRQ MAP:
+   IRQ0  = ETH_INT
+   IRQ1  = FPGA_INT
+   IRQ2  = PCI_INT (PCIA, PCIB, PCIC, PCIB)
+   IRQ3  = FPGA_INT2
+   IRQ11 = RTC_INT
+   IRQ12 = SM502_INT
+*/
+
+#define SDRAM_NR_BANKS 4
+
+/* FIXME: See u-boot.git 8ac41e */
+static const unsigned int ppc460ex_sdram_bank_sizes[] = {
+    1024 << 20, 512 << 20, 256 << 20, 128 << 20, 64 << 20, 32 << 20, 0
+};
+
+struct boot_info {
+    uint32_t dt_base;
+    uint32_t dt_size;
+    uint32_t entry;
+};
+
+/*****************************************************************************/
+/* L2 Cache as SRAM */
+/* FIXME:fix names */
+enum {
+    DCR_L2CACHE_BASE  = 0x030,
+    DCR_L2CACHE_CFG   = DCR_L2CACHE_BASE,
+    DCR_L2CACHE_CMD,
+    DCR_L2CACHE_ADDR,
+    DCR_L2CACHE_DATA,
+    DCR_L2CACHE_STAT,
+    DCR_L2CACHE_CVER,
+    DCR_L2CACHE_SNP0,
+    DCR_L2CACHE_SNP1,
+    DCR_L2CACHE_END   = DCR_L2CACHE_SNP1,
+};
+
+/* base is 460ex-specific, cf. U-Boot, ppc4xx-isram.h */
+enum {
+    DCR_ISRAM0_BASE   = 0x020,
+    DCR_ISRAM0_SB0CR  = DCR_ISRAM0_BASE,
+    DCR_ISRAM0_SB1CR,
+    DCR_ISRAM0_SB2CR,
+    DCR_ISRAM0_SB3CR,
+    DCR_ISRAM0_BEAR,
+    DCR_ISRAM0_BESR0,
+    DCR_ISRAM0_BESR1,
+    DCR_ISRAM0_PMEG,
+    DCR_ISRAM0_CID,
+    DCR_ISRAM0_REVID,
+    DCR_ISRAM0_DPC,
+    DCR_ISRAM0_END    = DCR_ISRAM0_DPC
+};
+
+enum {
+    DCR_ISRAM1_BASE   = 0x0b0,
+    DCR_ISRAM1_SB0CR  = DCR_ISRAM1_BASE,
+    /* single bank */
+    DCR_ISRAM1_BEAR   = DCR_ISRAM1_BASE + 0x04,
+    DCR_ISRAM1_BESR0,
+    DCR_ISRAM1_BESR1,
+    DCR_ISRAM1_PMEG,
+    DCR_ISRAM1_CID,
+    DCR_ISRAM1_REVID,
+    DCR_ISRAM1_DPC,
+    DCR_ISRAM1_END    = DCR_ISRAM1_DPC
+};
+
+typedef struct ppc4xx_l2sram_t {
+    MemoryRegion bank[4];
+    uint32_t l2cache[8];
+    uint32_t isram0[11];
+} ppc4xx_l2sram_t;
+
+#ifdef MAP_L2SRAM
+static void l2sram_update_mappings(ppc4xx_l2sram_t *l2sram,
+                                   uint32_t isarc, uint32_t isacntl,
+                                   uint32_t dsarc, uint32_t dsacntl)
+{
+#ifdef DEBUG_L2SRAM
+    printf("L2SRAM update ISA %08" PRIx32 " %08" PRIx32 " (%08" PRIx32
+           " %08" PRIx32 ") DSA %08" PRIx32 " %08" PRIx32
+           " (%08" PRIx32 " %08" PRIx32 ")\n",
+           isarc, isacntl, dsarc, dsacntl,
+           l2sram->isarc, l2sram->isacntl, l2sram->dsarc, l2sram->dsacntl);
+#endif
+    if (l2sram->isarc != isarc ||
+        (l2sram->isacntl & 0x80000000) != (isacntl & 0x80000000)) {
+        if (l2sram->isacntl & 0x80000000) {
+            /* Unmap previously assigned memory region */
+            printf("L2SRAM unmap ISA %08" PRIx32 "\n", l2sram->isarc);
+            memory_region_del_subregion(get_system_memory(),
+                                        &l2sram->isarc_ram);
+        }
+        if (isacntl & 0x80000000) {
+            /* Map new instruction memory region */
+#ifdef DEBUG_L2SRAM
+            printf("L2SRAM map ISA %08" PRIx32 "\n", isarc);
+#endif
+            memory_region_add_subregion(get_system_memory(), isarc,
+                                        &l2sram->isarc_ram);
+        }
+    }
+    if (l2sram->dsarc != dsarc ||
+        (l2sram->dsacntl & 0x80000000) != (dsacntl & 0x80000000)) {
+        if (l2sram->dsacntl & 0x80000000) {
+            /* Beware not to unmap the region we just mapped */
+            if (!(isacntl & 0x80000000) || l2sram->dsarc != isarc) {
+                /* Unmap previously assigned memory region */
+#ifdef DEBUG_L2SRAM
+                printf("L2SRAM unmap DSA %08" PRIx32 "\n", l2sram->dsarc);
+#endif
+                memory_region_del_subregion(get_system_memory(),
+                                            &l2sram->dsarc_ram);
+            }
+        }
+        if (dsacntl & 0x80000000) {
+            /* Beware not to remap the region we just mapped */
+            if (!(isacntl & 0x80000000) || dsarc != isarc) {
+                /* Map new data memory region */
+#ifdef DEBUG_L2SRAM
+                printf("L2SRAM map DSA %08" PRIx32 "\n", dsarc);
+#endif
+                memory_region_add_subregion(get_system_memory(), dsarc,
+                                            &l2sram->dsarc_ram);
+            }
+        }
+    }
+}
+#endif
+
+static uint32_t dcr_read_l2sram(void *opaque, int dcrn)
+{
+    ppc4xx_l2sram_t *l2sram;
+    uint32_t ret;
+
+    l2sram = opaque;
+    switch (dcrn) {
+    case DCR_L2CACHE_CFG:
+    case DCR_L2CACHE_CMD:
+    case DCR_L2CACHE_ADDR:
+    case DCR_L2CACHE_DATA:
+    case DCR_L2CACHE_STAT:
+    case DCR_L2CACHE_CVER:
+    case DCR_L2CACHE_SNP0:
+    case DCR_L2CACHE_SNP1:
+        ret = l2sram->l2cache[dcrn - DCR_L2CACHE_BASE];
+#ifdef DEBUG_L2SRAM
+        printf("L2SRAM: read DCR[%x(L2CACHE+%x)]: %08" PRIx32 "\n",
+               dcrn, dcrn - DCR_L2CACHE_BASE, ret);
+#endif
+        break;
+
+    case DCR_ISRAM0_SB0CR:
+    case DCR_ISRAM0_SB1CR:
+    case DCR_ISRAM0_SB2CR:
+    case DCR_ISRAM0_SB3CR:
+    case DCR_ISRAM0_BEAR:
+    case DCR_ISRAM0_BESR0:
+    case DCR_ISRAM0_BESR1:
+    case DCR_ISRAM0_PMEG:
+    case DCR_ISRAM0_CID:
+    case DCR_ISRAM0_REVID:
+    case DCR_ISRAM0_DPC:
+        ret = l2sram->isram0[dcrn - DCR_ISRAM0_BASE];
+#ifdef DEBUG_L2SRAM
+        printf("L2SRAM: read DCR[%x(ISRAM0+%x)]: %08" PRIx32 "\n",
+               dcrn, dcrn - DCR_ISRAM0_BASE, ret);
+#endif
+        break;
+
+    default:
+        ret = 0;
+        break;
+    }
+
+    return ret;
+}
+
+static void dcr_write_l2sram(void *opaque, int dcrn, uint32_t val)
+{
+    /*ppc4xx_l2sram_t *l2sram = opaque;*/
+    /* TODO */
+
+    switch (dcrn) {
+    case DCR_L2CACHE_CFG:
+    case DCR_L2CACHE_CMD:
+    case DCR_L2CACHE_ADDR:
+    case DCR_L2CACHE_DATA:
+    case DCR_L2CACHE_STAT:
+    case DCR_L2CACHE_CVER:
+    case DCR_L2CACHE_SNP0:
+    case DCR_L2CACHE_SNP1:
+        /*l2sram->l2cache[dcrn - DCR_L2CACHE_BASE] = val;*/
+#ifdef DEBUG_L2SRAM
+        printf("L2SRAM: write DCR[%x(L2CACHE+%x)]: %08" PRIx32 "\n",
+               dcrn, dcrn - DCR_L2CACHE_BASE, val);
+#endif
+        break;
+
+    case DCR_ISRAM0_SB0CR:
+    case DCR_ISRAM0_SB1CR:
+    case DCR_ISRAM0_SB2CR:
+    case DCR_ISRAM0_SB3CR:
+    case DCR_ISRAM0_BEAR:
+    case DCR_ISRAM0_BESR0:
+    case DCR_ISRAM0_BESR1:
+    case DCR_ISRAM0_PMEG:
+    case DCR_ISRAM0_CID:
+    case DCR_ISRAM0_REVID:
+    case DCR_ISRAM0_DPC:
+        /*l2sram->isram0[dcrn - DCR_L2CACHE_BASE] = val;*/
+#ifdef DEBUG_L2SRAM
+        printf("L2SRAM: write DCR[%x(ISRAM0+%x)]: %08" PRIx32 "\n",
+               dcrn, dcrn - DCR_ISRAM0_BASE, val);
+#endif
+        break;
+
+    case DCR_ISRAM1_SB0CR:
+    case DCR_ISRAM1_BEAR:
+    case DCR_ISRAM1_BESR0:
+    case DCR_ISRAM1_BESR1:
+    case DCR_ISRAM1_PMEG:
+    case DCR_ISRAM1_CID:
+    case DCR_ISRAM1_REVID:
+    case DCR_ISRAM1_DPC:
+        /*l2sram->isram1[dcrn - DCR_L2CACHE_BASE] = val;*/
+#ifdef DEBUG_L2SRAM
+        printf("L2SRAM: write DCR[%x(ISRAM1+%x)]: %08" PRIx32 "\n",
+               dcrn, dcrn - DCR_ISRAM1_BASE, val);
+#endif
+        break;
+    }
+    /*l2sram_update_mappings(l2sram, isarc, isacntl, dsarc, dsacntl);*/
+}
+
+static void l2sram_reset(void *opaque)
+{
+    ppc4xx_l2sram_t *l2sram;
+    /*uint32_t isarc, dsarc, isacntl, dsacntl;*/
+
+    l2sram = opaque;
+    memset(l2sram->l2cache, 0, sizeof(l2sram->l2cache));
+    l2sram->l2cache[DCR_L2CACHE_STAT - DCR_L2CACHE_BASE] = 0x80000000;
+    memset(l2sram->isram0, 0, sizeof(l2sram->isram0));
+    /*l2sram_update_mappings(l2sram, isarc, isacntl, dsarc, dsacntl);*/
+}
+
+static void ppc4xx_l2sram_init(CPUPPCState *env)
+{
+    ppc4xx_l2sram_t *l2sram;
+
+    l2sram = g_malloc0(sizeof(ppc4xx_l2sram_t));
+    /* XXX: Size is 4*64kB for 460ex, cf. U-Boot, ppc4xx-isram.h */
+    memory_region_init_ram(&l2sram->bank[0], NULL, "ppc4xx.l2sram_bank0",
+                           64 * 1024, &error_abort);
+    memory_region_init_ram(&l2sram->bank[1], NULL, "ppc4xx.l2sram_bank1",
+                           64 * 1024, &error_abort);
+    memory_region_init_ram(&l2sram->bank[2], NULL, "ppc4xx.l2sram_bank2",
+                           64 * 1024, &error_abort);
+    memory_region_init_ram(&l2sram->bank[3], NULL, "ppc4xx.l2sram_bank3",
+                           64 * 1024, &error_abort);
+    qemu_register_reset(&l2sram_reset, l2sram);
+    ppc_dcr_register(env, DCR_L2CACHE_CFG,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_L2CACHE_CMD,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_L2CACHE_ADDR,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_L2CACHE_DATA,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_L2CACHE_STAT,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_L2CACHE_CVER,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_L2CACHE_SNP0,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_L2CACHE_SNP1,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+
+    ppc_dcr_register(env, DCR_ISRAM0_SB0CR,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_ISRAM0_SB1CR,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_ISRAM0_SB2CR,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_ISRAM0_SB3CR,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_ISRAM0_PMEG,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_ISRAM0_DPC,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+
+    ppc_dcr_register(env, DCR_ISRAM1_SB0CR,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_ISRAM1_PMEG,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+    ppc_dcr_register(env, DCR_ISRAM1_DPC,
+                     l2sram, &dcr_read_l2sram, &dcr_write_l2sram);
+}
+
+/*****************************************************************************/
+/* Clocking Power on Reset */
+enum {
+    CPR0_CFGADDR = 0x00C,
+    CPR0_CFGDATA = 0x00D,
+};
+
+typedef struct ppc4xx_cpr_t {
+    uint32_t addr;
+} ppc4xx_cpr_t;
+
+static uint32_t dcr_read_cpr(void *opaque, int dcrn)
+{
+    ppc4xx_cpr_t *cpr = opaque;
+    uint32_t ret;
+
+    switch (dcrn) {
+    case CPR0_CFGADDR:
+        ret = cpr->addr;
+#ifdef DEBUG_CPR
+        printf("read DCR[%x(CPR0ADDR)]: %08" PRIx32 "\n", dcrn, ret);
+#endif
+        break;
+    case CPR0_CFGDATA:
+        ret = 0;
+#ifdef DEBUG_CPR
+        printf("read DCR[%x(CPR0DATA)]: %08" PRIx32 "\n", dcrn, ret);
+#endif
+        break;
+    default:
+        /* Avoid gcc warning */
+        ret = 0;
+        break;
+    }
+
+    return ret;
+}
+
+static void dcr_write_cpr(void *opaque, int dcrn, uint32_t val)
+{
+    ppc4xx_cpr_t *cpr = opaque;
+
+    switch (dcrn) {
+    case CPR0_CFGADDR:
+        cpr->addr = val;
+#ifdef DEBUG_CPR
+        printf("write DCR[%x(CPRADDR)]: %08" PRIx32 "\n", dcrn, val);
+#endif
+        break;
+    case CPR0_CFGDATA:
+#ifdef DEBUG_CPR
+        printf("write DCR[%x(CPRDATA)]: %08" PRIx32 "\n", dcrn, val);
+#endif
+        break;
+    default:
+#ifdef DEBUG_CPR
+        printf("write DCR[%x]: %08" PRIx32 "\n", dcrn, val);
+#endif
+        break;
+    }
+}
+
+static void ppc4xx_cpr_reset(void *opaque)
+{
+    ppc4xx_cpr_t *cpr = opaque;
+
+    cpr->addr = 0;
+}
+
+static void ppc4xx_cpr_init(CPUPPCState *env)
+{
+    ppc4xx_cpr_t *cpr;
+
+    cpr = g_malloc0(sizeof(*cpr));
+    ppc_dcr_register(env, CPR0_CFGADDR, cpr, &dcr_read_cpr, &dcr_write_cpr);
+    ppc_dcr_register(env, CPR0_CFGDATA, cpr, &dcr_read_cpr, &dcr_write_cpr);
+    qemu_register_reset(ppc4xx_cpr_reset, cpr);
+}
+
+/*****************************************************************************/
+/* System DCRs */
+typedef struct ppc4xx_sdr_t ppc4xx_sdr_t;
+struct ppc4xx_sdr_t {
+    uint32_t addr;
+};
+
+enum {
+    SDR0_CFGADDR = 0x00e,
+    SDR0_CFGDATA,
+    SDR0_STRP0 = 0x020,
+    SDR0_STRP1,
+    SDR0_ECID3 = 0x083,
+    SDR0_DDR0 = 0x0e1,
+    SDR0_USB0 = 0x320,
+};
+
+enum {
+    PESDR0_LOOP = 0x303,
+    PESDR0_RCSSET,
+    PESDR0_RCSSTS,
+    PESDR0_RSTSTA = 0x310,
+    PESDR1_LOOP = 0x343,
+    PESDR1_RCSSET,
+    PESDR1_RCSSTS,
+    PESDR1_RSTSTA = 0x365,
+};
+
+#define SDR0_DDR0_DDRM_ENCODE(n)  ((((unsigned long)(n)) & 0x03) << 29)
+#define SDR0_DDR0_DDRM_DDR1       0x20000000
+#define SDR0_DDR0_DDRM_DDR2       0x40000000
+
+static uint32_t dcr_read_sdr(void *opaque, int dcrn)
+{
+    ppc4xx_sdr_t *sdr;
+    uint32_t ret;
+
+    sdr = opaque;
+    switch (dcrn) {
+    case SDR0_CFGADDR:
+        ret = sdr->addr;
+        break;
+    case SDR0_CFGDATA:
+        switch (sdr->addr) {
+        case SDR0_STRP0:
+            /* FIXME: Is this correct? This breaks timing */
+            ret = 0 /*5 << 8 | 15 << 4*/;
+            break;
+        case SDR0_STRP1:
+            ret = 5 << 29 | 2 << 26 | 1 << 24;
+            break;
+        case SDR0_ECID3:
+            ret = 1 << 20; /* No Security/Kasumi support */
+            break;
+        case SDR0_DDR0:
+            ret = SDR0_DDR0_DDRM_ENCODE(1) | SDR0_DDR0_DDRM_DDR1;
+            break;
+        case PESDR0_RCSSET:
+        case PESDR1_RCSSET:
+            ret = (1 << 24) | (1 << 16);
+            break;
+        case PESDR0_RCSSTS:
+        case PESDR1_RCSSTS:
+            ret = (1 << 16) | (1 << 12);
+            break;
+        case PESDR0_RSTSTA:
+        case PESDR1_RSTSTA:
+            ret = 1;
+            break;
+        case PESDR0_LOOP:
+        case PESDR1_LOOP:
+            ret = 1 << 12;
+            break;
+        default:
+            ret = 0;
+            break;
+        }
+#ifdef DEBUG_SDR
+        if (sdr->addr != 0x20 && sdr->addr != 0x21) {
+            printf("read DCR[%x(SDRDATA[%x])]: %08" PRIx32 "\n",
+                   dcrn, sdr->addr, ret);
+        }
+#endif
+        break;
+    default:
+        ret = 0;
+#ifdef DEBUG_SDR
+        printf("read DCR[%x]: %08" PRIx32 "\n", dcrn, ret);
+#endif
+        break;
+    }
+
+    return ret;
+}
+
+static void dcr_write_sdr(void *opaque, int dcrn, uint32_t val)
+{
+    ppc4xx_sdr_t *sdr;
+
+    sdr = opaque;
+    switch (dcrn) {
+    case SDR0_CFGADDR:
+        sdr->addr = val;
+        break;
+    case SDR0_CFGDATA:
+#ifdef DEBUG_SDR
+        printf("write DCR[%x(SDRDATA[%x])]: %08" PRIx32 "\n",
+               dcrn, sdr->addr, val);
+#endif
+        switch (sdr->addr) {
+        case 0x00: /* B0CR */
+            break;
+        default:
+            break;
+        }
+        break;
+    default:
+#ifdef DEBUG_SDR
+        printf("write DCR[%x]: %08" PRIx32 "\n", dcrn, val);
+#endif
+        break;
+    }
+}
+
+static void sdr_reset(void *opaque)
+{
+    ppc4xx_sdr_t *sdr;
+
+    sdr = opaque;
+    sdr->addr = 0;
+}
+
+static void ppc4xx_sdr_init(CPUPPCState *env)
+{
+    ppc4xx_sdr_t *sdr;
+
+    sdr = g_malloc0(sizeof(ppc4xx_sdr_t));
+    qemu_register_reset(&sdr_reset, sdr);
+    ppc_dcr_register(env, SDR0_CFGADDR,
+                     sdr, &dcr_read_sdr, &dcr_write_sdr);
+    ppc_dcr_register(env, SDR0_CFGDATA,
+                     sdr, &dcr_read_sdr, &dcr_write_sdr);
+    ppc_dcr_register(env, SDR0_USB0,
+                     sdr, &dcr_read_sdr, &dcr_write_sdr);
+}
+
+/*****************************************************************************/
+/* SDRAM controller */
+typedef struct ppc4xx_sdram_t {
+    uint32_t addr;
+    int nbanks;
+    MemoryRegion containers[4]; /* used for clipping */
+    MemoryRegion *ram_memories;
+    hwaddr ram_bases[4];
+    hwaddr ram_sizes[4];
+    uint32_t bcr[4];
+} ppc4xx_sdram_t;
+
+enum {
+    SDRAM_R0BAS = 0x040,
+    SDRAM_R1BAS,
+    SDRAM_R2BAS,
+    SDRAM_R3BAS,
+    SDRAM_CONF1HB = 0x045,
+    SDRAM_PLBADDULL = 0x04a,
+    SDRAM_CONF1LL = 0x04b,
+    SDRAM_CONFPATHB = 0x04f,
+    SDRAM_PLBADDUHB = 0x050,
+    SDRAM0_CFGADDR = 0x010,
+    SDRAM0_CFGDATA,
+};
+
+/* XXX: TOFIX: some patches have made this code become inconsistent:
+ *      there are type inconsistencies, mixing hwaddr, target_ulong
+ *      and uint32_t
+ */
+static uint32_t sdram_bcr(hwaddr ram_base, hwaddr ram_size)
+{
+    uint32_t bcr;
+
+    switch (ram_size) {
+    case (8 * M_BYTE):
+        bcr = 0xffc0;
+        break;
+    case (16 * M_BYTE):
+        bcr = 0xff80;
+        break;
+    case (32 * M_BYTE):
+        bcr = 0xff00;
+        break;
+    case (64 * M_BYTE):
+        bcr = 0xfe00;
+        break;
+    case (128 * M_BYTE):
+        bcr = 0xfc00;
+        break;
+    case (256 * M_BYTE):
+        bcr = 0xf800;
+        break;
+    case (512 * M_BYTE):
+        bcr = 0xf000;
+        break;
+    case (1 * G_BYTE):
+        bcr = 0xe000;
+        break;
+/*
+    case (2 * G_BYTE):
+        bcr = 0xc000;
+        break;
+    case (4 * G_BYTE):
+        bcr = 0x8000;
+        break;
+*/
+    default:
+        printf("%s: invalid RAM size " TARGET_FMT_plx "\n", __func__,
+               ram_size);
+        return 0;
+    }
+    bcr |= ram_base & 0xFF800000;
+    bcr |= 1;
+
+    return bcr;
+}
+
+static inline hwaddr sdram_base(uint32_t bcr)
+{
+    return bcr & 0xFF800000;
+}
+
+static target_ulong sdram_size(uint32_t bcr)
+{
+    target_ulong size;
+    int sh;
+
+    sh = 1024 - ((bcr >> 6) & 0x3ff);
+    if (sh == 0) {
+        size = -1;
+    } else {
+        size = 8 * M_BYTE * sh;
+    }
+
+    return size;
+}
+
+static void sdram_set_bcr(ppc4xx_sdram_t *sdram,
+                          uint32_t *bcrp, uint32_t bcr, int enabled)
+{
+    unsigned n = bcrp - sdram->bcr;
+
+    if (*bcrp & 1) {
+        /* Unmap RAM */
+#ifdef DEBUG_SDRAM
+        printf("%s: unmap RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n",
+               __func__, sdram_base(*bcrp), sdram_size(*bcrp));
+#endif
+        memory_region_del_subregion(get_system_memory(),
+                                    &sdram->containers[n]);
+        memory_region_del_subregion(&sdram->containers[n],
+                                    &sdram->ram_memories[n]);
+        object_unparent(OBJECT(&sdram->containers[n]));
+    }
+    *bcrp = bcr & 0xFFDEE001;
+    if (enabled && (bcr & 1)) {
+#ifdef DEBUG_SDRAM
+        printf("%s: Map RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n",
+               __func__, sdram_base(bcr), sdram_size(bcr));
+#endif
+        memory_region_init(&sdram->containers[n], NULL, "sdram-containers",
+                           sdram_size(bcr));
+        memory_region_add_subregion(&sdram->containers[n], 0,
+                                    &sdram->ram_memories[n]);
+        memory_region_add_subregion(get_system_memory(),
+                                    sdram_base(bcr),
+                                    &sdram->containers[n]);
+    }
+}
+
+static void sdram_map_bcr(ppc4xx_sdram_t *sdram)
+{
+    int i;
+
+    for (i = 0; i < sdram->nbanks; i++) {
+        if (sdram->ram_sizes[i] != 0) {
+            sdram_set_bcr(sdram,
+                          &sdram->bcr[i],
+                          sdram_bcr(sdram->ram_bases[i], sdram->ram_sizes[i]),
+                          1);
+        } else {
+            sdram_set_bcr(sdram, &sdram->bcr[i], 0, 0);
+        }
+    }
+}
+
+static uint32_t dcr_read_sdram(void *opaque, int dcrn)
+{
+    ppc4xx_sdram_t *sdram;
+    uint32_t ret;
+
+    sdram = opaque;
+#ifdef DEBUG_SDR
+        printf("read DCR[%x(SDRAM)]\n", dcrn);
+#endif
+    switch (dcrn) {
+    case SDRAM_R0BAS:
+    case SDRAM_R1BAS:
+    case SDRAM_R2BAS:
+    case SDRAM_R3BAS:
+        ret = sdram_bcr(sdram->ram_bases[dcrn - SDRAM_R0BAS],
+                        sdram->ram_sizes[dcrn - SDRAM_R0BAS]);
+        break;
+    case SDRAM_CONF1HB:
+    case SDRAM_CONF1LL:
+    case SDRAM_CONFPATHB:
+    case SDRAM_PLBADDULL:
+    case SDRAM_PLBADDUHB:
+        ret = 0;
+        break;
+    case SDRAM0_CFGADDR:
+        ret = sdram->addr;
+#ifdef DEBUG_SDR
+        printf("read DCR[%x(SDRAMADDR)]: %08" PRIx32 "\n", dcrn, ret);
+#endif
+        break;
+    case SDRAM0_CFGDATA:
+        switch (sdram->addr) {
+        case 0x0014: /* SDRAM_MCSTAT (405EX) */
+        case 0x001F:
+            ret = 0x80000000;
+            break;
+        case 0x0021: /* SDRAM_MCOPT2 */
+            ret = 0x08000000;
+            break;
+        case 0x0040: /* SDRAM_MB0CF */
+            ret = 0x00008001;
+            break;
+        case 0x007A: /* SDRAM_DLCR */
+            ret = 0x02000000;
+            break;
+        case 0x00E1: /* SDR0_DDR0 */
+            ret = SDR0_DDR0_DDRM_ENCODE(1) | SDR0_DDR0_DDRM_DDR1;
+            break;
+        default:
+            ret = 0;
+            break;
+        }
+#ifdef DEBUG_SDR
+        printf("read DCR[%x(SDRAMDATA)]: %08" PRIx32 "\n", dcrn, ret);
+#endif
+        break;
+    default:
+        ret = 0;
+        break;
+    }
+
+    return ret;
+}
+
+static void dcr_write_sdram(void *opaque, int dcrn, uint32_t val)
+{
+    ppc4xx_sdram_t *sdram;
+
+    sdram = opaque;
+#ifdef DEBUG_SDR
+        printf("write DCR[%x(SDRAM)]: %08" PRIx32 "\n", dcrn, val);
+#endif
+    switch (dcrn) {
+    case SDRAM_R0BAS:
+    case SDRAM_R1BAS:
+    case SDRAM_R2BAS:
+    case SDRAM_R3BAS:
+    case SDRAM_CONF1HB:
+    case SDRAM_CONF1LL:
+    case SDRAM_CONFPATHB:
+    case SDRAM_PLBADDULL:
+    case SDRAM_PLBADDUHB:
+        break;
+    case SDRAM0_CFGADDR:
+        sdram->addr = val;
+#ifdef DEBUG_SDR
+        printf("write DCR[%x(SDRAMADDR)]: %08" PRIx32 "\n", dcrn, val);
+#endif
+        break;
+    case SDRAM0_CFGDATA:
+#ifdef DEBUG_SDR
+        printf("write DCR[%x(SDRAMDATA)]: %08" PRIx32 "\n", dcrn, val);
+#endif
+        switch (sdram->addr) {
+        case 0x00: /* B0CR */
+            break;
+        default:
+            break;
+        }
+        break;
+    default:
+        break;
+    }
+}
+
+static void sdram_reset(void *opaque)
+{
+    ppc4xx_sdram_t *sdram;
+
+    sdram = opaque;
+    sdram->addr = 0;
+}
+
+static void ppc440_sdram_init(CPUPPCState *env, int nbanks,
+                              MemoryRegion *ram_memories,
+                              hwaddr *ram_bases,
+                              hwaddr *ram_sizes,
+                              int do_init)
+{
+    ppc4xx_sdram_t *sdram;
+
+    sdram = g_malloc0(sizeof(ppc4xx_sdram_t));
+    sdram->nbanks = nbanks;
+    sdram->ram_memories = ram_memories;
+    memcpy(sdram->ram_bases, ram_bases, nbanks * sizeof(hwaddr));
+    memcpy(sdram->ram_sizes, ram_sizes, nbanks * sizeof(hwaddr));
+    qemu_register_reset(&sdram_reset, sdram);
+    ppc_dcr_register(env, SDRAM0_CFGADDR,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+    ppc_dcr_register(env, SDRAM0_CFGDATA,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+    if (do_init) {
+        sdram_map_bcr(sdram);
+    }
+
+    ppc_dcr_register(env, SDRAM_R0BAS,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+    ppc_dcr_register(env, SDRAM_R1BAS,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+    ppc_dcr_register(env, SDRAM_R2BAS,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+    ppc_dcr_register(env, SDRAM_R3BAS,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+    ppc_dcr_register(env, SDRAM_CONF1HB,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+    ppc_dcr_register(env, SDRAM_PLBADDULL,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+    ppc_dcr_register(env, SDRAM_CONF1LL,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+    ppc_dcr_register(env, SDRAM_CONFPATHB,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+    ppc_dcr_register(env, SDRAM_PLBADDUHB,
+                     sdram, &dcr_read_sdram, &dcr_write_sdram);
+}
+
+/*****************************************************************************/
+/* PLB to AHB bridge */
+enum {
+    AHB_TOP    = 0x0A4,
+    AHB_BOT    = 0x0A5,
+};
+
+typedef struct ppc4xx_ahb_t {
+    uint32_t top;
+    uint32_t bot;
+} ppc4xx_ahb_t;
+
+static uint32_t dcr_read_ahb(void *opaque, int dcrn)
+{
+    ppc4xx_ahb_t *ahb;
+    uint32_t ret;
+
+    ahb = opaque;
+    switch (dcrn) {
+    case AHB_TOP:
+        ret = ahb->top;
+        break;
+    case AHB_BOT:
+        ret = ahb->bot;
+        break;
+    default:
+        /* Avoid gcc warning */
+        ret = 0;
+        break;
+    }
+#ifdef DEBUG_AHB
+    printf("read DCR[%x(AHB+%x)]: %08" PRIx32 "\n", dcrn, dcrn - 0xA0, ret);
+#endif
+
+    return ret;
+}
+
+static void dcr_write_ahb(void *opaque, int dcrn, uint32_t val)
+{
+    ppc4xx_ahb_t *ahb;
+
+    ahb = opaque;
+#ifdef DEBUG_AHB
+    printf("write DCR[%x(AHB+%x)]: %08" PRIx32 "\n", dcrn, dcrn - 0xA0, val);
+#endif
+    switch (dcrn) {
+    case AHB_TOP:
+        ahb->top = val;
+        break;
+    case AHB_BOT:
+        ahb->bot = val;
+        break;
+    }
+}
+
+static void ppc4xx_ahb_reset(void *opaque)
+{
+    ppc4xx_ahb_t *ahb;
+
+    ahb = opaque;
+    /* No error */
+    ahb->top = 0;
+    ahb->bot = 0;
+}
+
+static void ppc4xx_ahb_init(CPUPPCState *env)
+{
+    ppc4xx_ahb_t *ahb;
+
+    ahb = g_malloc0(sizeof(ppc4xx_ahb_t));
+    ppc_dcr_register(env, AHB_TOP, ahb, &dcr_read_ahb, &dcr_write_ahb);
+    ppc_dcr_register(env, AHB_BOT, ahb, &dcr_read_ahb, &dcr_write_ahb);
+    qemu_register_reset(ppc4xx_ahb_reset, ahb);
+}
+
+/*****************************************************************************/
+/* PCI Express controller */
+/* This is not complete and not meant to work, only implemented partially
+ * to allow firmware and guests to find an empty bus. Cards should use PCI.
+ */
+#include "hw/pci/pcie_host.h"
+
+#define TYPE_PPC460EX_PCIE_HOST "ppc460ex-pcie-host"
+#define PPC460EX_PCIE_HOST(obj) \
+    OBJECT_CHECK(PPC460EXPCIEState, (obj), TYPE_PPC460EX_PCIE_HOST)
+
+typedef struct PPC460EXPCIEState {
+    PCIExpressHost host;
+
+    MemoryRegion iomem;
+    qemu_irq irq[4];
+    int32_t dcrn_base;
+
+    uint64_t cfg_base;
+    uint32_t cfg_mask;
+    uint64_t msg_base;
+    uint32_t msg_mask;
+    uint64_t omr1_base;
+    uint64_t omr1_mask;
+    uint64_t omr2_base;
+    uint64_t omr2_mask;
+    uint64_t omr3_base;
+    uint64_t omr3_mask;
+    uint64_t reg_base;
+    uint32_t reg_mask;
+    uint32_t special;
+    uint32_t cfg;
+} PPC460EXPCIEState;
+
+#define DCRN_PCIE0_BASE 0x100
+#define DCRN_PCIE1_BASE 0x120
+
+enum {
+    PEGPL_CFGBAH = 0x0,
+    PEGPL_CFGBAL,
+    PEGPL_CFGMSK,
+    PEGPL_MSGBAH,
+    PEGPL_MSGBAL,
+    PEGPL_MSGMSK,
+    PEGPL_OMR1BAH,
+    PEGPL_OMR1BAL,
+    PEGPL_OMR1MSKH,
+    PEGPL_OMR1MSKL,
+    PEGPL_OMR2BAH,
+    PEGPL_OMR2BAL,
+    PEGPL_OMR2MSKH,
+    PEGPL_OMR2MSKL,
+    PEGPL_OMR3BAH,
+    PEGPL_OMR3BAL,
+    PEGPL_OMR3MSKH,
+    PEGPL_OMR3MSKL,
+    PEGPL_REGBAH,
+    PEGPL_REGBAL,
+    PEGPL_REGMSK,
+    PEGPL_SPECIAL,
+    PEGPL_CFG,
+};
+
+#ifdef DEBUG_PCIE
+static void dump_pcie_regs(PPC460EXPCIEState *state)
+{
+    printf("dcrn_base=%x\n", state->dcrn_base);
+    printf("cfg  base=%lx, mask=%x, size=%x\n", state->cfg_base,
+           state->cfg_mask, ~(state->cfg_mask & 0xfffffffe) + 1);
+    printf("msg  base=%lx, mask=%x, size=%x\n", state->msg_base,
+           state->msg_mask, ~(state->msg_mask & 0xfffffffe) + 1);
+    printf("omr1 base=%lx, mask=%lx, size=%"PRIu64"\n", state->omr1_base,
+           state->omr1_mask, ~state->omr1_mask + 1);
+    printf("omr2 base=%lx, mask=%lx, size=%"PRIu64"\n", state->omr2_base,
+           state->omr2_mask, ~state->omr2_mask + 1);
+    printf("omr3 base=%lx, mask=%lx, size=%"PRIu64"\n", state->omr3_base,
+           state->omr3_mask, ~state->omr3_mask + 1);
+    printf("reg  base=%lx, mask=%x, size=%x\n", state->reg_base,
+           state->reg_mask, ~(state->reg_mask & 0xfffffffe) + 1);
+    printf("special=%x, cfg=%x\n", state->special, state->cfg);
+}
+#endif
+
+static uint32_t dcr_read_pcie(void *opaque, int dcrn)
+{
+    uint32_t ret = 0;
+    PPC460EXPCIEState *state = opaque;
+
+    switch (dcrn - state->dcrn_base) {
+    case PEGPL_CFGBAH:
+        ret = state->cfg_base >> 32;
+        break;
+    case PEGPL_CFGBAL:
+        ret = state->cfg_base;
+        break;
+    case PEGPL_CFGMSK:
+        ret = state->cfg_mask;
+        break;
+    case PEGPL_MSGBAH:
+        ret = state->msg_base >> 32;
+        break;
+    case PEGPL_MSGBAL:
+        ret = state->msg_base;
+        break;
+    case PEGPL_MSGMSK:
+        ret = state->msg_mask;
+        break;
+    case PEGPL_OMR1BAH:
+        ret = state->omr1_base >> 32;
+        break;
+    case PEGPL_OMR1BAL:
+        ret = state->omr1_base;
+        break;
+    case PEGPL_OMR1MSKH:
+        ret = state->omr1_mask >> 32;
+        break;
+    case PEGPL_OMR1MSKL:
+        ret = state->omr1_mask;
+        break;
+    case PEGPL_OMR2BAH:
+        ret = state->omr2_base >> 32;
+        break;
+    case PEGPL_OMR2BAL:
+        ret = state->omr2_base;
+        break;
+    case PEGPL_OMR2MSKH:
+        ret = state->omr2_mask >> 32;
+        break;
+    case PEGPL_OMR2MSKL:
+        ret = state->omr3_mask;
+        break;
+    case PEGPL_OMR3BAH:
+        ret = state->omr3_base >> 32;
+        break;
+    case PEGPL_OMR3BAL:
+        ret = state->omr3_base;
+        break;
+    case PEGPL_OMR3MSKH:
+        ret = state->omr3_mask >> 32;
+        break;
+    case PEGPL_OMR3MSKL:
+        ret = state->omr3_mask;
+        break;
+    case PEGPL_REGBAH:
+        ret = state->reg_base >> 32;
+        break;
+    case PEGPL_REGBAL:
+        ret = state->reg_base;
+        break;
+    case PEGPL_REGMSK:
+        ret = state->reg_mask;
+        break;
+    case PEGPL_SPECIAL:
+        ret = state->special;
+        break;
+    case PEGPL_CFG:
+        ret = state->cfg;
+        break;
+    }
+#ifdef DEBUG_PCIE
+        printf("read DCR[%x(PCIE)]: %08" PRIx32 "\n", dcrn, ret);
+#endif
+
+    return ret;
+}
+
+static void dcr_write_pcie(void *opaque, int dcrn, uint32_t val)
+{
+    PPC460EXPCIEState *s = opaque;
+    uint64_t size;
+
+#ifdef DEBUG_PCIE
+    printf("write DCR[%x(PCIE)]: %08" PRIx32 "\n", dcrn, val);
+#endif
+    switch (dcrn - s->dcrn_base) {
+    case PEGPL_CFGBAH:
+        s->cfg_base = ((uint64_t)val << 32) | (s->cfg_base & 0xffffffff);
+        break;
+    case PEGPL_CFGBAL:
+        s->cfg_base = (s->cfg_base & 0xffffffff00000000ULL) | val;
+        break;
+    case PEGPL_CFGMSK:
+        s->cfg_mask = val;
+        size = ~(val & 0xfffffffe) + 1;
+#ifdef DEBUG_PCIE
+        printf("%s: %smapping cfg at %lx/%x (size=%lx)\n", __func__,
+               (val & 1 ? "" : "un"), s->cfg_base, val, size);
+#endif
+        qemu_mutex_lock_iothread();
+        pcie_host_mmcfg_update(PCIE_HOST_BRIDGE(s), val & 1, s->cfg_base, size);
+        qemu_mutex_unlock_iothread();
+        break;
+    case PEGPL_MSGBAH:
+        s->msg_base = ((uint64_t)val << 32) | (s->msg_base & 0xffffffff);
+        break;
+    case PEGPL_MSGBAL:
+        s->msg_base = (s->msg_base & 0xffffffff00000000ULL) | val;
+        break;
+    case PEGPL_MSGMSK:
+        s->msg_mask = val;
+        break;
+    case PEGPL_OMR1BAH:
+        s->omr1_base = ((uint64_t)val << 32) | (s->omr1_base & 0xffffffff);
+        break;
+    case PEGPL_OMR1BAL:
+        s->omr1_base = (s->omr1_base & 0xffffffff00000000ULL) | val;
+        break;
+    case PEGPL_OMR1MSKH:
+        s->omr1_mask = ((uint64_t)val << 32) | (s->omr1_mask & 0xffffffff);
+        break;
+    case PEGPL_OMR1MSKL:
+        s->omr1_mask = (s->omr1_mask & 0xffffffff00000000ULL) | val;
+        break;
+    case PEGPL_OMR2BAH:
+        s->omr2_base = ((uint64_t)val << 32) | (s->omr2_base & 0xffffffff);
+        break;
+    case PEGPL_OMR2BAL:
+        s->omr2_base = (s->omr2_base & 0xffffffff00000000ULL) | val;
+        break;
+    case PEGPL_OMR2MSKH:
+        s->omr2_mask = ((uint64_t)val << 32) | (s->omr2_mask & 0xffffffff);
+        break;
+    case PEGPL_OMR2MSKL:
+        s->omr2_mask = (s->omr2_mask & 0xffffffff00000000ULL) | val;
+        break;
+    case PEGPL_OMR3BAH:
+        s->omr3_base = ((uint64_t)val << 32) | (s->omr3_base & 0xffffffff);
+        break;
+    case PEGPL_OMR3BAL:
+        s->omr3_base = (s->omr3_base & 0xffffffff00000000ULL) | val;
+        break;
+    case PEGPL_OMR3MSKH:
+        s->omr3_mask = ((uint64_t)val << 32) | (s->omr3_mask & 0xffffffff);
+        break;
+    case PEGPL_OMR3MSKL:
+        s->omr3_mask = (s->omr3_mask & 0xffffffff00000000ULL) | val;
+        break;
+    case PEGPL_REGBAH:
+        s->reg_base = ((uint64_t)val << 32) | (s->reg_base & 0xffffffff);
+        break;
+    case PEGPL_REGBAL:
+        s->reg_base = (s->reg_base & 0xffffffff00000000ULL) | val;
+        break;
+    case PEGPL_REGMSK:
+        s->reg_mask = val;
+        /* FIXME: how is size encoded? */
+        size = (val == 0x7001 ? 4096 : ~(val & 0xfffffffe) + 1);
+#ifdef DEBUG_PCIE
+        printf("%s: %smapping reg at %lx/%x (size=%lx)\n", __func__,
+               (val & 1 ? "" : "un"), s->reg_base, val, size);
+#endif
+        break;
+    case PEGPL_SPECIAL:
+        s->special = val;
+        break;
+    case PEGPL_CFG:
+        s->cfg = val;
+#ifdef DEBUG_PCIE
+        dump_pcie_regs(s);
+#endif
+        break;
+    }
+}
+
+static void ppc460ex_set_irq(void *opaque, int irq_num, int level)
+{
+       PPC460EXPCIEState *s = opaque;
+       qemu_set_irq(s->irq[irq_num], level);
+}
+
+static void ppc460ex_pcie_realize(DeviceState *dev, Error **errp)
+{
+    PPC460EXPCIEState *s = PPC460EX_PCIE_HOST(dev);
+    PCIHostState *pci = PCI_HOST_BRIDGE(dev);
+    int i, id;
+    char buf[16];
+
+    switch (s->dcrn_base) {
+    case DCRN_PCIE0_BASE:
+        id = 0;
+        break;
+    case DCRN_PCIE1_BASE:
+        id = 1;
+        break;
+    }
+    snprintf(buf, sizeof(buf), "pcie%d-io", id);
+    memory_region_init(&s->iomem, OBJECT(s), buf, UINT64_MAX);
+    for (i = 0; i < 4; i++) {
+        sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq[i]);
+    }
+    snprintf(buf, sizeof(buf), "pcie.%d", id);
+    pci->bus = pci_register_bus(DEVICE(s), buf, ppc460ex_set_irq,
+                                pci_swizzle_map_irq_fn, s, &s->iomem,
+                                get_system_io(), 0, 4, TYPE_PCIE_BUS);
+}
+
+static Property ppc460ex_pcie_props[] = {
+    DEFINE_PROP_INT32("dcrn-base", PPC460EXPCIEState, dcrn_base, -1),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void ppc460ex_pcie_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+    dc->realize = ppc460ex_pcie_realize;
+    dc->props = ppc460ex_pcie_props;
+    dc->hotpluggable = false;
+}
+
+static const TypeInfo ppc460ex_pcie_host_info = {
+    .name = TYPE_PPC460EX_PCIE_HOST,
+    .parent = TYPE_PCIE_HOST_BRIDGE,
+    .instance_size = sizeof(PPC460EXPCIEState),
+    .class_init = ppc460ex_pcie_class_init,
+};
+
+static void ppc460ex_pcie_register(void)
+{
+    type_register_static(&ppc460ex_pcie_host_info);
+}
+
+type_init(ppc460ex_pcie_register)
+
+static void ppc460ex_pcie_register_dcrs(PPC460EXPCIEState *s, CPUPPCState *env)
+{
+#ifdef DEBUG_PCIE
+    printf("%s: base=%x\n", __func__, s->dcrn_base);
+#endif
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_CFGBAH, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_CFGBAL, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_CFGMSK, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_MSGBAH, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_MSGBAL, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_MSGMSK, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR1BAH, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR1BAL, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR1MSKH, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR1MSKL, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR2BAH, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR2BAL, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR2MSKH, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR2MSKL, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR3BAH, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR3BAL, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR3MSKH, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_OMR3MSKL, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_REGBAH, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_REGBAL, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_REGMSK, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_SPECIAL, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+    ppc_dcr_register(env, s->dcrn_base + PEGPL_CFG, s,
+                     &dcr_read_pcie, &dcr_write_pcie);
+}
+
+static void ppc460ex_pcie_init(CPUPPCState *env)
+{
+    DeviceState *dev;
+
+    dev = qdev_create(NULL, TYPE_PPC460EX_PCIE_HOST);
+    qdev_prop_set_int32(dev, "dcrn-base", DCRN_PCIE0_BASE);
+    qdev_init_nofail(dev);
+    object_property_set_bool(OBJECT(dev), true, "realized", NULL);
+    ppc460ex_pcie_register_dcrs(PPC460EX_PCIE_HOST(dev), env);
+
+    dev = qdev_create(NULL, TYPE_PPC460EX_PCIE_HOST);
+    qdev_prop_set_int32(dev, "dcrn-base", DCRN_PCIE1_BASE);
+    qdev_init_nofail(dev);
+    object_property_set_bool(OBJECT(dev), true, "realized", NULL);
+    ppc460ex_pcie_register_dcrs(PPC460EX_PCIE_HOST(dev), env);
+}
+
+/*****************************************************************************/
+/* SPD eeprom content from mips_malta.c */
+
+struct _eeprom24c0x_t {
+  uint8_t tick;
+  uint8_t address;
+  uint8_t command;
+  uint8_t ack;
+  uint8_t scl;
+  uint8_t sda;
+  uint8_t data;
+  uint8_t contents[256];
+};
+
+typedef struct _eeprom24c0x_t eeprom24c0x_t;
+
+static eeprom24c0x_t spd_eeprom = {
+    .contents = {
+        /* 00000000: */ 0x80, 0x08, 0xFF, 0x0D, 0x0A, 0xFF, 0x40, 0x00,
+        /* 00000008: */ 0x04, 0x75, 0x54, 0x00, 0x82, 0x08, 0x00, 0x01,
+        /* 00000010: */ 0x8F, 0x04, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00,
+        /* 00000018: */ 0x00, 0x00, 0x00, 0x14, 0x0F, 0x14, 0x2D, 0xFF,
+        /* 00000020: */ 0x15, 0x08, 0x15, 0x08, 0x00, 0x00, 0x00, 0x00,
+        /* 00000028: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        /* 00000030: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        /* 00000038: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0xD0,
+        /* 00000040: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        /* 00000048: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        /* 00000050: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        /* 00000058: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        /* 00000060: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        /* 00000068: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        /* 00000070: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        /* 00000078: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x64, 0xF4,
+    },
+};
+
+static void generate_eeprom_spd(uint8_t *eeprom, ram_addr_t ram_size)
+{
+    enum { SDR = 0x4, DDR1 = 0x7, DDR2 = 0x8 } type;
+    uint8_t *spd = spd_eeprom.contents;
+    uint8_t nbanks = 0;
+    uint16_t density = 0;
+    int i;
+
+    /* work in terms of MB */
+    ram_size >>= 20;
+
+    while ((ram_size >= 4) && (nbanks <= 2)) {
+        int sz_log2 = MIN(31 - clz32(ram_size), 14);
+        nbanks++;
+        density |= 1 << (sz_log2 - 2);
+        ram_size -= 1 << sz_log2;
+    }
+
+    /* split to 2 banks if possible */
+    if ((nbanks == 1) && (density > 1)) {
+        nbanks++;
+        density >>= 1;
+    }
+
+    if (density & 0xff00) {
+        density = (density & 0xe0) | ((density >> 8) & 0x1f);
+        type = DDR2;
+    } else if (!(density & 0x1f)) {
+        type = DDR2;
+    } else {
+        type = SDR;
+    }
+
+    if (ram_size) {
+        fprintf(stderr, "Warning: SPD cannot represent final %dMB"
+                " of SDRAM\n", (int)ram_size);
+    }
+
+    /* fill in SPD memory information */
+    spd[2] = type;
+    spd[5] = nbanks;
+    spd[31] = density;
+#ifdef DEBUG_SDRAM
+    printf("SPD: nbanks %d density %d\n", nbanks, density);
+#endif
+    /* XXX: this is totally random */
+    spd[9] = 0x10; /* CAS tcyc */
+    spd[18] = 0x20; /* CAS bit */
+    spd[23] = 0x10; /* CAS tcyc */
+    spd[25] = 0x10; /* CAS tcyc */
+
+    /* checksum */
+    spd[63] = 0;
+    for (i = 0; i < 63; i++) {
+        spd[63] += spd[i];
+    }
+
+    /* copy for SMBUS */
+    memcpy(eeprom, spd, sizeof(spd_eeprom.contents));
+}
+
+static void generate_eeprom_serial(uint8_t *eeprom)
+{
+    int i, pos = 0;
+    uint8_t mac[6] = { 0x00 };
+    uint8_t sn[5] = { 0x01, 0x23, 0x45, 0x67, 0x89 };
+
+    /* version */
+    eeprom[pos++] = 0x01;
+
+    /* count */
+    eeprom[pos++] = 0x02;
+
+    /* MAC address */
+    eeprom[pos++] = 0x01; /* MAC */
+    eeprom[pos++] = 0x06; /* length */
+    memcpy(&eeprom[pos], mac, sizeof(mac));
+    pos += sizeof(mac);
+
+    /* serial number */
+    eeprom[pos++] = 0x02; /* serial */
+    eeprom[pos++] = 0x05; /* length */
+    memcpy(&eeprom[pos], sn, sizeof(sn));
+    pos += sizeof(sn);
+
+    /* checksum */
+    eeprom[pos] = 0;
+    for (i = 0; i < pos; i++) {
+        eeprom[pos] += eeprom[i];
+    }
+}
+
+/*****************************************************************************/
+
+static int sam460ex_load_uboot(void)
+{
+    DriveInfo *dinfo;
+    BlockBackend *blk = NULL;
+    hwaddr base = FLASH_BASE | ((hwaddr)FLASH_BASE_H << 32);
+    long bios_size = FLASH_SIZE;
+    int fl_sectors;
+
+    dinfo = drive_get(IF_PFLASH, 0, 0);
+    if (dinfo) {
+        blk = blk_by_legacy_dinfo(dinfo);
+        bios_size = blk_getlength(blk);
+    }
+    fl_sectors = (bios_size + 65535) >> 16;
+
+    if (!pflash_cfi01_register(base, NULL, "sam460ex.flash", bios_size,
+                               blk, (64 * 1024), fl_sectors,
+                               1, 0x89, 0x18, 0x0000, 0x0, 1)) {
+        fprintf(stderr, "qemu: Error registering flash memory.\n");
+        /* XXX: return an error instead? */
+        exit(1);
+    }
+
+    if (!blk) {
+        /*fprintf(stderr, "No flash image given with the 'pflash' parameter,"
+                " using default u-boot image\n");*/
+        base = UBOOT_LOAD_BASE | ((hwaddr)FLASH_BASE_H << 32);
+        rom_add_file_fixed(UBOOT_FILENAME, base, -1);
+    }
+
+    return 0;
+}
+
+static int sam460ex_load_device_tree(hwaddr addr,
+                                     uint32_t ramsize,
+                                     hwaddr initrd_base,
+                                     hwaddr initrd_size,
+                                     const char *kernel_cmdline)
+{
+    int ret = -1;
+    uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(ramsize) };
+    char *filename;
+    int fdt_size;
+    void *fdt;
+    uint32_t tb_freq = 400000000;
+    uint32_t clock_freq = 400000000;
+
+    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
+    if (!filename) {
+        goto out;
+    }
+    fdt = load_device_tree(filename, &fdt_size);
+    g_free(filename);
+    if (fdt == NULL) {
+        goto out;
+    }
+
+    /* Manipulate device tree in memory. */
+
+    ret = qemu_fdt_setprop(fdt, "/memory", "reg", mem_reg_property,
+                               sizeof(mem_reg_property));
+    if (ret < 0) {
+        fprintf(stderr, "couldn't set /memory/reg\n");
+    }
+
+    /* default FDT doesn't have a /chosen node... */
+    qemu_fdt_add_subnode(fdt, "/chosen");
+
+    ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
+                                    initrd_base);
+    if (ret < 0) {
+        fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");
+    }
+
+    ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
+                                    (initrd_base + initrd_size));
+    if (ret < 0) {
+        fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");
+    }
+
+    ret = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
+                                      kernel_cmdline);
+    if (ret < 0) {
+        fprintf(stderr, "couldn't set /chosen/bootargs\n");
+    }
+
+    /* Copy data from the host device tree into the guest. Since the guest can
+     * directly access the timebase without host involvement, we must expose
+     * the correct frequencies. */
+    if (kvm_enabled()) {
+        tb_freq = kvmppc_get_tbfreq();
+        clock_freq = kvmppc_get_clockfreq();
+    }
+
+    qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",
+                              clock_freq);
+    qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",
+                              tb_freq);
+
+    rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
+    g_free(fdt);
+    ret = fdt_size;
+
+out:
+
+    return ret;
+}
+
+/* Create reset TLB entries for BookE, mapping only the flash memory.  */
+static void mmubooke_create_initial_mapping_uboot(CPUPPCState *env)
+{
+    ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
+
+    /* on reset the flash is mapped by a shadow TLB,
+     * but since we don't implement them we need to use
+     * the same values U-Boot will use to avoid a fault.
+     */
+    tlb->attr = 0;
+    tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
+    tlb->size = 0x10000000; /* up to 0xffffffff  */
+    tlb->EPN = 0xf0000000 & TARGET_PAGE_MASK;
+    tlb->RPN = (0xf0000000 & TARGET_PAGE_MASK) | 0x4;
+    tlb->PID = 0;
+}
+
+/* Create reset TLB entries for BookE, spanning the 32bit addr space.  */
+static void mmubooke_create_initial_mapping(CPUPPCState *env,
+                                     target_ulong va,
+                                     hwaddr pa)
+{
+    ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
+
+    tlb->attr = 0;
+    tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
+    tlb->size = 1 << 31; /* up to 0x80000000  */
+    tlb->EPN = va & TARGET_PAGE_MASK;
+    tlb->RPN = pa & TARGET_PAGE_MASK;
+    tlb->PID = 0;
+}
+
+static void main_cpu_reset(void *opaque)
+{
+    PowerPCCPU *cpu = opaque;
+    CPUPPCState *env = &cpu->env;
+    struct boot_info *bi = env->load_info;
+
+    cpu_reset(CPU(cpu));
+
+    /* either we have a kernel to boot or we jump to U-Boot */
+    if (bi->entry != UBOOT_ENTRY) {
+        env->gpr[1] = (16 << 20) - 8;
+        env->gpr[3] = FDT_ADDR;
+
+        fprintf(stderr, "cpu reset: kernel entry %x\n", bi->entry);
+        env->nip = bi->entry;
+
+        /* Create a mapping for the kernel.  */
+        mmubooke_create_initial_mapping(env, 0, 0);
+        env->gpr[6] = tswap32(EPAPR_MAGIC);
+        env->gpr[7] = (16 << 20) - 8; /*bi->ima_size;*/
+
+    } else {
+        env->nip = UBOOT_ENTRY;
+        mmubooke_create_initial_mapping_uboot(env);
+        fprintf(stderr, "cpu reset: U-Boot entry\n");
+    }
+}
+
+static void sam460ex_init(MachineState *machine)
+{
+    MemoryRegion *address_space_mem = get_system_memory();
+    MemoryRegion *isa = g_new(MemoryRegion, 1);
+    MemoryRegion *ram_memories = g_new(MemoryRegion, SDRAM_NR_BANKS);
+    hwaddr ram_bases[SDRAM_NR_BANKS];
+    hwaddr ram_sizes[SDRAM_NR_BANKS];
+    MemoryRegion *l2cache_ram = g_new(MemoryRegion, 1);
+    qemu_irq *irqs, *uic[4];
+    PCIBus *pci_bus;
+    PowerPCCPU *cpu;
+    CPUPPCState *env;
+    PPC4xxI2CState *i2c[2];
+    hwaddr entry = UBOOT_ENTRY;
+    hwaddr loadaddr = 0;
+    target_long initrd_size = 0;
+    DeviceState *dev;
+    SysBusDevice *sbdev;
+    int success;
+    int i;
+    struct boot_info *boot_info;
+    const size_t smbus_eeprom_size = 8 * 256;
+    uint8_t *smbus_eeprom_buf = g_malloc0(smbus_eeprom_size);
+
+    /* Setup CPU. */
+    if (machine->cpu_model == NULL) {
+        machine->cpu_model = "460EX";
+    }
+    cpu = cpu_ppc_init(machine->cpu_model);
+    if (cpu == NULL) {
+        fprintf(stderr, "Unable to initialize CPU!\n");
+        exit(1);
+    }
+    env = &cpu->env;
+
+    qemu_register_reset(main_cpu_reset, cpu);
+    boot_info = g_malloc0(sizeof(*boot_info));
+    env->load_info = boot_info;
+
+    ppc_booke_timers_init(cpu, 50000000, 0);
+    ppc_dcr_init(env, NULL, NULL);
+
+    /* PLB arbitrer */
+    ppc4xx_plb_init(env);
+
+    /* interrupt controllers */
+    irqs = g_malloc0(sizeof(*irqs) * PPCUIC_OUTPUT_NB);
+    irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
+    irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
+    uic[0] = ppcuic_init(env, irqs, 0x0C0, 0, 1);
+    uic[1] = ppcuic_init(env, &uic[0][30], 0x0D0, 0, 1);
+    uic[2] = ppcuic_init(env, &uic[0][10], 0x0E0, 0, 1);
+    uic[3] = ppcuic_init(env, &uic[0][16], 0x0F0, 0, 1);
+
+    /* SDRAM controller */
+    memset(ram_bases, 0, sizeof(ram_bases));
+    memset(ram_sizes, 0, sizeof(ram_sizes));
+    /* put all RAM on first bank because board has one slot
+     * and firmware only checks that */
+    machine->ram_size = ppc4xx_sdram_adjust(machine->ram_size,
+                                   1/*SDRAM_NR_BANKS*/,
+                                   ram_memories,
+                                   ram_bases, ram_sizes,
+                                   ppc460ex_sdram_bank_sizes);
+#ifdef DEBUG_SDRAM
+    printf("RAMSIZE %dMB\n", (int)(machine->ram_size / M_BYTE));
+#endif
+
+    /* XXX does 460EX have ECC interrupts? */
+    ppc440_sdram_init(env, SDRAM_NR_BANKS, ram_memories,
+                      ram_bases, ram_sizes, 1);
+
+    /* generate SPD EEPROM data */
+    for (i = 0; i < SDRAM_NR_BANKS; i++) {
+#ifdef DEBUG_SDRAM
+        printf("bank %d: %" HWADDR_PRIx "\n", i, ram_sizes[i]);
+#endif
+        generate_eeprom_spd(&smbus_eeprom_buf[i * 256], ram_sizes[i]);
+    }
+    generate_eeprom_serial(&smbus_eeprom_buf[4 * 256]);
+    generate_eeprom_serial(&smbus_eeprom_buf[6 * 256]);
+
+    /* IIC controllers */
+    dev = sysbus_create_simple(TYPE_PPC4xx_I2C, 0x4ef600700, uic[0][2]);
+    i2c[0] = PPC4xx_I2C(dev);
+    object_property_set_bool(OBJECT(dev), true, "realized", NULL);
+    smbus_eeprom_init(i2c[0]->bus, 8, smbus_eeprom_buf, smbus_eeprom_size);
+    g_free(smbus_eeprom_buf);
+
+    dev = sysbus_create_simple(TYPE_PPC4xx_I2C, 0x4ef600800, uic[0][3]);
+    i2c[1] = PPC4xx_I2C(dev);
+
+    /* External bus controller */
+    ppc405_ebc_init(env);
+
+    /* CPR */
+    ppc4xx_cpr_init(env);
+
+    /* PLB to AHB bridge */
+    ppc4xx_ahb_init(env);
+
+    /* System DCRs */
+    ppc4xx_sdr_init(env);
+
+    /* MAL */
+    ppc4xx_mal_init(env, 4, 16, &uic[2][3]);
+
+    /* 256K of L2 cache as memory */
+    ppc4xx_l2sram_init(env);
+    /* FIXME: remove this after fixing l2sram mapping above? */
+    memory_region_init_ram(l2cache_ram, NULL, "ppc440.l2cache_ram", 256 << 10,
+                           &error_abort);
+    memory_region_add_subregion(address_space_mem, 0x400000000LL, l2cache_ram);
+
+    /* USB */
+    sysbus_create_simple(TYPE_PPC4xx_EHCI, 0x4bffd0400, uic[2][29]);
+    dev = qdev_create(NULL, "sysbus-ohci");
+    qdev_prop_set_string(dev, "masterbus", "usb-bus.0");
+    qdev_prop_set_uint32(dev, "num-ports", 6);
+    qdev_init_nofail(dev);
+    sbdev = SYS_BUS_DEVICE(dev);
+    sysbus_mmio_map(sbdev, 0, 0x4bffd0000);
+    sysbus_connect_irq(sbdev, 0, uic[2][30]);
+    usb_create_simple(usb_bus_find(-1), "usb-kbd");
+    usb_create_simple(usb_bus_find(-1), "usb-mouse");
+
+    /* PCI bus */
+    ppc460ex_pcie_init(env);
+    /*XXX: FIXME: is this correct? */
+    dev = sysbus_create_varargs("ppc440-pcix-host", 0xc0ec00000,
+                                uic[1][0], uic[1][20], uic[1][21], uic[1][22],
+                                NULL);
+    pci_bus = (PCIBus *)qdev_get_child_bus(dev, "pci.0");
+    if (!pci_bus) {
+        fprintf(stderr, "couldn't create PCI controller!\n");
+        exit(1);
+    }
+    memory_region_init_alias(isa, NULL, "isa_mmio", get_system_io(),
+                             0, 0x10000);
+    memory_region_add_subregion(get_system_memory(), 0xc08000000, isa);
+
+    /* PCI devices */
+    pci_create_simple(pci_bus, PCI_DEVFN(6, 0), "sm501");
+    /* SoC has a single SATA port but we don't emulate that yet
+     * However, firmware and usual clients have driver for SiI311x
+     * so add one for convenience by default */
+    pci_create_simple(pci_bus, -1, "sii3112");
+
+    /* SoC has 4 UARTs
+     * but board has only one wired and two are present in fdt */
+    if (serial_hds[0] != NULL) {
+        serial_mm_init(address_space_mem, 0x4ef600300, 0, uic[1][1],
+                       PPC_SERIAL_MM_BAUDBASE, serial_hds[0],
+                       DEVICE_BIG_ENDIAN);
+    }
+    if (serial_hds[1] != NULL) {
+        serial_mm_init(address_space_mem, 0x4ef600400, 0, uic[0][1],
+                       PPC_SERIAL_MM_BAUDBASE, serial_hds[1],
+                       DEVICE_BIG_ENDIAN);
+    }
+
+    /* Load U-Boot image. */
+    if (!machine->kernel_filename) {
+        success = sam460ex_load_uboot();
+        if (success < 0) {
+            fprintf(stderr, "qemu: could not load firmware\n");
+            exit(1);
+        }
+    }
+
+    /* Load kernel. */
+    if (machine->kernel_filename) {
+        success = load_uimage(machine->kernel_filename, &entry, &loadaddr, NULL,
+            NULL, NULL);
+        fprintf(stderr, "load_uimage: %d\n", success);
+        if (success < 0) {
+            uint64_t elf_entry, elf_lowaddr;
+
+            success = load_elf(machine->kernel_filename, NULL, NULL, &elf_entry,
+                               &elf_lowaddr, NULL, 1, PPC_ELF_MACHINE, 0, 0);
+            fprintf(stderr, "load_elf: %d\n", success);
+            entry = elf_entry;
+            loadaddr = elf_lowaddr;
+        }
+        /* XXX try again as binary */
+        if (success < 0) {
+            fprintf(stderr, "qemu: could not load kernel '%s'\n",
+                    machine->kernel_filename);
+            exit(1);
+        }
+    }
+
+    /* Load initrd. */
+    if (machine->initrd_filename) {
+        initrd_size = load_image_targphys(machine->initrd_filename,
+                                          RAMDISK_ADDR,
+                                          machine->ram_size - RAMDISK_ADDR);
+        fprintf(stderr, "load_image: %d\n", initrd_size);
+        if (initrd_size < 0) {
+            fprintf(stderr, "qemu: could not load ram disk '%s' at %x\n",
+                    machine->initrd_filename, RAMDISK_ADDR);
+            exit(1);
+        }
+    }
+
+    /* If we're loading a kernel directly, we must load the device tree too. */
+    if (machine->kernel_filename) {
+        int dt_size;
+
+        dt_size = sam460ex_load_device_tree(FDT_ADDR, machine->ram_size,
+                                    RAMDISK_ADDR, initrd_size,
+                                    machine->kernel_cmdline);
+        if (dt_size < 0) {
+            fprintf(stderr, "couldn't load device tree\n");
+            exit(1);
+        }
+
+        boot_info->dt_base = FDT_ADDR;
+        boot_info->dt_size = dt_size;
+    }
+
+    boot_info->entry = entry;
+}
+
+static void sam460ex_machine_init(MachineClass *mc)
+{
+    mc->desc = "aCube Sam460ex";
+    mc->init = sam460ex_init;
+    mc->default_ram_size = 512 * M_BYTE;
+}
+
+DEFINE_MACHINE("sam460ex", sam460ex_machine_init)
diff --git a/include/hw/pci/pcie_host.h b/include/hw/pci/pcie_host.h
index 4d23c80..3f7b988 100644
--- a/include/hw/pci/pcie_host.h
+++ b/include/hw/pci/pcie_host.h
@@ -65,7 +65,7 @@  void pcie_host_mmcfg_update(PCIExpressHost *e,
  * bit 12 - 14: function number
  * bit  0 - 11: offset in configuration space of a given device
  */
-#define PCIE_MMCFG_SIZE_MAX             (1ULL << 28)
+#define PCIE_MMCFG_SIZE_MAX             (1ULL << 29)
 #define PCIE_MMCFG_SIZE_MIN             (1ULL << 20)
 #define PCIE_MMCFG_BUS_BIT              20
 #define PCIE_MMCFG_BUS_MASK             0x1ff