When Linux reboots an e500 VM, it writes to a magic register in the
"global-utilities" device indicated by the device tree. We were not
emulating that device so far, renedering the VM reboot-less.
This patch implements that device with only the reboot functionality
implemented and adds it to the device tree. With this patch applied,
I can successfully reboot a -M mpc8544ds VM.
Signed-off-by: Alexander Graf <ag...@suse.de>
---
Makefile.target | 2 +-
hw/ppce500_mpc8544ds.c | 4 ++
hw/ppce500_util.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++
pc-bios/mpc8544ds.dtb | Bin 12288 -> 2257 bytes
pc-bios/mpc8544ds.dts | 6 +++
5 files changed, 105 insertions(+), 1 deletions(-)
create mode 100644 hw/ppce500_util.c
diff --git a/Makefile.target b/Makefile.target
index 602d50d..3c99bf8 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -258,7 +258,7 @@ endif
obj-ppc-y += ppc4xx_devs.o ppc4xx_pci.o ppc405_uc.o ppc405_boards.o
obj-ppc-y += ppc440.o ppc440_bamboo.o
# PowerPC E500 boards
-obj-ppc-y += ppce500_mpc8544ds.o
+obj-ppc-y += ppce500_mpc8544ds.o ppce500_util.o
# PowerPC 440 Xilinx ML507 reference board.
obj-ppc-y += virtex_ml507.o
obj-ppc-$(CONFIG_KVM) += kvm_ppc.o
diff --git a/hw/ppce500_mpc8544ds.c b/hw/ppce500_mpc8544ds.c
index 6b57fbf..8bcce15 100644
--- a/hw/ppce500_mpc8544ds.c
+++ b/hw/ppce500_mpc8544ds.c
@@ -50,6 +50,7 @@
#define MPC8544_PCI_REGS_SIZE 0x1000
#define MPC8544_PCI_IO 0xE1000000
#define MPC8544_PCI_IOLEN 0x10000
+#define MPC8544_UTIL_BASE (MPC8544_CCSRBAR_BASE + 0xe0000)
struct boot_info
{
@@ -270,6 +271,9 @@ static void mpc8544ds_init(ram_addr_t ram_size,
serial_hds[0], 1, 1);
}
+ /* General Utility device */
+ sysbus_create_simple("e500-util", MPC8544_UTIL_BASE, NULL);
+
/* PCI */
dev = sysbus_create_varargs("e500-pcihost", MPC8544_PCI_REGS_BASE,
mpic[pci_irq_nrs[0]], mpic[pci_irq_nrs[1]],
diff --git a/hw/ppce500_util.c b/hw/ppce500_util.c
new file mode 100644
index 0000000..4440c21
--- /dev/null
+++ b/hw/ppce500_util.c
@@ -0,0 +1,94 @@
+/*
+ * QEMU PowerPC E500 global util pseudo-device
+ *
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author: Alexander Graf, <a...@csgraf.de>
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include "hw.h"
+#include "sysemu.h"
+#include "sysbus.h"
+
+#define E500_UTIL_MMIO_SIZE 0x1000
+#define E500_UTIL_ADDR_RSTCR 0xb0
+#define E500_UTIL_RSTCR_RESET 0x02
+
+struct PPCE500UtilState {
+ SysBusDevice busdev;
+ int mmio_map;
+};
+
+typedef struct PPCE500UtilState PPCE500UtilState;
+
+static uint32_t e500_util_read32(void *opaque, target_phys_addr_t addr)
+{
+ uint32_t value = 0;
+
+ addr &= 0xfff;
+ switch (addr) {
+ default:
+ break;
+ }
+
+ return value;
+}
+
+static CPUReadMemoryFunc * const e500_util_read[] = {
+ NULL,
+ NULL,
+ &e500_util_read32,
+};
+
+static void e500_util_write32(void *opaque, target_phys_addr_t addr,
+ uint32_t value)
+{
+ addr &= 0xfff;
+
+ switch (addr) {
+ case E500_UTIL_ADDR_RSTCR:
+ if (value & E500_UTIL_RSTCR_RESET) {
+ qemu_system_reset_request();
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+static CPUWriteMemoryFunc * const e500_util_write[] = {
+ NULL,
+ NULL,
+ &e500_util_write32,
+};
+
+static int e500_util_initfn(SysBusDevice *dev)
+{
+ PPCE500UtilState *s;
+ int iomem;
+
+ s = FROM_SYSBUS(PPCE500UtilState, sysbus_from_qdev(dev));
+
+ iomem = cpu_register_io_memory(e500_util_read, e500_util_write, s,
+ DEVICE_BIG_ENDIAN);
+ sysbus_init_mmio(dev, E500_UTIL_MMIO_SIZE, iomem);
+
+ return 0;
+}
+
+static SysBusDeviceInfo e500_util_info = {
+ .init = e500_util_initfn,
+ .qdev.name = "e500-util",
+ .qdev.size = sizeof(PPCE500UtilState),
+};
+
+static void e500_pci_register(void)
+{
+ sysbus_register_withprop(&e500_util_info);
+}
+device_init(e500_pci_register);
diff --git a/pc-bios/mpc8544ds.dtb b/pc-bios/mpc8544ds.dtb
index
3299546696bf21f53f8ce2c9eba7fcb740c547da..9a1eba0019ca6eada134650fb0866342fa0066e3
100644
GIT binary patch
delta 254
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t9_P(1to)3Ofs?1OZDx#~Y{00zIh$RZkr!lrMq;sUQE^Ff(d4Ndb^tUEDtiC`
literal 12288
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diff --git a/pc-bios/mpc8544ds.dts b/pc-bios/mpc8544ds.dts
index 872152d..9b95bfd 100644
--- a/pc-bios/mpc8544ds.dts
+++ b/pc-bios/mpc8544ds.dts
@@ -82,6 +82,12 @@
compatible = "chrp,open-pic";
device_type = "open-pic";
};
+
+ global-utilities@e0000 { //global utilities block
+ compatible = "fsl,mpc8548-guts";
+ reg = <0xe0000 0x1000>;
+ fsl,has-rstcr;
+ };
};
pci0: pci@e0008000 {
--
1.6.0.2
