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[Qemu-devel] [PATCH v4 4/4] hw/arm: Add opbmc2400, an AST2400 OpenPOWER
From: |
Andrew Jeffery |
Subject: |
[Qemu-devel] [PATCH v4 4/4] hw/arm: Add opbmc2400, an AST2400 OpenPOWER BMC machine |
Date: |
Mon, 14 Mar 2016 14:43:52 +1030 |
The new machine, opbmc2400, is a thin layer over the AST2400
ARM926-based SoC[1]. Between the minimal machine and the current SoC
implementation there is enough functionality to boot an aspeed_defconfig
Linux kernel to userspace.
The machine name is a pragmatic choice, as there doesn't appear to be a
common, formal name for the hardware configuration that isn't generic
(e.g. 'BMC' or 'AST2400').
[1] http://www.aspeedtech.com/products.php?fPath=20&rId=376
Signed-off-by: Andrew Jeffery <address@hidden>
---
Since v3:
* Split the machine from the SoC implementation
I've gone the route of inventing a machine name as it seemed there are very few
cases of appending _soc to the chip name or beginning a machine name with mach_
as an outlet for a lack of creativity. It seems only fair to leave the 'ast2400'
namespace to the SoC itself, as it's unlikely that the OpenPOWER BMC is the
SoC's only consumer. I feel that 'opbmc2400' is a reasonable choice; it's not
overly long, and appending the SoC's marketing number leaves the door open to
future OpenPOWER BMC machines with e.g. the AST2500 series SoC.
Since v2:
* Implement a SOC model to move code out from the machine definition
* Rework the machine to better use QOM
* Include qemu/osdep.h
* Revert back to qemu_log_mask(LOG_UNIMP, ...) in IO handlers
hw/arm/Makefile.objs | 2 +-
hw/arm/opbmc2400.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 67 insertions(+), 1 deletion(-)
create mode 100644 hw/arm/opbmc2400.c
diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
index f333b7f..7b80460 100644
--- a/hw/arm/Makefile.objs
+++ b/hw/arm/Makefile.objs
@@ -16,4 +16,4 @@ obj-$(CONFIG_STM32F205_SOC) += stm32f205_soc.o
obj-$(CONFIG_XLNX_ZYNQMP) += xlnx-zynqmp.o xlnx-ep108.o
obj-$(CONFIG_FSL_IMX25) += fsl-imx25.o imx25_pdk.o
obj-$(CONFIG_FSL_IMX31) += fsl-imx31.o kzm.o
-obj-$(CONFIG_ASPEED_SOC) += ast2400.o
+obj-$(CONFIG_ASPEED_SOC) += ast2400.o opbmc2400.o
diff --git a/hw/arm/opbmc2400.c b/hw/arm/opbmc2400.c
new file mode 100644
index 0000000..a428364
--- /dev/null
+++ b/hw/arm/opbmc2400.c
@@ -0,0 +1,66 @@
+/*
+ * OpenPOWER BMC with AST2400 SoC
+ *
+ * Andrew Jeffery <address@hidden>
+ *
+ * Copyright 2016 IBM Corp.
+ *
+ * This code is licensed under the GPL version 2 or later. See
+ * the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "exec/address-spaces.h"
+#include "hw/arm/arm.h"
+#include "hw/arm/ast2400.h"
+#include "hw/boards.h"
+
+static struct arm_boot_info opbmc2400_binfo = {
+ .loader_start = AST2400_SDRAM_BASE,
+ .board_id = 0,
+ .nb_cpus = 1,
+};
+
+typedef struct OPBMC2400State {
+ AST2400State soc;
+ MemoryRegion ram;
+} OPBMC2400State;
+
+static void opbmc2400_init(MachineState *machine)
+{
+ OPBMC2400State *opbmc2400;
+
+ opbmc2400 = g_new0(OPBMC2400State, 1);
+ object_initialize(&opbmc2400->soc, (sizeof(opbmc2400->soc)), TYPE_AST2400);
+ object_property_add_child(OBJECT(machine), "soc", OBJECT(&opbmc2400->soc),
+ &error_abort);
+
+ memory_region_allocate_system_memory(&opbmc2400->ram, NULL, "ram",
+ ram_size);
+ memory_region_add_subregion(get_system_memory(), AST2400_SDRAM_BASE,
+ &opbmc2400->ram);
+ object_property_add_const_link(OBJECT(&opbmc2400->soc), "ram",
+ OBJECT(&opbmc2400->ram), &error_abort);
+ object_property_set_bool(OBJECT(&opbmc2400->soc), true, "realized",
+ &error_abort);
+
+ opbmc2400_binfo.kernel_filename = machine->kernel_filename;
+ opbmc2400_binfo.initrd_filename = machine->initrd_filename;
+ opbmc2400_binfo.kernel_cmdline = machine->kernel_cmdline;
+ opbmc2400_binfo.ram_size = ram_size;
+ arm_load_kernel(ARM_CPU(first_cpu), &opbmc2400_binfo);
+}
+
+static void opbmc2400_machine_init(MachineClass *mc)
+{
+ mc->desc = "OpenPOWER AST2400 BMC (ARM926EJ-S)";
+ mc->init = opbmc2400_init;
+ mc->max_cpus = 1;
+ mc->no_sdcard = 1;
+ mc->no_floppy = 1;
+ mc->no_cdrom = 1;
+ mc->no_sdcard = 1;
+ mc->no_parallel = 1;
+}
+
+DEFINE_MACHINE("opbmc2400", opbmc2400_machine_init);
--
2.5.0
- [Qemu-devel] [PATCH v4 0/4] Add ASPEED AST2400 SoC and OpenPower BMC machine, Andrew Jeffery, 2016/03/14
- [Qemu-devel] [PATCH v4 2/4] hw/intc: Add (new) ASPEED VIC device model, Andrew Jeffery, 2016/03/14
- [Qemu-devel] [PATCH v4 3/4] hw/arm: Add ASPEED AST2400 SoC model, Andrew Jeffery, 2016/03/14
- [Qemu-devel] [PATCH v4 4/4] hw/arm: Add opbmc2400, an AST2400 OpenPOWER BMC machine,
Andrew Jeffery <=
- [Qemu-devel] [PATCH v4 1/4] hw/timer: Add ASPEED timer device model, Andrew Jeffery, 2016/03/14
- Re: [Qemu-devel] [PATCH v4 0/4] Add ASPEED AST2400 SoC and OpenPower BMC machine, Jeremy Kerr, 2016/03/15