[Qemu-devel] [PATCH v2 2/2] Add Marin SoC support

[Anthony Green]

And here is the base SoC support...

Signed-off-by: Anthony Green <address@hidden>
---
 hw/moxie/Makefile.objs |   2 +-
 hw/moxie/marin.c       | 166 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 167 insertions(+), 1 deletion(-)
 create mode 100644 hw/moxie/marin.c

diff --git a/hw/moxie/Makefile.objs b/hw/moxie/Makefile.objs
index bfc9001..4fa3b30 100644
--- a/hw/moxie/Makefile.objs
+++ b/hw/moxie/Makefile.objs
@@ -1,2 +1,2 @@
 # moxie boards
-obj-y += moxiesim.o
+obj-y += moxiesim.o marin.o
diff --git a/hw/moxie/marin.c b/hw/moxie/marin.c
new file mode 100644
index 0000000..09837ae
--- /dev/null
+++ b/hw/moxie/marin.c
@@ -0,0 +1,166 @@
+/*
+ * QEMU/marin SoC emulation
+ *
+ * Emulates the FPGA-hosted Marin SoC
+ *
+ * Copyright (c) 2013 Anthony Green
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to 
deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "hw/sysbus.h"
+#include "hw/hw.h"
+#include "hw/boards.h"
+#include "hw/loader.h"
+#include "exec/address-spaces.h"
+
+typedef struct {
+    uint64_t ram_size;
+    const char *kernel_filename;
+    const char *kernel_cmdline;
+    const char *initrd_filename;
+} LoaderParams;
+
+static void load_kernel(MoxieCPU *cpu, LoaderParams *loader_params)
+{
+    uint64_t entry, kernel_low, kernel_high;
+    long kernel_size;
+    long initrd_size;
+    ram_addr_t initrd_offset;
+
+    kernel_size = load_elf(loader_params->kernel_filename,  NULL, NULL,
+                           &entry, &kernel_low, &kernel_high, 1,
+                           ELF_MACHINE, 0);
+
+    if (!kernel_size) {
+        error_report("Could not load kernel '%s'",
+                     loader_params->kernel_filename);
+        exit(1);
+    }
+
+    /* load initrd */
+    initrd_size = 0;
+    initrd_offset = 0;
+    if (loader_params->initrd_filename) {
+        initrd_size = get_image_size(loader_params->initrd_filename);
+        if (initrd_size > 0) {
+            initrd_offset = (kernel_high + ~TARGET_PAGE_MASK)
+              & TARGET_PAGE_MASK;
+            if (initrd_offset + initrd_size > loader_params->ram_size) {
+                error_report("Memory too small for initial ram disk '%s'",
+                             loader_params->initrd_filename);
+                exit(1);
+            }
+            initrd_size = load_image_targphys(loader_params->initrd_filename,
+                                              initrd_offset,
+                                              ram_size);
+        }
+        if (initrd_size == (target_ulong)-1) {
+            error_report("Could not load initial ram disk '%s'",
+                         loader_params->initrd_filename);
+            exit(1);
+        }
+    }
+}
+
+static void main_cpu_reset(void *opaque)
+{
+    MoxieCPU *cpu = opaque;
+
+    cpu_reset(CPU(cpu));
+}
+
+static inline DeviceState *marin_uart_create(hwaddr base,
+        qemu_irq irq)
+{
+    DeviceState *dev;
+
+    dev = qdev_create(NULL, "marin-uart");
+    qdev_init_nofail(dev);
+    sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
+    sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq);
+
+    return dev;
+}
+
+static void marin_init(QEMUMachineInitArgs *args)
+{
+    MoxieCPU *cpu = NULL;
+    ram_addr_t ram_size = args->ram_size;
+    const char *cpu_model = args->cpu_model;
+    const char *kernel_filename = args->kernel_filename;
+    const char *kernel_cmdline = args->kernel_cmdline;
+    const char *initrd_filename = args->initrd_filename;
+    CPUMoxieState *env;
+    MemoryRegion *address_space_mem = get_system_memory();
+    MemoryRegion *ocram = g_new(MemoryRegion, 1);
+    MemoryRegion *ram = g_new(MemoryRegion, 1);
+    MemoryRegion *rom = g_new(MemoryRegion, 1);
+    hwaddr ram_base = 0x30000000;
+    LoaderParams loader_params;
+
+    /* Init CPUs. */
+    if (cpu_model == NULL) {
+        cpu_model = "MoxieLite-moxie-cpu";
+    }
+    cpu = cpu_moxie_init(cpu_model);
+    if (!cpu) {
+        error_report("Unable to find CPU definition");
+        exit(1);
+    }
+    env = &cpu->env;
+
+    qemu_register_reset(main_cpu_reset, cpu);
+
+    /* Allocate RAM. */
+    memory_region_init_ram(ocram, NULL, "marin-onchip.ram", 0x1000*4);
+    vmstate_register_ram_global(ocram);
+    memory_region_add_subregion(address_space_mem, 0x10000000, ocram);
+
+    memory_region_init_ram(ram, NULL, "marin-external.ram", ram_size);
+    vmstate_register_ram_global(ram);
+    memory_region_add_subregion(address_space_mem, ram_base, ram);
+
+    memory_region_init_ram(rom, NULL, "moxie.rom", 128*0x1000);
+    vmstate_register_ram_global(rom);
+    memory_region_add_subregion(get_system_memory(), 0x1000, rom);
+
+    if (kernel_filename) {
+        loader_params.ram_size = ram_size;
+        loader_params.kernel_filename = kernel_filename;
+        loader_params.kernel_cmdline = kernel_cmdline;
+        loader_params.initrd_filename = initrd_filename;
+        load_kernel(cpu, &loader_params);
+    }
+
+    marin_uart_create(0xF0000008, env->irq[4]);
+}
+
+static QEMUMachine marin_machine = {
+    .name = "marin",
+    .desc = "Marin SoC",
+    .init = marin_init,
+    .is_default = 1,
+};
+
+static void moxie_machine_init(void)
+{
+    qemu_register_machine(&marin_machine);
+}
+
+machine_init(moxie_machine_init)
-- 
1.8.3.1