[Qemu-devel] [PATCH v2 12/17] Openrisc: add a simulator board

[Jia Liu <proljc@gmail.com>]

add a simulator board implement for openrisc.

Signed-off-by: Jia Liu <proljc@gmail.com>
---
 Makefile.target   |    1 +
 hw/openrisc_sim.c |  145 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 146 insertions(+)
 create mode 100644 hw/openrisc_sim.c

diff --git a/Makefile.target b/Makefile.target
index ca03b03..d6eca9b 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -393,6 +393,7 @@ obj-xtensa-y += core-fsf.o
 
 obj-openrisc-y += openrisc_pic.o
 obj-openrisc-y += openrisc_timer.o
+obj-openrisc-y += openrisc_sim.o
 
 main.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
 
diff --git a/hw/openrisc_sim.c b/hw/openrisc_sim.c
new file mode 100644
index 0000000..2605ab9
--- /dev/null
+++ b/hw/openrisc_sim.c
@@ -0,0 +1,145 @@
+/*
+ *  Openrisc simulator for use as an ISS.
+ *
+ *  Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ *                          Feng Gao <gf91597@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw.h"
+#include "openrisc_cpudev.h"
+#include "boards.h"
+#include "elf.h"
+#include "pc.h"
+#include "loader.h"
+#include "exec-memory.h"
+#include "sysemu.h"
+#include "isa.h"
+#include "qtest.h"
+
+#define KERNEL_LOAD_ADDR 0x100
+
+static struct _loaderparams {
+    uint64_t ram_size;
+    const char *kernel_filename;
+    const char *kernel_cmdline;
+    const char *initrd_filename;
+} loaderparams;
+
+static void main_cpu_reset(void *opaque)
+{
+    CPUOpenriscState *env = opaque;
+    cpu_state_reset(env);
+}
+
+static uint64_t openrisc_load_kernel(void)
+{
+    long kernel_size;
+    uint64_t elf_entry;
+    target_phys_addr_t entry;
+
+    if (loaderparams.kernel_filename && !qtest_enabled()) {
+        kernel_size = load_elf(loaderparams.kernel_filename, NULL, NULL,
+                               &elf_entry, NULL, NULL, 1, ELF_MACHINE, 1);
+        entry = elf_entry;
+        if (kernel_size < 0) {
+            kernel_size = load_uimage(loaderparams.kernel_filename,
+                                      &entry, NULL, NULL);
+        }
+        if (kernel_size < 0) {
+            kernel_size = load_image_targphys(loaderparams.kernel_filename,
+                                              KERNEL_LOAD_ADDR,
+                                              ram_size - KERNEL_LOAD_ADDR);
+            entry = KERNEL_LOAD_ADDR;
+        }
+        if (kernel_size < 0) {
+            fprintf(stderr, "qemu: could not load kernel '%s'\n",
+                    loaderparams.kernel_filename);
+            exit(1);
+        }
+
+        if (kernel_size > 0) {
+            return elf_entry;
+        }
+    } else {
+        entry = 0;
+    }
+
+    return entry;
+}
+
+static void openrisc_sim_init(ram_addr_t ram_size,
+                              const char *boot_device,
+                              const char *kernel_filename,
+                              const char *kernel_cmdline,
+                              const char *initrd_filename,
+                              const char *cpu_model)
+{
+    CPUOpenriscState *env;
+    MemoryRegion *ram = g_new(MemoryRegion, 1);
+    qemu_irq *i8259;
+    ISABus *isa_bus;
+
+    if (!cpu_model) {
+        cpu_model = "or1200";
+    }
+    env = cpu_init(cpu_model);
+    if (!env) {
+        fprintf(stderr, "Unable to find CPU definition!\n");
+        exit(1);
+    }
+
+    qemu_register_reset(main_cpu_reset, env);
+    main_cpu_reset(env);
+
+    memory_region_init_ram(ram, "openrisc.ram", ram_size);
+    memory_region_add_subregion(get_system_memory(), 0, ram);
+
+    if (kernel_filename) {
+        loaderparams.ram_size = ram_size;
+        loaderparams.kernel_filename = kernel_filename;
+        loaderparams.kernel_cmdline = kernel_cmdline;
+        env->pc = openrisc_load_kernel();
+    }
+
+    cpu_openrisc_pic_init(env);
+    cpu_openrisc_clock_init(env);
+
+    isa_bus = isa_bus_new(NULL, get_system_io());
+    i8259 = i8259_init(isa_bus, env->irq[3]);
+    isa_bus_irqs(isa_bus, i8259);
+
+    serial_mm_init(get_system_memory(), 0x90000000, 0,
+                   env->irq[2], 115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
+
+    if (nd_table[0].vlan) {
+        isa_ne2000_init(isa_bus, 0x92000000, 4, &nd_table[0]);
+    }
+}
+
+static QEMUMachine openrisc_sim_machine = {
+    .name = "or32-sim",
+    .desc = "or32 simulation",
+    .init = openrisc_sim_init,
+    .max_cpus = 1,
+    .is_default = 1,
+};
+
+static void openrisc_sim_machine_init(void)
+{
+    qemu_register_machine(&openrisc_sim_machine);
+}
+
+machine_init(openrisc_sim_machine_init);
-- 
1.7.9.5