Patchwork [v3,01/16] target-or32: Add target stubs and cpu QOM

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Submitter Jia Liu
Date June 6, 2012, 12:26 p.m.
Message ID <1338985632-29597-2-git-send-email-proljc@gmail.com>
Download mbox | patch
Permalink /patch/163338/
State New
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Jia Liu - June 6, 2012, 12:26 p.m.
Add OpenRISC target stubs and cpu QOM implement.

Signed-off-by: Jia Liu <proljc@gmail.com>
---
 Makefile.target                  |    8 ++
 arch_init.c                      |    2 +
 arch_init.h                      |    1 +
 configure                        |   14 ++-
 cpu-exec.c                       |    2 +
 default-configs/or32-softmmu.mak |    6 +
 elf.h                            |    2 +
 hw/openrisc_cpudev.h             |   29 +++++
 hw/openrisc_pic.c                |   28 +++++
 hw/openrisc_timer.c              |   30 +++++
 poison.h                         |    1 +
 target-openrisc/cpu.c            |  234 ++++++++++++++++++++++++++++++++++
 target-openrisc/cpu.h            |  255 ++++++++++++++++++++++++++++++++++++++
 target-openrisc/intrpt.c         |   30 +++++
 target-openrisc/machine.c        |   30 +++++
 target-openrisc/mmu.c            |   39 ++++++
 target-openrisc/mmu_helper.c     |   43 +++++++
 target-openrisc/translate.c      |   67 ++++++++++
 18 files changed, 819 insertions(+), 2 deletions(-)
 create mode 100644 default-configs/or32-softmmu.mak
 create mode 100644 hw/openrisc_cpudev.h
 create mode 100644 hw/openrisc_pic.c
 create mode 100644 hw/openrisc_timer.c
 create mode 100644 target-openrisc/cpu.c
 create mode 100644 target-openrisc/cpu.h
 create mode 100644 target-openrisc/intrpt.c
 create mode 100644 target-openrisc/machine.c
 create mode 100644 target-openrisc/mmu.c
 create mode 100644 target-openrisc/mmu_helper.c
 create mode 100644 target-openrisc/translate.c

Patch

diff --git a/Makefile.target b/Makefile.target
index 1582904..b20c2d9 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -83,10 +83,14 @@  libobj-$(CONFIG_TCG_INTERPRETER) += tci.o
 libobj-y += fpu/softfloat.o
 ifneq ($(TARGET_BASE_ARCH), sparc)
 ifneq ($(TARGET_BASE_ARCH), alpha)
+ifneq ($(TARGET_BASE_ARCH), openrisc)
 libobj-y += op_helper.o
 endif
 endif
+endif
+ifneq ($(TARGET_BASE_ARCH), openrisc)
 libobj-y += helper.o
+endif
 ifneq ($(TARGET_BASE_ARCH), ppc)
 libobj-y += cpu.o
 endif
@@ -99,6 +103,7 @@  endif
 libobj-$(TARGET_SPARC) += int32_helper.o
 libobj-$(TARGET_SPARC64) += int64_helper.o
 libobj-$(TARGET_ALPHA) += int_helper.o fpu_helper.o sys_helper.o mem_helper.o
+libobj-$(TARGET_OPENRISC) += intrpt.o mmu.o mmu_helper.o
 
 libobj-y += disas.o
 libobj-$(CONFIG_TCI_DIS) += tci-dis.o
@@ -387,6 +392,9 @@  obj-xtensa-y += core-dc232b.o
 obj-xtensa-y += core-dc233c.o
 obj-xtensa-y += core-fsf.o
 
+obj-openrisc-y += openrisc_pic.o
+obj-openrisc-y += openrisc_timer.o
+
 main.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
 
 monitor.o: hmp-commands.h qmp-commands-old.h
diff --git a/arch_init.c b/arch_init.c
index a9e8b74..4b521e5 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -71,6 +71,8 @@  int graphic_depth = 15;
 #define QEMU_ARCH QEMU_ARCH_MICROBLAZE
 #elif defined(TARGET_MIPS)
 #define QEMU_ARCH QEMU_ARCH_MIPS
+#elif defined(TARGET_OPENRISC)
+#define QEMU_ARCH QEMU_ARCH_OPENRISC
 #elif defined(TARGET_PPC)
 #define QEMU_ARCH QEMU_ARCH_PPC
 #elif defined(TARGET_S390X)
diff --git a/arch_init.h b/arch_init.h
index c7cb94a..3dfea3b 100644
--- a/arch_init.h
+++ b/arch_init.h
@@ -16,6 +16,7 @@  enum {
     QEMU_ARCH_SH4 = 1024,
     QEMU_ARCH_SPARC = 2048,
     QEMU_ARCH_XTENSA = 4096,
+    QEMU_ARCH_OPENRISC = 8192,
 };
 
 extern const uint32_t arch_type;
diff --git a/configure b/configure
index 1f338f8..1780884 100755
--- a/configure
+++ b/configure
@@ -924,6 +924,7 @@  mips-softmmu \
 mipsel-softmmu \
 mips64-softmmu \
 mips64el-softmmu \
+or32-softmmu \
 ppc-softmmu \
 ppcemb-softmmu \
 ppc64-softmmu \
@@ -3479,7 +3480,7 @@  target_arch2=`echo $target | cut -d '-' -f 1`
 target_bigendian="no"
 
 case "$target_arch2" in
-  armeb|lm32|m68k|microblaze|mips|mipsn32|mips64|ppc|ppcemb|ppc64|ppc64abi32|s390x|sh4eb|sparc|sparc64|sparc32plus|xtensaeb)
+  armeb|lm32|m68k|microblaze|mips|mipsn32|mips64|or32|ppc|ppcemb|ppc64|ppc64abi32|s390x|sh4eb|sparc|sparc64|sparc32plus|xtensaeb)
   target_bigendian=yes
   ;;
 esac
@@ -3607,6 +3608,11 @@  case "$target_arch2" in
     target_phys_bits=64
     target_long_alignment=8
   ;;
+  or32)
+    TARGET_ARCH=openrisc
+    TARGET_BASE_ARCH=openrisc
+    target_phys_bits=32
+  ;;
   ppc)
     gdb_xml_files="power-core.xml power-fpu.xml power-altivec.xml power-spe.xml"
     target_phys_bits=64
@@ -3678,7 +3684,7 @@  case "$target_arch2" in
 esac
 
 case "$target_arch2" in
-  alpha | sparc*)
+  alpha | or32 | sparc*)
     echo "CONFIG_TCG_PASS_AREG0=y" >> $config_target_mak
   ;;
 esac
@@ -3845,6 +3851,10 @@  for i in $ARCH $TARGET_BASE_ARCH ; do
     echo "CONFIG_MIPS_DIS=y"  >> $config_target_mak
     echo "CONFIG_MIPS_DIS=y"  >> $libdis_config_mak
   ;;
+  or32)
+    echo "CONFIG_OPENRISC_DIS=y"  >> $config_target_mak
+    echo "CONFIG_OPENRISC_DIS=y"  >> $libdis_config_mak
+  ;;
   ppc*)
     echo "CONFIG_PPC_DIS=y"  >> $config_target_mak
     echo "CONFIG_PPC_DIS=y"  >> $libdis_config_mak
diff --git a/cpu-exec.c b/cpu-exec.c
index 0344cd5..ba10db1 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -222,6 +222,7 @@  int cpu_exec(CPUArchState *env)
 #elif defined(TARGET_LM32)
 #elif defined(TARGET_MICROBLAZE)
 #elif defined(TARGET_MIPS)
+#elif defined(TARGET_OPENRISC)
 #elif defined(TARGET_SH4)
 #elif defined(TARGET_CRIS)
 #elif defined(TARGET_S390X)
@@ -620,6 +621,7 @@  int cpu_exec(CPUArchState *env)
               | env->cc_dest | (env->cc_x << 4);
 #elif defined(TARGET_MICROBLAZE)
 #elif defined(TARGET_MIPS)
+#elif defined(TARGET_OPENRISC)
 #elif defined(TARGET_SH4)
 #elif defined(TARGET_ALPHA)
 #elif defined(TARGET_CRIS)
diff --git a/default-configs/or32-softmmu.mak b/default-configs/or32-softmmu.mak
new file mode 100644
index 0000000..7590eed
--- /dev/null
+++ b/default-configs/or32-softmmu.mak
@@ -0,0 +1,6 @@ 
+# Default configuration for or32-softmmu
+
+include pci.mak
+CONFIG_SERIAL=y
+CONFIG_NE2000_ISA=y
+CONFIG_I8259=y
diff --git a/elf.h b/elf.h
index e1422b8..816e35d 100644
--- a/elf.h
+++ b/elf.h
@@ -106,6 +106,8 @@  typedef int64_t  Elf64_Sxword;
 #define EM_H8S          48      /* Hitachi H8S     */
 #define EM_LATTICEMICO32 138    /* LatticeMico32 */
 
+#define EM_OPENRISC     92        /* OpenCores OpenRISC */
+
 #define EM_UNICORE32    110     /* UniCore32 */
 
 /*
diff --git a/hw/openrisc_cpudev.h b/hw/openrisc_cpudev.h
new file mode 100644
index 0000000..01bd422
--- /dev/null
+++ b/hw/openrisc_cpudev.h
@@ -0,0 +1,29 @@ 
+/*
+ *  QEMU OpenRISC CPU device support.
+ *
+ *  Copyright (c) 2011-2012 Jia Liu <proljc@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/>.
+ */
+
+#ifndef HW_OPENRISC_CPUDEV_H
+#define HW_OPENRISC_CPUDEV_H
+
+/* openrisc_pic.c */
+void cpu_openrisc_pic_init(CPUOpenRISCState *env);
+
+/* openrisc_timer.c*/
+void cpu_openrisc_clock_init(CPUOpenRISCState *env);
+
+#endif
diff --git a/hw/openrisc_pic.c b/hw/openrisc_pic.c
new file mode 100644
index 0000000..1c20790
--- /dev/null
+++ b/hw/openrisc_pic.c
@@ -0,0 +1,28 @@ 
+/*
+ *  OpenRISC Programmable Interrupt Controller support.
+ *
+ *  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 "cpu.h"
+
+/* Reset PIC */
+void cpu_openrisc_pic_reset(CPUOpenRISCState *env)
+{
+}
diff --git a/hw/openrisc_timer.c b/hw/openrisc_timer.c
new file mode 100644
index 0000000..df384f6
--- /dev/null
+++ b/hw/openrisc_timer.c
@@ -0,0 +1,30 @@ 
+/*
+ *  QEMU OpenRISC timer support
+ *
+ *  Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ *                          Zhizhou Zhang <etouzh@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 "qemu-timer.h"
+
+/* Reset Timer */
+void cpu_openrisc_timer_reset(CPUOpenRISCState *env)
+{
+    env->ttmr = 0x00000000;
+    env->ttcr = 0x00000000;
+}
diff --git a/poison.h b/poison.h
index d396f20..7d7b23b 100644
--- a/poison.h
+++ b/poison.h
@@ -14,6 +14,7 @@ 
 #pragma GCC poison TARGET_M68K
 #pragma GCC poison TARGET_MIPS
 #pragma GCC poison TARGET_MIPS64
+#pragma GCC poison TARGET_OPENRISC
 #pragma GCC poison TARGET_PPC
 #pragma GCC poison TARGET_PPCEMB
 #pragma GCC poison TARGET_PPC64
diff --git a/target-openrisc/cpu.c b/target-openrisc/cpu.c
new file mode 100644
index 0000000..b958a05
--- /dev/null
+++ b/target-openrisc/cpu.c
@@ -0,0 +1,234 @@ 
+/*
+ *  QEMU OpenRISC CPU
+ *
+ *  Copyright (c) 2012 Jia Liu <proljc@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 "cpu.h"
+#include "qemu-common.h"
+#if !defined(CONFIG_USER_ONLY)
+#include "hw/loader.h"
+#endif
+
+/* CPUClass::reset() */
+static void openrisc_cpu_reset(CPUState *s)
+{
+    OpenRISCCPU *cpu = OPENRISC_CPU(s);
+    OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(cpu);
+    CPUOpenRISCState *env = &cpu->env;
+
+    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+        qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
+        log_cpu_state(env, 0);
+    }
+
+    occ->parent_reset(s);
+
+    memset(env, 0, offsetof(CPUOpenRISCState, breakpoints));
+
+    tlb_flush(env, 1);
+    /*tb_flush(env);    FIXME: Do we need it?  */
+
+    env->pc = 0x100;
+    env->sr = SR_FO | SR_SM;
+    env->exception_index = -1;
+#if !defined(CONFIG_USER_ONLY)
+    cpu_openrisc_timer_reset(env);
+    cpu_openrisc_pic_reset(env);
+#endif
+}
+
+static inline int openrisc_feature(CPUOpenRISCState *env, int feature)
+{
+    return (env->feature & (1u << feature)) != 0;
+}
+
+static inline void set_feature(CPUOpenRISCState *env, int feature)
+{
+    env->feature |= 1u << feature;
+}
+
+void openrisc_cpu_realize(Object *obj, Error **errp)
+{
+    OpenRISCCPU *cpu = OPENRISC_CPU(obj);
+    CPUOpenRISCState *env = &cpu->env;
+    if (openrisc_feature(env, OPENRISC_FEATURE_OR1200)) {
+        set_feature(env, OPENRISC_FEATURE_OB32S);
+        set_feature(env, OPENRISC_FEATURE_OF32S);
+    }
+
+    qemu_init_vcpu(&cpu->env);
+}
+
+static void openrisc_cpu_initfn(Object *obj)
+{
+    OpenRISCCPU *cpu = OPENRISC_CPU(obj);
+    cpu_exec_init(&cpu->env);
+}
+
+/* CPU models */
+static void or1200_initfn(Object *obj)
+{
+    OpenRISCCPU *cpu = OPENRISC_CPU(obj);
+    CPUOpenRISCState *env = &cpu->env;
+
+    set_feature(env, OPENRISC_FEATURE_OR1200);
+
+    cpu_reset(CPU(cpu));
+
+}
+
+static void openrisc_any_initfn(Object *obj)
+{
+    OpenRISCCPU *cpu = OPENRISC_CPU(obj);
+    CPUOpenRISCState *env = &cpu->env;
+
+    set_feature(env, OPENRISC_FEATURE_OB32S);
+    set_feature(env, OPENRISC_FEATURE_OF32S);
+
+    cpu_reset(CPU(cpu));
+}
+
+typedef struct OpenRISCCPUInfo {
+    const char *name;
+    void (*initfn)(Object *obj);
+} OpenRISCCPUInfo;
+
+static const OpenRISCCPUInfo openrisc_cpus[] = {
+    { .name = "or1200",      .initfn = or1200_initfn },
+    { .name = "any",         .initfn = openrisc_any_initfn },
+};
+
+static void openrisc_cpu_class_init(ObjectClass *oc, void *data)
+{
+    OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc);
+    CPUClass *cc = CPU_CLASS(occ);
+
+    occ->parent_reset = cc->reset;
+    cc->reset = openrisc_cpu_reset;
+}
+
+static void cpu_register(const OpenRISCCPUInfo *info)
+{
+    TypeInfo type_info = {
+        .name = info->name,
+        .parent = TYPE_OPENRISC_CPU,
+        .instance_size = sizeof(OpenRISCCPU),
+        .instance_init = info->initfn,
+        .class_size = sizeof(OpenRISCCPUClass),
+    };
+
+    type_register_static(&type_info);
+}
+
+static const TypeInfo openrisc_cpu_type_info = {
+    .name = TYPE_OPENRISC_CPU,
+    .parent = TYPE_CPU,
+    .instance_size = sizeof(OpenRISCCPU),
+    .instance_init = openrisc_cpu_initfn,
+    .abstract = false,
+    .class_size = sizeof(OpenRISCCPUClass),
+    .class_init = openrisc_cpu_class_init,
+};
+
+static void openrisc_cpu_register_types(void)
+{
+    int i;
+
+    type_register_static(&openrisc_cpu_type_info);
+    for (i = 0; i < ARRAY_SIZE(openrisc_cpus); i++) {
+        cpu_register(&openrisc_cpus[i]);
+    }
+}
+
+OpenRISCCPU *cpu_openrisc_init(const char *cpu_model)
+{
+    OpenRISCCPU *cpu;
+    CPUOpenRISCState *env;
+    static int inited;
+    inited = 0;
+
+    if (!object_class_by_name(cpu_model)) {
+        return NULL;
+    }
+    cpu = OPENRISC_CPU(object_new(cpu_model));
+    env = &cpu->env;
+    env->cpu_model_str = cpu_model;
+
+    openrisc_cpu_realize(OBJECT(cpu), NULL);
+
+#if !defined(CONFIG_USER_ONLY)
+    openrisc_mmu_init(env);
+#endif
+
+    if (tcg_enabled() && !inited) {
+        inited = 1;
+        openrisc_translate_init();
+    }
+
+    cpu_reset(CPU(cpu));
+
+    return cpu;
+}
+
+typedef struct OpenRISCCPUListState {
+    fprintf_function cpu_fprintf;
+    FILE *file;
+} OpenRISCCPUListState;
+
+/* Sort alphabetically by type name, except for "any". */
+static gint openrisc_cpu_list_compare(gconstpointer a, gconstpointer b)
+{
+    ObjectClass *class_a = (ObjectClass *)a;
+    ObjectClass *class_b = (ObjectClass *)b;
+    const char *name_a, *name_b;
+
+    name_a = object_class_get_name(class_a);
+    name_b = object_class_get_name(class_b);
+    if (strcmp(name_a, "any") == 0) {
+        return 1;
+    } else if (strcmp(name_b, "any") == 0) {
+        return -1;
+    } else {
+        return strcmp(name_a, name_b);
+    }
+}
+
+static void openrisc_cpu_list_entry(gpointer data, gpointer user_data)
+{
+    ObjectClass *oc = data;
+    OpenRISCCPUListState *s = user_data;
+
+    (*s->cpu_fprintf)(s->file, "  %s\n",
+                      object_class_get_name(oc));
+}
+
+void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf)
+{
+    OpenRISCCPUListState s = {
+        .file = f,
+        .cpu_fprintf = cpu_fprintf,
+    };
+    GSList *list;
+
+    list = object_class_get_list(TYPE_OPENRISC_CPU, false);
+    list = g_slist_sort(list, openrisc_cpu_list_compare);
+    (*cpu_fprintf)(f, "Available CPUs:\n");
+    g_slist_foreach(list, openrisc_cpu_list_entry, &s);
+    g_slist_free(list);
+}
+
+type_init(openrisc_cpu_register_types)
diff --git a/target-openrisc/cpu.h b/target-openrisc/cpu.h
new file mode 100644
index 0000000..b5be770
--- /dev/null
+++ b/target-openrisc/cpu.h
@@ -0,0 +1,255 @@ 
+/*
+ *  OpenRISC virtual CPU header.
+ *
+ *  Copyright (c) 2011-2012 Jia Liu <proljc@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/>.
+ */
+
+#ifndef CPU_OPENRISC_H
+#define CPU_OPENRISC_H
+
+#define TARGET_HAS_ICE 1
+
+#define ELF_MACHINE EM_OPENRISC
+
+#define CPUArchState struct CPUOpenRISCState
+
+#define TARGET_LONG_BITS 32
+
+#include "config.h"
+#include "qemu-common.h"
+#include "cpu-defs.h"
+#include "softfloat.h"
+#include "qemu/cpu.h"
+#include "error.h"
+
+struct CPUOpenRISCState;
+
+#define NB_MMU_MODES    3
+
+#define TARGET_PAGE_BITS 13
+
+#define TARGET_PHYS_ADDR_SPACE_BITS 32
+#define TARGET_VIRT_ADDR_SPACE_BITS 32
+
+/* Internel flags, delay slot flag */
+#define D_FLAG    1
+
+/* Verison Register */
+#define SPR_VR       0xffff003f
+#define SPR_CPUCFGR  0x12000001
+
+/* Registers */
+enum {
+    R0 = 0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10,
+    R11, R12, R13, R14, R15, R16, R17, R18, R19, R20,
+    R21, R22, R23, R24, R25, R26, R27, R28, R29, R30,
+    R31
+};
+
+/* Register aliases */
+enum {
+    R_ZERO = R0,
+    R_SP = R1,
+    R_FP = R2,
+    R_LR = R9,
+    R_RV = R11,
+    R_RVH = R12
+};
+
+/* Supervisor register */
+enum {
+    SR_SM = 1,
+    SR_TEE = (1<<1),
+    SR_IEE = (1<<2),
+    SR_DCE = (1<<3),
+    SR_ICE = (1<<4),
+    SR_DME = (1<<5),
+    SR_IME = (1<<6),
+    SR_LEE = (1<<7),
+    SR_CE  = (1<<8),
+    SR_F   = (1<<9),
+    SR_CY  = (1<<10),
+    SR_OV  = (1<<11),
+    SR_OVE = (1<<12),
+    SR_DSX = (1<<13),
+    SR_EPH = (1<<14),
+    SR_FO  = (1<<15),
+    SR_SUMRA = (1<<16),
+    SR_SCE = (1<<17),
+};
+
+/* CPU config reg */
+enum {
+    CPUCFGR_NSGF = (15 << 0),
+    CPUCFGR_CGF = (1 << 4),
+    CPUCFGR_OB32S = (1 << 5),
+    CPUCFGR_OB64S = (1 << 6),
+    CPUCFGR_OF32S = (1 << 7),
+    CPUCFGR_OF64S = (1 << 8),
+    CPUCFGR_OV64S = (1 << 9),
+};
+
+/* Openrisc Hardware Capabilities */
+enum {
+    OPENRISC_FEATURE_NSGF,
+    OPENRISC_FEATURE_CGF,
+    OPENRISC_FEATURE_OB32S,
+    OPENRISC_FEATURE_OB64S,
+    OPENRISC_FEATURE_OF32S,
+    OPENRISC_FEATURE_OF64S,
+    OPENRISC_FEATURE_OV64S,
+    OPENRISC_FEATURE_OR1200,
+};
+
+/* TTMR bit */
+enum {
+    TTMR_TP = (0xfffffff),
+    TTMR_IP = (1<<28),
+    TTMR_IE = (1<<29),
+    TTMR_M  = (3<<30),
+};
+
+typedef struct CPUOpenRISCState CPUOpenRISCState;
+struct CPUOpenRISCState {
+    target_ulong gpr[32];     /* General registers */
+    target_ulong pc;          /* Program counter */
+    target_ulong npc;         /* Next PC */
+    target_ulong ppc;         /* Prev PC */
+    target_ulong jmp_pc;      /* Jump PC */
+
+    uint32_t sr;              /* Supervisor register */
+    uint32_t vr;              /* Version register */
+    uint32_t flags;           /* cpu_flags, we only use it for exception
+                                 in solt so far.  */
+    uint32_t btaken;          /* the SR_F bit */
+
+    CPU_COMMON
+
+#if !defined(CONFIG_USER_ONLY)
+    struct QEMUTimer *timer;
+    uint32_t ttmr;          /* Timer tick mode register */
+    uint32_t ttcr;          /* Timer tick count register */
+
+    uint32_t picmr;         /* Interrupt mask register */
+    uint32_t picsr;         /* Interrupt contrl register*/
+#endif
+    uint32_t feature;       /* CPU Capabilities */
+};
+
+#define TYPE_OPENRISC_CPU "or32-cpu"
+
+#define OPENRISC_CPU_CLASS(klass) \
+    OBJECT_CLASS_CHECK(OpenRISCCPUClass, (klass), TYPE_OPENRISC_CPU)
+#define OPENRISC_CPU(obj) \
+    OBJECT_CHECK(OpenRISCCPU, (obj), TYPE_OPENRISC_CPU)
+#define OPENRISC_CPU_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(OpenRISCCPUClass, (obj), TYPE_OPENRISC_CPU)
+
+/**
+ * OpenRISCCPUClass:
+ * @parent_reset: The parent class' reset handler.
+ *
+ * A OpenRISC CPU model.
+ */
+typedef struct OpenRISCCPUClass {
+    /*< private >*/
+    CPUClass parent_class;
+    /*< public >*/
+
+    void (*parent_reset)(CPUState *cpu);
+} OpenRISCCPUClass;
+
+/**
+ * OpenRISCCPU:
+ * @env: #CPUOpenRISCState
+ *
+ * A OpenRISC CPU.
+ */
+typedef struct OpenRISCCPU {
+    /*< private >*/
+    CPUState parent_obj;
+    /*< public >*/
+
+    CPUOpenRISCState env;
+} OpenRISCCPU;
+
+static inline OpenRISCCPU *openrisc_env_get_cpu(CPUOpenRISCState *env)
+{
+    return OPENRISC_CPU(container_of(env, OpenRISCCPU, env));
+}
+
+#define ENV_GET_CPU(e) CPU(openrisc_env_get_cpu(e))
+
+void openrisc_cpu_realize(Object *obj, Error **errp);
+
+void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf);
+OpenRISCCPU *cpu_openrisc_init(const char *cpu_model);
+int cpu_openrisc_exec(CPUOpenRISCState *s);
+void do_interrupt(CPUOpenRISCState *env);
+void openrisc_translate_init(void);
+
+#define cpu_list cpu_openrisc_list
+#define cpu_exec cpu_openrisc_exec
+#define cpu_gen_code cpu_openrisc_gen_code
+
+#define CPU_SAVE_VERSION 1
+
+#if !defined(CONFIG_USER_ONLY)
+void cpu_openrisc_pic_reset(CPUOpenRISCState *env);
+
+void cpu_openrisc_timer_reset(CPUOpenRISCState *env);
+
+void openrisc_mmu_init(CPUOpenRISCState *env);
+#endif
+
+static inline CPUOpenRISCState *cpu_init(const char *cpu_model)
+{
+    OpenRISCCPU *cpu = cpu_openrisc_init(cpu_model);
+    if (cpu) {
+        return &cpu->env;
+    }
+    return NULL;
+}
+
+#include "cpu-all.h"
+
+static inline void cpu_get_tb_cpu_state(CPUOpenRISCState *env,
+                                        target_ulong *pc,
+                                        target_ulong *cs_base, int *flags)
+{
+    *pc = env->pc;
+    *cs_base = 0;
+    *flags = 0;
+}
+
+static inline int cpu_mmu_index(CPUOpenRISCState *env)
+{
+    return 0;
+}
+
+static inline bool cpu_has_work(CPUOpenRISCState *env)
+{
+    return true;
+}
+
+#include "exec-all.h"
+
+static inline void cpu_pc_from_tb(CPUOpenRISCState *env, TranslationBlock *tb)
+{
+    env->pc = tb->pc;
+}
+
+#endif /* CPU_OPENRISC_H */
diff --git a/target-openrisc/intrpt.c b/target-openrisc/intrpt.c
new file mode 100644
index 0000000..72ee402
--- /dev/null
+++ b/target-openrisc/intrpt.c
@@ -0,0 +1,30 @@ 
+/*
+ *  OpenRISC interrupt.
+ *
+ *  Copyright (c) 2011-2012 Jia Liu <proljc@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 "cpu.h"
+#include "qemu-common.h"
+#include "gdbstub.h"
+#include "host-utils.h"
+#if !defined(CONFIG_USER_ONLY)
+#include "hw/loader.h"
+#endif
+
+void do_interrupt(CPUOpenRISCState *env)
+{
+}
diff --git a/target-openrisc/machine.c b/target-openrisc/machine.c
new file mode 100644
index 0000000..11bf275
--- /dev/null
+++ b/target-openrisc/machine.c
@@ -0,0 +1,30 @@ 
+/*
+ *  OpenRISC Machine
+ *
+ *  Copyright (c) 2011-2012 Jia Liu <proljc@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/hw.h"
+#include "hw/boards.h"
+
+void cpu_save(QEMUFile *f, void *opaque)
+{
+}
+
+int cpu_load(QEMUFile *f, void *opaque, int version_id)
+{
+    return 0;
+}
diff --git a/target-openrisc/mmu.c b/target-openrisc/mmu.c
new file mode 100644
index 0000000..61bcc9a
--- /dev/null
+++ b/target-openrisc/mmu.c
@@ -0,0 +1,39 @@ 
+/*
+ *  OpenRISC MMU.
+ *
+ *  Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ *                          Zhizhou Zhang <etouzh@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 "cpu.h"
+#include "qemu-common.h"
+#include "gdbstub.h"
+#include "host-utils.h"
+#if !defined(CONFIG_USER_ONLY)
+#include "hw/loader.h"
+#endif
+
+#if !defined(CONFIG_USER_ONLY)
+target_phys_addr_t cpu_get_phys_page_debug(CPUOpenRISCState *env,
+                                           target_ulong addr)
+{
+    return 0;
+}
+
+void openrisc_mmu_init(CPUOpenRISCState *env)
+{
+}
+#endif
diff --git a/target-openrisc/mmu_helper.c b/target-openrisc/mmu_helper.c
new file mode 100644
index 0000000..a0acf12
--- /dev/null
+++ b/target-openrisc/mmu_helper.c
@@ -0,0 +1,43 @@ 
+/*
+ *  OpenRISC mmu helper routines
+ *
+ *  Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ *                          Zhizhou Zhang <etouzh@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 "cpu.h"
+
+#if !defined(CONFIG_USER_ONLY)
+#include "softmmu_exec.h"
+#define MMUSUFFIX _mmu
+
+#define SHIFT 0
+#include "softmmu_template.h"
+
+#define SHIFT 1
+#include "softmmu_template.h"
+
+#define SHIFT 2
+#include "softmmu_template.h"
+
+#define SHIFT 3
+#include "softmmu_template.h"
+
+void tlb_fill(CPUOpenRISCState *env, target_ulong addr, int is_write,
+              int mmu_idx, uintptr_t retaddr)
+{
+}
+#endif
diff --git a/target-openrisc/translate.c b/target-openrisc/translate.c
new file mode 100644
index 0000000..61fb1cf
--- /dev/null
+++ b/target-openrisc/translate.c
@@ -0,0 +1,67 @@ 
+/*
+ *  OpenRISC translation
+ *
+ *  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 "cpu.h"
+#include "exec-all.h"
+#include "disas.h"
+#include "tcg-op.h"
+#include "qemu-common.h"
+#include "qemu-log.h"
+#include "config.h"
+
+void openrisc_translate_init(void)
+{
+}
+
+static inline void gen_intermediate_code_internal(CPUOpenRISCState *env,
+                                                  TranslationBlock *tb,
+                                                  int search_pc)
+{
+}
+
+void gen_intermediate_code(CPUOpenRISCState *env, struct TranslationBlock *tb)
+{
+    gen_intermediate_code_internal(env, tb, 0);
+}
+
+void gen_intermediate_code_pc(CPUOpenRISCState *env,
+                              struct TranslationBlock *tb)
+{
+    gen_intermediate_code_internal(env, tb, 1);
+}
+
+void cpu_dump_state(CPUOpenRISCState *env, FILE *f,
+                    fprintf_function cpu_fprintf,
+                    int flags)
+{
+    int i;
+    uint32_t *regs = env->gpr;
+    cpu_fprintf(f, "PC=%08x\n", env->pc);
+    for (i = 0; i < 32; ++i) {
+        cpu_fprintf(f, "R%02d=%08x%c", i, regs[i],
+                    (i % 4) == 3 ? '\n' : ' ');
+    }
+}
+
+void restore_state_to_opc(CPUOpenRISCState *env, TranslationBlock *tb,
+                          int pc_pos)
+{
+    env->pc = gen_opc_pc[pc_pos];
+}