Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

4 files changed, 322 insertions, 0 deletions

diff --git a/qemu/hw/openrisc/Makefile.objs b/qemu/hw/openrisc/Makefile.objs
new file mode 100644
index 000000000..61246b149
--- /dev/null
+++ b/qemu/hw/openrisc/Makefile.objs
@@ -0,0 +1,2 @@
+obj-y = pic_cpu.o cputimer.o
+obj-y += openrisc_sim.o 
diff --git a/qemu/hw/openrisc/cputimer.c b/qemu/hw/openrisc/cputimer.c
new file mode 100644
index 000000000..9c5494510
--- /dev/null
+++ b/qemu/hw/openrisc/cputimer.c
@@ -0,0 +1,112 @@
+/*
+ * 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 "cpu.h"
+#include "hw/hw.h"
+#include "qemu/timer.h"
+
+#define TIMER_FREQ    (20 * 1000 * 1000)    /* 20MHz */
+
+/* The time when TTCR changes */
+static uint64_t last_clk;
+static int is_counting;
+
+void cpu_openrisc_count_update(OpenRISCCPU *cpu)
+{
+    uint64_t now;
+
+    if (!is_counting) {
+        return;
+    }
+    now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+    cpu->env.ttcr += (uint32_t)muldiv64(now - last_clk, TIMER_FREQ,
+                                        get_ticks_per_sec());
+    last_clk = now;
+}
+
+void cpu_openrisc_timer_update(OpenRISCCPU *cpu)
+{
+    uint32_t wait;
+    uint64_t now, next;
+
+    if (!is_counting) {
+        return;
+    }
+
+    cpu_openrisc_count_update(cpu);
+    now = last_clk;
+
+    if ((cpu->env.ttmr & TTMR_TP) <= (cpu->env.ttcr & TTMR_TP)) {
+        wait = TTMR_TP - (cpu->env.ttcr & TTMR_TP) + 1;
+        wait += cpu->env.ttmr & TTMR_TP;
+    } else {
+        wait = (cpu->env.ttmr & TTMR_TP) - (cpu->env.ttcr & TTMR_TP);
+    }
+    next = now + muldiv64(wait, get_ticks_per_sec(), TIMER_FREQ);
+    timer_mod(cpu->env.timer, next);
+}
+
+void cpu_openrisc_count_start(OpenRISCCPU *cpu)
+{
+    is_counting = 1;
+    cpu_openrisc_count_update(cpu);
+}
+
+void cpu_openrisc_count_stop(OpenRISCCPU *cpu)
+{
+    timer_del(cpu->env.timer);
+    cpu_openrisc_count_update(cpu);
+    is_counting = 0;
+}
+
+static void openrisc_timer_cb(void *opaque)
+{
+    OpenRISCCPU *cpu = opaque;
+
+    if ((cpu->env.ttmr & TTMR_IE) &&
+         timer_expired(cpu->env.timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL))) {
+        CPUState *cs = CPU(cpu);
+
+        cpu->env.ttmr |= TTMR_IP;
+        cs->interrupt_request |= CPU_INTERRUPT_TIMER;
+    }
+
+    switch (cpu->env.ttmr & TTMR_M) {
+    case TIMER_NONE:
+        break;
+    case TIMER_INTR:
+        cpu->env.ttcr = 0;
+        break;
+    case TIMER_SHOT:
+        cpu_openrisc_count_stop(cpu);
+        break;
+    case TIMER_CONT:
+        break;
+    }
+
+    cpu_openrisc_timer_update(cpu);
+}
+
+void cpu_openrisc_clock_init(OpenRISCCPU *cpu)
+{
+    cpu->env.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &openrisc_timer_cb, cpu);
+    cpu->env.ttmr = 0x00000000;
+    cpu->env.ttcr = 0x00000000;
+}
diff --git a/qemu/hw/openrisc/openrisc_sim.c b/qemu/hw/openrisc/openrisc_sim.c
new file mode 100644
index 000000000..1da0657dd
--- /dev/null
+++ b/qemu/hw/openrisc/openrisc_sim.c
@@ -0,0 +1,148 @@
+/*
+ * OpenRISC simulator for use as an IIS.
+ *
+ * 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/hw.h"
+#include "hw/boards.h"
+#include "elf.h"
+#include "hw/char/serial.h"
+#include "net/net.h"
+#include "hw/loader.h"
+#include "exec/address-spaces.h"
+#include "sysemu/sysemu.h"
+#include "hw/sysbus.h"
+#include "sysemu/qtest.h"
+
+#define KERNEL_LOAD_ADDR 0x100
+
+static void main_cpu_reset(void *opaque)
+{
+    OpenRISCCPU *cpu = opaque;
+
+    cpu_reset(CPU(cpu));
+}
+
+static void openrisc_sim_net_init(MemoryRegion *address_space,
+                                  hwaddr base,
+                                  hwaddr descriptors,
+                                  qemu_irq irq, NICInfo *nd)
+{
+    DeviceState *dev;
+    SysBusDevice *s;
+
+    dev = qdev_create(NULL, "open_eth");
+    qdev_set_nic_properties(dev, nd);
+    qdev_init_nofail(dev);
+
+    s = SYS_BUS_DEVICE(dev);
+    sysbus_connect_irq(s, 0, irq);
+    memory_region_add_subregion(address_space, base,
+                                sysbus_mmio_get_region(s, 0));
+    memory_region_add_subregion(address_space, descriptors,
+                                sysbus_mmio_get_region(s, 1));
+}
+
+static void cpu_openrisc_load_kernel(ram_addr_t ram_size,
+                                     const char *kernel_filename,
+                                     OpenRISCCPU *cpu)
+{
+    long kernel_size;
+    uint64_t elf_entry;
+    hwaddr entry;
+
+    if (kernel_filename && !qtest_enabled()) {
+        kernel_size = load_elf(kernel_filename, NULL, NULL,
+                               &elf_entry, NULL, NULL, 1, ELF_MACHINE, 1);
+        entry = elf_entry;
+        if (kernel_size < 0) {
+            kernel_size = load_uimage(kernel_filename,
+                                      &entry, NULL, NULL, NULL, NULL);
+        }
+        if (kernel_size < 0) {
+            kernel_size = load_image_targphys(kernel_filename,
+                                              KERNEL_LOAD_ADDR,
+                                              ram_size - KERNEL_LOAD_ADDR);
+            entry = KERNEL_LOAD_ADDR;
+        }
+
+        if (kernel_size < 0) {
+            fprintf(stderr, "QEMU: couldn't load the kernel '%s'\n",
+                    kernel_filename);
+            exit(1);
+        }
+        cpu->env.pc = entry;
+    }
+}
+
+static void openrisc_sim_init(MachineState *machine)
+{
+    ram_addr_t ram_size = machine->ram_size;
+    const char *cpu_model = machine->cpu_model;
+    const char *kernel_filename = machine->kernel_filename;
+    OpenRISCCPU *cpu = NULL;
+    MemoryRegion *ram;
+    int n;
+
+    if (!cpu_model) {
+        cpu_model = "or1200";
+    }
+
+    for (n = 0; n < smp_cpus; n++) {
+        cpu = cpu_openrisc_init(cpu_model);
+        if (cpu == NULL) {
+            fprintf(stderr, "Unable to find CPU definition!\n");
+            exit(1);
+        }
+        qemu_register_reset(main_cpu_reset, cpu);
+        main_cpu_reset(cpu);
+    }
+
+    ram = g_malloc(sizeof(*ram));
+    memory_region_init_ram(ram, NULL, "openrisc.ram", ram_size, &error_abort);
+    vmstate_register_ram_global(ram);
+    memory_region_add_subregion(get_system_memory(), 0, ram);
+
+    cpu_openrisc_pic_init(cpu);
+    cpu_openrisc_clock_init(cpu);
+
+    serial_mm_init(get_system_memory(), 0x90000000, 0, cpu->env.irq[2],
+                   115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
+
+    if (nd_table[0].used) {
+        openrisc_sim_net_init(get_system_memory(), 0x92000000,
+                              0x92000400, cpu->env.irq[4], nd_table);
+    }
+
+    cpu_openrisc_load_kernel(ram_size, kernel_filename, cpu);
+}
+
+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);
diff --git a/qemu/hw/openrisc/pic_cpu.c b/qemu/hw/openrisc/pic_cpu.c
new file mode 100644
index 000000000..2af1d6013
--- /dev/null
+++ b/qemu/hw/openrisc/pic_cpu.c
@@ -0,0 +1,60 @@
+/*
+ * 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/hw.h"
+#include "cpu.h"
+
+/* OpenRISC pic handler */
+static void openrisc_pic_cpu_handler(void *opaque, int irq, int level)
+{
+    OpenRISCCPU *cpu = (OpenRISCCPU *)opaque;
+    CPUState *cs = CPU(cpu);
+    uint32_t irq_bit;
+
+    if (irq > 31 || irq < 0) {
+        return;
+    }
+
+    irq_bit = 1U << irq;
+
+    if (level) {
+        cpu->env.picsr |= irq_bit;
+    } else {
+        cpu->env.picsr &= ~irq_bit;
+    }
+
+    if (cpu->env.picsr & cpu->env.picmr) {
+        cpu_interrupt(cs, CPU_INTERRUPT_HARD);
+    } else {
+        cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
+        cpu->env.picsr = 0;
+    }
+}
+
+void cpu_openrisc_pic_init(OpenRISCCPU *cpu)
+{
+    int i;
+    qemu_irq *qi;
+    qi = qemu_allocate_irqs(openrisc_pic_cpu_handler, cpu, NR_IRQS);
+
+    for (i = 0; i < NR_IRQS; i++) {
+        cpu->env.irq[i] = qi[i];
+    }
+}