[PATCH rc4 03/29] target/avr: Add migration support

[Aleksandar Markovic <aleksandar.markovic@rt-rk.com>]

From: Michael Rolnik <mrolnik@gmail.com>

Add migration functions for AVR cores.

[AM: Split a larger AVR introduction patch into logical units]
Suggested-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com>

Co-developed-by: Michael Rolnik <mrolnik@gmail.com>
Co-developed-by: Sarah Harris <S.E.Harris@kent.ac.uk>
Signed-off-by: Michael Rolnik <mrolnik@gmail.com>
Signed-off-by: Sarah Harris <S.E.Harris@kent.ac.uk>
Signed-off-by: Michael Rolnik <mrolnik@gmail.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com>
---
 target/avr/cpu.c     |   1 +
 target/avr/cpu.h     |   2 +
 target/avr/machine.c | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 124 insertions(+)
 create mode 100644 target/avr/machine.c

diff --git a/target/avr/cpu.c b/target/avr/cpu.c
index beda91e..49e32af 100644
--- a/target/avr/cpu.c
+++ b/target/avr/cpu.c
@@ -205,6 +205,7 @@ static void avr_cpu_class_init(ObjectClass *oc, void *data)
     cc->set_pc = avr_cpu_set_pc;
     cc->memory_rw_debug = avr_cpu_memory_rw_debug;
     cc->get_phys_page_debug = avr_cpu_get_phys_page_debug;
+    cc->vmsd = &vms_avr_cpu;
     cc->disas_set_info = avr_cpu_disas_set_info;
     cc->tlb_fill = avr_cpu_tlb_fill;
     cc->tcg_initialize = avr_cpu_tcg_init;
diff --git a/target/avr/cpu.h b/target/avr/cpu.h
index 08f4415..2907a37 100644
--- a/target/avr/cpu.h
+++ b/target/avr/cpu.h
@@ -119,6 +119,8 @@ typedef struct AVRCPU {
     CPUAVRState env;
 } AVRCPU;
 
+extern const struct VMStateDescription vms_avr_cpu;
+
 void avr_cpu_do_interrupt(CPUState *cpu);
 bool avr_cpu_exec_interrupt(CPUState *cpu, int int_req);
 hwaddr avr_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
diff --git a/target/avr/machine.c b/target/avr/machine.c
new file mode 100644
index 0000000..ba44bd0
--- /dev/null
+++ b/target/avr/machine.c
@@ -0,0 +1,121 @@
+/*
+ * QEMU AVR CPU
+ *
+ * Copyright (c) 2019 Michael Rolnik
+ *
+ * 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 2.1 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/lgpl-2.1.html>
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "migration/cpu.h"
+
+static int get_sreg(QEMUFile *f, void *opaque, size_t size,
+    const VMStateField *field)
+{
+    CPUAVRState *env = opaque;
+    uint8_t sreg;
+
+    sreg = qemu_get_byte(f);
+    cpu_set_sreg(env, sreg);
+    return 0;
+}
+
+static int put_sreg(
+    QEMUFile *f, void *opaque, size_t size,
+    const VMStateField *field, QJSON *vmdesc)
+{
+    CPUAVRState *env = opaque;
+    uint8_t sreg = cpu_get_sreg(env);
+
+    qemu_put_byte(f, sreg);
+    return 0;
+}
+
+static const VMStateInfo vms_sreg = {
+    .name = "sreg",
+    .get = get_sreg,
+    .put = put_sreg,
+};
+
+static int get_segment(
+    QEMUFile *f, void *opaque, size_t size, const VMStateField *field)
+{
+    uint32_t *ramp = opaque;
+    uint8_t temp;
+
+    temp = qemu_get_byte(f);
+    *ramp = ((uint32_t)temp) << 16;
+    return 0;
+}
+
+static int put_segment(
+    QEMUFile *f, void *opaque, size_t size,
+    const VMStateField *field, QJSON *vmdesc)
+{
+    uint32_t *ramp = opaque;
+    uint8_t temp = *ramp >> 16;
+
+    qemu_put_byte(f, temp);
+    return 0;
+}
+
+static const VMStateInfo vms_rampD = {
+    .name = "rampD",
+    .get = get_segment,
+    .put = put_segment,
+};
+static const VMStateInfo vms_rampX = {
+    .name = "rampX",
+    .get = get_segment,
+    .put = put_segment,
+};
+static const VMStateInfo vms_rampY = {
+    .name = "rampY",
+    .get = get_segment,
+    .put = put_segment,
+};
+static const VMStateInfo vms_rampZ = {
+    .name = "rampZ",
+    .get = get_segment,
+    .put = put_segment,
+};
+static const VMStateInfo vms_eind = {
+    .name = "eind",
+    .get = get_segment,
+    .put = put_segment,
+};
+
+const VMStateDescription vms_avr_cpu = {
+    .name = "cpu",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32(env.pc_w, AVRCPU),
+        VMSTATE_UINT32(env.sp, AVRCPU),
+        VMSTATE_UINT32(env.skip, AVRCPU),
+
+        VMSTATE_UINT32_ARRAY(env.r, AVRCPU, NUMBER_OF_CPU_REGISTERS),
+
+        VMSTATE_SINGLE(env, AVRCPU, 0, vms_sreg, CPUAVRState),
+        VMSTATE_SINGLE(env.rampD, AVRCPU, 0, vms_rampD, uint32_t),
+        VMSTATE_SINGLE(env.rampX, AVRCPU, 0, vms_rampX, uint32_t),
+        VMSTATE_SINGLE(env.rampY, AVRCPU, 0, vms_rampY, uint32_t),
+        VMSTATE_SINGLE(env.rampZ, AVRCPU, 0, vms_rampZ, uint32_t),
+        VMSTATE_SINGLE(env.eind, AVRCPU, 0, vms_eind, uint32_t),
+
+        VMSTATE_END_OF_LIST()
+    }
+};
-- 
2.7.4