target/avr/machine.c

   1 /*
   2  * QEMU AVR CPU
   3  *
   4  * Copyright (c) 2016-2020 Michael Rolnik
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see
  18  * <http://www.gnu.org/licenses/lgpl-2.1.html>
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "cpu.h"
  23 #include "migration/cpu.h"
  24
  25 static int get_sreg(QEMUFile *f, void *opaque, size_t size,
  26                     const VMStateField *field)
  27 {
  28     CPUAVRState *env = opaque;
  29     uint8_t sreg;
  30
  31     sreg = qemu_get_byte(f);
  32     cpu_set_sreg(env, sreg);
  33     return 0;
  34 }
  35
  36 static int put_sreg(QEMUFile *f, void *opaque, size_t size,
  37                     const VMStateField *field, JSONWriter *vmdesc)
  38 {
  39     CPUAVRState *env = opaque;
  40     uint8_t sreg = cpu_get_sreg(env);
  41
  42     qemu_put_byte(f, sreg);
  43     return 0;
  44 }
  45
  46 static const VMStateInfo vms_sreg = {
  47     .name = "sreg",
  48     .get = get_sreg,
  49     .put = put_sreg,
  50 };
  51
  52 static int get_segment(QEMUFile *f, void *opaque, size_t size,
  53                        const VMStateField *field)
  54 {
  55     uint32_t *ramp = opaque;
  56     uint8_t temp;
  57
  58     temp = qemu_get_byte(f);
  59     *ramp = ((uint32_t)temp) << 16;
  60     return 0;
  61 }
  62
  63 static int put_segment(QEMUFile *f, void *opaque, size_t size,
  64                        const VMStateField *field, JSONWriter *vmdesc)
  65 {
  66     uint32_t *ramp = opaque;
  67     uint8_t temp = *ramp >> 16;
  68
  69     qemu_put_byte(f, temp);
  70     return 0;
  71 }
  72
  73 static const VMStateInfo vms_rampD = {
  74     .name = "rampD",
  75     .get = get_segment,
  76     .put = put_segment,
  77 };
  78 static const VMStateInfo vms_rampX = {
  79     .name = "rampX",
  80     .get = get_segment,
  81     .put = put_segment,
  82 };
  83 static const VMStateInfo vms_rampY = {
  84     .name = "rampY",
  85     .get = get_segment,
  86     .put = put_segment,
  87 };
  88 static const VMStateInfo vms_rampZ = {
  89     .name = "rampZ",
  90     .get = get_segment,
  91     .put = put_segment,
  92 };
  93 static const VMStateInfo vms_eind = {
  94     .name = "eind",
  95     .get = get_segment,
  96     .put = put_segment,
  97 };
  98
  99 const VMStateDescription vms_avr_cpu = {
 100     .name = "cpu",
 101     .version_id = 1,
 102     .minimum_version_id = 1,
 103     .fields = (VMStateField[]) {
 104         VMSTATE_UINT32(env.pc_w, AVRCPU),
 105         VMSTATE_UINT32(env.sp, AVRCPU),
 106         VMSTATE_UINT32(env.skip, AVRCPU),
 107
 108         VMSTATE_UINT32_ARRAY(env.r, AVRCPU, NUMBER_OF_CPU_REGISTERS),
 109
 110         VMSTATE_SINGLE(env, AVRCPU, 0, vms_sreg, CPUAVRState),
 111         VMSTATE_SINGLE(env.rampD, AVRCPU, 0, vms_rampD, uint32_t),
 112         VMSTATE_SINGLE(env.rampX, AVRCPU, 0, vms_rampX, uint32_t),
 113         VMSTATE_SINGLE(env.rampY, AVRCPU, 0, vms_rampY, uint32_t),
 114         VMSTATE_SINGLE(env.rampZ, AVRCPU, 0, vms_rampZ, uint32_t),
 115         VMSTATE_SINGLE(env.eind, AVRCPU, 0, vms_eind, uint32_t),
 116
 117         VMSTATE_END_OF_LIST()
 118     }
 119 };