hw/mpc8544_guts.c

   1 /*
   2  * QEMU PowerPC MPC8544 global util pseudo-device
   3  *
   4  * Copyright (C) 2011 Freescale Semiconductor, Inc. All rights reserved.
   5  *
   6  * Author: Alexander Graf, <alex@csgraf.de>
   7  *
   8  * This is free software; you can redistribute it and/or modify
   9  * it under the terms of  the GNU General  Public License as published by
  10  * the Free Software Foundation;  either version 2 of the  License, or
  11  * (at your option) any later version.
  12  *
  13  * *****************************************************************
  14  *
  15  * The documentation for this device is noted in the MPC8544 documentation,
  16  * file name "MPC8544ERM.pdf". You can easily find it on the web.
  17  *
  18  */
  19
  20 #include "hw.h"
  21 #include "sysemu/sysemu.h"
  22 #include "sysbus.h"
  23
  24 #define MPC8544_GUTS_MMIO_SIZE        0x1000
  25 #define MPC8544_GUTS_RSTCR_RESET      0x02
  26
  27 #define MPC8544_GUTS_ADDR_PORPLLSR    0x00
  28 #define MPC8544_GUTS_ADDR_PORBMSR     0x04
  29 #define MPC8544_GUTS_ADDR_PORIMPSCR   0x08
  30 #define MPC8544_GUTS_ADDR_PORDEVSR    0x0C
  31 #define MPC8544_GUTS_ADDR_PORDBGMSR   0x10
  32 #define MPC8544_GUTS_ADDR_PORDEVSR2   0x14
  33 #define MPC8544_GUTS_ADDR_GPPORCR     0x20
  34 #define MPC8544_GUTS_ADDR_GPIOCR      0x30
  35 #define MPC8544_GUTS_ADDR_GPOUTDR     0x40
  36 #define MPC8544_GUTS_ADDR_GPINDR      0x50
  37 #define MPC8544_GUTS_ADDR_PMUXCR      0x60
  38 #define MPC8544_GUTS_ADDR_DEVDISR     0x70
  39 #define MPC8544_GUTS_ADDR_POWMGTCSR   0x80
  40 #define MPC8544_GUTS_ADDR_MCPSUMR     0x90
  41 #define MPC8544_GUTS_ADDR_RSTRSCR     0x94
  42 #define MPC8544_GUTS_ADDR_PVR         0xA0
  43 #define MPC8544_GUTS_ADDR_SVR         0xA4
  44 #define MPC8544_GUTS_ADDR_RSTCR       0xB0
  45 #define MPC8544_GUTS_ADDR_IOVSELSR    0xC0
  46 #define MPC8544_GUTS_ADDR_DDRCSR      0xB20
  47 #define MPC8544_GUTS_ADDR_DDRCDR      0xB24
  48 #define MPC8544_GUTS_ADDR_DDRCLKDR    0xB28
  49 #define MPC8544_GUTS_ADDR_CLKOCR      0xE00
  50 #define MPC8544_GUTS_ADDR_SRDS1CR1    0xF04
  51 #define MPC8544_GUTS_ADDR_SRDS2CR1    0xF10
  52 #define MPC8544_GUTS_ADDR_SRDS2CR3    0xF18
  53
  54 struct GutsState {
  55     SysBusDevice busdev;
  56     MemoryRegion iomem;
  57 };
  58
  59 typedef struct GutsState GutsState;
  60
  61 static uint64_t mpc8544_guts_read(void *opaque, hwaddr addr,
  62                                   unsigned size)
  63 {
  64     uint32_t value = 0;
  65     CPUPPCState *env = cpu_single_env;
  66
  67     addr &= MPC8544_GUTS_MMIO_SIZE - 1;
  68     switch (addr) {
  69     case MPC8544_GUTS_ADDR_PVR:
  70         value = env->spr[SPR_PVR];
  71         break;
  72     case MPC8544_GUTS_ADDR_SVR:
  73         value = env->spr[SPR_E500_SVR];
  74         break;
  75     default:
  76         fprintf(stderr, "guts: Unknown register read: %x\n", (int)addr);
  77         break;
  78     }
  79
  80     return value;
  81 }
  82
  83 static void mpc8544_guts_write(void *opaque, hwaddr addr,
  84                                uint64_t value, unsigned size)
  85 {
  86     addr &= MPC8544_GUTS_MMIO_SIZE - 1;
  87
  88     switch (addr) {
  89     case MPC8544_GUTS_ADDR_RSTCR:
  90         if (value & MPC8544_GUTS_RSTCR_RESET) {
  91             qemu_system_reset_request();
  92         }
  93         break;
  94     default:
  95         fprintf(stderr, "guts: Unknown register write: %x = %x\n",
  96                 (int)addr, (unsigned)value);
  97         break;
  98     }
  99 }
 100
 101 static const MemoryRegionOps mpc8544_guts_ops = {
 102     .read = mpc8544_guts_read,
 103     .write = mpc8544_guts_write,
 104     .endianness = DEVICE_BIG_ENDIAN,
 105     .valid = {
 106         .min_access_size = 4,
 107         .max_access_size = 4,
 108     },
 109 };
 110
 111 static int mpc8544_guts_initfn(SysBusDevice *dev)
 112 {
 113     GutsState *s;
 114
 115     s = FROM_SYSBUS(GutsState, SYS_BUS_DEVICE(dev));
 116
 117     memory_region_init_io(&s->iomem, &mpc8544_guts_ops, s,
 118                           "mpc6544.guts", MPC8544_GUTS_MMIO_SIZE);
 119     sysbus_init_mmio(dev, &s->iomem);
 120
 121     return 0;
 122 }
 123
 124 static void mpc8544_guts_class_init(ObjectClass *klass, void *data)
 125 {
 126     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 127
 128     k->init = mpc8544_guts_initfn;
 129 }
 130
 131 static const TypeInfo mpc8544_guts_info = {
 132     .name          = "mpc8544-guts",
 133     .parent        = TYPE_SYS_BUS_DEVICE,
 134     .instance_size = sizeof(GutsState),
 135     .class_init    = mpc8544_guts_class_init,
 136 };
 137
 138 static void mpc8544_guts_register_types(void)
 139 {
 140     type_register_static(&mpc8544_guts_info);
 141 }
 142
 143 type_init(mpc8544_guts_register_types)