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.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 };
  57
  58 typedef struct GutsState GutsState;
  59
  60 static uint32_t mpc8544_guts_read32(void *opaque, target_phys_addr_t addr)
  61 {
  62     uint32_t value = 0;
  63     CPUState *env = cpu_single_env;
  64
  65     addr &= MPC8544_GUTS_MMIO_SIZE - 1;
  66     switch (addr) {
  67     case MPC8544_GUTS_ADDR_PVR:
  68         value = env->spr[SPR_PVR];
  69         break;
  70     case MPC8544_GUTS_ADDR_SVR:
  71         value = env->spr[SPR_E500_SVR];
  72         break;
  73     default:
  74         fprintf(stderr, "guts: Unknown register read: %x\n", (int)addr);
  75         break;
  76     }
  77
  78     return value;
  79 }
  80
  81 static CPUReadMemoryFunc * const mpc8544_guts_read[] = {
  82     NULL,
  83     NULL,
  84     &mpc8544_guts_read32,
  85 };
  86
  87 static void mpc8544_guts_write32(void *opaque, target_phys_addr_t addr,
  88                               uint32_t value)
  89 {
  90     addr &= MPC8544_GUTS_MMIO_SIZE - 1;
  91
  92     switch (addr) {
  93     case MPC8544_GUTS_ADDR_RSTCR:
  94         if (value & MPC8544_GUTS_RSTCR_RESET) {
  95             qemu_system_reset_request();
  96         }
  97         break;
  98     default:
  99         fprintf(stderr, "guts: Unknown register write: %x = %x\n",
 100                 (int)addr, value);
 101         break;
 102     }
 103 }
 104
 105 static CPUWriteMemoryFunc * const mpc8544_guts_write[] = {
 106     NULL,
 107     NULL,
 108     &mpc8544_guts_write32,
 109 };
 110
 111 static int mpc8544_guts_initfn(SysBusDevice *dev)
 112 {
 113     GutsState *s;
 114     int iomem;
 115
 116     s = FROM_SYSBUS(GutsState, sysbus_from_qdev(dev));
 117
 118     iomem = cpu_register_io_memory(mpc8544_guts_read, mpc8544_guts_write, s,
 119                                    DEVICE_BIG_ENDIAN);
 120     sysbus_init_mmio(dev, MPC8544_GUTS_MMIO_SIZE, iomem);
 121
 122     return 0;
 123 }
 124
 125 static SysBusDeviceInfo mpc8544_guts_info = {
 126     .init         = mpc8544_guts_initfn,
 127     .qdev.name    = "mpc8544-guts",
 128     .qdev.size    = sizeof(GutsState),
 129 };
 130
 131 static void mpc8544_guts_register(void)
 132 {
 133     sysbus_register_withprop(&mpc8544_guts_info);
 134 }
 135 device_init(mpc8544_guts_register);