hw/arm_sysctl.c

   1 /*
   2  * Status and system control registers for ARM RealView/Versatile boards.
   3  *
   4  * Copyright (c) 2006-2007 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licenced under the GPL.
   8  */
   9
  10 #include "sysbus.h"
  11 #include "primecell.h"
  12 #include "sysemu.h"
  13
  14 #define LOCK_VALUE 0xa05f
  15
  16 typedef struct {
  17     SysBusDevice busdev;
  18     uint32_t sys_id;
  19     uint32_t leds;
  20     uint16_t lockval;
  21     uint32_t cfgdata1;
  22     uint32_t cfgdata2;
  23     uint32_t flags;
  24     uint32_t nvflags;
  25     uint32_t resetlevel;
  26 } arm_sysctl_state;
  27
  28 static uint32_t arm_sysctl_read(void *opaque, target_phys_addr_t offset)
  29 {
  30     arm_sysctl_state *s = (arm_sysctl_state *)opaque;
  31
  32     switch (offset) {
  33     case 0x00: /* ID */
  34         return s->sys_id;
  35     case 0x04: /* SW */
  36         /* General purpose hardware switches.
  37            We don't have a useful way of exposing these to the user.  */
  38         return 0;
  39     case 0x08: /* LED */
  40         return s->leds;
  41     case 0x20: /* LOCK */
  42         return s->lockval;
  43     case 0x0c: /* OSC0 */
  44     case 0x10: /* OSC1 */
  45     case 0x14: /* OSC2 */
  46     case 0x18: /* OSC3 */
  47     case 0x1c: /* OSC4 */
  48     case 0x24: /* 100HZ */
  49         /* ??? Implement these.  */
  50         return 0;
  51     case 0x28: /* CFGDATA1 */
  52         return s->cfgdata1;
  53     case 0x2c: /* CFGDATA2 */
  54         return s->cfgdata2;
  55     case 0x30: /* FLAGS */
  56         return s->flags;
  57     case 0x38: /* NVFLAGS */
  58         return s->nvflags;
  59     case 0x40: /* RESETCTL */
  60         return s->resetlevel;
  61     case 0x44: /* PCICTL */
  62         return 1;
  63     case 0x48: /* MCI */
  64         return 0;
  65     case 0x4c: /* FLASH */
  66         return 0;
  67     case 0x50: /* CLCD */
  68         return 0x1000;
  69     case 0x54: /* CLCDSER */
  70         return 0;
  71     case 0x58: /* BOOTCS */
  72         return 0;
  73     case 0x5c: /* 24MHz */
  74         /* ??? not implemented.  */
  75         return 0;
  76     case 0x60: /* MISC */
  77         return 0;
  78     case 0x84: /* PROCID0 */
  79         /* ??? Don't know what the proper value for the core tile ID is.  */
  80         return 0x02000000;
  81     case 0x88: /* PROCID1 */
  82         return 0xff000000;
  83     case 0x64: /* DMAPSR0 */
  84     case 0x68: /* DMAPSR1 */
  85     case 0x6c: /* DMAPSR2 */
  86     case 0x70: /* IOSEL */
  87     case 0x74: /* PLDCTL */
  88     case 0x80: /* BUSID */
  89     case 0x8c: /* OSCRESET0 */
  90     case 0x90: /* OSCRESET1 */
  91     case 0x94: /* OSCRESET2 */
  92     case 0x98: /* OSCRESET3 */
  93     case 0x9c: /* OSCRESET4 */
  94     case 0xc0: /* SYS_TEST_OSC0 */
  95     case 0xc4: /* SYS_TEST_OSC1 */
  96     case 0xc8: /* SYS_TEST_OSC2 */
  97     case 0xcc: /* SYS_TEST_OSC3 */
  98     case 0xd0: /* SYS_TEST_OSC4 */
  99         return 0;
 100     default:
 101         printf ("arm_sysctl_read: Bad register offset 0x%x\n", (int)offset);
 102         return 0;
 103     }
 104 }
 105
 106 static void arm_sysctl_write(void *opaque, target_phys_addr_t offset,
 107                           uint32_t val)
 108 {
 109     arm_sysctl_state *s = (arm_sysctl_state *)opaque;
 110
 111     switch (offset) {
 112     case 0x08: /* LED */
 113         s->leds = val;
 114     case 0x0c: /* OSC0 */
 115     case 0x10: /* OSC1 */
 116     case 0x14: /* OSC2 */
 117     case 0x18: /* OSC3 */
 118     case 0x1c: /* OSC4 */
 119         /* ??? */
 120         break;
 121     case 0x20: /* LOCK */
 122         if (val == LOCK_VALUE)
 123             s->lockval = val;
 124         else
 125             s->lockval = val & 0x7fff;
 126         break;
 127     case 0x28: /* CFGDATA1 */
 128         /* ??? Need to implement this.  */
 129         s->cfgdata1 = val;
 130         break;
 131     case 0x2c: /* CFGDATA2 */
 132         /* ??? Need to implement this.  */
 133         s->cfgdata2 = val;
 134         break;
 135     case 0x30: /* FLAGSSET */
 136         s->flags |= val;
 137         break;
 138     case 0x34: /* FLAGSCLR */
 139         s->flags &= ~val;
 140         break;
 141     case 0x38: /* NVFLAGSSET */
 142         s->nvflags |= val;
 143         break;
 144     case 0x3c: /* NVFLAGSCLR */
 145         s->nvflags &= ~val;
 146         break;
 147     case 0x40: /* RESETCTL */
 148         if (s->lockval == LOCK_VALUE) {
 149             s->resetlevel = val;
 150             if (val & 0x100)
 151                 qemu_system_reset_request ();
 152         }
 153         break;
 154     case 0x44: /* PCICTL */
 155         /* nothing to do.  */
 156         break;
 157     case 0x4c: /* FLASH */
 158     case 0x50: /* CLCD */
 159     case 0x54: /* CLCDSER */
 160     case 0x64: /* DMAPSR0 */
 161     case 0x68: /* DMAPSR1 */
 162     case 0x6c: /* DMAPSR2 */
 163     case 0x70: /* IOSEL */
 164     case 0x74: /* PLDCTL */
 165     case 0x80: /* BUSID */
 166     case 0x84: /* PROCID0 */
 167     case 0x88: /* PROCID1 */
 168     case 0x8c: /* OSCRESET0 */
 169     case 0x90: /* OSCRESET1 */
 170     case 0x94: /* OSCRESET2 */
 171     case 0x98: /* OSCRESET3 */
 172     case 0x9c: /* OSCRESET4 */
 173         break;
 174     default:
 175         printf ("arm_sysctl_write: Bad register offset 0x%x\n", (int)offset);
 176         return;
 177     }
 178 }
 179
 180 static CPUReadMemoryFunc *arm_sysctl_readfn[] = {
 181    arm_sysctl_read,
 182    arm_sysctl_read,
 183    arm_sysctl_read
 184 };
 185
 186 static CPUWriteMemoryFunc *arm_sysctl_writefn[] = {
 187    arm_sysctl_write,
 188    arm_sysctl_write,
 189    arm_sysctl_write
 190 };
 191
 192 static void arm_sysctl_init1(SysBusDevice *dev)
 193 {
 194     arm_sysctl_state *s = FROM_SYSBUS(arm_sysctl_state, dev);
 195     int iomemtype;
 196
 197     s->sys_id = qdev_get_prop_int(&dev->qdev, "sys_id", 0);
 198     /* The MPcore bootloader uses these flags to start secondary CPUs.
 199        We don't use a bootloader, so do this here.  */
 200     s->flags = 3;
 201     iomemtype = cpu_register_io_memory(0, arm_sysctl_readfn,
 202                                        arm_sysctl_writefn, s);
 203     sysbus_init_mmio(dev, 0x1000, iomemtype);
 204     /* ??? Save/restore.  */
 205 }
 206
 207 /* Legacy helper function.  */
 208 void arm_sysctl_init(uint32_t base, uint32_t sys_id)
 209 {
 210     DeviceState *dev;
 211
 212     dev = qdev_create(NULL, "realview_sysctl");
 213     qdev_set_prop_int(dev, "sys_id", sys_id);
 214     qdev_init(dev);
 215     sysbus_mmio_map(sysbus_from_qdev(dev), 0, base);
 216 }
 217
 218 static void arm_sysctl_register_devices(void)
 219 {
 220     sysbus_register_dev("realview_sysctl", sizeof(arm_sysctl_state),
 221                         arm_sysctl_init1);
 222 }
 223
 224 device_init(arm_sysctl_register_devices)