hw/arm_sysctl.c

   1 /*
   2  * Status and system control registers for ARM RealView/Versatile boards.
   3  *
   4  * Copyright (c) 2006 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licenced under the GPL.
   8  */
   9
  10 #include "vl.h"
  11 #include "arm_pic.h"
  12
  13 #define LOCK_VALUE 0xa05f
  14
  15 typedef struct {
  16     uint32_t base;
  17     uint32_t sys_id;
  18     uint32_t leds;
  19     uint16_t lockval;
  20     uint32_t cfgdata1;
  21     uint32_t cfgdata2;
  22     uint32_t flags;
  23     uint32_t nvflags;
  24     uint32_t resetlevel;
  25 } arm_sysctl_state;
  26
  27 static uint32_t arm_sysctl_read(void *opaque, target_phys_addr_t offset)
  28 {
  29     arm_sysctl_state *s = (arm_sysctl_state *)opaque;
  30
  31     offset -= s->base;
  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     offset -= s->base;
 111
 112     switch (offset) {
 113     case 0x08: /* LED */
 114         s->leds = val;
 115     case 0x0c: /* OSC0 */
 116     case 0x10: /* OSC1 */
 117     case 0x14: /* OSC2 */
 118     case 0x18: /* OSC3 */
 119     case 0x1c: /* OSC4 */
 120         /* ??? */
 121         break;
 122     case 0x20: /* LOCK */
 123         if (val == LOCK_VALUE)
 124             s->lockval = val;
 125         else
 126             s->lockval = val & 0x7fff;
 127         break;
 128     case 0x28: /* CFGDATA1 */
 129         /* ??? Need to implement this.  */
 130         s->cfgdata1 = val;
 131         break;
 132     case 0x2c: /* CFGDATA2 */
 133         /* ??? Need to implement this.  */
 134         s->cfgdata2 = val;
 135         break;
 136     case 0x30: /* FLAGSSET */
 137         s->flags |= val;
 138         break;
 139     case 0x34: /* FLAGSCLR */
 140         s->flags &= ~val;
 141         break;
 142     case 0x38: /* NVFLAGSSET */
 143         s->nvflags |= val;
 144         break;
 145     case 0x3c: /* NVFLAGSCLR */
 146         s->nvflags &= ~val;
 147         break;
 148     case 0x40: /* RESETCTL */
 149         if (s->lockval == LOCK_VALUE) {
 150             s->resetlevel = val;
 151             if (val & 0x100)
 152                 qemu_system_reset_request ();
 153         }
 154         break;
 155     case 0x44: /* PCICTL */
 156         /* nothing to do.  */
 157         break;
 158     case 0x4c: /* FLASH */
 159     case 0x50: /* CLCD */
 160     case 0x54: /* CLCDSER */
 161     case 0x64: /* DMAPSR0 */
 162     case 0x68: /* DMAPSR1 */
 163     case 0x6c: /* DMAPSR2 */
 164     case 0x70: /* IOSEL */
 165     case 0x74: /* PLDCTL */
 166     case 0x80: /* BUSID */
 167     case 0x84: /* PROCID0 */
 168     case 0x88: /* PROCID1 */
 169     case 0x8c: /* OSCRESET0 */
 170     case 0x90: /* OSCRESET1 */
 171     case 0x94: /* OSCRESET2 */
 172     case 0x98: /* OSCRESET3 */
 173     case 0x9c: /* OSCRESET4 */
 174         break;
 175     default:
 176         printf ("arm_sysctl_write: Bad register offset 0x%x\n", (int)offset);
 177         return;
 178     }
 179 }
 180
 181 static CPUReadMemoryFunc *arm_sysctl_readfn[] = {
 182    arm_sysctl_read,
 183    arm_sysctl_read,
 184    arm_sysctl_read
 185 };
 186
 187 static CPUWriteMemoryFunc *arm_sysctl_writefn[] = {
 188    arm_sysctl_write,
 189    arm_sysctl_write,
 190    arm_sysctl_write
 191 };
 192
 193 void arm_sysctl_init(uint32_t base, uint32_t sys_id)
 194 {
 195     arm_sysctl_state *s;
 196     int iomemtype;
 197
 198     s = (arm_sysctl_state *)qemu_mallocz(sizeof(arm_sysctl_state));
 199     if (!s)
 200         return;
 201     s->base = base;
 202     s->sys_id = sys_id;
 203     iomemtype = cpu_register_io_memory(0, arm_sysctl_readfn,
 204                                        arm_sysctl_writefn, s);
 205     cpu_register_physical_memory(base, 0x00001000, iomemtype);
 206     /* ??? Save/restore.  */
 207 }
 208