palacios/src/devices/nvram.c

   1 #include <devices/nvram.h>
   2 #include <palacios/vmm.h>
   3 #include <palacios/vmm_types.h>
   4
   5 extern struct vmm_os_hooks *os_hooks;
   6
   7 extern void SerialPrint(const char *format, ...);
   8
   9 #define NVRAM_REG_PORT  0x70
  10 #define NVRAM_DATA_PORT 0x71
  11
  12
  13
  14 typedef enum {NVRAM_READY, NVRAM_REG_POSTED} nvram_state_t;
  15
  16
  17 #define NVRAM_REG_MAX   256
  18
  19
  20 // These are borrowed from Bochs, which borrowed from
  21 // Ralf Brown's interupt list, and extended
  22 #define NVRAM_REG_SEC                     0x00
  23 #define NVRAM_REG_SEC_ALARM               0x01
  24 #define NVRAM_REG_MIN                     0x02
  25 #define NVRAM_REG_MIN_ALARM               0x03
  26 #define NVRAM_REG_HOUR                    0x04
  27 #define NVRAM_REG_HOUR_ALARM              0x05
  28 #define NVRAM_REG_WEEK_DAY                0x06
  29 #define NVRAM_REG_MONTH_DAY               0x07
  30 #define NVRAM_REG_MONTH                   0x08
  31 #define NVRAM_REG_YEAR                    0x09
  32 #define NVRAM_REG_STAT_A                  0x0a
  33 #define NVRAM_REG_STAT_B                  0x0b
  34 #define NVRAM_REG_STAT_C                  0x0c
  35 #define NVRAM_REG_STAT_D                  0x0d
  36 #define NVRAM_REG_DIAGNOSTIC_STATUS       0x0e
  37 #define NVRAM_REG_SHUTDOWN_STATUS         0x0f
  38
  39 #define NVRAM_IBM_HD_DATA                 0x12
  40
  41 #define NVRAM_REG_FLOPPY_TYPE             0x10
  42 #define NVRAM_REG_EQUIPMENT_BYTE          0x14
  43
  44 #define NVRAM_REG_BASE_MEMORY_HIGH        0x16
  45 #define NVRAM_REG_BASE_MEMORY_LOW         0x15
  46
  47 #define NVRAM_REG_EXT_MEMORY_HIGH         0x18
  48 #define NVRAM_REG_EXT_MEMORY_LOW          0x17
  49
  50 #define NVRAM_REG_EXT_MEMORY_2ND_HIGH     0x31
  51 #define NVRAM_REG_EXT_MEMORY_2ND_LOW      0x30
  52
  53 #define NVRAM_REG_BOOTSEQ_OLD             0x2d
  54
  55 #define NVRAM_REG_AMI_BIG_MEMORY_HIGH     0x35
  56 #define NVRAM_REG_AMI_BIG_MEMORY_LOW      0x34
  57
  58
  59 #define NVRAM_REG_CSUM_HIGH               0x2e
  60 #define NVRAM_REG_CSUM_LOW                0x2f
  61 #define NVRAM_REG_IBM_CENTURY_BYTE        0x32
  62 #define NVRAM_REG_IBM_PS2_CENTURY_BYTE    0x37
  63
  64 #define NVRAM_REG_BOOTSEQ_NEW_FIRST       0x3D
  65 #define NVRAM_REG_BOOTSEQ_NEW_SECOND      0x38
  66
  67
  68 struct nvram_internal {
  69   nvram_state_t dev_state;
  70   uchar_t       thereg;
  71   uchar_t       mem_state[NVRAM_REG_MAX];
  72 };
  73
  74
  75
  76 static int set_nvram_defaults(struct vm_device *dev)
  77 {
  78   struct nvram_internal * nvram_state = (struct nvram_internal*) dev->private_data;
  79
  80   //
  81   // 2 1.44 MB floppy drives
  82   //
  83 #if 1
  84   nvram_state->mem_state[NVRAM_REG_FLOPPY_TYPE]= 0x44;
  85 #else
  86   nvram_state->mem_state[NVRAM_REG_FLOPPY_TYPE] = 0x00;
  87 #endif
  88
  89   //
  90   // For old boot sequence style, do floppy first
  91   //
  92   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_OLD]= 0x10;
  93
  94 #if 0
  95   // For new boot sequence style, do floppy, cd, then hd
  96   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_FIRST]= 0x31;
  97   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_SECOND]= 0x20;
  98 #endif
  99
 100   // For new boot sequence style, do cd, hd, floppy
 101   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_FIRST]= 0x23;
 102   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_SECOND]= 0x10;
 103
 104
 105   // Set equipment byte to note 2 floppies, vga display, keyboard,math,floppy
 106   nvram_state->mem_state[NVRAM_REG_EQUIPMENT_BYTE]= 0x4f;
 107   //nvram_state->mem_state[NVRAM_REG_EQUIPMENT_BYTE] = 0xf;
 108
 109   // Set conventional memory to 640K
 110   nvram_state->mem_state[NVRAM_REG_BASE_MEMORY_HIGH]= 0x02;
 111   nvram_state->mem_state[NVRAM_REG_BASE_MEMORY_LOW]= 0x80;
 112
 113   // Set extended memory to 15 MB
 114   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_HIGH]= 0x3C;
 115   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_LOW]= 0x00;
 116   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_2ND_HIGH]= 0x3C;
 117   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_2ND_LOW]= 0x00;
 118
 119   // Set the extended memory beyond 16 MB to 128-16 MB
 120   // nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_HIGH]= 0x7;
 121   //nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_LOW]= 0x00;
 122
 123   nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_HIGH]= 0x00;
 124   nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_LOW]= 0x00;
 125
 126
 127   // This is the harddisk type.... Set accordingly...
 128   nvram_state->mem_state[NVRAM_IBM_HD_DATA] = 0x20;
 129
 130   // Set the shutdown status gently
 131   // soft reset
 132   nvram_state->mem_state[NVRAM_REG_SHUTDOWN_STATUS] = 0x0;
 133
 134
 135   // RTC status A
 136   // time update in progress, default timebase (32KHz, default interrupt rate 1KHz)
 137   // 10100110
 138   nvram_state->mem_state[NVRAM_REG_STAT_A] = 0xa6;
 139
 140   // RTC status B
 141   // time updates, default timebase (32KHz, default interrupt rate 1KHz)
 142   // 10100110
 143   //nvram_state->mem_state[NVRAM_REG_STAT_B] = 0xa6;
 144
 145
 146
 147   return 0;
 148
 149 }
 150
 151
 152 int nvram_reset_device(struct vm_device * dev)
 153 {
 154   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 155
 156   SerialPrint("nvram: reset device\n");
 157
 158
 159
 160   data->dev_state = NVRAM_READY;
 161   data->thereg=0;
 162
 163
 164   return 0;
 165
 166 }
 167
 168
 169
 170
 171
 172 int nvram_start_device(struct vm_device *dev)
 173 {
 174   SerialPrint("nvram: start device\n");
 175   return 0;
 176 }
 177
 178
 179 int nvram_stop_device(struct vm_device *dev)
 180 {
 181   SerialPrint("nvram: stop device\n");
 182   return 0;
 183 }
 184
 185
 186
 187
 188 int nvram_write_reg_port(ushort_t port,
 189                         void * src,
 190                         uint_t length,
 191                         struct vm_device * dev)
 192 {
 193   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 194
 195   memcpy(&(data->thereg), src, 1);
 196   PrintDebug("Writing To NVRAM reg: 0x%x\n", data->thereg);
 197
 198
 199   return 1;
 200 }
 201
 202 int nvram_read_data_port(ushort_t port,
 203                        void   * dst,
 204                        uint_t length,
 205                        struct vm_device * dev)
 206 {
 207   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 208
 209
 210
 211   memcpy(dst, &(data->mem_state[data->thereg]), 1);
 212
 213   PrintDebug("nvram_read_data_port(0x%x)=0x%x\n", data->thereg, data->mem_state[data->thereg]);
 214
 215   // hack
 216   if (data->thereg==NVRAM_REG_STAT_A) {
 217     data->mem_state[data->thereg] ^= 0x80;  // toggle Update in progess
 218   }
 219
 220
 221   return 1;
 222 }
 223
 224 int nvram_write_data_port(ushort_t port,
 225                         void * src,
 226                         uint_t length,
 227                         struct vm_device * dev)
 228 {
 229   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 230
 231   memcpy(&(data->mem_state[data->thereg]), src, 1);
 232
 233   PrintDebug("nvram_write_data_port(0x%x)=0x%x\n", data->thereg, data->mem_state[data->thereg]);
 234
 235   return 1;
 236 }
 237
 238
 239
 240 int nvram_init_device(struct vm_device * dev) {
 241
 242   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 243
 244   SerialPrint("nvram: init_device\n");
 245
 246   memset(data->mem_state, 0, NVRAM_REG_MAX);
 247
 248   // Would read state here
 249   set_nvram_defaults(dev);
 250
 251   nvram_reset_device(dev);
 252
 253   // hook ports
 254   dev_hook_io(dev, NVRAM_REG_PORT, NULL, &nvram_write_reg_port);
 255   dev_hook_io(dev, NVRAM_DATA_PORT, &nvram_read_data_port, &nvram_write_data_port);
 256
 257   return 0;
 258 }
 259
 260 int nvram_deinit_device(struct vm_device *dev)
 261 {
 262
 263
 264   dev_unhook_io(dev, NVRAM_REG_PORT);
 265   dev_unhook_io(dev, NVRAM_DATA_PORT);
 266
 267   nvram_reset_device(dev);
 268   return 0;
 269 }
 270
 271
 272
 273
 274
 275 static struct vm_device_ops dev_ops = {
 276   .init = nvram_init_device,
 277   .deinit = nvram_deinit_device,
 278   .reset = nvram_reset_device,
 279   .start = nvram_start_device,
 280   .stop = nvram_stop_device,
 281 };
 282
 283
 284
 285
 286 struct vm_device *create_nvram() {
 287   struct nvram_internal * nvram_state = os_hooks->malloc(sizeof(struct nvram_internal)+1000);
 288
 289   SerialPrint("internal at %x\n",nvram_state);
 290
 291   struct vm_device *device = create_device("NVRAM", &dev_ops, nvram_state);
 292
 293
 294   return device;
 295 }