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_REG_FLOPPY_TYPE             0x10
  40 #define NVRAM_REG_EQUIPMENT_BYTE          0x14
  41
  42 #define NVRAM_REG_BASE_MEMORY_HIGH        0x16
  43 #define NVRAM_REG_BASE_MEMORY_LOW         0x15
  44
  45 #define NVRAM_REG_EXT_MEMORY_HIGH         0x18
  46 #define NVRAM_REG_EXT_MEMORY_LOW          0x17
  47
  48 #define NVRAM_REG_EXT_MEMORY_2ND_HIGH     0x31
  49 #define NVRAM_REG_EXT_MEMORY_2ND_LOW      0x30
  50
  51 #define NVRAM_REG_BOOTSEQ_OLD             0x2d
  52
  53 #define NVRAM_REG_AMI_BIG_MEMORY_HIGH     0x35
  54 #define NVRAM_REG_AMI_BIG_MEMORY_LOW      0x34
  55
  56
  57 #define NVRAM_REG_CSUM_HIGH               0x2e
  58 #define NVRAM_REG_CSUM_LOW                0x2f
  59 #define NVRAM_REG_IBM_CENTURY_BYTE        0x32
  60 #define NVRAM_REG_IBM_PS2_CENTURY_BYTE    0x37
  61
  62 #define NVRAM_REG_BOOTSEQ_NEW_FIRST       0x3D
  63 #define NVRAM_REG_BOOTSEQ_NEW_SECOND      0x38
  64
  65
  66 struct nvram_internal {
  67   nvram_state_t dev_state;
  68   uchar_t       thereg;
  69   uchar_t       mem_state[NVRAM_REG_MAX];
  70 };
  71
  72
  73
  74 static int set_nvram_defaults(struct vm_device *dev)
  75 {
  76   struct nvram_internal * nvram_state = (struct nvram_internal*) dev->private_data;
  77
  78   //
  79   // 2 1.44 MB floppy drives
  80   //
  81   nvram_state->mem_state[NVRAM_REG_FLOPPY_TYPE]= 0x44;
  82
  83   //
  84   // For old boot sequence style, do floppy first
  85   //
  86   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_OLD]= 0x10;
  87
  88 #if 0
  89   // For new boot sequence style, do floppy, cd, then hd
  90   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_FIRST]= 0x31;
  91   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_SECOND]= 0x20;
  92 #endif
  93
  94   // For new boot sequence style, do cd, hd, floppy
  95   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_FIRST]= 0x23;
  96   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_SECOND]= 0x10;
  97
  98
  99   // Set equipment byte to note 2 floppies, vga display, keyboard,math,floppy
 100   nvram_state->mem_state[NVRAM_REG_EQUIPMENT_BYTE]= 0x4f;
 101
 102   // Set conventional memory to 640K
 103   nvram_state->mem_state[NVRAM_REG_BASE_MEMORY_HIGH]= 0x02;
 104   nvram_state->mem_state[NVRAM_REG_BASE_MEMORY_LOW]= 0x80;
 105
 106   // Set extended memory to 15 MB
 107   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_HIGH]= 0x3C;
 108   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_LOW]= 0x00;
 109   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_2ND_HIGH]= 0x3C;
 110   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_2ND_LOW]= 0x00;
 111
 112   // Set the extended memory beyond 16 MB to 128-16 MB
 113   nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_HIGH]= 0x7;
 114   nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_LOW]= 0x00;
 115
 116
 117
 118   return 0;
 119
 120 }
 121
 122
 123 int nvram_reset_device(struct vm_device * dev)
 124 {
 125   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 126
 127   SerialPrint("nvram: reset device\n");
 128
 129
 130
 131   data->dev_state = NVRAM_READY;
 132   data->thereg=0;
 133
 134
 135   return 0;
 136
 137 }
 138
 139
 140
 141
 142
 143 int nvram_start_device(struct vm_device *dev)
 144 {
 145   SerialPrint("nvram: start device\n");
 146   return 0;
 147 }
 148
 149
 150 int nvram_stop_device(struct vm_device *dev)
 151 {
 152   SerialPrint("nvram: stop device\n");
 153   return 0;
 154 }
 155
 156
 157
 158
 159 int nvram_write_reg_port(ushort_t port,
 160                         void * src,
 161                         uint_t length,
 162                         struct vm_device * dev)
 163 {
 164   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 165
 166   memcpy(&(data->thereg), src, 1);
 167
 168
 169   return 1;
 170 }
 171
 172 int nvram_read_data_port(ushort_t port,
 173                        void   * dst,
 174                        uint_t length,
 175                        struct vm_device * dev)
 176 {
 177   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 178
 179
 180
 181   memcpy(dst, &(data->mem_state[data->thereg]), 1);
 182
 183   SerialPrint("nvram_read_data_port(%x)=%x\n",data->thereg,data->mem_state[data->thereg]);
 184
 185   return 1;
 186 }
 187
 188 int nvram_write_data_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->mem_state[data->thereg]), src, 1);
 196
 197   SerialPrint("nvram_write_data_port(%x)=%x\n",data->thereg,data->mem_state[data->thereg]);
 198
 199   return 1;
 200 }
 201
 202
 203
 204 int nvram_init_device(struct vm_device * dev) {
 205
 206   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 207
 208   SerialPrint("nvram: init_device\n");
 209
 210   memset(data->mem_state, 0, NVRAM_REG_MAX);
 211
 212   // Would read state here
 213   set_nvram_defaults(dev);
 214
 215   nvram_reset_device(dev);
 216
 217   // hook ports
 218   dev_hook_io(dev, NVRAM_REG_PORT, NULL, &nvram_write_reg_port);
 219   dev_hook_io(dev, NVRAM_DATA_PORT, &nvram_read_data_port, &nvram_write_data_port);
 220
 221   return 0;
 222 }
 223
 224 int nvram_deinit_device(struct vm_device *dev)
 225 {
 226
 227
 228   dev_unhook_io(dev, NVRAM_REG_PORT);
 229   dev_unhook_io(dev, NVRAM_DATA_PORT);
 230
 231   nvram_reset_device(dev);
 232   return 0;
 233 }
 234
 235
 236
 237
 238
 239 static struct vm_device_ops dev_ops = {
 240   .init = nvram_init_device,
 241   .deinit = nvram_deinit_device,
 242   .reset = nvram_reset_device,
 243   .start = nvram_start_device,
 244   .stop = nvram_stop_device,
 245 };
 246
 247
 248
 249
 250 struct vm_device *create_nvram() {
 251   struct nvram_internal * nvram_state = os_hooks->malloc(sizeof(struct nvram_internal)+1000);
 252
 253   SerialPrint("internal at %x\n",nvram_state);
 254
 255   struct vm_device *device = create_device("NVRAM", &dev_ops, nvram_state);
 256
 257
 258   return device;
 259 }