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   nvram_state->mem_state[NVRAM_REG_FLOPPY_TYPE]= 0x44;
  84
  85   //
  86   // For old boot sequence style, do floppy first
  87   //
  88   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_OLD]= 0x10;
  89
  90 #if 0
  91   // For new boot sequence style, do floppy, cd, then hd
  92   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_FIRST]= 0x31;
  93   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_SECOND]= 0x20;
  94 #endif
  95
  96   // For new boot sequence style, do cd, hd, floppy
  97   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_FIRST]= 0x23;
  98   nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_SECOND]= 0x10;
  99
 100
 101   // Set equipment byte to note 2 floppies, vga display, keyboard,math,floppy
 102   nvram_state->mem_state[NVRAM_REG_EQUIPMENT_BYTE]= 0x4f;
 103
 104   // Set conventional memory to 640K
 105   nvram_state->mem_state[NVRAM_REG_BASE_MEMORY_HIGH]= 0x02;
 106   nvram_state->mem_state[NVRAM_REG_BASE_MEMORY_LOW]= 0x80;
 107
 108   // Set extended memory to 15 MB
 109   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_HIGH]= 0x3C;
 110   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_LOW]= 0x00;
 111   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_2ND_HIGH]= 0x3C;
 112   nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_2ND_LOW]= 0x00;
 113
 114   // Set the extended memory beyond 16 MB to 128-16 MB
 115   nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_HIGH]= 0x7;
 116   nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_LOW]= 0x00;
 117
 118
 119   // This is the harddisk type.... Set accordingly...
 120   nvram_state->mem_state[NVRAM_IBM_HD_DATA] = 0x20;
 121
 122   return 0;
 123
 124 }
 125
 126
 127 int nvram_reset_device(struct vm_device * dev)
 128 {
 129   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 130
 131   SerialPrint("nvram: reset device\n");
 132
 133
 134
 135   data->dev_state = NVRAM_READY;
 136   data->thereg=0;
 137
 138
 139   return 0;
 140
 141 }
 142
 143
 144
 145
 146
 147 int nvram_start_device(struct vm_device *dev)
 148 {
 149   SerialPrint("nvram: start device\n");
 150   return 0;
 151 }
 152
 153
 154 int nvram_stop_device(struct vm_device *dev)
 155 {
 156   SerialPrint("nvram: stop device\n");
 157   return 0;
 158 }
 159
 160
 161
 162
 163 int nvram_write_reg_port(ushort_t port,
 164                         void * src,
 165                         uint_t length,
 166                         struct vm_device * dev)
 167 {
 168   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 169
 170   memcpy(&(data->thereg), src, 1);
 171   PrintDebug("Writing To NVRAM reg: 0x%x\n", data->thereg);
 172
 173
 174   return 1;
 175 }
 176
 177 int nvram_read_data_port(ushort_t port,
 178                        void   * dst,
 179                        uint_t length,
 180                        struct vm_device * dev)
 181 {
 182   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 183
 184
 185
 186   memcpy(dst, &(data->mem_state[data->thereg]), 1);
 187
 188   PrintDebug("nvram_read_data_port(0x%x)=0x%x\n", data->thereg, data->mem_state[data->thereg]);
 189
 190   return 1;
 191 }
 192
 193 int nvram_write_data_port(ushort_t port,
 194                         void * src,
 195                         uint_t length,
 196                         struct vm_device * dev)
 197 {
 198   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 199
 200   memcpy(&(data->mem_state[data->thereg]), src, 1);
 201
 202   PrintDebug("nvram_write_data_port(0x%x)=0x%x\n", data->thereg, data->mem_state[data->thereg]);
 203
 204   return 1;
 205 }
 206
 207
 208
 209 int nvram_init_device(struct vm_device * dev) {
 210
 211   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 212
 213   SerialPrint("nvram: init_device\n");
 214
 215   memset(data->mem_state, 0, NVRAM_REG_MAX);
 216
 217   // Would read state here
 218   set_nvram_defaults(dev);
 219
 220   nvram_reset_device(dev);
 221
 222   // hook ports
 223   dev_hook_io(dev, NVRAM_REG_PORT, NULL, &nvram_write_reg_port);
 224   dev_hook_io(dev, NVRAM_DATA_PORT, &nvram_read_data_port, &nvram_write_data_port);
 225
 226   return 0;
 227 }
 228
 229 int nvram_deinit_device(struct vm_device *dev)
 230 {
 231
 232
 233   dev_unhook_io(dev, NVRAM_REG_PORT);
 234   dev_unhook_io(dev, NVRAM_DATA_PORT);
 235
 236   nvram_reset_device(dev);
 237   return 0;
 238 }
 239
 240
 241
 242
 243
 244 static struct vm_device_ops dev_ops = {
 245   .init = nvram_init_device,
 246   .deinit = nvram_deinit_device,
 247   .reset = nvram_reset_device,
 248   .start = nvram_start_device,
 249   .stop = nvram_stop_device,
 250 };
 251
 252
 253
 254
 255 struct vm_device *create_nvram() {
 256   struct nvram_internal * nvram_state = os_hooks->malloc(sizeof(struct nvram_internal)+1000);
 257
 258   SerialPrint("internal at %x\n",nvram_state);
 259
 260   struct vm_device *device = create_device("NVRAM", &dev_ops, nvram_state);
 261
 262
 263   return device;
 264 }