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   nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_HIGH]= 0x00;
 119   nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_LOW]= 0x00;
 120
 121
 122   // This is the harddisk type.... Set accordingly...
 123   nvram_state->mem_state[NVRAM_IBM_HD_DATA] = 0x20;
 124
 125   return 0;
 126
 127 }
 128
 129
 130 int nvram_reset_device(struct vm_device * dev)
 131 {
 132   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 133
 134   SerialPrint("nvram: reset device\n");
 135
 136
 137
 138   data->dev_state = NVRAM_READY;
 139   data->thereg=0;
 140
 141
 142   return 0;
 143
 144 }
 145
 146
 147
 148
 149
 150 int nvram_start_device(struct vm_device *dev)
 151 {
 152   SerialPrint("nvram: start device\n");
 153   return 0;
 154 }
 155
 156
 157 int nvram_stop_device(struct vm_device *dev)
 158 {
 159   SerialPrint("nvram: stop device\n");
 160   return 0;
 161 }
 162
 163
 164
 165
 166 int nvram_write_reg_port(ushort_t port,
 167                         void * src,
 168                         uint_t length,
 169                         struct vm_device * dev)
 170 {
 171   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 172
 173   memcpy(&(data->thereg), src, 1);
 174   PrintDebug("Writing To NVRAM reg: 0x%x\n", data->thereg);
 175
 176
 177   return 1;
 178 }
 179
 180 int nvram_read_data_port(ushort_t port,
 181                        void   * dst,
 182                        uint_t length,
 183                        struct vm_device * dev)
 184 {
 185   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 186
 187
 188
 189   memcpy(dst, &(data->mem_state[data->thereg]), 1);
 190
 191   PrintDebug("nvram_read_data_port(0x%x)=0x%x\n", data->thereg, data->mem_state[data->thereg]);
 192
 193   return 1;
 194 }
 195
 196 int nvram_write_data_port(ushort_t port,
 197                         void * src,
 198                         uint_t length,
 199                         struct vm_device * dev)
 200 {
 201   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 202
 203   memcpy(&(data->mem_state[data->thereg]), src, 1);
 204
 205   PrintDebug("nvram_write_data_port(0x%x)=0x%x\n", data->thereg, data->mem_state[data->thereg]);
 206
 207   return 1;
 208 }
 209
 210
 211
 212 int nvram_init_device(struct vm_device * dev) {
 213
 214   struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
 215
 216   SerialPrint("nvram: init_device\n");
 217
 218   memset(data->mem_state, 0, NVRAM_REG_MAX);
 219
 220   // Would read state here
 221   set_nvram_defaults(dev);
 222
 223   nvram_reset_device(dev);
 224
 225   // hook ports
 226   dev_hook_io(dev, NVRAM_REG_PORT, NULL, &nvram_write_reg_port);
 227   dev_hook_io(dev, NVRAM_DATA_PORT, &nvram_read_data_port, &nvram_write_data_port);
 228
 229   return 0;
 230 }
 231
 232 int nvram_deinit_device(struct vm_device *dev)
 233 {
 234
 235
 236   dev_unhook_io(dev, NVRAM_REG_PORT);
 237   dev_unhook_io(dev, NVRAM_DATA_PORT);
 238
 239   nvram_reset_device(dev);
 240   return 0;
 241 }
 242
 243
 244
 245
 246
 247 static struct vm_device_ops dev_ops = {
 248   .init = nvram_init_device,
 249   .deinit = nvram_deinit_device,
 250   .reset = nvram_reset_device,
 251   .start = nvram_start_device,
 252   .stop = nvram_stop_device,
 253 };
 254
 255
 256
 257
 258 struct vm_device *create_nvram() {
 259   struct nvram_internal * nvram_state = os_hooks->malloc(sizeof(struct nvram_internal)+1000);
 260
 261   SerialPrint("internal at %x\n",nvram_state);
 262
 263   struct vm_device *device = create_device("NVRAM", &dev_ops, nvram_state);
 264
 265
 266   return device;
 267 }