Example #1
0
File: hw_eeprom.c Project: 5kg/gdb
static void
start_programming_byte(device *me,
		       hw_eeprom_device *eeprom,
		       unsigned_word address,
		       unsigned8 new_byte)
{
  unsigned8 old_byte = eeprom->memory[address];
  DTRACE(eeprom, ("start-programing-byte - address 0x%lx, new 0x%lx, old 0x%lx\n",
		  (unsigned long)address,
		  (unsigned long)new_byte,
		  (unsigned long)old_byte));
  eeprom->byte_program_address = address;
  /* : old new : ~old : new&~old
     :  0   0  :   1  :    0
     :  0   1  :   1  :    1     -- can not set a bit
     :  1   0  :   0  :    0
     :  1   1  :   0  :    0 */
  if (~old_byte & new_byte)
    invalid_write(me, eeprom->state, address, new_byte, "setting cleared bit");
  /* : old new : old&new
     :  0   0  :    0
     :  0   1  :    0
     :  1   0  :    0
     :  1   1  :    1 */
  eeprom->byte_program_byte = new_byte & old_byte;
  eeprom->memory[address] = ~new_byte & ~0x24; /* LE-bits 5:3 zero */
  eeprom->program_start_time = device_event_queue_time(me);
  eeprom->program_finish_time = (eeprom->program_start_time
				 + eeprom->byte_write_delay);
}
Example #2
0
static void sh7750_mmct_write(void *opaque, target_phys_addr_t addr,
                              uint64_t mem_value, unsigned size)
{
    SH7750State *s = opaque;

    if (size != 4) {
        invalid_write(opaque, addr, mem_value);
    }

    switch (MM_REGION_TYPE(addr)) {
    case MM_ICACHE_ADDR:
    case MM_ICACHE_DATA:
        /* do nothing */
	break;
    case MM_ITLB_ADDR:
        cpu_sh4_write_mmaped_itlb_addr(s->cpu, addr, mem_value);
        break;
    case MM_ITLB_DATA:
        cpu_sh4_write_mmaped_itlb_data(s->cpu, addr, mem_value);
        abort();
	break;
    case MM_OCACHE_ADDR:
    case MM_OCACHE_DATA:
        /* do nothing */
	break;
    case MM_UTLB_ADDR:
        cpu_sh4_write_mmaped_utlb_addr(s->cpu, addr, mem_value);
	break;
    case MM_UTLB_DATA:
        cpu_sh4_write_mmaped_utlb_data(s->cpu, addr, mem_value);
	break;
    default:
        abort();
	break;
    }
}
Example #3
0
File: hw_eeprom.c Project: 5kg/gdb
static void
write_byte(device *me,
	   hw_eeprom_device *eeprom,
	   unsigned_word address,
	   unsigned8 data)
{
  /* may need multiple transitions to process a write */
  while (1) {
    switch (eeprom->state) {

    case read_reset:
      if (address == 0x5555 && data == 0xaa)
	eeprom->state = write_nr_2;
      else if (data == 0xf0)
	eeprom->state = read_reset;
      else {
	invalid_write(me, eeprom->state, address, data, "unexpected");
	eeprom->state = read_reset;
      }
      return;

    case write_nr_2:
      if (address == 0x2aaa && data == 0x55)
	eeprom->state = write_nr_3;
      else {
	invalid_write(me, eeprom->state, address, data, "unexpected");
	eeprom->state = read_reset;
      }
      return;

    case write_nr_3:
      if (address == 0x5555 && data == 0xf0)
	eeprom->state = read_reset;
      else if (address == 0x5555 && data == 0x90)
	eeprom->state = autoselect;
      else if (address == 0x5555 && data == 0xa0) {
	eeprom->state = byte_program;
      }
      else if (address == 0x5555 && data == 0x80)
	eeprom->state = write_nr_4;
      else {
	invalid_write(me, eeprom->state, address, data, "unexpected");
	eeprom->state = read_reset;
      }
      return;

    case write_nr_4:
      if (address == 0x5555 && data == 0xaa)
	eeprom->state = write_nr_5;
      else {
	invalid_write(me, eeprom->state, address, data, "unexpected");
	eeprom->state = read_reset;
      }
      return;

    case write_nr_5:
      if (address == 0x2aaa && data == 0x55)
	eeprom->state = write_nr_6;
      else {
	invalid_write(me, eeprom->state, address, data, "unexpected");
	eeprom->state = read_reset;
      }
      return;

    case write_nr_6:
      if (address == 0x5555 && data == 0x10) {
	start_erasing_chip(me, eeprom);
	eeprom->state = chip_erase;
      }
      else {
	start_erasing_sector(me, eeprom, address);
	eeprom->sector_state = read_reset;
	eeprom->state = sector_erase;
      }
      return;

    case autoselect:
      if (data == 0xf0)
	eeprom->state = read_reset;
      else if (address == 0x5555 && data == 0xaa)
	eeprom->state = write_nr_2;
      else {
	invalid_write(me, eeprom->state, address, data, "unsupported address");
	eeprom->state = read_reset;
      }
      return;

    case byte_program:
      start_programming_byte(me, eeprom, address, data);
      eeprom->state = byte_programming;
      return;

    case byte_programming:
      if (device_event_queue_time(me) > eeprom->program_finish_time) {
	finish_programming_byte(me, eeprom);
	eeprom->state = read_reset;
	continue;
      }
      /* ignore it */
      return;

    case chip_erase:
      if (device_event_queue_time(me) > eeprom->program_finish_time) {
	finish_erasing_chip(me, eeprom);
	eeprom->state = read_reset;
	continue;
      }
      /* ignore it */
      return;

    case sector_erase:
      if (device_event_queue_time(me) > eeprom->program_finish_time) {
	finish_erasing_sector(me, eeprom);
	eeprom->state = eeprom->sector_state;
	continue;
      }
      else if (device_event_queue_time(me) > eeprom->sector_start_time
	       && data == 0xb0) {
	eeprom->sector_state = read_reset;
	eeprom->state = sector_erase_suspend;
      }
      else {
	if (eeprom->sector_state == read_reset
	    && address == 0x5555 && data == 0xaa)
	  eeprom->sector_state = write_nr_2;
	else if (eeprom->sector_state == write_nr_2
		 && address == 0x2aaa && data == 0x55)
	  eeprom->sector_state = write_nr_3;
	else if (eeprom->sector_state == write_nr_3
		 && address == 0x5555 && data == 0x80)
	  eeprom->sector_state = write_nr_4;
	else if (eeprom->sector_state == write_nr_4
		 && address == 0x5555 && data == 0xaa)
	  eeprom->sector_state = write_nr_5;
	else if (eeprom->sector_state == write_nr_5
		 && address == 0x2aaa && data == 0x55)
	  eeprom->sector_state = write_nr_6;
	else if (eeprom->sector_state == write_nr_6
		 && address != 0x5555 && data == 0x30) {
	  if (device_event_queue_time(me) > eeprom->sector_start_time) {
	    DTRACE(eeprom, ("sector erase command after window closed\n"));
	    eeprom->sector_state = read_reset;
	  }
	  else {
	    start_erasing_sector(me, eeprom, address);
	    eeprom->sector_state = read_reset;
	  }
	}
	else {
	  invalid_write(me, eeprom->state, address, data, state2a(eeprom->sector_state));
	  eeprom->state = read_reset;
	}
      }
      return;

    case sector_erase_suspend:
      if (data == 0x30)
	eeprom->state = sector_erase;
      else {
	invalid_write(me, eeprom->state, address, data, "not resume command");
	eeprom->state = read_reset;
      }
      return;

    }
  }
}