arch/m68k/amiga/config.c

/*
 *  linux/arch/m68k/amiga/config.c
 *
 *  Copyright (C) 1993 Hamish Macdonald
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

/*
 * Miscellaneous Amiga stuff
 */

#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/rtc.h>
#include <linux/init.h>
#include <linux/vt_kern.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#ifdef CONFIG_ZORRO
#include <linux/zorro.h>
#endif

#include <asm/bootinfo.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
#include <asm/irq.h>
#include <asm/rtc.h>
#include <asm/machdep.h>
#include <asm/io.h>

unsigned long amiga_model;
unsigned long amiga_eclock;
unsigned long amiga_masterclock;
unsigned long amiga_colorclock;
unsigned long amiga_chipset;
unsigned char amiga_vblank;
unsigned char amiga_psfreq;
struct amiga_hw_present amiga_hw_present;

static char s_a500[] __initdata = "A500";
static char s_a500p[] __initdata = "A500+";
static char s_a600[] __initdata = "A600";
static char s_a1000[] __initdata = "A1000";
static char s_a1200[] __initdata = "A1200";
static char s_a2000[] __initdata = "A2000";
static char s_a2500[] __initdata = "A2500";
static char s_a3000[] __initdata = "A3000";
static char s_a3000t[] __initdata = "A3000T";
static char s_a3000p[] __initdata = "A3000+";
static char s_a4000[] __initdata = "A4000";
static char s_a4000t[] __initdata = "A4000T";
static char s_cdtv[] __initdata = "CDTV";
static char s_cd32[] __initdata = "CD32";
static char s_draco[] __initdata = "Draco";
static char *amiga_models[] __initdata = {
    [AMI_500-AMI_500]		= s_a500,
    [AMI_500PLUS-AMI_500]	= s_a500p,
    [AMI_600-AMI_500]		= s_a600,
    [AMI_1000-AMI_500]		= s_a1000,
    [AMI_1200-AMI_500]		= s_a1200,
    [AMI_2000-AMI_500]		= s_a2000,
    [AMI_2500-AMI_500]		= s_a2500,
    [AMI_3000-AMI_500]		= s_a3000,
    [AMI_3000T-AMI_500]		= s_a3000t,
    [AMI_3000PLUS-AMI_500]	= s_a3000p,
    [AMI_4000-AMI_500]		= s_a4000,
    [AMI_4000T-AMI_500]		= s_a4000t,
    [AMI_CDTV-AMI_500]		= s_cdtv,
    [AMI_CD32-AMI_500]		= s_cd32,
    [AMI_DRACO-AMI_500]		= s_draco,
};

static char amiga_model_name[13] = "Amiga ";

extern char m68k_debug_device[];

static void amiga_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
/* amiga specific irq functions */
extern void amiga_init_IRQ (void);
static void amiga_get_model(char *model);
static int amiga_get_hardware_list(char *buffer);
/* amiga specific timer functions */
static unsigned long amiga_gettimeoffset (void);
static int a3000_hwclk (int, struct rtc_time *);
static int a2000_hwclk (int, struct rtc_time *);
static int amiga_set_clock_mmss (unsigned long);
static unsigned int amiga_get_ss (void);
extern void amiga_mksound( unsigned int count, unsigned int ticks );
static void amiga_reset (void);
extern void amiga_init_sound(void);
static void amiga_savekmsg_init(void);
static void amiga_mem_console_write(struct console *co, const char *b,
				    unsigned int count);
void amiga_serial_console_write(struct console *co, const char *s,
				unsigned int count);
static void amiga_debug_init(void);
#ifdef CONFIG_HEARTBEAT
static void amiga_heartbeat(int on);
#endif

static struct console amiga_console_driver = {
	.name =		"debug",
	.flags =	CON_PRINTBUFFER,
	.index =	-1,
};


    /*
     *  Motherboard Resources present in all Amiga models
     */

static struct {
    struct resource _ciab, _ciaa, _custom, _kickstart;
} mb_resources = {
    ._ciab = {
	.name = "CIA B", .start = 0x00bfd000, .end = 0x00bfdfff
    },
    ._ciaa = {
	.name = "CIA A", .start = 0x00bfe000, .end = 0x00bfefff
    },
    ._custom = {
	.name = "Custom I/O", .start = 0x00dff000, .end = 0x00dfffff
    },
    ._kickstart = {
	.name = "Kickstart ROM", .start = 0x00f80000, .end = 0x00ffffff
    }
};

static struct resource rtc_resource = {
    .start = 0x00dc0000, .end = 0x00dcffff
};

static struct resource ram_resource[NUM_MEMINFO];


    /*
     *  Parse an Amiga-specific record in the bootinfo
     */

int amiga_parse_bootinfo(const struct bi_record *record)
{
    int unknown = 0;
    const unsigned long *data = record->data;

    switch (record->tag) {
	case BI_AMIGA_MODEL:
	    amiga_model = *data;
	    break;

	case BI_AMIGA_ECLOCK:
	    amiga_eclock = *data;
	    break;

	case BI_AMIGA_CHIPSET:
	    amiga_chipset = *data;
	    break;

	case BI_AMIGA_CHIP_SIZE:
	    amiga_chip_size = *(const int *)data;
	    break;

	case BI_AMIGA_VBLANK:
	    amiga_vblank = *(const unsigned char *)data;
	    break;

	case BI_AMIGA_PSFREQ:
	    amiga_psfreq = *(const unsigned char *)data;
	    break;

	case BI_AMIGA_AUTOCON:
#ifdef CONFIG_ZORRO
	    if (zorro_num_autocon < ZORRO_NUM_AUTO) {
		const struct ConfigDev *cd = (struct ConfigDev *)data;
		struct zorro_dev *dev = &zorro_autocon[zorro_num_autocon++];
		dev->rom = cd->cd_Rom;
		dev->slotaddr = cd->cd_SlotAddr;
		dev->slotsize = cd->cd_SlotSize;
		dev->resource.start = (unsigned long)cd->cd_BoardAddr;
		dev->resource.end = dev->resource.start+cd->cd_BoardSize-1;
	    } else
		printk("amiga_parse_bootinfo: too many AutoConfig devices\n");
#endif /* CONFIG_ZORRO */
	    break;

	case BI_AMIGA_SERPER:
	    /* serial port period: ignored here */
	    break;

	default:
	    unknown = 1;
    }
    return(unknown);
}

    /*
     *  Identify builtin hardware
     */

static void __init amiga_identify(void)
{
  /* Fill in some default values, if necessary */
  if (amiga_eclock == 0)
    amiga_eclock = 709379;

  memset(&amiga_hw_present, 0, sizeof(amiga_hw_present));

  printk("Amiga hardware found: ");
  if (amiga_model >= AMI_500 && amiga_model <= AMI_DRACO) {
    printk("[%s] ", amiga_models[amiga_model-AMI_500]);
    strcat(amiga_model_name, amiga_models[amiga_model-AMI_500]);
  }

  switch(amiga_model) {
  case AMI_UNKNOWN:
    goto Generic;

  case AMI_600:
  case AMI_1200:
    AMIGAHW_SET(A1200_IDE);
    AMIGAHW_SET(PCMCIA);
  case AMI_500:
  case AMI_500PLUS:
  case AMI_1000:
  case AMI_2000:
  case AMI_2500:
    AMIGAHW_SET(A2000_CLK);	/* Is this correct for all models? */
    goto Generic;

  case AMI_3000:
  case AMI_3000T:
    AMIGAHW_SET(AMBER_FF);
    AMIGAHW_SET(MAGIC_REKICK);
    /* fall through */
  case AMI_3000PLUS:
    AMIGAHW_SET(A3000_SCSI);
    AMIGAHW_SET(A3000_CLK);
    AMIGAHW_SET(ZORRO3);
    goto Generic;

  case AMI_4000T:
    AMIGAHW_SET(A4000_SCSI);
    /* fall through */
  case AMI_4000:
    AMIGAHW_SET(A4000_IDE);
    AMIGAHW_SET(A3000_CLK);
    AMIGAHW_SET(ZORRO3);
    goto Generic;

  case AMI_CDTV:
  case AMI_CD32:
    AMIGAHW_SET(CD_ROM);
    AMIGAHW_SET(A2000_CLK);             /* Is this correct? */
    goto Generic;

  Generic:
    AMIGAHW_SET(AMI_VIDEO);
    AMIGAHW_SET(AMI_BLITTER);
    AMIGAHW_SET(AMI_AUDIO);
    AMIGAHW_SET(AMI_FLOPPY);
    AMIGAHW_SET(AMI_KEYBOARD);
    AMIGAHW_SET(AMI_MOUSE);
    AMIGAHW_SET(AMI_SERIAL);
    AMIGAHW_SET(AMI_PARALLEL);
    AMIGAHW_SET(CHIP_RAM);
    AMIGAHW_SET(PAULA);

    switch(amiga_chipset) {
    case CS_OCS:
    case CS_ECS:
    case CS_AGA:
      switch (amiga_custom.deniseid & 0xf) {
      case 0x0c:
	AMIGAHW_SET(DENISE_HR);
	break;
      case 0x08:
	AMIGAHW_SET(LISA);
	break;
      }
      break;
    default:
      AMIGAHW_SET(DENISE);
      break;
    }
    switch ((amiga_custom.vposr>>8) & 0x7f) {
    case 0x00:
      AMIGAHW_SET(AGNUS_PAL);
      break;
    case 0x10:
      AMIGAHW_SET(AGNUS_NTSC);
      break;
    case 0x20:
    case 0x21:
      AMIGAHW_SET(AGNUS_HR_PAL);
      break;
    case 0x30:
    case 0x31:
      AMIGAHW_SET(AGNUS_HR_NTSC);
      break;
    case 0x22:
    case 0x23:
      AMIGAHW_SET(ALICE_PAL);
      break;
    case 0x32:
    case 0x33:
      AMIGAHW_SET(ALICE_NTSC);
      break;
    }
    AMIGAHW_SET(ZORRO);
    break;

  case AMI_DRACO:
    panic("No support for Draco yet");

  default:
    panic("Unknown Amiga Model");
  }

#define AMIGAHW_ANNOUNCE(name, str)			\
  if (AMIGAHW_PRESENT(name))				\
    printk(str)

  AMIGAHW_ANNOUNCE(AMI_VIDEO, "VIDEO ");
  AMIGAHW_ANNOUNCE(AMI_BLITTER, "BLITTER ");
  AMIGAHW_ANNOUNCE(AMBER_FF, "AMBER_FF ");
  AMIGAHW_ANNOUNCE(AMI_AUDIO, "AUDIO ");
  AMIGAHW_ANNOUNCE(AMI_FLOPPY, "FLOPPY ");
  AMIGAHW_ANNOUNCE(A3000_SCSI, "A3000_SCSI ");
  AMIGAHW_ANNOUNCE(A4000_SCSI, "A4000_SCSI ");
  AMIGAHW_ANNOUNCE(A1200_IDE, "A1200_IDE ");
  AMIGAHW_ANNOUNCE(A4000_IDE, "A4000_IDE ");
  AMIGAHW_ANNOUNCE(CD_ROM, "CD_ROM ");
  AMIGAHW_ANNOUNCE(AMI_KEYBOARD, "KEYBOARD ");
  AMIGAHW_ANNOUNCE(AMI_MOUSE, "MOUSE ");
  AMIGAHW_ANNOUNCE(AMI_SERIAL, "SERIAL ");
  AMIGAHW_ANNOUNCE(AMI_PARALLEL, "PARALLEL ");
  AMIGAHW_ANNOUNCE(A2000_CLK, "A2000_CLK ");
  AMIGAHW_ANNOUNCE(A3000_CLK, "A3000_CLK ");
  AMIGAHW_ANNOUNCE(CHIP_RAM, "CHIP_RAM ");
  AMIGAHW_ANNOUNCE(PAULA, "PAULA ");
  AMIGAHW_ANNOUNCE(DENISE, "DENISE ");
  AMIGAHW_ANNOUNCE(DENISE_HR, "DENISE_HR ");
  AMIGAHW_ANNOUNCE(LISA, "LISA ");
  AMIGAHW_ANNOUNCE(AGNUS_PAL, "AGNUS_PAL ");
  AMIGAHW_ANNOUNCE(AGNUS_NTSC, "AGNUS_NTSC ");
  AMIGAHW_ANNOUNCE(AGNUS_HR_PAL, "AGNUS_HR_PAL ");
  AMIGAHW_ANNOUNCE(AGNUS_HR_NTSC, "AGNUS_HR_NTSC ");
  AMIGAHW_ANNOUNCE(ALICE_PAL, "ALICE_PAL ");
  AMIGAHW_ANNOUNCE(ALICE_NTSC, "ALICE_NTSC ");
  AMIGAHW_ANNOUNCE(MAGIC_REKICK, "MAGIC_REKICK ");
  AMIGAHW_ANNOUNCE(PCMCIA, "PCMCIA ");
  if (AMIGAHW_PRESENT(ZORRO))
    printk("ZORRO%s ", AMIGAHW_PRESENT(ZORRO3) ? "3" : "");
  printk("\n");

#undef AMIGAHW_ANNOUNCE
}

    /*
     *  Setup the Amiga configuration info
     */

void __init config_amiga(void)
{
  int i;

  amiga_debug_init();
  amiga_identify();

  /* Yuk, we don't have PCI memory */
  iomem_resource.name = "Memory";
  for (i = 0; i < 4; i++)
    request_resource(&iomem_resource, &((struct resource *)&mb_resources)[i]);

  mach_sched_init      = amiga_sched_init;
  mach_init_IRQ        = amiga_init_IRQ;
  mach_get_model       = amiga_get_model;
  mach_get_hardware_list = amiga_get_hardware_list;
  mach_gettimeoffset   = amiga_gettimeoffset;
  if (AMIGAHW_PRESENT(A3000_CLK)){
    mach_hwclk         = a3000_hwclk;
    rtc_resource.name = "A3000 RTC";
    request_resource(&iomem_resource, &rtc_resource);
  }
  else{ /* if (AMIGAHW_PRESENT(A2000_CLK)) */
    mach_hwclk         = a2000_hwclk;
    rtc_resource.name = "A2000 RTC";
    request_resource(&iomem_resource, &rtc_resource);
  }

  mach_max_dma_address = 0xffffffff; /*
				      * default MAX_DMA=0xffffffff
				      * on all machines. If we don't
				      * do so, the SCSI code will not
				      * be able to allocate any mem
				      * for transfers, unless we are
				      * dealing with a Z2 mem only
				      * system.                  /Jes
				      */

  mach_set_clock_mmss  = amiga_set_clock_mmss;
  mach_get_ss          = amiga_get_ss;
  mach_reset           = amiga_reset;
#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
  mach_beep            = amiga_mksound;
#endif

#ifdef CONFIG_HEARTBEAT
  mach_heartbeat = amiga_heartbeat;
#endif

  /* Fill in the clock values (based on the 700 kHz E-Clock) */
  amiga_masterclock = 40*amiga_eclock;	/* 28 MHz */
  amiga_colorclock = 5*amiga_eclock;	/* 3.5 MHz */

  /* clear all DMA bits */
  amiga_custom.dmacon = DMAF_ALL;
  /* ensure that the DMA master bit is set */
  amiga_custom.dmacon = DMAF_SETCLR | DMAF_MASTER;

  /* don't use Z2 RAM as system memory on Z3 capable machines */
  if (AMIGAHW_PRESENT(ZORRO3)) {
    int i, j;
    u32 disabled_z2mem = 0;
    for (i = 0; i < m68k_num_memory; i++)
      if (m68k_memory[i].addr < 16*1024*1024) {
	if (i == 0) {
	  /* don't cut off the branch we're sitting on */
	  printk("Warning: kernel runs in Zorro II memory\n");
	  continue;
	}
	disabled_z2mem += m68k_memory[i].size;
	m68k_num_memory--;
	for (j = i; j < m68k_num_memory; j++)
	  m68k_memory[j] = m68k_memory[j+1];
	i--;
      }
    if (disabled_z2mem)
      printk("%dK of Zorro II memory will not be used as system memory\n",
	     disabled_z2mem>>10);
  }

  /* request all RAM */
  for (i = 0; i < m68k_num_memory; i++) {
    ram_resource[i].name =
      (m68k_memory[i].addr >= 0x01000000) ? "32-bit Fast RAM" :
      (m68k_memory[i].addr < 0x00c00000) ? "16-bit Fast RAM" :
      "16-bit Slow RAM";
    ram_resource[i].start = m68k_memory[i].addr;
    ram_resource[i].end = m68k_memory[i].addr+m68k_memory[i].size-1;
    request_resource(&iomem_resource, &ram_resource[i]);
  }

  /* initialize chipram allocator */
  amiga_chip_init ();

  /* debugging using chipram */
  if (!strcmp( m68k_debug_device, "mem" )){
	  if (!AMIGAHW_PRESENT(CHIP_RAM))
		  printk("Warning: no chipram present for debugging\n");
	  else {
		  amiga_savekmsg_init();
		  amiga_console_driver.write = amiga_mem_console_write;
		  register_console(&amiga_console_driver);
	  }
  }

  /* our beloved beeper */
  if (AMIGAHW_PRESENT(AMI_AUDIO))
	  amiga_init_sound();

  /*
   * if it is an A3000, set the magic bit that forces
   * a hard rekick
   */
  if (AMIGAHW_PRESENT(MAGIC_REKICK))
	  *(unsigned char *)ZTWO_VADDR(0xde0002) |= 0x80;
}

static unsigned short jiffy_ticks;

static void __init amiga_sched_init(irqreturn_t (*timer_routine)(int, void *,
							  struct pt_regs *))
{
	static struct resource sched_res = {
	    .name = "timer", .start = 0x00bfd400, .end = 0x00bfd5ff,
	};
	jiffy_ticks = (amiga_eclock+HZ/2)/HZ;

	if (request_resource(&mb_resources._ciab, &sched_res))
	    printk("Cannot allocate ciab.ta{lo,hi}\n");
	ciab.cra &= 0xC0;   /* turn off timer A, continuous mode, from Eclk */
	ciab.talo = jiffy_ticks % 256;
	ciab.tahi = jiffy_ticks / 256;

	/* install interrupt service routine for CIAB Timer A
	 *
	 * Please don't change this to use ciaa, as it interferes with the
	 * SCSI code. We'll have to take a look at this later
	 */
	request_irq(IRQ_AMIGA_CIAB_TA, timer_routine, 0, "timer", NULL);
	/* start timer */
	ciab.cra |= 0x11;
}

#define TICK_SIZE 10000

/* This is always executed with interrupts disabled.  */
static unsigned long amiga_gettimeoffset (void)
{
	unsigned short hi, lo, hi2;
	unsigned long ticks, offset = 0;

	/* read CIA B timer A current value */
	hi  = ciab.tahi;
	lo  = ciab.talo;
	hi2 = ciab.tahi;

	if (hi != hi2) {
		lo = ciab.talo;
		hi = hi2;
	}

	ticks = hi << 8 | lo;

	if (ticks > jiffy_ticks / 2)
		/* check for pending interrupt */
		if (cia_set_irq(&ciab_base, 0) & CIA_ICR_TA)
			offset = 10000;

	ticks = jiffy_ticks - ticks;
	ticks = (10000 * ticks) / jiffy_ticks;

	return ticks + offset;
}

static int a3000_hwclk(int op, struct rtc_time *t)
{
	tod_3000.cntrl1 = TOD3000_CNTRL1_HOLD;

	if (!op) { /* read */
		t->tm_sec  = tod_3000.second1 * 10 + tod_3000.second2;
		t->tm_min  = tod_3000.minute1 * 10 + tod_3000.minute2;
		t->tm_hour = tod_3000.hour1   * 10 + tod_3000.hour2;
		t->tm_mday = tod_3000.day1    * 10 + tod_3000.day2;
		t->tm_wday = tod_3000.weekday;
		t->tm_mon  = tod_3000.month1  * 10 + tod_3000.month2 - 1;
		t->tm_year = tod_3000.year1   * 10 + tod_3000.year2;
		if (t->tm_year <= 69)
			t->tm_year += 100;
	} else {
		tod_3000.second1 = t->tm_sec / 10;
		tod_3000.second2 = t->tm_sec % 10;
		tod_3000.minute1 = t->tm_min / 10;
		tod_3000.minute2 = t->tm_min % 10;
		tod_3000.hour1   = t->tm_hour / 10;
		tod_3000.hour2   = t->tm_hour % 10;
		tod_3000.day1    = t->tm_mday / 10;
		tod_3000.day2    = t->tm_mday % 10;
		if (t->tm_wday != -1)
			tod_3000.weekday = t->tm_wday;
		tod_3000.month1  = (t->tm_mon + 1) / 10;
		tod_3000.month2  = (t->tm_mon + 1) % 10;
		if (t->tm_year >= 100)
			t->tm_year -= 100;
		tod_3000.year1   = t->tm_year / 10;
		tod_3000.year2   = t->tm_year % 10;
	}

	tod_3000.cntrl1 = TOD3000_CNTRL1_FREE;

	return 0;
}

static int a2000_hwclk(int op, struct rtc_time *t)
{
	int cnt = 5;

	tod_2000.cntrl1 = TOD2000_CNTRL1_HOLD;

	while ((tod_2000.cntrl1 & TOD2000_CNTRL1_BUSY) && cnt--)
	{
	        tod_2000.cntrl1 &= ~TOD2000_CNTRL1_HOLD;
	        udelay(70);
	        tod_2000.cntrl1 |= TOD2000_CNTRL1_HOLD;
	}

	if (!cnt)
		printk(KERN_INFO "hwclk: timed out waiting for RTC (0x%x)\n", tod_2000.cntrl1);

	if (!op) { /* read */
		t->tm_sec  = tod_2000.second1     * 10 + tod_2000.second2;
		t->tm_min  = tod_2000.minute1     * 10 + tod_2000.minute2;
		t->tm_hour = (tod_2000.hour1 & 3) * 10 + tod_2000.hour2;
		t->tm_mday = tod_2000.day1        * 10 + tod_2000.day2;
		t->tm_wday = tod_2000.weekday;
		t->tm_mon  = tod_2000.month1      * 10 + tod_2000.month2 - 1;
		t->tm_year = tod_2000.year1       * 10 + tod_2000.year2;
		if (t->tm_year <= 69)
			t->tm_year += 100;

		if (!(tod_2000.cntrl3 & TOD2000_CNTRL3_24HMODE)){
			if (!(tod_2000.hour1 & TOD2000_HOUR1_PM) && t->tm_hour == 12)
				t->tm_hour = 0;
			else if ((tod_2000.hour1 & TOD2000_HOUR1_PM) && t->tm_hour != 12)
				t->tm_hour += 12;
		}
	} else {
		tod_2000.second1 = t->tm_sec / 10;
		tod_2000.second2 = t->tm_sec % 10;
		tod_2000.minute1 = t->tm_min / 10;
		tod_2000.minute2 = t->tm_min % 10;
		if (tod_2000.cntrl3 & TOD2000_CNTRL3_24HMODE)
			tod_2000.hour1 = t->tm_hour / 10;
		else if (t->tm_hour >= 12)
			tod_2000.hour1 = TOD2000_HOUR1_PM +
				(t->tm_hour - 12) / 10;
		else
			tod_2000.hour1 = t->tm_hour / 10;
		tod_2000.hour2   = t->tm_hour % 10;
		tod_2000.day1    = t->tm_mday / 10;
		tod_2000.day2    = t->tm_mday % 10;
		if (t->tm_wday != -1)
			tod_2000.weekday = t->tm_wday;
		tod_2000.month1  = (t->tm_mon + 1) / 10;
		tod_2000.month2  = (t->tm_mon + 1) % 10;
		if (t->tm_year >= 100)
			t->tm_year -= 100;
		tod_2000.year1   = t->tm_year / 10;
		tod_2000.year2   = t->tm_year % 10;
	}

	tod_2000.cntrl1 &= ~TOD2000_CNTRL1_HOLD;

	return 0;
}

static int amiga_set_clock_mmss (unsigned long nowtime)
{
	short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;

	if (AMIGAHW_PRESENT(A3000_CLK)) {
		tod_3000.cntrl1 = TOD3000_CNTRL1_HOLD;

		tod_3000.second1 = real_seconds / 10;
		tod_3000.second2 = real_seconds % 10;
		tod_3000.minute1 = real_minutes / 10;
		tod_3000.minute2 = real_minutes % 10;

		tod_3000.cntrl1 = TOD3000_CNTRL1_FREE;
	} else /* if (AMIGAHW_PRESENT(A2000_CLK)) */ {
		int cnt = 5;

		tod_2000.cntrl1 |= TOD2000_CNTRL1_HOLD;

		while ((tod_2000.cntrl1 & TOD2000_CNTRL1_BUSY) && cnt--)
		{
			tod_2000.cntrl1 &= ~TOD2000_CNTRL1_HOLD;
			udelay(70);
			tod_2000.cntrl1 |= TOD2000_CNTRL1_HOLD;
		}

		if (!cnt)
			printk(KERN_INFO "set_clock_mmss: timed out waiting for RTC (0x%x)\n", tod_2000.cntrl1);

		tod_2000.second1 = real_seconds / 10;
		tod_2000.second2 = real_seconds % 10;
		tod_2000.minute1 = real_minutes / 10;
		tod_2000.minute2 = real_minutes % 10;

		tod_2000.cntrl1 &= ~TOD2000_CNTRL1_HOLD;
	}

	return 0;
}

static unsigned int amiga_get_ss( void )
{
	unsigned int s;

	if (AMIGAHW_PRESENT(A3000_CLK)) {
		tod_3000.cntrl1 = TOD3000_CNTRL1_HOLD;
		s = tod_3000.second1 * 10 + tod_3000.second2;
		tod_3000.cntrl1 = TOD3000_CNTRL1_FREE;
	} else /* if (AMIGAHW_PRESENT(A2000_CLK)) */ {
		s = tod_2000.second1 * 10 + tod_2000.second2;
	}
	return s;
}

static NORET_TYPE void amiga_reset( void )
    ATTRIB_NORET;

static void amiga_reset (void)
{
  unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040);
  unsigned long jmp_addr = virt_to_phys(&&jmp_addr_label);

  local_irq_disable();
  if (CPU_IS_040_OR_060)
    /* Setup transparent translation registers for mapping
     * of 16 MB kernel segment before disabling translation
     */
    __asm__ __volatile__
      ("movel    %0,%/d0\n\t"
       "andl     #0xff000000,%/d0\n\t"
       "orw      #0xe020,%/d0\n\t"   /* map 16 MB, enable, cacheable */
       ".chip    68040\n\t"
       "movec    %%d0,%%itt0\n\t"
       "movec    %%d0,%%dtt0\n\t"
       ".chip    68k\n\t"
       "jmp      %0@\n\t"
       : /* no outputs */
       : "a" (jmp_addr040));
  else
    /* for 680[23]0, just disable translation and jump to the physical
     * address of the label
     */
    __asm__ __volatile__
      ("pmove  %/tc,%@\n\t"
       "bclr   #7,%@\n\t"
       "pmove  %@,%/tc\n\t"
       "jmp    %0@\n\t"
       : /* no outputs */
       : "a" (jmp_addr));
 jmp_addr_label040:
  /* disable translation on '040 now */
  __asm__ __volatile__
    ("moveq #0,%/d0\n\t"
     ".chip 68040\n\t"
     "movec %%d0,%%tc\n\t"	/* disable MMU */
     ".chip 68k\n\t"
     : /* no outputs */
     : /* no inputs */
     : "d0");

 jmp_addr_label:
  /* pickup reset address from AmigaOS ROM, reset devices and jump
   * to reset address
   */
  __asm__ __volatile__
    ("movew #0x2700,%/sr\n\t"
     "leal  0x01000000,%/a0\n\t"
     "subl  %/a0@(-0x14),%/a0\n\t"
     "movel %/a0@(4),%/a0\n\t"
     "subql #2,%/a0\n\t"
     "bra   1f\n\t"
     /* align on a longword boundary */
     __ALIGN_STR "\n"
     "1:\n\t"
     "reset\n\t"
     "jmp   %/a0@" : /* Just that gcc scans it for % escapes */ );

  for (;;);

}


    /*
     *  Debugging
     */

#define SAVEKMSG_MAXMEM		128*1024

#define SAVEKMSG_MAGIC1		0x53415645	/* 'SAVE' */
#define SAVEKMSG_MAGIC2		0x4B4D5347	/* 'KMSG' */

struct savekmsg {
    unsigned long magic1;		/* SAVEKMSG_MAGIC1 */
    unsigned long magic2;		/* SAVEKMSG_MAGIC2 */
    unsigned long magicptr;		/* address of magic1 */
    unsigned long size;
    char data[0];
};

static struct savekmsg *savekmsg;

static void amiga_mem_console_write(struct console *co, const char *s,
				    unsigned int count)
{
    if (savekmsg->size+count <= SAVEKMSG_MAXMEM-sizeof(struct savekmsg)) {
        memcpy(savekmsg->data+savekmsg->size, s, count);
        savekmsg->size += count;
    }
}

static void amiga_savekmsg_init(void)
{
    static struct resource debug_res = { .name = "Debug" };

    savekmsg = amiga_chip_alloc_res(SAVEKMSG_MAXMEM, &debug_res);
    savekmsg->magic1 = SAVEKMSG_MAGIC1;
    savekmsg->magic2 = SAVEKMSG_MAGIC2;
    savekmsg->magicptr = ZTWO_PADDR(savekmsg);
    savekmsg->size = 0;
}

static void amiga_serial_putc(char c)
{
    amiga_custom.serdat = (unsigned char)c | 0x100;
    while (!(amiga_custom.serdatr & 0x2000))
	;
}

void amiga_serial_console_write(struct console *co, const char *s,
				       unsigned int count)
{
    while (count--) {
	if (*s == '\n')
	    amiga_serial_putc('\r');
	amiga_serial_putc(*s++);
    }
}

#ifdef CONFIG_SERIAL_CONSOLE
void amiga_serial_puts(const char *s)
{
    amiga_serial_console_write(NULL, s, strlen(s));
}

int amiga_serial_console_wait_key(struct console *co)
{
    int ch;

    while (!(amiga_custom.intreqr & IF_RBF))
	barrier();
    ch = amiga_custom.serdatr & 0xff;
    /* clear the interrupt, so that another character can be read */
    amiga_custom.intreq = IF_RBF;
    return ch;
}

void amiga_serial_gets(struct console *co, char *s, int len)
{
    int ch, cnt = 0;

    while (1) {
	ch = amiga_serial_console_wait_key(co);

	/* Check for backspace. */
	if (ch == 8 || ch == 127) {
	    if (cnt == 0) {
		amiga_serial_putc('\007');
		continue;
	    }
	    cnt--;
	    amiga_serial_puts("\010 \010");
	    continue;
	}

	/* Check for enter. */
	if (ch == 10 || ch == 13)
	    break;

	/* See if line is too long. */
	if (cnt >= len + 1) {
	    amiga_serial_putc(7);
	    cnt--;
	    continue;
	}

	/* Store and echo character. */
	s[cnt++] = ch;
	amiga_serial_putc(ch);
    }
    /* Print enter. */
    amiga_serial_puts("\r\n");
    s[cnt] = 0;
}
#endif

static void __init amiga_debug_init(void)
{
	if (!strcmp( m68k_debug_device, "ser" )) {
		/* no initialization required (?) */
		amiga_console_driver.write = amiga_serial_console_write;
		register_console(&amiga_console_driver);
	}
}

#ifdef CONFIG_HEARTBEAT
static void amiga_heartbeat(int on)
{
    if (on)
	ciaa.pra &= ~2;
    else
	ciaa.pra |= 2;
}
#endif

    /*
     *  Amiga specific parts of /proc
     */

static void amiga_get_model(char *model)
{
    strcpy(model, amiga_model_name);
}


static int amiga_get_hardware_list(char *buffer)
{
    int len = 0;

    if (AMIGAHW_PRESENT(CHIP_RAM))
	len += sprintf(buffer+len, "Chip RAM:\t%ldK\n", amiga_chip_size>>10);
    len += sprintf(buffer+len, "PS Freq:\t%dHz\nEClock Freq:\t%ldHz\n",
		   amiga_psfreq, amiga_eclock);
    if (AMIGAHW_PRESENT(AMI_VIDEO)) {
	char *type;
	switch(amiga_chipset) {
	    case CS_OCS:
		type = "OCS";
		break;
	    case CS_ECS:
		type = "ECS";
		break;
	    case CS_AGA:
		type = "AGA";
		break;
	    default:
		type = "Old or Unknown";
		break;
	}
	len += sprintf(buffer+len, "Graphics:\t%s\n", type);
    }

#define AMIGAHW_ANNOUNCE(name, str)			\
    if (AMIGAHW_PRESENT(name))				\
	len += sprintf (buffer+len, "\t%s\n", str)

    len += sprintf (buffer + len, "Detected hardware:\n");

    AMIGAHW_ANNOUNCE(AMI_VIDEO, "Amiga Video");
    AMIGAHW_ANNOUNCE(AMI_BLITTER, "Blitter");
    AMIGAHW_ANNOUNCE(AMBER_FF, "Amber Flicker Fixer");
    AMIGAHW_ANNOUNCE(AMI_AUDIO, "Amiga Audio");
    AMIGAHW_ANNOUNCE(AMI_FLOPPY, "Floppy Controller");
    AMIGAHW_ANNOUNCE(A3000_SCSI, "SCSI Controller WD33C93 (A3000 style)");
    AMIGAHW_ANNOUNCE(A4000_SCSI, "SCSI Controller NCR53C710 (A4000T style)");
    AMIGAHW_ANNOUNCE(A1200_IDE, "IDE Interface (A1200 style)");
    AMIGAHW_ANNOUNCE(A4000_IDE, "IDE Interface (A4000 style)");
    AMIGAHW_ANNOUNCE(CD_ROM, "Internal CD ROM drive");
    AMIGAHW_ANNOUNCE(AMI_KEYBOARD, "Keyboard");
    AMIGAHW_ANNOUNCE(AMI_MOUSE, "Mouse Port");
    AMIGAHW_ANNOUNCE(AMI_SERIAL, "Serial Port");
    AMIGAHW_ANNOUNCE(AMI_PARALLEL, "Parallel Port");
    AMIGAHW_ANNOUNCE(A2000_CLK, "Hardware Clock (A2000 style)");
    AMIGAHW_ANNOUNCE(A3000_CLK, "Hardware Clock (A3000 style)");
    AMIGAHW_ANNOUNCE(CHIP_RAM, "Chip RAM");
    AMIGAHW_ANNOUNCE(PAULA, "Paula 8364");
    AMIGAHW_ANNOUNCE(DENISE, "Denise 8362");
    AMIGAHW_ANNOUNCE(DENISE_HR, "Denise 8373");
    AMIGAHW_ANNOUNCE(LISA, "Lisa 8375");
    AMIGAHW_ANNOUNCE(AGNUS_PAL, "Normal/Fat PAL Agnus 8367/8371");
    AMIGAHW_ANNOUNCE(AGNUS_NTSC, "Normal/Fat NTSC Agnus 8361/8370");
    AMIGAHW_ANNOUNCE(AGNUS_HR_PAL, "Fat Hires PAL Agnus 8372");
    AMIGAHW_ANNOUNCE(AGNUS_HR_NTSC, "Fat Hires NTSC Agnus 8372");
    AMIGAHW_ANNOUNCE(ALICE_PAL, "PAL Alice 8374");
    AMIGAHW_ANNOUNCE(ALICE_NTSC, "NTSC Alice 8374");
    AMIGAHW_ANNOUNCE(MAGIC_REKICK, "Magic Hard Rekick");
    AMIGAHW_ANNOUNCE(PCMCIA, "PCMCIA Slot");
#ifdef CONFIG_ZORRO
    if (AMIGAHW_PRESENT(ZORRO))
	len += sprintf(buffer+len, "\tZorro II%s AutoConfig: %d Expansion "
				   "Device%s\n",
		       AMIGAHW_PRESENT(ZORRO3) ? "I" : "",
		       zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
#endif /* CONFIG_ZORRO */

#undef AMIGAHW_ANNOUNCE

    return(len);
}