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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/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>
#include <linux/zorro.h>

#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 ";

static void amiga_sched_init(irq_handler_t handler);
/* 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_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);
#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_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);
      }

      /*
       * 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_max_dma_address = 0xffffffff;

      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();

      /* 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(irq_handler_t timer_routine)
{
      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 ("\n"
                  "     move.l      %0,%%d0\n"
                  "     and.l #0xff000000,%%d0\n"
                  "     or.w  #0xe020,%%d0\n"   /* map 16 MB, enable, cacheable */
                  "     .chip 68040\n"
                  "     movec %%d0,%%itt0\n"
                  "     movec %%d0,%%dtt0\n"
                  "     .chip 68k\n"
                  "     jmp   %0@\n"
                  : /* no outputs */
                  : "a" (jmp_addr040)
                  : "d0");
      else
            /* for 680[23]0, just disable translation and jump to the physical
             * address of the label
             */
            asm volatile ("\n"
                  "     pmove %%tc,%@\n"
                  "     bclr  #7,%@\n"
                  "     pmove %@,%%tc\n"
                  "     jmp   %0@\n"
                  : /* no outputs */
                  : "a" (jmp_addr));
jmp_addr_label040:
      /* disable translation on '040 now */
      asm volatile ("\n"
            "     moveq #0,%%d0\n"
            "     .chip 68040\n"
            "     movec %%d0,%%tc\n"      /* disable MMU */
            "     .chip 68k\n"
            : /* no outputs */
            : /* no inputs */
            : "d0");

      jmp_addr_label:
      /* pickup reset address from AmigaOS ROM, reset devices and jump
       * to reset address
       */
      asm volatile ("\n"
            "     move.w      #0x2700,%sr\n"
            "     lea   0x01000000,%a0\n"
            "     sub.l %a0@(-0x14),%a0\n"
            "     move.l      %a0@(4),%a0\n"
            "     subq.l      #2,%a0\n"
            "     jra   1f\n"
            /* align on a longword boundary */
            "     " __ALIGN_STR "\n"
            "1:\n"
            "     reset\n"
            "     jmp   %a0@");

      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 int __init amiga_savekmsg_setup(char *arg)
{
      static struct resource debug_res = { .name = "Debug" };

      if (!MACH_IS_AMIGA || strcmp(arg, "mem"))
            goto done;

      if (!AMIGAHW_PRESENT(CHIP_RAM)) {
            printk("Warning: no chipram present for debugging\n");
            goto done;
      }

      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;

      amiga_console_driver.write = amiga_mem_console_write;
      register_console(&amiga_console_driver);

done:
      return 0;
}

early_param("debug", amiga_savekmsg_setup);

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 int __init amiga_debug_setup(char *arg)
{
      if (MACH_IS_AMIGA && !strcmp(arg, "ser")) {
            /* no initialization required (?) */
            amiga_console_driver.write = amiga_serial_console_write;
            register_console(&amiga_console_driver);
      }
      return 0;
}

early_param("debug", amiga_debug_setup);

#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;
}

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