path: root/arch/ppc/kernel/prep_setup.c

/*
 *  linux/arch/ppc/kernel/setup.c
 *
 *  Copyright (C) 1995  Linus Torvalds
 *  Adapted from 'alpha' version by Gary Thomas
 *  Modified by Cort Dougan (cort@cs.nmt.edu)
 */

/*
 * bootup setup stuff..
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/malloc.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/major.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/blk.h>
#include <linux/ioport.h>
#include <linux/console.h>
#include <linux/timex.h>
#include <linux/pci.h>
#include <linux/openpic.h>
#include <linux/ide.h>

#include <asm/init.h>
#include <asm/mmu.h>
#include <asm/processor.h>
#include <asm/residual.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/cache.h>
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/mk48t59.h>
#include <asm/prep_nvram.h>
#include <asm/raven.h>
#include <asm/keyboard.h>

#include "time.h"
#include "local_irq.h"
#include "i8259.h"
#include "open_pic.h"

#if defined(CONFIG_SOUND) || defined(CONFIG_SOUND_MODULE)
#include <../drivers/sound/sound_config.h>
#include <../drivers/sound/dev_table.h>
#endif

unsigned char ucSystemType;
unsigned char ucBoardRev;
unsigned char ucBoardRevMaj, ucBoardRevMin;

extern unsigned long mc146818_get_rtc_time(void);
extern int mc146818_set_rtc_time(unsigned long nowtime);
extern unsigned long mk48t59_get_rtc_time(void);
extern int mk48t59_set_rtc_time(unsigned long nowtime);

extern unsigned char prep_nvram_read_val(int addr);
extern void prep_nvram_write_val(int addr,
				 unsigned char val);
extern unsigned char rs_nvram_read_val(int addr);
extern void rs_nvram_write_val(int addr,
				 unsigned char val);

extern int pckbd_setkeycode(unsigned int scancode, unsigned int keycode);
extern int pckbd_getkeycode(unsigned int scancode);
extern int pckbd_translate(unsigned char scancode, unsigned char *keycode,
			   char raw_mode);
extern char pckbd_unexpected_up(unsigned char keycode);
extern void pckbd_leds(unsigned char leds);
extern void pckbd_init_hw(void);
extern unsigned char pckbd_sysrq_xlate[128];

extern void prep_setup_pci_ptrs(void);
extern char saved_command_line[256];

int _prep_type;

#define cached_21	(((char *)(ppc_cached_irq_mask))[3])
#define cached_A1	(((char *)(ppc_cached_irq_mask))[2])

/* for the mac fs */
kdev_t boot_dev;
/* used in nasty hack for sound - see prep_setup_arch() -- Cort */
long ppc_cs4232_dma, ppc_cs4232_dma2;
unsigned long empty_zero_page[1024];

extern PTE *Hash, *Hash_end;
extern unsigned long Hash_size, Hash_mask;
extern int probingmem;
extern unsigned long loops_per_sec;

#ifdef CONFIG_BLK_DEV_RAM
extern int rd_doload;		/* 1 = load ramdisk, 0 = don't load */
extern int rd_prompt;		/* 1 = prompt for ramdisk, 0 = don't prompt */
extern int rd_image_start;	/* starting block # of image */
#endif
#ifdef CONFIG_VGA_CONSOLE
unsigned long vgacon_remap_base;
#endif

int __prep
prep_get_cpuinfo(char *buffer)
{
	extern char *Motherboard_map_name;
	int len, i;
  
#ifdef CONFIG_SMP
#define CD(X)		(cpu_data[n].X)  
#else
#define CD(X) (X)
#endif
  
	len = sprintf(buffer,"machine\t\t: PReP %s\n",Motherboard_map_name);

	
	switch ( _prep_type )
	{
	case _PREP_IBM:
		if ((*(unsigned char *)0x8000080c) & (1<<6))
			len += sprintf(buffer+len,"Upgrade CPU\n");
		len += sprintf(buffer+len,"L2\t\t: ");
		if ((*(unsigned char *)0x8000080c) & (1<<7))
		{
			len += sprintf(buffer+len,"not present\n");
			goto no_l2;
		}
		len += sprintf(buffer+len,"%sKb,",
			       (((*(unsigned char *)0x8000080d)>>2)&1)?"512":"256");
		len += sprintf(buffer+len,"%sync\n",
			       ((*(unsigned char *)0x8000080d)>>7) ? "":"a");
		break;
	case _PREP_Motorola:
		len += sprintf(buffer+len,"L2\t\t: ");
		switch(*((unsigned char *)CACHECRBA) & L2CACHE_MASK)
		{
		case L2CACHE_512KB:
			len += sprintf(buffer+len,"512Kb");
			break;
		case L2CACHE_256KB:
			len += sprintf(buffer+len,"256Kb");
			break;
		case L2CACHE_1MB:
			len += sprintf(buffer+len,"1MB");
			break;
		case L2CACHE_NONE:
			len += sprintf(buffer+len,"none\n");
			goto no_l2;
			break;
		default:
			len += sprintf(buffer+len, "%x\n",
				       *((unsigned char *)CACHECRBA));
		}
		
		len += sprintf(buffer+len,",parity %s",
			       (*((unsigned char *)CACHECRBA) & L2CACHE_PARITY) ?
			       "enabled" : "disabled");
		
		len += sprintf(buffer+len, " SRAM:");
		
		switch ( ((*((unsigned char *)CACHECRBA) & 0xf0) >> 4) & ~(0x3) )
		{
		case 1: len += sprintf(buffer+len,
				       "synchronous,parity,flow-through\n");
			break;
		case 2: len += sprintf(buffer+len,"asynchronous,no parity\n");
			break;
		case 3: len += sprintf(buffer+len,"asynchronous,parity\n");
			break;
		default:len += sprintf(buffer+len,
				       "synchronous,pipelined,no parity\n");
			break;
		}
		break;
	default:
		break;
	}
	
	
no_l2:	
	if ( res->ResidualLength == 0 )
		return len;
	
	/* print info about SIMMs */
	len += sprintf(buffer+len,"simms\t\t: ");
	for ( i = 0 ; (res->ActualNumMemories) && (i < MAX_MEMS) ; i++ )
	{
		if ( res->Memories[i].SIMMSize != 0 )
			len += sprintf(buffer+len,"%d:%ldM ",i,
				       (res->Memories[i].SIMMSize > 1024) ?
				       res->Memories[i].SIMMSize>>20 :
				       res->Memories[i].SIMMSize);
	}
	len += sprintf(buffer+len,"\n");

	return len;
}

void __init
prep_setup_arch(void)
{
	extern char cmd_line[];
	unsigned char reg;
	unsigned char ucMothMemType;
	unsigned char ucEquipPres1;

	/* init to some ~sane value until calibrate_delay() runs */
	loops_per_sec = 50000000;
	
	/* Set up floppy in PS/2 mode */
	outb(0x09, SIO_CONFIG_RA);
	reg = inb(SIO_CONFIG_RD);
	reg = (reg & 0x3F) | 0x40;
	outb(reg, SIO_CONFIG_RD);
	outb(reg, SIO_CONFIG_RD);	/* Have to write twice to change! */

	/*
	 * We need to set up the NvRAM access routines early as prep_init
	 * has yet to be called
	 */
	ppc_md.nvram_read_val = prep_nvram_read_val;
	ppc_md.nvram_write_val = prep_nvram_write_val;

	/* we should determine this according to what we find! -- Cort */
	switch ( _prep_type )
	{
	case _PREP_IBM:
		/* Enable L2.  Assume we don't need to flush -- Cort*/
		*(unsigned char *)(0x8000081c) |= 3;
		ROOT_DEV = to_kdev_t(0x0301); /* hda1 */
		break;
	case _PREP_Motorola:
		/* Enable L2.  Assume we don't need to flush -- Cort*/
		*(unsigned char *)(0x8000081c) |= 3;
		ROOT_DEV = to_kdev_t(0x0802); /* sda2 */
		break;
	case _PREP_Radstone:
		ROOT_DEV = to_kdev_t(0x0801); /* sda1 */

		/*
		 * Determine system type
		 */
		ucMothMemType=inb(0x866);
		ucEquipPres1=inb(0x80c);

		ucSystemType=((ucMothMemType&0x03)<<1) |
			     ((ucEquipPres1&0x80)>>7);
		ucSystemType^=7;

		/*
		 * Determine board revision for use by
		 * rev. specific code
		 */
		ucBoardRev=inb(0x854);
		ucBoardRevMaj=ucBoardRev>>5;
		ucBoardRevMin=ucBoardRev&0x1f;

		/*
		 * Most Radstone boards have memory mapped NvRAM
		 */
		if((ucSystemType==RS_SYS_TYPE_PPC1) && (ucBoardRevMaj<5))
		{
			ppc_md.nvram_read_val = prep_nvram_read_val;
			ppc_md.nvram_write_val = prep_nvram_write_val;
		}
		else
		{
			ppc_md.nvram_read_val = rs_nvram_read_val;
			ppc_md.nvram_write_val = rs_nvram_write_val;
		}
		break;
	}

      /* Read in NVRAM data */ 
      init_prep_nvram();
       
      /* if no bootargs, look in NVRAM */
      if ( cmd_line[0] == '\0' ) {
              char *bootargs;
              bootargs = prep_nvram_get_var("bootargs");
              if (bootargs != NULL) {
                      strcpy(cmd_line, bootargs);

                      /* again.. */
                      strcpy(saved_command_line, cmd_line);
              }
      }

	printk("Boot arguments: %s\n", cmd_line);
	
#ifdef CONFIG_SOUND_CS4232
	/*
	 * setup proper values for the cs4232 driver so we don't have
	 * to recompile for the motorola or ibm workstations sound systems.
	 * This is a really nasty hack, but unless we change the driver
	 * it's the only way to support both addrs from one binary.
	 * -- Cort
	 */
	if ( _machine == _MACH_prep )
	{
		extern struct card_info snd_installed_cards[];
		struct card_info  *snd_ptr;

		for ( snd_ptr = snd_installed_cards; 
		      snd_ptr < &snd_installed_cards[num_sound_cards];
		      snd_ptr++ )
		{
			if ( snd_ptr->card_type == SNDCARD_CS4232 )
			{
				if ( _prep_type == _PREP_Motorola )
				{
					snd_ptr->config.io_base = 0x830;
					snd_ptr->config.irq = 10;
					snd_ptr->config.dma = ppc_cs4232_dma = 6;
					snd_ptr->config.dma2 = ppc_cs4232_dma2 = 7;
				}
				if ( _prep_type == _PREP_IBM )
				{
					snd_ptr->config.io_base = 0x530;
					snd_ptr->config.irq =  5;
					snd_ptr->config.dma = ppc_cs4232_dma = 1;
					/* this is wrong - but leave it for now */
					snd_ptr->config.dma2 = ppc_cs4232_dma2 = 7;
				}
			}
		}
	}
#endif /* CONFIG_SOUND_CS4232 */	

	/*print_residual_device_info();*/
        request_region(0x20,0x20,"pic1");
	request_region(0xa0,0x20,"pic2");
	request_region(0x00,0x20,"dma1");
	request_region(0x40,0x20,"timer");
	request_region(0x80,0x10,"dma page reg");
	request_region(0xc0,0x20,"dma2");

	raven_init();

#ifdef CONFIG_VGA_CONSOLE
	/* remap the VGA memory */
	vgacon_remap_base = 0xf0000000;
	/*vgacon_remap_base = ioremap(0xc0000000, 0xba000);*/
        conswitchp = &vga_con;
#endif
}

/*
 * Determine the decrementer frequency from the residual data
 * This allows for a faster boot as we do not need to calibrate the
 * decrementer against another clock. This is important for embedded systems.
 */
void __init prep_res_calibrate_decr(void)
{
	int freq, divisor;

	freq = res->VitalProductData.ProcessorBusHz;
	divisor = 4;
	printk("time_init: decrementer frequency = %d/%d\n", freq, divisor);
	decrementer_count = freq / HZ / divisor;
	count_period_num = divisor;
	count_period_den = freq / 1000000;
}

/*
 * Uses the on-board timer to calibrate the on-chip decrementer register
 * for prep systems.  On the pmac the OF tells us what the frequency is
 * but on prep we have to figure it out.
 * -- Cort
 */
int calibrate_done = 0;
volatile int *done_ptr = &calibrate_done;

void __init
prep_calibrate_decr_handler(int            irq,
			    void           *dev,
			    struct pt_regs *regs)
{
	unsigned long freq, divisor;
	static unsigned long t1 = 0, t2 = 0;
	
	if ( !t1 )
		t1 = get_dec();
	else if (!t2)
	{
		t2 = get_dec();
		t2 = t1-t2;  /* decr's in 1/HZ */
		t2 = t2*HZ;  /* # decrs in 1s - thus in Hz */
		freq = t2 * 60;	/* try to make freq/1e6 an integer */
		divisor = 60;
		printk("time_init: decrementer frequency = %lu/%lu (%luMHz)\n",
		       freq, divisor,t2>>20);
		decrementer_count = freq / HZ / divisor;
		count_period_num = divisor;
		count_period_den = freq / 1000000;
		*done_ptr = 1;
	}
}

void __init prep_calibrate_decr(void)
{
	unsigned long flags;


	save_flags(flags);

#define TIMER0_COUNT 0x40
#define TIMER_CONTROL 0x43
	/* set timer to periodic mode */
	outb_p(0x34,TIMER_CONTROL);/* binary, mode 2, LSB/MSB, ch 0 */
	/* set the clock to ~100 Hz */
	outb_p(LATCH & 0xff , TIMER0_COUNT);	/* LSB */
	outb(LATCH >> 8 , TIMER0_COUNT);	/* MSB */
	
	if (request_irq(0, prep_calibrate_decr_handler, 0, "timer", NULL) != 0)
		panic("Could not allocate timer IRQ!");
	__sti();
	while ( ! *done_ptr ) /* nothing */; /* wait for calibrate */
        restore_flags(flags);
	free_irq( 0, NULL);
}


/* We use the NVRAM RTC to time a second to calibrate the decrementer. */
void __init mk48t59_calibrate_decr(void)
{
	unsigned long freq, divisor;
	unsigned long t1, t2;
        unsigned char save_control;
        long i;
	unsigned char sec;
 
		
	/* Make sure the time is not stopped. */
	save_control = ppc_md.nvram_read_val(MK48T59_RTC_CONTROLB);
	
	ppc_md.nvram_write_val(MK48T59_RTC_CONTROLA,
			     (save_control & (~MK48T59_RTC_CB_STOP)));

	/* Now make sure the read bit is off so the value will change. */
	save_control = ppc_md.nvram_read_val(MK48T59_RTC_CONTROLA);
	save_control &= ~MK48T59_RTC_CA_READ;
	ppc_md.nvram_write_val(MK48T59_RTC_CONTROLA, save_control);


	/* Read the seconds value to see when it changes. */
	sec = ppc_md.nvram_read_val(MK48T59_RTC_SECONDS);
	for (i = 0 ; i < 1000000 ; i++)	{ /* may take up to 1 second... */
	   if (ppc_md.nvram_read_val(MK48T59_RTC_SECONDS) != sec) {
	      break;
	   }
	}
	t1 = get_dec();

	sec = ppc_md.nvram_read_val(MK48T59_RTC_SECONDS);
	for (i = 0 ; i < 1000000 ; i++)	{ /* Should take up 1 second... */
	   if (ppc_md.nvram_read_val(MK48T59_RTC_SECONDS) != sec) {
	      break;
	   }
	}

	t2 = t1 - get_dec();

	freq = t2 * 60;	/* try to make freq/1e6 an integer */
	divisor = 60;
	printk("time_init: decrementer frequency = %lu/%lu (%luMHz)\n",
	       freq, divisor,t2>>20);
	decrementer_count = freq / HZ / divisor;
	count_period_num = divisor;
	count_period_den = freq / 1000000;
}

void __prep
prep_restart(char *cmd)
{
        unsigned long i = 10000;


	__cli();

        /* set exception prefix high - to the prom */
        _nmask_and_or_msr(0, MSR_IP);

        /* make sure bit 0 (reset) is a 0 */
        outb( inb(0x92) & ~1L , 0x92 );
        /* signal a reset to system control port A - soft reset */
        outb( inb(0x92) | 1 , 0x92 );

        while ( i != 0 ) i++;
        panic("restart failed\n");
}

/*
 * This function will restart a board regardless of port 92 functionality
 */
void __prep
prep_direct_restart(char *cmd)
{
	u32 jumpaddr=0xfff00100;
	u32 defaultmsr=MSR_IP;

	/*
	 * This will ALWAYS work regardless of port 92
	 * functionality
	 */
	__cli();

	__asm__ __volatile__("\n\
	mtspr   26, %1  /* SRR0 */
	mtspr   27, %0  /* SRR1 */
	rfi"
	:
	: "r" (defaultmsr), "r" (jumpaddr));
	/*
	 * Not reached
	 */
}

void __prep
prep_halt(void)
{
        unsigned long flags;
	__cli();
	/* set exception prefix high - to the prom */
	save_flags( flags );
	restore_flags( flags|MSR_IP );
	
	/* make sure bit 0 (reset) is a 0 */
	outb( inb(0x92) & ~1L , 0x92 );
	/* signal a reset to system control port A - soft reset */
	outb( inb(0x92) | 1 , 0x92 );
                
	while ( 1 ) ;
	/*
	 * Not reached
	 */
}

void __prep
prep_power_off(void)
{
	prep_halt();
}

int __prep
prep_setup_residual(char *buffer)
{
        int len = 0;


	/* PREP's without residual data will give incorrect values here */
	len += sprintf(len+buffer, "clock\t\t: ");
	if ( res->ResidualLength )
		len += sprintf(len+buffer, "%ldMHz\n",
		       (res->VitalProductData.ProcessorHz > 1024) ?
		       res->VitalProductData.ProcessorHz>>20 :
		       res->VitalProductData.ProcessorHz);
	else
		len += sprintf(len+buffer, "???\n");

	return len;
}

u_int __prep
prep_irq_cannonicalize(u_int irq)
{
	if (irq == 2)
	{
		return 9;
	}
	else
	{
		return irq;
	}
}

#if 0
void __prep
prep_do_IRQ(struct pt_regs *regs, int cpu, int isfake)
{
        int irq;

	if ( (irq = i8259_irq(0)) < 0 )
	{
		printk(KERN_DEBUG "Bogus interrupt from PC = %lx\n",
		       regs->nip);
		ppc_spurious_interrupts++;
		return;
	}
        ppc_irq_dispatch_handler( regs, irq );
}
#endif

int __prep
prep_get_irq(struct pt_regs *regs)
{
	return i8259_irq(smp_processor_id());
}		

void __init
prep_init_IRQ(void)
{
	int i;

	if (OpenPIC != NULL) {
		for ( i = 16 ; i < 36 ; i++ )
			irq_desc[i].handler = &open_pic;
		openpic_init(1);
	}
	
        for ( i = 0 ; i < 16  ; i++ )
                irq_desc[i].handler = &i8259_pic;
        i8259_init();
#ifdef CONFIG_SMP
	request_irq(openpic_to_irq(OPENPIC_VEC_SPURIOUS), openpic_ipi_action,
		    0, "IPI0", 0);
#endif /* CONFIG_SMP */
}

#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
/*
 * IDE stuff.
 */
void __prep
prep_ide_insw(ide_ioreg_t port, void *buf, int ns)
{
	_insw((unsigned short *)((port)+_IO_BASE), buf, ns);
}

void __prep
prep_ide_outsw(ide_ioreg_t port, void *buf, int ns)
{
	_outsw((unsigned short *)((port)+_IO_BASE), buf, ns);
}

int __prep
prep_ide_default_irq(ide_ioreg_t base)
{
	switch (base) {
		case 0x1f0: return 13;
		case 0x170: return 13;
		case 0x1e8: return 11;
		case 0x168: return 10;
		default:
                        return 0;
	}
}

ide_ioreg_t __prep
prep_ide_default_io_base(int index)
{
	switch (index) {
		case 0: return 0x1f0;
		case 1: return 0x170;
		case 2: return 0x1e8;
		case 3: return 0x168;
		default:
                        return 0;
	}
}

int __prep
prep_ide_check_region(ide_ioreg_t from, unsigned int extent)
{
        return check_region(from, extent);
}

void __prep
prep_ide_request_region(ide_ioreg_t from,
			unsigned int extent,
			const char *name)
{
        request_region(from, extent, name);
}

void __prep
prep_ide_release_region(ide_ioreg_t from,
			unsigned int extent)
{
        release_region(from, extent);
}

void __prep
prep_ide_fix_driveid(struct hd_driveid *id)
{
}

void __init
prep_ide_init_hwif_ports (hw_regs_t *hw, ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq)
{
	ide_ioreg_t reg = data_port;
	int i;

	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
		hw->io_ports[i] = reg;
		reg += 1;
	}
	if (ctrl_port) {
		hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
	} else {
		hw->io_ports[IDE_CONTROL_OFFSET] =  hw->io_ports[IDE_DATA_OFFSET] + 0x206;
	}
	if (irq != NULL)
		*irq = 0;
}
#endif

void __init
prep_init(unsigned long r3, unsigned long r4, unsigned long r5,
	  unsigned long r6, unsigned long r7)
{
	/* make a copy of residual data */
	if ( r3 )
	{
		memcpy((void *)res,(void *)(r3+KERNELBASE),
		       sizeof(RESIDUAL));
	}

	isa_io_base = PREP_ISA_IO_BASE;
	isa_mem_base = PREP_ISA_MEM_BASE;
	pci_dram_offset = PREP_PCI_DRAM_OFFSET;
	ISA_DMA_THRESHOLD = 0x00ffffff;
	DMA_MODE_READ = 0x44;
	DMA_MODE_WRITE = 0x48;

	/* figure out what kind of prep workstation we are */
	if ( res->ResidualLength != 0 )
	{
		if ( !strncmp(res->VitalProductData.PrintableModel,"IBM",3) )
			_prep_type = _PREP_IBM;
                else if (!strncmp(res->VitalProductData.PrintableModel,
                                  "Radstone",8))
                {
                        extern char *Motherboard_map_name;

                        _prep_type = _PREP_Radstone;
                        Motherboard_map_name=
                                res->VitalProductData.PrintableModel;
                }
		else
			_prep_type = _PREP_Motorola;
	}
	else /* assume motorola if no residual (netboot?) */
	{
		_prep_type = _PREP_Motorola;
	}

	prep_setup_pci_ptrs();

	ppc_md.setup_arch     = prep_setup_arch;
	ppc_md.setup_residual = prep_setup_residual;
	ppc_md.get_cpuinfo    = prep_get_cpuinfo;
	ppc_md.irq_cannonicalize = prep_irq_cannonicalize;
	ppc_md.init_IRQ       = prep_init_IRQ;
	/* this gets changed later on if we have an OpenPIC -- Cort */
	ppc_md.get_irq        = prep_get_irq;
	ppc_md.init           = NULL;

	ppc_md.restart        = prep_restart;
	ppc_md.power_off      = prep_power_off;
	ppc_md.halt           = prep_halt;

	ppc_md.time_init      = NULL;
	if (_prep_type == _PREP_Radstone) {
		/*
		 * We require a direct restart as port 92 does not work on
		 * all Radstone boards
		 */
		ppc_md.restart        = prep_direct_restart;
		/*
		 * The RTC device used varies according to board type
		 */
		if(((ucSystemType==RS_SYS_TYPE_PPC1) && (ucBoardRevMaj>=5)) ||
		   (ucSystemType==RS_SYS_TYPE_PPC1a))
		{
			ppc_md.set_rtc_time   = mk48t59_set_rtc_time;
			ppc_md.get_rtc_time   = mk48t59_get_rtc_time;
		}
		else
		{
			ppc_md.set_rtc_time   = mc146818_set_rtc_time;
			ppc_md.get_rtc_time   = mc146818_get_rtc_time;
		}
		/*
		 * Determine the decrementer rate from the residual data
		 */
		ppc_md.calibrate_decr = prep_res_calibrate_decr;
	}
	else if (_prep_type == _PREP_IBM) {
		ppc_md.set_rtc_time   = mc146818_set_rtc_time;
		ppc_md.get_rtc_time   = mc146818_get_rtc_time;
		ppc_md.calibrate_decr = prep_calibrate_decr;
	}
	else {
		ppc_md.set_rtc_time   = mk48t59_set_rtc_time;
		ppc_md.get_rtc_time   = mk48t59_get_rtc_time;
		ppc_md.calibrate_decr = mk48t59_calibrate_decr;
	}

#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
        ppc_ide_md.insw = prep_ide_insw;
        ppc_ide_md.outsw = prep_ide_outsw;
        ppc_ide_md.default_irq = prep_ide_default_irq;
        ppc_ide_md.default_io_base = prep_ide_default_io_base;
        ppc_ide_md.ide_check_region = prep_ide_check_region;
        ppc_ide_md.ide_request_region = prep_ide_request_region;
        ppc_ide_md.ide_release_region = prep_ide_release_region;
        ppc_ide_md.fix_driveid = prep_ide_fix_driveid;
        ppc_ide_md.ide_init_hwif = prep_ide_init_hwif_ports;
#endif		
        ppc_ide_md.io_base = _IO_BASE;

#ifdef CONFIG_VT
	ppc_md.kbd_setkeycode    = pckbd_setkeycode;
	ppc_md.kbd_getkeycode    = pckbd_getkeycode;
	ppc_md.kbd_translate     = pckbd_translate;
	ppc_md.kbd_unexpected_up = pckbd_unexpected_up;
	ppc_md.kbd_leds          = pckbd_leds;
	ppc_md.kbd_init_hw       = pckbd_init_hw;
#ifdef CONFIG_MAGIC_SYSRQ
	ppc_md.ppc_kbd_sysrq_xlate	 = pckbd_sysrq_xlate;
	SYSRQ_KEY = 0x54;
#endif
#endif
}

#ifdef CONFIG_SOUND_MODULE
EXPORT_SYMBOL(ppc_cs4232_dma);
EXPORT_SYMBOL(ppc_cs4232_dma2);
#endif