/*
 * $Id: setup.c,v 1.132.2.1 1999/06/03 03:03:45 paulus Exp $
 * Common prep/pmac/chrp boot and setup code.
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/reboot.h>
#include <linux/delay.h>
#include <linux/blk.h>

#include <asm/adb.h>
#include <asm/cuda.h>
#include <asm/pmu.h>
#include <asm/residual.h>
#include <asm/io.h>
#include <asm/ide.h>
#include <asm/prom.h>
#include <asm/processor.h>
#include <asm/pgtable.h>
#include <asm/bootinfo.h>
#include <asm/setup.h>
#include <asm/amigappc.h>
#include <asm/smp.h>
#ifdef CONFIG_MBX
#include <asm/mbx.h>
#include <asm/8xx_immap.h>
#endif
#include <asm/bootx.h>
#include <asm/machdep.h>

extern void pmac_init(unsigned long r3,
                      unsigned long r4,
                      unsigned long r5,
                      unsigned long r6,
                      unsigned long r7);

extern void chrp_init(unsigned long r3,
                      unsigned long r4,
                      unsigned long r5,
                      unsigned long r6,
                      unsigned long r7);

extern void prep_init(unsigned long r3,
                      unsigned long r4,
                      unsigned long r5,
                      unsigned long r6,
                      unsigned long r7);

extern void mbx_init(unsigned long r3,
		     unsigned long r4,
		     unsigned long r5,
		     unsigned long r6,
		     unsigned long r7);

extern void apus_init(unsigned long r3,
                      unsigned long r4,
                      unsigned long r5,
                      unsigned long r6,
                      unsigned long r7);

extern boot_infos_t *boot_infos;
extern char cmd_line[512];
char saved_command_line[256];
unsigned char aux_device_present;

struct ide_machdep_calls ppc_ide_md;

unsigned long ISA_DMA_THRESHOLD;
unsigned long DMA_MODE_READ, DMA_MODE_WRITE;

/* Temporary hacks until machdep.h is fully done. */
int _machine = 0;
/* do we have OF? */
int have_of = 0;
int is_prep = 0;
int is_chrp = 0;
/* For MTX/MVME boards.. with Raven/Falcon Chipset
      Real close to CHRP, but boot like PReP (via PPCbug)
      There's probably a nicer way to do this.. --Troy */
int is_powerplus = 0;

struct machdep_calls ppc_md;


/* copy of the residual data */
#ifndef CONFIG_MBX
unsigned char __res[sizeof(RESIDUAL)] __prepdata = {0,};
#else
unsigned char __res[sizeof(bd_t)] = {0,};
#endif

RESIDUAL *res = (RESIDUAL *)&__res;

/*
 * Perhaps we can put the pmac screen_info[] here
 * on pmac as well so we don't need the ifdef's.
 * Until we get multiple-console support in here
 * that is.  -- Cort
 */ 
#ifndef CONFIG_MBX
struct screen_info screen_info = {
	0, 25,			/* orig-x, orig-y */
	0,			/* unused */
	0,			/* orig-video-page */
	0,			/* orig-video-mode */
	80,			/* orig-video-cols */
	0,0,0,			/* ega_ax, ega_bx, ega_cx */
	25,			/* orig-video-lines */
	1,			/* orig-video-isVGA */
	16			/* orig-video-points */
};

/*
 * I really need to add multiple-console support... -- Cort
 */
__initfunc(int pmac_display_supported(char *name))
{
	return 0;
}
__initfunc(void pmac_find_display(void))
{
}

#else /* CONFIG_MBX */

/* We need this to satisfy some external references until we can
 * strip the kernel down.
 */
struct screen_info screen_info = {
	0, 25,			/* orig-x, orig-y */
	0,			/* unused */
	0,			/* orig-video-page */
	0,			/* orig-video-mode */
	80,			/* orig-video-cols */
	0,0,0,			/* ega_ax, ega_bx, ega_cx */
	25,			/* orig-video-lines */
	0,			/* orig-video-isVGA */
	16			/* orig-video-points */
};
#endif /* CONFIG_MBX */

void machine_restart(char *cmd)
{
	ppc_md.restart(cmd);
}
  
void machine_power_off(void)
{
	ppc_md.power_off();
}
  
void machine_halt(void)
{
	ppc_md.halt();
}
  
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
void ide_init_hwif_ports (ide_ioreg_t *p, ide_ioreg_t base, int *irq)
{
	if (ppc_ide_md.ide_init_hwif != NULL) {
		ppc_ide_md.ide_init_hwif(p, base, irq);
	}
}
#endif

unsigned long cpu_temp(void)
{
	unsigned char thres = 0;
	
#if 0
	/* disable thrm2 */
	_set_THRM2( 0 );
	/* threshold 0 C, tid: exceeding threshold, tie: don't generate interrupt */
	_set_THRM1( THRM1_V );

	/* we need 20us to do the compare - assume 300MHz processor clock */
	_set_THRM3(0);
	_set_THRM3(THRM3_E | (300*30)<<18 );

	udelay(100);
	/* wait for the compare to complete */
	/*while ( !(_get_THRM1() & THRM1_TIV) ) ;*/
	if ( !(_get_THRM1() & THRM1_TIV) )
		printk("no tiv\n");
	if ( _get_THRM1() & THRM1_TIN )
		printk("crossed\n");
	/* turn everything off */
	_set_THRM3(0);
	_set_THRM1(0);
#endif
		
	return thres;
}

int get_cpuinfo(char *buffer)
{
	unsigned long len = 0;
	unsigned long bogosum = 0;
	unsigned long i;
	
#ifdef __SMP__
#define CPU_PRESENT(x) (cpu_callin_map[(x)])
#define GET_PVR ((long int)(cpu_data[i].pvr))
#define CD(x) (cpu_data[i].x)
#else
#define CPU_PRESENT(x) ((x)==0)
#define smp_num_cpus 1
#define GET_PVR ((long int)_get_PVR())
#define CD(x) (x)
#endif	

	for ( i = 0; i < smp_num_cpus ; i++ )
	{
		if ( !CPU_PRESENT(i) )
			continue;
		if ( i )
			len += sprintf(len+buffer,"\n");
		len += sprintf(len+buffer,"processor\t: %lu\n",i);
		len += sprintf(len+buffer,"cpu\t\t: ");
	
		switch (GET_PVR >> 16)
		{
		case 1:
			len += sprintf(len+buffer, "601\n");
			break;
		case 3:
			len += sprintf(len+buffer, "603\n");
			break;
		case 4:
			len += sprintf(len+buffer, "604\n");
			break;
		case 6:
			len += sprintf(len+buffer, "603e\n");
			break;
		case 7:
			len += sprintf(len+buffer, "603ev\n");
			break;
		case 8:
			len += sprintf(len+buffer, "750\n");
			len += sprintf(len+buffer, "temperature \t: %lu C\n",
				       cpu_temp());
			break;
		case 9:
			len += sprintf(len+buffer, "604e\n");
			break;
		case 10:
			len += sprintf(len+buffer, "604ev5 (MachV)\n");
			break;
		case 50:
			len += sprintf(len+buffer, "821\n");
		case 80:
			len += sprintf(len+buffer, "860\n");
			break;
		default:
			len += sprintf(len+buffer, "unknown (%lu)\n",
				       GET_PVR>>16);
			break;
		}
		
		/*
		 * Assume here that all clock rates are the same in a
		 * smp system.  -- Cort
		 */
		if ( have_of )
		{
			struct device_node *cpu_node;
			int *fp;
			
			cpu_node = find_type_devices("cpu");
			if ( !cpu_node ) break;
			fp = (int *) get_property(cpu_node, "clock-frequency", NULL);
			if ( !fp ) break;
			len += sprintf(len+buffer, "clock\t\t: %dMHz\n",
				       *fp / 1000000);
		}

		if (ppc_md.setup_residual != NULL)
		{
			len += ppc_md.setup_residual(buffer + len);
		}
		
		len += sprintf(len+buffer, "revision\t: %ld.%ld\n",
			       (GET_PVR & 0xff00) >> 8, GET_PVR & 0xff);

		len += sprintf(buffer+len, "bogomips\t: %lu.%02lu\n",
			       (CD(loops_per_sec)+2500)/500000,
			       (CD(loops_per_sec)+2500)/5000 % 100);
		bogosum += CD(loops_per_sec);
	}

#ifdef __SMP__
	if ( i )
		len += sprintf(buffer+len, "\n");
	len += sprintf(buffer+len,"total bogomips\t: %lu.%02lu\n",
		       (bogosum+2500)/500000,
		       (bogosum+2500)/5000 % 100);
#endif /* __SMP__ */

	/*
	 * Ooh's and aah's info about zero'd pages in idle task
	 */ 
	{
		len += sprintf(buffer+len,"zero pages\t: total %lu (%luKb) "
			       "current: %lu (%luKb) hits: %lu/%lu (%lu%%)\n",
			       zero_cache_total,
			       (zero_cache_total*PAGE_SIZE)>>10,
			       zero_cache_sz,
			       (zero_cache_sz*PAGE_SIZE)>>10,
			       zero_cache_hits,zero_cache_calls,
			       /* : 1 below is so we don't div by zero */
			       (zero_cache_hits*100) /
			       ((zero_cache_calls)?zero_cache_calls:1));
	}

	if (ppc_md.get_cpuinfo != NULL)
	{
		len += ppc_md.get_cpuinfo(buffer+len);
	}

	return len;
}

/*
 * Find out what kind of machine we're on and save any data we need
 * from the early boot process (devtree is copied on pmac by prom_init() )
 */
unsigned long __init
identify_machine(unsigned long r3, unsigned long r4, unsigned long r5,
		 unsigned long r6, unsigned long r7)
{
	
#ifdef __SMP__
	if ( first_cpu_booted ) return 0;
#endif /* __SMP__ */
	
#ifndef CONFIG_MACH_SPECIFIC
	/* boot loader will tell us if we're APUS */
	if ( r3 == 0x61707573 )
	{
		_machine = _MACH_apus;
		r3 = 0;
	}
	/* prep boot loader tells us if we're prep or not */
	else if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) ) {
		_machine = _MACH_prep;
		is_prep = 1;
	} else {
		char *model;

		have_of = 1;
		
		/* prom_init has already been called from __start */
		finish_device_tree();
		/* ask the OF info if we're a chrp or pmac */
		model = get_property(find_path_device("/"), "device_type", NULL);
		if ( model && !strncmp("chrp",model,4) )
		{
			_machine = _MACH_chrp;
			is_chrp = 1;
		}
		else
		{
			model = get_property(find_path_device("/"),
					     "model", NULL);
			if ( model && !strncmp(model, "IBM", 3))
			{
				_machine = _MACH_chrp;
				is_chrp = 1;
			}
			else
			{
				_machine = _MACH_Pmac;
			}
		}

	}
#else /* CONFIG_MACH_SPECIFIC */

#ifdef CONFIG_PREP
	_machine = _MACH_prep;
	is_prep  = 1;
#elif defined(CONFIG_CHRP)
	_machine = _MACH_chrp;
	is_chrp  = 1;
	have_of  = 1;
#elif defined(CONFIG_PMAC)
	_machine = _MACH_Pmac;
	have_of  = 1;
#elif defined(CONFIG_MBX)
	_machine = _MACH_mbx;
#elif defined(CONFIG_FADS)
	_machine = _MACH_fads;
#elif defined(CONFIG_APUS)
	_machine = _MACH_apus;
#else
#error "Machine not defined correctly"
#endif /* CONFIG_APUS */
#endif /* CONFIG_MACH_SPECIFIC */

	if ( have_of )
	{
#ifdef CONFIG_MACH_SPECIFIC
		/* prom_init has already been called from __start */
		finish_device_tree();
#endif /* CONFIG_MACH_SPECIFIC	*/
		/*
		 * If we were booted via quik, r3 points to the physical
		 * address of the command-line parameters.
		 * If we were booted from an xcoff image (i.e. netbooted or
		 * booted from floppy), we get the command line from the
		 * bootargs property of the /chosen node.
		 * If an initial ramdisk is present, r3 and r4
		 * are used for initrd_start and initrd_size,
		 * otherwise they contain 0xdeadbeef.  
		 */
		cmd_line[0] = 0;
		if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
			strncpy(cmd_line, (char *)r3 + KERNELBASE,
				sizeof(cmd_line));
		} else if (boot_infos != 0) {
			/* booted by BootX - check for ramdisk */
			if (boot_infos->kernelParamsOffset != 0)
				strncpy(cmd_line, (char *) boot_infos
					+ boot_infos->kernelParamsOffset,
					sizeof(cmd_line));
#ifdef CONFIG_BLK_DEV_INITRD
			if (boot_infos->ramDisk) {
				initrd_start = (unsigned long) boot_infos
					+ boot_infos->ramDisk;
				initrd_end = initrd_start + boot_infos->ramDiskSize;
				initrd_below_start_ok = 1;
			}
#endif
		} else {
			struct device_node *chosen;
			char *p;
			
#ifdef CONFIG_BLK_DEV_INITRD
			if (r3 - KERNELBASE < 0x800000
			    && r4 != 0 && r4 != 0xdeadbeef) {
				initrd_start = r3;
				initrd_end = r3 + r4;
				ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
			}
#endif
			cmd_line[0] = 0;
			chosen = find_devices("chosen");
			if (chosen != NULL) {
				p = get_property(chosen, "bootargs", NULL);
				if (p != NULL)
					strncpy(cmd_line, p, sizeof(cmd_line));
			}
		}
		cmd_line[sizeof(cmd_line) - 1] = 0;
	}

	switch (_machine)
	{
	case _MACH_Pmac:
                pmac_init(r3, r4, r5, r6, r7);
		break;
	case _MACH_prep:
                prep_init(r3, r4, r5, r6, r7);
		break;
	case _MACH_chrp:
                chrp_init(r3, r4, r5, r6, r7);
		break;
#ifdef CONFIG_APUS
	case _MACH_apus:
                apus_init(r3, r4, r5, r6, r7);
		break;
#endif
#ifdef CONFIG_MBX
        case _MACH_mbx:
                mbx_init(r3, r4, r5, r6, r7);
                break;
#endif
	default:
		printk("Unknown machine type in identify_machine!\n");
	}

	/* Check for nobats option (used in mapin_ram). */
	if (strstr(cmd_line, "nobats")) {
		extern int __map_without_bats;
		__map_without_bats = 1;
	}
	
	return 0;
}

/* Checks "l2cr=xxxx" command-line option */
void ppc_setup_l2cr(char *str, int *ints)
{
	if ( (_get_PVR() >> 16) == 8)
	{
		unsigned long val = simple_strtoul(str, NULL, 0);
		printk(KERN_INFO "l2cr set to %lx\n", val);
		_set_L2CR(0);
		_set_L2CR(val);
	}
}

__initfunc(void
	   ppc_init(void))
{
	if (ppc_md.init != NULL) {
		ppc_md.init();
	}
}

__initfunc(void setup_arch(char **cmdline_p,
			   unsigned long * memory_start_p, unsigned long * memory_end_p))
{
	extern int panic_timeout;
	extern char _etext[], _edata[];
	extern char *klimit;
	extern unsigned long find_available_memory(void);
	extern unsigned long *end_of_DRAM;

#ifdef CONFIG_XMON
	extern void xmon_map_scc(void);
	xmon_map_scc();
	if (strstr(cmd_line, "xmon"))
		xmon(0);
#endif /* CONFIG_XMON */
 
	/* reboot on panic */	
	panic_timeout = 180;
	
	init_task.mm->start_code = PAGE_OFFSET;
	init_task.mm->end_code = (unsigned long) _etext;
	init_task.mm->end_data = (unsigned long) _edata;
	init_task.mm->brk = (unsigned long) klimit;	

	/* Save unparsed command line copy for /proc/cmdline */
	strcpy(saved_command_line, cmd_line);
	*cmdline_p = cmd_line;

	*memory_start_p = find_available_memory();
	*memory_end_p = (unsigned long) end_of_DRAM;

	ppc_md.setup_arch(memory_start_p, memory_end_p);
}

void ppc_generic_ide_fix_driveid(struct hd_driveid *id)
{
        int i;
	unsigned short *stringcast;


	id->config         = __le16_to_cpu(id->config);
	id->cyls           = __le16_to_cpu(id->cyls);
	id->reserved2      = __le16_to_cpu(id->reserved2);
	id->heads          = __le16_to_cpu(id->heads);
	id->track_bytes    = __le16_to_cpu(id->track_bytes);
	id->sector_bytes   = __le16_to_cpu(id->sector_bytes);
	id->sectors        = __le16_to_cpu(id->sectors);
	id->vendor0        = __le16_to_cpu(id->vendor0);
	id->vendor1        = __le16_to_cpu(id->vendor1);
	id->vendor2        = __le16_to_cpu(id->vendor2);
	stringcast = (unsigned short *)&id->serial_no[0];
	for (i=0; i<(20/2); i++)
	        stringcast[i] = __le16_to_cpu(stringcast[i]);
	id->buf_type       = __le16_to_cpu(id->buf_type);
	id->buf_size       = __le16_to_cpu(id->buf_size);
	id->ecc_bytes      = __le16_to_cpu(id->ecc_bytes);
	stringcast = (unsigned short *)&id->fw_rev[0];
	for (i=0; i<(8/2); i++)
	        stringcast[i] = __le16_to_cpu(stringcast[i]);
	stringcast = (unsigned short *)&id->model[0];
	for (i=0; i<(40/2); i++)
	        stringcast[i] = __le16_to_cpu(stringcast[i]);
	id->dword_io       = __le16_to_cpu(id->dword_io);
	id->reserved50     = __le16_to_cpu(id->reserved50);
	id->field_valid    = __le16_to_cpu(id->field_valid);
	id->cur_cyls       = __le16_to_cpu(id->cur_cyls);
	id->cur_heads      = __le16_to_cpu(id->cur_heads);
	id->cur_sectors    = __le16_to_cpu(id->cur_sectors);
	id->cur_capacity0  = __le16_to_cpu(id->cur_capacity0);
	id->cur_capacity1  = __le16_to_cpu(id->cur_capacity1);
	id->lba_capacity   = __le32_to_cpu(id->lba_capacity);
	id->dma_1word      = __le16_to_cpu(id->dma_1word);
	id->dma_mword      = __le16_to_cpu(id->dma_mword);
	id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes);
	id->eide_dma_min   = __le16_to_cpu(id->eide_dma_min);
	id->eide_dma_time  = __le16_to_cpu(id->eide_dma_time);
	id->eide_pio       = __le16_to_cpu(id->eide_pio);
	id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy);
	id->word69         = __le16_to_cpu(id->word69);
	id->word70         = __le16_to_cpu(id->word70);
	id->word71         = __le16_to_cpu(id->word71);
	id->word72         = __le16_to_cpu(id->word72);
	id->word73         = __le16_to_cpu(id->word73);
	id->word74         = __le16_to_cpu(id->word74);
	id->word75         = __le16_to_cpu(id->word75);
	id->word76         = __le16_to_cpu(id->word76);
	id->word77         = __le16_to_cpu(id->word77);
	id->word78         = __le16_to_cpu(id->word78);
	id->word79         = __le16_to_cpu(id->word79);
	id->word80         = __le16_to_cpu(id->word80);
	id->word81         = __le16_to_cpu(id->word81);
	id->command_sets   = __le16_to_cpu(id->command_sets);
	id->word83         = __le16_to_cpu(id->word83);
	id->word84         = __le16_to_cpu(id->word84);
	id->word85         = __le16_to_cpu(id->word85);
	id->word86         = __le16_to_cpu(id->word86);
	id->word87         = __le16_to_cpu(id->word87);
	id->dma_ultra      = __le16_to_cpu(id->dma_ultra);
	id->word89         = __le16_to_cpu(id->word89);
	id->word90         = __le16_to_cpu(id->word90);
	id->word91         = __le16_to_cpu(id->word91);
	id->word92         = __le16_to_cpu(id->word92);
	id->word93         = __le16_to_cpu(id->word93);
	id->word94         = __le16_to_cpu(id->word94);
	id->word95         = __le16_to_cpu(id->word95);
	id->word96         = __le16_to_cpu(id->word96);
	id->word97         = __le16_to_cpu(id->word97);
	id->word98         = __le16_to_cpu(id->word98);
	id->word99         = __le16_to_cpu(id->word99);
	id->word100        = __le16_to_cpu(id->word100);
	id->word101        = __le16_to_cpu(id->word101);
	id->word102        = __le16_to_cpu(id->word102);
	id->word103        = __le16_to_cpu(id->word103);
	id->word104        = __le16_to_cpu(id->word104);
	id->word105        = __le16_to_cpu(id->word105);
	id->word106        = __le16_to_cpu(id->word106);
	id->word107        = __le16_to_cpu(id->word107);
	id->word108        = __le16_to_cpu(id->word108);
	id->word109        = __le16_to_cpu(id->word109);
	id->word110        = __le16_to_cpu(id->word110);
	id->word111        = __le16_to_cpu(id->word111);
	id->word112        = __le16_to_cpu(id->word112);
	id->word113        = __le16_to_cpu(id->word113);
	id->word114        = __le16_to_cpu(id->word114);
	id->word115        = __le16_to_cpu(id->word115);
	id->word116        = __le16_to_cpu(id->word116);
	id->word117        = __le16_to_cpu(id->word117);
	id->word118        = __le16_to_cpu(id->word118);
	id->word119        = __le16_to_cpu(id->word119);
	id->word120        = __le16_to_cpu(id->word120);
	id->word121        = __le16_to_cpu(id->word121);
	id->word122        = __le16_to_cpu(id->word122);
	id->word123        = __le16_to_cpu(id->word123);
	id->word124        = __le16_to_cpu(id->word124);
	id->word125        = __le16_to_cpu(id->word125);
	id->word126        = __le16_to_cpu(id->word126);
	id->word127        = __le16_to_cpu(id->word127);
	id->security       = __le16_to_cpu(id->security);
	for (i=0; i<127; i++)
	        id->reserved[i] = __le16_to_cpu(id->reserved[i]);
}