[mirror_ubuntu-artful-kernel.git] / arch / m68k / kernel / setup.c

/*
 *  linux/arch/m68k/kernel/setup.c
 *
 *  Copyright (C) 1995  Hamish Macdonald
 */

/*
 * This file handles the architecture-dependent parts of system setup
 */

#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fs.h>
#include <linux/console.h>
#include <linux/genhd.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/seq_file.h>
#include <linux/module.h>
#include <linux/initrd.h>

#include <asm/bootinfo.h>
#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/machdep.h>
#ifdef CONFIG_AMIGA
#include <asm/amigahw.h>
#endif
#ifdef CONFIG_ATARI
#include <asm/atarihw.h>
#include <asm/atari_stram.h>
#endif
#ifdef CONFIG_SUN3X
#include <asm/dvma.h>
#endif

unsigned long m68k_machtype;
unsigned long m68k_cputype;
EXPORT_SYMBOL(m68k_machtype);
EXPORT_SYMBOL(m68k_cputype);
unsigned long m68k_fputype;
unsigned long m68k_mmutype;
#ifdef CONFIG_VME
unsigned long vme_brdtype;
EXPORT_SYMBOL(vme_brdtype);
#endif

int m68k_is040or060;
EXPORT_SYMBOL(m68k_is040or060);

extern int end;
extern unsigned long availmem;

int m68k_num_memory;
int m68k_realnum_memory;
EXPORT_SYMBOL(m68k_realnum_memory);
#ifdef CONFIG_SINGLE_MEMORY_CHUNK
unsigned long m68k_memoffset;
EXPORT_SYMBOL(m68k_memoffset);
#endif
struct mem_info m68k_memory[NUM_MEMINFO];
EXPORT_SYMBOL(m68k_memory);

static struct mem_info m68k_ramdisk;

static char m68k_command_line[CL_SIZE];

char m68k_debug_device[6] = "";
EXPORT_SYMBOL(m68k_debug_device);

void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
/* machine dependent irq functions */
void (*mach_init_IRQ) (void) __initdata = NULL;
void (*mach_get_model) (char *model);
int (*mach_get_hardware_list) (char *buffer);
/* machine dependent timer functions */
unsigned long (*mach_gettimeoffset) (void);
int (*mach_hwclk) (int, struct rtc_time*);
EXPORT_SYMBOL(mach_hwclk);
int (*mach_set_clock_mmss) (unsigned long);
unsigned int (*mach_get_ss)(void);
int (*mach_get_rtc_pll)(struct rtc_pll_info *);
int (*mach_set_rtc_pll)(struct rtc_pll_info *);
EXPORT_SYMBOL(mach_get_ss);
EXPORT_SYMBOL(mach_get_rtc_pll);
EXPORT_SYMBOL(mach_set_rtc_pll);
void (*mach_reset)( void );
void (*mach_halt)( void );
void (*mach_power_off)( void );
long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
#ifdef CONFIG_HEARTBEAT
void (*mach_heartbeat) (int);
EXPORT_SYMBOL(mach_heartbeat);
#endif
#ifdef CONFIG_M68K_L2_CACHE
void (*mach_l2_flush) (int);
#endif
#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
void (*mach_beep)(unsigned int, unsigned int);
EXPORT_SYMBOL(mach_beep);
#endif
#if defined(CONFIG_ISA) && defined(MULTI_ISA)
int isa_type;
int isa_sex;
EXPORT_SYMBOL(isa_type);
EXPORT_SYMBOL(isa_sex);
#endif

extern int amiga_parse_bootinfo(const struct bi_record *);
extern int atari_parse_bootinfo(const struct bi_record *);
extern int mac_parse_bootinfo(const struct bi_record *);
extern int q40_parse_bootinfo(const struct bi_record *);
extern int bvme6000_parse_bootinfo(const struct bi_record *);
extern int mvme16x_parse_bootinfo(const struct bi_record *);
extern int mvme147_parse_bootinfo(const struct bi_record *);
extern int hp300_parse_bootinfo(const struct bi_record *);

extern void config_amiga(void);
extern void config_atari(void);
extern void config_mac(void);
extern void config_sun3(void);
extern void config_apollo(void);
extern void config_mvme147(void);
extern void config_mvme16x(void);
extern void config_bvme6000(void);
extern void config_hp300(void);
extern void config_q40(void);
extern void config_sun3x(void);

extern void mac_debugging_short (int, short);
extern void mac_debugging_long  (int, long);

#define MASK_256K 0xfffc0000

extern void paging_init(void);

static void __init m68k_parse_bootinfo(const struct bi_record *record)
{
    while (record->tag != BI_LAST) {
	int unknown = 0;
	const unsigned long *data = record->data;
	switch (record->tag) {
	    case BI_MACHTYPE:
	    case BI_CPUTYPE:
	    case BI_FPUTYPE:
	    case BI_MMUTYPE:
		/* Already set up by head.S */
		break;

	    case BI_MEMCHUNK:
		if (m68k_num_memory < NUM_MEMINFO) {
		    m68k_memory[m68k_num_memory].addr = data[0];
		    m68k_memory[m68k_num_memory].size = data[1];
		    m68k_num_memory++;
		} else
		    printk("m68k_parse_bootinfo: too many memory chunks\n");
		break;

	    case BI_RAMDISK:
		m68k_ramdisk.addr = data[0];
		m68k_ramdisk.size = data[1];
		break;

	    case BI_COMMAND_LINE:
		strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line));
		break;

	    default:
		if (MACH_IS_AMIGA)
		    unknown = amiga_parse_bootinfo(record);
		else if (MACH_IS_ATARI)
		    unknown = atari_parse_bootinfo(record);
		else if (MACH_IS_MAC)
		    unknown = mac_parse_bootinfo(record);
		else if (MACH_IS_Q40)
		    unknown = q40_parse_bootinfo(record);
		else if (MACH_IS_BVME6000)
		    unknown = bvme6000_parse_bootinfo(record);
		else if (MACH_IS_MVME16x)
		    unknown = mvme16x_parse_bootinfo(record);
		else if (MACH_IS_MVME147)
		    unknown = mvme147_parse_bootinfo(record);
		else if (MACH_IS_HP300)
		    unknown = hp300_parse_bootinfo(record);
		else
		    unknown = 1;
	}
	if (unknown)
	    printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
		   record->tag);
	record = (struct bi_record *)((unsigned long)record+record->size);
    }

    m68k_realnum_memory = m68k_num_memory;
#ifdef CONFIG_SINGLE_MEMORY_CHUNK
    if (m68k_num_memory > 1) {
	printk("Ignoring last %i chunks of physical memory\n",
	       (m68k_num_memory - 1));
	m68k_num_memory = 1;
    }
    m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
#endif
}

void __init setup_arch(char **cmdline_p)
{
	extern int _etext, _edata, _end;
#ifndef CONFIG_SUN3
	unsigned long endmem, startmem;
#endif
	int i;
	char *p, *q;

	/* The bootinfo is located right after the kernel bss */
	m68k_parse_bootinfo((const struct bi_record *)&_end);

	if (CPU_IS_040)
		m68k_is040or060 = 4;
	else if (CPU_IS_060)
		m68k_is040or060 = 6;

	/* FIXME: m68k_fputype is passed in by Penguin booter, which can
	 * be confused by software FPU emulation. BEWARE.
	 * We should really do our own FPU check at startup.
	 * [what do we do with buggy 68LC040s? if we have problems
	 *  with them, we should add a test to check_bugs() below] */
#ifndef CONFIG_M68KFPU_EMU_ONLY
	/* clear the fpu if we have one */
	if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
		volatile int zero = 0;
		asm __volatile__ ("frestore %0" : : "m" (zero));
	}
#endif

	if (CPU_IS_060) {
		u32 pcr;

		asm (".chip 68060; movec %%pcr,%0; .chip 68k"
		     : "=d" (pcr));
		if (((pcr >> 8) & 0xff) <= 5) {
			printk("Enabling workaround for errata I14\n");
			asm (".chip 68060; movec %0,%%pcr; .chip 68k"
			     : : "d" (pcr | 0x20));
		}
	}

	init_mm.start_code = PAGE_OFFSET;
	init_mm.end_code = (unsigned long) &_etext;
	init_mm.end_data = (unsigned long) &_edata;
	init_mm.brk = (unsigned long) &_end;

	*cmdline_p = m68k_command_line;
	memcpy(boot_command_line, *cmdline_p, CL_SIZE);

	/* Parse the command line for arch-specific options.
	 * For the m68k, this is currently only "debug=xxx" to enable printing
	 * certain kernel messages to some machine-specific device.
	 */
	for( p = *cmdline_p; p && *p; ) {
	    i = 0;
	    if (!strncmp( p, "debug=", 6 )) {
		strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) );
		if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
		i = 1;
	    }
#ifdef CONFIG_ATARI
	    /* This option must be parsed very early */
	    if (!strncmp( p, "switches=", 9 )) {
		extern void atari_switches_setup( const char *, int );
		atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
				           (q - (p+9)) : strlen(p+9) );
		i = 1;
	    }
#endif

	    if (i) {
		/* option processed, delete it */
		if ((q = strchr( p, ' ' )))
		    strcpy( p, q+1 );
		else
		    *p = 0;
	    } else {
		if ((p = strchr( p, ' ' ))) ++p;
	    }
	}

#ifdef CONFIG_DUMMY_CONSOLE
	conswitchp = &dummy_con;
#endif

	switch (m68k_machtype) {
#ifdef CONFIG_AMIGA
	    case MACH_AMIGA:
		config_amiga();
		break;
#endif
#ifdef CONFIG_ATARI
	    case MACH_ATARI:
		config_atari();
		break;
#endif
#ifdef CONFIG_MAC
	    case MACH_MAC:
		config_mac();
		break;
#endif
#ifdef CONFIG_SUN3
	    case MACH_SUN3:
		config_sun3();
		break;
#endif
#ifdef CONFIG_APOLLO
	    case MACH_APOLLO:
		config_apollo();
		break;
#endif
#ifdef CONFIG_MVME147
	    case MACH_MVME147:
		config_mvme147();
		break;
#endif
#ifdef CONFIG_MVME16x
	    case MACH_MVME16x:
		config_mvme16x();
		break;
#endif
#ifdef CONFIG_BVME6000
	    case MACH_BVME6000:
		config_bvme6000();
		break;
#endif
#ifdef CONFIG_HP300
	    case MACH_HP300:
		config_hp300();
		break;
#endif
#ifdef CONFIG_Q40
	    case MACH_Q40:
	        config_q40();
		break;
#endif
#ifdef CONFIG_SUN3X
	    case MACH_SUN3X:
		config_sun3x();
		break;
#endif
	    default:
		panic ("No configuration setup");
	}

#ifndef CONFIG_SUN3
	startmem= m68k_memory[0].addr;
	endmem = startmem + m68k_memory[0].size;
	high_memory = (void *)PAGE_OFFSET;
	for (i = 0; i < m68k_num_memory; i++) {
		m68k_memory[i].size &= MASK_256K;
		if (m68k_memory[i].addr < startmem)
			startmem = m68k_memory[i].addr;
		if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
			endmem = m68k_memory[i].addr+m68k_memory[i].size;
		high_memory += m68k_memory[i].size;
	}

	availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
				      startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);

	for (i = 0; i < m68k_num_memory; i++)
		free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);

	reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);

#ifdef CONFIG_BLK_DEV_INITRD
	if (m68k_ramdisk.size) {
		reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
		initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
		initrd_end = initrd_start + m68k_ramdisk.size;
		printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
	}
#endif

#ifdef CONFIG_ATARI
	if (MACH_IS_ATARI)
		atari_stram_reserve_pages((void *)availmem);
#endif
#ifdef CONFIG_SUN3X
	if (MACH_IS_SUN3X) {
		dvma_init();
	}
#endif

#endif /* !CONFIG_SUN3 */

	paging_init();

/* set ISA defs early as possible */
#if defined(CONFIG_ISA) && defined(MULTI_ISA)
#if defined(CONFIG_Q40)
	if (MACH_IS_Q40) {
	    isa_type = Q40_ISA;
	    isa_sex = 0;
	}
#elif defined(CONFIG_GG2)
	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
	    isa_type = GG2_ISA;
	    isa_sex = 0;
	}
#elif defined(CONFIG_AMIGA_PCMCIA)
	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
	    isa_type = AG_ISA;
	    isa_sex = 1;
	}
#endif
#endif
}

static int show_cpuinfo(struct seq_file *m, void *v)
{
    const char *cpu, *mmu, *fpu;
    unsigned long clockfreq, clockfactor;

#define LOOP_CYCLES_68020	(8)
#define LOOP_CYCLES_68030	(8)
#define LOOP_CYCLES_68040	(3)
#define LOOP_CYCLES_68060	(1)

    if (CPU_IS_020) {
	cpu = "68020";
	clockfactor = LOOP_CYCLES_68020;
    } else if (CPU_IS_030) {
	cpu = "68030";
	clockfactor = LOOP_CYCLES_68030;
    } else if (CPU_IS_040) {
	cpu = "68040";
	clockfactor = LOOP_CYCLES_68040;
    } else if (CPU_IS_060) {
	cpu = "68060";
	clockfactor = LOOP_CYCLES_68060;
    } else {
	cpu = "680x0";
	clockfactor = 0;
    }

#ifdef CONFIG_M68KFPU_EMU_ONLY
    fpu="none(soft float)";
#else
    if (m68k_fputype & FPU_68881)
	fpu = "68881";
    else if (m68k_fputype & FPU_68882)
	fpu = "68882";
    else if (m68k_fputype & FPU_68040)
	fpu = "68040";
    else if (m68k_fputype & FPU_68060)
	fpu = "68060";
    else if (m68k_fputype & FPU_SUNFPA)
	fpu = "Sun FPA";
    else
	fpu = "none";
#endif

    if (m68k_mmutype & MMU_68851)
	mmu = "68851";
    else if (m68k_mmutype & MMU_68030)
	mmu = "68030";
    else if (m68k_mmutype & MMU_68040)
	mmu = "68040";
    else if (m68k_mmutype & MMU_68060)
	mmu = "68060";
    else if (m68k_mmutype & MMU_SUN3)
	mmu = "Sun-3";
    else if (m68k_mmutype & MMU_APOLLO)
	mmu = "Apollo";
    else
	mmu = "unknown";

    clockfreq = loops_per_jiffy*HZ*clockfactor;

    seq_printf(m, "CPU:\t\t%s\n"
		   "MMU:\t\t%s\n"
		   "FPU:\t\t%s\n"
		   "Clocking:\t%lu.%1luMHz\n"
		   "BogoMips:\t%lu.%02lu\n"
		   "Calibration:\t%lu loops\n",
		   cpu, mmu, fpu,
		   clockfreq/1000000,(clockfreq/100000)%10,
		   loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
		   loops_per_jiffy);
    return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
	return *pos < 1 ? (void *)1 : NULL;
}
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
	++*pos;
	return NULL;
}
static void c_stop(struct seq_file *m, void *v)
{
}
struct seq_operations cpuinfo_op = {
	.start =	c_start,
	.next =		c_next,
	.stop =		c_stop,
	.show =		show_cpuinfo,
};

int get_hardware_list(char *buffer)
{
    int len = 0;
    char model[80];
    unsigned long mem;
    int i;

    if (mach_get_model)
	mach_get_model(model);
    else
	strcpy(model, "Unknown m68k");

    len += sprintf(buffer+len, "Model:\t\t%s\n", model);
    for (mem = 0, i = 0; i < m68k_num_memory; i++)
	mem += m68k_memory[i].size;
    len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10);

    if (mach_get_hardware_list)
	len += mach_get_hardware_list(buffer+len);

    return(len);
}

void check_bugs(void)
{
#ifndef CONFIG_M68KFPU_EMU
	if (m68k_fputype == 0) {
		printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
				"WHICH IS REQUIRED BY LINUX/M68K ***\n" );
		printk( KERN_EMERG "Upgrade your hardware or join the FPU "
				"emulation project\n" );
		panic( "no FPU" );
	}
#endif /* !CONFIG_M68KFPU_EMU */
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/m68k/kernel/setup.c
	3	*
	4	* Copyright (C) 1995 Hamish Macdonald
	5	*/
	6
	7	/*
	8	* This file handles the architecture-dependent parts of system setup
	9	*/
	10
1da177e4 LT	11	#include <linux/kernel.h>
	12	#include <linux/mm.h>
	13	#include <linux/sched.h>
	14	#include <linux/delay.h>
	15	#include <linux/interrupt.h>
	16	#include <linux/fs.h>
	17	#include <linux/console.h>
	18	#include <linux/genhd.h>
	19	#include <linux/errno.h>
	20	#include <linux/string.h>
	21	#include <linux/init.h>
	22	#include <linux/bootmem.h>
	23	#include <linux/seq_file.h>
	24	#include <linux/module.h>
	25	#include <linux/initrd.h>
	26
	27	#include <asm/bootinfo.h>
	28	#include <asm/setup.h>
	29	#include <asm/irq.h>
	30	#include <asm/io.h>
	31	#include <asm/machdep.h>
	32	#ifdef CONFIG_AMIGA
	33	#include <asm/amigahw.h>
	34	#endif
	35	#ifdef CONFIG_ATARI
	36	#include <asm/atarihw.h>
	37	#include <asm/atari_stram.h>
	38	#endif
	39	#ifdef CONFIG_SUN3X
	40	#include <asm/dvma.h>
	41	#endif
	42
	43	unsigned long m68k_machtype;
	44	unsigned long m68k_cputype;
2e811488 AV	45	EXPORT_SYMBOL(m68k_machtype);
2e811488 AV	46	EXPORT_SYMBOL(m68k_cputype);
1da177e4 LT	47	unsigned long m68k_fputype;
	48	unsigned long m68k_mmutype;
	49	#ifdef CONFIG_VME
	50	unsigned long vme_brdtype;
2e811488	51	EXPORT_SYMBOL(vme_brdtype);
1da177e4 LT	52	#endif
	53
	54	int m68k_is040or060;
2e811488	55	EXPORT_SYMBOL(m68k_is040or060);
1da177e4 LT	56
	57	extern int end;
	58	extern unsigned long availmem;
	59
	60	int m68k_num_memory;
	61	int m68k_realnum_memory;
2e811488 AV	62	EXPORT_SYMBOL(m68k_realnum_memory);
2e811488 AV	63	#ifdef CONFIG_SINGLE_MEMORY_CHUNK
1da177e4	64	unsigned long m68k_memoffset;
2e811488 AV	65	EXPORT_SYMBOL(m68k_memoffset);
2e811488 AV	66	#endif
1da177e4	67	struct mem_info m68k_memory[NUM_MEMINFO];
2e811488	68	EXPORT_SYMBOL(m68k_memory);
1da177e4 LT	69
	70	static struct mem_info m68k_ramdisk;
	71
	72	static char m68k_command_line[CL_SIZE];
	73
	74	char m68k_debug_device[6] = "";
2e811488	75	EXPORT_SYMBOL(m68k_debug_device);
1da177e4	76
40220c1a	77	void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
1da177e4 LT	78	/* machine dependent irq functions */
1da177e4 LT	79	void (*mach_init_IRQ) (void) __initdata = NULL;
1da177e4 LT	80	void (mach_get_model) (char model);
1da177e4 LT	81	int (mach_get_hardware_list) (char buffer);
1da177e4 LT	82	/* machine dependent timer functions */
	83	unsigned long (*mach_gettimeoffset) (void);
	84	int (mach_hwclk) (int, struct rtc_time);
2e811488	85	EXPORT_SYMBOL(mach_hwclk);
1da177e4 LT	86	int (*mach_set_clock_mmss) (unsigned long);
	87	unsigned int (*mach_get_ss)(void);
	88	int (mach_get_rtc_pll)(struct rtc_pll_info );
	89	int (mach_set_rtc_pll)(struct rtc_pll_info );
2e811488 AV	90	EXPORT_SYMBOL(mach_get_ss);
	91	EXPORT_SYMBOL(mach_get_rtc_pll);
	92	EXPORT_SYMBOL(mach_set_rtc_pll);
1da177e4 LT	93	void (*mach_reset)( void );
	94	void (*mach_halt)( void );
	95	void (*mach_power_off)( void );
	96	long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
1da177e4 LT	97	#ifdef CONFIG_HEARTBEAT
	98	void (*mach_heartbeat) (int);
	99	EXPORT_SYMBOL(mach_heartbeat);
	100	#endif
	101	#ifdef CONFIG_M68K_L2_CACHE
	102	void (*mach_l2_flush) (int);
	103	#endif
	104	#if defined(CONFIG_INPUT_M68K_BEEP) \|\| defined(CONFIG_INPUT_M68K_BEEP_MODULE)
	105	void (*mach_beep)(unsigned int, unsigned int);
2e811488	106	EXPORT_SYMBOL(mach_beep);
1da177e4 LT	107	#endif
	108	#if defined(CONFIG_ISA) && defined(MULTI_ISA)
	109	int isa_type;
	110	int isa_sex;
aa7e02fe AV	111	EXPORT_SYMBOL(isa_type);
aa7e02fe AV	112	EXPORT_SYMBOL(isa_sex);
1da177e4 LT	113	#endif
	114
	115	extern int amiga_parse_bootinfo(const struct bi_record *);
	116	extern int atari_parse_bootinfo(const struct bi_record *);
	117	extern int mac_parse_bootinfo(const struct bi_record *);
	118	extern int q40_parse_bootinfo(const struct bi_record *);
	119	extern int bvme6000_parse_bootinfo(const struct bi_record *);
	120	extern int mvme16x_parse_bootinfo(const struct bi_record *);
	121	extern int mvme147_parse_bootinfo(const struct bi_record *);
	122	extern int hp300_parse_bootinfo(const struct bi_record *);
	123
	124	extern void config_amiga(void);
	125	extern void config_atari(void);
	126	extern void config_mac(void);
	127	extern void config_sun3(void);
	128	extern void config_apollo(void);
	129	extern void config_mvme147(void);
	130	extern void config_mvme16x(void);
	131	extern void config_bvme6000(void);
	132	extern void config_hp300(void);
	133	extern void config_q40(void);
	134	extern void config_sun3x(void);
	135
	136	extern void mac_debugging_short (int, short);
	137	extern void mac_debugging_long (int, long);
	138
	139	#define MASK_256K 0xfffc0000
	140
	141	extern void paging_init(void);
	142
	143	static void __init m68k_parse_bootinfo(const struct bi_record *record)
	144	{
	145	while (record->tag != BI_LAST) {
	146	int unknown = 0;
	147	const unsigned long *data = record->data;
	148	switch (record->tag) {
	149	case BI_MACHTYPE:
	150	case BI_CPUTYPE:
	151	case BI_FPUTYPE:
	152	case BI_MMUTYPE:
	153	/* Already set up by head.S */
	154	break;
	155
	156	case BI_MEMCHUNK:
	157	if (m68k_num_memory < NUM_MEMINFO) {
	158	m68k_memory[m68k_num_memory].addr = data[0];
	159	m68k_memory[m68k_num_memory].size = data[1];
	160	m68k_num_memory++;
	161	} else
	162	printk("m68k_parse_bootinfo: too many memory chunks\n");
	163	break;
	164
	165	case BI_RAMDISK:
	166	m68k_ramdisk.addr = data[0];
	167	m68k_ramdisk.size = data[1];
	168	break;
	169
	170	case BI_COMMAND_LINE:
	171	strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line));
	172	break;
	173
	174	default:
	175	if (MACH_IS_AMIGA)
	176	unknown = amiga_parse_bootinfo(record);
177	else if (MACH_IS_ATARI)
178	unknown = atari_parse_bootinfo(record);
179	else if (MACH_IS_MAC)
180	unknown = mac_parse_bootinfo(record);
181	else if (MACH_IS_Q40)
182	unknown = q40_parse_bootinfo(record);
183	else if (MACH_IS_BVME6000)
184	unknown = bvme6000_parse_bootinfo(record);
185	else if (MACH_IS_MVME16x)
186	unknown = mvme16x_parse_bootinfo(record);
187	else if (MACH_IS_MVME147)
188	unknown = mvme147_parse_bootinfo(record);
189	else if (MACH_IS_HP300)
190	unknown = hp300_parse_bootinfo(record);
191	else
192	unknown = 1;
193	}
194	if (unknown)
195	printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
196	record->tag);
197	record = (struct bi_record *)((unsigned long)record+record->size);
198	}
199
200	m68k_realnum_memory = m68k_num_memory;
201	#ifdef CONFIG_SINGLE_MEMORY_CHUNK
202	if (m68k_num_memory > 1) {
203	printk("Ignoring last %i chunks of physical memory\n",
204	(m68k_num_memory - 1));
205	m68k_num_memory = 1;
206	}
207	m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
208	#endif
209	}
210
211	void __init setup_arch(char **cmdline_p)
212	{
213	extern int _etext, _edata, _end;
214	#ifndef CONFIG_SUN3
215	unsigned long endmem, startmem;
216	#endif
217	int i;
218	char p, q;
219
220	/* The bootinfo is located right after the kernel bss */
221	m68k_parse_bootinfo((const struct bi_record *)&_end);
222
223	if (CPU_IS_040)
224	m68k_is040or060 = 4;
225	else if (CPU_IS_060)
226	m68k_is040or060 = 6;
227
228	/* FIXME: m68k_fputype is passed in by Penguin booter, which can
229	* be confused by software FPU emulation. BEWARE.
230	* We should really do our own FPU check at startup.
231	* [what do we do with buggy 68LC040s? if we have problems
232	* with them, we should add a test to check_bugs() below] */
233	#ifndef CONFIG_M68KFPU_EMU_ONLY
234	/* clear the fpu if we have one */
235	if (m68k_fputype & (FPU_68881\|FPU_68882\|FPU_68040\|FPU_68060)) {
236	volatile int zero = 0;
237	asm __volatile__ ("frestore %0" : : "m" (zero));
238	}
239	#endif
240
241	if (CPU_IS_060) {
242	u32 pcr;
243
244	asm (".chip 68060; movec %%pcr,%0; .chip 68k"
245	: "=d" (pcr));
246	if (((pcr >> 8) & 0xff) <= 5) {
247	printk("Enabling workaround for errata I14\n");
248	asm (".chip 68060; movec %0,%%pcr; .chip 68k"
249	: : "d" (pcr \| 0x20));
250	}
251	}
252
253	init_mm.start_code = PAGE_OFFSET;
254	init_mm.end_code = (unsigned long) &_etext;
255	init_mm.end_data = (unsigned long) &_edata;
256	init_mm.brk = (unsigned long) &_end;
257
258	*cmdline_p = m68k_command_line;
187959f3	259	memcpy(boot_command_line, *cmdline_p, CL_SIZE);
1da177e4 LT	260
	261	/* Parse the command line for arch-specific options.
	262	* For the m68k, this is currently only "debug=xxx" to enable printing
	263	* certain kernel messages to some machine-specific device.
	264	*/
	265	for( p = cmdline_p; p && p; ) {
	266	i = 0;
	267	if (!strncmp( p, "debug=", 6 )) {
	268	strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) );
	269	if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
	270	i = 1;
	271	}
	272	#ifdef CONFIG_ATARI
	273	/* This option must be parsed very early */
	274	if (!strncmp( p, "switches=", 9 )) {
	275	extern void atari_switches_setup( const char *, int );
	276	atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
	277	(q - (p+9)) : strlen(p+9) );
	278	i = 1;
	279	}
	280	#endif
	281
	282	if (i) {
	283	/* option processed, delete it */
	284	if ((q = strchr( p, ' ' )))
	285	strcpy( p, q+1 );
	286	else
	287	*p = 0;
	288	} else {
	289	if ((p = strchr( p, ' ' ))) ++p;
	290	}
	291	}
	292
0c79358b AV	293	#ifdef CONFIG_DUMMY_CONSOLE
	294	conswitchp = &dummy_con;
	295	#endif
	296
1da177e4 LT	297	switch (m68k_machtype) {
	298	#ifdef CONFIG_AMIGA
	299	case MACH_AMIGA:
	300	config_amiga();
	301	break;
	302	#endif
	303	#ifdef CONFIG_ATARI
	304	case MACH_ATARI:
	305	config_atari();
	306	break;
	307	#endif
	308	#ifdef CONFIG_MAC
	309	case MACH_MAC:
	310	config_mac();
	311	break;
	312	#endif
	313	#ifdef CONFIG_SUN3
	314	case MACH_SUN3:
	315	config_sun3();
	316	break;
	317	#endif
	318	#ifdef CONFIG_APOLLO
	319	case MACH_APOLLO:
	320	config_apollo();
	321	break;
	322	#endif
	323	#ifdef CONFIG_MVME147
	324	case MACH_MVME147:
	325	config_mvme147();
	326	break;
	327	#endif
	328	#ifdef CONFIG_MVME16x
	329	case MACH_MVME16x:
	330	config_mvme16x();
	331	break;
	332	#endif
	333	#ifdef CONFIG_BVME6000
	334	case MACH_BVME6000:
	335	config_bvme6000();
	336	break;
	337	#endif
	338	#ifdef CONFIG_HP300
	339	case MACH_HP300:
	340	config_hp300();
	341	break;
	342	#endif
	343	#ifdef CONFIG_Q40
	344	case MACH_Q40:
	345	config_q40();
	346	break;
	347	#endif
	348	#ifdef CONFIG_SUN3X
	349	case MACH_SUN3X:
	350	config_sun3x();
	351	break;
	352	#endif
	353	default:
	354	panic ("No configuration setup");
	355	}
	356
	357	#ifndef CONFIG_SUN3
	358	startmem= m68k_memory[0].addr;
	359	endmem = startmem + m68k_memory[0].size;
	360	high_memory = (void *)PAGE_OFFSET;
361	for (i = 0; i < m68k_num_memory; i++) {
362	m68k_memory[i].size &= MASK_256K;
363	if (m68k_memory[i].addr < startmem)
364	startmem = m68k_memory[i].addr;
365	if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
366	endmem = m68k_memory[i].addr+m68k_memory[i].size;
367	high_memory += m68k_memory[i].size;
368	}
369
370	availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
371	startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
372
373	for (i = 0; i < m68k_num_memory; i++)
374	free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
375
376	reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
377
378	#ifdef CONFIG_BLK_DEV_INITRD
379	if (m68k_ramdisk.size) {
380	reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
381	initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
382	initrd_end = initrd_start + m68k_ramdisk.size;
383	printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
384	}
385	#endif
386
387	#ifdef CONFIG_ATARI
388	if (MACH_IS_ATARI)
389	atari_stram_reserve_pages((void *)availmem);
390	#endif
391	#ifdef CONFIG_SUN3X
392	if (MACH_IS_SUN3X) {
393	dvma_init();
394	}
395	#endif
396
397	#endif /* !CONFIG_SUN3 */
398
399	paging_init();
400
401	/* set ISA defs early as possible */
402	#if defined(CONFIG_ISA) && defined(MULTI_ISA)
403	#if defined(CONFIG_Q40)
404	if (MACH_IS_Q40) {
405	isa_type = Q40_ISA;
406	isa_sex = 0;
407	}
408	#elif defined(CONFIG_GG2)
409	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
410	isa_type = GG2_ISA;
411	isa_sex = 0;
412	}
413	#elif defined(CONFIG_AMIGA_PCMCIA)
414	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
415	isa_type = AG_ISA;
416	isa_sex = 1;
417	}
418	#endif
419	#endif
420	}
421
422	static int show_cpuinfo(struct seq_file m, void v)
423	{
424	const char cpu, mmu, *fpu;
425	unsigned long clockfreq, clockfactor;
426
427	#define LOOP_CYCLES_68020 (8)
428	#define LOOP_CYCLES_68030 (8)
429	#define LOOP_CYCLES_68040 (3)
430	#define LOOP_CYCLES_68060 (1)
431
432	if (CPU_IS_020) {
433	cpu = "68020";
434	clockfactor = LOOP_CYCLES_68020;
435	} else if (CPU_IS_030) {
436	cpu = "68030";
437	clockfactor = LOOP_CYCLES_68030;
438	} else if (CPU_IS_040) {
439	cpu = "68040";
440	clockfactor = LOOP_CYCLES_68040;
441	} else if (CPU_IS_060) {
442	cpu = "68060";
443	clockfactor = LOOP_CYCLES_68060;
444	} else {
445	cpu = "680x0";
446	clockfactor = 0;
447	}
448
449	#ifdef CONFIG_M68KFPU_EMU_ONLY
450	fpu="none(soft float)";
451	#else
452	if (m68k_fputype & FPU_68881)
453	fpu = "68881";
454	else if (m68k_fputype & FPU_68882)
455	fpu = "68882";
456	else if (m68k_fputype & FPU_68040)
457	fpu = "68040";
458	else if (m68k_fputype & FPU_68060)
459	fpu = "68060";
460	else if (m68k_fputype & FPU_SUNFPA)
461	fpu = "Sun FPA";
462	else
463	fpu = "none";
464	#endif
465
466	if (m68k_mmutype & MMU_68851)
467	mmu = "68851";
468	else if (m68k_mmutype & MMU_68030)
469	mmu = "68030";
470	else if (m68k_mmutype & MMU_68040)
471	mmu = "68040";
472	else if (m68k_mmutype & MMU_68060)
473	mmu = "68060";
474	else if (m68k_mmutype & MMU_SUN3)
475	mmu = "Sun-3";
476	else if (m68k_mmutype & MMU_APOLLO)
477	mmu = "Apollo";
478	else
479	mmu = "unknown";
480
481	clockfreq = loops_per_jiffyHZclockfactor;
482
483	seq_printf(m, "CPU:\t\t%s\n"
484	"MMU:\t\t%s\n"
485	"FPU:\t\t%s\n"
486	"Clocking:\t%lu.%1luMHz\n"
487	"BogoMips:\t%lu.%02lu\n"
488	"Calibration:\t%lu loops\n",
489	cpu, mmu, fpu,
490	clockfreq/1000000,(clockfreq/100000)%10,
491	loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
492	loops_per_jiffy);
493	return 0;
494	}
495
496	static void c_start(struct seq_file m, loff_t *pos)
497	{
498	return pos < 1 ? (void )1 : NULL;
499	}
500	static void c_next(struct seq_file m, void v, loff_t pos)
501	{
502	++*pos;
503	return NULL;
504	}
505	static void c_stop(struct seq_file m, void v)
506	{
507	}
508	struct seq_operations cpuinfo_op = {
509	.start = c_start,
510	.next = c_next,
511	.stop = c_stop,
512	.show = show_cpuinfo,
513	};
514
515	int get_hardware_list(char *buffer)
516	{
517	int len = 0;
518	char model[80];
519	unsigned long mem;
520	int i;
521
522	if (mach_get_model)
523	mach_get_model(model);
524	else
525	strcpy(model, "Unknown m68k");
526
527	len += sprintf(buffer+len, "Model:\t\t%s\n", model);
528	for (mem = 0, i = 0; i < m68k_num_memory; i++)
529	mem += m68k_memory[i].size;
530	len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10);
531
532	if (mach_get_hardware_list)
533	len += mach_get_hardware_list(buffer+len);
534
535	return(len);
536	}
537
1da177e4 LT	538	void check_bugs(void)
	539	{
	540	#ifndef CONFIG_M68KFPU_EMU
	541	if (m68k_fputype == 0) {
	542	printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
	543	"WHICH IS REQUIRED BY LINUX/M68K ***\n" );
	544	printk( KERN_EMERG "Upgrade your hardware or join the FPU "
	545	"emulation project\n" );
	546	panic( "no FPU" );
	547	}
	548	#endif /* !CONFIG_M68KFPU_EMU */
	549	}