[mirror_ubuntu-jammy-kernel.git] / arch / m68k / kernel / setup_mm.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  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/memblock.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/module.h>
#include <linux/nvram.h>
#include <linux/initrd.h>

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

#if !FPSTATESIZE || !NR_IRQS
#warning No CPU/platform type selected, your kernel will not work!
#warning Are you building an allnoconfig kernel?
#endif

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

int m68k_is040or060;
EXPORT_SYMBOL(m68k_is040or060);

extern unsigned long availmem;

int m68k_num_memory;
EXPORT_SYMBOL(m68k_num_memory);
int m68k_realnum_memory;
EXPORT_SYMBOL(m68k_realnum_memory);
unsigned long m68k_memoffset;
struct m68k_mem_info m68k_memory[NUM_MEMINFO];
EXPORT_SYMBOL(m68k_memory);

static struct m68k_mem_info m68k_ramdisk __initdata;

static char m68k_command_line[CL_SIZE] __initdata;

void (*mach_sched_init) (void) __initdata = NULL;
/* machine dependent irq functions */
void (*mach_init_IRQ) (void) __initdata = NULL;
void (*mach_get_model) (char *model);
void (*mach_get_hardware_list) (struct seq_file *m);
/* machine dependent timer functions */
int (*mach_hwclk) (int, struct rtc_time*);
EXPORT_SYMBOL(mach_hwclk);
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 );
#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_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 int apollo_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);

#define MASK_256K 0xfffc0000

extern void paging_init(void);

static void __init m68k_parse_bootinfo(const struct bi_record *record)
{
	uint16_t tag;

	save_bootinfo(record);

	while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
		int unknown = 0;
		const void *data = record->data;
		uint16_t size = be16_to_cpu(record->size);

		switch (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) {
				const struct mem_info *m = data;
				m68k_memory[m68k_num_memory].addr =
					be32_to_cpu(m->addr);
				m68k_memory[m68k_num_memory].size =
					be32_to_cpu(m->size);
				m68k_num_memory++;
			} else
				pr_warn("%s: too many memory chunks\n",
					__func__);
			break;

		case BI_RAMDISK:
			{
				const struct mem_info *m = data;
				m68k_ramdisk.addr = be32_to_cpu(m->addr);
				m68k_ramdisk.size = be32_to_cpu(m->size);
			}
			break;

		case BI_COMMAND_LINE:
			strlcpy(m68k_command_line, 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 if (MACH_IS_APOLLO)
				unknown = apollo_parse_bootinfo(record);
			else
				unknown = 1;
		}
		if (unknown)
			pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
				tag);
		record = (struct bi_record *)((unsigned long)record + size);
	}

	m68k_realnum_memory = m68k_num_memory;
#ifdef CONFIG_SINGLE_MEMORY_CHUNK
	if (m68k_num_memory > 1) {
		pr_warn("%s: ignoring last %i chunks of physical memory\n",
			__func__, (m68k_num_memory - 1));
		m68k_num_memory = 1;
	}
#endif
}

void __init setup_arch(char **cmdline_p)
{
	/* The bootinfo is located right after the kernel */
	if (!CPU_IS_COLDFIRE)
		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] */
#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
	/* clear the fpu if we have one */
	if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
		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) {
			pr_warn("Enabling workaround for errata I14\n");
			asm (".chip 68060; movec %0,%%pcr; .chip 68k"
			     : : "d" (pcr | 0x20));
		}
	}

	setup_initial_init_mm((void *)PAGE_OFFSET, _etext, _edata, _end);

#if defined(CONFIG_BOOTPARAM)
	strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
	m68k_command_line[CL_SIZE - 1] = 0;
#endif /* CONFIG_BOOTPARAM */
	process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
	*cmdline_p = m68k_command_line;
	memcpy(boot_command_line, *cmdline_p, CL_SIZE);

	parse_early_param();

	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
#ifdef CONFIG_COLDFIRE
	case MACH_M54XX:
	case MACH_M5441X:
		cf_bootmem_alloc();
		cf_mmu_context_init();
		config_BSP(NULL, 0);
		break;
#endif
	default:
		panic("No configuration setup");
	}

	paging_init();

#ifdef CONFIG_NATFEAT
	nf_init();
#endif

#ifndef CONFIG_SUN3
#ifdef CONFIG_BLK_DEV_INITRD
	if (m68k_ramdisk.size) {
		memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
		initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
		initrd_end = initrd_start + m68k_ramdisk.size;
		pr_info("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 */

/* set ISA defs early as possible */
#if defined(CONFIG_ISA) && defined(MULTI_ISA)
	if (MACH_IS_Q40) {
		isa_type = ISA_TYPE_Q40;
		isa_sex = 0;
	}
#ifdef CONFIG_AMIGA_PCMCIA
	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
		isa_type = ISA_TYPE_AG;
		isa_sex = 1;
	}
#endif
#ifdef CONFIG_ATARI_ROM_ISA
	if (MACH_IS_ATARI) {
		isa_type = ISA_TYPE_ENEC;
		isa_sex = 0;
	}
#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)
#define LOOP_CYCLES_COLDFIRE	(2)

	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 if (CPU_IS_COLDFIRE) {
		cpu = "ColdFire";
		clockfactor = LOOP_CYCLES_COLDFIRE;
	} 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 if (m68k_fputype & FPU_COLDFIRE)
		fpu = "ColdFire";
	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 if (m68k_mmutype & MMU_COLDFIRE)
		mmu = "ColdFire";
	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)
{
}
const struct seq_operations cpuinfo_op = {
	.start	= c_start,
	.next	= c_next,
	.stop	= c_stop,
	.show	= show_cpuinfo,
};

#ifdef CONFIG_PROC_HARDWARE
static int hardware_proc_show(struct seq_file *m, void *v)
{
	char model[80];
	unsigned long mem;
	int i;

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

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

	if (mach_get_hardware_list)
		mach_get_hardware_list(m);

	return 0;
}

static int __init proc_hardware_init(void)
{
	proc_create_single("hardware", 0, NULL, hardware_proc_show);
	return 0;
}
module_init(proc_hardware_init);
#endif

void check_bugs(void)
{
#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
	if (m68k_fputype == 0) {
		pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
			"WHICH IS REQUIRED BY LINUX/M68K ***\n");
		pr_emerg("Upgrade your hardware or join the FPU "
			"emulation project\n");
		panic("no FPU");
	}
#endif /* !CONFIG_M68KFPU_EMU */
}

#ifdef CONFIG_ADB
static int __init adb_probe_sync_enable (char *str) {
	extern int __adb_probe_sync;
	__adb_probe_sync = 1;
	return 1;
}

__setup("adb_sync", adb_probe_sync_enable);
#endif /* CONFIG_ADB */

#if IS_ENABLED(CONFIG_NVRAM)
#ifdef CONFIG_MAC
static unsigned char m68k_nvram_read_byte(int addr)
{
	if (MACH_IS_MAC)
		return mac_pram_read_byte(addr);
	return 0xff;
}

static void m68k_nvram_write_byte(unsigned char val, int addr)
{
	if (MACH_IS_MAC)
		mac_pram_write_byte(val, addr);
}
#endif /* CONFIG_MAC */

#ifdef CONFIG_ATARI
static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos)
{
	if (MACH_IS_ATARI)
		return atari_nvram_read(buf, count, ppos);
	else if (MACH_IS_MAC)
		return nvram_read_bytes(buf, count, ppos);
	return -EINVAL;
}

static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos)
{
	if (MACH_IS_ATARI)
		return atari_nvram_write(buf, count, ppos);
	else if (MACH_IS_MAC)
		return nvram_write_bytes(buf, count, ppos);
	return -EINVAL;
}

static long m68k_nvram_set_checksum(void)
{
	if (MACH_IS_ATARI)
		return atari_nvram_set_checksum();
	return -EINVAL;
}

static long m68k_nvram_initialize(void)
{
	if (MACH_IS_ATARI)
		return atari_nvram_initialize();
	return -EINVAL;
}
#endif /* CONFIG_ATARI */

static ssize_t m68k_nvram_get_size(void)
{
	if (MACH_IS_ATARI)
		return atari_nvram_get_size();
	else if (MACH_IS_MAC)
		return mac_pram_get_size();
	return -ENODEV;
}

/* Atari device drivers call .read (to get checksum validation) whereas
 * Mac and PowerMac device drivers just use .read_byte.
 */
const struct nvram_ops arch_nvram_ops = {
#ifdef CONFIG_MAC
	.read_byte      = m68k_nvram_read_byte,
	.write_byte     = m68k_nvram_write_byte,
#endif
#ifdef CONFIG_ATARI
	.read           = m68k_nvram_read,
	.write          = m68k_nvram_write,
	.set_checksum   = m68k_nvram_set_checksum,
	.initialize     = m68k_nvram_initialize,
#endif
	.get_size       = m68k_nvram_get_size,
};
EXPORT_SYMBOL(arch_nvram_ops);
#endif /* CONFIG_NVRAM */
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
66d857b0 GU	2	/*
	3	* linux/arch/m68k/kernel/setup.c
	4	*
	5	* Copyright (C) 1995 Hamish Macdonald
	6	*/
	7
	8	/*
	9	* This file handles the architecture-dependent parts of system setup
	10	*/
	11
	12	#include <linux/kernel.h>
	13	#include <linux/mm.h>
	14	#include <linux/sched.h>
	15	#include <linux/delay.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/fs.h>
	18	#include <linux/console.h>
	19	#include <linux/genhd.h>
	20	#include <linux/errno.h>
	21	#include <linux/string.h>
	22	#include <linux/init.h>
1008a115	23	#include <linux/memblock.h>
66d857b0 GU	24	#include <linux/proc_fs.h>
	25	#include <linux/seq_file.h>
	26	#include <linux/module.h>
d3b41b6b	27	#include <linux/nvram.h>
66d857b0 GU	28	#include <linux/initrd.h>
	29
	30	#include <asm/bootinfo.h>
abe48101	31	#include <asm/byteorder.h>
66d857b0 GU	32	#include <asm/sections.h>
	33	#include <asm/setup.h>
	34	#include <asm/fpu.h>
	35	#include <asm/irq.h>
	36	#include <asm/io.h>
	37	#include <asm/machdep.h>
	38	#ifdef CONFIG_AMIGA
	39	#include <asm/amigahw.h>
	40	#endif
66d857b0	41	#include <asm/atarihw.h>
d3b41b6b	42	#ifdef CONFIG_ATARI
66d857b0 GU	43	#include <asm/atari_stram.h>
	44	#endif
	45	#ifdef CONFIG_SUN3X
	46	#include <asm/dvma.h>
	47	#endif
d3b41b6b	48	#include <asm/macintosh.h>
66d857b0 GU	49	#include <asm/natfeat.h>
	50
	51	#if !FPSTATESIZE \|\| !NR_IRQS
	52	#warning No CPU/platform type selected, your kernel will not work!
	53	#warning Are you building an allnoconfig kernel?
	54	#endif
	55
	56	unsigned long m68k_machtype;
	57	EXPORT_SYMBOL(m68k_machtype);
	58	unsigned long m68k_cputype;
	59	EXPORT_SYMBOL(m68k_cputype);
	60	unsigned long m68k_fputype;
	61	unsigned long m68k_mmutype;
	62	EXPORT_SYMBOL(m68k_mmutype);
	63	#ifdef CONFIG_VME
	64	unsigned long vme_brdtype;
	65	EXPORT_SYMBOL(vme_brdtype);
	66	#endif
	67
	68	int m68k_is040or060;
	69	EXPORT_SYMBOL(m68k_is040or060);
	70
	71	extern unsigned long availmem;
	72
	73	int m68k_num_memory;
	74	EXPORT_SYMBOL(m68k_num_memory);
	75	int m68k_realnum_memory;
	76	EXPORT_SYMBOL(m68k_realnum_memory);
	77	unsigned long m68k_memoffset;
79930084	78	struct m68k_mem_info m68k_memory[NUM_MEMINFO];
66d857b0 GU	79	EXPORT_SYMBOL(m68k_memory);
66d857b0 GU	80
79930084	81	static struct m68k_mem_info m68k_ramdisk __initdata;
66d857b0	82
a4df02a2	83	static char m68k_command_line[CL_SIZE] __initdata;
66d857b0	84
f9a01539	85	void (*mach_sched_init) (void) __initdata = NULL;
66d857b0 GU	86	/* machine dependent irq functions */
	87	void (*mach_init_IRQ) (void) __initdata = NULL;
	88	void (mach_get_model) (char model);
	89	void (mach_get_hardware_list) (struct seq_file m);
	90	/* machine dependent timer functions */
66d857b0 GU	91	int (mach_hwclk) (int, struct rtc_time);
66d857b0 GU	92	EXPORT_SYMBOL(mach_hwclk);
66d857b0 GU	93	unsigned int (*mach_get_ss)(void);
	94	int (mach_get_rtc_pll)(struct rtc_pll_info );
	95	int (mach_set_rtc_pll)(struct rtc_pll_info );
	96	EXPORT_SYMBOL(mach_get_ss);
	97	EXPORT_SYMBOL(mach_get_rtc_pll);
	98	EXPORT_SYMBOL(mach_set_rtc_pll);
	99	void (*mach_reset)( void );
	100	void (*mach_halt)( void );
	101	void (*mach_power_off)( void );
66d857b0 GU	102	#ifdef CONFIG_HEARTBEAT
	103	void (*mach_heartbeat) (int);
	104	EXPORT_SYMBOL(mach_heartbeat);
	105	#endif
	106	#ifdef CONFIG_M68K_L2_CACHE
	107	void (*mach_l2_flush) (int);
	108	#endif
66d857b0 GU	109	#if defined(CONFIG_ISA) && defined(MULTI_ISA)
	110	int isa_type;
	111	int isa_sex;
	112	EXPORT_SYMBOL(isa_type);
	113	EXPORT_SYMBOL(isa_sex);
	114	#endif
	115
	116	extern int amiga_parse_bootinfo(const struct bi_record *);
	117	extern int atari_parse_bootinfo(const struct bi_record *);
	118	extern int mac_parse_bootinfo(const struct bi_record *);
	119	extern int q40_parse_bootinfo(const struct bi_record *);
	120	extern int bvme6000_parse_bootinfo(const struct bi_record *);
	121	extern int mvme16x_parse_bootinfo(const struct bi_record *);
	122	extern int mvme147_parse_bootinfo(const struct bi_record *);
	123	extern int hp300_parse_bootinfo(const struct bi_record *);
	124	extern int apollo_parse_bootinfo(const struct bi_record *);
	125
	126	extern void config_amiga(void);
	127	extern void config_atari(void);
	128	extern void config_mac(void);
	129	extern void config_sun3(void);
	130	extern void config_apollo(void);
	131	extern void config_mvme147(void);
	132	extern void config_mvme16x(void);
	133	extern void config_bvme6000(void);
	134	extern void config_hp300(void);
	135	extern void config_q40(void);
	136	extern void config_sun3x(void);
	137
	138	#define MASK_256K 0xfffc0000
	139
	140	extern void paging_init(void);
	141
	142	static void __init m68k_parse_bootinfo(const struct bi_record *record)
	143	{
abe48101 GU	144	uint16_t tag;
abe48101 GU	145
7bc1e4d8 GU	146	save_bootinfo(record);
7bc1e4d8 GU	147
abe48101	148	while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
66d857b0	149	int unknown = 0;
abe48101 GU	150	const void *data = record->data;
abe48101 GU	151	uint16_t size = be16_to_cpu(record->size);
66d857b0	152
abe48101	153	switch (tag) {
66d857b0 GU	154	case BI_MACHTYPE:
	155	case BI_CPUTYPE:
	156	case BI_FPUTYPE:
	157	case BI_MMUTYPE:
	158	/* Already set up by head.S */
	159	break;
	160
	161	case BI_MEMCHUNK:
	162	if (m68k_num_memory < NUM_MEMINFO) {
abe48101 GU	163	const struct mem_info *m = data;
	164	m68k_memory[m68k_num_memory].addr =
	165	be32_to_cpu(m->addr);
	166	m68k_memory[m68k_num_memory].size =
	167	be32_to_cpu(m->size);
66d857b0 GU	168	m68k_num_memory++;
66d857b0 GU	169	} else
6074a139 GU	170	pr_warn("%s: too many memory chunks\n",
6074a139 GU	171	__func__);
66d857b0 GU	172	break;
	173
	174	case BI_RAMDISK:
abe48101 GU	175	{
	176	const struct mem_info *m = data;
	177	m68k_ramdisk.addr = be32_to_cpu(m->addr);
	178	m68k_ramdisk.size = be32_to_cpu(m->size);
	179	}
66d857b0 GU	180	break;
	181
	182	case BI_COMMAND_LINE:
abe48101	183	strlcpy(m68k_command_line, data,
66d857b0 GU	184	sizeof(m68k_command_line));
	185	break;
	186
	187	default:
	188	if (MACH_IS_AMIGA)
	189	unknown = amiga_parse_bootinfo(record);
	190	else if (MACH_IS_ATARI)
	191	unknown = atari_parse_bootinfo(record);
	192	else if (MACH_IS_MAC)
	193	unknown = mac_parse_bootinfo(record);
	194	else if (MACH_IS_Q40)
	195	unknown = q40_parse_bootinfo(record);
	196	else if (MACH_IS_BVME6000)
	197	unknown = bvme6000_parse_bootinfo(record);
	198	else if (MACH_IS_MVME16x)
	199	unknown = mvme16x_parse_bootinfo(record);
	200	else if (MACH_IS_MVME147)
	201	unknown = mvme147_parse_bootinfo(record);
	202	else if (MACH_IS_HP300)
	203	unknown = hp300_parse_bootinfo(record);
	204	else if (MACH_IS_APOLLO)
	205	unknown = apollo_parse_bootinfo(record);
	206	else
	207	unknown = 1;
	208	}
	209	if (unknown)
6074a139	210	pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
abe48101 GU	211	tag);
abe48101 GU	212	record = (struct bi_record *)((unsigned long)record + size);
66d857b0 GU	213	}
	214
	215	m68k_realnum_memory = m68k_num_memory;
	216	#ifdef CONFIG_SINGLE_MEMORY_CHUNK
	217	if (m68k_num_memory > 1) {
6074a139 GU	218	pr_warn("%s: ignoring last %i chunks of physical memory\n",
6074a139 GU	219	__func__, (m68k_num_memory - 1));
66d857b0 GU	220	m68k_num_memory = 1;
	221	}
	222	#endif
	223	}
	224
	225	void __init setup_arch(char **cmdline_p)
	226	{
29a20203	227	/* The bootinfo is located right after the kernel */
37314540 GU	228	if (!CPU_IS_COLDFIRE)
37314540 GU	229	m68k_parse_bootinfo((const struct bi_record *)_end);
66d857b0 GU	230
	231	if (CPU_IS_040)
	232	m68k_is040or060 = 4;
	233	else if (CPU_IS_060)
	234	m68k_is040or060 = 6;
	235
	236	/* FIXME: m68k_fputype is passed in by Penguin booter, which can
	237	* be confused by software FPU emulation. BEWARE.
	238	* We should really do our own FPU check at startup.
	239	* [what do we do with buggy 68LC040s? if we have problems
	240	* with them, we should add a test to check_bugs() below] */
6d3ec805	241	#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
66d857b0	242	/* clear the fpu if we have one */
0a2796da	243	if (m68k_fputype & (FPU_68881\|FPU_68882\|FPU_68040\|FPU_68060\|FPU_COLDFIRE)) {
66d857b0 GU	244	volatile int zero = 0;
	245	asm volatile ("frestore %0" : : "m" (zero));
	246	}
	247	#endif
	248
	249	if (CPU_IS_060) {
	250	u32 pcr;
	251
	252	asm (".chip 68060; movec %%pcr,%0; .chip 68k"
	253	: "=d" (pcr));
	254	if (((pcr >> 8) & 0xff) <= 5) {
6074a139	255	pr_warn("Enabling workaround for errata I14\n");
66d857b0 GU	256	asm (".chip 68060; movec %0,%%pcr; .chip 68k"
	257	: : "d" (pcr \| 0x20));
	258	}
	259	}
	260
ed408db1	261	setup_initial_init_mm((void *)PAGE_OFFSET, _etext, _edata, _end);
66d857b0	262
d1db9120 GU	263	#if defined(CONFIG_BOOTPARAM)
	264	strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
	265	m68k_command_line[CL_SIZE - 1] = 0;
	266	#endif /* CONFIG_BOOTPARAM */
aa5ac789	267	process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
66d857b0 GU	268	*cmdline_p = m68k_command_line;
	269	memcpy(boot_command_line, *cmdline_p, CL_SIZE);
	270
	271	parse_early_param();
	272
66d857b0 GU	273	switch (m68k_machtype) {
	274	#ifdef CONFIG_AMIGA
	275	case MACH_AMIGA:
	276	config_amiga();
	277	break;
	278	#endif
	279	#ifdef CONFIG_ATARI
	280	case MACH_ATARI:
	281	config_atari();
	282	break;
	283	#endif
	284	#ifdef CONFIG_MAC
	285	case MACH_MAC:
	286	config_mac();
	287	break;
	288	#endif
	289	#ifdef CONFIG_SUN3
	290	case MACH_SUN3:
	291	config_sun3();
	292	break;
	293	#endif
	294	#ifdef CONFIG_APOLLO
	295	case MACH_APOLLO:
	296	config_apollo();
	297	break;
	298	#endif
	299	#ifdef CONFIG_MVME147
	300	case MACH_MVME147:
	301	config_mvme147();
	302	break;
	303	#endif
	304	#ifdef CONFIG_MVME16x
	305	case MACH_MVME16x:
	306	config_mvme16x();
	307	break;
	308	#endif
	309	#ifdef CONFIG_BVME6000
	310	case MACH_BVME6000:
	311	config_bvme6000();
	312	break;
	313	#endif
	314	#ifdef CONFIG_HP300
	315	case MACH_HP300:
	316	config_hp300();
	317	break;
	318	#endif
	319	#ifdef CONFIG_Q40
	320	case MACH_Q40:
	321	config_q40();
	322	break;
	323	#endif
	324	#ifdef CONFIG_SUN3X
	325	case MACH_SUN3X:
	326	config_sun3x();
	327	break;
37314540 GU	328	#endif
	329	#ifdef CONFIG_COLDFIRE
	330	case MACH_M54XX:
81d33350	331	case MACH_M5441X:
34fa9b21 GU	332	cf_bootmem_alloc();
34fa9b21 GU	333	cf_mmu_context_init();
37314540 GU	334	config_BSP(NULL, 0);
37314540 GU	335	break;
66d857b0 GU	336	#endif
	337	default:
	338	panic("No configuration setup");
	339	}
	340
7a15dd5c GU	341	paging_init();
7a15dd5c GU	342
66d857b0 GU	343	#ifdef CONFIG_NATFEAT
	344	nf_init();
	345	#endif
	346
66d857b0	347	#ifndef CONFIG_SUN3
66d857b0 GU	348	#ifdef CONFIG_BLK_DEV_INITRD
66d857b0 GU	349	if (m68k_ramdisk.size) {
1008a115	350	memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
66d857b0 GU	351	initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
66d857b0 GU	352	initrd_end = initrd_start + m68k_ramdisk.size;
6074a139	353	pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
66d857b0 GU	354	}
	355	#endif
	356
	357	#ifdef CONFIG_ATARI
	358	if (MACH_IS_ATARI)
	359	atari_stram_reserve_pages((void *)availmem);
	360	#endif
	361	#ifdef CONFIG_SUN3X
	362	if (MACH_IS_SUN3X) {
	363	dvma_init();
	364	}
	365	#endif
	366
	367	#endif /* !CONFIG_SUN3 */
	368
	369	/* set ISA defs early as possible */
	370	#if defined(CONFIG_ISA) && defined(MULTI_ISA)
	371	if (MACH_IS_Q40) {
	372	isa_type = ISA_TYPE_Q40;
	373	isa_sex = 0;
	374	}
	375	#ifdef CONFIG_AMIGA_PCMCIA
	376	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
	377	isa_type = ISA_TYPE_AG;
	378	isa_sex = 1;
	379	}
	380	#endif
84b16b7b MS	381	#ifdef CONFIG_ATARI_ROM_ISA
	382	if (MACH_IS_ATARI) {
	383	isa_type = ISA_TYPE_ENEC;
	384	isa_sex = 0;
	385	}
	386	#endif
66d857b0 GU	387	#endif
	388	}
	389
	390	static int show_cpuinfo(struct seq_file m, void v)
	391	{
	392	const char cpu, mmu, *fpu;
	393	unsigned long clockfreq, clockfactor;
	394
	395	#define LOOP_CYCLES_68020 (8)
	396	#define LOOP_CYCLES_68030 (8)
	397	#define LOOP_CYCLES_68040 (3)
	398	#define LOOP_CYCLES_68060 (1)
060632ad	399	#define LOOP_CYCLES_COLDFIRE (2)
66d857b0 GU	400
	401	if (CPU_IS_020) {
	402	cpu = "68020";
	403	clockfactor = LOOP_CYCLES_68020;
	404	} else if (CPU_IS_030) {
	405	cpu = "68030";
	406	clockfactor = LOOP_CYCLES_68030;
	407	} else if (CPU_IS_040) {
	408	cpu = "68040";
	409	clockfactor = LOOP_CYCLES_68040;
	410	} else if (CPU_IS_060) {
	411	cpu = "68060";
	412	clockfactor = LOOP_CYCLES_68060;
060632ad GU	413	} else if (CPU_IS_COLDFIRE) {
	414	cpu = "ColdFire";
	415	clockfactor = LOOP_CYCLES_COLDFIRE;
66d857b0 GU	416	} else {
	417	cpu = "680x0";
	418	clockfactor = 0;
	419	}
	420
	421	#ifdef CONFIG_M68KFPU_EMU_ONLY
	422	fpu = "none(soft float)";
	423	#else
	424	if (m68k_fputype & FPU_68881)
	425	fpu = "68881";
	426	else if (m68k_fputype & FPU_68882)
	427	fpu = "68882";
	428	else if (m68k_fputype & FPU_68040)
	429	fpu = "68040";
	430	else if (m68k_fputype & FPU_68060)
	431	fpu = "68060";
	432	else if (m68k_fputype & FPU_SUNFPA)
	433	fpu = "Sun FPA";
060632ad GU	434	else if (m68k_fputype & FPU_COLDFIRE)
060632ad GU	435	fpu = "ColdFire";
66d857b0 GU	436	else
	437	fpu = "none";
	438	#endif
	439
	440	if (m68k_mmutype & MMU_68851)
	441	mmu = "68851";
	442	else if (m68k_mmutype & MMU_68030)
	443	mmu = "68030";
	444	else if (m68k_mmutype & MMU_68040)
	445	mmu = "68040";
	446	else if (m68k_mmutype & MMU_68060)
	447	mmu = "68060";
	448	else if (m68k_mmutype & MMU_SUN3)
	449	mmu = "Sun-3";
	450	else if (m68k_mmutype & MMU_APOLLO)
	451	mmu = "Apollo";
060632ad GU	452	else if (m68k_mmutype & MMU_COLDFIRE)
060632ad GU	453	mmu = "ColdFire";
66d857b0 GU	454	else
	455	mmu = "unknown";
	456
	457	clockfreq = loops_per_jiffy * HZ * clockfactor;
	458
	459	seq_printf(m, "CPU:\t\t%s\n"
	460	"MMU:\t\t%s\n"
	461	"FPU:\t\t%s\n"
	462	"Clocking:\t%lu.%1luMHz\n"
	463	"BogoMips:\t%lu.%02lu\n"
	464	"Calibration:\t%lu loops\n",
	465	cpu, mmu, fpu,
	466	clockfreq/1000000,(clockfreq/100000)%10,
	467	loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
	468	loops_per_jiffy);
	469	return 0;
	470	}
	471
	472	static void c_start(struct seq_file m, loff_t *pos)
	473	{
	474	return pos < 1 ? (void )1 : NULL;
	475	}
	476	static void c_next(struct seq_file m, void v, loff_t pos)
	477	{
	478	++*pos;
	479	return NULL;
	480	}
	481	static void c_stop(struct seq_file m, void v)
	482	{
	483	}
	484	const struct seq_operations cpuinfo_op = {
	485	.start = c_start,
	486	.next = c_next,
	487	.stop = c_stop,
	488	.show = show_cpuinfo,
	489	};
	490
	491	#ifdef CONFIG_PROC_HARDWARE
	492	static int hardware_proc_show(struct seq_file m, void v)
	493	{
	494	char model[80];
	495	unsigned long mem;
	496	int i;
	497
	498	if (mach_get_model)
	499	mach_get_model(model);
	500	else
	501	strcpy(model, "Unknown m68k");
	502
	503	seq_printf(m, "Model:\t\t%s\n", model);
	504	for (mem = 0, i = 0; i < m68k_num_memory; i++)
	505	mem += m68k_memory[i].size;
	506	seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
	507
	508	if (mach_get_hardware_list)
	509	mach_get_hardware_list(m);
	510
	511	return 0;
	512	}
	513
66d857b0 GU	514	static int __init proc_hardware_init(void)
66d857b0 GU	515	{
3f3942ac	516	proc_create_single("hardware", 0, NULL, hardware_proc_show);
66d857b0 GU	517	return 0;
	518	}
	519	module_init(proc_hardware_init);
	520	#endif
	521
	522	void check_bugs(void)
	523	{
2a744007	524	#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
66d857b0	525	if (m68k_fputype == 0) {
6074a139	526	pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
66d857b0	527	"WHICH IS REQUIRED BY LINUX/M68K ***\n");
6074a139	528	pr_emerg("Upgrade your hardware or join the FPU "
66d857b0 GU	529	"emulation project\n");
	530	panic("no FPU");
	531	}
	532	#endif /* !CONFIG_M68KFPU_EMU */
	533	}
	534
	535	#ifdef CONFIG_ADB
	536	static int __init adb_probe_sync_enable (char *str) {
	537	extern int __adb_probe_sync;
	538	__adb_probe_sync = 1;
	539	return 1;
	540	}
	541
	542	__setup("adb_sync", adb_probe_sync_enable);
	543	#endif /* CONFIG_ADB */
d3b41b6b FT	544
	545	#if IS_ENABLED(CONFIG_NVRAM)
	546	#ifdef CONFIG_MAC
	547	static unsigned char m68k_nvram_read_byte(int addr)
	548	{
	549	if (MACH_IS_MAC)
	550	return mac_pram_read_byte(addr);
	551	return 0xff;
	552	}
	553
	554	static void m68k_nvram_write_byte(unsigned char val, int addr)
	555	{
	556	if (MACH_IS_MAC)
	557	mac_pram_write_byte(val, addr);
	558	}
	559	#endif /* CONFIG_MAC */
	560
	561	#ifdef CONFIG_ATARI
	562	static ssize_t m68k_nvram_read(char buf, size_t count, loff_t ppos)
	563	{
	564	if (MACH_IS_ATARI)
	565	return atari_nvram_read(buf, count, ppos);
	566	else if (MACH_IS_MAC)
	567	return nvram_read_bytes(buf, count, ppos);
	568	return -EINVAL;
	569	}
	570
	571	static ssize_t m68k_nvram_write(char buf, size_t count, loff_t ppos)
	572	{
	573	if (MACH_IS_ATARI)
	574	return atari_nvram_write(buf, count, ppos);
	575	else if (MACH_IS_MAC)
	576	return nvram_write_bytes(buf, count, ppos);
	577	return -EINVAL;
	578	}
	579
	580	static long m68k_nvram_set_checksum(void)
	581	{
	582	if (MACH_IS_ATARI)
	583	return atari_nvram_set_checksum();
	584	return -EINVAL;
	585	}
	586
	587	static long m68k_nvram_initialize(void)
	588	{
	589	if (MACH_IS_ATARI)
	590	return atari_nvram_initialize();
	591	return -EINVAL;
	592	}
	593	#endif /* CONFIG_ATARI */
	594
	595	static ssize_t m68k_nvram_get_size(void)
	596	{
	597	if (MACH_IS_ATARI)
	598	return atari_nvram_get_size();
	599	else if (MACH_IS_MAC)
	600	return mac_pram_get_size();
	601	return -ENODEV;
	602	}
	603
	604	/* Atari device drivers call .read (to get checksum validation) whereas
	605	* Mac and PowerMac device drivers just use .read_byte.
	606	*/
	607	const struct nvram_ops arch_nvram_ops = {
608	#ifdef CONFIG_MAC
609	.read_byte = m68k_nvram_read_byte,
610	.write_byte = m68k_nvram_write_byte,
611	#endif
612	#ifdef CONFIG_ATARI
613	.read = m68k_nvram_read,
614	.write = m68k_nvram_write,
615	.set_checksum = m68k_nvram_set_checksum,
616	.initialize = m68k_nvram_initialize,
617	#endif
618	.get_size = m68k_nvram_get_size,
619	};
620	EXPORT_SYMBOL(arch_nvram_ops);
621	#endif /* CONFIG_NVRAM */