[linux-block.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/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>
#include <asm/config.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

#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 if (MACH_IS_VIRT)
				unknown = virt_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
#ifdef CONFIG_VIRT
	case MACH_VIRT:
		config_virt();
		break;
#endif
	default:
		panic("No configuration setup");
	}

#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

	paging_init();

#ifdef CONFIG_NATFEAT
	nf_init();
#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

/* 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>
66d857b0 GU	19	#include <linux/errno.h>
	20	#include <linux/string.h>
	21	#include <linux/init.h>
1008a115	22	#include <linux/memblock.h>
66d857b0 GU	23	#include <linux/proc_fs.h>
	24	#include <linux/seq_file.h>
	25	#include <linux/module.h>
d3b41b6b	26	#include <linux/nvram.h>
66d857b0 GU	27	#include <linux/initrd.h>
	28
	29	#include <asm/bootinfo.h>
abe48101	30	#include <asm/byteorder.h>
66d857b0 GU	31	#include <asm/sections.h>
	32	#include <asm/setup.h>
	33	#include <asm/fpu.h>
	34	#include <asm/irq.h>
	35	#include <asm/io.h>
	36	#include <asm/machdep.h>
	37	#ifdef CONFIG_AMIGA
	38	#include <asm/amigahw.h>
	39	#endif
66d857b0	40	#include <asm/atarihw.h>
d3b41b6b	41	#ifdef CONFIG_ATARI
66d857b0 GU	42	#include <asm/atari_stram.h>
	43	#endif
	44	#ifdef CONFIG_SUN3X
	45	#include <asm/dvma.h>
	46	#endif
d3b41b6b	47	#include <asm/macintosh.h>
66d857b0	48	#include <asm/natfeat.h>
91d7b75a	49	#include <asm/config.h>
66d857b0 GU	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
66d857b0 GU	116	#define MASK_256K 0xfffc0000
	117
	118	extern void paging_init(void);
	119
	120	static void __init m68k_parse_bootinfo(const struct bi_record *record)
	121	{
abe48101 GU	122	uint16_t tag;
abe48101 GU	123
7bc1e4d8 GU	124	save_bootinfo(record);
7bc1e4d8 GU	125
abe48101	126	while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
66d857b0	127	int unknown = 0;
abe48101 GU	128	const void *data = record->data;
abe48101 GU	129	uint16_t size = be16_to_cpu(record->size);
66d857b0	130
abe48101	131	switch (tag) {
66d857b0 GU	132	case BI_MACHTYPE:
	133	case BI_CPUTYPE:
	134	case BI_FPUTYPE:
	135	case BI_MMUTYPE:
	136	/* Already set up by head.S */
	137	break;
	138
	139	case BI_MEMCHUNK:
	140	if (m68k_num_memory < NUM_MEMINFO) {
abe48101 GU	141	const struct mem_info *m = data;
	142	m68k_memory[m68k_num_memory].addr =
	143	be32_to_cpu(m->addr);
	144	m68k_memory[m68k_num_memory].size =
	145	be32_to_cpu(m->size);
66d857b0 GU	146	m68k_num_memory++;
66d857b0 GU	147	} else
6074a139 GU	148	pr_warn("%s: too many memory chunks\n",
6074a139 GU	149	__func__);
66d857b0 GU	150	break;
	151
	152	case BI_RAMDISK:
abe48101 GU	153	{
	154	const struct mem_info *m = data;
	155	m68k_ramdisk.addr = be32_to_cpu(m->addr);
	156	m68k_ramdisk.size = be32_to_cpu(m->size);
	157	}
66d857b0 GU	158	break;
	159
	160	case BI_COMMAND_LINE:
abe48101	161	strlcpy(m68k_command_line, data,
66d857b0 GU	162	sizeof(m68k_command_line));
	163	break;
	164
	165	default:
	166	if (MACH_IS_AMIGA)
	167	unknown = amiga_parse_bootinfo(record);
	168	else if (MACH_IS_ATARI)
	169	unknown = atari_parse_bootinfo(record);
	170	else if (MACH_IS_MAC)
	171	unknown = mac_parse_bootinfo(record);
	172	else if (MACH_IS_Q40)
	173	unknown = q40_parse_bootinfo(record);
	174	else if (MACH_IS_BVME6000)
	175	unknown = bvme6000_parse_bootinfo(record);
	176	else if (MACH_IS_MVME16x)
	177	unknown = mvme16x_parse_bootinfo(record);
	178	else if (MACH_IS_MVME147)
	179	unknown = mvme147_parse_bootinfo(record);
	180	else if (MACH_IS_HP300)
	181	unknown = hp300_parse_bootinfo(record);
	182	else if (MACH_IS_APOLLO)
	183	unknown = apollo_parse_bootinfo(record);
05d51e42 LV	184	else if (MACH_IS_VIRT)
05d51e42 LV	185	unknown = virt_parse_bootinfo(record);
66d857b0 GU	186	else
	187	unknown = 1;
	188	}
	189	if (unknown)
6074a139	190	pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
abe48101 GU	191	tag);
abe48101 GU	192	record = (struct bi_record *)((unsigned long)record + size);
66d857b0 GU	193	}
	194
	195	m68k_realnum_memory = m68k_num_memory;
	196	#ifdef CONFIG_SINGLE_MEMORY_CHUNK
	197	if (m68k_num_memory > 1) {
6074a139 GU	198	pr_warn("%s: ignoring last %i chunks of physical memory\n",
6074a139 GU	199	__func__, (m68k_num_memory - 1));
66d857b0 GU	200	m68k_num_memory = 1;
	201	}
	202	#endif
	203	}
	204
	205	void __init setup_arch(char **cmdline_p)
	206	{
29a20203	207	/* The bootinfo is located right after the kernel */
37314540 GU	208	if (!CPU_IS_COLDFIRE)
37314540 GU	209	m68k_parse_bootinfo((const struct bi_record *)_end);
66d857b0 GU	210
	211	if (CPU_IS_040)
	212	m68k_is040or060 = 4;
	213	else if (CPU_IS_060)
	214	m68k_is040or060 = 6;
	215
	216	/* FIXME: m68k_fputype is passed in by Penguin booter, which can
	217	* be confused by software FPU emulation. BEWARE.
	218	* We should really do our own FPU check at startup.
	219	* [what do we do with buggy 68LC040s? if we have problems
	220	* with them, we should add a test to check_bugs() below] */
6d3ec805	221	#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
66d857b0	222	/* clear the fpu if we have one */
0a2796da	223	if (m68k_fputype & (FPU_68881\|FPU_68882\|FPU_68040\|FPU_68060\|FPU_COLDFIRE)) {
66d857b0 GU	224	volatile int zero = 0;
	225	asm volatile ("frestore %0" : : "m" (zero));
	226	}
	227	#endif
	228
	229	if (CPU_IS_060) {
	230	u32 pcr;
	231
	232	asm (".chip 68060; movec %%pcr,%0; .chip 68k"
	233	: "=d" (pcr));
	234	if (((pcr >> 8) & 0xff) <= 5) {
6074a139	235	pr_warn("Enabling workaround for errata I14\n");
66d857b0 GU	236	asm (".chip 68060; movec %0,%%pcr; .chip 68k"
	237	: : "d" (pcr \| 0x20));
	238	}
	239	}
	240
ed408db1	241	setup_initial_init_mm((void *)PAGE_OFFSET, _etext, _edata, _end);
66d857b0	242
d1db9120 GU	243	#if defined(CONFIG_BOOTPARAM)
	244	strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
	245	m68k_command_line[CL_SIZE - 1] = 0;
	246	#endif /* CONFIG_BOOTPARAM */
aa5ac789	247	process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
66d857b0 GU	248	*cmdline_p = m68k_command_line;
	249	memcpy(boot_command_line, *cmdline_p, CL_SIZE);
	250
	251	parse_early_param();
	252
66d857b0 GU	253	switch (m68k_machtype) {
	254	#ifdef CONFIG_AMIGA
	255	case MACH_AMIGA:
	256	config_amiga();
	257	break;
	258	#endif
	259	#ifdef CONFIG_ATARI
	260	case MACH_ATARI:
	261	config_atari();
	262	break;
	263	#endif
	264	#ifdef CONFIG_MAC
	265	case MACH_MAC:
	266	config_mac();
	267	break;
	268	#endif
	269	#ifdef CONFIG_SUN3
	270	case MACH_SUN3:
	271	config_sun3();
	272	break;
	273	#endif
	274	#ifdef CONFIG_APOLLO
	275	case MACH_APOLLO:
	276	config_apollo();
	277	break;
	278	#endif
	279	#ifdef CONFIG_MVME147
	280	case MACH_MVME147:
	281	config_mvme147();
	282	break;
	283	#endif
	284	#ifdef CONFIG_MVME16x
	285	case MACH_MVME16x:
	286	config_mvme16x();
	287	break;
	288	#endif
	289	#ifdef CONFIG_BVME6000
	290	case MACH_BVME6000:
	291	config_bvme6000();
	292	break;
	293	#endif
	294	#ifdef CONFIG_HP300
	295	case MACH_HP300:
	296	config_hp300();
	297	break;
	298	#endif
	299	#ifdef CONFIG_Q40
	300	case MACH_Q40:
	301	config_q40();
	302	break;
	303	#endif
	304	#ifdef CONFIG_SUN3X
	305	case MACH_SUN3X:
	306	config_sun3x();
	307	break;
37314540 GU	308	#endif
	309	#ifdef CONFIG_COLDFIRE
	310	case MACH_M54XX:
81d33350	311	case MACH_M5441X:
34fa9b21 GU	312	cf_bootmem_alloc();
34fa9b21 GU	313	cf_mmu_context_init();
37314540 GU	314	config_BSP(NULL, 0);
37314540 GU	315	break;
05d51e42 LV	316	#endif
	317	#ifdef CONFIG_VIRT
	318	case MACH_VIRT:
	319	config_virt();
	320	break;
66d857b0 GU	321	#endif
	322	default:
	323	panic("No configuration setup");
	324	}
	325
66d857b0 GU	326	#ifdef CONFIG_BLK_DEV_INITRD
66d857b0 GU	327	if (m68k_ramdisk.size) {
1008a115	328	memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
66d857b0 GU	329	initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
66d857b0 GU	330	initrd_end = initrd_start + m68k_ramdisk.size;
6074a139	331	pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
66d857b0 GU	332	}
	333	#endif
	334
376e3fde FT	335	paging_init();
	336
	337	#ifdef CONFIG_NATFEAT
	338	nf_init();
	339	#endif
	340
66d857b0 GU	341	#ifdef CONFIG_ATARI
	342	if (MACH_IS_ATARI)
	343	atari_stram_reserve_pages((void *)availmem);
	344	#endif
	345	#ifdef CONFIG_SUN3X
	346	if (MACH_IS_SUN3X) {
	347	dvma_init();
	348	}
	349	#endif
	350
66d857b0 GU	351	/* set ISA defs early as possible */
	352	#if defined(CONFIG_ISA) && defined(MULTI_ISA)
	353	if (MACH_IS_Q40) {
	354	isa_type = ISA_TYPE_Q40;
	355	isa_sex = 0;
	356	}
	357	#ifdef CONFIG_AMIGA_PCMCIA
	358	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
	359	isa_type = ISA_TYPE_AG;
	360	isa_sex = 1;
	361	}
	362	#endif
84b16b7b MS	363	#ifdef CONFIG_ATARI_ROM_ISA
	364	if (MACH_IS_ATARI) {
	365	isa_type = ISA_TYPE_ENEC;
	366	isa_sex = 0;
	367	}
	368	#endif
66d857b0 GU	369	#endif
	370	}
	371
	372	static int show_cpuinfo(struct seq_file m, void v)
	373	{
	374	const char cpu, mmu, *fpu;
	375	unsigned long clockfreq, clockfactor;
	376
	377	#define LOOP_CYCLES_68020 (8)
	378	#define LOOP_CYCLES_68030 (8)
	379	#define LOOP_CYCLES_68040 (3)
	380	#define LOOP_CYCLES_68060 (1)
060632ad	381	#define LOOP_CYCLES_COLDFIRE (2)
66d857b0 GU	382
	383	if (CPU_IS_020) {
	384	cpu = "68020";
	385	clockfactor = LOOP_CYCLES_68020;
	386	} else if (CPU_IS_030) {
	387	cpu = "68030";
	388	clockfactor = LOOP_CYCLES_68030;
	389	} else if (CPU_IS_040) {
	390	cpu = "68040";
	391	clockfactor = LOOP_CYCLES_68040;
	392	} else if (CPU_IS_060) {
	393	cpu = "68060";
	394	clockfactor = LOOP_CYCLES_68060;
060632ad GU	395	} else if (CPU_IS_COLDFIRE) {
	396	cpu = "ColdFire";
	397	clockfactor = LOOP_CYCLES_COLDFIRE;
66d857b0 GU	398	} else {
	399	cpu = "680x0";
	400	clockfactor = 0;
	401	}
	402
	403	#ifdef CONFIG_M68KFPU_EMU_ONLY
	404	fpu = "none(soft float)";
	405	#else
	406	if (m68k_fputype & FPU_68881)
	407	fpu = "68881";
	408	else if (m68k_fputype & FPU_68882)
	409	fpu = "68882";
	410	else if (m68k_fputype & FPU_68040)
	411	fpu = "68040";
	412	else if (m68k_fputype & FPU_68060)
	413	fpu = "68060";
	414	else if (m68k_fputype & FPU_SUNFPA)
	415	fpu = "Sun FPA";
060632ad GU	416	else if (m68k_fputype & FPU_COLDFIRE)
060632ad GU	417	fpu = "ColdFire";
66d857b0 GU	418	else
	419	fpu = "none";
	420	#endif
	421
	422	if (m68k_mmutype & MMU_68851)
	423	mmu = "68851";
	424	else if (m68k_mmutype & MMU_68030)
	425	mmu = "68030";
	426	else if (m68k_mmutype & MMU_68040)
	427	mmu = "68040";
	428	else if (m68k_mmutype & MMU_68060)
	429	mmu = "68060";
	430	else if (m68k_mmutype & MMU_SUN3)
	431	mmu = "Sun-3";
	432	else if (m68k_mmutype & MMU_APOLLO)
	433	mmu = "Apollo";
060632ad GU	434	else if (m68k_mmutype & MMU_COLDFIRE)
060632ad GU	435	mmu = "ColdFire";
66d857b0 GU	436	else
	437	mmu = "unknown";
	438
	439	clockfreq = loops_per_jiffy * HZ * clockfactor;
	440
	441	seq_printf(m, "CPU:\t\t%s\n"
	442	"MMU:\t\t%s\n"
	443	"FPU:\t\t%s\n"
	444	"Clocking:\t%lu.%1luMHz\n"
	445	"BogoMips:\t%lu.%02lu\n"
	446	"Calibration:\t%lu loops\n",
	447	cpu, mmu, fpu,
	448	clockfreq/1000000,(clockfreq/100000)%10,
	449	loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
	450	loops_per_jiffy);
	451	return 0;
	452	}
	453
	454	static void c_start(struct seq_file m, loff_t *pos)
	455	{
	456	return pos < 1 ? (void )1 : NULL;
	457	}
	458	static void c_next(struct seq_file m, void v, loff_t pos)
	459	{
	460	++*pos;
	461	return NULL;
	462	}
	463	static void c_stop(struct seq_file m, void v)
	464	{
	465	}
	466	const struct seq_operations cpuinfo_op = {
	467	.start = c_start,
	468	.next = c_next,
	469	.stop = c_stop,
	470	.show = show_cpuinfo,
	471	};
	472
	473	#ifdef CONFIG_PROC_HARDWARE
	474	static int hardware_proc_show(struct seq_file m, void v)
	475	{
	476	char model[80];
	477	unsigned long mem;
	478	int i;
	479
	480	if (mach_get_model)
	481	mach_get_model(model);
	482	else
	483	strcpy(model, "Unknown m68k");
	484
	485	seq_printf(m, "Model:\t\t%s\n", model);
	486	for (mem = 0, i = 0; i < m68k_num_memory; i++)
	487	mem += m68k_memory[i].size;
	488	seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
	489
	490	if (mach_get_hardware_list)
	491	mach_get_hardware_list(m);
	492
	493	return 0;
	494	}
	495
66d857b0 GU	496	static int __init proc_hardware_init(void)
66d857b0 GU	497	{
3f3942ac	498	proc_create_single("hardware", 0, NULL, hardware_proc_show);
66d857b0 GU	499	return 0;
	500	}
	501	module_init(proc_hardware_init);
	502	#endif
	503
	504	void check_bugs(void)
	505	{
2a744007	506	#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
66d857b0	507	if (m68k_fputype == 0) {
6074a139	508	pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
66d857b0	509	"WHICH IS REQUIRED BY LINUX/M68K ***\n");
6074a139	510	pr_emerg("Upgrade your hardware or join the FPU "
66d857b0 GU	511	"emulation project\n");
	512	panic("no FPU");
	513	}
	514	#endif /* !CONFIG_M68KFPU_EMU */
	515	}
	516
	517	#ifdef CONFIG_ADB
	518	static int __init adb_probe_sync_enable (char *str) {
	519	extern int __adb_probe_sync;
	520	__adb_probe_sync = 1;
	521	return 1;
	522	}
	523
	524	__setup("adb_sync", adb_probe_sync_enable);
	525	#endif /* CONFIG_ADB */
d3b41b6b FT	526
	527	#if IS_ENABLED(CONFIG_NVRAM)
	528	#ifdef CONFIG_MAC
	529	static unsigned char m68k_nvram_read_byte(int addr)
	530	{
	531	if (MACH_IS_MAC)
	532	return mac_pram_read_byte(addr);
	533	return 0xff;
	534	}
	535
	536	static void m68k_nvram_write_byte(unsigned char val, int addr)
	537	{
	538	if (MACH_IS_MAC)
	539	mac_pram_write_byte(val, addr);
	540	}
	541	#endif /* CONFIG_MAC */
	542
	543	#ifdef CONFIG_ATARI
	544	static ssize_t m68k_nvram_read(char buf, size_t count, loff_t ppos)
	545	{
	546	if (MACH_IS_ATARI)
	547	return atari_nvram_read(buf, count, ppos);
	548	else if (MACH_IS_MAC)
	549	return nvram_read_bytes(buf, count, ppos);
	550	return -EINVAL;
	551	}
	552
	553	static ssize_t m68k_nvram_write(char buf, size_t count, loff_t ppos)
	554	{
	555	if (MACH_IS_ATARI)
	556	return atari_nvram_write(buf, count, ppos);
	557	else if (MACH_IS_MAC)
	558	return nvram_write_bytes(buf, count, ppos);
	559	return -EINVAL;
	560	}
	561
	562	static long m68k_nvram_set_checksum(void)
	563	{
	564	if (MACH_IS_ATARI)
	565	return atari_nvram_set_checksum();
	566	return -EINVAL;
	567	}
	568
	569	static long m68k_nvram_initialize(void)
	570	{
	571	if (MACH_IS_ATARI)
	572	return atari_nvram_initialize();
	573	return -EINVAL;
	574	}
	575	#endif /* CONFIG_ATARI */
	576
	577	static ssize_t m68k_nvram_get_size(void)
	578	{
	579	if (MACH_IS_ATARI)
	580	return atari_nvram_get_size();
	581	else if (MACH_IS_MAC)
	582	return mac_pram_get_size();
	583	return -ENODEV;
	584	}
	585
	586	/* Atari device drivers call .read (to get checksum validation) whereas
	587	* Mac and PowerMac device drivers just use .read_byte.
	588	*/
	589	const struct nvram_ops arch_nvram_ops = {
590	#ifdef CONFIG_MAC
591	.read_byte = m68k_nvram_read_byte,
592	.write_byte = m68k_nvram_write_byte,
593	#endif
594	#ifdef CONFIG_ATARI
595	.read = m68k_nvram_read,
596	.write = m68k_nvram_write,
597	.set_checksum = m68k_nvram_set_checksum,
598	.initialize = m68k_nvram_initialize,
599	#endif
600	.get_size = m68k_nvram_get_size,
601	};
602	EXPORT_SYMBOL(arch_nvram_ops);
603	#endif /* CONFIG_NVRAM */