[deliverable/linux.git] / arch / h8300 / kernel / setup.c

/*
 *  linux/arch/h8300/kernel/setup.c
 *
 *  Copyleft  ()) 2000       James D. Schettine {james@telos-systems.com}
 *  Copyright (C) 1999,2000  Greg Ungerer (gerg@snapgear.com)
 *  Copyright (C) 1998,1999  D. Jeff Dionne <jeff@lineo.ca>
 *  Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>
 *  Copyright (C) 1995       Hamish Macdonald
 *  Copyright (C) 2000       Lineo Inc. (www.lineo.com) 
 *  Copyright (C) 2001 	     Lineo, Inc. <www.lineo.com>
 *
 *  H8/300 porting Yoshinori Sato <ysato@users.sourceforge.jp>
 */

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

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

#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/pgtable.h>

#if defined(__H8300H__)
#define CPU "H8/300H"
#include <asm/regs306x.h>
#endif

#if defined(__H8300S__)
#define CPU "H8S"
#include <asm/regs267x.h>
#endif

#define STUBSIZE 0xc000

unsigned long rom_length;
unsigned long memory_start;
unsigned long memory_end;

char __initdata command_line[COMMAND_LINE_SIZE];

extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
extern int _ramstart, _ramend;
extern char _target_name[];
extern void h8300_gpio_init(void);

#if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) \
    && defined(CONFIG_GDB_MAGICPRINT)
/* printk with gdb service */
static void gdb_console_output(struct console *c, const char *msg, unsigned len)
{
	for (; len > 0; len--) {
		asm("mov.w %0,r2\n\t"
                    "jsr @0xc4"::"r"(*msg++):"er2");
	}
}

/*
 *	Setup initial baud/bits/parity. We do two things here:
 *	- construct a cflag setting for the first rs_open()
 *	- initialize the serial port
 *	Return non-zero if we didn't find a serial port.
 */
static int __init gdb_console_setup(struct console *co, char *options)
{
	return 0;
}

static const struct console gdb_console = {
	.name		= "gdb_con",
	.write		= gdb_console_output,
	.device		= NULL,
	.setup		= gdb_console_setup,
	.flags		= CON_PRINTBUFFER,
	.index		= -1,
};
#endif

void __init setup_arch(char **cmdline_p)
{
	int bootmap_size;

	memory_start = (unsigned long) &_ramstart;

	/* allow for ROMFS on the end of the kernel */
	if (memcmp((void *)memory_start, "-rom1fs-", 8) == 0) {
#if defined(CONFIG_BLK_DEV_INITRD)
		initrd_start = memory_start;
		initrd_end = memory_start += be32_to_cpu(((unsigned long *) (memory_start))[2]);
#else
		memory_start += be32_to_cpu(((unsigned long *) memory_start)[2]);
#endif
	}
	memory_start = PAGE_ALIGN(memory_start);
#if !defined(CONFIG_BLKDEV_RESERVE)
	memory_end = (unsigned long) &_ramend; /* by now the stack is part of the init task */
#if defined(CONFIG_GDB_DEBUG)
	memory_end -= STUBSIZE;
#endif
#else
	if ((memory_end < CONFIG_BLKDEV_RESERVE_ADDRESS) && 
	    (memory_end > CONFIG_BLKDEV_RESERVE_ADDRESS))
	    /* overlap userarea */
	    memory_end = CONFIG_BLKDEV_RESERVE_ADDRESS; 
#endif

	init_mm.start_code = (unsigned long) &_stext;
	init_mm.end_code = (unsigned long) &_etext;
	init_mm.end_data = (unsigned long) &_edata;
	init_mm.brk = (unsigned long) 0; 

#if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) && defined(CONFIG_GDB_MAGICPRINT)
	register_console((struct console *)&gdb_console);
#endif

	printk(KERN_INFO "\r\n\nuClinux " CPU "\n");
	printk(KERN_INFO "Target Hardware: %s\n",_target_name);
	printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
	printk(KERN_INFO "H8/300 series support by Yoshinori Sato <ysato@users.sourceforge.jp>\n");

#ifdef DEBUG
	printk(KERN_DEBUG "KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
		"BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
		(int) &_sdata, (int) &_edata,
		(int) &_sbss, (int) &_ebss);
	printk(KERN_DEBUG "KERNEL -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x "
		"STACK=0x%06x-0x%06x\n",
	       (int) &_ebss, (int) memory_start,
		(int) memory_start, (int) memory_end,
		(int) memory_end, (int) &_ramend);
#endif

#ifdef CONFIG_DEFAULT_CMDLINE
	/* set from default command line */
	if (*command_line == '\0')
		strcpy(command_line,CONFIG_KERNEL_COMMAND);
#endif
	/* Keep a copy of command line */
	*cmdline_p = &command_line[0];
	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
	boot_command_line[COMMAND_LINE_SIZE-1] = 0;

#ifdef DEBUG
	if (strlen(*cmdline_p)) 
		printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p);
#endif

	/*
	 * give all the memory to the bootmap allocator,  tell it to put the
	 * boot mem_map at the start of memory
	 */
	bootmap_size = init_bootmem_node(
			NODE_DATA(0),
			memory_start >> PAGE_SHIFT, /* map goes here */
			PAGE_OFFSET >> PAGE_SHIFT,	/* 0 on coldfire */
			memory_end >> PAGE_SHIFT);
	/*
	 * free the usable memory,  we have to make sure we do not free
	 * the bootmem bitmap so we then reserve it after freeing it :-)
	 */
	free_bootmem(memory_start, memory_end - memory_start);
	reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
	/*
	 * get kmalloc into gear
	 */
	paging_init();
	h8300_gpio_init();
#if defined(CONFIG_H8300_AKI3068NET) && defined(CONFIG_IDE)
	{
#define AREABIT(addr) (1 << (((addr) >> 21) & 7))
		/* setup BSC */
		volatile unsigned char *abwcr = (volatile unsigned char *)ABWCR;
		volatile unsigned char *cscr = (volatile unsigned char *)CSCR;
		*abwcr &= ~(AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT));
		*cscr  |= (AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT)) | 0x0f;
	}
#endif
#ifdef DEBUG
	printk(KERN_DEBUG "Done setup_arch\n");
#endif
}

/*
 *	Get CPU information for use by the procfs.
 */

static int show_cpuinfo(struct seq_file *m, void *v)
{
    char *cpu;
    int mode;
    u_long clockfreq;

    cpu = CPU;
    mode = *(volatile unsigned char *)MDCR & 0x07;

    clockfreq = CONFIG_CPU_CLOCK;

    seq_printf(m,  "CPU:\t\t%s (mode:%d)\n"
		   "Clock:\t\t%lu.%1luMHz\n"
		   "BogoMips:\t%lu.%02lu\n"
		   "Calibration:\t%lu loops\n",
	           cpu,mode,
		   clockfreq/1000,clockfreq%1000,
		   (loops_per_jiffy*HZ)/500000,((loops_per_jiffy*HZ)/5000)%100,
		   (loops_per_jiffy*HZ));

    return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
	return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
}

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
	++*pos;
	return c_start(m, pos);
}

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,
};
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/h8300/kernel/setup.c
	3	*
	4	* Copyleft ()) 2000 James D. Schettine {james@telos-systems.com}
	5	* Copyright (C) 1999,2000 Greg Ungerer (gerg@snapgear.com)
	6	* Copyright (C) 1998,1999 D. Jeff Dionne <jeff@lineo.ca>
	7	* Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
	8	* Copyright (C) 1995 Hamish Macdonald
	9	* Copyright (C) 2000 Lineo Inc. (www.lineo.com)
	10	* Copyright (C) 2001 Lineo, Inc. <www.lineo.com>
	11	*
	12	* H8/300 porting Yoshinori Sato <ysato@users.sourceforge.jp>
	13	*/
	14
	15	/*
	16	* This file handles the architecture-dependent parts of system setup
	17	*/
	18
1da177e4 LT	19	#include <linux/kernel.h>
	20	#include <linux/sched.h>
	21	#include <linux/delay.h>
	22	#include <linux/interrupt.h>
27ac792c	23	#include <linux/mm.h>
1da177e4 LT	24	#include <linux/fs.h>
	25	#include <linux/fb.h>
	26	#include <linux/console.h>
	27	#include <linux/genhd.h>
	28	#include <linux/errno.h>
	29	#include <linux/string.h>
	30	#include <linux/major.h>
	31	#include <linux/bootmem.h>
	32	#include <linux/seq_file.h>
	33	#include <linux/init.h>
	34
	35	#include <asm/setup.h>
	36	#include <asm/irq.h>
1da177e4	37	#include <asm/pgtable.h>
1da177e4 LT	38
	39	#if defined(__H8300H__)
	40	#define CPU "H8/300H"
	41	#include <asm/regs306x.h>
	42	#endif
	43
	44	#if defined(__H8300S__)
	45	#define CPU "H8S"
	46	#include <asm/regs267x.h>
	47	#endif
	48
497888cf	49	#define STUBSIZE 0xc000
1da177e4 LT	50
	51	unsigned long rom_length;
	52	unsigned long memory_start;
	53	unsigned long memory_end;
	54
5ff62590	55	char __initdata command_line[COMMAND_LINE_SIZE];
1da177e4 LT	56
	57	extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
	58	extern int _ramstart, _ramend;
	59	extern char _target_name[];
	60	extern void h8300_gpio_init(void);
	61
	62	#if (defined(CONFIG_H8300H_SIM) \|\| defined(CONFIG_H8S_SIM)) \
	63	&& defined(CONFIG_GDB_MAGICPRINT)
	64	/* printk with gdb service */
	65	static void gdb_console_output(struct console c, const char msg, unsigned len)
	66	{
	67	for (; len > 0; len--) {
	68	asm("mov.w %0,r2\n\t"
	69	"jsr @0xc4"::"r"(*msg++):"er2");
	70	}
	71	}
	72
	73	/*
	74	* Setup initial baud/bits/parity. We do two things here:
	75	* - construct a cflag setting for the first rs_open()
	76	* - initialize the serial port
	77	* Return non-zero if we didn't find a serial port.
	78	*/
	79	static int __init gdb_console_setup(struct console co, char options)
	80	{
	81	return 0;
	82	}
	83
	84	static const struct console gdb_console = {
	85	.name = "gdb_con",
	86	.write = gdb_console_output,
	87	.device = NULL,
	88	.setup = gdb_console_setup,
	89	.flags = CON_PRINTBUFFER,
	90	.index = -1,
	91	};
	92	#endif
	93
	94	void __init setup_arch(char **cmdline_p)
	95	{
	96	int bootmap_size;
	97
	98	memory_start = (unsigned long) &_ramstart;
	99
	100	/* allow for ROMFS on the end of the kernel */
	101	if (memcmp((void *)memory_start, "-rom1fs-", 8) == 0) {
	102	#if defined(CONFIG_BLK_DEV_INITRD)
	103	initrd_start = memory_start;
	104	initrd_end = memory_start += be32_to_cpu(((unsigned long *) (memory_start))[2]);
	105	#else
	106	memory_start += be32_to_cpu(((unsigned long *) memory_start)[2]);
	107	#endif
	108	}
	109	memory_start = PAGE_ALIGN(memory_start);
	110	#if !defined(CONFIG_BLKDEV_RESERVE)
	111	memory_end = (unsigned long) &_ramend; /* by now the stack is part of the init task */
	112	#if defined(CONFIG_GDB_DEBUG)
	113	memory_end -= STUBSIZE;
	114	#endif
	115	#else
	116	if ((memory_end < CONFIG_BLKDEV_RESERVE_ADDRESS) &&
3869aa29	117	(memory_end > CONFIG_BLKDEV_RESERVE_ADDRESS))
1da177e4 LT	118	/* overlap userarea */
	119	memory_end = CONFIG_BLKDEV_RESERVE_ADDRESS;
	120	#endif
	121
	122	init_mm.start_code = (unsigned long) &_stext;
	123	init_mm.end_code = (unsigned long) &_etext;
	124	init_mm.end_data = (unsigned long) &_edata;
	125	init_mm.brk = (unsigned long) 0;
	126
	127	#if (defined(CONFIG_H8300H_SIM) \|\| defined(CONFIG_H8S_SIM)) && defined(CONFIG_GDB_MAGICPRINT)
	128	register_console((struct console *)&gdb_console);
	129	#endif
	130
	131	printk(KERN_INFO "\r\n\nuClinux " CPU "\n");
	132	printk(KERN_INFO "Target Hardware: %s\n",_target_name);
	133	printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
	134	printk(KERN_INFO "H8/300 series support by Yoshinori Sato <ysato@users.sourceforge.jp>\n");
	135
	136	#ifdef DEBUG
	137	printk(KERN_DEBUG "KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
	138	"BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
	139	(int) &_sdata, (int) &_edata,
	140	(int) &_sbss, (int) &_ebss);
	141	printk(KERN_DEBUG "KERNEL -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x "
	142	"STACK=0x%06x-0x%06x\n",
	143	(int) &_ebss, (int) memory_start,
	144	(int) memory_start, (int) memory_end,
	145	(int) memory_end, (int) &_ramend);
	146	#endif
	147
	148	#ifdef CONFIG_DEFAULT_CMDLINE
	149	/* set from default command line */
	150	if (*command_line == '\0')
	151	strcpy(command_line,CONFIG_KERNEL_COMMAND);
	152	#endif
	153	/* Keep a copy of command line */
	154	*cmdline_p = &command_line[0];
5ff62590 ABL	155	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
5ff62590 ABL	156	boot_command_line[COMMAND_LINE_SIZE-1] = 0;
1da177e4 LT	157
	158	#ifdef DEBUG
	159	if (strlen(*cmdline_p))
	160	printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p);
	161	#endif
	162
	163	/*
	164	* give all the memory to the bootmap allocator, tell it to put the
	165	* boot mem_map at the start of memory
	166	*/
	167	bootmap_size = init_bootmem_node(
	168	NODE_DATA(0),
	169	memory_start >> PAGE_SHIFT, /* map goes here */
	170	PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */
	171	memory_end >> PAGE_SHIFT);
	172	/*
	173	* free the usable memory, we have to make sure we do not free
	174	* the bootmem bitmap so we then reserve it after freeing it :-)
	175	*/
	176	free_bootmem(memory_start, memory_end - memory_start);
72a7fe39	177	reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
1da177e4 LT	178	/*
	179	* get kmalloc into gear
	180	*/
	181	paging_init();
	182	h8300_gpio_init();
	183	#if defined(CONFIG_H8300_AKI3068NET) && defined(CONFIG_IDE)
	184	{
	185	#define AREABIT(addr) (1 << (((addr) >> 21) & 7))
	186	/* setup BSC */
	187	volatile unsigned char abwcr = (volatile unsigned char )ABWCR;
	188	volatile unsigned char cscr = (volatile unsigned char )CSCR;
	189	*abwcr &= ~(AREABIT(CONFIG_H8300_IDE_BASE) \| AREABIT(CONFIG_H8300_IDE_ALT));
	190	*cscr \|= (AREABIT(CONFIG_H8300_IDE_BASE) \| AREABIT(CONFIG_H8300_IDE_ALT)) \| 0x0f;
	191	}
	192	#endif
	193	#ifdef DEBUG
	194	printk(KERN_DEBUG "Done setup_arch\n");
	195	#endif
	196	}
	197
	198	/*
	199	* Get CPU information for use by the procfs.
	200	*/
	201
	202	static int show_cpuinfo(struct seq_file m, void v)
	203	{
	204	char *cpu;
	205	int mode;
	206	u_long clockfreq;
	207
	208	cpu = CPU;
	209	mode = (volatile unsigned char )MDCR & 0x07;
	210
	211	clockfreq = CONFIG_CPU_CLOCK;
	212
	213	seq_printf(m, "CPU:\t\t%s (mode:%d)\n"
	214	"Clock:\t\t%lu.%1luMHz\n"
	215	"BogoMips:\t%lu.%02lu\n"
	216	"Calibration:\t%lu loops\n",
	217	cpu,mode,
	218	clockfreq/1000,clockfreq%1000,
	219	(loops_per_jiffyHZ)/500000,((loops_per_jiffyHZ)/5000)%100,
	220	(loops_per_jiffy*HZ));
	221
	222	return 0;
	223	}
	224
	225	static void c_start(struct seq_file m, loff_t *pos)
	226	{
	227	return pos < NR_CPUS ? ((void ) 0x12345678) : NULL;
	228	}
	229
	230	static void c_next(struct seq_file m, void v, loff_t pos)
	231	{
	232	++*pos;
	233	return c_start(m, pos);
	234	}
	235
	236	static void c_stop(struct seq_file m, void v)
	237	{
	238	}
	239
03a44825	240	const struct seq_operations cpuinfo_op = {
1da177e4 LT	241	.start = c_start,
	242	.next = c_next,
	243	.stop = c_stop,
	244	.show = show_cpuinfo,
	245	};