/* *  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/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> #ifdef CONFIG_BLK_DEV_INITRD#include <asm/pgtable.h>#endif #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);	/*	 * 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){} struct seq_operations cpuinfo_op = {	.start	= c_start,	.next	= c_next,	.stop	= c_stop,	.show	= show_cpuinfo,};