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/*
 *  linux/arch/arm/kernel/setup.c
 *
 *  Copyright (C) 1995-1998 Russell King
 *
 * This file obtains various parameters about the system that the kernel
 * is running on.
 */
 
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/malloc.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/major.h>
#include <linux/utsname.h>
#include <linux/blk.h>
 
#include <asm/segment.h>
#include <asm/system.h>
#include <asm/hardware.h>
#include <asm/pgtable.h>
#include <asm/arch/mmu.h>
#include <asm/procinfo.h>
#include <asm/io.h>
#include <asm/setup.h>
 
struct drive_info_struct { char dummy[32]; } drive_info;
struct screen_info screen_info;
struct processor processor;
 
extern const struct processor arm2_processor_functions;
extern const struct processor arm250_processor_functions;
extern const struct processor arm3_processor_functions;
extern const struct processor arm6_processor_functions;
extern const struct processor arm7_processor_functions;
extern const struct processor sa110_processor_functions;
 
struct armversions armidlist[] = {
#if defined(CONFIG_CPU_ARM2) || defined(CONFIG_CPU_ARM3)
	{ 0x41560200, 0xfffffff0, F_MEMC	, "ARM/VLSI",	"arm2"		, &arm2_processor_functions   },
	{ 0x41560250, 0xfffffff0, F_MEMC	, "ARM/VLSI",	"arm250"	, &arm250_processor_functions },
	{ 0x41560300, 0xfffffff0, F_MEMC|F_CACHE, "ARM/VLSI",	"arm3"		, &arm3_processor_functions   },
#endif
#if defined(CONFIG_CPU_ARM6) || defined(CONFIG_CPU_SA110)
	{ 0x41560600, 0xfffffff0, F_MMU|F_32BIT	, "ARM/VLSI",	"arm6"		, &arm6_processor_functions   },
	{ 0x41560610, 0xfffffff0, F_MMU|F_32BIT	, "ARM/VLSI",	"arm610"	, &arm6_processor_functions   },
	{ 0x41007000, 0xffffff00, F_MMU|F_32BIT , "ARM/VLSI",   "arm7"		, &arm7_processor_functions   },
	/* ARM710 does not follow the spec */
	{ 0x41007100, 0xfff8ff00, F_MMU|F_32BIT , "ARM/VLSI",   "arm710"	, &arm7_processor_functions   },
	{ 0x4401a100, 0xfffffff0, F_MMU|F_32BIT	, "DEC",	"sa110"		, &sa110_processor_functions  },
#endif
#if defined(CONFIG_CPU_ARM7)
	{ 0x41007000, 0xffffff00, F_32BIT , "ARM/APLIO",   "arm7"		, &arm7_processor_functions   },
#endif
 
	{ 0x00000000, 0x00000000, 0		, "***",	"*unknown*"	, NULL }
 
};
 
 
 
#ifndef CONFIG_ARCH_TRIO
 
static struct param_struct *params = (struct param_struct *) PARAMS_BASE;
#else
struct param_struct trio_params = { { {
	4096,				// page_size
	4*1024*1024/4096,	// nr_pages
	0,					// ramdisk_size	
	0,					// flags
	0,					// rootdev
 
	80,					// video_num_cols
	24,					// video_num_rows
	0,					// video_x
	0,					// video_y
	0,					// bytes_per_char_h
	0,					// bytes_per_char_v
 
	0,  // initrd_start
	0,
 
	0
}
}
};
 
static struct param_struct *params = &trio_params;
#endif
 
 
 
unsigned long arm_id;
unsigned int vram_half_sam;
int armidindex;
int ioebpresent;
int memc_ctrl_reg;
int number_ide_drives;
int number_mfm_drives;
 
extern int bytes_per_char_h;
extern int bytes_per_char_v;
extern int root_mountflags;
extern int _etext, _edata, _end;
extern unsigned long real_end_mem;
 
/*
 * ram disk
 */
#ifdef CONFIG_BLK_DEV_RAM
extern int rd_doload;		/* 1 = load ramdisk, 0 = don't load */
extern int rd_prompt;		/* 1 = prompt for ramdisk, 0 = don't prompt */
extern int rd_image_start;	/* starting block # of image */
 
static void setup_ramdisk (struct param_struct *params)
{
	rd_image_start	= params->u1.s.rd_start;
	rd_prompt	= (params->u1.s.flags & FLAG_RDPROMPT) == 0;
	rd_doload	= (params->u1.s.flags & FLAG_RDLOAD) == 0;
}
#else
#define setup_ramdisk(p)
#endif
 
/*
 * initial ram disk
 */
#ifdef CONFIG_BLK_DEV_INITRD
static void setup_initrd (struct param_struct *params, unsigned long memory_end)
{
	initrd_start = params->u1.s.initrd_start;
	initrd_end   = params->u1.s.initrd_start + params->u1.s.initrd_size;
 
	if (initrd_end > memory_end) {
		printk ("initrd extends beyond end of memory "
			"(0x%08lx > 0x%08lx) - disabling initrd\n",
			initrd_end, memory_end);
		initrd_start = 0;
	}
}
#else
#define setup_initrd(p,m)
#endif
 
static inline void check_ioeb_present(void)
{
#ifndef CONFIG_ARCH_TRIO	
	if (((*IOEB_BASE) & 15) == 5)
		armidlist[armidindex].features |= F_IOEB;
#endif
}
 
static void get_processor_type (void)
{
	for (armidindex = 0; ; armidindex ++)
		if (!((armidlist[armidindex].id ^ arm_id) &
		      armidlist[armidindex].mask))
			break;
 
	if (armidlist[armidindex].id == 0) {
#ifndef CONFIG_ARCH_TRIO
		int i;
		for (i = 0; i < 3200; i++)
			((unsigned long *)SCREEN2_BASE)[i] = 0x77113322;
#endif
 
		while (1);
	}
 
	processor = *armidlist[armidindex].proc;
}
 
#define COMMAND_LINE_SIZE 256
 
static char command_line[COMMAND_LINE_SIZE] = { 0, };
       char saved_command_line[COMMAND_LINE_SIZE];
 
void setup_arch(char **cmdline_p,
	unsigned long * memory_start_p, unsigned long * memory_end_p)
{
	static unsigned char smptrap;
	unsigned long memory_start, memory_end;
	char c = ' ', *to = command_line, *from;
	int len = 0;
 
	if (smptrap == 1)
		return;
	smptrap = 1;
 
	get_processor_type ();
	check_ioeb_present ();
	processor._proc_init ();
 
	bytes_per_char_h  = params->u1.s.bytes_per_char_h;
	bytes_per_char_v  = params->u1.s.bytes_per_char_v;
	from		  = params->commandline;
	ROOT_DEV	  = to_kdev_t (params->u1.s.rootdev);
	ORIG_X		  = params->u1.s.video_x;
	ORIG_Y		  = params->u1.s.video_y;
	ORIG_VIDEO_COLS	  = params->u1.s.video_num_cols;
	ORIG_VIDEO_LINES  = params->u1.s.video_num_rows;
 
 
	setup_ramdisk (params);
 
	if (!(params->u1.s.flags & FLAG_READONLY))
		root_mountflags &= ~MS_RDONLY;
 
	memory_start = MAPTOPHYS((unsigned long)&_end);
	memory_end   = GET_MEMORY_END(params);
 
	init_task.mm->start_code = TASK_SIZE;
	init_task.mm->end_code	 = TASK_SIZE + (unsigned long) &_etext;
	init_task.mm->end_data	 = TASK_SIZE + (unsigned long) &_edata;
	init_task.mm->brk	 = TASK_SIZE + (unsigned long) &_end;
 
	/* Save unparsed command line copy for /proc/cmdline */
	memcpy(saved_command_line, from, COMMAND_LINE_SIZE);
	saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
 
	for (;;) {
		if (c == ' ' &&
		    from[0] == 'm' &&
		    from[1] == 'e' &&
		    from[2] == 'm' &&
		    from[3] == '=') {
			memory_end = simple_strtoul(from+4, &from, 0);
			if (*from == 'K' || *from == 'k') {
				memory_end = memory_end << 10;
				from++;
			} else if (*from == 'M' || *from == 'm') {
				memory_end = memory_end << 20;
				from++;
			}
			memory_end = memory_end + PAGE_OFFSET;
		}
		c = *from++;
		if (!c)
			break;
		if (COMMAND_LINE_SIZE <= ++len)
			break;
		*to++ = c;
	}
 
	*to = '\0';
	*cmdline_p = command_line;
	*memory_start_p = memory_start;
	*memory_end_p = memory_end;
 
	setup_initrd (params, memory_end);
 
	strcpy (system_utsname.machine, armidlist[armidindex].name);
#ifdef CONFIG_SERIAL_TRIO
	{
		extern void register_console(void (*proc)(const char *));
		extern void console_print_trio(const char * b);
		register_console(console_print_trio);
	}
#endif
 
 
}
 
#define ISSET(bit) (armidlist[armidindex].features & bit)
 
int get_cpuinfo(char * buffer)
{
	int len;
 
	len = sprintf (buffer,  "CPU:\n"
				"Type\t\t: %s\n"
				"Revision\t: %d\n"
				"Manufacturer\t: %s\n"
				"32bit modes\t: %s\n"
				"BogoMips\t: %lu.%02lu\n",
				armidlist[armidindex].name,
				(int)arm_id & 15,
				armidlist[armidindex].manu,
				ISSET (F_32BIT) ? "yes" : "no",
				(loops_per_sec+2500) / 500000,
				((loops_per_sec+2500) / 5000) % 100);
	len += sprintf (buffer + len,
				"\nHardware:\n"
				"Mem System\t: %s\n"
				"IOEB\t\t: %s\n",
				ISSET(F_MEMC)  ? "MEMC" : 
				ISSET(F_MMU)   ? "MMU"  : "*unknown*",
				ISSET(F_IOEB)  ? "present" : "absent"
				);
	return len;
}