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/*
* linux/arch/arm/kernel/setup-sa.c
*
* Copyright (C) 1995, 1996 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/ldt.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/init.h>
#include <asm/hardware.h>
#include <asm/pgtable.h>
#include <asm/segment.h>
#include <asm/setup.h>
#include <asm/system.h>
#ifndef CONFIG_CMDLINE
#define CONFIG_CMDLINE "root=nfs rw console=ttyS1,38400n8"
#endif
#define COMMAND_LINE_SIZE 256
#define MEM_SIZE (16*1024*1024)
static char command_line[COMMAND_LINE_SIZE] = { 0, };
char saved_command_line[COMMAND_LINE_SIZE];
struct processor processor;
struct screen_info screen_info;
unsigned char aux_device_present;
unsigned long arm_id;
extern int root_mountflags;
extern int _etext, _edata, _end;
extern const struct processor sa110_processor_functions;
#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 inline void setup_ramdisk(int start, int prompt, int load)
{
rd_image_start = start;
rd_prompt = prompt;
rd_doload = load;
}
#else
#define setup_ramdisk(start,prompt,load)
#endif
#ifdef PARAMS_BASE
static struct param_struct *params = (struct param_struct *)PARAMS_BASE;
static inline char *setup_params(unsigned long *mem_end_p)
{
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->u1.s.rd_start,
(params->u1.s.flags & FLAG_RDPROMPT) == 0,
(params->u1.s.flags & FLAG_RDLOAD) == 0);
*mem_end_p = 0xc0000000 + MEM_SIZE;
return params->commandline;
}
#else
static char default_command_line[] = CONFIG_CMDLINE;
static inline char *setup_params(unsigned long *mem_end_p)
{
ROOT_DEV = 0x00ff;
setup_ramdisk(0, 1, 1);
*mem_end_p = 0xc0000000 + MEM_SIZE;
return default_command_line;
}
#endif
__initfunc(void setup_arch(char **cmdline_p,
unsigned long * memory_start_p, unsigned long * memory_end_p))
{
unsigned long memory_start, memory_end;
char c = ' ', *to = command_line, *from;
int len = 0;
memory_start = (unsigned long)&_end;
processor = sa110_processor_functions;
processor._proc_init();
from = setup_params(&memory_end);
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;
strcpy (system_utsname.machine, "sa110");
}
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",
"sa110",
(int)arm_id & 15,
"DEC",
"yes",
(loops_per_sec+2500) / 500000,
((loops_per_sec+2500) / 5000) % 100);
return len;
}
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