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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 <linux/init.h>
#include <linux/console.h>
#include <asm/elf.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/procinfo.h>
#include <asm/segment.h>
#include <asm/setup.h>
#include <asm/system.h>
/* Work out which CPUs to support */
#ifdef CONFIG_ARCH_ACORN
#define SUPPORT_CPU_ARM6
#define SUPPORT_CPU_ARM7
#define SUPPORT_CPU_SA110
#else
#define SUPPORT_CPU_SA110
#endif
#ifdef CONFIG_CPU_ARM6
#define SUPPORT_CPU_ARM6
#endif
#ifdef CONFIG_CPU_ARM7
#define SUPPORT_CPU_ARM7
#endif
#ifdef CONFIG_CPU_SA110
#define SUPPORT_CPU_SA110
#endif
#define MEM_SIZE (16*1024*1024)
#define COMMAND_LINE_SIZE 256
#ifndef CONFIG_CMDLINE
#define CONFIG_CMDLINE ""
#endif
extern void reboot_setup(char *str, int *ints);
extern void fpe_init(void);
extern void disable_hlt(void);
struct drive_info_struct { char dummy[32]; } drive_info;
struct screen_info screen_info = {
orig_video_lines: 30,
orig_video_cols: 80,
orig_video_mode: 0,
orig_video_ega_bx: 0,
orig_video_isVGA: 1,
orig_video_points: 8
};
struct processor processor;
unsigned char aux_device_present;
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;
char elf_platform[ELF_PLATFORM_SIZE];
const struct armversions armidlist[] = {
/*-- Match -- --- Mask -- -- Manu -- Processor uname -m --- ELF STUFF ---
--- processor asm funcs --- */
#if defined(CONFIG_CPU_26)
/* ARM2 fake ident */
{ 0x41560200, 0xfffffff0, "ARM/VLSI", "arm2" , "armv1" , "v1", 0,
&arm2_processor_functions },
/* ARM250 fake ident */
{ 0x41560250, 0xfffffff0, "ARM/VLSI", "arm250" , "armv2" , "v2", HWCAP_SWP,
&arm250_processor_functions },
/* ARM3 processors */
{ 0x41560300, 0xfffffff0, "ARM/VLSI", "arm3" , "armv2" , "v2", HWCAP_SWP,
&arm3_processor_functions },
#elif defined(CONFIG_CPU_32)
#ifdef SUPPORT_CPU_ARM6
/* ARM6 */
{ 0x41560600, 0xfffffff0, "ARM/VLSI", "arm6" , "armv3" , "v3", HWCAP_SWP,
&arm6_processor_functions },
/* ARM610 */
{ 0x41560610, 0xfffffff0, "ARM/VLSI", "arm610" , "armv3" , "v3", HWCAP_SWP,
&arm6_processor_functions },
#endif
#ifdef SUPPORT_CPU_ARM7
/* ARM7's have a strange numbering */
{ 0x41007000, 0xffffff00, "ARM/VLSI", "arm7" , "armv3" , "v3", HWCAP_SWP,
&arm7_processor_functions },
/* ARM710 IDs are non-standard */
{ 0x41007100, 0xfff8ff00, "ARM/VLSI", "arm710" , "armv3" , "v3", HWCAP_SWP,
&arm7_processor_functions },
#endif
#ifdef SUPPORT_CPU_SA110
#ifdef CONFIG_ARCH_RPC
/* Acorn RiscPC's can't handle ARMv4 half-word instructions */
{ 0x4401a100, 0xfffffff0, "Intel", "sa110" , "armv4" , "v4", HWCAP_SWP,
&sa110_processor_functions },
#else
{ 0x4401a100, 0xfffffff0, "Intel", "sa110" , "armv4" , "v4", HWCAP_SWP|HWCAP_HALF,
&sa110_processor_functions },
#endif
#endif
#endif
{ 0x00000000, 0x00000000, "***", "unknown", "unknown", "**", 0, NULL }
};
/*
* From head-armv.S
*/
unsigned int processor_id;
unsigned int __machine_arch_type;
int armidindex;
extern int root_mountflags;
extern int _etext, _edata, _end;
/*-------------------------------------------------------------------------
* Early initialisation routines for various configurable items in the
* kernel. Each one either supplies a setup_ function, or defines this
* symbol to be empty if not configured.
*/
/*
* initial ram disk
*/
#ifdef CONFIG_BLK_DEV_INITRD
__initfunc(static void
check_initrd(unsigned long mem_start, unsigned long mem_end))
{
if (initrd_end > mem_end) {
printk ("initrd extends beyond end of memory "
"(0x%08lx > 0x%08lx) - disabling initrd\n",
initrd_end, mem_end);
initrd_start = 0;
}
}
#else
#define check_initrd(ms,me)
#endif
__initfunc(void
setup_processor(void))
{
armidindex = 0;
while ((armidlist[armidindex].id ^ processor_id) &
armidlist[armidindex].mask)
armidindex += 1;
if (armidlist[armidindex].id == 0)
while (1);
processor = *armidlist[armidindex].proc;
processor._proc_init();
}
static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
static char command_line[COMMAND_LINE_SIZE] = { 0, };
char saved_command_line[COMMAND_LINE_SIZE];
__initfunc(static void
setup_mem(char *cmd_line, unsigned long *mem_start, unsigned long *mem_sz))
{
char c = ' ', *to = command_line;
int len = 0;
*mem_start = (unsigned long)&_end;
for (;;) {
if (c == ' ') {
if (cmd_line[0] == 'm' &&
cmd_line[1] == 'e' &&
cmd_line[2] == 'm' &&
cmd_line[3] == '=') {
*mem_sz = simple_strtoul(cmd_line+4, &cmd_line, 0);
switch(*cmd_line) {
case 'M':
case 'm':
*mem_sz <<= 10;
case 'K':
case 'k':
*mem_sz <<= 10;
cmd_line++;
}
}
/* if there are two spaces, remove one */
if (*cmd_line == ' ') {
cmd_line++;
continue;
}
}
c = *cmd_line++;
if (!c)
break;
if (COMMAND_LINE_SIZE <= ++len)
break;
*to++ = c;
}
*to = '\0';
/* remove trailing spaces */
while (*--to == ' ' && to != command_line)
*to = '\0';
}
__initfunc(static void
setup_ram(int doload, int prompt, int image_start))
{
#ifdef CONFIG_BLK_DEV_RAM
extern int rd_doload;
extern int rd_prompt;
extern int rd_image_start;
rd_image_start = image_start;
rd_prompt = prompt;
rd_doload = doload;
#endif
}
/*
* initial ram disk
*/
__initfunc(static void
setup_initrd(unsigned int start, unsigned int size))
{
#ifdef CONFIG_BLK_DEV_INITRD
if (start) {
initrd_start = start;
initrd_end = start + size;
} else {
initrd_start = 0;
initrd_end = 0;
}
#endif
}
#ifdef CONFIG_ARCH_ACORN
int memc_ctrl_reg;
int number_mfm_drives;
unsigned int vram_size;
#endif
#ifndef PARAMS_BASE
#define PARAMS_BASE NULL
#endif
static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
#define ENDIANNESS ((char)endian_test.l)
__initfunc(void
setup_arch(char **cmdline_p, unsigned long * memory_start_p, unsigned long * memory_end_p))
{
struct param_struct *params = (struct param_struct *)PARAMS_BASE;
static unsigned char smptrap;
unsigned long memory_end = 0;
char *from = NULL;
if (smptrap == 1)
return;
smptrap = 1;
#if defined(CONFIG_ARCH_ARC)
__machine_arch_type = MACH_TYPE_ARCHIMEDES;
#elif defined(CONFIG_ARCH_A5K)
__machine_arch_type = MACH_TYPE_A5K;
#endif
setup_processor();
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;
/*
* Add your machine dependencies here
*/
switch (machine_arch_type) {
case MACH_TYPE_EBSA110:
/* EBSA110 locks if we execute 'wait for interrupt' */
disable_hlt();
params = NULL;
break;
case MACH_TYPE_EBSA285:
if (params) {
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;
}
break;
case MACH_TYPE_CO285:
{
#if 0
extern unsigned long boot_memory_end;
extern char boot_command_line[];
from = boot_command_line;
memory_end = boot_memory_end;
#endif
params = NULL;
}
break;
case MACH_TYPE_CATS:
/* CATS must use soft-reboot */
reboot_setup("s", NULL);
break;
case MACH_TYPE_NETWINDER:
/*
* to be fixed in a future NeTTrom
*/
if (params->u1.s.page_size == 4096) {
if (params->u1.s.nr_pages != 0x2000 &&
params->u1.s.nr_pages != 0x4000) {
printk("Warning: bad NeTTrom parameters detected, using defaults\n");
/*
* This stuff doesn't appear to be initialised
* properly by NeTTrom 2.0.6 and 2.0.7
*/
params->u1.s.nr_pages = 0x2000; /* 32MB */
params->u1.s.ramdisk_size = 0;
params->u1.s.flags = FLAG_READONLY;
params->u1.s.initrd_start = 0;
params->u1.s.initrd_size = 0;
params->u1.s.rd_start = 0;
params->u1.s.video_x = 0;
params->u1.s.video_y = 0;
params->u1.s.video_num_cols = 80;
params->u1.s.video_num_rows = 30;
}
} else {
printk("Warning: no NeTTrom parameter page detected, using "
"compiled-in settings\n");
params = NULL;
}
break;
default:
break;
}
if (params) {
memory_end = params->u1.s.page_size *
params->u1.s.nr_pages;
ROOT_DEV = to_kdev_t(params->u1.s.rootdev);
setup_ram((params->u1.s.flags & FLAG_RDLOAD) == 0,
(params->u1.s.flags & FLAG_RDPROMPT) == 0,
params->u1.s.rd_start);
setup_initrd(params->u1.s.initrd_start,
params->u1.s.initrd_size);
if (!(params->u1.s.flags & FLAG_READONLY))
root_mountflags &= ~MS_RDONLY;
#ifdef CONFIG_ARCH_ACORN
#ifdef CONFIG_ARCH_RPC
{
extern void init_dram_banks(struct param_struct *);
init_dram_banks(params);
}
#endif
memc_ctrl_reg = params->u1.s.memc_control_reg;
number_mfm_drives = (params->u1.s.adfsdrives >> 3) & 3;
vram_size = 0;
switch (params->u1.s.pages_in_vram) {
case 512:
vram_size += PAGE_SIZE * 256;
case 256:
vram_size += PAGE_SIZE * 256;
default:
break;
}
memory_end -= vram_size;
#endif
from = params->commandline;
} else {
ROOT_DEV = 0x00ff;
setup_ram(1, 1, 0);
setup_initrd(0, 0);
}
if (!memory_end)
memory_end = MEM_SIZE;
if (!from)
from = default_command_line;
#ifdef CONFIG_NWFPE
fpe_init();
#endif
/* Save unparsed command line copy for /proc/cmdline */
memcpy(saved_command_line, from, COMMAND_LINE_SIZE);
saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
setup_mem(from, memory_start_p, &memory_end);
memory_end += PAGE_OFFSET;
check_initrd(*memory_start_p, memory_end);
sprintf(system_utsname.machine, "%s%c", armidlist[armidindex].arch_vsn, ENDIANNESS);
sprintf(elf_platform, "%s%c", armidlist[armidindex].elf_vsn, ENDIANNESS);
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
#endif
*cmdline_p = command_line;
*memory_end_p = memory_end;
}
static const char *machine_desc[] = {
"EBSA110",
"Acorn-RiscPC",
"unknown",
"Nexus-FTV/PCI",
"EBSA285",
"Corel-NetWinder",
"Chalice-CATS",
"unknown-TBOX",
"co-EBSA285",
"CL-PS7110",
"Acorn-Archimedes",
"Acorn-A5000"
};
int get_cpuinfo(char * buffer)
{
int len;
len = sprintf(buffer,
"Processor\t: %s %s rev %d\n"
"BogoMips\t: %lu.%02lu\n"
"Hardware\t: %s\n",
armidlist[armidindex].manu,
armidlist[armidindex].name,
(int)processor_id & 15,
(loops_per_sec+2500) / 500000,
((loops_per_sec+2500) / 5000) % 100,
machine_desc[machine_arch_type]);
return len;
}
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