535 строки
12 KiB
C
535 строки
12 KiB
C
/*
|
|
* linux/arch/m68k/kernel/setup.c
|
|
*
|
|
* Copyright (C) 1995 Hamish Macdonald
|
|
*/
|
|
|
|
/*
|
|
* This file handles the architecture-dependent parts of system setup
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/console.h>
|
|
#include <linux/genhd.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/init.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/module.h>
|
|
#include <linux/initrd.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/fpu.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/io.h>
|
|
#include <asm/machdep.h>
|
|
#ifdef CONFIG_AMIGA
|
|
#include <asm/amigahw.h>
|
|
#endif
|
|
#ifdef CONFIG_ATARI
|
|
#include <asm/atarihw.h>
|
|
#include <asm/atari_stram.h>
|
|
#endif
|
|
#ifdef CONFIG_SUN3X
|
|
#include <asm/dvma.h>
|
|
#endif
|
|
|
|
#if !FPSTATESIZE || !NR_IRQS
|
|
#warning No CPU/platform type selected, your kernel will not work!
|
|
#warning Are you building an allnoconfig kernel?
|
|
#endif
|
|
|
|
unsigned long m68k_machtype;
|
|
EXPORT_SYMBOL(m68k_machtype);
|
|
unsigned long m68k_cputype;
|
|
EXPORT_SYMBOL(m68k_cputype);
|
|
unsigned long m68k_fputype;
|
|
unsigned long m68k_mmutype;
|
|
EXPORT_SYMBOL(m68k_mmutype);
|
|
#ifdef CONFIG_VME
|
|
unsigned long vme_brdtype;
|
|
EXPORT_SYMBOL(vme_brdtype);
|
|
#endif
|
|
|
|
int m68k_is040or060;
|
|
EXPORT_SYMBOL(m68k_is040or060);
|
|
|
|
extern unsigned long availmem;
|
|
|
|
int m68k_num_memory;
|
|
EXPORT_SYMBOL(m68k_num_memory);
|
|
int m68k_realnum_memory;
|
|
EXPORT_SYMBOL(m68k_realnum_memory);
|
|
unsigned long m68k_memoffset;
|
|
struct mem_info m68k_memory[NUM_MEMINFO];
|
|
EXPORT_SYMBOL(m68k_memory);
|
|
|
|
struct mem_info m68k_ramdisk;
|
|
|
|
static char m68k_command_line[CL_SIZE];
|
|
|
|
void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
|
|
/* machine dependent irq functions */
|
|
void (*mach_init_IRQ) (void) __initdata = NULL;
|
|
void (*mach_get_model) (char *model);
|
|
void (*mach_get_hardware_list) (struct seq_file *m);
|
|
/* machine dependent timer functions */
|
|
unsigned long (*mach_gettimeoffset) (void);
|
|
int (*mach_hwclk) (int, struct rtc_time*);
|
|
EXPORT_SYMBOL(mach_hwclk);
|
|
int (*mach_set_clock_mmss) (unsigned long);
|
|
unsigned int (*mach_get_ss)(void);
|
|
int (*mach_get_rtc_pll)(struct rtc_pll_info *);
|
|
int (*mach_set_rtc_pll)(struct rtc_pll_info *);
|
|
EXPORT_SYMBOL(mach_get_ss);
|
|
EXPORT_SYMBOL(mach_get_rtc_pll);
|
|
EXPORT_SYMBOL(mach_set_rtc_pll);
|
|
void (*mach_reset)( void );
|
|
void (*mach_halt)( void );
|
|
void (*mach_power_off)( void );
|
|
long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
|
|
#ifdef CONFIG_HEARTBEAT
|
|
void (*mach_heartbeat) (int);
|
|
EXPORT_SYMBOL(mach_heartbeat);
|
|
#endif
|
|
#ifdef CONFIG_M68K_L2_CACHE
|
|
void (*mach_l2_flush) (int);
|
|
#endif
|
|
#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
|
|
void (*mach_beep)(unsigned int, unsigned int);
|
|
EXPORT_SYMBOL(mach_beep);
|
|
#endif
|
|
#if defined(CONFIG_ISA) && defined(MULTI_ISA)
|
|
int isa_type;
|
|
int isa_sex;
|
|
EXPORT_SYMBOL(isa_type);
|
|
EXPORT_SYMBOL(isa_sex);
|
|
#endif
|
|
|
|
extern int amiga_parse_bootinfo(const struct bi_record *);
|
|
extern int atari_parse_bootinfo(const struct bi_record *);
|
|
extern int mac_parse_bootinfo(const struct bi_record *);
|
|
extern int q40_parse_bootinfo(const struct bi_record *);
|
|
extern int bvme6000_parse_bootinfo(const struct bi_record *);
|
|
extern int mvme16x_parse_bootinfo(const struct bi_record *);
|
|
extern int mvme147_parse_bootinfo(const struct bi_record *);
|
|
extern int hp300_parse_bootinfo(const struct bi_record *);
|
|
extern int apollo_parse_bootinfo(const struct bi_record *);
|
|
|
|
extern void config_amiga(void);
|
|
extern void config_atari(void);
|
|
extern void config_mac(void);
|
|
extern void config_sun3(void);
|
|
extern void config_apollo(void);
|
|
extern void config_mvme147(void);
|
|
extern void config_mvme16x(void);
|
|
extern void config_bvme6000(void);
|
|
extern void config_hp300(void);
|
|
extern void config_q40(void);
|
|
extern void config_sun3x(void);
|
|
|
|
#define MASK_256K 0xfffc0000
|
|
|
|
extern void paging_init(void);
|
|
|
|
static void __init m68k_parse_bootinfo(const struct bi_record *record)
|
|
{
|
|
while (record->tag != BI_LAST) {
|
|
int unknown = 0;
|
|
const unsigned long *data = record->data;
|
|
|
|
switch (record->tag) {
|
|
case BI_MACHTYPE:
|
|
case BI_CPUTYPE:
|
|
case BI_FPUTYPE:
|
|
case BI_MMUTYPE:
|
|
/* Already set up by head.S */
|
|
break;
|
|
|
|
case BI_MEMCHUNK:
|
|
if (m68k_num_memory < NUM_MEMINFO) {
|
|
m68k_memory[m68k_num_memory].addr = data[0];
|
|
m68k_memory[m68k_num_memory].size = data[1];
|
|
m68k_num_memory++;
|
|
} else
|
|
printk("m68k_parse_bootinfo: too many memory chunks\n");
|
|
break;
|
|
|
|
case BI_RAMDISK:
|
|
m68k_ramdisk.addr = data[0];
|
|
m68k_ramdisk.size = data[1];
|
|
break;
|
|
|
|
case BI_COMMAND_LINE:
|
|
strlcpy(m68k_command_line, (const char *)data,
|
|
sizeof(m68k_command_line));
|
|
break;
|
|
|
|
default:
|
|
if (MACH_IS_AMIGA)
|
|
unknown = amiga_parse_bootinfo(record);
|
|
else if (MACH_IS_ATARI)
|
|
unknown = atari_parse_bootinfo(record);
|
|
else if (MACH_IS_MAC)
|
|
unknown = mac_parse_bootinfo(record);
|
|
else if (MACH_IS_Q40)
|
|
unknown = q40_parse_bootinfo(record);
|
|
else if (MACH_IS_BVME6000)
|
|
unknown = bvme6000_parse_bootinfo(record);
|
|
else if (MACH_IS_MVME16x)
|
|
unknown = mvme16x_parse_bootinfo(record);
|
|
else if (MACH_IS_MVME147)
|
|
unknown = mvme147_parse_bootinfo(record);
|
|
else if (MACH_IS_HP300)
|
|
unknown = hp300_parse_bootinfo(record);
|
|
else if (MACH_IS_APOLLO)
|
|
unknown = apollo_parse_bootinfo(record);
|
|
else
|
|
unknown = 1;
|
|
}
|
|
if (unknown)
|
|
printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
|
|
record->tag);
|
|
record = (struct bi_record *)((unsigned long)record +
|
|
record->size);
|
|
}
|
|
|
|
m68k_realnum_memory = m68k_num_memory;
|
|
#ifdef CONFIG_SINGLE_MEMORY_CHUNK
|
|
if (m68k_num_memory > 1) {
|
|
printk("Ignoring last %i chunks of physical memory\n",
|
|
(m68k_num_memory - 1));
|
|
m68k_num_memory = 1;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
int i;
|
|
|
|
/* The bootinfo is located right after the kernel bss */
|
|
m68k_parse_bootinfo((const struct bi_record *)_end);
|
|
|
|
if (CPU_IS_040)
|
|
m68k_is040or060 = 4;
|
|
else if (CPU_IS_060)
|
|
m68k_is040or060 = 6;
|
|
|
|
/* FIXME: m68k_fputype is passed in by Penguin booter, which can
|
|
* be confused by software FPU emulation. BEWARE.
|
|
* We should really do our own FPU check at startup.
|
|
* [what do we do with buggy 68LC040s? if we have problems
|
|
* with them, we should add a test to check_bugs() below] */
|
|
#ifndef CONFIG_M68KFPU_EMU_ONLY
|
|
/* clear the fpu if we have one */
|
|
if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
|
|
volatile int zero = 0;
|
|
asm volatile ("frestore %0" : : "m" (zero));
|
|
}
|
|
#endif
|
|
|
|
if (CPU_IS_060) {
|
|
u32 pcr;
|
|
|
|
asm (".chip 68060; movec %%pcr,%0; .chip 68k"
|
|
: "=d" (pcr));
|
|
if (((pcr >> 8) & 0xff) <= 5) {
|
|
printk("Enabling workaround for errata I14\n");
|
|
asm (".chip 68060; movec %0,%%pcr; .chip 68k"
|
|
: : "d" (pcr | 0x20));
|
|
}
|
|
}
|
|
|
|
init_mm.start_code = PAGE_OFFSET;
|
|
init_mm.end_code = (unsigned long)_etext;
|
|
init_mm.end_data = (unsigned long)_edata;
|
|
init_mm.brk = (unsigned long)_end;
|
|
|
|
*cmdline_p = m68k_command_line;
|
|
memcpy(boot_command_line, *cmdline_p, CL_SIZE);
|
|
|
|
parse_early_param();
|
|
|
|
#ifdef CONFIG_DUMMY_CONSOLE
|
|
conswitchp = &dummy_con;
|
|
#endif
|
|
|
|
switch (m68k_machtype) {
|
|
#ifdef CONFIG_AMIGA
|
|
case MACH_AMIGA:
|
|
config_amiga();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_ATARI
|
|
case MACH_ATARI:
|
|
config_atari();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_MAC
|
|
case MACH_MAC:
|
|
config_mac();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_SUN3
|
|
case MACH_SUN3:
|
|
config_sun3();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_APOLLO
|
|
case MACH_APOLLO:
|
|
config_apollo();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_MVME147
|
|
case MACH_MVME147:
|
|
config_mvme147();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_MVME16x
|
|
case MACH_MVME16x:
|
|
config_mvme16x();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_BVME6000
|
|
case MACH_BVME6000:
|
|
config_bvme6000();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_HP300
|
|
case MACH_HP300:
|
|
config_hp300();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_Q40
|
|
case MACH_Q40:
|
|
config_q40();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_SUN3X
|
|
case MACH_SUN3X:
|
|
config_sun3x();
|
|
break;
|
|
#endif
|
|
default:
|
|
panic("No configuration setup");
|
|
}
|
|
|
|
paging_init();
|
|
|
|
#ifndef CONFIG_SUN3
|
|
for (i = 1; i < m68k_num_memory; i++)
|
|
free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
|
|
m68k_memory[i].size);
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
if (m68k_ramdisk.size) {
|
|
reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
|
|
m68k_ramdisk.addr, m68k_ramdisk.size,
|
|
BOOTMEM_DEFAULT);
|
|
initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
|
|
initrd_end = initrd_start + m68k_ramdisk.size;
|
|
printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_ATARI
|
|
if (MACH_IS_ATARI)
|
|
atari_stram_reserve_pages((void *)availmem);
|
|
#endif
|
|
#ifdef CONFIG_SUN3X
|
|
if (MACH_IS_SUN3X) {
|
|
dvma_init();
|
|
}
|
|
#endif
|
|
|
|
#endif /* !CONFIG_SUN3 */
|
|
|
|
/* set ISA defs early as possible */
|
|
#if defined(CONFIG_ISA) && defined(MULTI_ISA)
|
|
if (MACH_IS_Q40) {
|
|
isa_type = ISA_TYPE_Q40;
|
|
isa_sex = 0;
|
|
}
|
|
#ifdef CONFIG_GG2
|
|
if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
|
|
isa_type = ISA_TYPE_GG2;
|
|
isa_sex = 0;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_AMIGA_PCMCIA
|
|
if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
|
|
isa_type = ISA_TYPE_AG;
|
|
isa_sex = 1;
|
|
}
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
const char *cpu, *mmu, *fpu;
|
|
unsigned long clockfreq, clockfactor;
|
|
|
|
#define LOOP_CYCLES_68020 (8)
|
|
#define LOOP_CYCLES_68030 (8)
|
|
#define LOOP_CYCLES_68040 (3)
|
|
#define LOOP_CYCLES_68060 (1)
|
|
|
|
if (CPU_IS_020) {
|
|
cpu = "68020";
|
|
clockfactor = LOOP_CYCLES_68020;
|
|
} else if (CPU_IS_030) {
|
|
cpu = "68030";
|
|
clockfactor = LOOP_CYCLES_68030;
|
|
} else if (CPU_IS_040) {
|
|
cpu = "68040";
|
|
clockfactor = LOOP_CYCLES_68040;
|
|
} else if (CPU_IS_060) {
|
|
cpu = "68060";
|
|
clockfactor = LOOP_CYCLES_68060;
|
|
} else {
|
|
cpu = "680x0";
|
|
clockfactor = 0;
|
|
}
|
|
|
|
#ifdef CONFIG_M68KFPU_EMU_ONLY
|
|
fpu = "none(soft float)";
|
|
#else
|
|
if (m68k_fputype & FPU_68881)
|
|
fpu = "68881";
|
|
else if (m68k_fputype & FPU_68882)
|
|
fpu = "68882";
|
|
else if (m68k_fputype & FPU_68040)
|
|
fpu = "68040";
|
|
else if (m68k_fputype & FPU_68060)
|
|
fpu = "68060";
|
|
else if (m68k_fputype & FPU_SUNFPA)
|
|
fpu = "Sun FPA";
|
|
else
|
|
fpu = "none";
|
|
#endif
|
|
|
|
if (m68k_mmutype & MMU_68851)
|
|
mmu = "68851";
|
|
else if (m68k_mmutype & MMU_68030)
|
|
mmu = "68030";
|
|
else if (m68k_mmutype & MMU_68040)
|
|
mmu = "68040";
|
|
else if (m68k_mmutype & MMU_68060)
|
|
mmu = "68060";
|
|
else if (m68k_mmutype & MMU_SUN3)
|
|
mmu = "Sun-3";
|
|
else if (m68k_mmutype & MMU_APOLLO)
|
|
mmu = "Apollo";
|
|
else
|
|
mmu = "unknown";
|
|
|
|
clockfreq = loops_per_jiffy * HZ * clockfactor;
|
|
|
|
seq_printf(m, "CPU:\t\t%s\n"
|
|
"MMU:\t\t%s\n"
|
|
"FPU:\t\t%s\n"
|
|
"Clocking:\t%lu.%1luMHz\n"
|
|
"BogoMips:\t%lu.%02lu\n"
|
|
"Calibration:\t%lu loops\n",
|
|
cpu, mmu, fpu,
|
|
clockfreq/1000000,(clockfreq/100000)%10,
|
|
loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
|
|
loops_per_jiffy);
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
return *pos < 1 ? (void *)1 : NULL;
|
|
}
|
|
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return NULL;
|
|
}
|
|
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,
|
|
};
|
|
|
|
#ifdef CONFIG_PROC_HARDWARE
|
|
static int hardware_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
char model[80];
|
|
unsigned long mem;
|
|
int i;
|
|
|
|
if (mach_get_model)
|
|
mach_get_model(model);
|
|
else
|
|
strcpy(model, "Unknown m68k");
|
|
|
|
seq_printf(m, "Model:\t\t%s\n", model);
|
|
for (mem = 0, i = 0; i < m68k_num_memory; i++)
|
|
mem += m68k_memory[i].size;
|
|
seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
|
|
|
|
if (mach_get_hardware_list)
|
|
mach_get_hardware_list(m);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hardware_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, hardware_proc_show, NULL);
|
|
}
|
|
|
|
static const struct file_operations hardware_proc_fops = {
|
|
.open = hardware_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int __init proc_hardware_init(void)
|
|
{
|
|
proc_create("hardware", 0, NULL, &hardware_proc_fops);
|
|
return 0;
|
|
}
|
|
module_init(proc_hardware_init);
|
|
#endif
|
|
|
|
void check_bugs(void)
|
|
{
|
|
#ifndef CONFIG_M68KFPU_EMU
|
|
if (m68k_fputype == 0) {
|
|
printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
|
|
"WHICH IS REQUIRED BY LINUX/M68K ***\n");
|
|
printk(KERN_EMERG "Upgrade your hardware or join the FPU "
|
|
"emulation project\n");
|
|
panic("no FPU");
|
|
}
|
|
#endif /* !CONFIG_M68KFPU_EMU */
|
|
}
|
|
|
|
#ifdef CONFIG_ADB
|
|
static int __init adb_probe_sync_enable (char *str) {
|
|
extern int __adb_probe_sync;
|
|
__adb_probe_sync = 1;
|
|
return 1;
|
|
}
|
|
|
|
__setup("adb_sync", adb_probe_sync_enable);
|
|
#endif /* CONFIG_ADB */
|