2 * linux/arch/m68k/kernel/setup.c
4 * Copyright (C) 1995 Hamish Macdonald
8 * This file handles the architecture-dependent parts of system setup
11 #include <linux/kernel.h>
13 #include <linux/sched.h>
14 #include <linux/delay.h>
15 #include <linux/interrupt.h>
17 #include <linux/console.h>
18 #include <linux/genhd.h>
19 #include <linux/errno.h>
20 #include <linux/string.h>
21 #include <linux/init.h>
22 #include <linux/bootmem.h>
23 #include <linux/proc_fs.h>
24 #include <linux/seq_file.h>
25 #include <linux/module.h>
26 #include <linux/initrd.h>
28 #include <asm/bootinfo.h>
29 #include <asm/sections.h>
30 #include <asm/setup.h>
34 #include <asm/machdep.h>
36 #include <asm/amigahw.h>
39 #include <asm/atarihw.h>
40 #include <asm/atari_stram.h>
45 #include <asm/natfeat.h>
47 #if !FPSTATESIZE || !NR_IRQS
48 #warning No CPU/platform type selected, your kernel will not work!
49 #warning Are you building an allnoconfig kernel?
52 unsigned long m68k_machtype;
53 EXPORT_SYMBOL(m68k_machtype);
54 unsigned long m68k_cputype;
55 EXPORT_SYMBOL(m68k_cputype);
56 unsigned long m68k_fputype;
57 unsigned long m68k_mmutype;
58 EXPORT_SYMBOL(m68k_mmutype);
60 unsigned long vme_brdtype;
61 EXPORT_SYMBOL(vme_brdtype);
65 EXPORT_SYMBOL(m68k_is040or060);
67 extern unsigned long availmem;
70 EXPORT_SYMBOL(m68k_num_memory);
71 int m68k_realnum_memory;
72 EXPORT_SYMBOL(m68k_realnum_memory);
73 unsigned long m68k_memoffset;
74 struct mem_info m68k_memory[NUM_MEMINFO];
75 EXPORT_SYMBOL(m68k_memory);
77 struct mem_info m68k_ramdisk;
79 static char m68k_command_line[CL_SIZE];
81 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
82 /* machine dependent irq functions */
83 void (*mach_init_IRQ) (void) __initdata = NULL;
84 void (*mach_get_model) (char *model);
85 void (*mach_get_hardware_list) (struct seq_file *m);
86 /* machine dependent timer functions */
87 int (*mach_hwclk) (int, struct rtc_time*);
88 EXPORT_SYMBOL(mach_hwclk);
89 int (*mach_set_clock_mmss) (unsigned long);
90 unsigned int (*mach_get_ss)(void);
91 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
92 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
93 EXPORT_SYMBOL(mach_get_ss);
94 EXPORT_SYMBOL(mach_get_rtc_pll);
95 EXPORT_SYMBOL(mach_set_rtc_pll);
96 void (*mach_reset)( void );
97 void (*mach_halt)( void );
98 void (*mach_power_off)( void );
99 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
100 #ifdef CONFIG_HEARTBEAT
101 void (*mach_heartbeat) (int);
102 EXPORT_SYMBOL(mach_heartbeat);
104 #ifdef CONFIG_M68K_L2_CACHE
105 void (*mach_l2_flush) (int);
107 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
108 void (*mach_beep)(unsigned int, unsigned int);
109 EXPORT_SYMBOL(mach_beep);
111 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
114 EXPORT_SYMBOL(isa_type);
115 EXPORT_SYMBOL(isa_sex);
118 extern int amiga_parse_bootinfo(const struct bi_record *);
119 extern int atari_parse_bootinfo(const struct bi_record *);
120 extern int mac_parse_bootinfo(const struct bi_record *);
121 extern int q40_parse_bootinfo(const struct bi_record *);
122 extern int bvme6000_parse_bootinfo(const struct bi_record *);
123 extern int mvme16x_parse_bootinfo(const struct bi_record *);
124 extern int mvme147_parse_bootinfo(const struct bi_record *);
125 extern int hp300_parse_bootinfo(const struct bi_record *);
126 extern int apollo_parse_bootinfo(const struct bi_record *);
128 extern void config_amiga(void);
129 extern void config_atari(void);
130 extern void config_mac(void);
131 extern void config_sun3(void);
132 extern void config_apollo(void);
133 extern void config_mvme147(void);
134 extern void config_mvme16x(void);
135 extern void config_bvme6000(void);
136 extern void config_hp300(void);
137 extern void config_q40(void);
138 extern void config_sun3x(void);
140 #define MASK_256K 0xfffc0000
142 extern void paging_init(void);
144 static void __init m68k_parse_bootinfo(const struct bi_record *record)
146 while (record->tag != BI_LAST) {
148 const unsigned long *data = record->data;
150 switch (record->tag) {
155 /* Already set up by head.S */
159 if (m68k_num_memory < NUM_MEMINFO) {
160 m68k_memory[m68k_num_memory].addr = data[0];
161 m68k_memory[m68k_num_memory].size = data[1];
164 printk("m68k_parse_bootinfo: too many memory chunks\n");
168 m68k_ramdisk.addr = data[0];
169 m68k_ramdisk.size = data[1];
172 case BI_COMMAND_LINE:
173 strlcpy(m68k_command_line, (const char *)data,
174 sizeof(m68k_command_line));
179 unknown = amiga_parse_bootinfo(record);
180 else if (MACH_IS_ATARI)
181 unknown = atari_parse_bootinfo(record);
182 else if (MACH_IS_MAC)
183 unknown = mac_parse_bootinfo(record);
184 else if (MACH_IS_Q40)
185 unknown = q40_parse_bootinfo(record);
186 else if (MACH_IS_BVME6000)
187 unknown = bvme6000_parse_bootinfo(record);
188 else if (MACH_IS_MVME16x)
189 unknown = mvme16x_parse_bootinfo(record);
190 else if (MACH_IS_MVME147)
191 unknown = mvme147_parse_bootinfo(record);
192 else if (MACH_IS_HP300)
193 unknown = hp300_parse_bootinfo(record);
194 else if (MACH_IS_APOLLO)
195 unknown = apollo_parse_bootinfo(record);
200 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
202 record = (struct bi_record *)((unsigned long)record +
206 m68k_realnum_memory = m68k_num_memory;
207 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
208 if (m68k_num_memory > 1) {
209 printk("Ignoring last %i chunks of physical memory\n",
210 (m68k_num_memory - 1));
216 void __init setup_arch(char **cmdline_p)
222 /* The bootinfo is located right after the kernel bss */
223 if (!CPU_IS_COLDFIRE)
224 m68k_parse_bootinfo((const struct bi_record *)_end);
231 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
232 * be confused by software FPU emulation. BEWARE.
233 * We should really do our own FPU check at startup.
234 * [what do we do with buggy 68LC040s? if we have problems
235 * with them, we should add a test to check_bugs() below] */
236 #ifndef CONFIG_M68KFPU_EMU_ONLY
237 /* clear the fpu if we have one */
238 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
239 volatile int zero = 0;
240 asm volatile ("frestore %0" : : "m" (zero));
247 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
249 if (((pcr >> 8) & 0xff) <= 5) {
250 printk("Enabling workaround for errata I14\n");
251 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
252 : : "d" (pcr | 0x20));
256 init_mm.start_code = PAGE_OFFSET;
257 init_mm.end_code = (unsigned long)_etext;
258 init_mm.end_data = (unsigned long)_edata;
259 init_mm.brk = (unsigned long)_end;
261 #if defined(CONFIG_BOOTPARAM)
262 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
263 m68k_command_line[CL_SIZE - 1] = 0;
264 #endif /* CONFIG_BOOTPARAM */
265 *cmdline_p = m68k_command_line;
266 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
270 #ifdef CONFIG_DUMMY_CONSOLE
271 conswitchp = &dummy_con;
274 switch (m68k_machtype) {
300 #ifdef CONFIG_MVME147
305 #ifdef CONFIG_MVME16x
310 #ifdef CONFIG_BVME6000
330 #ifdef CONFIG_COLDFIRE
336 panic("No configuration setup");
339 #ifdef CONFIG_NATFEAT
346 for (i = 1; i < m68k_num_memory; i++)
347 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
348 m68k_memory[i].size);
349 #ifdef CONFIG_BLK_DEV_INITRD
350 if (m68k_ramdisk.size) {
351 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
352 m68k_ramdisk.addr, m68k_ramdisk.size,
354 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
355 initrd_end = initrd_start + m68k_ramdisk.size;
356 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
362 atari_stram_reserve_pages((void *)availmem);
370 #endif /* !CONFIG_SUN3 */
372 /* set ISA defs early as possible */
373 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
375 isa_type = ISA_TYPE_Q40;
378 #ifdef CONFIG_AMIGA_PCMCIA
379 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
380 isa_type = ISA_TYPE_AG;
384 #ifdef CONFIG_ATARI_ROM_ISA
386 isa_type = ISA_TYPE_ENEC;
393 static int show_cpuinfo(struct seq_file *m, void *v)
395 const char *cpu, *mmu, *fpu;
396 unsigned long clockfreq, clockfactor;
398 #define LOOP_CYCLES_68020 (8)
399 #define LOOP_CYCLES_68030 (8)
400 #define LOOP_CYCLES_68040 (3)
401 #define LOOP_CYCLES_68060 (1)
402 #define LOOP_CYCLES_COLDFIRE (2)
406 clockfactor = LOOP_CYCLES_68020;
407 } else if (CPU_IS_030) {
409 clockfactor = LOOP_CYCLES_68030;
410 } else if (CPU_IS_040) {
412 clockfactor = LOOP_CYCLES_68040;
413 } else if (CPU_IS_060) {
415 clockfactor = LOOP_CYCLES_68060;
416 } else if (CPU_IS_COLDFIRE) {
418 clockfactor = LOOP_CYCLES_COLDFIRE;
424 #ifdef CONFIG_M68KFPU_EMU_ONLY
425 fpu = "none(soft float)";
427 if (m68k_fputype & FPU_68881)
429 else if (m68k_fputype & FPU_68882)
431 else if (m68k_fputype & FPU_68040)
433 else if (m68k_fputype & FPU_68060)
435 else if (m68k_fputype & FPU_SUNFPA)
437 else if (m68k_fputype & FPU_COLDFIRE)
443 if (m68k_mmutype & MMU_68851)
445 else if (m68k_mmutype & MMU_68030)
447 else if (m68k_mmutype & MMU_68040)
449 else if (m68k_mmutype & MMU_68060)
451 else if (m68k_mmutype & MMU_SUN3)
453 else if (m68k_mmutype & MMU_APOLLO)
455 else if (m68k_mmutype & MMU_COLDFIRE)
460 clockfreq = loops_per_jiffy * HZ * clockfactor;
462 seq_printf(m, "CPU:\t\t%s\n"
465 "Clocking:\t%lu.%1luMHz\n"
466 "BogoMips:\t%lu.%02lu\n"
467 "Calibration:\t%lu loops\n",
469 clockfreq/1000000,(clockfreq/100000)%10,
470 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
475 static void *c_start(struct seq_file *m, loff_t *pos)
477 return *pos < 1 ? (void *)1 : NULL;
479 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
484 static void c_stop(struct seq_file *m, void *v)
487 const struct seq_operations cpuinfo_op = {
491 .show = show_cpuinfo,
494 #ifdef CONFIG_PROC_HARDWARE
495 static int hardware_proc_show(struct seq_file *m, void *v)
502 mach_get_model(model);
504 strcpy(model, "Unknown m68k");
506 seq_printf(m, "Model:\t\t%s\n", model);
507 for (mem = 0, i = 0; i < m68k_num_memory; i++)
508 mem += m68k_memory[i].size;
509 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
511 if (mach_get_hardware_list)
512 mach_get_hardware_list(m);
517 static int hardware_proc_open(struct inode *inode, struct file *file)
519 return single_open(file, hardware_proc_show, NULL);
522 static const struct file_operations hardware_proc_fops = {
523 .open = hardware_proc_open,
526 .release = single_release,
529 static int __init proc_hardware_init(void)
531 proc_create("hardware", 0, NULL, &hardware_proc_fops);
534 module_init(proc_hardware_init);
537 void check_bugs(void)
539 #ifndef CONFIG_M68KFPU_EMU
540 if (m68k_fputype == 0) {
541 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
542 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
543 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
544 "emulation project\n");
547 #endif /* !CONFIG_M68KFPU_EMU */
551 static int __init adb_probe_sync_enable (char *str) {
552 extern int __adb_probe_sync;
553 __adb_probe_sync = 1;
557 __setup("adb_sync", adb_probe_sync_enable);
558 #endif /* CONFIG_ADB */