1 // SPDX-License-Identifier: GPL-2.0
3 * linux/arch/m68k/kernel/setup.c
5 * Copyright (C) 1995 Hamish Macdonald
9 * This file handles the architecture-dependent parts of system setup
12 #include <linux/kernel.h>
13 #include <linux/cpu.h>
15 #include <linux/sched.h>
16 #include <linux/delay.h>
17 #include <linux/interrupt.h>
19 #include <linux/console.h>
20 #include <linux/genhd.h>
21 #include <linux/errno.h>
22 #include <linux/string.h>
23 #include <linux/init.h>
24 #include <linux/bootmem.h>
25 #include <linux/proc_fs.h>
26 #include <linux/seq_file.h>
27 #include <linux/module.h>
28 #include <linux/initrd.h>
30 #include <asm/bootinfo.h>
31 #include <asm/byteorder.h>
32 #include <asm/sections.h>
33 #include <asm/setup.h>
37 #include <asm/machdep.h>
39 #include <asm/amigahw.h>
42 #include <asm/atarihw.h>
43 #include <asm/atari_stram.h>
48 #include <asm/natfeat.h>
50 #if !FPSTATESIZE || !NR_IRQS
51 #warning No CPU/platform type selected, your kernel will not work!
52 #warning Are you building an allnoconfig kernel?
55 unsigned long m68k_machtype;
56 EXPORT_SYMBOL(m68k_machtype);
57 unsigned long m68k_cputype;
58 EXPORT_SYMBOL(m68k_cputype);
59 unsigned long m68k_fputype;
60 unsigned long m68k_mmutype;
61 EXPORT_SYMBOL(m68k_mmutype);
63 unsigned long vme_brdtype;
64 EXPORT_SYMBOL(vme_brdtype);
68 EXPORT_SYMBOL(m68k_is040or060);
70 extern unsigned long availmem;
73 EXPORT_SYMBOL(m68k_num_memory);
74 int m68k_realnum_memory;
75 EXPORT_SYMBOL(m68k_realnum_memory);
76 unsigned long m68k_memoffset;
77 struct m68k_mem_info m68k_memory[NUM_MEMINFO];
78 EXPORT_SYMBOL(m68k_memory);
80 static struct m68k_mem_info m68k_ramdisk __initdata;
82 static char m68k_command_line[CL_SIZE] __initdata;
84 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
85 /* machine dependent irq functions */
86 void (*mach_init_IRQ) (void) __initdata = NULL;
87 void (*mach_get_model) (char *model);
88 void (*mach_get_hardware_list) (struct seq_file *m);
89 /* machine dependent timer functions */
90 int (*mach_hwclk) (int, struct rtc_time*);
91 EXPORT_SYMBOL(mach_hwclk);
92 int (*mach_set_clock_mmss) (unsigned long);
93 unsigned int (*mach_get_ss)(void);
94 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
95 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
96 EXPORT_SYMBOL(mach_get_ss);
97 EXPORT_SYMBOL(mach_get_rtc_pll);
98 EXPORT_SYMBOL(mach_set_rtc_pll);
99 void (*mach_reset)( void );
100 void (*mach_halt)( void );
101 void (*mach_power_off)( void );
102 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
103 #ifdef CONFIG_HEARTBEAT
104 void (*mach_heartbeat) (int);
105 EXPORT_SYMBOL(mach_heartbeat);
107 #ifdef CONFIG_M68K_L2_CACHE
108 void (*mach_l2_flush) (int);
110 #if IS_ENABLED(CONFIG_INPUT_M68K_BEEP)
111 void (*mach_beep)(unsigned int, unsigned int);
112 EXPORT_SYMBOL(mach_beep);
114 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
117 EXPORT_SYMBOL(isa_type);
118 EXPORT_SYMBOL(isa_sex);
121 extern int amiga_parse_bootinfo(const struct bi_record *);
122 extern int atari_parse_bootinfo(const struct bi_record *);
123 extern int mac_parse_bootinfo(const struct bi_record *);
124 extern int q40_parse_bootinfo(const struct bi_record *);
125 extern int bvme6000_parse_bootinfo(const struct bi_record *);
126 extern int mvme16x_parse_bootinfo(const struct bi_record *);
127 extern int mvme147_parse_bootinfo(const struct bi_record *);
128 extern int hp300_parse_bootinfo(const struct bi_record *);
129 extern int apollo_parse_bootinfo(const struct bi_record *);
131 extern void config_amiga(void);
132 extern void config_atari(void);
133 extern void config_mac(void);
134 extern void config_sun3(void);
135 extern void config_apollo(void);
136 extern void config_mvme147(void);
137 extern void config_mvme16x(void);
138 extern void config_bvme6000(void);
139 extern void config_hp300(void);
140 extern void config_q40(void);
141 extern void config_sun3x(void);
143 #define MASK_256K 0xfffc0000
145 extern void paging_init(void);
147 static void __init m68k_parse_bootinfo(const struct bi_record *record)
151 save_bootinfo(record);
153 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
155 const void *data = record->data;
156 uint16_t size = be16_to_cpu(record->size);
163 /* Already set up by head.S */
167 if (m68k_num_memory < NUM_MEMINFO) {
168 const struct mem_info *m = data;
169 m68k_memory[m68k_num_memory].addr =
170 be32_to_cpu(m->addr);
171 m68k_memory[m68k_num_memory].size =
172 be32_to_cpu(m->size);
175 pr_warn("%s: too many memory chunks\n",
181 const struct mem_info *m = data;
182 m68k_ramdisk.addr = be32_to_cpu(m->addr);
183 m68k_ramdisk.size = be32_to_cpu(m->size);
187 case BI_COMMAND_LINE:
188 strlcpy(m68k_command_line, data,
189 sizeof(m68k_command_line));
194 unknown = amiga_parse_bootinfo(record);
195 else if (MACH_IS_ATARI)
196 unknown = atari_parse_bootinfo(record);
197 else if (MACH_IS_MAC)
198 unknown = mac_parse_bootinfo(record);
199 else if (MACH_IS_Q40)
200 unknown = q40_parse_bootinfo(record);
201 else if (MACH_IS_BVME6000)
202 unknown = bvme6000_parse_bootinfo(record);
203 else if (MACH_IS_MVME16x)
204 unknown = mvme16x_parse_bootinfo(record);
205 else if (MACH_IS_MVME147)
206 unknown = mvme147_parse_bootinfo(record);
207 else if (MACH_IS_HP300)
208 unknown = hp300_parse_bootinfo(record);
209 else if (MACH_IS_APOLLO)
210 unknown = apollo_parse_bootinfo(record);
215 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
217 record = (struct bi_record *)((unsigned long)record + size);
220 m68k_realnum_memory = m68k_num_memory;
221 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
222 if (m68k_num_memory > 1) {
223 pr_warn("%s: ignoring last %i chunks of physical memory\n",
224 __func__, (m68k_num_memory - 1));
230 void __init setup_arch(char **cmdline_p)
236 /* The bootinfo is located right after the kernel */
237 if (!CPU_IS_COLDFIRE)
238 m68k_parse_bootinfo((const struct bi_record *)_end);
245 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
246 * be confused by software FPU emulation. BEWARE.
247 * We should really do our own FPU check at startup.
248 * [what do we do with buggy 68LC040s? if we have problems
249 * with them, we should add a test to check_bugs() below] */
250 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
251 /* clear the fpu if we have one */
252 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
253 volatile int zero = 0;
254 asm volatile ("frestore %0" : : "m" (zero));
261 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
263 if (((pcr >> 8) & 0xff) <= 5) {
264 pr_warn("Enabling workaround for errata I14\n");
265 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
266 : : "d" (pcr | 0x20));
270 init_mm.start_code = PAGE_OFFSET;
271 init_mm.end_code = (unsigned long)_etext;
272 init_mm.end_data = (unsigned long)_edata;
273 init_mm.brk = (unsigned long)_end;
275 #if defined(CONFIG_BOOTPARAM)
276 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
277 m68k_command_line[CL_SIZE - 1] = 0;
278 #endif /* CONFIG_BOOTPARAM */
279 process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
280 *cmdline_p = m68k_command_line;
281 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
285 #ifdef CONFIG_DUMMY_CONSOLE
286 conswitchp = &dummy_con;
289 switch (m68k_machtype) {
315 #ifdef CONFIG_MVME147
320 #ifdef CONFIG_MVME16x
325 #ifdef CONFIG_BVME6000
345 #ifdef CONFIG_COLDFIRE
352 panic("No configuration setup");
357 #ifdef CONFIG_NATFEAT
362 for (i = 1; i < m68k_num_memory; i++)
363 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
364 m68k_memory[i].size);
365 #ifdef CONFIG_BLK_DEV_INITRD
366 if (m68k_ramdisk.size) {
367 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
368 m68k_ramdisk.addr, m68k_ramdisk.size,
370 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
371 initrd_end = initrd_start + m68k_ramdisk.size;
372 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
378 atari_stram_reserve_pages((void *)availmem);
386 #endif /* !CONFIG_SUN3 */
388 /* set ISA defs early as possible */
389 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
391 isa_type = ISA_TYPE_Q40;
394 #ifdef CONFIG_AMIGA_PCMCIA
395 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
396 isa_type = ISA_TYPE_AG;
400 #ifdef CONFIG_ATARI_ROM_ISA
402 isa_type = ISA_TYPE_ENEC;
409 static int show_cpuinfo(struct seq_file *m, void *v)
411 const char *cpu, *mmu, *fpu;
412 unsigned long clockfreq, clockfactor;
414 #define LOOP_CYCLES_68020 (8)
415 #define LOOP_CYCLES_68030 (8)
416 #define LOOP_CYCLES_68040 (3)
417 #define LOOP_CYCLES_68060 (1)
418 #define LOOP_CYCLES_COLDFIRE (2)
422 clockfactor = LOOP_CYCLES_68020;
423 } else if (CPU_IS_030) {
425 clockfactor = LOOP_CYCLES_68030;
426 } else if (CPU_IS_040) {
428 clockfactor = LOOP_CYCLES_68040;
429 } else if (CPU_IS_060) {
431 clockfactor = LOOP_CYCLES_68060;
432 } else if (CPU_IS_COLDFIRE) {
434 clockfactor = LOOP_CYCLES_COLDFIRE;
440 #ifdef CONFIG_M68KFPU_EMU_ONLY
441 fpu = "none(soft float)";
443 if (m68k_fputype & FPU_68881)
445 else if (m68k_fputype & FPU_68882)
447 else if (m68k_fputype & FPU_68040)
449 else if (m68k_fputype & FPU_68060)
451 else if (m68k_fputype & FPU_SUNFPA)
453 else if (m68k_fputype & FPU_COLDFIRE)
459 if (m68k_mmutype & MMU_68851)
461 else if (m68k_mmutype & MMU_68030)
463 else if (m68k_mmutype & MMU_68040)
465 else if (m68k_mmutype & MMU_68060)
467 else if (m68k_mmutype & MMU_SUN3)
469 else if (m68k_mmutype & MMU_APOLLO)
471 else if (m68k_mmutype & MMU_COLDFIRE)
476 clockfreq = loops_per_jiffy * HZ * clockfactor;
478 seq_printf(m, "CPU:\t\t%s\n"
481 "Clocking:\t%lu.%1luMHz\n"
482 "BogoMips:\t%lu.%02lu\n"
483 "Calibration:\t%lu loops\n",
485 clockfreq/1000000,(clockfreq/100000)%10,
486 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
491 static void *c_start(struct seq_file *m, loff_t *pos)
493 return *pos < 1 ? (void *)1 : NULL;
495 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
500 static void c_stop(struct seq_file *m, void *v)
503 const struct seq_operations cpuinfo_op = {
507 .show = show_cpuinfo,
510 #ifdef CONFIG_PROC_HARDWARE
511 static int hardware_proc_show(struct seq_file *m, void *v)
518 mach_get_model(model);
520 strcpy(model, "Unknown m68k");
522 seq_printf(m, "Model:\t\t%s\n", model);
523 for (mem = 0, i = 0; i < m68k_num_memory; i++)
524 mem += m68k_memory[i].size;
525 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
527 if (mach_get_hardware_list)
528 mach_get_hardware_list(m);
533 static int hardware_proc_open(struct inode *inode, struct file *file)
535 return single_open(file, hardware_proc_show, NULL);
538 static const struct file_operations hardware_proc_fops = {
539 .open = hardware_proc_open,
542 .release = single_release,
545 static int __init proc_hardware_init(void)
547 proc_create("hardware", 0, NULL, &hardware_proc_fops);
550 module_init(proc_hardware_init);
553 void __init arch_cpu_finalize_init(void)
555 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
556 if (m68k_fputype == 0) {
557 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
558 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
559 pr_emerg("Upgrade your hardware or join the FPU "
560 "emulation project\n");
563 #endif /* !CONFIG_M68KFPU_EMU */
567 static int __init adb_probe_sync_enable (char *str) {
568 extern int __adb_probe_sync;
569 __adb_probe_sync = 1;
573 __setup("adb_sync", adb_probe_sync_enable);
574 #endif /* CONFIG_ADB */