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>
14 #include <linux/sched.h>
15 #include <linux/delay.h>
16 #include <linux/interrupt.h>
18 #include <linux/console.h>
19 #include <linux/genhd.h>
20 #include <linux/errno.h>
21 #include <linux/string.h>
22 #include <linux/init.h>
23 #include <linux/bootmem.h>
24 #include <linux/proc_fs.h>
25 #include <linux/seq_file.h>
26 #include <linux/module.h>
27 #include <linux/initrd.h>
29 #include <asm/bootinfo.h>
30 #include <asm/byteorder.h>
31 #include <asm/sections.h>
32 #include <asm/setup.h>
36 #include <asm/machdep.h>
38 #include <asm/amigahw.h>
41 #include <asm/atarihw.h>
42 #include <asm/atari_stram.h>
47 #include <asm/natfeat.h>
49 #if !FPSTATESIZE || !NR_IRQS
50 #warning No CPU/platform type selected, your kernel will not work!
51 #warning Are you building an allnoconfig kernel?
54 unsigned long m68k_machtype;
55 EXPORT_SYMBOL(m68k_machtype);
56 unsigned long m68k_cputype;
57 EXPORT_SYMBOL(m68k_cputype);
58 unsigned long m68k_fputype;
59 unsigned long m68k_mmutype;
60 EXPORT_SYMBOL(m68k_mmutype);
62 unsigned long vme_brdtype;
63 EXPORT_SYMBOL(vme_brdtype);
67 EXPORT_SYMBOL(m68k_is040or060);
69 extern unsigned long availmem;
72 EXPORT_SYMBOL(m68k_num_memory);
73 int m68k_realnum_memory;
74 EXPORT_SYMBOL(m68k_realnum_memory);
75 unsigned long m68k_memoffset;
76 struct m68k_mem_info m68k_memory[NUM_MEMINFO];
77 EXPORT_SYMBOL(m68k_memory);
79 static struct m68k_mem_info m68k_ramdisk __initdata;
81 static char m68k_command_line[CL_SIZE] __initdata;
83 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
84 /* machine dependent irq functions */
85 void (*mach_init_IRQ) (void) __initdata = NULL;
86 void (*mach_get_model) (char *model);
87 void (*mach_get_hardware_list) (struct seq_file *m);
88 /* machine dependent timer functions */
89 int (*mach_hwclk) (int, struct rtc_time*);
90 EXPORT_SYMBOL(mach_hwclk);
91 int (*mach_set_clock_mmss) (unsigned long);
92 unsigned int (*mach_get_ss)(void);
93 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
94 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
95 EXPORT_SYMBOL(mach_get_ss);
96 EXPORT_SYMBOL(mach_get_rtc_pll);
97 EXPORT_SYMBOL(mach_set_rtc_pll);
98 void (*mach_reset)( void );
99 void (*mach_halt)( void );
100 void (*mach_power_off)( void );
101 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
102 #ifdef CONFIG_HEARTBEAT
103 void (*mach_heartbeat) (int);
104 EXPORT_SYMBOL(mach_heartbeat);
106 #ifdef CONFIG_M68K_L2_CACHE
107 void (*mach_l2_flush) (int);
109 #if IS_ENABLED(CONFIG_INPUT_M68K_BEEP)
110 void (*mach_beep)(unsigned int, unsigned int);
111 EXPORT_SYMBOL(mach_beep);
113 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
116 EXPORT_SYMBOL(isa_type);
117 EXPORT_SYMBOL(isa_sex);
120 extern int amiga_parse_bootinfo(const struct bi_record *);
121 extern int atari_parse_bootinfo(const struct bi_record *);
122 extern int mac_parse_bootinfo(const struct bi_record *);
123 extern int q40_parse_bootinfo(const struct bi_record *);
124 extern int bvme6000_parse_bootinfo(const struct bi_record *);
125 extern int mvme16x_parse_bootinfo(const struct bi_record *);
126 extern int mvme147_parse_bootinfo(const struct bi_record *);
127 extern int hp300_parse_bootinfo(const struct bi_record *);
128 extern int apollo_parse_bootinfo(const struct bi_record *);
130 extern void config_amiga(void);
131 extern void config_atari(void);
132 extern void config_mac(void);
133 extern void config_sun3(void);
134 extern void config_apollo(void);
135 extern void config_mvme147(void);
136 extern void config_mvme16x(void);
137 extern void config_bvme6000(void);
138 extern void config_hp300(void);
139 extern void config_q40(void);
140 extern void config_sun3x(void);
142 #define MASK_256K 0xfffc0000
144 extern void paging_init(void);
146 static void __init m68k_parse_bootinfo(const struct bi_record *record)
150 save_bootinfo(record);
152 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
154 const void *data = record->data;
155 uint16_t size = be16_to_cpu(record->size);
162 /* Already set up by head.S */
166 if (m68k_num_memory < NUM_MEMINFO) {
167 const struct mem_info *m = data;
168 m68k_memory[m68k_num_memory].addr =
169 be32_to_cpu(m->addr);
170 m68k_memory[m68k_num_memory].size =
171 be32_to_cpu(m->size);
174 pr_warn("%s: too many memory chunks\n",
180 const struct mem_info *m = data;
181 m68k_ramdisk.addr = be32_to_cpu(m->addr);
182 m68k_ramdisk.size = be32_to_cpu(m->size);
186 case BI_COMMAND_LINE:
187 strlcpy(m68k_command_line, data,
188 sizeof(m68k_command_line));
193 unknown = amiga_parse_bootinfo(record);
194 else if (MACH_IS_ATARI)
195 unknown = atari_parse_bootinfo(record);
196 else if (MACH_IS_MAC)
197 unknown = mac_parse_bootinfo(record);
198 else if (MACH_IS_Q40)
199 unknown = q40_parse_bootinfo(record);
200 else if (MACH_IS_BVME6000)
201 unknown = bvme6000_parse_bootinfo(record);
202 else if (MACH_IS_MVME16x)
203 unknown = mvme16x_parse_bootinfo(record);
204 else if (MACH_IS_MVME147)
205 unknown = mvme147_parse_bootinfo(record);
206 else if (MACH_IS_HP300)
207 unknown = hp300_parse_bootinfo(record);
208 else if (MACH_IS_APOLLO)
209 unknown = apollo_parse_bootinfo(record);
214 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
216 record = (struct bi_record *)((unsigned long)record + size);
219 m68k_realnum_memory = m68k_num_memory;
220 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
221 if (m68k_num_memory > 1) {
222 pr_warn("%s: ignoring last %i chunks of physical memory\n",
223 __func__, (m68k_num_memory - 1));
229 void __init setup_arch(char **cmdline_p)
235 /* The bootinfo is located right after the kernel */
236 if (!CPU_IS_COLDFIRE)
237 m68k_parse_bootinfo((const struct bi_record *)_end);
244 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
245 * be confused by software FPU emulation. BEWARE.
246 * We should really do our own FPU check at startup.
247 * [what do we do with buggy 68LC040s? if we have problems
248 * with them, we should add a test to check_bugs() below] */
249 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
250 /* clear the fpu if we have one */
251 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
252 volatile int zero = 0;
253 asm volatile ("frestore %0" : : "m" (zero));
260 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
262 if (((pcr >> 8) & 0xff) <= 5) {
263 pr_warn("Enabling workaround for errata I14\n");
264 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
265 : : "d" (pcr | 0x20));
269 init_mm.start_code = PAGE_OFFSET;
270 init_mm.end_code = (unsigned long)_etext;
271 init_mm.end_data = (unsigned long)_edata;
272 init_mm.brk = (unsigned long)_end;
274 #if defined(CONFIG_BOOTPARAM)
275 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
276 m68k_command_line[CL_SIZE - 1] = 0;
277 #endif /* CONFIG_BOOTPARAM */
278 process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
279 *cmdline_p = m68k_command_line;
280 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
284 #ifdef CONFIG_DUMMY_CONSOLE
285 conswitchp = &dummy_con;
288 switch (m68k_machtype) {
314 #ifdef CONFIG_MVME147
319 #ifdef CONFIG_MVME16x
324 #ifdef CONFIG_BVME6000
344 #ifdef CONFIG_COLDFIRE
351 panic("No configuration setup");
356 #ifdef CONFIG_NATFEAT
361 for (i = 1; i < m68k_num_memory; i++)
362 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
363 m68k_memory[i].size);
364 #ifdef CONFIG_BLK_DEV_INITRD
365 if (m68k_ramdisk.size) {
366 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
367 m68k_ramdisk.addr, m68k_ramdisk.size,
369 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
370 initrd_end = initrd_start + m68k_ramdisk.size;
371 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
377 atari_stram_reserve_pages((void *)availmem);
385 #endif /* !CONFIG_SUN3 */
387 /* set ISA defs early as possible */
388 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
390 isa_type = ISA_TYPE_Q40;
393 #ifdef CONFIG_AMIGA_PCMCIA
394 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
395 isa_type = ISA_TYPE_AG;
399 #ifdef CONFIG_ATARI_ROM_ISA
401 isa_type = ISA_TYPE_ENEC;
408 static int show_cpuinfo(struct seq_file *m, void *v)
410 const char *cpu, *mmu, *fpu;
411 unsigned long clockfreq, clockfactor;
413 #define LOOP_CYCLES_68020 (8)
414 #define LOOP_CYCLES_68030 (8)
415 #define LOOP_CYCLES_68040 (3)
416 #define LOOP_CYCLES_68060 (1)
417 #define LOOP_CYCLES_COLDFIRE (2)
421 clockfactor = LOOP_CYCLES_68020;
422 } else if (CPU_IS_030) {
424 clockfactor = LOOP_CYCLES_68030;
425 } else if (CPU_IS_040) {
427 clockfactor = LOOP_CYCLES_68040;
428 } else if (CPU_IS_060) {
430 clockfactor = LOOP_CYCLES_68060;
431 } else if (CPU_IS_COLDFIRE) {
433 clockfactor = LOOP_CYCLES_COLDFIRE;
439 #ifdef CONFIG_M68KFPU_EMU_ONLY
440 fpu = "none(soft float)";
442 if (m68k_fputype & FPU_68881)
444 else if (m68k_fputype & FPU_68882)
446 else if (m68k_fputype & FPU_68040)
448 else if (m68k_fputype & FPU_68060)
450 else if (m68k_fputype & FPU_SUNFPA)
452 else if (m68k_fputype & FPU_COLDFIRE)
458 if (m68k_mmutype & MMU_68851)
460 else if (m68k_mmutype & MMU_68030)
462 else if (m68k_mmutype & MMU_68040)
464 else if (m68k_mmutype & MMU_68060)
466 else if (m68k_mmutype & MMU_SUN3)
468 else if (m68k_mmutype & MMU_APOLLO)
470 else if (m68k_mmutype & MMU_COLDFIRE)
475 clockfreq = loops_per_jiffy * HZ * clockfactor;
477 seq_printf(m, "CPU:\t\t%s\n"
480 "Clocking:\t%lu.%1luMHz\n"
481 "BogoMips:\t%lu.%02lu\n"
482 "Calibration:\t%lu loops\n",
484 clockfreq/1000000,(clockfreq/100000)%10,
485 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
490 static void *c_start(struct seq_file *m, loff_t *pos)
492 return *pos < 1 ? (void *)1 : NULL;
494 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
499 static void c_stop(struct seq_file *m, void *v)
502 const struct seq_operations cpuinfo_op = {
506 .show = show_cpuinfo,
509 #ifdef CONFIG_PROC_HARDWARE
510 static int hardware_proc_show(struct seq_file *m, void *v)
517 mach_get_model(model);
519 strcpy(model, "Unknown m68k");
521 seq_printf(m, "Model:\t\t%s\n", model);
522 for (mem = 0, i = 0; i < m68k_num_memory; i++)
523 mem += m68k_memory[i].size;
524 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
526 if (mach_get_hardware_list)
527 mach_get_hardware_list(m);
532 static int hardware_proc_open(struct inode *inode, struct file *file)
534 return single_open(file, hardware_proc_show, NULL);
537 static const struct file_operations hardware_proc_fops = {
538 .open = hardware_proc_open,
541 .release = single_release,
544 static int __init proc_hardware_init(void)
546 proc_create("hardware", 0, NULL, &hardware_proc_fops);
549 module_init(proc_hardware_init);
552 void check_bugs(void)
554 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
555 if (m68k_fputype == 0) {
556 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
557 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
558 pr_emerg("Upgrade your hardware or join the FPU "
559 "emulation project\n");
562 #endif /* !CONFIG_M68KFPU_EMU */
566 static int __init adb_probe_sync_enable (char *str) {
567 extern int __adb_probe_sync;
568 __adb_probe_sync = 1;
572 __setup("adb_sync", adb_probe_sync_enable);
573 #endif /* CONFIG_ADB */