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/seq_file.h>
24 #include <linux/module.h>
25 #include <linux/initrd.h>
27 #include <asm/bootinfo.h>
28 #include <asm/setup.h>
31 #include <asm/machdep.h>
33 #include <asm/amigahw.h>
36 #include <asm/atarihw.h>
37 #include <asm/atari_stram.h>
43 unsigned long m68k_machtype;
44 unsigned long m68k_cputype;
45 EXPORT_SYMBOL(m68k_machtype);
46 EXPORT_SYMBOL(m68k_cputype);
47 unsigned long m68k_fputype;
48 unsigned long m68k_mmutype;
50 unsigned long vme_brdtype;
51 EXPORT_SYMBOL(vme_brdtype);
55 EXPORT_SYMBOL(m68k_is040or060);
58 extern unsigned long availmem;
61 int m68k_realnum_memory;
62 EXPORT_SYMBOL(m68k_realnum_memory);
63 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
64 unsigned long m68k_memoffset;
65 EXPORT_SYMBOL(m68k_memoffset);
67 struct mem_info m68k_memory[NUM_MEMINFO];
68 EXPORT_SYMBOL(m68k_memory);
70 static struct mem_info m68k_ramdisk;
72 static char m68k_command_line[CL_SIZE];
74 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
75 /* machine dependent irq functions */
76 void (*mach_init_IRQ) (void) __initdata = NULL;
77 void (*mach_get_model) (char *model);
78 int (*mach_get_hardware_list) (char *buffer);
79 /* machine dependent timer functions */
80 unsigned long (*mach_gettimeoffset) (void);
81 int (*mach_hwclk) (int, struct rtc_time*);
82 EXPORT_SYMBOL(mach_hwclk);
83 int (*mach_set_clock_mmss) (unsigned long);
84 unsigned int (*mach_get_ss)(void);
85 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
86 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
87 EXPORT_SYMBOL(mach_get_ss);
88 EXPORT_SYMBOL(mach_get_rtc_pll);
89 EXPORT_SYMBOL(mach_set_rtc_pll);
90 void (*mach_reset)( void );
91 void (*mach_halt)( void );
92 void (*mach_power_off)( void );
93 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
94 #ifdef CONFIG_HEARTBEAT
95 void (*mach_heartbeat) (int);
96 EXPORT_SYMBOL(mach_heartbeat);
98 #ifdef CONFIG_M68K_L2_CACHE
99 void (*mach_l2_flush) (int);
101 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
102 void (*mach_beep)(unsigned int, unsigned int);
103 EXPORT_SYMBOL(mach_beep);
105 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
108 EXPORT_SYMBOL(isa_type);
109 EXPORT_SYMBOL(isa_sex);
112 extern int amiga_parse_bootinfo(const struct bi_record *);
113 extern int atari_parse_bootinfo(const struct bi_record *);
114 extern int mac_parse_bootinfo(const struct bi_record *);
115 extern int q40_parse_bootinfo(const struct bi_record *);
116 extern int bvme6000_parse_bootinfo(const struct bi_record *);
117 extern int mvme16x_parse_bootinfo(const struct bi_record *);
118 extern int mvme147_parse_bootinfo(const struct bi_record *);
119 extern int hp300_parse_bootinfo(const struct bi_record *);
121 extern void config_amiga(void);
122 extern void config_atari(void);
123 extern void config_mac(void);
124 extern void config_sun3(void);
125 extern void config_apollo(void);
126 extern void config_mvme147(void);
127 extern void config_mvme16x(void);
128 extern void config_bvme6000(void);
129 extern void config_hp300(void);
130 extern void config_q40(void);
131 extern void config_sun3x(void);
133 #define MASK_256K 0xfffc0000
135 extern void paging_init(void);
137 static void __init m68k_parse_bootinfo(const struct bi_record *record)
139 while (record->tag != BI_LAST) {
141 const unsigned long *data = record->data;
143 switch (record->tag) {
148 /* Already set up by head.S */
152 if (m68k_num_memory < NUM_MEMINFO) {
153 m68k_memory[m68k_num_memory].addr = data[0];
154 m68k_memory[m68k_num_memory].size = data[1];
157 printk("m68k_parse_bootinfo: too many memory chunks\n");
161 m68k_ramdisk.addr = data[0];
162 m68k_ramdisk.size = data[1];
165 case BI_COMMAND_LINE:
166 strlcpy(m68k_command_line, (const char *)data,
167 sizeof(m68k_command_line));
172 unknown = amiga_parse_bootinfo(record);
173 else if (MACH_IS_ATARI)
174 unknown = atari_parse_bootinfo(record);
175 else if (MACH_IS_MAC)
176 unknown = mac_parse_bootinfo(record);
177 else if (MACH_IS_Q40)
178 unknown = q40_parse_bootinfo(record);
179 else if (MACH_IS_BVME6000)
180 unknown = bvme6000_parse_bootinfo(record);
181 else if (MACH_IS_MVME16x)
182 unknown = mvme16x_parse_bootinfo(record);
183 else if (MACH_IS_MVME147)
184 unknown = mvme147_parse_bootinfo(record);
185 else if (MACH_IS_HP300)
186 unknown = hp300_parse_bootinfo(record);
191 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
193 record = (struct bi_record *)((unsigned long)record +
197 m68k_realnum_memory = m68k_num_memory;
198 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
199 if (m68k_num_memory > 1) {
200 printk("Ignoring last %i chunks of physical memory\n",
201 (m68k_num_memory - 1));
204 m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
208 void __init setup_arch(char **cmdline_p)
210 extern int _etext, _edata, _end;
212 unsigned long endmem, startmem;
216 /* The bootinfo is located right after the kernel bss */
217 m68k_parse_bootinfo((const struct bi_record *)&_end);
224 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
225 * be confused by software FPU emulation. BEWARE.
226 * We should really do our own FPU check at startup.
227 * [what do we do with buggy 68LC040s? if we have problems
228 * with them, we should add a test to check_bugs() below] */
229 #ifndef CONFIG_M68KFPU_EMU_ONLY
230 /* clear the fpu if we have one */
231 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
232 volatile int zero = 0;
233 asm volatile ("frestore %0" : : "m" (zero));
240 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
242 if (((pcr >> 8) & 0xff) <= 5) {
243 printk("Enabling workaround for errata I14\n");
244 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
245 : : "d" (pcr | 0x20));
249 init_mm.start_code = PAGE_OFFSET;
250 init_mm.end_code = (unsigned long) &_etext;
251 init_mm.end_data = (unsigned long) &_edata;
252 init_mm.brk = (unsigned long) &_end;
254 *cmdline_p = m68k_command_line;
255 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
259 #ifdef CONFIG_DUMMY_CONSOLE
260 conswitchp = &dummy_con;
263 switch (m68k_machtype) {
289 #ifdef CONFIG_MVME147
294 #ifdef CONFIG_MVME16x
299 #ifdef CONFIG_BVME6000
320 panic("No configuration setup");
324 startmem= m68k_memory[0].addr;
325 endmem = startmem + m68k_memory[0].size;
326 high_memory = (void *)PAGE_OFFSET;
327 for (i = 0; i < m68k_num_memory; i++) {
328 m68k_memory[i].size &= MASK_256K;
329 if (m68k_memory[i].addr < startmem)
330 startmem = m68k_memory[i].addr;
331 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
332 endmem = m68k_memory[i].addr+m68k_memory[i].size;
333 high_memory += m68k_memory[i].size;
336 availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
337 startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
339 for (i = 0; i < m68k_num_memory; i++)
340 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
342 reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
344 #ifdef CONFIG_BLK_DEV_INITRD
345 if (m68k_ramdisk.size) {
346 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
347 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
348 initrd_end = initrd_start + m68k_ramdisk.size;
349 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
355 atari_stram_reserve_pages((void *)availmem);
363 #endif /* !CONFIG_SUN3 */
367 /* set ISA defs early as possible */
368 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
369 #if defined(CONFIG_Q40)
374 #elif defined(CONFIG_GG2)
375 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
379 #elif defined(CONFIG_AMIGA_PCMCIA)
380 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
388 static int show_cpuinfo(struct seq_file *m, void *v)
390 const char *cpu, *mmu, *fpu;
391 unsigned long clockfreq, clockfactor;
393 #define LOOP_CYCLES_68020 (8)
394 #define LOOP_CYCLES_68030 (8)
395 #define LOOP_CYCLES_68040 (3)
396 #define LOOP_CYCLES_68060 (1)
400 clockfactor = LOOP_CYCLES_68020;
401 } else if (CPU_IS_030) {
403 clockfactor = LOOP_CYCLES_68030;
404 } else if (CPU_IS_040) {
406 clockfactor = LOOP_CYCLES_68040;
407 } else if (CPU_IS_060) {
409 clockfactor = LOOP_CYCLES_68060;
415 #ifdef CONFIG_M68KFPU_EMU_ONLY
416 fpu = "none(soft float)";
418 if (m68k_fputype & FPU_68881)
420 else if (m68k_fputype & FPU_68882)
422 else if (m68k_fputype & FPU_68040)
424 else if (m68k_fputype & FPU_68060)
426 else if (m68k_fputype & FPU_SUNFPA)
432 if (m68k_mmutype & MMU_68851)
434 else if (m68k_mmutype & MMU_68030)
436 else if (m68k_mmutype & MMU_68040)
438 else if (m68k_mmutype & MMU_68060)
440 else if (m68k_mmutype & MMU_SUN3)
442 else if (m68k_mmutype & MMU_APOLLO)
447 clockfreq = loops_per_jiffy * HZ * clockfactor;
449 seq_printf(m, "CPU:\t\t%s\n"
452 "Clocking:\t%lu.%1luMHz\n"
453 "BogoMips:\t%lu.%02lu\n"
454 "Calibration:\t%lu loops\n",
456 clockfreq/1000000,(clockfreq/100000)%10,
457 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
462 static void *c_start(struct seq_file *m, loff_t *pos)
464 return *pos < 1 ? (void *)1 : NULL;
466 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
471 static void c_stop(struct seq_file *m, void *v)
474 struct seq_operations cpuinfo_op = {
478 .show = show_cpuinfo,
481 int get_hardware_list(char *buffer)
489 mach_get_model(model);
491 strcpy(model, "Unknown m68k");
493 len += sprintf(buffer + len, "Model:\t\t%s\n", model);
494 for (mem = 0, i = 0; i < m68k_num_memory; i++)
495 mem += m68k_memory[i].size;
496 len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10);
498 if (mach_get_hardware_list)
499 len += mach_get_hardware_list(buffer + len);
504 void check_bugs(void)
506 #ifndef CONFIG_M68KFPU_EMU
507 if (m68k_fputype == 0) {
508 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
509 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
510 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
511 "emulation project\n");
514 #endif /* !CONFIG_M68KFPU_EMU */
518 static int __init adb_probe_sync_enable (char *str) {
519 extern int __adb_probe_sync;
520 __adb_probe_sync = 1;
524 __setup("adb_sync", adb_probe_sync_enable);
525 #endif /* CONFIG_ADB */