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/config.h>
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/seq_file.h>
25 #include <linux/module.h>
26 #include <linux/initrd.h>
28 #include <asm/bootinfo.h>
29 #include <asm/setup.h>
32 #include <asm/machdep.h>
34 #include <asm/amigahw.h>
37 #include <asm/atarihw.h>
38 #include <asm/atari_stram.h>
44 unsigned long m68k_machtype;
45 unsigned long m68k_cputype;
46 unsigned long m68k_fputype;
47 unsigned long m68k_mmutype;
49 unsigned long vme_brdtype;
55 extern unsigned long availmem;
58 int m68k_realnum_memory;
59 unsigned long m68k_memoffset;
60 struct mem_info m68k_memory[NUM_MEMINFO];
62 static struct mem_info m68k_ramdisk;
64 static char m68k_command_line[CL_SIZE];
65 char saved_command_line[CL_SIZE];
67 char m68k_debug_device[6] = "";
69 void (*mach_sched_init) (irqreturn_t (*handler)(int, void *, struct pt_regs *)) __initdata = NULL;
70 /* machine dependent irq functions */
71 void (*mach_init_IRQ) (void) __initdata = NULL;
72 irqreturn_t (*(*mach_default_handler)[]) (int, void *, struct pt_regs *);
73 void (*mach_get_model) (char *model);
74 int (*mach_get_hardware_list) (char *buffer);
75 int (*mach_get_irq_list) (struct seq_file *, void *);
76 irqreturn_t (*mach_process_int) (int, struct pt_regs *);
77 /* machine dependent timer functions */
78 unsigned long (*mach_gettimeoffset) (void);
79 int (*mach_hwclk) (int, struct rtc_time*);
80 int (*mach_set_clock_mmss) (unsigned long);
81 unsigned int (*mach_get_ss)(void);
82 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
83 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
84 void (*mach_reset)( void );
85 void (*mach_halt)( void );
86 void (*mach_power_off)( void );
87 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
88 #if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
89 void (*mach_floppy_setup) (char *, int *) __initdata = NULL;
91 #ifdef CONFIG_HEARTBEAT
92 void (*mach_heartbeat) (int);
93 EXPORT_SYMBOL(mach_heartbeat);
95 #ifdef CONFIG_M68K_L2_CACHE
96 void (*mach_l2_flush) (int);
98 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
99 void (*mach_beep)(unsigned int, unsigned int);
101 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
106 extern int amiga_parse_bootinfo(const struct bi_record *);
107 extern int atari_parse_bootinfo(const struct bi_record *);
108 extern int mac_parse_bootinfo(const struct bi_record *);
109 extern int q40_parse_bootinfo(const struct bi_record *);
110 extern int bvme6000_parse_bootinfo(const struct bi_record *);
111 extern int mvme16x_parse_bootinfo(const struct bi_record *);
112 extern int mvme147_parse_bootinfo(const struct bi_record *);
114 extern void config_amiga(void);
115 extern void config_atari(void);
116 extern void config_mac(void);
117 extern void config_sun3(void);
118 extern void config_apollo(void);
119 extern void config_mvme147(void);
120 extern void config_mvme16x(void);
121 extern void config_bvme6000(void);
122 extern void config_hp300(void);
123 extern void config_q40(void);
124 extern void config_sun3x(void);
126 extern void mac_debugging_short (int, short);
127 extern void mac_debugging_long (int, long);
129 #define MASK_256K 0xfffc0000
131 extern void paging_init(void);
133 static void __init m68k_parse_bootinfo(const struct bi_record *record)
135 while (record->tag != BI_LAST) {
137 const unsigned long *data = record->data;
138 switch (record->tag) {
143 /* Already set up by head.S */
147 if (m68k_num_memory < NUM_MEMINFO) {
148 m68k_memory[m68k_num_memory].addr = data[0];
149 m68k_memory[m68k_num_memory].size = data[1];
152 printk("m68k_parse_bootinfo: too many memory chunks\n");
156 m68k_ramdisk.addr = data[0];
157 m68k_ramdisk.size = data[1];
160 case BI_COMMAND_LINE:
161 strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line));
166 unknown = amiga_parse_bootinfo(record);
167 else if (MACH_IS_ATARI)
168 unknown = atari_parse_bootinfo(record);
169 else if (MACH_IS_MAC)
170 unknown = mac_parse_bootinfo(record);
171 else if (MACH_IS_Q40)
172 unknown = q40_parse_bootinfo(record);
173 else if (MACH_IS_BVME6000)
174 unknown = bvme6000_parse_bootinfo(record);
175 else if (MACH_IS_MVME16x)
176 unknown = mvme16x_parse_bootinfo(record);
177 else if (MACH_IS_MVME147)
178 unknown = mvme147_parse_bootinfo(record);
183 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
185 record = (struct bi_record *)((unsigned long)record+record->size);
188 m68k_realnum_memory = m68k_num_memory;
189 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
190 if (m68k_num_memory > 1) {
191 printk("Ignoring last %i chunks of physical memory\n",
192 (m68k_num_memory - 1));
195 m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
199 void __init setup_arch(char **cmdline_p)
201 extern int _etext, _edata, _end;
203 unsigned long endmem, startmem;
208 if (!MACH_IS_HP300) {
209 /* The bootinfo is located right after the kernel bss */
210 m68k_parse_bootinfo((const struct bi_record *)&_end);
212 /* FIXME HP300 doesn't use bootinfo yet */
213 extern unsigned long hp300_phys_ram_base;
214 unsigned long hp300_mem_size = 0xffffffff-hp300_phys_ram_base;
215 m68k_cputype = CPU_68030;
216 m68k_fputype = FPU_68882;
217 m68k_memory[0].addr = hp300_phys_ram_base;
218 /* 0.5M fudge factor */
219 m68k_memory[0].size = hp300_mem_size-512*1024;
228 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
229 * be confused by software FPU emulation. BEWARE.
230 * We should really do our own FPU check at startup.
231 * [what do we do with buggy 68LC040s? if we have problems
232 * with them, we should add a test to check_bugs() below] */
233 #ifndef CONFIG_M68KFPU_EMU_ONLY
234 /* clear the fpu if we have one */
235 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
236 volatile int zero = 0;
237 asm __volatile__ ("frestore %0" : : "m" (zero));
241 init_mm.start_code = PAGE_OFFSET;
242 init_mm.end_code = (unsigned long) &_etext;
243 init_mm.end_data = (unsigned long) &_edata;
244 init_mm.brk = (unsigned long) &_end;
246 *cmdline_p = m68k_command_line;
247 memcpy(saved_command_line, *cmdline_p, CL_SIZE);
249 /* Parse the command line for arch-specific options.
250 * For the m68k, this is currently only "debug=xxx" to enable printing
251 * certain kernel messages to some machine-specific device.
253 for( p = *cmdline_p; p && *p; ) {
255 if (!strncmp( p, "debug=", 6 )) {
256 strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) );
257 if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
261 /* This option must be parsed very early */
262 if (!strncmp( p, "switches=", 9 )) {
263 extern void atari_switches_setup( const char *, int );
264 atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
265 (q - (p+9)) : strlen(p+9) );
271 /* option processed, delete it */
272 if ((q = strchr( p, ' ' )))
277 if ((p = strchr( p, ' ' ))) ++p;
281 switch (m68k_machtype) {
307 #ifdef CONFIG_MVME147
312 #ifdef CONFIG_MVME16x
317 #ifdef CONFIG_BVME6000
338 panic ("No configuration setup");
342 startmem= m68k_memory[0].addr;
343 endmem = startmem + m68k_memory[0].size;
344 high_memory = PAGE_OFFSET;
345 for (i = 0; i < m68k_num_memory; i++) {
346 m68k_memory[i].size &= MASK_256K;
347 if (m68k_memory[i].addr < startmem)
348 startmem = m68k_memory[i].addr;
349 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
350 endmem = m68k_memory[i].addr+m68k_memory[i].size;
351 high_memory += m68k_memory[i].size;
354 availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
355 startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
357 for (i = 0; i < m68k_num_memory; i++)
358 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
360 reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
362 #ifdef CONFIG_BLK_DEV_INITRD
363 if (m68k_ramdisk.size) {
364 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
365 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
366 initrd_end = initrd_start + m68k_ramdisk.size;
367 printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
373 atari_stram_reserve_pages((void *)availmem);
381 #endif /* !CONFIG_SUN3 */
385 /* set ISA defs early as possible */
386 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
387 #if defined(CONFIG_Q40)
392 #elif defined(CONFIG_GG2)
393 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
397 #elif defined(CONFIG_AMIGA_PCMCIA)
398 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
406 static int show_cpuinfo(struct seq_file *m, void *v)
408 const char *cpu, *mmu, *fpu;
409 unsigned long clockfreq, clockfactor;
411 #define LOOP_CYCLES_68020 (8)
412 #define LOOP_CYCLES_68030 (8)
413 #define LOOP_CYCLES_68040 (3)
414 #define LOOP_CYCLES_68060 (1)
418 clockfactor = LOOP_CYCLES_68020;
419 } else if (CPU_IS_030) {
421 clockfactor = LOOP_CYCLES_68030;
422 } else if (CPU_IS_040) {
424 clockfactor = LOOP_CYCLES_68040;
425 } else if (CPU_IS_060) {
427 clockfactor = LOOP_CYCLES_68060;
433 #ifdef CONFIG_M68KFPU_EMU_ONLY
434 fpu="none(soft float)";
436 if (m68k_fputype & FPU_68881)
438 else if (m68k_fputype & FPU_68882)
440 else if (m68k_fputype & FPU_68040)
442 else if (m68k_fputype & FPU_68060)
444 else if (m68k_fputype & FPU_SUNFPA)
450 if (m68k_mmutype & MMU_68851)
452 else if (m68k_mmutype & MMU_68030)
454 else if (m68k_mmutype & MMU_68040)
456 else if (m68k_mmutype & MMU_68060)
458 else if (m68k_mmutype & MMU_SUN3)
460 else if (m68k_mmutype & MMU_APOLLO)
465 clockfreq = loops_per_jiffy*HZ*clockfactor;
467 seq_printf(m, "CPU:\t\t%s\n"
470 "Clocking:\t%lu.%1luMHz\n"
471 "BogoMips:\t%lu.%02lu\n"
472 "Calibration:\t%lu loops\n",
474 clockfreq/1000000,(clockfreq/100000)%10,
475 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
480 static void *c_start(struct seq_file *m, loff_t *pos)
482 return *pos < 1 ? (void *)1 : NULL;
484 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
489 static void c_stop(struct seq_file *m, void *v)
492 struct seq_operations cpuinfo_op = {
496 .show = show_cpuinfo,
499 int get_hardware_list(char *buffer)
507 mach_get_model(model);
509 strcpy(model, "Unknown m68k");
511 len += sprintf(buffer+len, "Model:\t\t%s\n", model);
512 for (mem = 0, i = 0; i < m68k_num_memory; i++)
513 mem += m68k_memory[i].size;
514 len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10);
516 if (mach_get_hardware_list)
517 len += mach_get_hardware_list(buffer+len);
523 #if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
524 void __init floppy_setup(char *str, int *ints)
526 if (mach_floppy_setup)
527 mach_floppy_setup (str, ints);
532 void check_bugs(void)
534 #ifndef CONFIG_M68KFPU_EMU
535 if (m68k_fputype == 0) {
536 printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
537 "WHICH IS REQUIRED BY LINUX/M68K ***\n" );
538 printk( KERN_EMERG "Upgrade your hardware or join the FPU "
539 "emulation project\n" );
543 #endif /* CONFIG_SUN3 */