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 char m68k_debug_device[6] = "";
75 EXPORT_SYMBOL(m68k_debug_device);
77 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
78 /* machine dependent irq functions */
79 void (*mach_init_IRQ) (void) __initdata = NULL;
80 void (*mach_get_model) (char *model);
81 int (*mach_get_hardware_list) (char *buffer);
82 /* machine dependent timer functions */
83 unsigned long (*mach_gettimeoffset) (void);
84 int (*mach_hwclk) (int, struct rtc_time*);
85 EXPORT_SYMBOL(mach_hwclk);
86 int (*mach_set_clock_mmss) (unsigned long);
87 unsigned int (*mach_get_ss)(void);
88 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
89 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
90 EXPORT_SYMBOL(mach_get_ss);
91 EXPORT_SYMBOL(mach_get_rtc_pll);
92 EXPORT_SYMBOL(mach_set_rtc_pll);
93 void (*mach_reset)( void );
94 void (*mach_halt)( void );
95 void (*mach_power_off)( void );
96 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
97 #ifdef CONFIG_HEARTBEAT
98 void (*mach_heartbeat) (int);
99 EXPORT_SYMBOL(mach_heartbeat);
101 #ifdef CONFIG_M68K_L2_CACHE
102 void (*mach_l2_flush) (int);
104 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
105 void (*mach_beep)(unsigned int, unsigned int);
106 EXPORT_SYMBOL(mach_beep);
108 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
111 EXPORT_SYMBOL(isa_type);
112 EXPORT_SYMBOL(isa_sex);
115 extern int amiga_parse_bootinfo(const struct bi_record *);
116 extern int atari_parse_bootinfo(const struct bi_record *);
117 extern int mac_parse_bootinfo(const struct bi_record *);
118 extern int q40_parse_bootinfo(const struct bi_record *);
119 extern int bvme6000_parse_bootinfo(const struct bi_record *);
120 extern int mvme16x_parse_bootinfo(const struct bi_record *);
121 extern int mvme147_parse_bootinfo(const struct bi_record *);
122 extern int hp300_parse_bootinfo(const struct bi_record *);
124 extern void config_amiga(void);
125 extern void config_atari(void);
126 extern void config_mac(void);
127 extern void config_sun3(void);
128 extern void config_apollo(void);
129 extern void config_mvme147(void);
130 extern void config_mvme16x(void);
131 extern void config_bvme6000(void);
132 extern void config_hp300(void);
133 extern void config_q40(void);
134 extern void config_sun3x(void);
136 extern void mac_debugging_short (int, short);
137 extern void mac_debugging_long (int, long);
139 #define MASK_256K 0xfffc0000
141 extern void paging_init(void);
143 static void __init m68k_parse_bootinfo(const struct bi_record *record)
145 while (record->tag != BI_LAST) {
147 const unsigned long *data = record->data;
148 switch (record->tag) {
153 /* Already set up by head.S */
157 if (m68k_num_memory < NUM_MEMINFO) {
158 m68k_memory[m68k_num_memory].addr = data[0];
159 m68k_memory[m68k_num_memory].size = data[1];
162 printk("m68k_parse_bootinfo: too many memory chunks\n");
166 m68k_ramdisk.addr = data[0];
167 m68k_ramdisk.size = data[1];
170 case BI_COMMAND_LINE:
171 strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line));
176 unknown = amiga_parse_bootinfo(record);
177 else if (MACH_IS_ATARI)
178 unknown = atari_parse_bootinfo(record);
179 else if (MACH_IS_MAC)
180 unknown = mac_parse_bootinfo(record);
181 else if (MACH_IS_Q40)
182 unknown = q40_parse_bootinfo(record);
183 else if (MACH_IS_BVME6000)
184 unknown = bvme6000_parse_bootinfo(record);
185 else if (MACH_IS_MVME16x)
186 unknown = mvme16x_parse_bootinfo(record);
187 else if (MACH_IS_MVME147)
188 unknown = mvme147_parse_bootinfo(record);
189 else if (MACH_IS_HP300)
190 unknown = hp300_parse_bootinfo(record);
195 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
197 record = (struct bi_record *)((unsigned long)record+record->size);
200 m68k_realnum_memory = m68k_num_memory;
201 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
202 if (m68k_num_memory > 1) {
203 printk("Ignoring last %i chunks of physical memory\n",
204 (m68k_num_memory - 1));
207 m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
211 void __init setup_arch(char **cmdline_p)
213 extern int _etext, _edata, _end;
215 unsigned long endmem, startmem;
220 /* The bootinfo is located right after the kernel bss */
221 m68k_parse_bootinfo((const struct bi_record *)&_end);
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));
244 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
246 if (((pcr >> 8) & 0xff) <= 5) {
247 printk("Enabling workaround for errata I14\n");
248 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
249 : : "d" (pcr | 0x20));
253 init_mm.start_code = PAGE_OFFSET;
254 init_mm.end_code = (unsigned long) &_etext;
255 init_mm.end_data = (unsigned long) &_edata;
256 init_mm.brk = (unsigned long) &_end;
258 *cmdline_p = m68k_command_line;
259 memcpy(saved_command_line, *cmdline_p, CL_SIZE);
261 /* Parse the command line for arch-specific options.
262 * For the m68k, this is currently only "debug=xxx" to enable printing
263 * certain kernel messages to some machine-specific device.
265 for( p = *cmdline_p; p && *p; ) {
267 if (!strncmp( p, "debug=", 6 )) {
268 strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) );
269 if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
273 /* This option must be parsed very early */
274 if (!strncmp( p, "switches=", 9 )) {
275 extern void atari_switches_setup( const char *, int );
276 atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
277 (q - (p+9)) : strlen(p+9) );
283 /* option processed, delete it */
284 if ((q = strchr( p, ' ' )))
289 if ((p = strchr( p, ' ' ))) ++p;
293 #ifdef CONFIG_DUMMY_CONSOLE
294 conswitchp = &dummy_con;
297 switch (m68k_machtype) {
323 #ifdef CONFIG_MVME147
328 #ifdef CONFIG_MVME16x
333 #ifdef CONFIG_BVME6000
354 panic ("No configuration setup");
358 startmem= m68k_memory[0].addr;
359 endmem = startmem + m68k_memory[0].size;
360 high_memory = (void *)PAGE_OFFSET;
361 for (i = 0; i < m68k_num_memory; i++) {
362 m68k_memory[i].size &= MASK_256K;
363 if (m68k_memory[i].addr < startmem)
364 startmem = m68k_memory[i].addr;
365 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
366 endmem = m68k_memory[i].addr+m68k_memory[i].size;
367 high_memory += m68k_memory[i].size;
370 availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
371 startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
373 for (i = 0; i < m68k_num_memory; i++)
374 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
376 reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
378 #ifdef CONFIG_BLK_DEV_INITRD
379 if (m68k_ramdisk.size) {
380 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
381 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
382 initrd_end = initrd_start + m68k_ramdisk.size;
383 printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
389 atari_stram_reserve_pages((void *)availmem);
397 #endif /* !CONFIG_SUN3 */
401 /* set ISA defs early as possible */
402 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
403 #if defined(CONFIG_Q40)
408 #elif defined(CONFIG_GG2)
409 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
413 #elif defined(CONFIG_AMIGA_PCMCIA)
414 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
422 static int show_cpuinfo(struct seq_file *m, void *v)
424 const char *cpu, *mmu, *fpu;
425 unsigned long clockfreq, clockfactor;
427 #define LOOP_CYCLES_68020 (8)
428 #define LOOP_CYCLES_68030 (8)
429 #define LOOP_CYCLES_68040 (3)
430 #define LOOP_CYCLES_68060 (1)
434 clockfactor = LOOP_CYCLES_68020;
435 } else if (CPU_IS_030) {
437 clockfactor = LOOP_CYCLES_68030;
438 } else if (CPU_IS_040) {
440 clockfactor = LOOP_CYCLES_68040;
441 } else if (CPU_IS_060) {
443 clockfactor = LOOP_CYCLES_68060;
449 #ifdef CONFIG_M68KFPU_EMU_ONLY
450 fpu="none(soft float)";
452 if (m68k_fputype & FPU_68881)
454 else if (m68k_fputype & FPU_68882)
456 else if (m68k_fputype & FPU_68040)
458 else if (m68k_fputype & FPU_68060)
460 else if (m68k_fputype & FPU_SUNFPA)
466 if (m68k_mmutype & MMU_68851)
468 else if (m68k_mmutype & MMU_68030)
470 else if (m68k_mmutype & MMU_68040)
472 else if (m68k_mmutype & MMU_68060)
474 else if (m68k_mmutype & MMU_SUN3)
476 else if (m68k_mmutype & MMU_APOLLO)
481 clockfreq = loops_per_jiffy*HZ*clockfactor;
483 seq_printf(m, "CPU:\t\t%s\n"
486 "Clocking:\t%lu.%1luMHz\n"
487 "BogoMips:\t%lu.%02lu\n"
488 "Calibration:\t%lu loops\n",
490 clockfreq/1000000,(clockfreq/100000)%10,
491 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
496 static void *c_start(struct seq_file *m, loff_t *pos)
498 return *pos < 1 ? (void *)1 : NULL;
500 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
505 static void c_stop(struct seq_file *m, void *v)
508 struct seq_operations cpuinfo_op = {
512 .show = show_cpuinfo,
515 int get_hardware_list(char *buffer)
523 mach_get_model(model);
525 strcpy(model, "Unknown m68k");
527 len += sprintf(buffer+len, "Model:\t\t%s\n", model);
528 for (mem = 0, i = 0; i < m68k_num_memory; i++)
529 mem += m68k_memory[i].size;
530 len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10);
532 if (mach_get_hardware_list)
533 len += mach_get_hardware_list(buffer+len);
538 void check_bugs(void)
540 #ifndef CONFIG_M68KFPU_EMU
541 if (m68k_fputype == 0) {
542 printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
543 "WHICH IS REQUIRED BY LINUX/M68K ***\n" );
544 printk( KERN_EMERG "Upgrade your hardware or join the FPU "
545 "emulation project\n" );
548 #endif /* !CONFIG_M68KFPU_EMU */