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];
66 char m68k_debug_device[6] = "";
68 void (*mach_sched_init) (irqreturn_t (*handler)(int, void *, struct pt_regs *)) __initdata = NULL;
69 /* machine dependent irq functions */
70 void (*mach_init_IRQ) (void) __initdata = NULL;
71 void (*mach_get_model) (char *model);
72 int (*mach_get_hardware_list) (char *buffer);
73 /* machine dependent timer functions */
74 unsigned long (*mach_gettimeoffset) (void);
75 int (*mach_hwclk) (int, struct rtc_time*);
76 int (*mach_set_clock_mmss) (unsigned long);
77 unsigned int (*mach_get_ss)(void);
78 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
79 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
80 void (*mach_reset)( void );
81 void (*mach_halt)( void );
82 void (*mach_power_off)( void );
83 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
84 #ifdef CONFIG_HEARTBEAT
85 void (*mach_heartbeat) (int);
86 EXPORT_SYMBOL(mach_heartbeat);
88 #ifdef CONFIG_M68K_L2_CACHE
89 void (*mach_l2_flush) (int);
91 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
92 void (*mach_beep)(unsigned int, unsigned int);
94 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
97 EXPORT_SYMBOL(isa_type);
98 EXPORT_SYMBOL(isa_sex);
101 extern int amiga_parse_bootinfo(const struct bi_record *);
102 extern int atari_parse_bootinfo(const struct bi_record *);
103 extern int mac_parse_bootinfo(const struct bi_record *);
104 extern int q40_parse_bootinfo(const struct bi_record *);
105 extern int bvme6000_parse_bootinfo(const struct bi_record *);
106 extern int mvme16x_parse_bootinfo(const struct bi_record *);
107 extern int mvme147_parse_bootinfo(const struct bi_record *);
108 extern int hp300_parse_bootinfo(const struct bi_record *);
110 extern void config_amiga(void);
111 extern void config_atari(void);
112 extern void config_mac(void);
113 extern void config_sun3(void);
114 extern void config_apollo(void);
115 extern void config_mvme147(void);
116 extern void config_mvme16x(void);
117 extern void config_bvme6000(void);
118 extern void config_hp300(void);
119 extern void config_q40(void);
120 extern void config_sun3x(void);
122 extern void mac_debugging_short (int, short);
123 extern void mac_debugging_long (int, long);
125 #define MASK_256K 0xfffc0000
127 extern void paging_init(void);
129 static void __init m68k_parse_bootinfo(const struct bi_record *record)
131 while (record->tag != BI_LAST) {
133 const unsigned long *data = record->data;
134 switch (record->tag) {
139 /* Already set up by head.S */
143 if (m68k_num_memory < NUM_MEMINFO) {
144 m68k_memory[m68k_num_memory].addr = data[0];
145 m68k_memory[m68k_num_memory].size = data[1];
148 printk("m68k_parse_bootinfo: too many memory chunks\n");
152 m68k_ramdisk.addr = data[0];
153 m68k_ramdisk.size = data[1];
156 case BI_COMMAND_LINE:
157 strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line));
162 unknown = amiga_parse_bootinfo(record);
163 else if (MACH_IS_ATARI)
164 unknown = atari_parse_bootinfo(record);
165 else if (MACH_IS_MAC)
166 unknown = mac_parse_bootinfo(record);
167 else if (MACH_IS_Q40)
168 unknown = q40_parse_bootinfo(record);
169 else if (MACH_IS_BVME6000)
170 unknown = bvme6000_parse_bootinfo(record);
171 else if (MACH_IS_MVME16x)
172 unknown = mvme16x_parse_bootinfo(record);
173 else if (MACH_IS_MVME147)
174 unknown = mvme147_parse_bootinfo(record);
175 else if (MACH_IS_HP300)
176 unknown = hp300_parse_bootinfo(record);
181 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
183 record = (struct bi_record *)((unsigned long)record+record->size);
186 m68k_realnum_memory = m68k_num_memory;
187 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
188 if (m68k_num_memory > 1) {
189 printk("Ignoring last %i chunks of physical memory\n",
190 (m68k_num_memory - 1));
193 m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
197 void __init setup_arch(char **cmdline_p)
199 extern int _etext, _edata, _end;
201 unsigned long endmem, startmem;
206 /* The bootinfo is located right after the kernel bss */
207 m68k_parse_bootinfo((const struct bi_record *)&_end);
214 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
215 * be confused by software FPU emulation. BEWARE.
216 * We should really do our own FPU check at startup.
217 * [what do we do with buggy 68LC040s? if we have problems
218 * with them, we should add a test to check_bugs() below] */
219 #ifndef CONFIG_M68KFPU_EMU_ONLY
220 /* clear the fpu if we have one */
221 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
222 volatile int zero = 0;
223 asm __volatile__ ("frestore %0" : : "m" (zero));
230 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
232 if (((pcr >> 8) & 0xff) <= 5) {
233 printk("Enabling workaround for errata I14\n");
234 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
235 : : "d" (pcr | 0x20));
239 init_mm.start_code = PAGE_OFFSET;
240 init_mm.end_code = (unsigned long) &_etext;
241 init_mm.end_data = (unsigned long) &_edata;
242 init_mm.brk = (unsigned long) &_end;
244 *cmdline_p = m68k_command_line;
245 memcpy(saved_command_line, *cmdline_p, CL_SIZE);
247 /* Parse the command line for arch-specific options.
248 * For the m68k, this is currently only "debug=xxx" to enable printing
249 * certain kernel messages to some machine-specific device.
251 for( p = *cmdline_p; p && *p; ) {
253 if (!strncmp( p, "debug=", 6 )) {
254 strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) );
255 if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
259 /* This option must be parsed very early */
260 if (!strncmp( p, "switches=", 9 )) {
261 extern void atari_switches_setup( const char *, int );
262 atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
263 (q - (p+9)) : strlen(p+9) );
269 /* option processed, delete it */
270 if ((q = strchr( p, ' ' )))
275 if ((p = strchr( p, ' ' ))) ++p;
279 #ifdef CONFIG_DUMMY_CONSOLE
280 conswitchp = &dummy_con;
283 switch (m68k_machtype) {
309 #ifdef CONFIG_MVME147
314 #ifdef CONFIG_MVME16x
319 #ifdef CONFIG_BVME6000
340 panic ("No configuration setup");
344 startmem= m68k_memory[0].addr;
345 endmem = startmem + m68k_memory[0].size;
346 high_memory = (void *)PAGE_OFFSET;
347 for (i = 0; i < m68k_num_memory; i++) {
348 m68k_memory[i].size &= MASK_256K;
349 if (m68k_memory[i].addr < startmem)
350 startmem = m68k_memory[i].addr;
351 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
352 endmem = m68k_memory[i].addr+m68k_memory[i].size;
353 high_memory += m68k_memory[i].size;
356 availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
357 startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
359 for (i = 0; i < m68k_num_memory; i++)
360 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
362 reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
364 #ifdef CONFIG_BLK_DEV_INITRD
365 if (m68k_ramdisk.size) {
366 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
367 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
368 initrd_end = initrd_start + m68k_ramdisk.size;
369 printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
375 atari_stram_reserve_pages((void *)availmem);
383 #endif /* !CONFIG_SUN3 */
387 /* set ISA defs early as possible */
388 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
389 #if defined(CONFIG_Q40)
394 #elif defined(CONFIG_GG2)
395 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
399 #elif defined(CONFIG_AMIGA_PCMCIA)
400 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
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)
420 clockfactor = LOOP_CYCLES_68020;
421 } else if (CPU_IS_030) {
423 clockfactor = LOOP_CYCLES_68030;
424 } else if (CPU_IS_040) {
426 clockfactor = LOOP_CYCLES_68040;
427 } else if (CPU_IS_060) {
429 clockfactor = LOOP_CYCLES_68060;
435 #ifdef CONFIG_M68KFPU_EMU_ONLY
436 fpu="none(soft float)";
438 if (m68k_fputype & FPU_68881)
440 else if (m68k_fputype & FPU_68882)
442 else if (m68k_fputype & FPU_68040)
444 else if (m68k_fputype & FPU_68060)
446 else if (m68k_fputype & FPU_SUNFPA)
452 if (m68k_mmutype & MMU_68851)
454 else if (m68k_mmutype & MMU_68030)
456 else if (m68k_mmutype & MMU_68040)
458 else if (m68k_mmutype & MMU_68060)
460 else if (m68k_mmutype & MMU_SUN3)
462 else if (m68k_mmutype & MMU_APOLLO)
467 clockfreq = loops_per_jiffy*HZ*clockfactor;
469 seq_printf(m, "CPU:\t\t%s\n"
472 "Clocking:\t%lu.%1luMHz\n"
473 "BogoMips:\t%lu.%02lu\n"
474 "Calibration:\t%lu loops\n",
476 clockfreq/1000000,(clockfreq/100000)%10,
477 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
482 static void *c_start(struct seq_file *m, loff_t *pos)
484 return *pos < 1 ? (void *)1 : NULL;
486 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
491 static void c_stop(struct seq_file *m, void *v)
494 struct seq_operations cpuinfo_op = {
498 .show = show_cpuinfo,
501 int get_hardware_list(char *buffer)
509 mach_get_model(model);
511 strcpy(model, "Unknown m68k");
513 len += sprintf(buffer+len, "Model:\t\t%s\n", model);
514 for (mem = 0, i = 0; i < m68k_num_memory; i++)
515 mem += m68k_memory[i].size;
516 len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10);
518 if (mach_get_hardware_list)
519 len += mach_get_hardware_list(buffer+len);
524 void check_bugs(void)
526 #ifndef CONFIG_M68KFPU_EMU
527 if (m68k_fputype == 0) {
528 printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
529 "WHICH IS REQUIRED BY LINUX/M68K ***\n" );
530 printk( KERN_EMERG "Upgrade your hardware or join the FPU "
531 "emulation project\n" );
534 #endif /* !CONFIG_M68KFPU_EMU */