535 lines
12 KiB
C
535 lines
12 KiB
C
/*
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* linux/arch/m68k/kernel/setup.c
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*
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* Copyright (C) 1995 Hamish Macdonald
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*/
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/*
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* This file handles the architecture-dependent parts of system setup
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/fs.h>
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#include <linux/console.h>
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#include <linux/genhd.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/module.h>
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#include <linux/initrd.h>
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#include <asm/bootinfo.h>
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#include <asm/setup.h>
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#include <asm/fpu.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/machdep.h>
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#ifdef CONFIG_AMIGA
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#include <asm/amigahw.h>
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#endif
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#ifdef CONFIG_ATARI
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#include <asm/atarihw.h>
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#include <asm/atari_stram.h>
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#endif
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#ifdef CONFIG_SUN3X
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#include <asm/dvma.h>
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#endif
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#if !FPSTATESIZE || !NR_IRQS
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#warning No CPU/platform type selected, your kernel will not work!
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#warning Are you building an allnoconfig kernel?
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#endif
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unsigned long m68k_machtype;
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EXPORT_SYMBOL(m68k_machtype);
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unsigned long m68k_cputype;
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EXPORT_SYMBOL(m68k_cputype);
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unsigned long m68k_fputype;
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unsigned long m68k_mmutype;
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EXPORT_SYMBOL(m68k_mmutype);
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#ifdef CONFIG_VME
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unsigned long vme_brdtype;
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EXPORT_SYMBOL(vme_brdtype);
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#endif
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int m68k_is040or060;
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EXPORT_SYMBOL(m68k_is040or060);
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extern int end;
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extern unsigned long availmem;
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int m68k_num_memory;
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EXPORT_SYMBOL(m68k_num_memory);
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int m68k_realnum_memory;
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EXPORT_SYMBOL(m68k_realnum_memory);
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unsigned long m68k_memoffset;
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struct mem_info m68k_memory[NUM_MEMINFO];
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EXPORT_SYMBOL(m68k_memory);
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struct mem_info m68k_ramdisk;
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static char m68k_command_line[CL_SIZE];
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void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
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/* machine dependent irq functions */
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void (*mach_init_IRQ) (void) __initdata = NULL;
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void (*mach_get_model) (char *model);
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void (*mach_get_hardware_list) (struct seq_file *m);
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/* machine dependent timer functions */
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unsigned long (*mach_gettimeoffset) (void);
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int (*mach_hwclk) (int, struct rtc_time*);
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EXPORT_SYMBOL(mach_hwclk);
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int (*mach_set_clock_mmss) (unsigned long);
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unsigned int (*mach_get_ss)(void);
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int (*mach_get_rtc_pll)(struct rtc_pll_info *);
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int (*mach_set_rtc_pll)(struct rtc_pll_info *);
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EXPORT_SYMBOL(mach_get_ss);
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EXPORT_SYMBOL(mach_get_rtc_pll);
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EXPORT_SYMBOL(mach_set_rtc_pll);
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void (*mach_reset)( void );
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void (*mach_halt)( void );
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void (*mach_power_off)( void );
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long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
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#ifdef CONFIG_HEARTBEAT
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void (*mach_heartbeat) (int);
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EXPORT_SYMBOL(mach_heartbeat);
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#endif
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#ifdef CONFIG_M68K_L2_CACHE
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void (*mach_l2_flush) (int);
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#endif
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#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
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void (*mach_beep)(unsigned int, unsigned int);
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EXPORT_SYMBOL(mach_beep);
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#endif
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#if defined(CONFIG_ISA) && defined(MULTI_ISA)
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int isa_type;
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int isa_sex;
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EXPORT_SYMBOL(isa_type);
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EXPORT_SYMBOL(isa_sex);
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#endif
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extern int amiga_parse_bootinfo(const struct bi_record *);
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extern int atari_parse_bootinfo(const struct bi_record *);
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extern int mac_parse_bootinfo(const struct bi_record *);
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extern int q40_parse_bootinfo(const struct bi_record *);
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extern int bvme6000_parse_bootinfo(const struct bi_record *);
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extern int mvme16x_parse_bootinfo(const struct bi_record *);
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extern int mvme147_parse_bootinfo(const struct bi_record *);
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extern int hp300_parse_bootinfo(const struct bi_record *);
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extern int apollo_parse_bootinfo(const struct bi_record *);
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extern void config_amiga(void);
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extern void config_atari(void);
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extern void config_mac(void);
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extern void config_sun3(void);
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extern void config_apollo(void);
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extern void config_mvme147(void);
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extern void config_mvme16x(void);
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extern void config_bvme6000(void);
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extern void config_hp300(void);
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extern void config_q40(void);
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extern void config_sun3x(void);
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#define MASK_256K 0xfffc0000
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extern void paging_init(void);
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static void __init m68k_parse_bootinfo(const struct bi_record *record)
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{
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while (record->tag != BI_LAST) {
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int unknown = 0;
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const unsigned long *data = record->data;
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switch (record->tag) {
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case BI_MACHTYPE:
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case BI_CPUTYPE:
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case BI_FPUTYPE:
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case BI_MMUTYPE:
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/* Already set up by head.S */
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break;
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case BI_MEMCHUNK:
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if (m68k_num_memory < NUM_MEMINFO) {
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m68k_memory[m68k_num_memory].addr = data[0];
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m68k_memory[m68k_num_memory].size = data[1];
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m68k_num_memory++;
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} else
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printk("m68k_parse_bootinfo: too many memory chunks\n");
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break;
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case BI_RAMDISK:
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m68k_ramdisk.addr = data[0];
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m68k_ramdisk.size = data[1];
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break;
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case BI_COMMAND_LINE:
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strlcpy(m68k_command_line, (const char *)data,
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sizeof(m68k_command_line));
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break;
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default:
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if (MACH_IS_AMIGA)
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unknown = amiga_parse_bootinfo(record);
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else if (MACH_IS_ATARI)
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unknown = atari_parse_bootinfo(record);
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else if (MACH_IS_MAC)
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unknown = mac_parse_bootinfo(record);
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else if (MACH_IS_Q40)
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unknown = q40_parse_bootinfo(record);
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else if (MACH_IS_BVME6000)
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unknown = bvme6000_parse_bootinfo(record);
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else if (MACH_IS_MVME16x)
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unknown = mvme16x_parse_bootinfo(record);
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else if (MACH_IS_MVME147)
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unknown = mvme147_parse_bootinfo(record);
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else if (MACH_IS_HP300)
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unknown = hp300_parse_bootinfo(record);
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else if (MACH_IS_APOLLO)
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unknown = apollo_parse_bootinfo(record);
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else
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unknown = 1;
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}
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if (unknown)
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printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
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record->tag);
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record = (struct bi_record *)((unsigned long)record +
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record->size);
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}
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m68k_realnum_memory = m68k_num_memory;
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#ifdef CONFIG_SINGLE_MEMORY_CHUNK
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if (m68k_num_memory > 1) {
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printk("Ignoring last %i chunks of physical memory\n",
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(m68k_num_memory - 1));
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m68k_num_memory = 1;
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}
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#endif
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}
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void __init setup_arch(char **cmdline_p)
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{
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extern int _etext, _edata, _end;
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int i;
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/* The bootinfo is located right after the kernel bss */
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m68k_parse_bootinfo((const struct bi_record *)&_end);
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if (CPU_IS_040)
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m68k_is040or060 = 4;
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else if (CPU_IS_060)
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m68k_is040or060 = 6;
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/* FIXME: m68k_fputype is passed in by Penguin booter, which can
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* be confused by software FPU emulation. BEWARE.
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* We should really do our own FPU check at startup.
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* [what do we do with buggy 68LC040s? if we have problems
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* with them, we should add a test to check_bugs() below] */
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#ifndef CONFIG_M68KFPU_EMU_ONLY
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/* clear the fpu if we have one */
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if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
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volatile int zero = 0;
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asm volatile ("frestore %0" : : "m" (zero));
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}
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#endif
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if (CPU_IS_060) {
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u32 pcr;
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asm (".chip 68060; movec %%pcr,%0; .chip 68k"
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: "=d" (pcr));
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if (((pcr >> 8) & 0xff) <= 5) {
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printk("Enabling workaround for errata I14\n");
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asm (".chip 68060; movec %0,%%pcr; .chip 68k"
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: : "d" (pcr | 0x20));
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}
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}
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init_mm.start_code = PAGE_OFFSET;
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init_mm.end_code = (unsigned long) &_etext;
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init_mm.end_data = (unsigned long) &_edata;
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init_mm.brk = (unsigned long) &_end;
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*cmdline_p = m68k_command_line;
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memcpy(boot_command_line, *cmdline_p, CL_SIZE);
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parse_early_param();
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#endif
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switch (m68k_machtype) {
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#ifdef CONFIG_AMIGA
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case MACH_AMIGA:
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config_amiga();
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break;
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#endif
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#ifdef CONFIG_ATARI
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case MACH_ATARI:
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config_atari();
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break;
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#endif
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#ifdef CONFIG_MAC
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case MACH_MAC:
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config_mac();
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break;
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#endif
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#ifdef CONFIG_SUN3
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case MACH_SUN3:
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config_sun3();
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break;
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#endif
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#ifdef CONFIG_APOLLO
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case MACH_APOLLO:
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config_apollo();
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break;
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#endif
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#ifdef CONFIG_MVME147
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case MACH_MVME147:
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config_mvme147();
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break;
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#endif
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#ifdef CONFIG_MVME16x
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case MACH_MVME16x:
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config_mvme16x();
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break;
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#endif
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#ifdef CONFIG_BVME6000
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case MACH_BVME6000:
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config_bvme6000();
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break;
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#endif
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#ifdef CONFIG_HP300
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case MACH_HP300:
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config_hp300();
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break;
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#endif
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#ifdef CONFIG_Q40
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case MACH_Q40:
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config_q40();
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break;
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#endif
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#ifdef CONFIG_SUN3X
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case MACH_SUN3X:
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config_sun3x();
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break;
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#endif
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default:
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panic("No configuration setup");
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}
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paging_init();
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#ifndef CONFIG_SUN3
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for (i = 1; i < m68k_num_memory; i++)
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free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
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m68k_memory[i].size);
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#ifdef CONFIG_BLK_DEV_INITRD
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if (m68k_ramdisk.size) {
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reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
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m68k_ramdisk.addr, m68k_ramdisk.size,
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BOOTMEM_DEFAULT);
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initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
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initrd_end = initrd_start + m68k_ramdisk.size;
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printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
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}
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#endif
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#ifdef CONFIG_ATARI
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if (MACH_IS_ATARI)
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atari_stram_reserve_pages((void *)availmem);
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#endif
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#ifdef CONFIG_SUN3X
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if (MACH_IS_SUN3X) {
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dvma_init();
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}
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#endif
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#endif /* !CONFIG_SUN3 */
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/* set ISA defs early as possible */
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#if defined(CONFIG_ISA) && defined(MULTI_ISA)
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if (MACH_IS_Q40) {
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isa_type = ISA_TYPE_Q40;
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isa_sex = 0;
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}
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#ifdef CONFIG_GG2
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if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
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isa_type = ISA_TYPE_GG2;
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isa_sex = 0;
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}
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#endif
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#ifdef CONFIG_AMIGA_PCMCIA
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if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
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isa_type = ISA_TYPE_AG;
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isa_sex = 1;
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}
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#endif
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#endif
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}
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static int show_cpuinfo(struct seq_file *m, void *v)
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{
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const char *cpu, *mmu, *fpu;
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unsigned long clockfreq, clockfactor;
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#define LOOP_CYCLES_68020 (8)
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#define LOOP_CYCLES_68030 (8)
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#define LOOP_CYCLES_68040 (3)
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#define LOOP_CYCLES_68060 (1)
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if (CPU_IS_020) {
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cpu = "68020";
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clockfactor = LOOP_CYCLES_68020;
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} else if (CPU_IS_030) {
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cpu = "68030";
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clockfactor = LOOP_CYCLES_68030;
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} else if (CPU_IS_040) {
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cpu = "68040";
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clockfactor = LOOP_CYCLES_68040;
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} else if (CPU_IS_060) {
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cpu = "68060";
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clockfactor = LOOP_CYCLES_68060;
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} else {
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cpu = "680x0";
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clockfactor = 0;
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}
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#ifdef CONFIG_M68KFPU_EMU_ONLY
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fpu = "none(soft float)";
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#else
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if (m68k_fputype & FPU_68881)
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fpu = "68881";
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else if (m68k_fputype & FPU_68882)
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fpu = "68882";
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else if (m68k_fputype & FPU_68040)
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fpu = "68040";
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else if (m68k_fputype & FPU_68060)
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fpu = "68060";
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else if (m68k_fputype & FPU_SUNFPA)
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fpu = "Sun FPA";
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else
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fpu = "none";
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#endif
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if (m68k_mmutype & MMU_68851)
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mmu = "68851";
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else if (m68k_mmutype & MMU_68030)
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mmu = "68030";
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else if (m68k_mmutype & MMU_68040)
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mmu = "68040";
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else if (m68k_mmutype & MMU_68060)
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mmu = "68060";
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else if (m68k_mmutype & MMU_SUN3)
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mmu = "Sun-3";
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else if (m68k_mmutype & MMU_APOLLO)
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mmu = "Apollo";
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else
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mmu = "unknown";
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clockfreq = loops_per_jiffy * HZ * clockfactor;
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seq_printf(m, "CPU:\t\t%s\n"
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"MMU:\t\t%s\n"
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"FPU:\t\t%s\n"
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"Clocking:\t%lu.%1luMHz\n"
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"BogoMips:\t%lu.%02lu\n"
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"Calibration:\t%lu loops\n",
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cpu, mmu, fpu,
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clockfreq/1000000,(clockfreq/100000)%10,
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loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
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loops_per_jiffy);
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return 0;
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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return *pos < 1 ? (void *)1 : NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return NULL;
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}
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static void c_stop(struct seq_file *m, void *v)
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{
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}
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const struct seq_operations cpuinfo_op = {
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = show_cpuinfo,
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};
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#ifdef CONFIG_PROC_HARDWARE
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static int hardware_proc_show(struct seq_file *m, void *v)
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{
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char model[80];
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unsigned long mem;
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int i;
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if (mach_get_model)
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mach_get_model(model);
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else
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strcpy(model, "Unknown m68k");
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seq_printf(m, "Model:\t\t%s\n", model);
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for (mem = 0, i = 0; i < m68k_num_memory; i++)
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mem += m68k_memory[i].size;
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seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
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if (mach_get_hardware_list)
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mach_get_hardware_list(m);
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return 0;
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}
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static int hardware_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hardware_proc_show, NULL);
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}
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static const struct file_operations hardware_proc_fops = {
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.open = hardware_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int __init proc_hardware_init(void)
|
|
{
|
|
proc_create("hardware", 0, NULL, &hardware_proc_fops);
|
|
return 0;
|
|
}
|
|
module_init(proc_hardware_init);
|
|
#endif
|
|
|
|
void check_bugs(void)
|
|
{
|
|
#ifndef CONFIG_M68KFPU_EMU
|
|
if (m68k_fputype == 0) {
|
|
printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
|
|
"WHICH IS REQUIRED BY LINUX/M68K ***\n");
|
|
printk(KERN_EMERG "Upgrade your hardware or join the FPU "
|
|
"emulation project\n");
|
|
panic("no FPU");
|
|
}
|
|
#endif /* !CONFIG_M68KFPU_EMU */
|
|
}
|
|
|
|
#ifdef CONFIG_ADB
|
|
static int __init adb_probe_sync_enable (char *str) {
|
|
extern int __adb_probe_sync;
|
|
__adb_probe_sync = 1;
|
|
return 1;
|
|
}
|
|
|
|
__setup("adb_sync", adb_probe_sync_enable);
|
|
#endif /* CONFIG_ADB */
|