setup.c
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上传日期:2013-02-24
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文件大小:14k
- /*
- * linux/arch/m68k/kernel/setup.c
- *
- * Copyright (C) 1995 Hamish Macdonald
- */
- /*
- * This file handles the architecture-dependent parts of system setup
- */
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/mm.h>
- #include <linux/sched.h>
- #include <linux/delay.h>
- #include <linux/interrupt.h>
- #include <linux/fs.h>
- #include <linux/console.h>
- #include <linux/genhd.h>
- #include <linux/errno.h>
- #include <linux/string.h>
- #include <linux/init.h>
- #include <linux/bootmem.h>
- #include <linux/module.h>
- #include <asm/bootinfo.h>
- #include <asm/setup.h>
- #include <asm/irq.h>
- #include <asm/io.h>
- #include <asm/machdep.h>
- #ifdef CONFIG_AMIGA
- #include <asm/amigahw.h>
- #endif
- #ifdef CONFIG_ATARI
- #include <asm/atarihw.h>
- #endif
- #ifdef CONFIG_SUN3X
- #include <asm/dvma.h>
- extern void sun_serial_setup(void);
- #endif
- #ifdef CONFIG_BLK_DEV_INITRD
- #include <linux/blk.h>
- #endif
- unsigned long m68k_machtype;
- unsigned long m68k_cputype;
- unsigned long m68k_fputype;
- unsigned long m68k_mmutype;
- #ifdef CONFIG_VME
- unsigned long vme_brdtype;
- #endif
- int m68k_is040or060 = 0;
- extern int end;
- extern unsigned long availmem;
- int m68k_num_memory = 0;
- int m68k_realnum_memory = 0;
- unsigned long m68k_memoffset;
- struct mem_info m68k_memory[NUM_MEMINFO];
- static struct mem_info m68k_ramdisk = { 0, 0 };
- static char m68k_command_line[CL_SIZE];
- char saved_command_line[CL_SIZE];
- char m68k_debug_device[6] = "";
- void (*mach_sched_init) (void (*handler)(int, void *, struct pt_regs *)) __initdata = NULL;
- /* machine dependent keyboard functions */
- int (*mach_keyb_init) (void) __initdata = NULL;
- int (*mach_kbdrate) (struct kbd_repeat *) = NULL;
- void (*mach_kbd_leds) (unsigned int) = NULL;
- int (*mach_kbd_translate)(unsigned char scancode, unsigned char *keycode, char raw_mode) = NULL;
- unsigned int SYSRQ_KEY;
- /* machine dependent irq functions */
- void (*mach_init_IRQ) (void) __initdata = NULL;
- void (*(*mach_default_handler)[]) (int, void *, struct pt_regs *) = NULL;
- void (*mach_get_model) (char *model) = NULL;
- int (*mach_get_hardware_list) (char *buffer) = NULL;
- int (*mach_get_irq_list) (char *) = NULL;
- void (*mach_process_int) (int, struct pt_regs *) = NULL;
- /* machine dependent timer functions */
- unsigned long (*mach_gettimeoffset) (void);
- void (*mach_gettod) (int*, int*, int*, int*, int*, int*);
- int (*mach_hwclk) (int, struct hwclk_time*) = NULL;
- int (*mach_set_clock_mmss) (unsigned long) = NULL;
- void (*mach_reset)( void );
- void (*mach_halt)( void ) = NULL;
- void (*mach_power_off)( void ) = NULL;
- long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
- #if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
- void (*mach_floppy_setup) (char *, int *) __initdata = NULL;
- void (*mach_floppy_eject) (void) = NULL;
- #endif
- #ifdef CONFIG_HEARTBEAT
- void (*mach_heartbeat) (int) = NULL;
- EXPORT_SYMBOL(mach_heartbeat);
- #endif
- #ifdef CONFIG_M68K_L2_CACHE
- void (*mach_l2_flush) (int) = NULL;
- #endif
- #ifdef CONFIG_MAGIC_SYSRQ
- int mach_sysrq_key = -1;
- int mach_sysrq_shift_state = 0;
- int mach_sysrq_shift_mask = 0;
- char *mach_sysrq_xlate = NULL;
- #endif
- #if defined(CONFIG_ISA)
- int isa_type;
- int isa_sex;
- #endif
- extern int amiga_parse_bootinfo(const struct bi_record *);
- extern int atari_parse_bootinfo(const struct bi_record *);
- extern int mac_parse_bootinfo(const struct bi_record *);
- extern int q40_parse_bootinfo(const struct bi_record *);
- extern int bvme6000_parse_bootinfo(const struct bi_record *);
- extern int mvme16x_parse_bootinfo(const struct bi_record *);
- extern int mvme147_parse_bootinfo(const struct bi_record *);
- extern void config_amiga(void);
- extern void config_atari(void);
- extern void config_mac(void);
- extern void config_sun3(void);
- extern void config_apollo(void);
- extern void config_mvme147(void);
- extern void config_mvme16x(void);
- extern void config_bvme6000(void);
- extern void config_hp300(void);
- extern void config_q40(void);
- extern void config_sun3x(void);
- extern void mac_debugging_short (int, short);
- extern void mac_debugging_long (int, long);
- #define MASK_256K 0xfffc0000
- extern void paging_init(void);
- static void __init m68k_parse_bootinfo(const struct bi_record *record)
- {
- while (record->tag != BI_LAST) {
- int unknown = 0;
- const unsigned long *data = record->data;
- switch (record->tag) {
- case BI_MACHTYPE:
- case BI_CPUTYPE:
- case BI_FPUTYPE:
- case BI_MMUTYPE:
- /* Already set up by head.S */
- break;
- case BI_MEMCHUNK:
- if (m68k_num_memory < NUM_MEMINFO) {
- m68k_memory[m68k_num_memory].addr = data[0];
- m68k_memory[m68k_num_memory].size = data[1];
- m68k_num_memory++;
- } else
- printk("m68k_parse_bootinfo: too many memory chunksn");
- break;
- case BI_RAMDISK:
- m68k_ramdisk.addr = data[0];
- m68k_ramdisk.size = data[1];
- break;
- case BI_COMMAND_LINE:
- strncpy(m68k_command_line, (const char *)data, CL_SIZE);
- m68k_command_line[CL_SIZE-1] = ' ';
- break;
- default:
- if (MACH_IS_AMIGA)
- unknown = amiga_parse_bootinfo(record);
- else if (MACH_IS_ATARI)
- unknown = atari_parse_bootinfo(record);
- else if (MACH_IS_MAC)
- unknown = mac_parse_bootinfo(record);
- else if (MACH_IS_Q40)
- unknown = q40_parse_bootinfo(record);
- else if (MACH_IS_BVME6000)
- unknown = bvme6000_parse_bootinfo(record);
- else if (MACH_IS_MVME16x)
- unknown = mvme16x_parse_bootinfo(record);
- else if (MACH_IS_MVME147)
- unknown = mvme147_parse_bootinfo(record);
- else
- unknown = 1;
- }
- if (unknown)
- printk("m68k_parse_bootinfo: unknown tag 0x%04x ignoredn",
- record->tag);
- record = (struct bi_record *)((unsigned long)record+record->size);
- }
- m68k_realnum_memory = m68k_num_memory;
- #ifdef CONFIG_SINGLE_MEMORY_CHUNK
- if (m68k_num_memory > 1) {
- printk("Ignoring last %i chunks of physical memoryn",
- (m68k_num_memory - 1));
- m68k_num_memory = 1;
- }
- m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
- #endif
- }
- void __init setup_arch(char **cmdline_p)
- {
- extern int _etext, _edata, _end;
- #ifndef CONFIG_SUN3
- unsigned long endmem, startmem;
- #endif
- int i;
- char *p, *q;
- /* The bootinfo is located right after the kernel bss */
- m68k_parse_bootinfo((const struct bi_record *)&_end);
- if (CPU_IS_040)
- m68k_is040or060 = 4;
- else if (CPU_IS_060)
- m68k_is040or060 = 6;
- /* FIXME: m68k_fputype is passed in by Penguin booter, which can
- * be confused by software FPU emulation. BEWARE.
- * We should really do our own FPU check at startup.
- * [what do we do with buggy 68LC040s? if we have problems
- * with them, we should add a test to check_bugs() below] */
- #ifndef CONFIG_M68KFPU_EMU_ONLY
- /* clear the fpu if we have one */
- if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
- volatile int zero = 0;
- asm __volatile__ ("frestore %0" : : "m" (zero));
- }
- #endif
- init_mm.start_code = PAGE_OFFSET;
- init_mm.end_code = (unsigned long) &_etext;
- init_mm.end_data = (unsigned long) &_edata;
- init_mm.brk = (unsigned long) &_end;
- *cmdline_p = m68k_command_line;
- memcpy(saved_command_line, *cmdline_p, CL_SIZE);
- /* Parse the command line for arch-specific options.
- * For the m68k, this is currently only "debug=xxx" to enable printing
- * certain kernel messages to some machine-specific device.
- */
- for( p = *cmdline_p; p && *p; ) {
- i = 0;
- if (!strncmp( p, "debug=", 6 )) {
- strncpy( m68k_debug_device, p+6, sizeof(m68k_debug_device)-1 );
- m68k_debug_device[sizeof(m68k_debug_device)-1] = 0;
- if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
- i = 1;
- }
- #ifdef CONFIG_ATARI
- /* This option must be parsed very early */
- if (!strncmp( p, "switches=", 9 )) {
- extern void atari_switches_setup( const char *, int );
- atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
- (q - (p+9)) : strlen(p+9) );
- i = 1;
- }
- #endif
- if (i) {
- /* option processed, delete it */
- if ((q = strchr( p, ' ' )))
- strcpy( p, q+1 );
- else
- *p = 0;
- } else {
- if ((p = strchr( p, ' ' ))) ++p;
- }
- }
- switch (m68k_machtype) {
- #ifdef CONFIG_AMIGA
- case MACH_AMIGA:
- config_amiga();
- break;
- #endif
- #ifdef CONFIG_ATARI
- case MACH_ATARI:
- config_atari();
- break;
- #endif
- #ifdef CONFIG_MAC
- case MACH_MAC:
- config_mac();
- break;
- #endif
- #ifdef CONFIG_SUN3
- case MACH_SUN3:
- config_sun3();
- break;
- #endif
- #ifdef CONFIG_APOLLO
- case MACH_APOLLO:
- config_apollo();
- break;
- #endif
- #ifdef CONFIG_MVME147
- case MACH_MVME147:
- config_mvme147();
- break;
- #endif
- #ifdef CONFIG_MVME16x
- case MACH_MVME16x:
- config_mvme16x();
- break;
- #endif
- #ifdef CONFIG_BVME6000
- case MACH_BVME6000:
- config_bvme6000();
- break;
- #endif
- #ifdef CONFIG_HP300
- case MACH_HP300:
- config_hp300();
- break;
- #endif
- #ifdef CONFIG_Q40
- case MACH_Q40:
- config_q40();
- break;
- #endif
- #ifdef CONFIG_SUN3X
- case MACH_SUN3X:
- config_sun3x();
- break;
- #endif
- default:
- panic ("No configuration setup");
- }
- #ifndef CONFIG_SUN3
- startmem= m68k_memory[0].addr;
- endmem = startmem + m68k_memory[0].size;
- high_memory = PAGE_OFFSET;
- for (i = 0; i < m68k_num_memory; i++) {
- m68k_memory[i].size &= MASK_256K;
- if (m68k_memory[i].addr < startmem)
- startmem = m68k_memory[i].addr;
- if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
- endmem = m68k_memory[i].addr+m68k_memory[i].size;
- high_memory += m68k_memory[i].size;
- }
- availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
- startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
- for (i = 0; i < m68k_num_memory; i++)
- free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
- reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
- #ifdef CONFIG_BLK_DEV_INITRD
- if (m68k_ramdisk.size) {
- reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
- initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
- initrd_end = initrd_start + m68k_ramdisk.size;
- printk ("initrd: %08lx - %08lxn", initrd_start, initrd_end);
- }
- #endif
- #ifdef CONFIG_ATARI
- if (MACH_IS_ATARI)
- atari_stram_reserve_pages(availmem);
- #endif
- #ifdef CONFIG_SUN3X
- if (MACH_IS_SUN3X) {
- dvma_init();
- #ifdef CONFIG_SUN3X_ZS
- sun_serial_setup();
- #endif
- }
- #endif
- #endif /* !CONFIG_SUN3 */
- paging_init();
- /* set ISA defs early as possible */
- #if defined(CONFIG_ISA)
- #if defined(CONFIG_Q40)
- if (MACH_IS_Q40) {
- isa_type = Q40_ISA;
- isa_sex = 0;
- }
- #elif defined(CONFIG_GG2)
- if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
- isa_type = GG2_ISA;
- isa_sex = 0;
- }
- #elif defined(CONFIG_AMIGA_PCMCIA)
- if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
- isa_type = AG_ISA;
- isa_sex = 1;
- }
- #endif
- #endif
- }
- int get_cpuinfo(char * buffer)
- {
- const char *cpu, *mmu, *fpu;
- unsigned long clockfreq, clockfactor;
- #define LOOP_CYCLES_68020 (8)
- #define LOOP_CYCLES_68030 (8)
- #define LOOP_CYCLES_68040 (3)
- #define LOOP_CYCLES_68060 (1)
- if (CPU_IS_020) {
- cpu = "68020";
- clockfactor = LOOP_CYCLES_68020;
- } else if (CPU_IS_030) {
- cpu = "68030";
- clockfactor = LOOP_CYCLES_68030;
- } else if (CPU_IS_040) {
- cpu = "68040";
- clockfactor = LOOP_CYCLES_68040;
- } else if (CPU_IS_060) {
- cpu = "68060";
- clockfactor = LOOP_CYCLES_68060;
- } else {
- cpu = "680x0";
- clockfactor = 0;
- }
- #ifdef CONFIG_M68KFPU_EMU_ONLY
- fpu="none(soft float)";
- #else
- if (m68k_fputype & FPU_68881)
- fpu = "68881";
- else if (m68k_fputype & FPU_68882)
- fpu = "68882";
- else if (m68k_fputype & FPU_68040)
- fpu = "68040";
- else if (m68k_fputype & FPU_68060)
- fpu = "68060";
- else if (m68k_fputype & FPU_SUNFPA)
- fpu = "Sun FPA";
- else
- fpu = "none";
- #endif
- if (m68k_mmutype & MMU_68851)
- mmu = "68851";
- else if (m68k_mmutype & MMU_68030)
- mmu = "68030";
- else if (m68k_mmutype & MMU_68040)
- mmu = "68040";
- else if (m68k_mmutype & MMU_68060)
- mmu = "68060";
- else if (m68k_mmutype & MMU_SUN3)
- mmu = "Sun-3";
- else if (m68k_mmutype & MMU_APOLLO)
- mmu = "Apollo";
- else
- mmu = "unknown";
- clockfreq = loops_per_jiffy*HZ*clockfactor;
- return(sprintf(buffer, "CPU:tt%sn"
- "MMU:tt%sn"
- "FPU:tt%sn"
- "Clocking:t%lu.%1luMHzn"
- "BogoMips:t%lu.%02lun"
- "Calibration:t%lu loopsn",
- cpu, mmu, fpu,
- clockfreq/1000000,(clockfreq/100000)%10,
- loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
- loops_per_jiffy));
- }
- int get_hardware_list(char *buffer)
- {
- int len = 0;
- char model[80];
- unsigned long mem;
- int i;
- if (mach_get_model)
- mach_get_model(model);
- else
- strcpy(model, "Unknown m68k");
- len += sprintf(buffer+len, "Model:tt%sn", model);
- len += get_cpuinfo(buffer+len);
- for (mem = 0, i = 0; i < m68k_num_memory; i++)
- mem += m68k_memory[i].size;
- len += sprintf(buffer+len, "System Memory:t%ldKn", mem>>10);
- if (mach_get_hardware_list)
- len += mach_get_hardware_list(buffer+len);
- return(len);
- }
- #if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
- void __init floppy_setup(char *str, int *ints)
- {
- if (mach_floppy_setup)
- mach_floppy_setup (str, ints);
- }
- void floppy_eject(void)
- {
- if (mach_floppy_eject)
- mach_floppy_eject();
- }
- #endif
- /* for "kbd-reset" cmdline param */
- void __init kbd_reset_setup(char *str, int *ints)
- {
- }
- void arch_gettod(int *year, int *mon, int *day, int *hour,
- int *min, int *sec)
- {
- if (mach_gettod)
- mach_gettod(year, mon, day, hour, min, sec);
- else
- *year = *mon = *day = *hour = *min = *sec = 0;
- }
- 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 projectn" );
- printk( KERN_EMERG "(see http://no-fpu.linux-m68k.org)n" );
- panic( "no FPU" );
- }
- #endif /* CONFIG_SUN3 */
- }