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setup.c

/*
 *  linux/arch/m68k/kernel/setup.c
 *
 *  Copyright (C) 1995  Hamish Macdonald
 */

/*
 * This file handles the architecture-dependent parts of system setup
 */

#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/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/module.h>
#include <linux/initrd.h>

#include <asm/bootinfo.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/fpu.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>
#include <asm/atari_stram.h>
#endif
#ifdef CONFIG_SUN3X
#include <asm/dvma.h>
#endif

#if !FPSTATESIZE || !NR_IRQS
#warning No CPU/platform type selected, your kernel will not work!
#warning Are you building an allnoconfig kernel?
#endif

unsigned long m68k_machtype;
EXPORT_SYMBOL(m68k_machtype);
unsigned long m68k_cputype;
EXPORT_SYMBOL(m68k_cputype);
unsigned long m68k_fputype;
unsigned long m68k_mmutype;
EXPORT_SYMBOL(m68k_mmutype);
#ifdef CONFIG_VME
unsigned long vme_brdtype;
EXPORT_SYMBOL(vme_brdtype);
#endif

int m68k_is040or060;
EXPORT_SYMBOL(m68k_is040or060);

extern unsigned long availmem;

int m68k_num_memory;
EXPORT_SYMBOL(m68k_num_memory);
int m68k_realnum_memory;
EXPORT_SYMBOL(m68k_realnum_memory);
unsigned long m68k_memoffset;
struct mem_info m68k_memory[NUM_MEMINFO];
EXPORT_SYMBOL(m68k_memory);

struct mem_info m68k_ramdisk;

static char m68k_command_line[CL_SIZE];

void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
/* machine dependent irq functions */
void (*mach_init_IRQ) (void) __initdata = NULL;
void (*mach_get_model) (char *model);
void (*mach_get_hardware_list) (struct seq_file *m);
/* machine dependent timer functions */
unsigned long (*mach_gettimeoffset) (void);
int (*mach_hwclk) (int, struct rtc_time*);
EXPORT_SYMBOL(mach_hwclk);
int (*mach_set_clock_mmss) (unsigned long);
unsigned int (*mach_get_ss)(void);
int (*mach_get_rtc_pll)(struct rtc_pll_info *);
int (*mach_set_rtc_pll)(struct rtc_pll_info *);
EXPORT_SYMBOL(mach_get_ss);
EXPORT_SYMBOL(mach_get_rtc_pll);
EXPORT_SYMBOL(mach_set_rtc_pll);
void (*mach_reset)( void );
void (*mach_halt)( void );
void (*mach_power_off)( void );
long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
#ifdef CONFIG_HEARTBEAT
void (*mach_heartbeat) (int);
EXPORT_SYMBOL(mach_heartbeat);
#endif
#ifdef CONFIG_M68K_L2_CACHE
void (*mach_l2_flush) (int);
#endif
#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
void (*mach_beep)(unsigned int, unsigned int);
EXPORT_SYMBOL(mach_beep);
#endif
#if defined(CONFIG_ISA) && defined(MULTI_ISA)
int isa_type;
int isa_sex;
EXPORT_SYMBOL(isa_type);
EXPORT_SYMBOL(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 int hp300_parse_bootinfo(const struct bi_record *);
extern int apollo_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);

#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 chunks\n");
                  break;

            case BI_RAMDISK:
                  m68k_ramdisk.addr = data[0];
                  m68k_ramdisk.size = data[1];
                  break;

            case BI_COMMAND_LINE:
                  strlcpy(m68k_command_line, (const char *)data,
                        sizeof(m68k_command_line));
                  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 if (MACH_IS_HP300)
                        unknown = hp300_parse_bootinfo(record);
                  else if (MACH_IS_APOLLO)
                        unknown = apollo_parse_bootinfo(record);
                  else
                        unknown = 1;
            }
            if (unknown)
                  printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
                         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 memory\n",
                   (m68k_num_memory - 1));
            m68k_num_memory = 1;
      }
#endif
}

void __init setup_arch(char **cmdline_p)
{
      int i;

      /* 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

      if (CPU_IS_060) {
            u32 pcr;

            asm (".chip 68060; movec %%pcr,%0; .chip 68k"
                 : "=d" (pcr));
            if (((pcr >> 8) & 0xff) <= 5) {
                  printk("Enabling workaround for errata I14\n");
                  asm (".chip 68060; movec %0,%%pcr; .chip 68k"
                       : : "d" (pcr | 0x20));
            }
      }

      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(boot_command_line, *cmdline_p, CL_SIZE);

      parse_early_param();

#ifdef CONFIG_DUMMY_CONSOLE
      conswitchp = &dummy_con;
#endif

      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");
      }

      paging_init();

#ifndef CONFIG_SUN3
      for (i = 1; i < m68k_num_memory; i++)
            free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
                          m68k_memory[i].size);
#ifdef CONFIG_BLK_DEV_INITRD
      if (m68k_ramdisk.size) {
            reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
                             m68k_ramdisk.addr, m68k_ramdisk.size,
                             BOOTMEM_DEFAULT);
            initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
            initrd_end = initrd_start + m68k_ramdisk.size;
            printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
      }
#endif

#ifdef CONFIG_ATARI
      if (MACH_IS_ATARI)
            atari_stram_reserve_pages((void *)availmem);
#endif
#ifdef CONFIG_SUN3X
      if (MACH_IS_SUN3X) {
            dvma_init();
      }
#endif

#endif /* !CONFIG_SUN3 */

/* set ISA defs early as possible */
#if defined(CONFIG_ISA) && defined(MULTI_ISA)
      if (MACH_IS_Q40) {
            isa_type = ISA_TYPE_Q40;
            isa_sex = 0;
      }
#ifdef CONFIG_AMIGA_PCMCIA
      if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
            isa_type = ISA_TYPE_AG;
            isa_sex = 1;
      }
#endif
#endif
}

static int show_cpuinfo(struct seq_file *m, void *v)
{
      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;

      seq_printf(m, "CPU:\t\t%s\n"
               "MMU:\t\t%s\n"
               "FPU:\t\t%s\n"
               "Clocking:\t%lu.%1luMHz\n"
               "BogoMips:\t%lu.%02lu\n"
               "Calibration:\t%lu loops\n",
               cpu, mmu, fpu,
               clockfreq/1000000,(clockfreq/100000)%10,
               loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
               loops_per_jiffy);
      return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
      return *pos < 1 ? (void *)1 : NULL;
}
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
      ++*pos;
      return NULL;
}
static void c_stop(struct seq_file *m, void *v)
{
}
const struct seq_operations cpuinfo_op = {
      .start      = c_start,
      .next = c_next,
      .stop = c_stop,
      .show = show_cpuinfo,
};

#ifdef CONFIG_PROC_HARDWARE
static int hardware_proc_show(struct seq_file *m, void *v)
{
      char model[80];
      unsigned long mem;
      int i;

      if (mach_get_model)
            mach_get_model(model);
      else
            strcpy(model, "Unknown m68k");

      seq_printf(m, "Model:\t\t%s\n", model);
      for (mem = 0, i = 0; i < m68k_num_memory; i++)
            mem += m68k_memory[i].size;
      seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);

      if (mach_get_hardware_list)
            mach_get_hardware_list(m);

      return 0;
}

static int hardware_proc_open(struct inode *inode, struct file *file)
{
      return single_open(file, hardware_proc_show, NULL);
}

static const struct file_operations hardware_proc_fops = {
      .open       = hardware_proc_open,
      .read       = seq_read,
      .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 */

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