setup_mm.c

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/*
 *  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
#include <asm/natfeat.h>

#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)
{
#ifndef CONFIG_SUN3
    int i;
#endif

    /* The bootinfo is located right after the kernel bss */
    if (!CPU_IS_COLDFIRE)
        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|FPU_COLDFIRE)) {
        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;

#if defined(CONFIG_BOOTPARAM)
    strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
    m68k_command_line[CL_SIZE - 1] = 0;
#endif /* CONFIG_BOOTPARAM */
    *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
#ifdef CONFIG_COLDFIRE
    case MACH_M54XX:
        config_BSP(NULL, 0);
        break;
#endif
    default:
        panic("No configuration setup");
    }

#ifdef CONFIG_NATFEAT
    nf_init();
#endif

    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)
#define LOOP_CYCLES_COLDFIRE    (2)

    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 if (CPU_IS_COLDFIRE) {
        cpu = "ColdFire";
        clockfactor = LOOP_CYCLES_COLDFIRE;
    } 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 if (m68k_fputype & FPU_COLDFIRE)
        fpu = "ColdFire";
    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 if (m68k_mmutype & MMU_COLDFIRE)
        mmu = "ColdFire";
    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 */