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/*

 *  linux/arch/m68k/sun3/config.c

 *

 *  Copyright (C) 1996,1997 Pekka Pietik{inen

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file COPYING in the main directory of this archive

 * for more details.

 */

#include <linux/config.h>

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/mm.h>

#include <linux/tty.h>

#include <linux/console.h>

#include <linux/init.h>

#include <linux/bootmem.h>

#include <asm/oplib.h>

#include <asm/setup.h>

#include <asm/contregs.h>

#include <asm/movs.h>

#include <asm/pgtable.h>

#include <asm/sun3-head.h>

#include <asm/sun3mmu.h>

#include <asm/rtc.h>

#include <asm/machdep.h>

#include <asm/intersil.h>

#include <asm/irq.h>

#include <asm/segment.h>

#include <asm/sun3ints.h>

extern char _text, _end;

char sun3_reserved_pmeg[SUN3_PMEGS_NUM];

extern unsigned long sun3_gettimeoffset(void);

extern int sun3_get_irq_list (char *);

extern void sun3_sched_init(void (*handler)(int, void *, struct pt_regs *));

extern void sun3_get_model (char* model);

extern void idprom_init (void);

extern void sun3_gettod (int *yearp, int *monp, int *dayp,

                   int *hourp, int *minp, int *secp);

extern int sun3_hwclk(int set, struct rtc_time *t);

extern void sun_serial_setup(void);

volatile char* clock_va;

extern volatile unsigned char* sun3_intreg;

extern unsigned long availmem;

unsigned long num_pages;

void __init sun3_init(void)

{

        unsigned char enable_register;

        int i;

        m68k_machtype= MACH_SUN3;

        m68k_cputype = CPU_68020;

        m68k_fputype = FPU_68881; /* mc68881 actually */

        m68k_mmutype = MMU_SUN3;

        clock_va    =          (char *) 0xfe06000;      /* dark  */

        sun3_intreg = (unsigned char *) 0xfe0a000;      /* magic */

        sun3_disable_interrupts();

        prom_init((void *)LINUX_OPPROM_BEGVM);

        GET_CONTROL_BYTE(AC_SENABLE,enable_register);

        enable_register |= 0x50; /* Enable FPU */

        SET_CONTROL_BYTE(AC_SENABLE,enable_register);

        GET_CONTROL_BYTE(AC_SENABLE,enable_register);

        /* This code looks suspicious, because it doesn't subtract

           memory belonging to the kernel from the available space */

        memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg));

        /* Reserve important PMEGS */

        /* FIXME: These should be probed instead of hardcoded */

        for (i=0; i<8; i++)              /* Kernel PMEGs */

                sun3_reserved_pmeg[i] = 1;

        sun3_reserved_pmeg[247] = 1;    /* ROM mapping  */

        sun3_reserved_pmeg[248] = 1;    /* AMD Ethernet */

        sun3_reserved_pmeg[251] = 1;    /* VB area      */

        sun3_reserved_pmeg[254] = 1;    /* main I/O     */

        sun3_reserved_pmeg[249] = 1;

        sun3_reserved_pmeg[252] = 1;

        sun3_reserved_pmeg[253] = 1;

        set_fs(KERNEL_DS);

}

/* Without this, Bad Things happen when something calls arch_reset. */

static void sun3_reboot (void)

{

        prom_reboot ("vmlinux");

}

static void sun3_halt (void)

{

        prom_halt ();

}

/* sun3 bootmem allocation */

void __init sun3_bootmem_alloc(unsigned long memory_start, unsigned long memory_end)

{

        unsigned long start_page;

        /* align start/end to page boundries */

        memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK);

        memory_end = memory_end & PAGE_MASK;

        start_page = __pa(memory_start) >> PAGE_SHIFT;

        num_pages = __pa(memory_end) >> PAGE_SHIFT;

        high_memory = (void *)memory_end;

        availmem = memory_start;

        availmem += init_bootmem(start_page, num_pages);

        availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK;

        free_bootmem(__pa(availmem), memory_end - (availmem));

}

void __init config_sun3(void)

{

        unsigned long memory_start, memory_end;

        printk("ARCH: SUN3\n");

        idprom_init();

        /* Subtract kernel memory from available memory */

        mach_sched_init      =  sun3_sched_init;

        mach_init_IRQ        =  sun3_init_IRQ;

        mach_default_handler = &sun3_default_handler;

        mach_request_irq     =  sun3_request_irq;

        mach_free_irq        =  sun3_free_irq;

#ifdef CONFIG_VT

//      mach_keyb_init       =  sun3_keyb_init;

#endif

        enable_irq           =  sun3_enable_irq;

        disable_irq          =  sun3_disable_irq;

        mach_process_int     =  sun3_process_int;

        mach_get_irq_list    =  sun3_get_irq_list;

        mach_gettod          =  sun3_gettod;

        mach_reset           =  sun3_reboot;

        mach_gettimeoffset   =  sun3_gettimeoffset;

        mach_get_model       =  sun3_get_model;

        mach_hwclk           =  sun3_hwclk;

        mach_halt            =  sun3_halt;

#if !defined(CONFIG_SERIAL_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)

        conswitchp           = &dummy_con;

#endif

        memory_start = ((((int)&_end) + 0x2000) & ~0x1fff);

// PROM seems to want the last couple of physical pages. --m

        memory_end   = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE;

        m68k_num_memory=1;

        m68k_memory[0].size=*(romvec->pv_sun3mem);

        sun3_bootmem_alloc(memory_start, memory_end);

#ifdef CONFIG_SUN3X_ZS

        sun_serial_setup();

#endif

}

void __init sun3_sched_init(void (*timer_routine)(int, void *, struct pt_regs *))

{

        sun3_disable_interrupts();

        intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE);

        intersil_clock->int_reg=INTERSIL_HZ_100_MASK;

        intersil_clear();

        sun3_enable_irq(5);

        intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE);

        sun3_enable_interrupts();

        intersil_clear();

}