misc.c

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/*
 * misc.c:  Miscellaneous prom functions that don't belong
 *          anywhere else.
 *
 * Copyright (C) 1995 David S. Miller ([email protected])
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/sun3-head.h>
#include <asm/idprom.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/movs.h>

/* Reset and reboot the machine with the command 'bcommand'. */
void
prom_reboot(char *bcommand)
{
    unsigned long flags;
    local_irq_save(flags);
    (*(romvec->pv_reboot))(bcommand);
    local_irq_restore(flags);
}

/* Drop into the prom, with the chance to continue with the 'go'
 * prom command.
 */
void
prom_cmdline(void)
{
}

/* Drop into the prom, but completely terminate the program.
 * No chance of continuing.
 */
void
prom_halt(void)
{
    unsigned long flags;
again:
    local_irq_save(flags);
    (*(romvec->pv_halt))();
    local_irq_restore(flags);
    goto again; /* PROM is out to get me -DaveM */
}

typedef void (*sfunc_t)(void);

/* Get the idprom and stuff it into buffer 'idbuf'.  Returns the
 * format type.  'num_bytes' is the number of bytes that your idbuf
 * has space for.  Returns 0xff on error.
 */
unsigned char
prom_get_idprom(char *idbuf, int num_bytes)
{
    int i, oldsfc;
    GET_SFC(oldsfc);
    SET_SFC(FC_CONTROL);
    for(i=0;i<num_bytes; i++)
    {
        /* There is a problem with the GET_CONTROL_BYTE
        macro; defining the extra variable
        gets around it.
        */
        int c;
        GET_CONTROL_BYTE(SUN3_IDPROM_BASE + i, c);
        idbuf[i] = c;
    }
    SET_SFC(oldsfc);
    return idbuf[0];
}

/* Get the major prom version number. */
int
prom_version(void)
{
    return romvec->pv_romvers;
}

/* Get the prom plugin-revision. */
int
prom_getrev(void)
{
    return prom_rev;
}

/* Get the prom firmware print revision. */
int
prom_getprev(void)
{
    return prom_prev;
}