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/* $Id: init_me.c,v 1.1 2005-12-20 09:50:39 jcastillo Exp $

 * init_me.c:  Initialize empirical constants and gather some info from

 *             the boot prom.

 *

 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)

 */

#include <asm/openprom.h>  /* For property declarations and the prom structs */

#include <asm/oplib.h>

#include <asm/vac-ops.h>

#include "empirical.h"   /* Don't ask... */

#define DEBUG_INIT_ME    /* Tell me what's going on */

unsigned int nwindows;   /* Set in bare.S */

unsigned int nwindowsm1;

unsigned int pac_or_vac; /* 0 means "dunno" 1 means "VAC" 2 means "PAC" */

unsigned int pvac_size;  /* Use the same two variables for a PAC and VAC */

unsigned int pvac_linesize;

unsigned int pac_size;

int num_segmaps;

int num_contexts;

unsigned int BOGOMIPS;        /* bogosity without the VAC cache on */

unsigned int BOGOMIPS_WCACHE; /* bogosity with the VAC cache */

unsigned int delay_factor;

extern int prom_node_root;

void (*printk)(const char *str, ...);

void init_me(void)

{

        unsigned int grrr;

        printk = romvec->pv_printf;

        prom_node_root = prom_nextnode(0);

        prom_getprop(prom_node_root, "mmu-npmg", &num_segmaps,

                     sizeof(unsigned int));

        pvac_size = prom_getint_default(prom_node_root, "vac-size", 65536);

        pvac_linesize = prom_getint_default(prom_node_root, "vac-linesize", 16);

        grrr = prom_getint_default(prom_node_root, "mips-on", 0);

        if(!grrr) {

                grrr = prom_getint_default(prom_node_root, "clock-frequency", 0);

                if(grrr > 15000000 && grrr < 100000000) {

                        BOGOMIPS = 3;

                        BOGOMIPS_WCACHE = grrr / 1000000;

                } else {

                        BOGOMIPS = DEF_BOGO;

                        BOGOMIPS_WCACHE = DEF_BOGO;

                }

        } else (BOGOMIPS_WCACHE = grrr,

                BOGOMIPS = prom_getint(prom_node_root, "mips-off"));

#ifdef DEBUG_INIT_ME

        (*(romvec->pv_printf))("\nBOGOMIPS        %d\n", (int) BOGOMIPS);

        (*(romvec->pv_printf))("BOGOMIPS_WCACHE %d\n", (int) BOGOMIPS_WCACHE);

        (*(romvec->pv_printf))("pvac_size        %d\n", (int) pvac_size);

        (*(romvec->pv_printf))("pvac_linesize    %d\n", (int) pvac_linesize);

        (*(romvec->pv_printf))("num_segmaps     %d\n", (int) num_segmaps);

#endif

        delay_factor = (BOGOMIPS > 3) ? ((BOGOMIPS - 2) >> 1) : 11;

        (*(romvec->pv_printf))("\nLILO: \n");

        return;

}