Home | History | Annotate | Line # | Download | only in booke 
      1 /*	$NetBSD: e500_autoconf.c,v 1.2 2011/01/18 01:02:52 matt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Raytheon BBN Technologies Corp and Defense Advanced Research Projects
      9  * Agency and which was developed by Matt Thomas of 3am Software Foundry.
     10  *
     11  * This material is based upon work supported by the Defense Advanced Research
     12  * Projects Agency and Space and Naval Warfare Systems Center, Pacific, under
     13  * Contract No. N66001-09-C-2073.
     14  * Approved for Public Release, Distribution Unlimited
     15  *
     16  * Redistribution and use in source and binary forms, with or without
     17  * modification, are permitted provided that the following conditions
     18  * are met:
     19  * 1. Redistributions of source code must retain the above copyright
     20  *    notice, this list of conditions and the following disclaimer.
     21  * 2. Redistributions in binary form must reproduce the above copyright
     22  *    notice, this list of conditions and the following disclaimer in the
     23  *    documentation and/or other materials provided with the distribution.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     26  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #include <sys/cdefs.h>
     39 __KERNEL_RCSID(0, "$NetBSD: e500_autoconf.c,v 1.2 2011/01/18 01:02:52 matt Exp $");
     40 
     41 #include <sys/param.h>
     42 #include <sys/cpu.h>
     43 #include <sys/conf.h>
     44 #include <sys/device.h>
     45 #include <sys/systm.h>
     46 
     47 #include <net/if.h>
     48 #include <net/if_ether.h>
     49 
     50 #define	GLOBAL_PRIVATE
     51 
     52 #include <powerpc/spr.h>
     53 #include <powerpc/booke/spr.h>
     54 
     55 #include <powerpc/booke/cpuvar.h>
     56 #include <powerpc/booke/e500var.h>
     57 #include <powerpc/booke/e500reg.h>
     58 
     59 void
     60 e500_device_register(device_t dev, void *aux)
     61 {
     62 }
     63 
     64 /*
     65  * Let's see if the DEVDISR bit encoded in the low 6 bits of cnl_flags is
     66  * set.  If it is, the device is disabled.
     67  */
     68 bool
     69 e500_device_disabled_p(uint32_t flags)
     70 {
     71 	if ((flags-- & 63) == 0)
     72 		return false;
     73 
     74 	const uint32_t v = cpu_read_4(GLOBAL_BASE + DEVDISR);
     75 	return (v & (1 << (flags & 31))) != 0;
     76 }
     77 
     78 uint16_t
     79 e500_get_svr(void)
     80 {
     81 	uint32_t svr = (mfspr(SPR_SVR) >> 16) & ~8;
     82 
     83 	switch (svr) {
     84 	case SVR_MPC8543v1 >> 16:
     85 		return SVR_MPC8548v1 >> 16;
     86 	case SVR_MPC8541v1 >> 16:
     87 		return SVR_MPC8555v1 >> 16;
     88 	default:
     89 		return svr;
     90 	}
     91 }
     92 
     93 u_int
     94 e500_truth_decode(u_int instance, uint32_t data,
     95 	const struct e500_truthtab *tab, size_t ntab, u_int default_value)
     96 {
     97 	const uint16_t svr = e500_get_svr();
     98 
     99 	for (u_int i = ntab; i-- > 0; tab++) {
    100 #if 0
    101 		printf("%s: [%u] = %x/%x %u/%u (%#x & %#x) = %#x (%#x)\n",
    102 		    __func__, i, tab->tt_svrhi, svr,
    103 		    tab->tt_instance, instance,
    104 		    data, tab->tt_mask, data & tab->tt_mask, tab->tt_value);
    105 #endif
    106 		if (tab->tt_svrhi == svr
    107 		    && tab->tt_instance == instance
    108 		    && (data & tab->tt_mask) == tab->tt_value)
    109 			return tab->tt_result;
    110 	}
    111 	return default_value;
    112 }
    113 
    114 int
    115 e500_cpunode_submatch(device_t parent, cfdata_t cf, const char *name, void *aux)
    116 {
    117 	struct cpunode_softc * const psc = device_private(parent);
    118 	struct cpunode_attach_args * const cna = aux;
    119 	struct cpunode_locators * const cnl = &cna->cna_locs;
    120 
    121 	if (!board_info_get_bool("pq3")
    122 	    || strcmp(cnl->cnl_name, name) != 0
    123 	    || e500_device_disabled_p(cnl->cnl_flags)
    124 	    || (cna->cna_childmask & psc->sc_children)
    125 	    || (cf->cf_loc[CPUNODECF_INSTANCE] != CPUNODECF_INSTANCE_DEFAULT
    126 		&& cf->cf_loc[CPUNODECF_INSTANCE] != cnl->cnl_instance))
    127 		return 0;
    128 
    129 	return 1;
    130 }
    131