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prompatch.c revision 1.1 
      1 /*	$NetBSD: prompatch.c,v 1.1 2001/06/21 03:13:05 uwe Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2001 Valeriy E. Ushakov
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include <sys/param.h>
     31 #include <lib/libsa/stand.h>
     32 #include <machine/promlib.h>
     33 
     34 void prom_patch(void);
     35 
     36 /*
     37  * Each patch entry is processed by:
     38  * printf(message);  prom_interpret(patch);  printf("\n");
     39  */
     40 struct patch_entry {
     41 	char *message;
     42 	char *patch;
     43 };
     44 
     45 /*
     46  * PROM patches to apply to machine matching name/promvers.
     47  */
     48 struct prom_patch {
     49 	char *name;		/* "name" of the root node */
     50 	int promvers;		/* prom_version() */
     51 	struct patch_entry *patches;
     52 };
     53 
     54 
     55 
     56 /*
     57  * Patches for JavaStation 1 with OBP 3.* (OpenFirmware).
     58  * PROM in these machines is crippled in many ways.
     59  */
     60 static struct patch_entry patch_js1_of[] = {
     61 
     62 /*
     63  * JS1/OF has no cpu node in the device tree.  Create one to save us a
     64  * _lot_ of headache in cpu.c and mainbus_attach.  Mostly copied from
     65  * OBP2.  While clock-frequency is usually at the root node, add it
     66  * here for brevity as kernel checks cpu node for this property anyway.
     67  */
     68 { "cpu: creating node ", /* NB: space at the end is intentional */
     69 	"0 0 0 0 \" /\" begin-package"
     70 	" \" FMI,MB86904\" device-name" /* NB: will print the name */
     71 	" \" cpu\" device-type"
     72 	" 0 \" mid\" integer-property"
     73 
     74 	" 8 \" sparc-version\" integer-property"
     75 	" 4 \" version\" integer-property"
     76 	" 0 \" implementation\" integer-property"
     77 	" 4 \" psr-version\" integer-property"
     78  	" 0 \" psr-implementation\" integer-property"
     79 
     80 	" d# 100000000 \" clock-frequency\" integer-property"
     81 
     82 	" d# 4096 \" page-size\" integer-property"
     83 	" d# 256 \" mmu-nctx\" integer-property"
     84 
     85 	" 2 \" ncaches\" integer-property"
     86 
     87 	" d# 512 \" icache-nlines\" integer-property"
     88 	" d# 32 \" icache-line-size\" integer-property"
     89 	" 1 \" icache-associativity\" integer-property"
     90 
     91 	" d# 512 \" dcache-nlines\" integer-property"
     92 	" d# 16 \" dcache-line-size\" integer-property"
     93 	" 1 \" dcache-associativity\" integer-property"
     94 
     95 	" 0 0 \" cache-physical?\" property"
     96 	" 0 0 \" cache-coherence?\" property"
     97 
     98 	" end-package"
     99 },
    100 
    101 /*
    102  * mk48txx_attach needs a model name, spare clockattach from guesswork.
    103  */
    104 { "eeprom: adding \"model\"",
    105 	"dev /obio/eeprom \" mk48t08\" model device-end"
    106 },
    107 
    108 /*
    109  * "interrupts" property is bogusly zero, delete it and let
    110  * sbus_get_intr fallback to correct "intr" property
    111  */
    112 { "le: deleting bogus \"interrupts\"",
    113 	"dev /sbus/ledma/le \" interrupts\" delete-property device-end"
    114 },
    115 
    116 /*
    117  * Give "su" (com port) "interrupts" property.
    118  */
    119 { "su: adding \"interrupts\"",
    120 	"dev /obio/su d# 13 \" interrupts\" integer-property device-end"
    121 },
    122 
    123 /*
    124  * Give "8042" (pckbc) "interrupts" property.
    125  */
    126 { "8042: adding \"interrupts\"",
    127 	"dev /obio/8042 d# 13 \" interrupts\" integer-property device-end"
    128 },
    129 
    130 { NULL, NULL }
    131 }; /* patch_js1_of */
    132 
    133 
    134 
    135 static struct prom_patch prom_patch_tab[] = {
    136 	{ "SUNW,JDM1", PROM_OPENFIRM, patch_js1_of },
    137 	{ NULL, 0, NULL }
    138 };
    139 
    140 
    141 /*
    142  * Check if this machine needs tweaks to its PROM.  It's simpler to
    143  * fix PROM than to invent workarounds in the kernel code.  We do this
    144  * patching in the secondary boot to avoid wasting space in the
    145  * kernel.
    146  */
    147 void
    148 prom_patch(void)
    149 {
    150 	char namebuf[32];
    151 	char *propval;
    152 	struct prom_patch *p;
    153 
    154 	propval = getpropstringA(prom_findroot(), "name",
    155 				 namebuf, sizeof(namebuf));
    156 	if (propval == NULL)
    157 		return;
    158 
    159 	for (p = prom_patch_tab; p->name != NULL; ++p) {
    160 		if (p->promvers == prom_version()
    161 		    && strcmp(p->name, namebuf) == 0) {
    162 			struct patch_entry *e;
    163 
    164 			printf("Patching PROM v%d for %s\n",
    165 			       p->promvers, p->name);
    166 			for (e = p->patches; e->message != NULL; ++e) {
    167 				printf("%s", e->message);
    168 				prom_interpret(e->patch);
    169 				printf("\n");
    170 			}
    171 			return;
    172 		}
    173 	}
    174 }
    175