ia64/linux-2.6.18-xen.hg

view arch/sparc/prom/sun4prom.c @ 0:831230e53067

Import 2.6.18 from kernel.org tarball.
author Ian Campbell <ian.campbell@xensource.com>
date Wed Apr 11 14:15:44 2007 +0100 (2007-04-11)
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1 /*
2 * Copyright (C) 1996 The Australian National University.
3 * Copyright (C) 1996 Fujitsu Laboratories Limited
4 * Copyright (C) 1997 Michael A. Griffith (grif@acm.org)
5 * Copyright (C) 1997 Sun Weenie (ko@ko.reno.nv.us)
6 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 *
8 * This software may be distributed under the terms of the Gnu
9 * Public License version 2 or later
10 *
11 * fake a really simple Sun prom for the SUN4
12 */
14 #include <linux/kernel.h>
15 #include <linux/string.h>
16 #include <asm/oplib.h>
17 #include <asm/idprom.h>
18 #include <asm/machines.h>
19 #include <asm/sun4prom.h>
20 #include <asm/asi.h>
21 #include <asm/contregs.h>
22 #include <linux/init.h>
24 static struct linux_romvec sun4romvec;
25 static struct idprom sun4_idprom;
27 struct property {
28 char *name;
29 char *value;
30 int length;
31 };
33 struct node {
34 int level;
35 struct property *properties;
36 };
38 struct property null_properties = { NULL, NULL, -1 };
40 struct property root_properties[] = {
41 {"device_type", "cpu", 4},
42 {"idprom", (char *)&sun4_idprom, sizeof(struct idprom)},
43 {NULL, NULL, -1}
44 };
46 struct node nodes[] = {
47 { 0, &null_properties },
48 { 0, root_properties },
49 { -1,&null_properties }
50 };
53 static int no_nextnode(int node)
54 {
55 if (nodes[node].level == nodes[node+1].level)
56 return node+1;
57 return -1;
58 }
60 static int no_child(int node)
61 {
62 if (nodes[node].level == nodes[node+1].level-1)
63 return node+1;
64 return -1;
65 }
67 static struct property *find_property(int node,char *name)
68 {
69 struct property *prop = &nodes[node].properties[0];
70 while (prop && prop->name) {
71 if (strcmp(prop->name,name) == 0) return prop;
72 prop++;
73 }
74 return NULL;
75 }
77 static int no_proplen(int node,char *name)
78 {
79 struct property *prop = find_property(node,name);
80 if (prop) return prop->length;
81 return -1;
82 }
84 static int no_getprop(int node,char *name,char *value)
85 {
86 struct property *prop = find_property(node,name);
87 if (prop) {
88 memcpy(value,prop->value,prop->length);
89 return 1;
90 }
91 return -1;
92 }
94 static int no_setprop(int node,char *name,char *value,int len)
95 {
96 return -1;
97 }
99 static char *no_nextprop(int node,char *name)
100 {
101 struct property *prop = find_property(node,name);
102 if (prop) return prop[1].name;
103 return NULL;
104 }
106 static struct linux_nodeops sun4_nodeops = {
107 no_nextnode,
108 no_child,
109 no_proplen,
110 no_getprop,
111 no_setprop,
112 no_nextprop
113 };
115 static int synch_hook;
117 struct linux_romvec * __init sun4_prom_init(void)
118 {
119 int i;
120 unsigned char x;
121 char *p;
123 p = (char *)&sun4_idprom;
124 for (i = 0; i < sizeof(sun4_idprom); i++) {
125 __asm__ __volatile__ ("lduba [%1] %2, %0" : "=r" (x) :
126 "r" (AC_IDPROM + i), "i" (ASI_CONTROL));
127 *p++ = x;
128 }
130 memset(&sun4romvec,0,sizeof(sun4romvec));
132 sun4_romvec = (linux_sun4_romvec *) SUN4_PROM_VECTOR;
134 sun4romvec.pv_romvers = 40;
135 sun4romvec.pv_nodeops = &sun4_nodeops;
136 sun4romvec.pv_reboot = sun4_romvec->reboot;
137 sun4romvec.pv_abort = sun4_romvec->abortentry;
138 sun4romvec.pv_halt = sun4_romvec->exittomon;
139 sun4romvec.pv_synchook = (void (**)(void))&synch_hook;
140 sun4romvec.pv_setctxt = sun4_romvec->setcxsegmap;
141 sun4romvec.pv_v0bootargs = sun4_romvec->bootParam;
142 sun4romvec.pv_nbgetchar = sun4_romvec->mayget;
143 sun4romvec.pv_nbputchar = sun4_romvec->mayput;
144 sun4romvec.pv_stdin = sun4_romvec->insource;
145 sun4romvec.pv_stdout = sun4_romvec->outsink;
147 /*
148 * We turn on the LEDs to let folks without monitors or
149 * terminals know we booted. Nothing too fancy now. They
150 * are all on, except for LED 5, which blinks. When we
151 * have more time, we can teach the penguin to say "By your
152 * command" or "Activating turbo boost, Michael". :-)
153 */
154 sun4_romvec->setLEDs(NULL);
156 printk("PROMLIB: Old Sun4 boot PROM monitor %s, romvec version %d\n",
157 sun4_romvec->monid,
158 sun4_romvec->romvecversion);
160 return &sun4romvec;
161 }