1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* IBM Summit-Specific Code
*
* Written By: Matthew Dobson, IBM Corporation
*
* Copyright (c) 2003 IBM Corp.
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Send feedback to <colpatch@us.ibm.com>
*
*/
#include <linux/mm.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/mach-summit/mach_mpparse.h>
static struct rio_table_hdr *rio_table_hdr __initdata;
static struct scal_detail *scal_devs[MAX_NUMNODES] __initdata;
static struct rio_detail *rio_devs[MAX_NUMNODES*4] __initdata;
static int __init setup_pci_node_map_for_wpeg(int wpeg_num, int last_bus)
{
int twister = 0, node = 0;
int i, bus, num_buses;
for(i = 0; i < rio_table_hdr->num_rio_dev; i++){
if (rio_devs[i]->node_id == rio_devs[wpeg_num]->owner_id){
twister = rio_devs[i]->owner_id;
break;
}
}
if (i == rio_table_hdr->num_rio_dev){
printk(KERN_ERR "%s: Couldn't find owner Cyclone for Winnipeg!\n", __FUNCTION__);
return last_bus;
}
for(i = 0; i < rio_table_hdr->num_scal_dev; i++){
if (scal_devs[i]->node_id == twister){
node = scal_devs[i]->node_id;
break;
}
}
if (i == rio_table_hdr->num_scal_dev){
printk(KERN_ERR "%s: Couldn't find owner Twister for Cyclone!\n", __FUNCTION__);
return last_bus;
}
switch (rio_devs[wpeg_num]->type){
case CompatWPEG:
/* The Compatibility Winnipeg controls the 2 legacy buses,
* the 66MHz PCI bus [2 slots] and the 2 "extra" buses in case
* a PCI-PCI bridge card is used in either slot: total 5 buses.
*/
num_buses = 5;
break;
case AltWPEG:
/* The Alternate Winnipeg controls the 2 133MHz buses [1 slot
* each], their 2 "extra" buses, the 100MHz bus [2 slots] and
* the "extra" buses for each of those slots: total 7 buses.
*/
num_buses = 7;
break;
case LookOutAWPEG:
case LookOutBWPEG:
/* A Lookout Winnipeg controls 3 100MHz buses [2 slots each]
* & the "extra" buses for each of those slots: total 9 buses.
*/
num_buses = 9;
break;
default:
printk(KERN_INFO "%s: Unsupported Winnipeg type!\n", __FUNCTION__);
return last_bus;
}
for(bus = last_bus; bus < last_bus + num_buses; bus++)
mp_bus_id_to_node[bus] = node;
return bus;
}
static int __init build_detail_arrays(void)
{
unsigned long ptr;
int i, scal_detail_size, rio_detail_size;
if (rio_table_hdr->num_scal_dev > MAX_NUMNODES){
printk(KERN_WARNING "%s: MAX_NUMNODES too low! Defined as %d, but system has %d nodes.\n", __FUNCTION__, MAX_NUMNODES, rio_table_hdr->num_scal_dev);
return 0;
}
switch (rio_table_hdr->version){
default:
printk(KERN_WARNING "%s: Invalid Rio Grande Table Version: %d\n", __FUNCTION__, rio_table_hdr->version);
return 0;
case 2:
scal_detail_size = 11;
rio_detail_size = 13;
break;
case 3:
scal_detail_size = 12;
rio_detail_size = 15;
break;
}
ptr = (unsigned long)rio_table_hdr + 3;
for(i = 0; i < rio_table_hdr->num_scal_dev; i++, ptr += scal_detail_size)
scal_devs[i] = (struct scal_detail *)ptr;
for(i = 0; i < rio_table_hdr->num_rio_dev; i++, ptr += rio_detail_size)
rio_devs[i] = (struct rio_detail *)ptr;
return 1;
}
void __init setup_summit(void)
{
unsigned long ptr;
unsigned short offset;
int i, next_wpeg, next_bus = 0;
/* The pointer to the EBDA is stored in the word @ phys 0x40E(40:0E) */
ptr = *(unsigned short *)phys_to_virt(0x40Eul);
ptr = (unsigned long)phys_to_virt(ptr << 4);
rio_table_hdr = NULL;
offset = 0x180;
while (offset){
/* The block id is stored in the 2nd word */
if (*((unsigned short *)(ptr + offset + 2)) == 0x4752){
/* set the pointer past the offset & block id */
rio_table_hdr = (struct rio_table_hdr *)(ptr + offset + 4);
break;
}
/* The next offset is stored in the 1st word. 0 means no more */
offset = *((unsigned short *)(ptr + offset));
}
if (!rio_table_hdr){
printk(KERN_ERR "%s: Unable to locate Rio Grande Table in EBDA - bailing!\n", __FUNCTION__);
return;
}
if (!build_detail_arrays())
return;
/* The first Winnipeg we're looking for has an index of 0 */
next_wpeg = 0;
do {
for(i = 0; i < rio_table_hdr->num_rio_dev; i++){
if (is_WPEG(rio_devs[i]) && rio_devs[i]->WP_index == next_wpeg){
/* It's the Winnipeg we're looking for! */
next_bus = setup_pci_node_map_for_wpeg(i, next_bus);
next_wpeg++;
break;
}
}
/*
* If we go through all Rio devices and don't find one with
* the next index, it means we've found all the Winnipegs,
* and thus all the PCI buses.
*/
if (i == rio_table_hdr->num_rio_dev)
next_wpeg = 0;
} while (next_wpeg != 0);
}
|
