Commit | Line | Data |
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1da177e4 | 1 | /* |
835c34a1 | 2 | * IBM Summit-Specific Code |
1da177e4 LT |
3 | * |
4 | * Written By: Matthew Dobson, IBM Corporation | |
5 | * | |
6 | * Copyright (c) 2003 IBM Corp. | |
7 | * | |
8 | * All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
18 | * NON INFRINGEMENT. See the GNU General Public License for more | |
19 | * details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | * | |
25 | * Send feedback to <colpatch@us.ibm.com> | |
26 | * | |
27 | */ | |
28 | ||
29 | #include <linux/mm.h> | |
30 | #include <linux/init.h> | |
31 | #include <asm/io.h> | |
356fa0c6 | 32 | #include <asm/bios_ebda.h> |
1da177e4 LT |
33 | #include <asm/mach-summit/mach_mpparse.h> |
34 | ||
35 | static struct rio_table_hdr *rio_table_hdr __initdata; | |
36 | static struct scal_detail *scal_devs[MAX_NUMNODES] __initdata; | |
37 | static struct rio_detail *rio_devs[MAX_NUMNODES*4] __initdata; | |
38 | ||
d49c4288 | 39 | #ifndef CONFIG_X86_NUMAQ |
037cab07 | 40 | static int mp_bus_id_to_node[MAX_MP_BUSSES] __initdata; |
d49c4288 | 41 | #endif |
037cab07 | 42 | |
1da177e4 LT |
43 | static int __init setup_pci_node_map_for_wpeg(int wpeg_num, int last_bus) |
44 | { | |
45 | int twister = 0, node = 0; | |
46 | int i, bus, num_buses; | |
47 | ||
60e11746 PC |
48 | for (i = 0; i < rio_table_hdr->num_rio_dev; i++) { |
49 | if (rio_devs[i]->node_id == rio_devs[wpeg_num]->owner_id) { | |
1da177e4 LT |
50 | twister = rio_devs[i]->owner_id; |
51 | break; | |
52 | } | |
53 | } | |
60e11746 | 54 | if (i == rio_table_hdr->num_rio_dev) { |
77bf90ed | 55 | printk(KERN_ERR "%s: Couldn't find owner Cyclone for Winnipeg!\n", __func__); |
1da177e4 LT |
56 | return last_bus; |
57 | } | |
58 | ||
60e11746 PC |
59 | for (i = 0; i < rio_table_hdr->num_scal_dev; i++) { |
60 | if (scal_devs[i]->node_id == twister) { | |
1da177e4 LT |
61 | node = scal_devs[i]->node_id; |
62 | break; | |
63 | } | |
64 | } | |
60e11746 | 65 | if (i == rio_table_hdr->num_scal_dev) { |
77bf90ed | 66 | printk(KERN_ERR "%s: Couldn't find owner Twister for Cyclone!\n", __func__); |
1da177e4 LT |
67 | return last_bus; |
68 | } | |
69 | ||
60e11746 | 70 | switch (rio_devs[wpeg_num]->type) { |
1da177e4 | 71 | case CompatWPEG: |
60e11746 PC |
72 | /* |
73 | * The Compatibility Winnipeg controls the 2 legacy buses, | |
1da177e4 LT |
74 | * the 66MHz PCI bus [2 slots] and the 2 "extra" buses in case |
75 | * a PCI-PCI bridge card is used in either slot: total 5 buses. | |
76 | */ | |
77 | num_buses = 5; | |
78 | break; | |
79 | case AltWPEG: | |
60e11746 PC |
80 | /* |
81 | * The Alternate Winnipeg controls the 2 133MHz buses [1 slot | |
1da177e4 LT |
82 | * each], their 2 "extra" buses, the 100MHz bus [2 slots] and |
83 | * the "extra" buses for each of those slots: total 7 buses. | |
84 | */ | |
85 | num_buses = 7; | |
86 | break; | |
87 | case LookOutAWPEG: | |
88 | case LookOutBWPEG: | |
60e11746 PC |
89 | /* |
90 | * A Lookout Winnipeg controls 3 100MHz buses [2 slots each] | |
1da177e4 LT |
91 | * & the "extra" buses for each of those slots: total 9 buses. |
92 | */ | |
93 | num_buses = 9; | |
94 | break; | |
95 | default: | |
77bf90ed | 96 | printk(KERN_INFO "%s: Unsupported Winnipeg type!\n", __func__); |
1da177e4 LT |
97 | return last_bus; |
98 | } | |
99 | ||
60e11746 | 100 | for (bus = last_bus; bus < last_bus + num_buses; bus++) |
1da177e4 LT |
101 | mp_bus_id_to_node[bus] = node; |
102 | return bus; | |
103 | } | |
104 | ||
105 | static int __init build_detail_arrays(void) | |
106 | { | |
107 | unsigned long ptr; | |
108 | int i, scal_detail_size, rio_detail_size; | |
109 | ||
60e11746 | 110 | if (rio_table_hdr->num_scal_dev > MAX_NUMNODES) { |
77bf90ed | 111 | printk(KERN_WARNING "%s: MAX_NUMNODES too low! Defined as %d, but system has %d nodes.\n", __func__, MAX_NUMNODES, rio_table_hdr->num_scal_dev); |
1da177e4 LT |
112 | return 0; |
113 | } | |
114 | ||
60e11746 | 115 | switch (rio_table_hdr->version) { |
1da177e4 | 116 | default: |
77bf90ed | 117 | printk(KERN_WARNING "%s: Invalid Rio Grande Table Version: %d\n", __func__, rio_table_hdr->version); |
1da177e4 LT |
118 | return 0; |
119 | case 2: | |
120 | scal_detail_size = 11; | |
121 | rio_detail_size = 13; | |
122 | break; | |
123 | case 3: | |
124 | scal_detail_size = 12; | |
125 | rio_detail_size = 15; | |
126 | break; | |
127 | } | |
128 | ||
129 | ptr = (unsigned long)rio_table_hdr + 3; | |
60e11746 | 130 | for (i = 0; i < rio_table_hdr->num_scal_dev; i++, ptr += scal_detail_size) |
1da177e4 LT |
131 | scal_devs[i] = (struct scal_detail *)ptr; |
132 | ||
60e11746 | 133 | for (i = 0; i < rio_table_hdr->num_rio_dev; i++, ptr += rio_detail_size) |
1da177e4 LT |
134 | rio_devs[i] = (struct rio_detail *)ptr; |
135 | ||
136 | return 1; | |
137 | } | |
138 | ||
139 | void __init setup_summit(void) | |
140 | { | |
141 | unsigned long ptr; | |
142 | unsigned short offset; | |
143 | int i, next_wpeg, next_bus = 0; | |
144 | ||
145 | /* The pointer to the EBDA is stored in the word @ phys 0x40E(40:0E) */ | |
356fa0c6 AM |
146 | ptr = get_bios_ebda(); |
147 | ptr = (unsigned long)phys_to_virt(ptr); | |
1da177e4 LT |
148 | |
149 | rio_table_hdr = NULL; | |
150 | offset = 0x180; | |
60e11746 | 151 | while (offset) { |
1da177e4 | 152 | /* The block id is stored in the 2nd word */ |
60e11746 | 153 | if (*((unsigned short *)(ptr + offset + 2)) == 0x4752) { |
1da177e4 LT |
154 | /* set the pointer past the offset & block id */ |
155 | rio_table_hdr = (struct rio_table_hdr *)(ptr + offset + 4); | |
156 | break; | |
157 | } | |
158 | /* The next offset is stored in the 1st word. 0 means no more */ | |
159 | offset = *((unsigned short *)(ptr + offset)); | |
160 | } | |
60e11746 | 161 | if (!rio_table_hdr) { |
77bf90ed | 162 | printk(KERN_ERR "%s: Unable to locate Rio Grande Table in EBDA - bailing!\n", __func__); |
1da177e4 LT |
163 | return; |
164 | } | |
165 | ||
166 | if (!build_detail_arrays()) | |
167 | return; | |
168 | ||
169 | /* The first Winnipeg we're looking for has an index of 0 */ | |
170 | next_wpeg = 0; | |
171 | do { | |
60e11746 PC |
172 | for (i = 0; i < rio_table_hdr->num_rio_dev; i++) { |
173 | if (is_WPEG(rio_devs[i]) && rio_devs[i]->WP_index == next_wpeg) { | |
1da177e4 LT |
174 | /* It's the Winnipeg we're looking for! */ |
175 | next_bus = setup_pci_node_map_for_wpeg(i, next_bus); | |
176 | next_wpeg++; | |
177 | break; | |
178 | } | |
179 | } | |
180 | /* | |
181 | * If we go through all Rio devices and don't find one with | |
182 | * the next index, it means we've found all the Winnipegs, | |
183 | * and thus all the PCI buses. | |
184 | */ | |
185 | if (i == rio_table_hdr->num_rio_dev) | |
186 | next_wpeg = 0; | |
187 | } while (next_wpeg != 0); | |
188 | } |