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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/x86/kernel/summit_32.c
2 * IBM Summit-Specific Code
4 * Written By: Matthew Dobson, IBM Corporation
6 * Copyright (c) 2003 IBM Corp.
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.
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
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.
25 * Send feedback to <colpatch@us.ibm.com>
30 #include <linux/init.h>
32 #include <asm/bios_ebda.h>
33 #include <asm/summit/mpparse.h>
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
;
39 #ifndef CONFIG_X86_NUMAQ
40 static int mp_bus_id_to_node
[MAX_MP_BUSSES
] __initdata
;
43 static int __init
setup_pci_node_map_for_wpeg(int wpeg_num
, int last_bus
)
45 int twister
= 0, node
= 0;
46 int i
, bus
, num_buses
;
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
) {
50 twister
= rio_devs
[i
]->owner_id
;
54 if (i
== rio_table_hdr
->num_rio_dev
) {
55 printk(KERN_ERR
"%s: Couldn't find owner Cyclone for Winnipeg!\n", __func__
);
59 for (i
= 0; i
< rio_table_hdr
->num_scal_dev
; i
++) {
60 if (scal_devs
[i
]->node_id
== twister
) {
61 node
= scal_devs
[i
]->node_id
;
65 if (i
== rio_table_hdr
->num_scal_dev
) {
66 printk(KERN_ERR
"%s: Couldn't find owner Twister for Cyclone!\n", __func__
);
70 switch (rio_devs
[wpeg_num
]->type
) {
73 * The Compatibility Winnipeg controls the 2 legacy buses,
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.
81 * The Alternate Winnipeg controls the 2 133MHz buses [1 slot
82 * each], their 2 "extra" buses, the 100MHz bus [2 slots] and
83 * the "extra" buses for each of those slots: total 7 buses.
90 * A Lookout Winnipeg controls 3 100MHz buses [2 slots each]
91 * & the "extra" buses for each of those slots: total 9 buses.
96 printk(KERN_INFO
"%s: Unsupported Winnipeg type!\n", __func__
);
100 for (bus
= last_bus
; bus
< last_bus
+ num_buses
; bus
++)
101 mp_bus_id_to_node
[bus
] = node
;
105 static int __init
build_detail_arrays(void)
108 int i
, scal_detail_size
, rio_detail_size
;
110 if (rio_table_hdr
->num_scal_dev
> MAX_NUMNODES
) {
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
);
115 switch (rio_table_hdr
->version
) {
117 printk(KERN_WARNING
"%s: Invalid Rio Grande Table Version: %d\n", __func__
, rio_table_hdr
->version
);
120 scal_detail_size
= 11;
121 rio_detail_size
= 13;
124 scal_detail_size
= 12;
125 rio_detail_size
= 15;
129 ptr
= (unsigned long)rio_table_hdr
+ 3;
130 for (i
= 0; i
< rio_table_hdr
->num_scal_dev
; i
++, ptr
+= scal_detail_size
)
131 scal_devs
[i
] = (struct scal_detail
*)ptr
;
133 for (i
= 0; i
< rio_table_hdr
->num_rio_dev
; i
++, ptr
+= rio_detail_size
)
134 rio_devs
[i
] = (struct rio_detail
*)ptr
;
139 void __init
setup_summit(void)
142 unsigned short offset
;
143 int i
, next_wpeg
, next_bus
= 0;
145 /* The pointer to the EBDA is stored in the word @ phys 0x40E(40:0E) */
146 ptr
= get_bios_ebda();
147 ptr
= (unsigned long)phys_to_virt(ptr
);
149 rio_table_hdr
= NULL
;
152 /* The block id is stored in the 2nd word */
153 if (*((unsigned short *)(ptr
+ offset
+ 2)) == 0x4752) {
154 /* set the pointer past the offset & block id */
155 rio_table_hdr
= (struct rio_table_hdr
*)(ptr
+ offset
+ 4);
158 /* The next offset is stored in the 1st word. 0 means no more */
159 offset
= *((unsigned short *)(ptr
+ offset
));
161 if (!rio_table_hdr
) {
162 printk(KERN_ERR
"%s: Unable to locate Rio Grande Table in EBDA - bailing!\n", __func__
);
166 if (!build_detail_arrays())
169 /* The first Winnipeg we're looking for has an index of 0 */
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
) {
174 /* It's the Winnipeg we're looking for! */
175 next_bus
= setup_pci_node_map_for_wpeg(i
, next_bus
);
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.
185 if (i
== rio_table_hdr
->num_rio_dev
)
187 } while (next_wpeg
!= 0);