linux/arch/x86/kernel/summit_32.c
Yinghai Lu d49c428840 x86: make generic arch support NUMAQ
... so it could fall back to normal numa and we'd reduce the impact of the
NUMAQ subarch.

NUMAQ depends on GENERICARCH
also decouple genericarch numa from acpi.
also make it fall back to bigsmp if apicid > 8.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-10 11:34:42 +02:00

189 lines
5.2 KiB
C

/*
* 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/bios_ebda.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;
#ifndef CONFIG_X86_NUMAQ
static int mp_bus_id_to_node[MAX_MP_BUSSES] __initdata;
#endif
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", __func__);
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", __func__);
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", __func__);
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", __func__, 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", __func__, 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 = get_bios_ebda();
ptr = (unsigned long)phys_to_virt(ptr);
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", __func__);
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);
}