Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 180 insertions, 0 deletions

diff --git a/arch/i386/kernel/summit.c b/arch/i386/kernel/summit.c
new file mode 100644
index 000000000000..d0e01a3acf35
--- /dev/null
+++ b/arch/i386/kernel/summit.c
@@ -0,0 +1,180 @@
+/*
+ * arch/i386/kernel/summit.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/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 Compatability 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);
+}