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, 135 insertions, 0 deletions

diff --git a/arch/mips/sgi-ip27/ip27-xtalk.c b/arch/mips/sgi-ip27/ip27-xtalk.c
new file mode 100644
index 000000000000..fc82f34a32ce
--- /dev/null
+++ b/arch/mips/sgi-ip27/ip27-xtalk.c
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 1999, 2000 Ralf Baechle (ralf@gnu.org)
+ * Copyright (C) 1999, 2000 Silcon Graphics, Inc.
+ * Copyright (C) 2004 Christoph Hellwig.
+ *      Released under GPL v2.
+ *
+ * Generic XTALK initialization code
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/sn/types.h>
+#include <asm/sn/klconfig.h>
+#include <asm/sn/hub.h>
+#include <asm/pci/bridge.h>
+#include <asm/xtalk/xtalk.h>
+
+
+#define XBOW_WIDGET_PART_NUM    0x0
+#define XXBOW_WIDGET_PART_NUM   0xd000  /* Xbow in Xbridge */
+#define BASE_XBOW_PORT          8     /* Lowest external port */
+
+extern int bridge_probe(nasid_t nasid, int widget, int masterwid);
+
+static int __init probe_one_port(nasid_t nasid, int widget, int masterwid)
+{
+        widgetreg_t             widget_id;
+        xwidget_part_num_t      partnum;
+
+        widget_id = *(volatile widgetreg_t *)
+                (RAW_NODE_SWIN_BASE(nasid, widget) + WIDGET_ID);
+        partnum = XWIDGET_PART_NUM(widget_id);
+
+        printk(KERN_INFO "Cpu %d, Nasid 0x%x, widget 0x%x (partnum 0x%x) is ",
+                        smp_processor_id(), nasid, widget, partnum);
+
+        switch (partnum) {
+        case BRIDGE_WIDGET_PART_NUM:
+        case XBRIDGE_WIDGET_PART_NUM:
+                bridge_probe(nasid, widget, masterwid);
+                break;
+        default:
+                break;
+        }
+
+        return 0;
+}
+
+static int __init xbow_probe(nasid_t nasid)
+{
+        lboard_t *brd;
+        klxbow_t *xbow_p;
+        unsigned masterwid, i;
+
+        printk("is xbow\n");
+
+        /*
+         * found xbow, so may have multiple bridges
+         * need to probe xbow
+         */
+        brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_MIDPLANE8);
+        if (!brd)
+                return -ENODEV;
+
+        xbow_p = (klxbow_t *)find_component(brd, NULL, KLSTRUCT_XBOW);
+        if (!xbow_p)
+                return -ENODEV;
+
+        /*
+         * Okay, here's a xbow. Lets arbitrate and find
+         * out if we should initialize it. Set enabled
+         * hub connected at highest or lowest widget as
+         * master.
+         */
+#ifdef WIDGET_A
+        i = HUB_WIDGET_ID_MAX + 1;
+        do {
+                i--;
+        } while ((!XBOW_PORT_TYPE_HUB(xbow_p, i)) ||
+                 (!XBOW_PORT_IS_ENABLED(xbow_p, i)));
+#else
+        i = HUB_WIDGET_ID_MIN - 1;
+        do {
+                i++;
+        } while ((!XBOW_PORT_TYPE_HUB(xbow_p, i)) ||
+                 (!XBOW_PORT_IS_ENABLED(xbow_p, i)));
+#endif
+
+        masterwid = i;
+        if (nasid != XBOW_PORT_NASID(xbow_p, i))
+                return 1;
+
+        for (i = HUB_WIDGET_ID_MIN; i <= HUB_WIDGET_ID_MAX; i++) {
+                if (XBOW_PORT_IS_ENABLED(xbow_p, i) &&
+                    XBOW_PORT_TYPE_IO(xbow_p, i))
+                        probe_one_port(nasid, i, masterwid);
+        }
+
+        return 0;
+}
+
+void __init xtalk_probe_node(cnodeid_t nid)
+{
+        volatile u64            hubreg;
+        nasid_t                 nasid;
+        xwidget_part_num_t      partnum;
+        widgetreg_t             widget_id;
+
+        nasid = COMPACT_TO_NASID_NODEID(nid);
+        hubreg = REMOTE_HUB_L(nasid, IIO_LLP_CSR);
+
+        /* check whether the link is up */
+        if (!(hubreg & IIO_LLP_CSR_IS_UP))
+                return;
+
+        widget_id = *(volatile widgetreg_t *)
+                       (RAW_NODE_SWIN_BASE(nasid, 0x0) + WIDGET_ID);
+        partnum = XWIDGET_PART_NUM(widget_id);
+
+        printk(KERN_INFO "Cpu %d, Nasid 0x%x: partnum 0x%x is ",
+                        smp_processor_id(), nasid, partnum);
+
+        switch (partnum) {
+        case BRIDGE_WIDGET_PART_NUM:
+                bridge_probe(nasid, 0x8, 0xa);
+                break;
+        case XBOW_WIDGET_PART_NUM:
+        case XXBOW_WIDGET_PART_NUM:
+                xbow_probe(nasid);
+                break;
+        default:
+                printk(" unknown widget??\n");
+                break;
+        }
+}