Linux-2.6.12-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!
diff --git a/arch/mips/sgi-ip27/ip27-xtalk.c b/arch/mips/sgi-ip27/ip27-xtalk.c
new file mode 100644
index 0000000..fc82f34
--- /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;
+ }
+}