135 lines
3 KiB
C
135 lines
3 KiB
C
/*
|
|
* 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 __cpuinit 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 __cpuinit 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 __cpuinit 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;
|
|
}
|
|
}
|