ml_sn_init.c

来自「优龙2410linux2.6.8内核源代码」· C语言 代码 · 共 110 行

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1992 - 1997, 2000-2003 Silicon Graphics, Inc. All rights reserved.
 */

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/bootmem.h>
#include <asm/sn/sgi.h>
#include <asm/sn/io.h>
#include <asm/sn/hcl.h>
#include <asm/sn/labelcl.h>
#include <asm/sn/sn_private.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/sn_cpuid.h>
#include <asm/sn/simulator.h>

int		maxcpus;

extern xwidgetnum_t hub_widget_id(nasid_t);

/* XXX - Move the meat of this to intr.c ? */
/*
 * Set up the platform-dependent fields in the nodepda.
 */
void init_platform_nodepda(nodepda_t *npda, cnodeid_t node)
{
	hubinfo_t hubinfo;
	nasid_t nasid;

	/* Allocate per-node platform-dependent data */
	
	nasid = cnodeid_to_nasid(node);
	if (node >= numnodes) /* Headless/memless IO nodes */
		hubinfo = (hubinfo_t)alloc_bootmem_node(NODE_DATA(0), sizeof(struct hubinfo_s));
	else
		hubinfo = (hubinfo_t)alloc_bootmem_node(NODE_DATA(node), sizeof(struct hubinfo_s));

	npda->pdinfo = (void *)hubinfo;
	hubinfo->h_nodepda = npda;
	hubinfo->h_cnodeid = node;

	spin_lock_init(&hubinfo->h_crblock);

	npda->xbow_peer = INVALID_NASID;

	/* 
	 * Initialize the linked list of
	 * router info pointers to the dependent routers
	 */
	npda->npda_rip_first = NULL;

	/*
	 * npda_rip_last always points to the place
	 * where the next element is to be inserted
	 * into the list 
	 */
	npda->npda_rip_last = &npda->npda_rip_first;
	npda->geoid.any.type = GEO_TYPE_INVALID;

	init_MUTEX_LOCKED(&npda->xbow_sema); /* init it locked? */
}

void
init_platform_hubinfo(nodepda_t **nodepdaindr)
{
	cnodeid_t       cnode;
	hubinfo_t hubinfo;
	nodepda_t *npda;
	extern int numionodes;

	if (IS_RUNNING_ON_SIMULATOR())
		return;
	for (cnode = 0; cnode < numionodes; cnode++) {
		npda = nodepdaindr[cnode];
		hubinfo = (hubinfo_t)npda->pdinfo;
		hubinfo->h_nasid = cnodeid_to_nasid(cnode);
		hubinfo->h_widgetid = hub_widget_id(hubinfo->h_nasid);
	}
}

void
update_node_information(cnodeid_t cnodeid)
{
	nodepda_t *npda = NODEPDA(cnodeid);
	nodepda_router_info_t *npda_rip;
	
	/* Go through the list of router info 
	 * structures and copy some frequently
	 * accessed info from the info hanging
	 * off the corresponding router vertices
	 */
	npda_rip = npda->npda_rip_first;
	while(npda_rip) {
		if (npda_rip->router_infop) {
			npda_rip->router_portmask = 
				npda_rip->router_infop->ri_portmask;
			npda_rip->router_slot = 
				npda_rip->router_infop->ri_slotnum;
		} else {
			/* No router, no ports. */
			npda_rip->router_portmask = 0;
		}
		npda_rip = npda_rip->router_next;
	}
}