sgi_io_init.c

linux-2.4.29操作系统的源码

/*
 * 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/config.h>
#include <linux/slab.h>
#include <asm/sn/sgi.h>
#include <asm/sn/io.h>
#include <asm/sn/sn_cpuid.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/sn_private.h>
#include <asm/sn/pda.h>
#include <linux/smp.h>

extern int init_hcl(void);

/*
 * per_hub_init
 *
 * 	This code is executed once for each Hub chip.
 */
void
per_hub_init(cnodeid_t cnode)
{
	nasid_t		nasid;
	nodepda_t	*npdap;
	ii_icmr_u_t	ii_icmr;
	ii_ibcr_u_t	ii_ibcr;
	ii_ilcsr_u_t	ii_ilcsr;

	nasid = COMPACT_TO_NASID_NODEID(cnode);

	ASSERT(nasid != INVALID_NASID);
	ASSERT(NASID_TO_COMPACT_NODEID(nasid) == cnode);

	npdap = NODEPDA(cnode);

	/* Disable the request and reply errors. */
	REMOTE_HUB_S(nasid, IIO_IWEIM, 0xC000);

	/*
	 * Set the total number of CRBs that can be used.
	 */
	ii_icmr.ii_icmr_regval= 0x0;
	ii_icmr.ii_icmr_fld_s.i_c_cnt = 0xf;
	if (enable_shub_wars_1_1() ) {
		// Set bit one of ICMR to prevent II from sending interrupt for II bug.
		ii_icmr.ii_icmr_regval |= 0x1; 
	}
	REMOTE_HUB_S(nasid, IIO_ICMR, ii_icmr.ii_icmr_regval);

	/*
	 * Set the number of CRBs that both of the BTEs combined
	 * can use minus 1.
	 */
	ii_ibcr.ii_ibcr_regval= 0x0;
	ii_ilcsr.ii_ilcsr_regval = REMOTE_HUB_L(nasid, IIO_LLP_CSR);
	if (ii_ilcsr.ii_ilcsr_fld_s.i_llp_stat & LNK_STAT_WORKING) {
	    ii_ibcr.ii_ibcr_fld_s.i_count = 0x8;
	} else {
	    /*
	     * if the LLP is down, there is no attached I/O, so
	    * give BTE all the CRBs.
	    */
	    ii_ibcr.ii_ibcr_fld_s.i_count = 0x14;
	}
	REMOTE_HUB_S(nasid, IIO_IBCR, ii_ibcr.ii_ibcr_regval);

	/*
	 * Set CRB timeout to be 10ms.
	 */
	REMOTE_HUB_S(nasid, IIO_ICTP, 0xffffff );
	REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);

	/* Initialize error interrupts for this hub. */
	hub_error_init(cnode);
}

/*
 * This routine is responsible for the setup of all the IRIX hwgraph style
 * stuff that's been pulled into linux.  It's called by sn_pci_find_bios which
 * is called just before the generic Linux PCI layer does its probing (by 
 * platform_pci_fixup aka sn_pci_fixup).
 *
 * It is very IMPORTANT that this call is only made by the Master CPU!
 *
 */

void
sgi_master_io_infr_init(void)
{
	extern void irix_io_init(void);

	init_hcl(); /* Sets up the hwgraph compatibility layer with devfs */
	irix_io_init(); /* Do IRIX Compatibility IO Init */

#ifdef	CONFIG_KDB
	{
		extern void kdba_io_init(void);
		kdba_io_init();
	}
#endif

}