gru.h
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/*
* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __GRU_H__
#define __GRU_H__
/*
* GRU architectural definitions
*/
#define GRU_CACHE_LINE_BYTES 64
#define GRU_HANDLE_STRIDE 256
#define GRU_CB_BASE 0
#define GRU_DS_BASE 0x20000
/*
* Size used to map GRU GSeg
*/
#if defined(CONFIG_IA64)
#define GRU_GSEG_PAGESIZE (256 * 1024UL)
#elif defined(CONFIG_X86_64)
#define GRU_GSEG_PAGESIZE (256 * 1024UL) /* ZZZ 2MB ??? */
#else
#error "Unsupported architecture"
#endif
/*
* Structure for obtaining GRU resource information
*/
struct gru_chiplet_info {
int node;
int chiplet;
int blade;
int total_dsr_bytes;
int total_cbr;
int total_user_dsr_bytes;
int total_user_cbr;
int free_user_dsr_bytes;
int free_user_cbr;
};
/*
* Statictics kept for each context.
*/
struct gru_gseg_statistics {
unsigned long fmm_tlbmiss;
unsigned long upm_tlbmiss;
unsigned long tlbdropin;
unsigned long context_stolen;
unsigned long reserved[10];
};
/* Flags for GRU options on the gru_create_context() call */
/* Select one of the follow 4 options to specify how TLB misses are handled */
#define GRU_OPT_MISS_DEFAULT 0x0000 /* Use default mode */
#define GRU_OPT_MISS_USER_POLL 0x0001 /* User will poll CB for faults */
#define GRU_OPT_MISS_FMM_INTR 0x0002 /* Send interrupt to cpu to
handle fault */
#define GRU_OPT_MISS_FMM_POLL 0x0003 /* Use system polling thread */
#define GRU_OPT_MISS_MASK 0x0003 /* Mask for TLB MISS option */
#endif /* __GRU_H__ */