/******************************************************************************/
/* */
/* Copyright (c) 1999 Sun Microsystems, Inc. All rights reserved. */
/* */
/* The contents of this file are subject to the current version of the Sun */
/* Community Source License, microSPARCII ("the License"). You may not use */
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/* Sun, Sun Microsystems, the Sun logo, all Sun-based trademarks and logos, */
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/* */
/******************************************************************************/
// @(#)iotlb_defs.v 1.2 8/21/91
//******************** define IOTLB size parameters
`define IOTLBENTRIES 16
`define IOTLBTAG_WIDTH 42
`define IOTLBDATA_WIDTH 28
//******************** define IOTLB tag entry
// An IMASK bit =1 indicates that the corresponding INDEX field
// should be ignored.
// A SUPERVISOR bit =1 indicates that a context match is NOT required.
/*********************************************************************************/
/** IOTLB TAG hardware representation **/
/** **/
/** +---+---+---------+--+-------+--+-------+-----------+---+---+---+---+---+---+---+---+---+---+ **/
/** | V |L1 | INDX1 |L2| INDX2 |L3| INDX3 | Context | UE| UR| UW| SE| SR| SW| S | IO| P | M | **/
/** +---+---+---------+--+-------+--+-------+-----------+---+---+---+---+---+---+---+---+---+---+ **/
/** 41 40 39 32 31 30 25 24 23 18 17 10 9 8 7 6 5 4 3 2 1 0 **/
/** +---+---+---------+--+-------+--+-------+-----------+---+---+---+---+---+---+---+---+---+---+ **/
/** | V |L1 | INDX1 |L2| INDX2 |L3| INDX3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | **/
/** +---+---+---------+--+-------+--+-------+-----------+---+---+---+---+---+---+---+---+---+---+ **/
/*********************************************************************************/
`define VALIDBIT 41 /* V-bit tlb_tag[31] */
`define IMASK0 40 /* level bit 1 tlb_tag[33] */
/* this is used to clear all */
`define IMASK1 31 /* Level bit 2 tlb_tag[22] */
`define IMASK2 24 /* Level bit 3 tlb_tag[15] */
`define INDEX1 39:32 /* Virtual tag index 1 tlb_tag[30:23] */
`define INDEX2 30:25 /* Virtual tag index 2 tlb_tag[21:16] */
`define INDEX3 23:18 /* Virtual tag index 3 tlb_tag[14:09] */
`define CONTEXT 17:10 /* Context tlb_tag[08:03] */
`define SUPERVISOR 3 /* S-bit tlb_tag[02] */
`define IO_PTE 2 /* IO-bit tlb_tag[01] */
`define PTP_BIT 1 /* PTP-bit tlb_tag[00] */
`define UE 9
`define UR 8
`define UW 7
`define SE 6
`define SR 5
`define SW 4
`define M 0
//******************** define IOTLB data entry types
/*************************************************************************/
/** IOTLB DATA representation **/
/** **/
/** PTE **/
/** +-----+-------------------------*---+---+---+---+-----------+ **/
/** |lvl |Physical Page Number (PPN) | C | M | 1 | ACC | **/
/** +-----+-----------------------------+---+---+---+-----------+ **/
/** 27 25 24 6 5 4 3 2 0 **/
/** **/
/** IOPTE **/
/** +--------------------------------+---+---+---+---+---+---+ **/
/** | Physical Page Number (PPN) | 0 | 0 | 0 | 0 | 0 | W | **/
/** +--------------------------------+---+---+---+---+---+---+ **/
/** 24 6 5 4 3 2 1 0 **/
/** **/
/** PTP **/
/** +------------------------------------------------+---+---+ **/
/** | Page Table Pointer (PTP) | 0 | 0 | **/
/** +------------------------------------------------+---+---+ **/
/** 24 2 1 0 **/
/** **/
/*************************************************************************/
// **** define PTE entry fields
`define PPN 24:6
`define C_BIT 5 /* Cacheable bit */
`define MOD_BIT 4 /* Modified bit */
`define REF_BIT 3 /* Reference Bit - a "1" indicates an PTE */
`define ACCESS 2:0 /* Access field */
// **** define IOPTE entry fields
`define W_BIT 0
`define IO_BIT 3 /* Reference Bit - a "0" indicates an IOPTE */
// **** define PTP entry fields
`define PTP 24:2
// **** define LVL entry field
`define LVL 27:25
// **** define CLR_MASK to be used to flush entire IOTLB
`define CLR_MASK 42'h1ffffffffff
This page: |
Created: | Thu Aug 19 12:01:05 1999 |
| From: |
../../../sparc_v8/ssparc/pcic/afxmaster/rtl/iotlb_defs.h
|