1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26#ifndef _VM_SEG_KPM_H 27#define _VM_SEG_KPM_H 28 29#ifdef __cplusplus 30extern "C" { 31#endif 32 33/* 34 * Kernel Physical Mapping (segkpm) segment driver. 35 */ 36 37#include <vm/kpm.h> 38 39struct segkpm_data { 40 ushort_t *skd_va_select; /* page_create_va kpm vaddr bin count */ 41 short skd_nvcolors; /* VAC colors to deal with */ 42 uchar_t skd_prot; 43}; 44 45/* 46 * segkpm create needs some platform knowledge 47 */ 48struct segkpm_crargs { 49 uint_t prot; 50 short nvcolors; /* VAC # virtual colors, 0 for PAC. */ 51}; 52 53extern struct seg *segkpm; 54extern u_offset_t kpm_pgoff; 55extern size_t kpm_pgsz; 56extern uint_t kpm_pgshft; 57extern uint_t kpmp2pshft; 58extern pgcnt_t kpmpnpgs; 59 60/* kpm controls */ 61extern int kpm_enable; 62extern int kpm_smallpages; 63extern int segmap_kpm; 64 65/* 66 * kpm_page_t macros: 67 * . bytes (b) to kpm pages (kpmp) 68 * . pages (p) to kpm pages (kpmp), and back (with and without roundup) 69 * . kpm page offset in bytes 70 * . pages (p) modulo kpm pages (kpmp) 71 */ 72#define btokpmp(x) ((x) >> kpm_pgshft) 73#define btokpmpr(x) (((x) + kpm_pgoff) >> kpm_pgshft) 74#define ptokpmp(x) ((x) >> kpmp2pshft) 75#define ptokpmpr(x) (((x) + (kpmpnpgs - 1)) >> kpmp2pshft) 76#define kpmptop(x) ((x) << kpmp2pshft) 77#define kpmpageoff(x) ((x) & kpm_pgoff) 78#define pmodkpmp(x) ((x) & (kpmpnpgs - 1)) 79 80#ifdef SEGKPM_SUPPORT 81 82#define IS_KPM_ADDR(addr) \ 83 ((addr) >= segkpm->s_base && (addr) < (segkpm->s_base + segkpm->s_size)) 84 85#ifdef __x86 86/* x86 systems use neither kpm_page_t nor kpm_spage_t when supporting kpm. */ 87#define KPMPAGE_T_SZ (0) 88#else /* __x86 */ 89#define KPMPAGE_T_SZ \ 90 ((kpm_smallpages == 0) ? sizeof (kpm_page_t) : sizeof (kpm_spage_t)) 91#endif /* __x86 */ 92 93#else /* SEGKPM_SUPPORT */ 94 95#define IS_KPM_ADDR(addr) (segkpm != NULL) 96#define KPMPAGE_T_SZ (0) 97 98#endif /* SEGKPM_SUPPORT */ 99 100#ifdef _KERNEL 101/* 102 * Public seg_kpm segment operations. 103 */ 104extern int segkpm_create(struct seg *, void *); 105extern faultcode_t segkpm_fault(struct hat *, struct seg *, caddr_t, 106 size_t, enum fault_type, enum seg_rw); 107 108/* 109 * Public seg_kpm interfaces. 110 */ 111extern caddr_t segkpm_create_va(u_offset_t); 112extern void segkpm_mapout_validkpme(struct kpme *); 113 114#endif /* _KERNEL */ 115 116#ifdef __cplusplus 117} 118#endif 119 120#endif /* _VM_SEG_KPM_H */ 121