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 30 extern "C" { 31 #endif 32 33 /* 34 * Kernel Physical Mapping (segkpm) segment driver. 35 */ 36 37 #include <vm/kpm.h> 38 39 struct 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 */ 48 struct segkpm_crargs { 49 uint_t prot; 50 short nvcolors; /* VAC # virtual colors, 0 for PAC. */ 51 }; 52 53 extern struct seg *segkpm; 54 extern u_offset_t kpm_pgoff; 55 extern size_t kpm_pgsz; 56 extern uint_t kpm_pgshft; 57 extern uint_t kpmp2pshft; 58 extern pgcnt_t kpmpnpgs; 59 60 /* kpm controls */ 61 extern int kpm_enable; 62 extern int kpm_smallpages; 63 extern 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 */ 104 extern int segkpm_create(struct seg *, void *); 105 extern 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 */ 111 extern caddr_t segkpm_create_va(u_offset_t); 112 extern 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