1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #ifndef _SYS_VMEM_H 28*0Sstevel@tonic-gate #define _SYS_VMEM_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #include <sys/types.h> 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate #ifdef __cplusplus 35*0Sstevel@tonic-gate extern "C" { 36*0Sstevel@tonic-gate #endif 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate /* 40*0Sstevel@tonic-gate * Per-allocation flags 41*0Sstevel@tonic-gate */ 42*0Sstevel@tonic-gate #define VM_SLEEP 0x00000000 /* same as KM_SLEEP */ 43*0Sstevel@tonic-gate #define VM_NOSLEEP 0x00000001 /* same as KM_NOSLEEP */ 44*0Sstevel@tonic-gate #define VM_PANIC 0x00000002 /* same as KM_PANIC */ 45*0Sstevel@tonic-gate #define VM_PUSHPAGE 0x00000004 /* same as KM_PUSHPAGE */ 46*0Sstevel@tonic-gate #define VM_KMFLAGS 0x000000ff /* flags that must match KM_* flags */ 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate #define VM_BESTFIT 0x00000100 49*0Sstevel@tonic-gate #define VM_FIRSTFIT 0x00000200 50*0Sstevel@tonic-gate #define VM_NEXTFIT 0x00000400 51*0Sstevel@tonic-gate 52*0Sstevel@tonic-gate /* 53*0Sstevel@tonic-gate * The following flags are restricted for use only within the kernel. 54*0Sstevel@tonic-gate * VM_MEMLOAD is for use by the HAT to avoid infinite recursion. 55*0Sstevel@tonic-gate * VM_NORELOC is used by the kernel when static VA->PA mappings are required. 56*0Sstevel@tonic-gate */ 57*0Sstevel@tonic-gate #define VM_MEMLOAD 0x00000800 58*0Sstevel@tonic-gate #define VM_NORELOC 0x00001000 59*0Sstevel@tonic-gate /* 60*0Sstevel@tonic-gate * VM_ABORT requests that vmem_alloc() *ignore* the VM_SLEEP/VM_NOSLEEP flags 61*0Sstevel@tonic-gate * and forgo reaping if the allocation or attempted import, fails. This 62*0Sstevel@tonic-gate * flag is a segkmem-specific flag, and should not be used by anyone else. 63*0Sstevel@tonic-gate */ 64*0Sstevel@tonic-gate #define VM_ABORT 0x00002000 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate #define VM_FLAGS 0x0000FFFF 67*0Sstevel@tonic-gate 68*0Sstevel@tonic-gate /* 69*0Sstevel@tonic-gate * Arena creation flags 70*0Sstevel@tonic-gate */ 71*0Sstevel@tonic-gate #define VMC_POPULATOR 0x00010000 72*0Sstevel@tonic-gate #define VMC_NO_QCACHE 0x00020000 /* cannot use quantum caches */ 73*0Sstevel@tonic-gate #define VMC_IDENTIFIER 0x00040000 /* not backed by memory */ 74*0Sstevel@tonic-gate /* 75*0Sstevel@tonic-gate * internal use only; the import function uses the vmem_ximport_t interface 76*0Sstevel@tonic-gate * and may increase the request size if it so desires 77*0Sstevel@tonic-gate */ 78*0Sstevel@tonic-gate #define VMC_XALLOC 0x00080000 79*0Sstevel@tonic-gate #define VMC_FLAGS 0xFFFF0000 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate /* 82*0Sstevel@tonic-gate * Public segment types 83*0Sstevel@tonic-gate */ 84*0Sstevel@tonic-gate #define VMEM_ALLOC 0x01 85*0Sstevel@tonic-gate #define VMEM_FREE 0x02 86*0Sstevel@tonic-gate 87*0Sstevel@tonic-gate /* 88*0Sstevel@tonic-gate * Implementation-private segment types 89*0Sstevel@tonic-gate */ 90*0Sstevel@tonic-gate #define VMEM_SPAN 0x10 91*0Sstevel@tonic-gate #define VMEM_ROTOR 0x20 92*0Sstevel@tonic-gate #define VMEM_WALKER 0x40 93*0Sstevel@tonic-gate 94*0Sstevel@tonic-gate /* 95*0Sstevel@tonic-gate * VMEM_REENTRANT indicates to vmem_walk() that the callback routine may 96*0Sstevel@tonic-gate * call back into the arena being walked, so vmem_walk() must drop the 97*0Sstevel@tonic-gate * arena lock before each callback. The caveat is that since the arena 98*0Sstevel@tonic-gate * isn't locked, its state can change. Therefore it is up to the callback 99*0Sstevel@tonic-gate * routine to handle cases where the segment isn't of the expected type. 100*0Sstevel@tonic-gate * For example, we use this to walk heap_arena when generating a crash dump; 101*0Sstevel@tonic-gate * see segkmem_dump() for sample usage. 102*0Sstevel@tonic-gate */ 103*0Sstevel@tonic-gate #define VMEM_REENTRANT 0x80000000 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate typedef struct vmem vmem_t; 106*0Sstevel@tonic-gate typedef void *(vmem_alloc_t)(vmem_t *, size_t, int); 107*0Sstevel@tonic-gate typedef void (vmem_free_t)(vmem_t *, void *, size_t); 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate /* 110*0Sstevel@tonic-gate * Alternate import style; the requested size is passed in a pointer, 111*0Sstevel@tonic-gate * which can be increased by the import function if desired. 112*0Sstevel@tonic-gate */ 113*0Sstevel@tonic-gate typedef void *(vmem_ximport_t)(vmem_t *, size_t *, int); 114*0Sstevel@tonic-gate 115*0Sstevel@tonic-gate #ifdef _KERNEL 116*0Sstevel@tonic-gate extern vmem_t *vmem_init(const char *, void *, size_t, size_t, 117*0Sstevel@tonic-gate vmem_alloc_t *, vmem_free_t *); 118*0Sstevel@tonic-gate extern void vmem_update(void *); 119*0Sstevel@tonic-gate extern int vmem_is_populator(); 120*0Sstevel@tonic-gate extern size_t vmem_seg_size; 121*0Sstevel@tonic-gate #endif 122*0Sstevel@tonic-gate 123*0Sstevel@tonic-gate extern vmem_t *vmem_create(const char *, void *, size_t, size_t, 124*0Sstevel@tonic-gate vmem_alloc_t *, vmem_free_t *, vmem_t *, size_t, int); 125*0Sstevel@tonic-gate extern vmem_t *vmem_xcreate(const char *, void *, size_t, size_t, 126*0Sstevel@tonic-gate vmem_ximport_t *, vmem_free_t *, vmem_t *, size_t, int); 127*0Sstevel@tonic-gate extern void vmem_destroy(vmem_t *); 128*0Sstevel@tonic-gate extern void *vmem_alloc(vmem_t *, size_t, int); 129*0Sstevel@tonic-gate extern void *vmem_xalloc(vmem_t *, size_t, size_t, size_t, size_t, 130*0Sstevel@tonic-gate void *, void *, int); 131*0Sstevel@tonic-gate extern void vmem_free(vmem_t *, void *, size_t); 132*0Sstevel@tonic-gate extern void vmem_xfree(vmem_t *, void *, size_t); 133*0Sstevel@tonic-gate extern void *vmem_add(vmem_t *, void *, size_t, int); 134*0Sstevel@tonic-gate extern int vmem_contains(vmem_t *, void *, size_t); 135*0Sstevel@tonic-gate extern void vmem_walk(vmem_t *, int, void (*)(void *, void *, size_t), void *); 136*0Sstevel@tonic-gate extern size_t vmem_size(vmem_t *, int); 137*0Sstevel@tonic-gate 138*0Sstevel@tonic-gate #ifdef __cplusplus 139*0Sstevel@tonic-gate } 140*0Sstevel@tonic-gate #endif 141*0Sstevel@tonic-gate 142*0Sstevel@tonic-gate #endif /* _SYS_VMEM_H */ 143