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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _VM_SEG_KMEM_H 28 #define _VM_SEG_KMEM_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include <sys/types.h> 37 #include <sys/vnode.h> 38 #include <sys/vmem.h> 39 #include <vm/as.h> 40 #include <vm/seg.h> 41 #include <vm/page.h> 42 43 /* 44 * VM - Kernel Segment Driver 45 */ 46 47 #if defined(_KERNEL) 48 49 extern char *kernelheap; /* start of primary kernel heap */ 50 extern char *ekernelheap; /* end of primary kernel heap */ 51 extern char *heap_lp_base; /* start of kernel large page heap arena */ 52 extern char *heap_lp_end; /* end of kernel large page heap arena */ 53 extern struct seg kvseg; /* primary kernel heap segment */ 54 extern struct seg kvseg_core; /* "core" kernel heap segment */ 55 extern vmem_t *heap_lp_arena; /* kernel large page heap arena */ 56 extern vmem_t *heap_arena; /* primary kernel heap arena */ 57 extern vmem_t *hat_memload_arena; /* HAT translation arena */ 58 extern struct seg kvseg32; /* 32-bit kernel heap segment */ 59 extern vmem_t *heap32_arena; /* 32-bit kernel heap arena */ 60 extern vmem_t *heaptext_arena; /* kernel text arena, from heap */ 61 extern struct ctx *kctx; /* kernel context */ 62 extern struct as kas; /* kernel address space */ 63 extern struct vnode kvp; /* vnode for all segkmem pages */ 64 extern int segkmem_reloc; /* enable/disable segkmem relocatable pages */ 65 extern vmem_t *static_arena; /* arena for caches to import static memory */ 66 extern vmem_t *static_alloc_arena; /* arena for allocating static memory */ 67 68 extern int segkmem_create(struct seg *); 69 extern page_t *segkmem_page_create(void *, size_t, int, void *); 70 extern void *segkmem_xalloc(vmem_t *, void *, size_t, int, uint_t, 71 page_t *(*page_create_func)(void *, size_t, int, void *), void *); 72 extern void *segkmem_alloc(vmem_t *, size_t, int); 73 extern void *segkmem_alloc_permanent(vmem_t *, size_t, int); 74 extern void segkmem_free(vmem_t *, void *, size_t); 75 76 extern void *boot_alloc(void *, size_t, uint_t); 77 extern void boot_mapin(caddr_t addr, size_t size); 78 extern void kernelheap_init(void *, void *, char *, void *, void *); 79 extern void kernelheap_extend(void *, void *); 80 extern void segkmem_gc(void); 81 82 /* 83 * Flags for segkmem_xalloc(). 84 * 85 * SEGKMEM_SHARELOCKED requests pages which are locked SE_SHARED to be 86 * returned rather than unlocked which is now the default. Note that 87 * memory returned by SEGKMEM_SHARELOCKED cannot be freed by segkmem_free(). 88 * This is a hack for seg_dev that should be cleaned up in the future. 89 */ 90 #define SEGKMEM_SHARELOCKED 0x20000 91 92 /* 93 * Large page for kmem caches support 94 */ 95 typedef struct segkmem_lpcb { 96 kmutex_t lp_lock; 97 kcondvar_t lp_cv; 98 uint_t lp_wait; 99 uint_t lp_uselp; 100 ulong_t lp_throttle; 101 102 /* stats */ 103 uint64_t sleep_allocs_failed; 104 uint64_t nosleep_allocs_failed; 105 uint64_t allocs_throttled; 106 uint64_t allocs_limited; 107 uint64_t alloc_bytes_failed; 108 } segkmem_lpcb_t; 109 110 extern void *segkmem_alloc_lp(vmem_t *, size_t *, int); 111 extern void segkmem_free_lp(vmem_t *, void *, size_t); 112 extern int segkmem_lpsetup(); 113 extern void segkmem_heap_lp_init(void); 114 115 extern size_t segkmem_lpsize; 116 extern size_t segkmem_heaplp_quantum; 117 extern size_t segkmem_kmemlp_max; 118 119 #define SEGKMEM_USE_LARGEPAGES (segkmem_lpsize > PAGESIZE) 120 121 #define IS_KMEM_VA_LARGEPAGE(vaddr) \ 122 (((vaddr) >= heap_lp_base) && ((vaddr) < heap_lp_end)) 123 124 #endif /* _KERNEL */ 125 126 #ifdef __cplusplus 127 } 128 #endif 129 130 #endif /* _VM_SEG_KMEM_H */ 131