projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * The contents of this file constitute Original Code as defined in and | |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the | |
| 8 | * "License"). You may not use this file except in compliance with the | |
| 9 | * License. Please obtain a copy of the License at | |
| 10 | * http://www.apple.com/publicsource and read it before using this file. | |
| 11 | * | |
| 12 | * This Original Code and all software distributed under the License are | |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the | |
| 17 | * License for the specific language governing rights and limitations | |
| 18 | * under the License. | |
| 19 | * | |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | /* | |
| 23 | * @OSF_COPYRIGHT@ | |
| 24 | */ | |
| 25 | ||
| 26 | /* A marvelous selection of support routines for virtual memory */ | |
| 27 | ||
| 28 | #include <cpus.h> | |
| 29 | #include <debug.h> | |
| 30 | #include <mach_kdb.h> | |
| 31 | #include <mach_vm_debug.h> | |
| 32 | ||
| 33 | #include <kern/cpu_number.h> | |
| 34 | #include <kern/misc_protos.h> | |
| 35 | #include <kern/assert.h> | |
| 36 | #include <ppc/misc_protos.h> | |
| 37 | #include <ppc/mem.h> | |
| 38 | #include <ppc/pmap_internals.h> /* For pmap_pteg_overflow */ | |
| 39 | ||
| 40 | /* These refer to physical addresses and are set and referenced elsewhere */ | |
| 41 | ||
| 42 | unsigned int hash_table_base; | |
| 43 | unsigned int hash_table_size; | |
| 44 | ||
| 45 | unsigned int hash_function_mask; | |
| 46 | ||
| 47 | struct shadowBAT shadow_BAT; | |
| 48 | ||
| 49 | /* gather statistics about hash table usage */ | |
| 50 | ||
| 51 | #if DEBUG | |
| 52 | #define MEM_STATS 1 | |
| 53 | #else | |
| 54 | #define MEM_STATS 0 | |
| 55 | #endif /* DEBUG */ | |
| 56 | ||
| 57 | #if MEM_STATS | |
| 58 | /* hash table usage information */ | |
| 59 | struct hash_table_stats { | |
| 60 | int find_pte_in_pteg_calls; | |
| 61 | int find_pte_in_pteg_not_found; | |
| 62 | int find_pte_in_pteg_location[8]; | |
| 63 | struct find_or_alloc_calls { | |
| 64 | int found_primary; | |
| 65 | int found_secondary; | |
| 66 | int alloc_primary; | |
| 67 | int alloc_secondary; | |
| 68 | int overflow; | |
| 69 | int not_found; | |
| 70 | } find_or_alloc_calls[2]; | |
| 71 | ||
| 72 | } hash_table_stats[NCPUS]; | |
| 73 | ||
| 74 | #define INC_STAT(LOC) \ | |
| 75 | hash_table_stats[cpu_number()].find_pte_in_pteg_location[LOC]++ | |
| 76 | ||
| 77 | #else /* MEM_STATS */ | |
| 78 | #define INC_STAT(LOC) | |
| 79 | #endif /* MEM_STATS */ | |
| 80 | ||
| 81 | /* Set up the machine registers for the given hash table. | |
| 82 | * The table has already been zeroed. | |
| 83 | */ | |
| 84 | void hash_table_init(unsigned int base, unsigned int size) | |
| 85 | { | |
| 86 | sync(); /* SYNC: it's not just the law, it's a good idea... */ | |
| 87 | mtsdr1(hash_table_base | ((size-1)>>16)); /* Slam the SDR1 with the has table address */ | |
| 88 | sync(); /* SYNC: it's not just the law, it's a good idea... */ | |
| 89 | isync(); | |
| 90 | } | |
| 91 |