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Annotation of XNU/osfmk/ppc/pmap_internals.h, revision 1.1.1.1

1.1       root        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: /* Things that don't need to be exported from pmap. Putting
                     27:  * them here and not in pmap.h avoids major recompiles when
                     28:  * modifying something either here or in proc_reg.h
                     29:  */
                     30: 
                     31: #ifndef _PMAP_INTERNALS_H_
                     32: #define _PMAP_INTERNALS_H_
                     33: 
                     34: /*
                     35:  *     Definition of the flags in the low 5 bits of the phys_link field of the phys_entry
                     36:  */
                     37:  
                     38: #define PHYS_LOCK      0x00000001
                     39: #define PHYS_FLAGS     0x0000001F
                     40: 
                     41: #ifndef ASSEMBLER
                     42: 
                     43: #include <cpus.h>
                     44: #include <mach_ldebug.h>
                     45: #include <debug.h>
                     46: 
                     47: #include <mach/vm_types.h>
                     48: #include <mach/machine/vm_types.h>
                     49: #include <mach/vm_prot.h>
                     50: #include <mach/vm_statistics.h>
                     51: #include <kern/assert.h>
                     52: #include <kern/cpu_number.h>
                     53: #include <kern/lock.h>
                     54: #include <kern/queue.h>
                     55: #include <ppc/proc_reg.h>
                     56: 
                     57: 
                     58: /* Page table entries are stored in groups (PTEGS) in a hash table */
                     59: 
                     60: #if __PPC__
                     61: #if _BIG_ENDIAN == 0
                     62: error - bitfield structures are not checked for bit ordering in words
                     63: #endif /* _BIG_ENDIAN */
                     64: #endif /* __PPC__ */
                     65: 
                     66: /*
                     67:  * Don't change these structures unless you change the assembly code
                     68:  */
                     69: 
                     70: struct phys_entry {
                     71:        struct mapping  *phys_link;             /* MUST BE FIRST - chain of mappings and flags in the low 5 bits, see above */
                     72:        unsigned int    pte1;                   /* referenced/changed/wimg - info update atomically */
                     73: };
                     74: 
                     75:  
                     76: #define PHYS_NULL      ((struct phys_entry *)0)
                     77: 
                     78: /* Memory may be non-contiguous. This data structure contains info
                     79:  * for mapping this non-contiguous space into the contiguous
                     80:  * physical->virtual mapping tables. An array of this type is
                     81:  * provided to the pmap system at bootstrap by ppc_vm_init.
                     82:  *
                     83:  * NB : regions must be in order in this structure.
                     84:  */
                     85: 
                     86: typedef struct mem_region {
                     87:        vm_offset_t start;      /* Address of base of region */
                     88:        struct phys_entry *phys_table; /* base of region's table */
                     89:        unsigned int end;       /* End address+1 */
                     90: } mem_region_t;
                     91: 
                     92: /* PMAP_MEM_REGION_MAX has a PowerMac dependancy - at least the value of
                     93:  * kMaxRAMBanks in ppc/POWERMAC/nkinfo.h
                     94:  */
                     95: #define PMAP_MEM_REGION_MAX 26
                     96: 
                     97: extern mem_region_t pmap_mem_regions[PMAP_MEM_REGION_MAX];
                     98: extern int          pmap_mem_regions_count;
                     99: 
                    100: /* keep track of free regions of physical memory so that we can offer
                    101:  * them up via pmap_next_page later on
                    102:  */
                    103: 
                    104: #define FREE_REGION_MAX 8
                    105: extern mem_region_t free_regions[FREE_REGION_MAX];
                    106: extern int          free_regions_count;
                    107: 
                    108: /* Prototypes */
                    109: 
                    110: struct phys_entry *pmap_find_physentry(vm_offset_t pa);
                    111: 
                    112: 
                    113: #if    DEBUG
                    114: extern int pmdebug;
                    115: #define PDB_LOCK       0x100
                    116: #define LOCKPRINTF(args)       if (pmdebug & PDB_LOCK) printf args; else
                    117: #else  /* DEBUG */
                    118: #define LOCKPRINTF(args)
                    119: #endif /* DEBUG */
                    120: 
                    121: extern vm_offset_t     hash_table_base;
                    122: extern unsigned int    hash_table_size;
                    123: 
                    124: #define TLBSYNC_SYNC()                                                 \
                    125:        {                                                               \
                    126:                if (PROCESSOR_VERSION != PROCESSOR_VERSION_601)         \
                    127:                        __asm__ volatile("tlbsync" __CASMNL__ " sync");         \
                    128:        } while (0)
                    129: 
                    130: #endif
                    131: #endif /* _PMAP_INTERNALS_H_ */

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