X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/c0fea4742e91338fffdcf79f86a7c1d5e2b97eb1..8f6c56a50524aa785f7e596d52dddfb331e18961:/osfmk/i386/commpage/commpage.c diff --git a/osfmk/i386/commpage/commpage.c b/osfmk/i386/commpage/commpage.c index 5e347ac29..1eef9af6c 100644 --- a/osfmk/i386/commpage/commpage.c +++ b/osfmk/i386/commpage/commpage.c @@ -1,40 +1,46 @@ /* - * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Here's what to do if you want to add a new routine to the comm page: * - * 1. Add a definition for it's address in osfmk/i386/cpu_capabilities.h, + * 1. Add a definition for it's address in osfmk/ppc/cpu_capabilities.h, * being careful to reserve room for future expansion. * * 2. Write one or more versions of the routine, each with it's own * commpage_descriptor. The tricky part is getting the "special", * "musthave", and "canthave" fields right, so that exactly one * version of the routine is selected for every machine. - * The source files should be in osfmk/i386/commpage/. + * The source files should be in osfmk/ppc/commpage/. * * 3. Add a ptr to your new commpage_descriptor(s) in the "routines" - * array in osfmk/i386/commpage/commpage_asm.s. There are two - * arrays, one for the 32-bit and one for the 64-bit commpage. + * array in commpage_populate(). Of course, you'll also have to + * declare them "extern" in commpage_populate(). * * 4. Write the code in Libc to use the new routine. */ @@ -43,7 +49,6 @@ #include #include #include -#include #include #include #include @@ -51,34 +56,16 @@ #include #include -#include - -/* the lists of commpage routines are in commpage_asm.s */ -extern commpage_descriptor* commpage_32_routines[]; -extern commpage_descriptor* commpage_64_routines[]; - -/* translated commpage descriptors from commpage_sigs.c */ -extern commpage_descriptor sigdata_descriptor; -extern commpage_descriptor *ba_descriptors[]; extern vm_map_t com_region_map32; // the shared submap, set up in vm init -extern vm_map_t com_region_map64; // the shared submap, set up in vm init - -char *commPagePtr32 = NULL; // virtual addr in kernel map of 32-bit commpage -char *commPagePtr64 = NULL; // ...and of 64-bit commpage -int _cpu_capabilities = 0; // define the capability vector - -int noVMX = 0; /* if true, do not set kHasAltivec in ppc _cpu_capabilities */ - -void* dsmos_blobs[3]; /* ptrs to the system integrity data in each commpage */ -int dsmos_blob_count = 0; -static uintptr_t next; // next available byte in comm page -static int cur_routine; // comm page address of "current" routine +static uintptr_t next = 0; // next available byte in comm page +static int cur_routine = 0; // comm page address of "current" routine static int matched; // true if we've found a match for "current" routine -static char *commPagePtr; // virtual addr in kernel map of commpage we are working on -static size_t commPageBaseOffset; // add to 32-bit runtime address to get offset in commpage +int _cpu_capabilities = 0; // define the capability vector + +char *commPagePtr = NULL; // virtual address of comm page in kernel map /* Allocate the commpage and add to the shared submap created by vm: * 1. allocate a page in the kernel map (RW) @@ -88,61 +75,59 @@ static size_t commPageBaseOffset; // add to 32-bit runtime address to get offset */ static void* -commpage_allocate( - vm_map_t submap, // com_region_map32 or com_region_map64 - size_t area_used ) // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED +commpage_allocate( void ) { - vm_offset_t kernel_addr; // address of commpage in kernel map - vm_offset_t zero = 0; - vm_size_t size = area_used; // size actually populated - vm_map_entry_t entry; - ipc_port_t handle; - - if (submap == NULL) - panic("commpage submap is null"); - - if (vm_allocate(kernel_map,&kernel_addr,area_used,VM_FLAGS_ANYWHERE)) - panic("cannot allocate commpage"); - - if (vm_map_wire(kernel_map,kernel_addr,kernel_addr+area_used,VM_PROT_DEFAULT,FALSE)) - panic("cannot wire commpage"); - - /* - * Now that the object is created and wired into the kernel map, mark it so that no delay - * copy-on-write will ever be performed on it as a result of mapping it into user-space. - * If such a delayed copy ever occurred, we could remove the kernel's wired mapping - and - * that would be a real disaster. - * - * JMM - What we really need is a way to create it like this in the first place. - */ - if (!vm_map_lookup_entry( kernel_map, vm_map_trunc_page(kernel_addr), &entry) || entry->is_sub_map) - panic("cannot find commpage entry"); - entry->object.vm_object->copy_strategy = MEMORY_OBJECT_COPY_NONE; - - if (mach_make_memory_entry( kernel_map, // target map - &size, // size - kernel_addr, // offset (address in kernel map) - VM_PROT_DEFAULT, // map it RW - &handle, // this is the object handle we get - NULL )) // parent_entry (what is this?) - panic("cannot make entry for commpage"); - - if (vm_map_64( submap, // target map (shared submap) - &zero, // address (map into 1st page in submap) - area_used, // size - 0, // mask - VM_FLAGS_FIXED, // flags (it must be 1st page in submap) - handle, // port is the memory entry we just made - 0, // offset (map 1st page in memory entry) - FALSE, // copy - VM_PROT_READ, // cur_protection (R-only in user map) - VM_PROT_READ, // max_protection - VM_INHERIT_SHARE )) // inheritance - panic("cannot map commpage"); - - ipc_port_release(handle); - - return (void*) kernel_addr; // return address in kernel map + vm_offset_t kernel_addr; // address of commpage in kernel map + vm_offset_t zero = 0; + vm_size_t size = _COMM_PAGE_AREA_LENGTH; + vm_map_entry_t entry; + ipc_port_t handle; + + if (com_region_map32 == NULL) + panic("commpage map is null"); + + if (vm_allocate(kernel_map,&kernel_addr,_COMM_PAGE_AREA_LENGTH,VM_FLAGS_ANYWHERE)) + panic("cannot allocate commpage"); + + if (vm_map_wire(kernel_map,kernel_addr,kernel_addr+_COMM_PAGE_AREA_LENGTH,VM_PROT_DEFAULT,FALSE)) + panic("cannot wire commpage"); + + /* + * Now that the object is created and wired into the kernel map, mark it so that no delay + * copy-on-write will ever be performed on it as a result of mapping it into user-space. + * If such a delayed copy ever occurred, we could remove the kernel's wired mapping - and + * that would be a real disaster. + * + * JMM - What we really need is a way to create it like this in the first place. + */ + if (!vm_map_lookup_entry( kernel_map, vm_map_trunc_page(kernel_addr), &entry) || entry->is_sub_map) + panic("cannot find commpage entry"); + entry->object.vm_object->copy_strategy = MEMORY_OBJECT_COPY_NONE; + + if (mach_make_memory_entry( kernel_map, // target map + &size, // size + kernel_addr, // offset (address in kernel map) + VM_PROT_DEFAULT, // map it RW + &handle, // this is the object handle we get + NULL )) // parent_entry (what is this?) + panic("cannot make entry for commpage"); + + if (vm_map_64( com_region_map32, // target map (shared submap) + &zero, // address (map into 1st page in submap) + _COMM_PAGE_AREA_LENGTH, // size + 0, // mask + VM_FLAGS_FIXED, // flags (it must be 1st page in submap) + handle, // port is the memory entry we just made + 0, // offset (map 1st page in memory entry) + FALSE, // copy + VM_PROT_READ, // cur_protection (R-only in user map) + VM_PROT_READ, // max_protection + VM_INHERIT_SHARE )) // inheritance + panic("cannot map commpage"); + + ipc_port_release(handle); + + return (void*) kernel_addr; // return address in kernel map } /* Get address (in kernel map) of a commpage field. */ @@ -151,7 +136,7 @@ static void* commpage_addr_of( int addr_at_runtime ) { - return (void*) ((uintptr_t)commPagePtr + addr_at_runtime - commPageBaseOffset); + return (void*) ((uintptr_t)commPagePtr + addr_at_runtime - _COMM_PAGE_BASE_ADDRESS); } /* Determine number of CPUs on this system. We cannot rely on @@ -185,9 +170,6 @@ commpage_init_cpu_capabilities( void ) ml_cpu_get_info(&cpu_info); switch (cpu_info.vector_unit) { - case 6: - bits |= kHasSupplementalSSE3; - /* fall thru */ case 5: bits |= kHasSSE3; /* fall thru */ @@ -224,24 +206,15 @@ commpage_init_cpu_capabilities( void ) bits |= kFastThreadLocalStorage; // we use %gs for TLS - if (cpu_mode_is64bit()) // k64Bit means processor is 64-bit capable - bits |= k64Bit; - _cpu_capabilities = bits; // set kernel version for use by drivers etc } -int -_get_cpu_capabilities() -{ - return _cpu_capabilities; -} - /* Copy data into commpage. */ static void commpage_stuff( int address, - const void *source, + void *source, int length ) { void *dest = commpage_addr_of(address); @@ -254,38 +227,13 @@ commpage_stuff( next = ((uintptr_t)dest + length); } -static void -commpage_stuff_swap( - int address, - void *source, - int length, - int legacy ) -{ - if ( legacy ) { - void *dest = commpage_addr_of(address); - dest = (void *)((uintptr_t) dest + _COMM_PAGE_SIGS_OFFSET); - switch (length) { - case 2: - OSWriteSwapInt16(dest, 0, *(uint16_t *)source); - break; - case 4: - OSWriteSwapInt32(dest, 0, *(uint32_t *)source); - break; - case 8: - OSWriteSwapInt64(dest, 0, *(uint64_t *)source); - break; - } - } -} static void commpage_stuff2( - int address, - void *source, - int length, - int legacy ) + int address, + void *source, + int length ) { - commpage_stuff_swap(address, source, length, legacy); commpage_stuff(address, source, length); } @@ -299,7 +247,7 @@ commpage_stuff_routine( if (rd->commpage_address != cur_routine) { if ((cur_routine!=0) && (matched==0)) - panic("commpage no match for last, next address %08x", rd->commpage_address); + panic("commpage no match"); cur_routine = rd->commpage_address; matched = 0; } @@ -309,60 +257,100 @@ commpage_stuff_routine( if ((must == rd->musthave) && (cant == 0)) { if (matched) - panic("commpage multiple matches for address %08x", rd->commpage_address); + panic("commpage duplicate matches"); matched = 1; commpage_stuff(rd->commpage_address,rd->code_address,rd->code_length); } } -/* Fill in the 32- or 64-bit commpage. Called once for each. - * The 32-bit ("legacy") commpage has a bunch of stuff added to it - * for translated processes, some of which is byte-swapped. + +#define COMMPAGE_DESC(name) commpage_ ## name +#define EXTERN_COMMPAGE_DESC(name) \ + extern commpage_descriptor COMMPAGE_DESC(name) + +EXTERN_COMMPAGE_DESC(compare_and_swap32_mp); +EXTERN_COMMPAGE_DESC(compare_and_swap32_up); +EXTERN_COMMPAGE_DESC(compare_and_swap64_mp); +EXTERN_COMMPAGE_DESC(compare_and_swap64_up); +EXTERN_COMMPAGE_DESC(atomic_add32_mp); +EXTERN_COMMPAGE_DESC(atomic_add32_up); +EXTERN_COMMPAGE_DESC(mach_absolute_time); +EXTERN_COMMPAGE_DESC(spin_lock_try_mp); +EXTERN_COMMPAGE_DESC(spin_lock_try_up); +EXTERN_COMMPAGE_DESC(spin_lock_mp); +EXTERN_COMMPAGE_DESC(spin_lock_up); +EXTERN_COMMPAGE_DESC(spin_unlock); +EXTERN_COMMPAGE_DESC(pthread_getspecific); +EXTERN_COMMPAGE_DESC(gettimeofday); +EXTERN_COMMPAGE_DESC(sys_flush_dcache); +EXTERN_COMMPAGE_DESC(sys_icache_invalidate); +EXTERN_COMMPAGE_DESC(pthread_self); +EXTERN_COMMPAGE_DESC(relinquish); +EXTERN_COMMPAGE_DESC(bit_test_and_set_mp); +EXTERN_COMMPAGE_DESC(bit_test_and_set_up); +EXTERN_COMMPAGE_DESC(bit_test_and_clear_mp); +EXTERN_COMMPAGE_DESC(bit_test_and_clear_up); +EXTERN_COMMPAGE_DESC(bzero_scalar); +EXTERN_COMMPAGE_DESC(bcopy_scalar); +EXTERN_COMMPAGE_DESC(nanotime); + +static commpage_descriptor *routines[] = { + &COMMPAGE_DESC(compare_and_swap32_mp), + &COMMPAGE_DESC(compare_and_swap32_up), + &COMMPAGE_DESC(compare_and_swap64_mp), + &COMMPAGE_DESC(compare_and_swap64_up), + &COMMPAGE_DESC(atomic_add32_mp), + &COMMPAGE_DESC(atomic_add32_up), + &COMMPAGE_DESC(mach_absolute_time), + &COMMPAGE_DESC(spin_lock_try_mp), + &COMMPAGE_DESC(spin_lock_try_up), + &COMMPAGE_DESC(spin_lock_mp), + &COMMPAGE_DESC(spin_lock_up), + &COMMPAGE_DESC(spin_unlock), + &COMMPAGE_DESC(pthread_getspecific), + &COMMPAGE_DESC(gettimeofday), + &COMMPAGE_DESC(sys_flush_dcache), + &COMMPAGE_DESC(sys_icache_invalidate), + &COMMPAGE_DESC(pthread_self), + &COMMPAGE_DESC(relinquish), + &COMMPAGE_DESC(bit_test_and_set_mp), + &COMMPAGE_DESC(bit_test_and_set_up), + &COMMPAGE_DESC(bit_test_and_clear_mp), + &COMMPAGE_DESC(bit_test_and_clear_up), + &COMMPAGE_DESC(bzero_scalar), + &COMMPAGE_DESC(bcopy_scalar), + &COMMPAGE_DESC(nanotime), + NULL +}; + + +/* Fill in commpage: called once, during kernel initialization, from the + * startup thread before user-mode code is running. + * See the top of this file for a list of what you have to do to add + * a new routine to the commpage. */ -static void -commpage_populate_one( - vm_map_t submap, // com_region_map32 or com_region_map64 - char ** kernAddressPtr, // &commPagePtr32 or &commPagePtr64 - size_t area_used, // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED - size_t base_offset, // will become commPageBaseOffset - commpage_descriptor** commpage_routines, // list of routine ptrs for this commpage - boolean_t legacy, // true if 32-bit commpage - const char* signature ) // "commpage 32-bit" or "commpage 64-bit" +void +commpage_populate( void ) { short c2; static double two52 = 1048576.0 * 1048576.0 * 4096.0; // 2**52 static double ten6 = 1000000.0; // 10**6 commpage_descriptor **rd; short version = _COMM_PAGE_THIS_VERSION; - int swapcaps; - next = (uintptr_t) NULL; - cur_routine = 0; - commPagePtr = (char *)commpage_allocate( submap, (vm_size_t) area_used ); - *kernAddressPtr = commPagePtr; // save address either in commPagePtr32 or 64 - commPageBaseOffset = base_offset; + commPagePtr = (char *)commpage_allocate(); + + commpage_init_cpu_capabilities(); /* Stuff in the constants. We move things into the comm page in strictly * ascending order, so we can check for overlap and panic if so. */ - commpage_stuff(_COMM_PAGE_SIGNATURE,signature,strlen(signature)); - commpage_stuff2(_COMM_PAGE_VERSION,&version,sizeof(short),legacy); - commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES,&_cpu_capabilities,sizeof(int)); - - /* excuse our magic constants, we cannot include ppc/cpu_capabilities.h */ - /* always set kCache32 and kDcbaAvailable */ - swapcaps = 0x44; - if ( _cpu_capabilities & kUP ) - swapcaps |= (kUP + (1 << kNumCPUsShift)); - else - swapcaps |= 2 << kNumCPUsShift; /* limit #cpus to 2 */ - if ( ! noVMX ) /* if rosetta will be emulating altivec... */ - swapcaps |= 0x101; /* ...then set kHasAltivec and kDataStreamsAvailable too */ - commpage_stuff_swap(_COMM_PAGE_CPU_CAPABILITIES, &swapcaps, sizeof(int), legacy); - c2 = 32; - commpage_stuff_swap(_COMM_PAGE_CACHE_LINESIZE,&c2,2,legacy); + + commpage_stuff2(_COMM_PAGE_VERSION,&version,sizeof(short)); + commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES,&_cpu_capabilities, + sizeof(int)); if (_cpu_capabilities & kCache32) c2 = 32; @@ -372,12 +360,13 @@ commpage_populate_one( c2 = 128; commpage_stuff(_COMM_PAGE_CACHE_LINESIZE,&c2,2); - if ( legacy ) { - commpage_stuff2(_COMM_PAGE_2_TO_52,&two52,8,legacy); - commpage_stuff2(_COMM_PAGE_10_TO_6,&ten6,8,legacy); - } + c2 = 32; - for( rd = commpage_routines; *rd != NULL ; rd++ ) + commpage_stuff2(_COMM_PAGE_2_TO_52,&two52,8); + + commpage_stuff2(_COMM_PAGE_10_TO_6,&ten6,8); + + for( rd = routines; *rd != NULL ; rd++ ) commpage_stuff_routine(*rd); if (!matched) @@ -386,54 +375,35 @@ commpage_populate_one( if (next > (uintptr_t)_COMM_PAGE_END) panic("commpage overflow: next = 0x%08x, commPagePtr = 0x%08x", next, (uintptr_t)commPagePtr); - if ( legacy ) { - next = (uintptr_t) NULL; - for( rd = ba_descriptors; *rd != NULL ; rd++ ) - commpage_stuff_routine(*rd); - - next = (uintptr_t) NULL; - commpage_stuff_routine(&sigdata_descriptor); - } - /* salt away a ptr to the system integrity data in this commpage */ - dsmos_blobs[dsmos_blob_count++] = - commpage_addr_of( _COMM_PAGE_SYSTEM_INTEGRITY ); + pmap_commpage_init((vm_offset_t) commPagePtr, _COMM_PAGE_BASE_ADDRESS, + _COMM_PAGE_AREA_LENGTH/INTEL_PGBYTES); } - -/* Fill in commpages: called once, during kernel initialization, from the - * startup thread before user-mode code is running. - * - * See the top of this file for a list of what you have to do to add - * a new routine to the commpage. - */ +/* + * This macro prevents compiler instruction scheduling: + */ +#define NO_REORDERING asm volatile("" : : : "memory") void -commpage_populate( void ) +commpage_set_nanotime(commpage_nanotime_t *newp) { - commpage_init_cpu_capabilities(); - - commpage_populate_one( com_region_map32, - &commPagePtr32, - _COMM_PAGE32_AREA_USED, - _COMM_PAGE32_BASE_ADDRESS, - commpage_32_routines, - TRUE, /* legacy (32-bit) commpage */ - "commpage 32-bit"); - pmap_commpage32_init((vm_offset_t) commPagePtr32, _COMM_PAGE32_BASE_ADDRESS, - _COMM_PAGE32_AREA_USED/INTEL_PGBYTES); - - if (_cpu_capabilities & k64Bit) { - commpage_populate_one( com_region_map64, - &commPagePtr64, - _COMM_PAGE64_AREA_USED, - _COMM_PAGE32_START_ADDRESS, /* because kernel is built 32-bit */ - commpage_64_routines, - FALSE, /* not a legacy commpage */ - "commpage 64-bit"); - pmap_commpage64_init((vm_offset_t) commPagePtr64, _COMM_PAGE64_BASE_ADDRESS, - _COMM_PAGE64_AREA_USED/INTEL_PGBYTES); - } + commpage_nanotime_t *cnp; + + /* Nop if commpage not set up yet */ + if (commPagePtr == NULL) + return; - rtc_nanotime_init_commpage(); + cnp = (commpage_nanotime_t *)commpage_addr_of(_COMM_PAGE_NANOTIME_INFO); + + /* + * Update in reverse order: + * check_tsc first - it's read and compared with base_tsc last. + */ + cnp->nt_check_tsc = newp->nt_base_tsc; NO_REORDERING; + cnp->nt_shift = newp->nt_shift; NO_REORDERING; + cnp->nt_scale = newp->nt_scale; NO_REORDERING; + cnp->nt_base_ns = newp->nt_base_ns; NO_REORDERING; + cnp->nt_base_tsc = newp->nt_base_tsc; } +